H	SECTION H ELECTRICITY
H01	BASIC ELECTRIC ELEMENTS
H01B	CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING, OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F0001000000;waveguides H01P; installation of cables or lines H02G)
H01B0001000000	Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors (superconductive or hyperconductive conductors, cables, or transmission lines characterised by the materials H01B0012000000;resistors H01C; details of devices using superconductivity or hyperconductivity, characterised by the material H01L0039120000)
H01B0001020000	mainly consisting of metals or alloys
H01B0001040000	mainly consisting of carbon-silicon compounds, carbon, or silicon
H01B0001060000	mainly consisting of other non-metallic substances
H01B0001080000	oxides
H01B0001100000	sulphides
H01B0001120000	organic substances
H01B0001140000	Conductive material dispersed in non-conductive inorganic material
H01B0001160000	the conductive material comprising metals or alloys
H01B0001180000	the conductive material comprising carbon-silicon compounds, carbon, or silicon
H01B0001200000	Conductive material dispersed in non-conductive organic material
H01B0001220000	the conductive material comprising metals or alloys
H01B0001240000	the conductive material comprising carbon-silicon compounds, carbon, or silicon
H01B0003000000	Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties (selection of piezo-electric or electrostrictive materials H01L0041000000);;
H01B0003020000	mainly consisting of inorganic substances
H01B0003040000	mica
H01B0003060000	asbestos
H01B0003080000	quartz; glass; glass wool; slag wool; vitreous enamels
H01B0003100000	metallic oxides (ceramics H01B0003120000);;
H01B0003120000	ceramics
H01B0003140000	cements
H01B0003160000	gases
H01B0003180000	mainly consisting of organic substances
H01B0003200000	liquids, e.g. oils (silicone oils H01B0003460000);;
H01B0003220000	hydrocarbons
H01B0003240000	containing halogen in the molecules, e.g. halogenated oils
H01B0003260000	asphalts; bitumens; pitches
H01B0003280000	natural or synthetic rubbers
H01B0003300000	resins; waxes
H01B0003320000	natural resins
H01B0003340000	waxes (silicone waxes H01B0003460000);;
H01B0003360000	condensation products of phenols with aldehydes or ketones
H01B0003380000	condensation products of aldehydes with amines or amides
H01B0003400000	epoxy resins
H01B0003420000	polyesters; polyethers; polyacetals
H01B0003440000	vinyl resins; acrylic resins (silicones H01B0003460000);;
H01B0003460000	silicones
H01B0003480000	fibrous materials
H01B0003500000	fabric
H01B0003520000	wood; paper; pressboard
H01B0003540000	hard paper; hard fabrics
H01B0003560000	gases
H01B0005000000	Non-insulated conductors or conductive bodies characterised by their form
H01B0005020000	Single bars, rods, wires, or strips
H01B0005040000	wound or coiled
H01B0005060000	Single tubes
H01B0005080000	Several wires or the like stranded in the form of a rope
H01B0005100000	stranded around a space, insulating material, or dissimilar conducting material
H01B0005120000	Braided wires or the like
H01B0005140000	comprising conductive layers or films on insulating-supports (insulating-layers or insulating-films on metal bodies H01B0017620000);;
H01B0005160000	comprising conductive material in insulating or poorly conductive material, e.g. conductive rubber (H01B0001140000, H01B0001200000 take precedence;insulating bodies with conductive admixtures H01B0017640000; conductive paints C09D0005240000)
H01B0007000000	Insulated conductors or cables characterised by their form
H01B0007020000	Disposition of insulation (materials H01B0003000000;insulators H01B0017000000)
H01B0007040000	Flexible cables, conductors, or cords, e.g. trailing cables
H01B0007060000	Extensible conductors or cables, e.g. self-coiling cords (installations using extensible carrier for the cable H02G0011060000);;
H01B0007080000	Flat or ribbon cables
H01B0007100000	Contact cables, i.e. having conductors which may be brought into contact by distortion of the cable
H01B0007120000	Floating cables (installations of cables supported on or from floats H02G0009120000);;
H01B0007140000	Submarine cables
H01B0007160000	Rigid-tube cables (heating elements of similar construction H05B);;
H01B0007180000	Sheaths; Armouring; Other protection against mechanical force or pressure (power cables with screens H01B0009020000;communication cables with screens H01B0011060000; continuously-loaded cables H01B0011140000; installation of conduits H02G)
H01B0007200000	Metal tubes, e.g. lead sheaths
H01B0007220000	Metal wires or tapes, e.g. made of steel
H01B0007240000	Devices affording localised protection against mechanical force or pressure
H01B0007260000	Reduction of losses in sheaths or armouring
H01B0007280000	Protection, e.g. against corrosion, chemical attack, influence of weather (sheaths, armouring H01B0007180000);;
H01B0007300000	with arrangements for reducing conductor losses when carrying ac, e.g. due to skin effect
H01B0007320000	with arrangements for indicating defects, e.g. breaks, leaks (locating defects by measuring G01);;
H01B0007340000	with arrangements for heat dissipation, shielding, or conduction
H01B0007360000	with distinguishing or length marks
H01B0009000000	Power cables
H01B0009020000	with screens or conductive layers, e.g. for avoiding large potential gradients
H01B0009040000	Concentric cables
H01B0009060000	Gas-pressure cables; Oil-pressure cables; Cables for use in conduits under fluid pressure
H01B0011000000	Communication cables or conductors (waveguides H01P);;
H01B0011020000	Cables with twisted pairs or quads (transposing, crossing, or twisting at joints H04B;balancing of earth capacitance H04B)
H01B0011040000	with pairs or quads mutually positioned to reduce cross-talk (balancing by making use of additional capacitors or coils H04B);;
H01B0011060000	with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screen (screening in general H05K0009000000);;
H01B0011080000	Screens specially adapted for reducing cross-talk
H01B0011100000	Screens specially adapted for reducing interference from external sources
H01B0011120000	Arrangements for exhibiting specific transmission characteristics (loading coils per se H01F0017080000;coil-loaded circuits H04B)
H01B0011140000	Continuously inductively loaded cables, e.g. Krarup cables
H01B0011160000	Cables, e.g. submarine cable, with coils or other devices incorporated during cable manufacture (junction boxes for cables H02G0015100000);;
H01B0011180000	Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor (suitable for handling frequencies considerably beyond the audio range H01P0003060000);;
H01B0011200000	Cables having a multiplicity of coaxial lines
H01B0011220000	Cables including at least one electrical conductor together with optical fibres
H01B0012000000	Superconductive or hyperconductive conductors, cables, or transmission lines (details or devices using superconductivity or hyperconductivity characterised by the material H01L0039120000);;
H01B0012020000	characterised by their form
H01B0012040000	Single wire
H01B0012060000	Films or wires on bases or cores
H01B0012080000	Stranded or braided wires
H01B0012100000	Multi-filaments embedded in normal conductors
H01B0012120000	Hollow conductors
H01B0012140000	characterised by the disposition of thermal insulation
H01B0012160000	characterised by cooling
H01B0013000000	Apparatus or processes specially adapted for manufacturing conductors or cables
H01B0013020000	Stranding-up (stranding-up ropes D07B);;
H01B0013040000	Mutually-positioning pairs or quads to reduce cross-talk
H01B0013060000	Insulating conductors or cables (H01B0013320000 takes precedence);;
H01B0013080000	by winding
H01B0013100000	by longitudinal lapping
H01B0013120000	by applying loose fibres
H01B0013140000	by extrusion
H01B0013160000	by passing through, or dipping in, a liquid bath; by spraying
H01B0013180000	Applying discontinuous insulation, e.g. discs, beads
H01B0013200000	for concentric or coaxial cables
H01B0013220000	Sheathing; Armouring; Screening; Applying other protective layers (H01B0013320000 takes precedence);;
H01B0013240000	by extrusion
H01B0013260000	by winding, braiding, or longitudinal lapping (winding in general B65H);;
H01B0013280000	Applying continuous inductive loading, e.g. Krarup loading
H01B0013300000	Drying (in general F26B);;Impregnating (H01B0013320000 takes precedence);;
H01B0013320000	Filling or coating with impervious material (for cable installations H02G0015000000);;
H01B0015000000	Apparatus or processes for salvaging material from cables (for removing insulation from conductors H02G0001120000);;
H01B0017000000	Insulators or insulating bodies characterised by their form (section insulators for electric traction B60M0001180000;insulating rail-joints E01B0011540000)
H01B0017020000	Suspension insulators; Strain insulators
H01B0017040000	Chains; Multiple chains
H01B0017060000	Fastening of insulator to support, to conductor, or to adjoining insulator
H01B0017080000	by cap-and-bolt
H01B0017100000	by intermediate link
H01B0017120000	Special features of strain insulators (devices for relieving mechanical tension of electric lines or cables H02G0007040000);;
H01B0017140000	Supporting insulators (pin insulators H01B0017200000;apertured insulators H01B0017240000)
H01B0017160000	Fastening of insulators to support, to conductor, or to adjoining insulator
H01B0017180000	for very heavy conductors, e.g. bus-bars, rails
H01B0017200000	Pin insulators
H01B0017220000	Fastening of conductors to insulator
H01B0017240000	Insulators apertured for fixing by nail, screw, wire, or bar, e.g. diabolo, bobbin
H01B0017260000	Lead-in insulators; Lead-through insulators
H01B0017280000	Capacitor type (capacitors H01G);;
H01B0017300000	Sealing (packings in general F16J);;
H01B0017320000	Single insulators consisting of two or more dissimilar insulating bodies
H01B0017340000	Insulators containing liquid, e.g. oil
H01B0017360000	Insulators having evacuated or gas-filled spaces
H01B0017380000	Fittings, e.g. caps; Fastenings therefor
H01B0017400000	Cementless fittings
H01B0017420000	Means for obtaining improved distribution of voltage (capacitor-type lead-through insulators H01B0017280000);;Protection against arc discharges
H01B0017440000	Structural association of insulators with corona rings (corona rings H01T0019020000);;
H01B0017460000	Means for providing an external arc-discharge path (spark-gap arresters H01T);;
H01B0017480000	over chains or other serially-arranged insulators
H01B0017500000	with surfaces specially treated for preserving insulating properties, e.g. for protection against moisture, dirt, or the like
H01B0017520000	having cleaning devices (H01B0017540000 takes precedence);;
H01B0017540000	having heating or cooling devices
H01B0017560000	Insulating bodies (insulators H01B0017020000-H01B0017540000);
H01B0017580000	Tubes, sleeves, beads, or bobbins through which the conductor passes (protective tubings for the installation of lines or cables in buildings H02G0003040000);;
H01B0017600000	Composite insulating bodies (cables or conductors H01B0007000000, H01B0009000000;resistors H01C; capacitors H01G)
H01B0017620000	Insulating-layers or insulating-films on metal bodies (conductive layers or films on insulating bodies H01B0005140000);;
H01B0017640000	with conductive admixtures, inserts, or layers (conductive bodies comprising conductive material dispersed in insulating material H01B0005160000);;
H01B0017660000	Joining insulating bodies together, e.g. by bonding
H01B0019000000	Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
H01B0019020000	Drying (in general F26B);;Impregnating
H01B0019040000	Treating the surfaces, e.g. applying coatings
H01C	RESISTORS
H01C0001000000	Details
H01C0001010000	Mounting; Supporting
H01C0001012000	the base extending along, and imparting rigidity or reinforcement to, the resistive element (H01C0001016000 takes precedence;the resistive element being formed in two or more coils or loops as a spiral, helical, or toroidal winding H01C0003180000, H01C0003200000; the resistive element being formed as one or more layers or coatings on a base H01C0007000000)
H01C0001014000	the resistor being suspended between, and being supported by, two supporting sections (H01C0001016000 takes precedence);;
H01C0001016000	with compensation for resistor expansion or contraction
H01C0001020000	Housing; Enclosing; Embedding; Filling the housing or enclosure
H01C0001022000	the housing or enclosure being openable or separable from the resistive element
H01C0001024000	the housing or enclosure being hermetically sealed (H01C0001028000, H01C0001032000, H01C0001034000 take precedence);;
H01C0001026000	with gaseous or vacuum spacing between the resistive element and the housing or casing
H01C0001028000	the resistive element being embedded in insulation with outer enclosing sheath
H01C0001030000	with powdered insulation
H01C0001032000	plural layers surrounding the resistive element (H01C0001028000 takes precedence);;
H01C0001034000	the housing or enclosure being formed as coating or mold without outer sheath (H01C0001032000 takes precedence);;
H01C0001036000	on wound resistive element
H01C0001040000	Arrangements of distinguishing marks, e.g. colour coding
H01C0001060000	Electrostatic or electromagnetic shielding arrangements
H01C0001080000	Cooling, heating, or ventilating arrangements
H01C0001082000	using forced fluid flow
H01C0001084000	using self-cooling, e.g. fins, heat sinks
H01C0001120000	Arrangements of current collectors
H01C0001125000	of fluid contacts
H01C0001140000	Terminals or tapping points specially adapted for resistors (in general H01R);;Arrangements of terminals or tapping points on resistors
H01C0001142000	the terminals or tapping points being coated on the resistive element
H01C0001144000	the terminals or tapping points being welded or soldered
H01C0001146000	the resistive element surrounding the terminal
H01C0001148000	the terminals embracing or surrounding the resistive element (H01C0001142000 takes precedence);;
H01C0001160000	Resistor networks not otherwise provided for
H01C0003000000	Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven, or formed as grids
H01C0003020000	arranged or constructed for reducing self-induction, capacitance, or variation with frequency
H01C0003040000	Iron-filament ballast resistors; Other resistors having variable temperature coefficient
H01C0003060000	Flexible or folding resistors, whereby such a resistor can be looped or collapsed upon itself
H01C0003080000	Dimension or characteristic of resistive element changing gradually or in discrete steps from one terminal to another
H01C0003100000	the resistive element having zig-zag or sinusoidal configuration
H01C0003120000	lying in one plane
H01C0003140000	the resistive element being formed in two or more coils or loops continuously wound as a spiral, helical, or toroidal winding (H01C0003020000-H01C0003120000;  take precedence);;
H01C0003160000	including two or more distinct wound elements, or two or more winding patterns
H01C0003180000	wound on a flat or ribbon base (H01C0003160000 takes precedence);;
H01C0003200000	wound on cylindrical or prismatic base (H01C0003160000 takes precedence);;
H01C0007000000	Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material (consisting of loose powdered or granular material H01C0008000000;resistors with a potential-jump barrier or surface barrier, e.g. field effect resistors, H01L0029000000; semiconductor devices sensitive to electromagnetic or corpuscular radiation, e.g. photoresistors, H01L0031000000; devices using superconductivity or hyperconductivity H01L0039000000; devices using galvano-magnetic or similar magnetic effects, e.g. magnetic-field-controlled resistors, H01L0043000000; solid state devices for rectifying, amplifying, oscillating, or switching without a potential-jump barrier or surface barrier H01L0045000000; bulk negative resistance effect devices H01L0047000000)
H01C0007020000	having positive temperature coefficient
H01C0007040000	having negative temperature coefficient
H01C0007060000	including means to minimise changes in resistance with changes in temperature
H01C0007100000	voltage-responsive
H01C0007120000	Overvoltage protection resistors; Arresters
H01C0007130000	current-responsive
H01C0007180000	comprising a plurality of layers stacked between terminals
H01C0007200000	the resistive layer or coating being tapered
H01C0007220000	Elongated resistive element being bent or curved, e.g. sinusoidal, helical
H01C0008000000	Non-adjustable resistors consisting of loose powdered or granular conducting, or powdered or granular semi-conducting material
H01C0008020000	Coherers or like imperfect resistors for detecting electromagnetic waves
H01C0008040000	Overvoltage protection resistors; Arresters
H01C0010000000	Adjustable resistors
H01C0010020000	Liquid resistors
H01C0010040000	with specified mathematical relationship between movement of resistor actuating means and value of resistance, other than direct proportional relationship
H01C0010060000	adjustable by short-circuiting different amounts of the resistive element
H01C0010080000	with intervening conducting structure between the resistive element and the short-circuiting means, e.g. taps
H01C0010100000	adjustable by mechanical pressure or force
H01C0010120000	by changing surface pressure between resistive masses or resistive and conductive masses, e.g. pile type
H01C0010140000	adjustable by auxiliary driving means
H01C0010160000	including plural resistive elements
H01C0010180000	including coarse and fine resistive elements
H01C0010200000	Contact structure or movable resistive elements being ganged
H01C0010220000	resistive-element dimensions changing gradually in one direction, e.g. tapered resistive element (H01C0010040000 takes precedence);;
H01C0010230000	resistive-element dimensions changing in a series of discrete, progressive steps
H01C0010240000	the contact moving along turns of a helical resistive element, or ; vice versa
H01C0010260000	resistive element moving (H01C0010160000, H01C0010240000 take precedence);;
H01C0010280000	the contact rocking or rolling along resistive element or taps
H01C0010300000	the contact sliding along resistive element
H01C0010320000	the contact moving in an arcuate path
H01C0010340000	the contact or the associated conducting structure riding on collector formed as a ring or portion thereof
H01C0010360000	structurally combined with switching arrangements
H01C0010380000	the contact moving along a straight path
H01C0010400000	screw-operated
H01C0010420000	the contact bridging and sliding along resistive element and parallel conducting bar or collector
H01C0010440000	the contact bridging and sliding along resistive element and parallel conducting bar or collector (H01C0010420000 takes precedence);;
H01C0010460000	Arrangements of fixed resistors with intervening connectors, e.g. taps (H01C0010280000, H01C0010300000 take precedence);;
H01C0010480000	including contact movable in an arcuate path
H01C0010500000	structurally combined with switching arrangement (H01C0010360000 takes precedence);;
H01C0011000000	Non-adjustable liquid resistors
H01C0013000000	Resistors not provided for elsewhere
H01C0013020000	Structural combinations of resistors (impedance networks per se H03H);;
H01C0017000000	Apparatus or processes specially adapted for manufacturing resistors (providing fillings for housings or enclosures H01C0001020000;reducing insulation surrounding a resistor to powder H01C0001030000; manufacture of thermally variable resistors H01C0007020000, H01C0007040000)
H01C0017020000	adapted for manufacturing resistors with envelope or housing
H01C0017040000	adapted for winding the resistive element
H01C0017060000	adapted for coating resistive material on a base
H01C0017080000	by vapour deposition
H01C0017100000	by flame spraying
H01C0017120000	by sputtering
H01C0017140000	by chemical deposition
H01C0017160000	using electric current
H01C0017180000	without using electric current
H01C0017200000	by pyrolytic processes
H01C0017220000	adapted for trimming
H01C0017240000	by removing or adding resistive material
H01C0017260000	by converting resistive material
H01C0017280000	adapted for applying terminals
H01C0017300000	adapted for baking
H01F	MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES (ceramics based on ferrites C04B0035260000;alloys C22C; thermomagnetic devices H01L0037000000)
H01F0001000000	Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
H01F0001020000	of hard-magnetic materials
H01F0001040000	metals or alloys
H01F0001060000	in the form of particles, e.g. powder
H01F0001080000	pressed, sintered, or bound together
H01F0001090000	mixtures of metallic and non-metallic particles; metallic particles having oxide skin
H01F0001100000	non-metallic substances, e.g. ferrites
H01F0001110000	in the form of particles
H01F0001113000	in a bonding agent
H01F0001117000	Flexible bodies
H01F0001120000	of soft-magnetic materials
H01F0001140000	metals or alloys
H01F0001160000	in the form of sheets
H01F0001180000	with insulating coating
H01F0001200000	in the form of particles, e.g. powder
H01F0001220000	pressed, sintered, or bound together
H01F0001240000	the particles being insulated
H01F0001260000	by macromolecular organic substances
H01F0001280000	dispersed or suspended in a liquid or plastic medium
H01F0001300000	having specific size or shape (particles of different materials H01F0001320000);;
H01F0001320000	the particles being of different materials
H01F0001330000	mixtures of metallic and non-metallic particles; metallic particles having oxide skin
H01F0001340000	non-metallic substances, e.g. ferrites
H01F0001360000	in the form of particles
H01F0001370000	in a bonding agent
H01F0001375000	Flexible bodies
H01F0003000000	Cores, yokes, or armatures (magnetic materials H01F0001000000;permanent magnets H01F0007020000)
H01F0003020000	made from sheets
H01F0003040000	made from strips or ribbons
H01F0003060000	made from wires
H01F0003080000	made from powder (powder coatings on sheets H01F0003020000, on strips or ribbons H01F0003040000, on wires H01F0003060000);;
H01F0003100000	Composite arrangements of magnetic circuits
H01F0003120000	Magnetic shunt paths
H01F0003140000	Constrictions; Gaps, e.g. air-gaps (in magnetic shunt paths H01F0003120000);;
H01F0005000000	Coils (for transducers H04R);;
H01F0005020000	wound on non-magnetic supports, e.g. formers
H01F0005040000	Arrangements of electric connections to coils, e.g. leads
H01F0005060000	Insulation of windings
H01F0005080000	with superconductive windings
H01F0007000000	Magnets (for purifying liquids, for separating ores B03C;for bench or like work-holders B23B0031280000, B23Q0003000000; work-holding devices B25B0011000000; lifting magnets B66C0001000000; for electric meters G01R; for relays H01H; for dynamo-electric machines H02K; for electroacoustic devices H04R)
H01F0007020000	Permanent magnets
H01F0007040000	Means for releasing the attractive force
H01F0007060000	Electromagnets
H01F0007080000	with armatures
H01F0007100000	specially adapted for ac
H01F0007120000	having anti-chattering arrangements
H01F0007130000	characterised by pulling-force characteristic
H01F0007140000	Pivoting armatures
H01F0007160000	Rectilinearly-movable armatures
H01F0007180000	Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
H01F0007200000	without armatures
H01F0007220000	having superconductive windings
H01F0007240000	supplying energising or de-energising current; Flux pumps
H01F0010000000	Thin magnetic films, e.g. of one-domain structure (magnetic record carriers G11B0005000000;thin-film magnetic stores G11C)
H01F0010060000	characterised by the coupling or physical contact with connecting or interacting conductors
H01F0010080000	characterised by magnetic layers (applying thin magnetic films to substrates H01F0041140000);;
H01F0010100000	characterised by the composition
H01F0010120000	being metals or alloys (intermetallic compounds H01F0010180000);;
H01F0010140000	containing iron or nickel (H01F0010160000 takes precedence);;
H01F0010160000	containing cobalt
H01F0010180000	being compounds
H01F0010200000	Ferrites
H01F0010220000	Orthoferrites
H01F0010240000	Garnets
H01F0010260000	characterised by the substrate or intermediate layers
H01F0010280000	characterised by the composition of the substrate
H01F0010300000	characterised by the composition of intermediate layers
H01F0013000000	Apparatus or processes for magnetising or demagnetising (for degaussing ships B63G0009060000;for clocks or watches G04D0009000000; demagnetising arrangements for colour television H04N0009290000)
H01F0015000000	Details of inductances or transformers covered by groups ; H01F0017000000-H01F0021000000
H01F0015020000	Mounting; Housing; Enclosing; Filling the housing or enclosure
H01F0015040000	Electrostatic or electromagnetic shielding (movable for varying inductance H01F0021100000);;
H01F0015060000	Cooling; Heating; Ventilating
H01F0015080000	Protection against corrosion
H01F0015100000	Terminals; Tapping arrangements
H01F0015120000	Arrangements for interchanging inductances, transformers, or coils thereof
H01F0015140000	with special arrangement or spacing of turns of the windings, e.g. to produce desired self-resonance
H01F0015160000	with temperature compensation
H01F0015180000	Circuits for modifying, or compensating for, electric characteristics of inductances or transformers (impedance networks H03H);;
H01F0017000000	Inductances (coils in general H01F0005000000;variable inductances H01F0021000000; for power supply H01F0029000000, H01F0037000000, H01F0039000000)
H01F0017020000	without magnetic core
H01F0017030000	with ceramic former
H01F0017040000	with magnetic core
H01F0017060000	with core substantially closed in itself, e.g. toroid
H01F0017080000	Loading coils for telecommunication circuits
H01F0019000000	Transformers or mutual inductances (H01F0036000000 takes precedence;variable H01F0021000000; for power supply H01F0029000000-H01F0035000000, H01F0039000000)
H01F0019020000	Audio-frequency transformers or mutual inductances, i.e. not suitable for handling frequencies considerably beyond the audio range
H01F0019040000	Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range (resonant circuits H03H);;
H01F0019060000	Broad-band transformers, e.g. suitable for handling frequencies well down into the audio range
H01F0019080000	Transformers having magnetic bias, e.g. for handling pulses
H01F0021000000	Variable inductances or transformers, e.g. constructions for changing voltage ratio or frequency range (H01F0036000000 takes precedence;for power supply H01F0029000000, H01F0039000000)
H01F0021020000	continuously variable, e.g. variometers
H01F0021040000	by relative movement of turns or parts of windings
H01F0021060000	by movement of core or part of core relative to the windings as a whole
H01F0021080000	by varying the permeability of the core, e.g. by varying magnetic bias
H01F0021100000	by means of a movable shield
H01F0021120000	discontinuously variable, e.g. tapped
H01F0023000000	Connectors with inductive coupling, i.e. with movable core, coil, or winding for making connections without contact
H01F0027000000	Constructional details of transformers or inductances in general
H01F0027020000	Casings
H01F0027040000	Leading of conductors or axles through casings, e.g. for tap-changing arrangements
H01F0027060000	Mounting, supporting, or suspending transformers, reactors, or choke coils
H01F0027080000	Cooling (heat-transfer elements F28F);;Ventilating (structural details of casings H01F0027020000);;
H01F0027100000	Liquid cooling
H01F0027120000	Oil cooling
H01F0027140000	Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
H01F0027160000	Water cooling
H01F0027180000	by evaporating liquids
H01F0027200000	Cooling by special gases or non-ambient air
H01F0027220000	Cooling by heat conduction through solid or powdered fillings
H01F0027240000	Magnetic cores
H01F0027260000	Fastening parts of the core together; Fastening or mounting the core on casing or support (on coil H01F0027300000);;
H01F0027280000	Coils; Windings; Conductive connections
H01F0027300000	Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
H01F0027320000	Insulating of coils, windings, or parts thereof
H01F0027330000	Arrangements for noise damping
H01F0027340000	Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
H01F0027360000	Electric or magnetic shields or screens
H01F0027380000	Auxiliary core members; Auxiliary coils or windings
H01F0027400000	Structural association with built-in electric component, e.g. fuse
H01F0027420000	Circuits for modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils (of instrument transformers H01F0040140000;impedance networks H03H)
H01F0029000000	Variable transformers, reactors, or choke coils, for power supply or unspecified use
H01F0029020000	with tappings on coil or winding; with provision for rearrangement or interconnection of windings
H01F0029040000	having provision for tap-changing without interrupting the load current
H01F0029060000	with current collector gliding or rolling on or along winding
H01F0029080000	with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators
H01F0029100000	having movable part of magnetic circuit
H01F0029120000	having movable coil, winding, or part thereof; having movable shield
H01F0029140000	with variable magnetic bias (magnetic amplifiers H03F);;
H01F0031000000	Single-phase transformers for power supply or unspecified use (H01F0036000000 takes precedence);;
H01F0031020000	Auto-transformers
H01F0031040000	having two or more secondary windings, each supplying a separate load, e.g. for power-supply units for radio sets
H01F0031060000	High-leakage transformers, e.g. for arc welding
H01F0031080000	Cascade transformers, e.g. for use with extra high tension
H01F0033000000	Two-phase, three-phase, or polyphase transformers for power supply or unspecified use (H01F0036000000 takes precedence);;
H01F0033020000	for changing the number of phases
H01F0035000000	Transformers for operation with non-linear input/output characteristics for power supply or unspecified use, e.g. for generating harmonics, for changing wave shape (H01F0036000000 takes precedence;with variable characteristics H01F0029140000)
H01F0036000000	Transformers with superconductive windings or with windings operating at cryogenic temperatures (coils with superconductive windings H01F0005080000;electromagnets without armatures and having a superconductive windings H01F0007220000)
H01F0037000000	Reactors or choke coils for power supply or unspecified use (H01F0029000000, H01F0039000000 take precedence);;
H01F0037020000	with non-linear characteristics (H01F0029000000, H01F0039000000 take precedence);;
H01F0039000000	Transformers, inductances, reactors, or choke coils without magnetic cores, for power supply or unspecified use (H01F0036000000 takes precedence);;
H01F0040000000	Instrument transformers (H01F0036000000 takes precedence);;
H01F0040020000	for single-phase ac
H01F0040040000	Voltage transformers
H01F0040060000	Current transformers
H01F0040080000	Combined voltage and current transformers
H01F0040100000	for polyphase ac
H01F0040120000	for dc
H01F0040140000	Circuit arrangements for modifying, or compensating for, electric characteristics
H01F0041000000	Apparatus or processes specially adapted for manufacturing or assembling the devices covered by this subclass
H01F0041020000	for manufacturing cores, coils, or magnets (H01F0041140000 takes precedence;for dynamo-electric machines H02K0015000000)
H01F0041040000	for manufacturing coils
H01F0041060000	Winding (winding in general B65H, e.g. B65H0081000000);;
H01F0041080000	Winding conductors on to or threading conductors through cores or formers which are closed in themselves, e.g. toroids (for interconnecting digital storage elements G11C0005120000);;
H01F0041100000	Connecting leads to windings (making electric connections in general H01R0043000000);;
H01F0041120000	Insulating of windings (of conductors in general H01B0013060000);;
H01F0041140000	for applying thin magnetic films to substrates (covering metals, or materials with metals, in general C23C;manufacturing record carriers G11B0005840000)
H01F0041160000	the material being applied in the form of particles (H01F0041180000 takes precedence);;
H01F0041180000	by cathode sputtering
H01F0041200000	by evaporation
H01F0041220000	Heat treatment; Thermal decomposition; Chemical vapour deposition
H01F0041240000	from liquids
H01F0041260000	using electric currents
H01F0041280000	by liquid phase epitary
H01G	CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, OR LIGHT-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B0003000000);;
H01G0001000000	Details of fixed capacitors (electrolytic capacitors H01G0009000000);;
H01G0001005000	Electrodes
H01G0001010000	Selection of materials for electrodes
H01G0001013000	Form of self-supporting electrodes
H01G0001015000	Form of non-self-supporting electrodes
H01G0001017000	Special provision for self-healing
H01G0001020000	Mounting; Housing; Enclosing; Filling the housing or enclosure
H01G0001030000	Adaptations for mounting on a chassis
H01G0001035000	Adaptations for mounting on a printed-circuit support
H01G0001040000	Distinguishing marks, e.g. colour coding
H01G0001060000	Electrostatic or electromagnetic shielding
H01G0001080000	Cooling arrangements; Heating arrangements; Ventilating arrangements
H01G0001100000	Protection against corrosion
H01G0001110000	Protection against electric or thermal overload (by cooling H01G0001080000);;
H01G0001130000	Arrangements for preventing discharge from edges of electrodes
H01G0001140000	Terminals
H01G0001147000	Electrically connecting two or more electrodes of a stacked capacitor; Electrically connecting the layers of a rolled electrode
H01G0001153000	Leading through the housing, i.e. lead-through
H01G0001160000	Circuits for modifying, or compensating for, electric characteristics of capacitors (impedance networks H03H);;
H01G0004000000	Capacitors with invariable capacitance; Processes of their manufacture (electrolytic capacitors H01G0009000000);;
H01G0004020000	having air, gas, or vacuum as the dielectric
H01G0004040000	having a liquid dielectric
H01G0004060000	having a solid dielectric (layered products in general B32B, e.g. B32B0015000000);;
H01G0004080000	having an inorganic dielectric
H01G0004100000	with metal-oxide dielectric
H01G0004120000	with ceramic dielectric
H01G0004140000	having an organic dielectric
H01G0004160000	of fibrous material, e.g. paper
H01G0004180000	of synthetic material, e.g. derivatives of cellulose (H01G0004160000 takes precedence);;
H01G0004200000	with the dielectric comprising at least two materials
H01G0004220000	impregnated
H01G0004240000	the dielectric being adapted for self-healing
H01G0004260000	Folded capacitors
H01G0004280000	Tubular capacitors
H01G0004300000	Stacked capacitors
H01G0004320000	Wound capacitors
H01G0004340000	with means for correcting the capacitance value
H01G0004360000	with temperature compensation
H01G0004380000	Multiple capacitors, i.e. structural combinations of invariable capacitors
H01G0004400000	Structural combinations of invariable capacitors with other electric elements, the structure mainly consisting of a capacitor, e.g. RC combinations (thin or thick-film circuits H01L0027000000);;
H01G0004420000	Feed-through capacitors or anti-noise capacitors
H01G0005000000	Capacitors in which the capacitance is varied by mechanical means, e.g. by turning a shaft; Processes of their manufacture (capacitors with potential-jump or surface barrier H01L0029000000);;
H01G0005010000	Details
H01G0005015000	Current collectors
H01G0005020000	having air, gas, or vacuum as the dielectric (using displacement of liquid or solid dielectric H01G0005200000, H01G0005260000);;
H01G0005040000	using variation of effective area of electrode
H01G0005060000	due to rotation of flat or substantially flat electrodes
H01G0005080000	becoming active in succession
H01G0005100000	due to rotation of helical electrodes
H01G0005120000	due to rotation of part-cylindrical, conical, or spherical electrodes
H01G0005140000	due to longitudinal movement of electrodes
H01G0005160000	using variation of distance between electrodes
H01G0005180000	due to change in inclination, e.g. by flexing, by spiral wrapping
H01G0005200000	having a liquid dielectric
H01G0005220000	having a solid dielectric
H01G0005240000	with movable electrodes
H01G0005260000	with movable dielectric
H01G0005280000	with one or more electrodes consisting of displaceable liquid or conducting powder, e.g. mercury
H01G0005340000	with temperature compensation
H01G0005360000	with means for correcting the capacitance characteristic
H01G0005380000	Multiple capacitors, e.g. ganged
H01G0007000000	Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture (capacitors with potential-jump or surface barrier H01L0029000000);;
H01G0007020000	Electrets, i.e. having a permanently-polarised dielectric
H01G0007040000	having a dielectric selected for the variation of its permittivity with applied temperature
H01G0007060000	having a dielectric selected for the variation of its permittivity with applied voltage, i.e. ferroelectric capacitors (electrets H01G0007020000);;
H01G0009000000	Electrolytic capacitors, rectifiers, detectors, switching devices, or light-sensitive devices; Processes of their manufacture
H01G0009020000	Diaphragms; Separators; Selection of materials for use as electrolytes or absorbents (electrolytic or electrophoretic processes, apparatus therefor C25;for primary, secondary, or fuel cells H01M)
H01G0009040000	Electrodes
H01G0009050000	consisting of tantalum, niobium, or sintered material; Combinations of such electrodes with solid semi-conductive electrolytes, e.g. manganese dioxide
H01G0009060000	Mounting in containers
H01G0009080000	Containers
H01G0009100000	Sealing, e.g. of lead-in wires
H01G0009120000	Vents or other means allowing expansion
H01G0009140000	Circuits for modifying, or compensating for, electric characteristics of electrolytic capacitors (impedance networks H03H);;
H01G0009160000	specially for use as rectifiers or detectors (H01G0009220000 takes precedence);;
H01G0009180000	Self-interrupters
H01G0009200000	Light-sensitive devices
H01G0009220000	Devices using combined reduction and oxidation, e.g. redox arrangement, solion
H01G0009240000	Processes of manufacture
H01G0013000000	Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups ; H01G0004000000-H01G0009000000
H01G0013020000	Machines for winding capacitors (winding in general B65H);;
H01G0013040000	Drying (in general F26B);;Impregnating
H01G0013060000	with provision for removing metal surfaces
H01H	ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B0007100000;overvoltage protection resistors, resistive arresters H01C0007120000, H01C0008040000; electrolytic self-interrupters H01G0009180000; switching devices of the waveguide type H01P; devices for interrupted current collection H01R0039000000; overvoltage arresters using spark gaps H01T0004000000; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K0017000000)
H01H0001000000	Contacts (liquid contacts H01H0029040000);;
H01H0001020000	characterised by the material thereof
H01H0001040000	Co-operating contacts of different material
H01H0001060000	characterised by the shape or structure of the contact-making surface, e.g. grooved
H01H0001080000	wetted with mercury
H01H0001100000	Laminated contacts with divided contact surface
H01H0001120000	characterised by the manner in which co-operating contacts engage
H01H0001140000	by abutting
H01H0001160000	by rolling; by wrapping; Roller or ball contacts
H01H0001180000	with subsequent sliding
H01H0001200000	Bridging contacts
H01H0001220000	with rigid pivoted member carring the moving contact
H01H0001240000	with resilient mounting
H01H0001260000	with spring blade support
H01H0001280000	Assembly of three or more contact-supporting spring blades
H01H0001300000	within supporting guides
H01H0001320000	Self-aligning contacts
H01H0001340000	with provision for adjusting position of contact relative to its co-operating contact
H01H0001360000	by sliding (by rolling or wrapping H01H0001160000);;
H01H0001380000	Plug-and-socket contacts
H01H0001400000	Contact mounted so that its contact-making surface is flush with adjoining insulation
H01H0001420000	Knife-and-clip contacts
H01H0001440000	with resilient mounting
H01H0001460000	self-aligning contacts
H01H0001480000	with provision for adjusting position of contact relative to its co-operating contact
H01H0001500000	Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
H01H0001520000	Contacts adapted to act as latches
H01H0001540000	by magnetic force
H01H0001560000	Contact arrangements for providing make-beforebreak operation, e.g. for on-load tap-changing
H01H0001580000	Electric connections to or between contacts; Terminals (electric connections in general H01R);;
H01H0001600000	Auxiliary means structurally associated with the switch for cleaning or lubricating contact-making surfaces (cleaning by normal sliding of contacts H01H0001180000, H01H0001360000);;
H01H0001620000	Heating or cooling of contacts
H01H0001640000	Protective enclosures, baffle plates, or screens for contacts (for arc-extinguishing H01H0009300000;for mercury contacts H01H0029040000)
H01H0001660000	Contacts sealed in an evacuated or gas-filled envelope, e.g. magnetic dry-reed contacts
H01H0003000000	Mechanisms for operating contacts (snap-action arrangements H01H0005000000;devices for introducing a predetermined time delay H01H0007000000; thermal actuating or release means H01H0037020000)
H01H0003020000	Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
H01H0003040000	Levers (tumblers H01H0023140000);;
H01H0003060000	Means for securing to shaft of driving mechanism
H01H0003080000	Turn knobs
H01H0003100000	Means for securing to shaft of driving mechanism
H01H0003120000	Push-buttons
H01H0003140000	adapted for operation by a part of the human body other than the hand, e.g. by foot
H01H0003160000	adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift
H01H0003180000	the movement in one direction being intentionally by hand, e.g. for setting automatically cancelled trafficators
H01H0003200000	wherein an auxiliary movement thereof, or of an attachment thereto, is necessary before the main movement is possible or effective, e.g. for unlatching, for coupling
H01H0003220000	Power arrangements internal to the switch for operating the driving mechanism
H01H0003240000	using pneumatic or hydraulic actuator
H01H0003260000	using dynamo-electric motor (for storing energy in a spring motor H01H0003300000);;
H01H0003280000	using electromagnet (for storing energy in a spring motor H01H0003300000;for operating relays H01H0045000000)
H01H0003300000	using spring motor
H01H0003320000	Driving mechanisms, i.e. for transmitting driving force to the contacts (snap-action arrangements H01H0005000000;introducing a predetermined time delay H01H0007000000)
H01H0003340000	using ratchet
H01H0003360000	using belt, chain, or cord
H01H0003380000	using spring or other flexible shaft coupling
H01H0003400000	using friction, toothed, or screw-and-nut gearing
H01H0003420000	using cam or eccentric
H01H0003440000	using Geneva movement
H01H0003460000	using rod or lever linkage, e.g. toggle
H01H0003480000	using lost-motion device
H01H0003500000	with indexing or locating means, e.g. indexing by ball and spring
H01H0003520000	with means to ensure stopping at intermediate operative positions
H01H0003540000	Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts
H01H0003560000	using electromagnetic clutch
H01H0003580000	using friction, toothed, or other mechanical clutch
H01H0003600000	Mechanical arrangements for preventing or damping vibration or shock
H01H0003620000	Lubricating means structurally associated with the switch (for lubricating contact-making surfaces H01H0001600000);;
H01H0005000000	Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
H01H0005020000	Energy stored by the attraction or repulsion of magnetic parts
H01H0005040000	Energy stored by deformation of elastic members (by deformation of bimetallic element in thermally-actuated switches H01H0037540000);;
H01H0005060000	by compression or extension of coil springs
H01H0005080000	one end of spring transmitting movement to the contact member when the other end is moved by the operating part
H01H0005100000	one end of spring being fixedly connected to the stationary or movable part of the switch, and the other end reacting with a movable or stationary rigid member respectively through pins, cams, toothed, or other shaped surfaces
H01H0005120000	having two or more snap-action motions in succession
H01H0005140000	by twisting of torsion members
H01H0005160000	with auxiliary means for temporarily holding parts until torsion member is sufficiently strained
H01H0005180000	by flexing of blade springs
H01H0005200000	single blade moved across dead-centre position
H01H0005220000	blade spring with at least one snap-acting leg and at least one separate contact-carrying or contact-actuating leg
H01H0005240000	having three legs
H01H0005260000	having two or more snap-action motions in succession
H01H0005280000	two separate blade springs forming a toggle
H01H0005300000	by buckling of disc springs
H01H0007000000	Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts (time or time-programme switches H01H0043000000);;
H01H0007020000	with fluid timing means
H01H0007030000	with dash-pots
H01H0007040000	with flies, i.e. fan governors
H01H0007060000	with thermal timing means (thermally-actuated switches H01H0037000000);;
H01H0007080000	with timing by mechanical speed-control devices
H01H0007100000	by escapement
H01H0007120000	mechanical
H01H0007140000	electromagnetic
H01H0007160000	Devices for ensuring operation of the switch at a predetermined point in the ac cycle (circuit arrangements H01H0009560000);;
H01H0009000000	Details of switching devices, not covered by groups  H01H0001000000-H01H0007000000; (casings for switchgear H02B0001080000;casings for electrical apparatus in general H05K0005000000)
H01H0009020000	Bases, casings, or covers (accommodating more than one switch or a switch and another electrical component H02B0001080000);;
H01H0009040000	Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
H01H0009060000	Casing of switch constituted by a handle serving a purpose other than the actuation of the switch, e.g. by the handle of a vacuum cleaner
H01H0009080000	Arrangements to facilitate replacement of switch, e.g. cartridge housing
H01H0009100000	Adaptation for built-in fuses (mounting switch and fuse separately on, or in, common support H02B);;
H01H0009120000	Means for earthing parts of switch not normally conductively connected to the contacts
H01H0009140000	Adaptation for built-in safety spark gaps
H01H0009160000	Indicators for switching condition, e.g. "on" or "off"
H01H0009180000	Distinguishing marks on switches, e.g. for indicating switch location in the dark; Adaptation of switches to receive distinguishing marks
H01H0009200000	Interlocking, locking, or latching mechanisms (contacts adapted to act as latches H01H0001520000;by an auxiliary movement of the operating part or of an attachment thereto H01H0003200000)
H01H0009220000	for interlocking between casing, cover, or protective shutter and mechanism for operating contacts
H01H0009240000	for interlocking two or more parts of the mechanism for operating contacts
H01H0009260000	for interlocking two or more switches (by a detachable member H01H0009280000);;
H01H0009280000	for locking switch parts by a key or equivalent removable member (switches operated by a key H01H0027000000;locking by removable part of two-part coupling device H01R)
H01H0009300000	Means for extinguishing or preventing arc between current-carrying parts
H01H0009320000	Insulating body insertable between contacts
H01H0009340000	Stationary parts for restricting or subdividing the arc, e.g. barrier plate
H01H0009360000	Metal parts
H01H0009380000	Auxiliary contacts on to which the arc is transferred from the main contacts (using arcing-horns H01H0009460000);;
H01H0009400000	Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
H01H0009420000	Impedances connected with contacts
H01H0009440000	using blow-out magnet
H01H0009460000	using arcing horns (using blow-out magnet H01H0009440000;arcing horns per se H01T0004140000)
H01H0009480000	Means for preventing discharge to non-current-carrying parts, e.g. using corona ring
H01H0009500000	Means for detecting the presence of an arc or discharge
H01H0009520000	Cooling of switch parts (cooling of contacts H01H0001620000);;
H01H0009540000	Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
H01H0009560000	for ensuring operation of the switch at a predetermined point in the ac cycle
H01H0011000000	Apparatus or processes specially adapted for the manufacture of electric switches
H01H0011020000	for mercury switches
H01H0011040000	of switch contacts
H01H0011060000	Fixing of contacts to carrier
H01H0013000000	Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch (wherein the operating part is flexible H01H0017000000);;
H01H0013020000	Details
H01H0013040000	Cases; Covers
H01H0013060000	Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
H01H0013080000	Casing of switch constituted by a handle serving a purpose other than the actuation of the switch
H01H0013100000	Bases; Stationary contacts mounted thereon
H01H0013120000	Movable parts; Contacts mounted thereon
H01H0013140000	Operating parts, e.g. push-button
H01H0013160000	adapted for operation by a part of the human body other than the hand, e.g. by foot
H01H0013180000	adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
H01H0013200000	Driving mechanisms
H01H0013220000	acting with snap action (depending upon deformation of elastic members H01H0013260000);;
H01H0013240000	with means for introducing a predetermined time delay
H01H0013260000	Snap-action arrangements depending upon deformation of elastic members
H01H0013280000	using compression or extension of coil springs
H01H0013300000	one end of spring transmitting movement to the contact member when the other end is moved by the operating part
H01H0013320000	one end of spring being fixedly connected to the stationary or movable part of the switch and the other end reacting with a movable or stationary rigid member respectively through pins, cams, toothed, or other shaped surfaces
H01H0013340000	having two or more snap-action motions in succession
H01H0013360000	using flexing of blade springs
H01H0013380000	Single blade moved across dead-centre position
H01H0013400000	Blade spring with at least one snap-acting leg and at least one separate contactcarrying or contact-actuating leg
H01H0013420000	having three legs
H01H0013440000	having two or more snap-action motions in succession
H01H0013460000	two separate blade springs forming a toggle
H01H0013480000	using buckling of disc springs
H01H0013500000	having a single operating member
H01H0013520000	the contact returning to its original state immediately upon removal of operating force, e.g. bell push switch
H01H0013540000	the contact returning to its original state a predetermined time interval after removal of operating force, e.g. for staircase lighting
H01H0013560000	the contact returning to its original state upon the next application of operating force
H01H0013580000	with contact-driving member rotated step-wise in one direction
H01H0013600000	with contact-driving member moved alternately in opposite directions
H01H0013620000	the contact returning to its original state upon manual release of a latch (latch released by second push-button H01H0013680000);;
H01H0013640000	wherein the switch has more than two electrically distinguishable positions, e.g. multi-position push-button switches
H01H0013660000	the operating member having only two positions
H01H0013680000	having two operating members, one for opening and one for closing the same set of contacts (single operating member protruding from different sides of switch casing for alternate pushing upon opposite ends H01H0015220000);;
H01H0013700000	having a plurality of operating members associated with different sets of contacts, e.g. keyboard (keyboards for special applications, see the relevant subclasses or groups, e.g. B41J, G06F0003023000, H04L0015000000, H04L0017000000, H04M0001000000;mounting together a plurality of independent switches H02B)
H01H0013720000	wherein the switch has means for limiting the number of operating members that can concurrently be in the actuated position
H01H0013740000	each contact set returning to its original state only upon actuation of another of the operating members
H01H0013760000	wherein some or all of the operating members actuate different combinations of the contact sets, e.g. ten operating members actuating different combinations of four contact sets
H01H0015000000	Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch
H01H0015020000	Details
H01H0015040000	Stationary parts; Contacts mounted thereon
H01H0015060000	Movable parts; Contacts mounted thereon
H01H0015080000	Contact arrangements for providing make-before-break operation, e.g. for on-load tap-changing
H01H0015100000	Operating parts
H01H0015120000	adapted for operation by a part of the human body other than the hand, e.g. by foot
H01H0015140000	adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
H01H0015160000	Driving mechanisms
H01H0015180000	acting with snap action
H01H0015200000	with means for introducing a predetermined time delay
H01H0015220000	having a single operating part protruding from different sides of switch casing for alternate actuation from opposite ends
H01H0015240000	having a single operating part only protruding from one side of the switch casing for alternate pushing and pulling
H01H0017000000	Switches having flexible operating part adapted only for pulling, e.g. cord, chain
H01H0017020000	Details
H01H0017040000	Stationary parts (guides H01H0017140000);;
H01H0017060000	Movable parts (guides H01H0017140000);;
H01H0017080000	Operating part, e.g. cord
H01H0017100000	adapted for operation by a part of the human body other than the hand, e.g. by foot
H01H0017120000	adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
H01H0017140000	Guiding means for flexible operating part
H01H0017160000	having a single flexible operating part adapted for pulling at one end only
H01H0017180000	secured to a part of the switch driving mechanism that has only angular movement
H01H0017200000	the contact returning to its original state immediately upon removal of operating force
H01H0017220000	the contact returning to its original state upon the next application of operating force
H01H0017240000	secured to a part of the switch driving mechanism that has both angular and rectilinear motion
H01H0017260000	having two flexible operating parts; having a single operating part adapted for pulling at both ends
H01H0017280000	secured to a part or parts of the switch driving mechanism having only rectilinear motion
H01H0017300000	secured to a part or parts of the switch driving mechanism having only angular motion
H01H0019000000	Switches operated by angular displacement of the operating part thereof acted upon directly by a solid body external to the switch, e.g. by a hand, wherein this part may be turned through an unlimited or unspecified angle (rotary current collectors, distributors, or interrupters H01R0039000000);;
H01H0019020000	Details
H01H0019040000	Cases; Covers
H01H0019060000	Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
H01H0019080000	Bases; Stationary contacts mounted thereon
H01H0019100000	Movable parts; Contacts mounted thereon
H01H0019120000	Contact arrangements for providing make-before-break operation, e.g. for on-load tap-changing
H01H0019140000	Operating parts, e.g. turn knob
H01H0019160000	adapted for operation by a part of the human body other than the hand, e.g. by foot
H01H0019180000	adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
H01H0019200000	Driving mechanisms allowing angular displacement of the operating part to be effective in either direction
H01H0019220000	incorporating lost motion
H01H0019240000	acting with snap action
H01H0019260000	with means for introducing a predetermined time delay
H01H0019280000	Driving mechanisms allowing angular displacement of the operating part to be effective or possible in only one direction
H01H0019300000	incorporating lost motion
H01H0019320000	acting with snap action
H01H0019340000	with means for introducing a predetermined time delay
H01H0019360000	the operating part having only two operative positions, e.g. relatively displaced by 180
H01H0019380000	Change-over switches
H01H0019400000	having only axial contact pressure
H01H0019420000	providing more than two electrically-different conditions, e.g. for closing either or both of two circuits
H01H0019440000	having only axial contact pressure
H01H0019460000	the operating part having three operative positions, e.g. off /star/delta
H01H0019480000	having only axial contact pressure
H01H0019500000	the operating part having four operative positions, e.g. off two-in-series/one-only/two-in-parallel
H01H0019520000	having only axial contact pressure
H01H0019540000	the operating part having at least five or an unspecified number of operative positions
H01H0019560000	Angularly-movable actuating part carrying contacts, e.g. drum switch
H01H0019580000	having only axial contact pressure, e.g. disc switch, wafer switch
H01H0019600000	Angularly-movable actuating part carrying no contacts
H01H0019620000	Contacts actuated by radial cams
H01H0019630000	Contacts actuated by axial cams
H01H0019640000	Encased switches adapted for ganged operation when assembled in a line with identical switches, e.g. stacked switches
H01H0021000000	Switches operated by angular displacement of the operating part thereof acted upon directly by a solid body, e.g. by a hand, wherein this part may be turned through a restricted angle only (tumbler switches H01H0023000000);;
H01H0021020000	Details
H01H0021040000	Cases; Covers
H01H0021060000	interlocked with operating mechanism
H01H0021080000	Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
H01H0021100000	Casing of switch constituted by a handle serving a purpose other than the actuation of the switch
H01H0021120000	Bases; Stationary contacts mounted thereon
H01H0021140000	Means for increasing contact pressure
H01H0021160000	Adaptation for built-in fuse
H01H0021180000	Movable parts; Contacts mounted thereon
H01H0021200000	Contact arrangements for providing make-before-break operation, e.g. for on-load tap-changing
H01H0021220000	Operating parts, e.g. handle
H01H0021240000	biased to return to original position upon removal of operating force
H01H0021260000	adapted for operation by a part of the human body other than the hand, e.g. by foot
H01H0021280000	adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
H01H0021300000	not biased to return to original position upon removal of operating force
H01H0021320000	adapted for operation by a part of the human body other than the hand, e.g. by foot
H01H0021340000	adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
H01H0021360000	Driving mechanisms
H01H0021380000	incorporating lost motion
H01H0021400000	having snap action
H01H0021420000	produced by compression or extension of coil spring
H01H0021440000	produced by flexing blade springs
H01H0021460000	with two or more snap-action motions in succession
H01H0021480000	incorporating a ratchet mechanism
H01H0021500000	with indexing or latching means, e.g. indexing by ball and spring; with means to ensure stopping at intermediate operative positions
H01H0021520000	with means for introducing a predetermined time delay
H01H0021540000	Lever switches with blade-type contact co-operating with one or two spring-clip contacts, e.g. knife switch, sectionalisers
H01H0021560000	making contact in one position only
H01H0021580000	Change-over switches without stable intermediate position
H01H0021600000	Change-over switches with stable intermediate position
H01H0021620000	Switches with moving contact sliding over stud contacts
H01H0021640000	with two operative positions, e.g. on/off
H01H0021660000	having only axial contact pressure
H01H0021680000	with three operative positions, e.g. change-over switch with stable intermediate position
H01H0021700000	having only axial contact pressure
H01H0021720000	with four operative positions
H01H0021740000	having only axial contact pressure
H01H0021760000	with at least five or an unspecified number of operative positions, e.g. drum switch
H01H0021780000	having only axial contact pressure, e.g. face-plate switch
H01H0021800000	Switches with angularly-movable actuating part carrying no contacts
H01H0021820000	Contacts actuated by radial cams
H01H0021840000	Contacts actuated by rectilinearly-movable member linked to operating part, e.g. by pin and slot
H01H0021860000	Switches with abutting contact carried by operating part, e.g. telegraph tapping key
H01H0021880000	with intermediate position of rest
H01H0023000000	Tumbler switches, i.e. actuated by digitally rocking a part of the switch in one plane only
H01H0023020000	Details
H01H0023040000	Cases; Covers
H01H0023060000	Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
H01H0023080000	Bases; Stationary contacts mounted thereon
H01H0023100000	Adaptation for built-in fuse
H01H0023120000	Movable parts; Contacts mounted thereon
H01H0023140000	Tumblers
H01H0023160000	Driving mechanisms
H01H0023180000	incorporating lost motion
H01H0023200000	having snap action
H01H0023220000	with means for introducing a predetermined time delay
H01H0023240000	with two operating positions
H01H0023260000	one of which positions is unstable
H01H0023280000	with three operating positions
H01H0023300000	with stable centre position and one or both end positions unstable
H01H0025000000	Switches with compound movement of handle or other operating part
H01H0025040000	Operating part movable angularly in more than one plane, e.g. joy-stick
H01H0025060000	Operating part movable both angularly and rectilinearly, the rectilinear movement being along the axis of angular movement
H01H0027000000	Switches operated by a removable member, e.g. key, plug, plate; Switches operated by setting members according to a single predetermined combination out of several possible settings (locking switch parts to prevent operation H01H0009280000;combined with plug-and-socket connectors H01R; with current-carrying plug H01R0031080000)
H01H0027040000	Insulating plug or plate inserted between normally-closed contacts
H01H0027060000	Key inserted and then turned to effect operation of the switch
H01H0027080000	wherein the key cannot be removed until the switch is returned to its original position
H01H0027100000	Switch operated by setting members according to a single predetermined combination out of several possible settings
H01H0029000000	Switches having at least one liquid contact (solid contacts wetted or soaked with mercury H01H0001080000);;
H01H0029020000	Details
H01H0029040000	Contacts; Containers for liquid contacts
H01H0029060000	Liquid contacts characterised by the material thereof
H01H0029080000	Means for introducing a predetermined time delay
H01H0029100000	by constricting the flow of the contact liquid
H01H0029120000	Operating mechanisms adapted for operation by a part of the human body other than the hand, e.g. by foot
H01H0029140000	Operating mechanisms adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
H01H0029160000	operated by dipping solid contact into stationary contact liquid
H01H0029180000	with level of surface of contact liquid displaced by non-electrical contact-making plunger
H01H0029200000	operated by tilting contact-liquid container (centrifugal mercury switches H01H0029260000);;
H01H0029220000	wherein contact is made and broken between liquid and solid
H01H0029240000	wherein contact is made and broken between liquid and liquid
H01H0029260000	with level of surface of contact liquid displaced by centrifugal action
H01H0029280000	with level of surface of contact liquid displaced by fluid pressure
H01H0029300000	with level of surface of contact liquid displaced by expansion or evaporation thereof
H01H0029320000	with contact made by a liquid jet, e.g. earthing switch with contact made by jet of water (operated by direct electrodynamic action H01H0053000000);;
H01H0031000000	Air-break switches for high tension without arc-extinguishing or arc-preventing means (in combination with high tension or heavy-current switches with arc-extinguishing or arc-preventing means H01H0033000000;switchgear H02B)
H01H0031020000	Details
H01H0031040000	Interlocking mechanisms (for interlocking with high-tension or heavy-current switches having arc-extinguishing or arc-preventing means H01H0033520000);;
H01H0031060000	for interlocking between casing, cover, or protective shutter and mechanism for operating contacts
H01H0031080000	for interlocking two or more parts of the mechanism for operating contacts
H01H0031100000	for interlocking two or more switches (for interlocking with high-tension or heavy-current switches having arc-extinguishing or arc-preventing means H01H0033520000);;
H01H0031120000	Adaptation for built-in fuse
H01H0031140000	with bridging contact that is not electrically connected to either line contact in open position of switch
H01H0031160000	with angularly-movable bridging contact or contact-carrying member
H01H0031180000	actuated through the movement of one or more insulators
H01H0031200000	at least one insulator being rotatable about its own geometrical axis
H01H0031220000	wherein the contact or contacts are rectilinearly movable with respect to the carrying member
H01H0031240000	with rectilinearly-movable bridging contact
H01H0031260000	with movable contact that remains electrically connected to one line in open position of switch
H01H0031280000	with angularly-movable contact
H01H0031300000	actuated-through the movement of one or more insulators
H01H0031320000	with rectilinearly-movable contact
H01H0031340000	with movable contact adapted to engage an overhead transmission line, e.g. for branching
H01H0031360000	Contact moved by pantograph
H01H0033000000	High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
H01H0033020000	Details
H01H0033040000	Means for extinguishing or preventing arc between current-carrying parts (for switches in general H01H0009300000);;
H01H0033060000	Insulating body insertable between contacts
H01H0033080000	Stationary parts for restricting or subdividing the arc, e.g. barrier plate
H01H0033100000	Metal parts
H01H0033120000	Auxiliary contacts on to which the arc is transferred from the main contacts (using arcing horns H01H0033200000);;
H01H0033140000	Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
H01H0033160000	Impedances connected with contacts
H01H0033180000	using blow-out magnet
H01H0033200000	using arcing horns (using blow-out magnet H01H0033180000;arcing horns per se H01T0004140000)
H01H0033220000	Selection of fluids for arc-extinguishing
H01H0033240000	Means for preventing discharge to non-current-carrying parts, e.g. using corona ring
H01H0033260000	Means for detecting the presence of an arc or other discharge
H01H0033280000	Power arrangements internal to the switch for operating the driving mechanism
H01H0033300000	using fluid actuator
H01H0033320000	pneumatic
H01H0033340000	hydraulic
H01H0033360000	using dynamo-electric motor (for storing energy in a spring motor H01H0033400000);;
H01H0033380000	using electromagnet (for storing energy in a spring motor H01H0033400000);;
H01H0033400000	using spring motor
H01H0033420000	Driving mechanisms
H01H0033440000	Devices for ensuring operation of the switch at a predetermined point in the ac cycle (circuit arrangements H01H0033590000);;
H01H0033460000	Interlocking mechanisms
H01H0033480000	for interlocking between casing or cover and mechanism for operating contacts
H01H0033500000	for interlocking two or more parts of the mechanism for operating contacts
H01H0033520000	for interlocking two or more switches
H01H0033530000	Cases (for switchgear H02B0001080000);;Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
H01H0033550000	Oil reservoirs or tanks; Lowering means therefor (associated with withdrawal mechanism for isolation of switch H02B0011080000);;
H01H0033560000	Gas reservoirs
H01H0033570000	Recuperation of liquid or gas
H01H0033575000	Pressure relief devices for normal or emergency use
H01H0033580000	Silencers for suppressing noise of switch operation
H01H0033590000	Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle
H01H0033600000	Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
H01H0033620000	wherein the break is in air at atmospheric pressure, e.g. in open air
H01H0033640000	wherein the brake is in gas (in air at atmospheric pressure H01H0033620000;vacuum switches H01H0033660000)
H01H0033660000	Vacuum switches
H01H0033680000	Liquid-break switches, e.g. oil-break
H01H0033700000	Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
H01H0033720000	having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber
H01H0033730000	wherein the break is in air at atmospheric pressure, e.g. in open air
H01H0033740000	wherein the break is in gas (in air at atmospheric pressure H01H0033730000);;
H01H0033750000	Liquid-break switches, e.g. oil-break
H01H0033760000	wherein arc-extinguishing gas is evolved from stationary parts; Selection of material therefor
H01H0033770000	wherein the break is in air at atmospheric pressure
H01H0033780000	wherein the break is in gas (in air at atmospheric pressure H01H0033770000);;
H01H0033800000	flow of arc-extinguishing fluid from a pressure source being controlled by a valve
H01H0033820000	the fluid being air or gas
H01H0033825000	with closed circuit of air or gas (H01H0033835000 takes precedence);;
H01H0033830000	wherein the contacts are opened by the flow of air or gas
H01H0033835000	with closed circuit of air or gas
H01H0033840000	the fluid being liquid, e.g. oil
H01H0033850000	wherein the contacts are opened by the flow of liquid
H01H0033860000	the flow of arc-extinguishing fluid under pressure from the contact space being controlled by a valve
H01H0033867000	the fluid being air or gas
H01H0033873000	with closed circuit of air or gas
H01H0033880000	the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
H01H0033900000	this movement being effected by, or in conjunction with, the contact-operating mechanism
H01H0033910000	the arc-extinguishing fluid being air or gas
H01H0033915000	with closed circuit of air or gas
H01H0033920000	the arc-extinguishing fluid being liquid, e.g. oil
H01H0033940000	this movement being effected solely due to the pressure caused by the arc itself or by an auxiliary arc
H01H0033950000	the arc-extinguishing fluid being air or gas
H01H0033960000	the arc-extinguishing fluid being liquid, e.g. oil
H01H0033980000	the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow
H01H0033985000	the fluid being air or gas
H01H0033990000	the fluid being liquid
H01H0035000000	Switches operated by change of a physical condition (operated by change of magnetic or electric field H01H0036000000;thermally-actuated switches H01H0037000000; time switches H01H0043000000; relays H01H0045000000-H01H0061000000; sensing elements for providing continuous conversion of a variable into mechanical displacement G01)
H01H0035020000	Switches operated by change of position, inclination, or orientation of the switch itself in relation to gravitational field (tilting mercury container H01H0029200000;change of position due to change of liquid level H01H0035180000)
H01H0035060000	Switches operated by change of speed (operated by change of fluid flow H01H0035240000);;
H01H0035100000	Centrifugal switches (level of mercury displaced by centrifugal action H01H0029260000);;
H01H0035120000	operated by reversal of direction of movement
H01H0035140000	Switches operated by change of acceleration, e.g. by shock or vibration, inertia switch
H01H0035180000	Switches operated by change of liquid level or of liquid density, e.g. float switch (wherein the liquid constitutes a contact of the switch H01H0029000000;by magnet carried on a float H01H0036020000)
H01H0035240000	Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow (wherein the change of pressure is caused by change of temperature H01H0037360000);;
H01H0035260000	Details
H01H0035280000	Compensation for variation of ambient pressure or temperature
H01H0035300000	Means for transmitting pressure to pressure-responsive operating part, e.g. by capsule and capillary tube
H01H0035320000	actuated by bellows
H01H0035340000	actuated by diaphragm
H01H0035360000	actuated by curled flexible tube, e.g. Bourdon tube
H01H0035380000	actuated by piston and cylinder
H01H0035400000	actuated by devices allowing continual flow of fluid, e.g. vane
H01H0035420000	Switches operated by change of humidity
H01H0036000000	Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
H01H0036020000	actuated by movement of a float carrying a magnet
H01H0037000000	Thermally-actuated switches (electrothermal relays operated by electrical input H01H0061000000;protective switches with electrothermal release or actuation H01H0073000000-H01H0083000000)
H01H0037020000	Details
H01H0037040000	Bases; Housings; Mountings
H01H0037060000	to facilitate replacement, e.g. cartridge housing
H01H0037080000	Indicators; Distinguishing marks
H01H0037100000	Compensation for variation of ambient temperature or pressure
H01H0037120000	Means for adjustment of "on" or "off" operating temperature
H01H0037140000	by anticipatory electric heater
H01H0037160000	by varying the proportion of input heat received by the thermal element, e.g. by displacement of a shield
H01H0037180000	by varying bias on the thermal element due to a separate spring
H01H0037200000	by varying the position of the thermal element in relation to switch base or casing
H01H0037220000	by adjustment of a member transmitting motion from the thermal element to contacts or latch
H01H0037240000	by adjustment of position of the movable contact on its driving member
H01H0037260000	by adjustment of abutment for "off" position of the movable contact
H01H0037280000	by adjustment of the position of the fixed contact
H01H0037300000	by varying the position of the contact unit in relation to switch base or casing
H01H0037320000	Thermally-sensitive members (temperature-responsive elements in general G01K);;
H01H0037340000	Means for transmitting heat thereto, e.g. capsule remote from contact member
H01H0037360000	actuated due to expansion or contraction of a fluid with or without vaporisation (the fluid forming a contact of the switch H01H0029040000, H01H0029300000);;
H01H0037380000	with bellows
H01H0037400000	with diaphragm
H01H0037420000	with curled flexible tube, e.g. Bourdon tube
H01H0037440000	with piston and cylinder
H01H0037460000	actuated due to expansion or contraction of a solid (deflection of a bimetallic element H01H0037520000);;
H01H0037480000	with extensible rigid rods or tubes
H01H0037500000	with extensible wires under tension
H01H0037520000	actuated due to deflection of bimetallic element
H01H0037540000	wherein the bimetallic element is inherently snap acting
H01H0037560000	having spirally wound or helically wound bimetallic element
H01H0037580000	actuated due to thermally controlled change of magnetic permeability
H01H0037600000	Means for producing snap action (inherent in bimetallic element H01H0037540000;caused by a magnet H01H0037660000)
H01H0037620000	Means other than thermal means for introducing a predetermined time delay
H01H0037640000	Contacts
H01H0037660000	Magnetic reinforcement of contact pressure; Magnet causing snap action
H01H0037680000	sealed in evacuated or gas-filled tube
H01H0037700000	Resetting means
H01H0037720000	Switches in which the opening movement and the closing movement of a contact are effected respectively by heating and cooling or ; vice versa
H01H0037740000	Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling (for the electrical protection of electric lines or electric apparatus H01H0073000000-H01H0083000000);
H01H0037760000	Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material (fuses H01H0085000000);;
H01H0039000000	Switching devices actuated by an explosion produced within the device and initiated by an electric current
H01H0041000000	Switches providing a selected number of consecutive operations of the contacts by a single manual actuation of the operating part (for telephone communication H04M0001260000);;
H01H0041040000	Switches without means for setting or mechanically storing a multidigit number
H01H0041060000	dial or slide operated
H01H0041080000	keyboard operated
H01H0041100000	Switches with means for setting or mechanically storing a multidigit number
H01H0041120000	dial or slide operated
H01H0041140000	keyboard operated
H01H0043000000	Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operation after the programme is completed (clocks with attached or built-in means operating any device at preselected times or after preselected time intervals G04C0023000000;programme-control systems G05B0019000000)
H01H0043020000	Details
H01H0043040000	Means for time setting
H01H0043060000	comprising separately adjustable parts for each programme step, e.g. with tappets
H01H0043080000	comprising an interchangeable programme part which is common for all programme steps, e.g. with a punched card
H01H0043100000	with timing of actuation of contacts due to a part rotating at substantially constant speed
H01H0043120000	stopping automatically after a single cycle of operation
H01H0043140000	wherein repetition of operation necessitates resetting of time intervals
H01H0043160000	stopping automatically after a predetermined plurality of cycles of operation
H01H0043240000	with timing of actuation of contacts due to a non-rotatably moving part
H01H0043260000	the actuation being produced by a substance flowing due to gravity, e.g. sand, water
H01H0043280000	the actuation being produced by a part, the speed of which is controlled by fluid-pressure means, e.g. by piston and cylinder
H01H0043300000	with timing of actuation of contacts due to thermal action
H01H0043320000	with timing of actuation of contacts due to electrolytic processes; with timing of actuation of contacts due to chemical processes
H01H0045000000	Details of relays (electric circuit arrangements H01H0047000000;of electromagnetic relays H01H0050000000; details of electrically-operated selector switches H01H0063000000)
H01H0045020000	Bases; Cases; Covers (frames for mounting several relays H04Q0001080000, H05K);;
H01H0045040000	Mounting complete relay or separate parts of relay on a base or inside a case
H01H0045060000	having windows; Transparent cases or covers
H01H0045080000	Indicators; Distinguishing marks
H01H0045100000	Electromagnetic or electrostatic shielding (cases H01H0045020000);;
H01H0045120000	Ventilating; Cooling; Heating (for operating electrothermal relays H01H0061013000);;
H01H0045140000	Terminal arrangements
H01H0047000000	Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current (circuit arrangements for electromagnets in general H01F0007180000);;
H01H0047020000	for modifying the operation of the relay
H01H0047040000	for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current
H01H0047060000	by changing number of serially-connected turns or winding
H01H0047080000	by changing number of parallel-connected turns or windings
H01H0047100000	by switching-in or -out impedance external to the relay winding
H01H0047120000	for biasing the electromagnet
H01H0047140000	for differential operation of the relay
H01H0047160000	for conjoint, e.g. additive, operation of the relay
H01H0047180000	for introducing delay in the operation of the relay (short-circuited conducting sleeves, bands, or discs H01H0050460000);;
H01H0047200000	for producing frequency-selective operation of the relay
H01H0047220000	for supplying energising current for relay coil
H01H0047240000	having light-sensitive input
H01H0047260000	having thermo-sensitive input
H01H0047280000	Energising current supplied by discharge tube
H01H0047300000	by gas-filled discharge tube
H01H0047320000	Energising current supplied by semiconductor device
H01H0047340000	Energising current supplied by magnetic amplifier
H01H0047360000	Relay coil or coils forming part of a bridge circuit
H01H0049000000	Apparatus or processes specially adapted to the manufacture of relays or parts thereof
H01H0050000000	Details of electromagnetic relays (electric circuit arrangements H01H0047000000;details of electrically-operated selector switches H01H0063000000)
H01H0050020000	Bases; Cases; Covers (frames for mounting several relays H04Q0001080000, H05K);;
H01H0050040000	Mounting complete relay or separate parts of relay on a base or inside a case
H01H0050060000	having windows; Transparent cases or covers
H01H0050080000	Indicators; Distinguishing marks
H01H0050100000	Electromagnetic or electrostatic shielding (cases H01H0050020000);;
H01H0050120000	Ventilating; Cooling; Heating (for operating electrothermal relays H01H0061013000);;
H01H0050140000	Terminal arrangements
H01H0050160000	Magnetic circuit arrangements (cores, yokes, or armatures in general H01F0003000000;magnets in general H01F0007000000)
H01H0050180000	Movable parts of magnetic circuits, e.g. armature
H01H0050200000	movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil
H01H0050220000	wherein the magnetic circuit is substantially closed
H01H0050240000	Parts rotatable or rockable outside coil
H01H0050260000	Parts movable about a knife edge
H01H0050280000	Parts movable due to bending of a blade spring or reed
H01H0050300000	Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature
H01H0050320000	Latching movable parts mechanically
H01H0050340000	Means for adjusting limits of movement; Mechanical means for adjusting returning force
H01H0050360000	Stationary parts of magnetic circuit, e.g. yoke
H01H0050380000	Part of main magnetic circuit shaped to suppress arcing between the contacts of the relay
H01H0050400000	Branched or mutiple-limb main magnetic circuits
H01H0050420000	Auxiliary magnetic circuits, e.g. for maintaining armature in, or returning armature to, position of rest, for damping or accelerating movement
H01H0050440000	Magnetic coils or windings (circuit arrangements H01H0047000000;in general H01F0005000000)
H01H0050460000	Short-circuited conducting sleeves, bands, or discs
H01H0050540000	Contact arrangements (contacts for switches in general H01H0001000000);;
H01H0050560000	Contact spring sets
H01H0050580000	Driving arrangements structurally associated therewith; Mounting of driving arrangement on armature
H01H0050600000	moving contact being rigidly combined with movable part of magnetic circuit
H01H0050620000	Co-operating movable contacts operated by separate electrical actuating means
H01H0050640000	Driving arrangements between movable part of magnetic circuit and contact (structurally associated with contact spring sets H01H0050580000);;
H01H0050660000	with lost motion
H01H0050680000	with snap action
H01H0050700000	operating contact momentarily during stroke of armature
H01H0050720000	for mercury contact
H01H0050740000	Mechanical means for producing a desired natural frequency of operation of the contacts, e.g. for self-interrupter
H01H0050760000	using reed or blade spring
H01H0050780000	using diaphragm; using stretched wire or ribbon vibrating sideways
H01H0050800000	using torsionally vibrating member, e.g. wire, strip
H01H0050820000	using spring-loaded pivoted inertia member
H01H0050840000	with means for adjustment of frequency or of make-to-break ratio
H01H0050860000	Means for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts (circuit arrangements for introducing delay H01H0047180000;short-circuited conducting sleeves, bands, or discs H01H0050460000)
H01H0050880000	Mechanical means, e.g. dash-pot
H01H0050900000	the delay being effective in both directions of operation
H01H0050920000	Thermal means (inherent in electrothermal relays H01H0061000000);;
H01H0051000000	Electromagnetic relays (relays using the dynamo-electric effect H01H0053000000);;
H01H0051010000	Relays in which the armature is maintained in one position by a permanent magnet and freed by energisation of a coil producing an opposing magnetic field
H01H0051020000	Non-polarised relays (H01H0051010000 takes precedence);;
H01H0051040000	with single armature; with single set of ganged armatures
H01H0051060000	Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity
H01H0051080000	Contacts alternately opened and closed by successive cycles of energisation and de-energisation of the electromagnet, e.g. by use of a ratchet
H01H0051100000	Contacts retained open or closed by a mechanical latch which is controlled by an electromagnet
H01H0051120000	Armature is movable between two limit positions of rest and is moved in both directions due to the energisation of one or the other of two electromagnets without the storage of energy to effect the return movement
H01H0051140000	without intermediate neutral position of rest
H01H0051160000	with intermediate neutral position of rest
H01H0051180000	Armature is rotatable through an unlimited number of revolutions
H01H0051200000	with two or more independent armatures
H01H0051220000	Polarised relays
H01H0051240000	without intermediate neutral position of rest
H01H0051260000	with intermediate neutral position of rest
H01H0051270000	Relays with armature having two stable magnetic states and operated by change from one state to the other
H01H0051280000	Relays having both armature and contacts within a sealed casing outside which the operating coil is located, e.g. contact carried by a magnetic leaf spring or reed (H01H0051270000 takes precedence);;
H01H0051290000	Relays having armature, contacts, and operating coil within a sealed casing (H01H0051270000 takes precedence);;
H01H0051300000	specially adapted for actuation by ac
H01H0051320000	Frequency relays; Mechanically-tuned relays
H01H0051340000	Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts
H01H0051360000	wherein the make-to-break ratio is varied by hand setting or current strength
H01H0053000000	Relays using the dynamo-electric effect, i.e. relays in which contacts are opened or closed due to relative movement of current-carrying conductor and magnetic field caused by force of interaction between them
H01H0053010000	Details
H01H0053015000	Moving coils; Contact-driving arrangements associated therewith
H01H0053020000	Electrodynamic relays, i.e. relays in which the interaction is between two current-carrying conductors
H01H0053040000	Ferrodynamic relays, i.e. relays in which the magnetic field is concentrated in ferromagnetic parts
H01H0053060000	Magnetodynamic relays, i.e. relays in which the magnetic field is produced by a permanent magnet
H01H0053080000	wherein a mercury contact constitutes the current-carrying conductor
H01H0053100000	Induction relays, i.e. relays in which the interaction is between a magnetic field and current induced thereby in a conductor
H01H0053120000	Ferraris relays
H01H0053140000	Contacts actuated by an electric motor through fluid-pressure transmission, e.g. using a motor-driven pump
H01H0055000000	Magnetostrictive relays
H01H0057000000	Electrostrictive relays; Piezo-electric relays
H01H0059000000	Electrostatic relays; Electro-adhesion relays (clutches in general using the Johnson-Rahbek effect H02N0013000000);;
H01H0061000000	Electrothermal relays (thermal switches not operated by electrical input, thermal switches with anticipating electrical input H01H0037000000;thermally-sensitive members H01H0037320000)
H01H0061010000	Details
H01H0061013000	Heating arrangements for operating relays
H01H0061017000	Heating by glow discharge or arc in confined space
H01H0061020000	wherein the thermally-sensitive member is heated indirectly, e.g. resistively, inductively
H01H0061040000	wherein the thermally-sensitive member is only heated directly
H01H0061060000	Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts
H01H0061080000	wherein the make-to-break ratio is varied by hand setting or current strength
H01H0063000000	Details of electrically-operated selector switches (details of relays H01H0045000000);;
H01H0063020000	Contacts; Wipers; Connections thereto
H01H0063040000	Contact-making or contact-breaking wipers; Position indicators therefor
H01H0063060000	Contact banks
H01H0063080000	cylindrical
H01H0063100000	plane
H01H0063120000	Multiplying connections to contact banks, e.g. using ribbon cables
H01H0063140000	without soldering
H01H0063160000	Driving arrangements for multi-position wipers
H01H0063180000	with step-by-step motion of wiper to a selector position
H01H0063200000	using stepping magnet and ratchet
H01H0063220000	using step-by-step electromagnetic drive without ratchet, e.g. self-interrupting driving magnet
H01H0063240000	with continuous motion of wiper until a selected position is reached
H01H0063260000	with an individual clutch-drive from a shaft common to more than one selector switch
H01H0063280000	with an individual motor for each selector switch
H01H0063300000	Pneumatic motor for moving wiper to selected position
H01H0063320000	Spring motor for moving wiper to selected position
H01H0063330000	Constructional details of co-ordinate-type selector switches not having relays at cross-points
H01H0063340000	Bases; Cases; Covers; Mountings (racks for mounting selectors with or without other exchange equipment H04Q0001040000);;Mounting of fuses on selector switch
H01H0063360000	Circuit arrangements for ensuring correct or desired operation and not adapted to a particular application of the selector switch
H01H0063380000	for multi-position wiper switches
H01H0063400000	for multi-position switches without wipers
H01H0063420000	for co-ordinate-type selector switches not having relays at cross-points
H01H0065000000	Apparatus or processes specially adapted to the manufacture of selector switches or parts thereof
H01H0067000000	Electrically-operated selector switches (details thereof H01H0063000000;selecting per se H04Q)
H01H0067020000	Multi-position wiper switches
H01H0067040000	having wipers movable only in one direction for purpose of selection
H01H0067060000	Rotary switches, i.e. having angularly movable wipers
H01H0067080000	with wiper selection
H01H0067100000	with coarse and fine positioning of wipers
H01H0067120000	Linear-motion switches
H01H0067140000	having wipers movable in two mutually perpendicular directions for purpose of selection
H01H0067160000	one motion being rotary and the other being parallel to the axis of rotation, e.g. Strowger or "up and around" switches
H01H0067180000	one motion being rotary and the other being perpendicular to the axis of rotation, e.g. "round and in" switches
H01H0067200000	both motions being linear
H01H0067220000	Switches without multi-position wipers
H01H0067240000	Co-ordinate-type relay switches having an individual electromagnet at each cross-point
H01H0067260000	Co-ordinate-type selector switches not having relays at cross-points but involving mechanical movement, e.g. cross-bar switch, code-bar switch
H01H0067300000	Co-ordinate-type selector switches with field of co-ordinate coil acting directly upon magnetic leaf spring or reed-type contact member
H01H0067320000	having a multiplicity of interdependent armatures operated in succession by a single coil and each controlling one contact or set of contacts, e.g. counting relay
H01H0069000000	Apparatus or processes for the manufacture of emergency protective devices (manufacture of switches in general H01H0011000000;manufacture of relays in general H01H0049000000)
H01H0069010000	for calibrating or setting of devices to function under predetermined conditions (measuring electric values G01R);;
H01H0069020000	Manufacture of fuses
H01H0071000000	Details of the protective switches or relays covered by groups ; H01H0073000000-H01H0083000000
H01H0071020000	Housings; Casings; Bases; Mountings
H01H0071040000	Means for indicating condition of the switching device
H01H0071060000	Distinguishing marks, e.g. colour coding
H01H0071080000	Terminals; Connections (in general H01R);;
H01H0071100000	Operating or release mechanisms
H01H0071120000	Automatic release mechanisms with or without manual release
H01H0071140000	Electrothermal mechanisms
H01H0071160000	with bimetal element
H01H0071180000	with expanding rod, strip, or wire
H01H0071200000	with fusible mass
H01H0071220000	with compensation for variation of ambient temperature
H01H0071240000	Electromagnetic mechanisms
H01H0071260000	with windings acting in opposition
H01H0071280000	with windings acting in conjunction
H01H0071300000	having additional short-circuited winding
H01H0071320000	having permanently magnetised part
H01H0071340000	having two or more armatures controlled by a common winding
H01H0071360000	frequency selective
H01H0071380000	wherein the magnet coil also acts as arc blow-out device
H01H0071400000	Combined electrothermal and electromagnetic mechanisms
H01H0071420000	Induction-motor, induced-current, or electrodynamic release mechanisms
H01H0071430000	Electrodynamic release mechanisms
H01H0071440000	having means for introducing a predetermined time delay (by short-circuited winding H01H0071300000;by additional armature H01H0071340000)
H01H0071460000	having means for operating auxiliary contacts additional to the main contacts
H01H0071480000	with provision for short-circuiting the electrical input to the release mechanism after release of the switch, e.g. for protection of heating wire
H01H0071500000	Manual reset mechanisms
H01H0071520000	actuated by lever
H01H0071540000	actuated by tumbler
H01H0071560000	actuated by rotatable knob or wheel
H01H0071580000	actuated by push-button, pull-knob, or slide
H01H0071600000	actuated by closure of switch casing
H01H0071620000	with means for preventing resetting while abnormal condition persists, e.g. loose handle arrangement
H01H0071640000	incorporating toggle linkage
H01H0071660000	Power reset mechanisms
H01H0071680000	actuated by electromagnet
H01H0071700000	actuated by electric motor
H01H0071720000	actuated automatically a limited number of times
H01H0071740000	Means for adjusting the conditions under which the device will function to provide protection
H01H0073000000	Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
H01H0073020000	Details
H01H0073040000	Contacts
H01H0073060000	Housings; Casings; Bases; Mountings
H01H0073080000	Plug-in housings
H01H0073100000	Cartridge housings, e.g. screw-in housing
H01H0073120000	Means for indicating condition of the switch
H01H0073140000	Indicating lamp structurally associated with the switch
H01H0073160000	Distinguishing marks, e.g. colour coding
H01H0073180000	Means for extinguishing or suppressing arc
H01H0073200000	Terminals; Connections (in general H01R);;
H01H0073220000	having electrothermal release and no other automatic release (cartridge type H01H0073620000);;
H01H0073240000	reset by lever
H01H0073260000	reset by tumbler
H01H0073280000	reset by rotatable knob or wheel
H01H0073300000	reset by push-button, pull-knob, or slide
H01H0073320000	reset by closure of switch casing
H01H0073340000	reset action requiring replacement or reconditioning of a fusible or explosive part
H01H0073360000	having electromagnetic release and no other automatic release (cartridge type H01H0073640000);;
H01H0073380000	reset by lever
H01H0073400000	reset by tumbler
H01H0073420000	reset by rotatable knob or wheel
H01H0073440000	reset by push-button, pull-knob, or slide
H01H0073460000	reset by closure of switch casing
H01H0073480000	having both electrothermal and electromagnetic automatic release (cartridge type H01H0073660000);;
H01H0073500000	reset by lever
H01H0073520000	reset by tumbler
H01H0073540000	reset by rotatable knob or wheel
H01H0073560000	reset by push-button, pull-knob, or slide
H01H0073580000	reset by closure of switch casing
H01H0073600000	cartridge type, e.g. screw-in cartridge
H01H0073620000	having only electrothermal release
H01H0073640000	having only electromagnetic release
H01H0073660000	having combined electrothermal and electromagnetic release
H01H0075000000	Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of power reset mechanism
H01H0075020000	Details
H01H0075040000	Reset mechanisms for automatically reclosing a limited number of times (circuit arrangements H02H0003060000);;
H01H0075060000	effecting one reclosing action only
H01H0075080000	having only electrothermal release
H01H0075100000	having only electromagnetic release
H01H0075120000	having combined electrothermal and electromagnetic release
H01H0077000000	Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting (H01H0073000000, H01H0075000000 take precedence);;
H01H0077020000	in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
H01H0077040000	with electrothermal opening
H01H0077060000	with electromagnetic opening
H01H0077080000	retained closed by permanent or remanent magnetism and opened by demagnetising current
H01H0077100000	with electrodynamic opening
H01H0079000000	Protective switches in which excess current causes the closing of contacts, e.g. for short-circuiting the apparatus to be protected
H01H0081000000	Protective switches in which contacts are normally closed but are repeatedly opened and reclosed as long as a condition causing excess current persists, e.g. for current limiting
H01H0081020000	electrothermally-operated
H01H0081040000	electromagnetically-operated
H01H0083000000	Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
H01H0083020000	operated by earth fault currents (H01H0083140000 takes precedence);;
H01H0083040000	with testing means for indicating the ability of the switch or relay to function properly
H01H0083060000	operated by current falling below a predetermined value
H01H0083080000	operated by reversal of dc
H01H0083100000	operated by excess voltage, e.g. for lightning protection
H01H0083120000	operated by voltage falling below a predetermined value, e.g. for no-volt protection
H01H0083140000	operated by unbalance of two or more currents or voltages, e.g. for differential protection
H01H0083160000	operated by abnormal ratio of voltage and current, e.g. distance relay
H01H0083180000	operated by abnormal product of, or abnormal phase angle between, voltage and current, e.g. directional relay
H01H0083200000	operated by excess current as well as by some other abnormal electrical condition
H01H0083220000	the other condition being unbalance of two or more currents or voltages
H01H0085000000	Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive (switches actuated by melting of fusible material H01H0037760000;automatic release of protective switches due to fusion of a mass H01H0073000000-H01H0083000000; disposition or arrangement of fuses on switchboards H02B0001180000; distribution fuses H02B0009000000)
H01H0085020000	Details (electrical connections in general H01R);;
H01H0085040000	Fuses, i.e. expandable parts of the protective device
H01H0085060000	characterised by the fusible material
H01H0085080000	characterised by the shape of the fusible member
H01H0085100000	with constriction for localised fusing
H01H0085120000	having two or more separate fusible members in parallel
H01H0085140000	Insulating member carrying the fusible member and necessitating replacement therewith after blowing of fuse, e.g. cartridge
H01H0085160000	Contacts on the insulating member, e.g. cap; Fastening of fusible member to these contacts
H01H0085180000	Cartridge fillings, e.g. powder
H01H0085200000	Bases (holders for connectors in general H01R);;
H01H0085220000	Intermediate or auxiliary parts for carrying, holding, or retaining fuse, co-operating with base or fixed holder, and removable therefrom for renewing the fuse
H01H0085240000	Means for preventing insertion of incorrect fuse
H01H0085260000	Magazine arrangements
H01H0085280000	effecting automatic replacement
H01H0085300000	Means for indicating condition of fuse
H01H0085320000	Indicating lamp structurally associated with the protective device
H01H0085340000	Distinguishing marks, e.g. colour coding
H01H0085360000	Means for applying mechanical tension to fusible member
H01H0085380000	Means for extinguishing or suppressing arc (by powder filling H01H0085180000;by mechanical tension applied to fusible member H01H0085360000)
H01H0085400000	using an arc-extinguishing liquid (characterised by the composition of the liquid H01H0033220000);;
H01H0085420000	using an arc-extinguishing gas (characterised by the composition of the gas H01H0033220000);;
H01H0085440000	Structural association with spark-gap arrester
H01H0085460000	Circuit arrangements not adapted to a particular application of the protective device
H01H0085480000	Protective devices wherein the fuse is carried or held directly by the base
H01H0085500000	the fuse having contacts at opposite ends for co-operation with the base
H01H0085520000	the fuse being adapted for screwing into the base
H01H0085540000	Protective devices wherein the fuse is carried, held, or retained by an intermediate or auxiliary part removable from the base, or used as sectionalisers
H01H0085560000	the intermediate or auxiliary part having side contacts for plugging into the base, e.g. bridge-carrier type
H01H0085580000	with intermediate auxiliary part and base shaped to interfit and thereby enclose the fuse
H01H0085600000	the intermediate or auxiliary part having contacts at opposite ends for co-operation with the base
H01H0085620000	the intermediate or auxiliary part being adapted for screwing into the base
H01H0087000000	Protective devices in which a current flowing through a liquid or solid is interrupted by the evaporation of the liquid or by the melting and evaporation of the solid when the current becomes excessive, the circuit continuity being reestablished on cooling
H01J	ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T;arc lamps with consumable electrodes H05B; particle accelerators H05H)
H01J0001000000	Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps (details of electron-optical arrangements or of ion traps H01J0003000000);;
H01J0001020000	Main electrodes
H01J0001040000	Liquid electrodes, e.g. liquid cathode
H01J0001050000	characterised by material
H01J0001060000	Containers for liquid-pool electrodes; Arrangement or mounting thereof
H01J0001080000	Positioning or moving the cathode spot on the surface of a liquid-pool cathode
H01J0001100000	Cooling, heating, circulating, filtering, or controlling level of liquid in a liquid-pool electrode
H01J0001120000	Cathodes having mercury or liquid alkali metal deposited on the cathode surface during operation of the tube
H01J0001130000	Solid thermionic cathodes
H01J0001140000	characterised by the material
H01J0001150000	Cathodes heated directly by an electric current
H01J0001160000	characterised by the shape
H01J0001180000	Supports; Vibration-damping arrangements
H01J0001200000	Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
H01J0001220000	Heaters (filaments for incandescent lamps H01K0001020000);;
H01J0001240000	Insulating layer or body located between heater and emissive material
H01J0001260000	Supports for the emissive material
H01J0001280000	Dispenser-type cathodes, e.g. L-cathode
H01J0001300000	Cold cathodes, e.g. field-emissive cathode
H01J0001320000	Secondary-electron-emitting electrodes (H01J0001350000 takes precedence;luminescent screens H01J0001620000; charge-storage screens in general H01J0001780000; charge-storage screens using secondary emission for image tubes H01J0029410000; dynodes for secondary-emission tubes H01J0043100000; secondary-emission detectors for measurement of nuclear or X-radiation G01T0001280000)
H01J0001340000	Photo-emissive cathodes (H01J0001350000 takes precedence;photoelectric screens H01J0001780000)
H01J0001350000	Electrodes exhibiting both secondary emission and photo-emission
H01J0001360000	Solid anodes; Solid auxiliary anodes for maintaining a discharge
H01J0001380000	characterised by the material
H01J0001400000	forming part of the envelope of the tube or lamp
H01J0001420000	Cooling of anodes (cooling rotary anodes H01J0001440000);;Heating of anodes
H01J0001440000	Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes
H01J0001460000	Control electrodes, e.g. grid (for igniting arrangements H01J0007300000);;Auxiliary electrodes (auxiliary anodes for maintaining a discharge H01J0001360000);;
H01J0001480000	characterised by the material
H01J0001500000	Magnetic means for controlling the discharge
H01J0001520000	Screens for shielding (screens acting as control electrodes H01J0001460000);;Guides for influencing the discharge; Masks interposed in the electron stream
H01J0001530000	Electrodes intimately associated with a screen on or from which an image or pattern is formed, picked-up, converted, or stored
H01J0001540000	Screens on or from which an image or pattern is formed, picked-up, converted, or stored; Luminescent coatings on vessels
H01J0001560000	acting as light valves by shutter operation, e.g. for eidophor
H01J0001580000	acting by discolouration, e.g. halide screen
H01J0001600000	Incandescent screens
H01J0001620000	Luminescent screens; Selection of materials for luminescent coatings on vessels
H01J0001630000	characterised by the luminescent material (luminescent materials C09K0011000000);;
H01J0001640000	characterised by the binder or adhesive for securing the luminescent material to its support
H01J0001660000	Supports for luminescent material (vessels H01J0005020000);;
H01J0001680000	with superimposed luminescent layers
H01J0001700000	with protective, conductive, or reflective layers
H01J0001720000	with luminescent material discontinuously arranged, e.g. in dots or lines
H01J0001740000	with adjacent dots or lines of different luminescent material
H01J0001760000	provided with permanent marks or references
H01J0001780000	Photoelectric screens; Charge-storage screens
H01J0001880000	Mounting, supporting, spacing, or insulating of electrodes or of electrode assemblies
H01J0001900000	Insulation between electrodes or supports within the vacuum space (leading-in conductors H01J0005460000);;
H01J0001920000	Mountings for the electrode assembly as a whole
H01J0001940000	Mountings for individual electrodes (for directly-heated cathodes H01J0001150000);;
H01J0001960000	Spacing members extending to the envelope
H01J0001980000	without fixed connection between spacing member and envelope
H01J0003000000	Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
H01J0003020000	Electron guns
H01J0003040000	Ion guns
H01J0003060000	two or more guns being arranged in a single vacuum space, e.g. for plural-ray tubes (H01J0003070000 takes precedence);;
H01J0003070000	Arrangements for controlling convergence of a plurality of beams
H01J0003080000	Arrangements for controlling intensity of ray or beam (H01J0003020000, H01J0003040000 take precedence);;
H01J0003100000	Arrangements for centering ray or beam (H01J0003020000, H01J0003040000 take precedence);;
H01J0003120000	Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses (H01J0003020000, H01J0003040000 take precedence);;
H01J0003140000	Arrangements for focusing or reflecting ray or beam (H01J0003020000, H01J0003040000 take precedence);;
H01J0003160000	Mirrors
H01J0003180000	Electrostatic lenses
H01J0003200000	Magnetic lenses
H01J0003220000	using electromagnetic means only
H01J0003240000	using permanent magnets only
H01J0003260000	Arrangements for deflecting ray or beam (circuit arrangements for producing sawtooth pulses or other deflecting voltages or currents H03K);;
H01J0003280000	along one straight line or along two perpendicular straight lines
H01J0003300000	by electric fields only
H01J0003320000	by magnetic fields only
H01J0003340000	along a circle, spiral, or rotating radial line
H01J0003360000	Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration
H01J0003380000	Mounting, supporting, spacing, or insulating electron-optical or ion-optical arrangements
H01J0003400000	Traps for removing or diverting unwanted particles, e.g. negative ions, fringing electrons; Arrangements for velocity or mass selection
H01J0005000000	Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
H01J0005020000	Vessels; Containers; Shields associated therewith; Vacuum locks
H01J0005030000	Arrangements for preventing or mitigating effects of implosion of vessels or containers
H01J0005040000	Vessels or containers characterised by the material thereof (selection of the material of the coating H01J0005080000);;
H01J0005060000	Vessels or containers specially adapted for operation at high tension, e.g. by improved potential distribution over surface of vessel
H01J0005080000	provided with coatings on the walls thereof; Selection of materials for the coatings (luminescent coatings H01J0001620000);;
H01J0005100000	on internal surfaces
H01J0005120000	Double-wall vessels or containers
H01J0005140000	Dismountable vessels or containers, e.g. for replacing cathode heater
H01J0005160000	Optical or photographic arrangements structurally combined with the vessel (luminescent coatings H01J0001620000);;
H01J0005180000	Windows permeable to X-rays, gamma-rays, or particles
H01J0005200000	Seals between parts of vessels
H01J0005220000	Vacuum-tight joints between parts of vessel
H01J0005240000	between insulating parts of vessel
H01J0005260000	between insulating and conductive parts of vessel
H01J0005280000	between conductive parts of vessel
H01J0005300000	using packing material, e.g. sealing liquid or elastic insert
H01J0005320000	Seals for leading-in conductors
H01J0005340000	for an individual conductor (pinched-stem seals H01J0005380000;end-disc seals H01J0005400000; annular seals H01J0005440000)
H01J0005360000	using intermediate part
H01J0005380000	Pinched-stem or analogous seals
H01J0005400000	End-disc seals, e.g. flat header
H01J0005420000	using intermediate part
H01J0005440000	Annular seals disposed between the ends of the vessel
H01J0005460000	Leading-in conductors
H01J0005480000	Means forming part of the tube or lamp for the purpose of supporting it (asociated with electrical connecting means H01J0005500000);;
H01J0005500000	Means forming part of the tube or lamp for the purpose of providing electrical connection to it (electric coupling devices comprising a holder adapted for supporting a tube or lamp and not forming part of the tube or lamp H01R0033000000);;
H01J0005520000	directly applied to, or forming part of, the vessel
H01J0005540000	supported by a separate part, e.g. base
H01J0005560000	Shape of the separate part
H01J0005580000	Means for fastening the separate part to the vessel, e.g. by cement
H01J0005600000	for fastening by mechanical means
H01J0005620000	Connection of wires protruding from the vessel to connectors carried by the separate part
H01J0007000000	Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps
H01J0007020000	Selection of substances for gas fillings; Specified operating pressure or temperature (radioactive fillings H01J0007400000);;
H01J0007040000	having one or more carbon compounds as the principal constituent
H01J0007060000	having helium, argon, neon, krypton, or xenon as the principal constituent
H01J0007080000	having a metallic vapour as the principal constituent
H01J0007100000	mercury vapour
H01J0007120000	vapour of an alkali metal
H01J0007140000	Means for obtaining or maintaining the desired pressure within the vessel
H01J0007160000	Means for permitting pumping during operation of the tube or lamp
H01J0007180000	Means for absorbing or adsorbing gas, e.g. by gettering
H01J0007200000	Means for producing, introducing, or replenishing gas or vapour during operation of the tube or lamp
H01J0007220000	Tubulations therefor, e.g. for exhausting; Closures therefor
H01J0007240000	Cooling arrangements (for main electrodes H01J0001020000);;Heating arrangements (for main electrodes H01J0001020000);;Means for circulating gas or vapour within the discharge space
H01J0007260000	by flow of fluid through passages associated with tube or lamp
H01J0007280000	by latent heat or evaporation of cooling liquid
H01J0007300000	Igniting arrangements (circuit arrangements H02M0001020000, H05B);;
H01J0007320000	having resistive or capacitative igniter
H01J0007340000	having resistive igniter only
H01J0007360000	Igniting by movement of a solid electrode
H01J0007380000	Igniting by movement of vessel as a whole, e.g. tilting
H01J0007400000	Igniting by associated radioactive materials or fillings
H01J0007420000	Means structurally associated with the tube or lamp for indicating defects or previous use
H01J0007440000	One or more circuit elements structurally associated with the tube or lamp
H01J0007460000	Structurally associated resonator having distributed inductance and capacitance
H01J0009000000	Apparatus or processes specially adapted to the manufacture of electric discharge tubes, discharge lamps, or parts thereof (manufacture of vessels or containers from metal B21, e.g. B21D0051000000, from glass C03B);;
H01J0009020000	Manufacture of electrodes or electrode systems
H01J0009040000	of thermionic cathodes
H01J0009060000	Machines therefor
H01J0009080000	Manufacture of heaters for indirectly-heated cathodes
H01J0009100000	Machines therefor
H01J0009120000	of photo-emissive cathodes; of secondaryemission electrodes
H01J0009140000	of non-emitting electrodes
H01J0009160000	Machines for making wire grids
H01J0009180000	Assembling together the component parts of electrode systems
H01J0009200000	Manufacture of screens on or from which an image or pattern is formed, picked-up, converted or stored; Applying coatings to the vessel
H01J0009220000	Applying luminescent coatings
H01J0009227000	with luminescent material discontinuously arranged, e.g. in dots or lines
H01J0009233000	Manufacture of photoelectric screens or charge-storage screens
H01J0009236000	Manufacture of magnetic deflecting devices for cathode-ray tubes (manufacturing coils for transformers, inductances, reactors or choke coils H01F0041040000);;
H01J0009240000	Manufacture or joining of vessels, leading-in conductors, or bases
H01J0009260000	Sealing together parts of vessels
H01J0009280000	Manufacture of leading-in conductors
H01J0009300000	Manufacture of bases
H01J0009320000	Sealing leading-in conductors
H01J0009340000	Joining base to vessel
H01J0009360000	Joining connectors to internal electrode system
H01J0009380000	Exhausting, degassing, filling, or cleaning vessels
H01J0009385000	Exhausting vessels
H01J0009390000	Degassing vessels
H01J0009395000	Filling vessels
H01J0009400000	Closing vessels
H01J0009420000	Measurement or testing during manufacture
H01J0009440000	Factory adjustment of completed discharge tubes or lamps to comply with desired tolerances
H01J0009460000	Machines having sequentially-arranged operating stations
H01J0009480000	with automatic transfer of workpieces between operating stations
H01J0009500000	Repairing or regenerating used or defective discharge tubes or lamps
H01J0011000000	Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel (lamps H01J0065000000);;
H01J0011020000	Details, e.g. gas filling, shape of vessel
H01J0011040000	Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
H01J0013000000	Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes (lamps H01J0061000000);;
H01J0013020000	Details
H01J0013040000	Main electrodes; Auxiliary anodes
H01J0013060000	Chathodes
H01J0013080000	characterised by the material
H01J0013100000	Containers for the liquid pool; Arrangement or mounting thereof
H01J0013120000	Positioning or moving the cathode spot on the surface of the pool
H01J0013140000	Cooling, heating, circulating, filtering, or controlling level of the liquid
H01J0013160000	Anodes; Auxiliary anodes for maintaining the discharge (screens H01J0013220000);;
H01J0013180000	Cooling or heating of anodes
H01J0013200000	Control electrodes, e.g. grid (for igniting arrangements H01J0013340000);;
H01J0013220000	Screens, e.g. for preventing or eliminating arcing-back
H01J0013240000	Vessels; Containers
H01J0013260000	Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
H01J0013280000	Selection of substances for gas filling; Means for obtaining or maintaining the desired pressure within the tube
H01J0013300000	Means for permitting pumping during operation of the tube
H01J0013320000	Cooling arrangements; Heating arrangements (for cathodes H01J0013140000;for anodes H01J0013180000)
H01J0013340000	Igniting arrangements (circuit arrangements H02M0001020000);;
H01J0013360000	having resistive or capacitative igniter
H01J0013380000	having resistive igniter only
H01J0013400000	Igniting by movement of a solid electrode
H01J0013420000	Igniting by movement of vessel as a whole, e.g. tilting
H01J0013440000	Devices for preventing or eliminating arcing-back (screens therefor H01J0013220000);;
H01J0013460000	One or more circuit elements structurally associated with the tube
H01J0013480000	Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
H01J0013500000	Tubes having a single main anode
H01J0013520000	with control by one or more intermediate control electrodes
H01J0013540000	with control by igniter, e.g. single-anode ignitron
H01J0013560000	Tubes having two or more main anodes
H01J0013580000	with control by one or more intermediate control electrodes
H01J0015000000	Gas-filled discharge tubes with gaseous cathodes, e.g. plasma cathode (lamps H01J0061620000);;
H01J0015020000	Details, e.g. electrode, gas filling, shape of vessel
H01J0015040000	Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
H01J0017000000	Gas-filled discharge tubes with solid cathode (H01J0025000000, H01J0027000000, H01J0031000000-H01J0041000000;  take precedence;gas or vapour discharge lamps H01J0061000000; gas filled spark gaps H01T; Marx converters H02M0007260000; tubes for generating potential differences by charges carried in a gas stream H02N)
H01J0017020000	Details
H01J0017040000	Electrodes; Screens
H01J0017060000	Cathodes
H01J0017080000	having mercury or liquid alkali metal deposited on the cathode surface during operation of the tube
H01J0017100000	Anodes
H01J0017120000	Control electrodes
H01J0017140000	Magnetic means for controlling the discharge
H01J0017160000	Vessels; Containers
H01J0017180000	Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
H01J0017200000	Selection of substances for gas fillings; Specified operating pressure or temperature (radioactive fillings H01J0017320000);;
H01J0017220000	Means for obtaining or maintaining the desired pressure within the tube
H01J0017240000	Means for absorbing or adsorbing gas, e.g. by gettering
H01J0017260000	Means for producing, introducing, or replenishing gas or vapour during operation of the tube
H01J0017280000	Cooling arrangements
H01J0017300000	Igniting arrangements
H01J0017320000	Igniting by associated radioactive materials or fillings
H01J0017340000	One or more circuit elements structurally associated with the tube
H01J0017360000	Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
H01J0017380000	Cold-cathode tubes (TR boxes H01J0017640000);;
H01J0017400000	with one cathode and one anode, e.g. glow tube, tuning-indicator glow tube, voltage-stabiliser tube, voltage-indicator tube (cathode-glow lamps H01J0061640000);;
H01J0017420000	having one or more probe electrodes, e.g. for potential dividing
H01J0017440000	having one or more control electrodes
H01J0017460000	for preventing and then permitting ignition, but thereafter having no control
H01J0017480000	with more than one cathode or anode, e.g. sequence-discharge tube, counting tube, dekatron
H01J0017490000	Display panels, e.g. with crossed electrodes (gas-discharge-type indicating arrangements effected by the combination of a number of individual lamps G09F0009313000);;
H01J0017500000	Thermionic-cathode tubes (TR boxes H01J0017640000);;
H01J0017520000	with one cathode and one anode
H01J0017540000	having one or more control electrodes
H01J0017560000	for preventing and then permitting ignition, but thereafter having no control
H01J0017580000	with more than one cathode or anode
H01J0017600000	the discharge paths priming each other in a predetermined sequence, e.g. counting tube
H01J0017620000	with independent discharge paths controlled by intermediate electrodes, e.g. polyphase rectifier
H01J0017640000	Tubes specially designed for switching or modulating in a waveguide, e.g. TR box
H01J0019000000	Details of vacuum tubes of the types covered by group ; H01J0021000000
H01J0019020000	Electron-emitting electrodes; Cathodes
H01J0019040000	Thermionic cathodes
H01J0019060000	characterised by the material
H01J0019080000	Cathodes heated directly by an electric current
H01J0019100000	characterised by the shape
H01J0019120000	Supports; Vibration-damping arrangements
H01J0019140000	Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
H01J0019160000	Heaters (filaments for incandescent lamps H01K0001020000);;
H01J0019180000	Insulating layer or body located between heater and emissive material
H01J0019200000	Supports for the emissive material
H01J0019220000	Dispenser-type cathodes, e.g. L-cathode
H01J0019240000	Cold cathodes, e.g. field-emissive cathode
H01J0019280000	Non-electron-emitting electrodes; Screens
H01J0019300000	characterised by the material
H01J0019320000	Anodes
H01J0019340000	forming part of the envelope
H01J0019360000	Cooling of anodes
H01J0019380000	Control electrodes, e.g. grid
H01J0019400000	Screens for shielding (screens acting as control electrodes H01J0019380000);;
H01J0019420000	Mounting, supporting, spacing, or insulating of electrodes or of electrode assemblies
H01J0019440000	Insulation between electrodes or supports within the vacuum space (leading-in conductors H01J0019620000);;
H01J0019460000	Mountings for the electrode assembly as a whole
H01J0019480000	Mountings for individual electrodes (for directly-heated cathodes H01J0019120000);;
H01J0019500000	Spacing members extending to the envelope
H01J0019520000	without fixed connection between spacing member and envelope
H01J0019540000	Vessels; Containers; Shields associated therewith
H01J0019560000	characterised by the material of the vessel or container
H01J0019570000	provided with coatings on the walls thereof; Selection of materials for the coatings
H01J0019580000	Seals between parts of vessels
H01J0019600000	Seals for leading-in conductors
H01J0019620000	Leading-in conductors
H01J0019640000	Means forming part of the tube for the purpose of supporting it (associated with electrical connecting means H01J0019660000);;
H01J0019660000	Means forming part of the tube for the purpose of providing electrical connection to it (construction of connectors H01R);;
H01J0019680000	Specified gas introduced into the tube at low pressure, e.g. for reducing or influencing space charge
H01J0019700000	Means for obtaining or maintaining the vacuum, e.g. by gettering
H01J0019720000	Tubulations therefor, e.g. for exhausting; Closures therefor
H01J0019740000	Cooling arrangements (cooling of anodes H01J0019360000);;
H01J0019760000	Means structurally associated with the tube for indicating defects or previous use
H01J0019780000	One or more circuit elements structurally associated with the tube
H01J0019800000	Structurally associated resonator having distributed inductance and capacitance
H01J0019820000	Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
H01J0021000000	Vacuum tubes (H01J0025000000, H01J0031000000-H01J0040000000, H01J0043000000, H01J0047000000, H01J0049000000 take precedence;details of vacuum tubes H01J0019000000; cathode-ray or electron-stream lamps H01J0063000000)
H01J0021020000	Tubes with a single discharge path
H01J0021040000	without control means, i.e. diodes
H01J0021060000	having electrostatic control means only
H01J0021080000	with movable electrode or electrodes
H01J0021100000	with one or more immovable internal control electrodes, e.g. triode, pentode, octode
H01J0021120000	Tubes with variable amplification factor
H01J0021140000	Tubes with means for concentrating the electron stream, e.g. beam tetrode
H01J0021160000	with external electrostatic control means and with or without internal control electrodes
H01J0021180000	having magnetic control means; having both magnetic and electrostatic control means
H01J0021200000	Tubes with more than one discharge path; Multiple tubes, e.g. double diode, triode-hexode (secondary-emission tubes, electron-multiplier tubes H01J0043000000);;
H01J0021220000	with movable electrode or electrodes
H01J0021240000	with variable amplification factor
H01J0021260000	with means for concentrating the electron stream
H01J0021340000	Tubes with electrode system arranged or dimensioned so as to eliminate transit-time effect (with flat electrodes H01J0021360000);;
H01J0021360000	Tubes with flat electrodes, e.g. disc electrode
H01J0023000000	Details of transit-time tubes of the types covered by group ; H01J0025000000
H01J0023020000	Electrodes; Magnetic control means; Screens (associated with resonator or delay system H01J0023160000);;
H01J0023027000	Collectors
H01J0023033000	Collector cooling devices
H01J0023040000	Cathodes
H01J0023050000	having a cylindrical emissive surface, e.g. cathodes for magnetrons
H01J0023060000	Electron or ion guns
H01J0023065000	producing a solid cylindrical beam (H01J0023075000 takes precedence);;
H01J0023070000	producing a hollow cylindrical beam (H01J0023075000 takes precedence);;
H01J0023075000	Magnetron injection guns
H01J0023080000	Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
H01J0023083000	Electrostatic focusing arrangements
H01J0023087000	Magnetic focusing arrangements
H01J0023090000	Electric systems for directing or deflecting the discharge along a desired path, e.g. E-type (focusing arrangements H01J0023080000);;
H01J0023100000	Magnet systems for directing or deflecting the discharge along a desired path, e.g. a spiral path (magnetic focusing arrangements H01J0023080000);;
H01J0023110000	Means for reducing noise (in electron or ion gun H01J0023060000);;
H01J0023120000	Vessels; Containers
H01J0023140000	Leading-in arrangements; Seals therefor
H01J0023150000	Means for preventing wave energy leakage structurally associated with tube leading-in arrangements, e.g. filters, chokes, attenuating devices
H01J0023160000	Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge (circuit elements, having distributed capacitance and inductance, in general H01P);;
H01J0023180000	Resonators
H01J0023200000	Cavity resonators; Adjustment or tuning thereof
H01J0023207000	Tuning of single resonator
H01J0023213000	Simultaneous tuning of more than one resonator, e.g. resonant cavities of a magnetron
H01J0023220000	Connections between resonators, e.g. strapping for connecting resonators of a magnetron
H01J0023240000	Slow-wave structures
H01J0023260000	Helical slow-wave structures; Adjustment therefor
H01J0023270000	Helix-derived slow-wave structures
H01J0023280000	Interdigital slow-wave structures; Adjustment therefor
H01J0023300000	Damping arrangements associated with slow-wave structures, e.g. for suppression of unwanted oscillations
H01J0023340000	Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
H01J0023360000	Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
H01J0023380000	to or from the discharge
H01J0023400000	to or from the interaction circuit
H01J0023420000	the interaction circuit being a helix or a helix-derived slow-wave structure (H01J0023440000-H01J0023480000;  take precedence);;
H01J0023440000	Rod-type coupling devices (H01J0023460000, H01J0023480000, H01J0023540000 take precedence);;
H01J0023460000	Loop coupling devices
H01J0023480000	for linking interaction circuit with coaxial lines; Devices of the coupled helices type (H01J0023460000 takes precedence);;
H01J0023500000	the interaction circuit being a helix or derived from a helix (H01J0023520000 takes precedence);;
H01J0023520000	the coupled helices being disposed coaxially around one another
H01J0023540000	Filtering devices preventing unwanted frequencies or modes to be coupled to, or out of, the interaction circuit; Prevention of high frequency leakage in the environment
H01J0025000000	Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons (details of transit-time tubes H01J0023000000;particle accelerators H05H)
H01J0025020000	Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving-up energy in an inducing zone, the zones being associated with one or more resonators (tubes in which a travelling wave is simulated at spaced gaps H01J0025340000);;
H01J0025040000	Tubes having one or more resonators, without reflection of the electron stream, and in which the modulation produced in the modulator zone is mainly density modulation, e.g. Haeff tube
H01J0025060000	Tubes having only one resonator, without reflection of the electron stream, and in which the modulation produced in the modulator zone is mainly velocity modulation, e.g. Lüdi klystron
H01J0025080000	with electron stream perpendicular to the axis of the resonator
H01J0025100000	Klystrons, i.e. tubes having two or more resonators, without reflection of the electron stream, and in which the stream is modulated mainly by velocity in the zone of the input resonator
H01J0025110000	Extended interaction klystrons
H01J0025120000	with pencil-like electron stream in the axis of the resonators
H01J0025140000	with tube-like electron stream coaxial with the axis of the resonators
H01J0025160000	with pencil-like electron stream perpendicular to the axis of the resonators
H01J0025180000	with radial or disc-like electron stream perpendicular to the axis of the resonators
H01J0025200000	having special arrangements in the space between resonators, e.g. resistive-wall amplifier tube, space-charge amplifier tube, velocity-jump tube
H01J0025220000	Reflex klystrons, i.e. tubes having one or more resonators, with a single reflection of the electron stream, and in which the stream is modulated mainly by velocity in the modulator zone
H01J0025240000	in which the electron stream is in the axis of the resonator or resonators and is pencil-like before reflection
H01J0025260000	in which the electron stream is coaxial with the axis of the resonator or resonators and is tube-like before reflection
H01J0025280000	in which the electron stream is perpendicular to the axis of the resonator or resonators and is pencil-like before reflection
H01J0025300000	in which the electron stream is perpendicular to the axis of the resonator or resonators and is radial or disc-like before reflection
H01J0025320000	Tubes with plural reflection, e.g. Coeterier tube
H01J0025340000	Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
H01J0025360000	Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field
H01J0025380000	the forward-travelling wave being utilised
H01J0025400000	the backward-travelling wave being utilised
H01J0025420000	Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and with a magnet system producing an H-field crossing the E-field (with travelling wave moving completely around the electron space H01J0025500000);;
H01J0025440000	the forward-travelling wave being utilised
H01J0025460000	the backward-travelling wave being utilised
H01J0025480000	Tubes in which two electron streams of different velocities interact with one another, e.g. electron-wave tube
H01J0025490000	Tubes using the parametric principle, e.g. for parametric amplification
H01J0025500000	Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field (with travelling wave not moving completely around the electron space H01J0025420000;functioning with plural reflection or with reversed cyclotron action H01J0025620000, H01J0025640000)
H01J0025520000	with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode
H01J0025540000	having only one cavity or other resonator, e.g. neutrode tube (having a composite resonator H01J0025580000);;
H01J0025550000	Coaxial-cavity magnetrons
H01J0025560000	with interdigital arrangement of anodes, e.g. turbator tube
H01J0025580000	having a number of resonators; having a composite resonator, e.g. a helix
H01J0025587000	Multi-cavity magnetrons
H01J0025593000	Rising-sun magnetrons
H01J0025600000	with an electron space having a shape that prevents any electron from moving completely around the cathode or guide electrode; Linear magnetrons
H01J0025610000	Hybrid tubes, i.e. tubes comprising a klystron section and a travelling-wave section
H01J0025620000	Strophotrons, i.e. tubes with H-field crossing the E-field and functioning with plural reflection
H01J0025640000	Turbine tubes, i.e. tubes with H-field crossing the E-field and functioning with reversed cyclotron action
H01J0025660000	Tubes with electron stream crossing itself and thereby interrupting, or interfering with, itself
H01J0025680000	Tubes specially designed to act as oscillator with positive grid and retarding field, e.g. for Barkhausen-Kurz oscillators (with secondary emission H01J0025760000);;
H01J0025700000	with resonator having distributed inductance and capacitance, e.g. Pintsch tube
H01J0025720000	in which a standing wave or a considerable part thereof is produced along an electrode, e.g. Clavier tube (with resonator having distributed inductance and capacitance H01J0025700000);;
H01J0025740000	Tubes specially designed to act as transit-time diode oscillators, e.g. monotron (with secondary emission H01J0025760000);;
H01J0025760000	Dynamic electron-multiplier tubes, e.g. Farnsworth multiplier tube, multipactor
H01J0025780000	Tubes with electron stream modulated by deflection in a resonator
H01J0027000000	Ion beam tubes (H01J0025000000, H01J0033000000, H01J0037000000 take precedence;particle accelerators H05H)
H01J0027020000	Ion sources; Ion guns (arrangements for handling particles, e.g. focusing, G21K0001000000;generating ions to be introduced into non-enclosed gases H01T0023000000; generating plasma H05H0001240000)
H01J0027040000	using reflex discharge, e.g. Penning ion sources
H01J0027060000	without applied magnetic field
H01J0027080000	using arc discharge
H01J0027100000	Duoplasmatrons (for use in particle accelerators H05H0007000000);;
H01J0027120000	provided with an expansion cup
H01J0027140000	Other arc discharge ion sources using an applied magnetic field
H01J0027160000	using high-frequency excitation, e.g. microwave excitation
H01J0027180000	with an applied axial magnetic field
H01J0027200000	using particle bombardment, e.g. ionisers
H01J0027220000	Metal ion sources
H01J0027240000	using photo-ionisation, e.g. using laser beam
H01J0027260000	using surface ionisation, e.g. field effect ion sources, thermionic ion sources (H01J0027200000, H01J0027240000 take precedence);;
H01J0029000000	Details of cathode-ray tubes or of electron-beam tubes of the types covered by group ; H01J0031000000
H01J0029020000	Electrodes; Screens; Mounting, supporting, spacing, or insulating thereof
H01J0029040000	Cathodes (electron guns H01J0029480000);;
H01J0029060000	Screens for shielding; Masks interposed in the electron stream
H01J0029070000	Shadow masks for colour-television tubes
H01J0029080000	Electrodes intimately associated with a screen on or from which an image or pattern is formed, picked-up converted, or stored, e.g. backing-plate for storage tube, for collecting secondary electrons (arrangements for colour switching H01J0029800000);;
H01J0029100000	Screens on, or from, which an image or pattern is formed, picked-up, converted, or stored
H01J0029120000	acting as light valves by shutter operation, e.g. for eidophor
H01J0029140000	acting by discolouration, e.g. halide screen
H01J0029160000	Incandescent screens
H01J0029180000	Luminescent screens
H01J0029200000	characterised by the luminescent material
H01J0029220000	characterised by the binder or adhesive for securing the luminescent material to its support, e.g. vessel
H01J0029240000	Supports for luminescent material
H01J0029260000	with superimposed luminescent layers
H01J0029280000	with protective, conductive, or reflective layers
H01J0029300000	with luminescent material discontinuously arranged, e.g. in dots or lines
H01J0029320000	with adjacent dots or lines of different luminescent material, e.g. for colour television
H01J0029340000	provided with permanent marks or references
H01J0029360000	Photoelectric screens; Charge-storage screens
H01J0029380000	not using charge storage, e.g. photo-emissive screen, extended cathode
H01J0029390000	Charge-storage screens
H01J0029410000	using secondary emission, e.g. for supericonoscope
H01J0029430000	using photo-emissive mosaic, e.g. for orthicon, for iconoscope
H01J0029440000	exhibiting internal electric effects caused by particle radiation, e.g. bombardment-induced conductivity
H01J0029450000	exhibiting internal electric effects caused by electromagnetic radiation, e.g. photoconductive screen, photodielectric screen, photovoltaic screen
H01J0029460000	Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
H01J0029480000	Electron guns
H01J0029500000	two or more guns being arranged in a single vacuum space, e.g. for plural-ray tubes (H01J0029510000 takes precedence);;
H01J0029510000	Arrangements for controlling convergence of a plurality of beams
H01J0029520000	Arrangements for controlling intensity of ray or beam, e.g. for modulation
H01J0029540000	Arrangements for centring ray or beam
H01J0029560000	Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses
H01J0029580000	Arrangements for focusing or reflecting ray or beam
H01J0029600000	Mirrors
H01J0029620000	Electrostatic lenses
H01J0029640000	Magnetic lenses
H01J0029660000	using electromagnetic means only
H01J0029680000	using permanent magnets only
H01J0029700000	Arrangements for deflecting ray or beam (circuit arrangements for producing sawtooth pulses or other deflecting voltages or currents H03K);;
H01J0029720000	along one straight line or along two perpendicular straight lines
H01J0029740000	Deflecting by electric fields only
H01J0029760000	Deflecting by magnetic fields only
H01J0029780000	along a circle, spiral, or rotating radial line, e.g. for radar display
H01J0029800000	Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration, for colour switching
H01J0029810000	using shadow masks (shadow masks per se H01J0029070000);;
H01J0029820000	Mounting, supporting, spacing, or insulating electron-optical or ion-optical arrangements
H01J0029840000	Traps for removing or diverting unwanted particles, e.g. negative ions, fringing electrons; Arrangements for velocity or mass selection (particle spectrometer or separator tubes H01J0049000000);;
H01J0029860000	Vessels; Containers; Vacuum locks
H01J0029870000	Arrangements for preventing or mitigating effects of implosion of vessels or containers
H01J0029880000	provided with coatings on the walls thereof; Selection of materials for the coatings (luminescent screens H01J0029180000);;
H01J0029890000	Optical or photographic arrangements structurally combined with the vessel
H01J0029900000	Leading-in arrangements; Seals therefor
H01J0029920000	Means forming part of the tube for the purpose of providing electrical connection to it (construction of connectors H01R);;
H01J0029940000	Selection of substances for gas fillings; Means for obtaining or maintaining the desired pressure within the tube, e.g. by gettering
H01J0029960000	One or more circuit elements structurally associated with the tube
H01J0029980000	Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
H01J0031000000	Cathode-ray tubes; Electron-beam tubes (H01J0025000000, H01J0033000000, H01J0035000000, H01J0037000000 take precedence;details of cathode-ray tubes or of electron-beam tubes H01J0029000000; cathode-ray or electron-stream lamps H01J0063000000)
H01J0031020000	having one or more output electrodes which may be impacted selectively by the ray or beam, and onto, from, or over which the ray or beam may be deflected or de-focused
H01J0031040000	with only one or two output electrodes
H01J0031060000	with more than two output electrodes, e.g. for multiple switching or counting
H01J0031080000	having a screen on or from which an image or pattern is formed, picked-up, converted, or stored
H01J0031100000	Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
H01J0031120000	with luminescent screen
H01J0031140000	Magic-eye or analogous tuning indicators
H01J0031150000	with ray or beam selectively directed to luminescent anode segments
H01J0031160000	with mask carrying a number of selectively displayable signs, e.g. numeroscope
H01J0031180000	with image written by a ray or beam on a grid-like charge-accumulating screen, and with a ray or beam passing through, and influenced by, this screen before striking the luminescent screen, e.g. direct-view storage tube
H01J0031200000	for displaying images or patterns in two or more colours
H01J0031220000	for stereoscopic displays
H01J0031240000	with screen acting as light valve by shutter operation, e.g. eidophor
H01J0031260000	Image pick-up tubes having an input of visible light and electric output (tubes without defined electron beams and having a light ray scanning a photo-emissive screen H01J0040200000);;
H01J0031280000	with electron ray scanning the image screen
H01J0031300000	having regulation of screen potential at anode potential, e.g. iconoscope
H01J0031320000	Tubes with image-amplification section, e.g. image-iconoscope, supericonoscope
H01J0031340000	having regulation of screen potential at cathode potential, e.g. orthicon
H01J0031360000	Tubes with image-amplification section, e.g. image-orthicon
H01J0031380000	Tubes with photoconductive screen, e.g. vidicon
H01J0031400000	having grid-like image screen through which the electron ray passes and by which the ray is influenced before striking the output electrode, i.e. having "triode action"
H01J0031420000	with image screen generating a composite electron beam which is deflected as a whole past a stationary probe to simulate a scanning effect, e.g. Farnsworth pick-up tube
H01J0031440000	Tubes with image-amplification section
H01J0031460000	Tubes in which electrical output represents both intensity and colour of image
H01J0031480000	Tubes with amplification of output effected by electron-multiplier arrangements within the vacuum space
H01J0031490000	Pick-up tubes adapted for an input of electromagnetic radiation other than visible light and having an electric output, e.g. for an input of X-rays, for an input of infra-red radiation
H01J0031495000	Pick-up tubes adapted for an input of sonic, ultrasonic, or mechanical vibrations and having an electric output
H01J0031500000	Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output
H01J0031520000	having grid-like image screen through which the electron ray or beam passes and by which the ray or beam is influenced before striking the luminescent output screen, i.e. having "triode action"
H01J0031540000	in which the electron ray or beam is reflected by the image input screen on to the image output screen
H01J0031560000	for converting or amplifying images in two or more colours
H01J0031580000	Tubes for storage of image or information pattern or for conversion of definition of television or like images, i.e. having electrical input and electrical output
H01J0031600000	having means for deflecting, either selectively or sequentially, an electron ray on to separate surface elements of the screen (by circuitry alone H01J0029980000);;
H01J0031620000	with separate reading and writing rays
H01J0031640000	on opposite sides of screen, e.g. for conversion of definition
H01J0031660000	having means for allowing all but selected cross-section elements of a homogeneous electron beam to reach corresponding elements of the screen, e.g. selectron
H01J0031680000	in which the information pattern represents two or more colours
H01J0033000000	Discharge tubes with provision for emergence of electrons or ions from the vessel (particle accelerators H05H);;Lenard tubes
H01J0033020000	Details
H01J0033040000	Windows
H01J0035000000	X-ray tubes (X-ray apparatus or circuits therefor H05G0001000000;betatrons or other particle accelerators for producing X-rays H05H)
H01J0035020000	Details
H01J0035040000	Electrodes
H01J0035060000	Cathodes
H01J0035080000	Anodes; Anticathodes
H01J0035100000	Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes
H01J0035120000	Cooling non-rotary anodes
H01J0035140000	Arrangements for concentrating, focusing, or directing the cathode ray
H01J0035160000	Vessels; Containers; Shields associated therewith
H01J0035180000	Windows
H01J0035200000	Selection of substances for gas fillings; Means for obtaining or maintaining the desired pressure within the tube, e.g. by gettering
H01J0035220000	specially designed for passing a very high current for a very short time, e.g. for flash operation
H01J0035240000	Tubes wherein the point of impact of the cathode ray on the anode or anticathode is movable relative to the surface thereof
H01J0035260000	by rotation of the anode or anticathode
H01J0035280000	by vibration, oscillation, reciprocation, or swash-plate motion of the anode or anticathode
H01J0035300000	by deflection of the cathode ray
H01J0035320000	Tubes wherein the X-rays are produced at or near the end of the tube or a part thereof, which tube or part has a small cross-section to facilitate introduction into a small hole or cavity
H01J0037000000	Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof (H01J0033000000, H01J0040000000, H01J0041000000, H01J0047000000, H01J0049000000 take precedence);;
H01J0037020000	Details
H01J0037040000	Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement, ion-optical arrangement
H01J0037050000	Electron- or ion-optical arrangements for separating electrons or ions according to their energy (particle separator tubes H01J0049000000);;
H01J0037060000	Electron sources; Electron guns
H01J0037063000	Geometrical arrangement of electrodes for beam-forming
H01J0037065000	Construction of guns or parts thereof (H01J0037067000-H01J0037077000;  take precedence);;
H01J0037067000	Replacing parts of guns; Mutual adjustment of electrodes (H01J0037073000-H01J0037077000;  take precedence;vacuum locks H01J0037180000)
H01J0037070000	Eliminating deleterious effects due to thermal effects or electric or magnetic fields (H01J0037073000-H01J0037077000;  take precedence);;
H01J0037073000	Electron guns using field emission, photo emission, or secondary emission electron sources
H01J0037075000	Electron guns using thermionic emission from cathodes heated by particle bombardment or by irradiation, e.g. by laser
H01J0037077000	Electron guns using discharge in gases or vapours as electron sources
H01J0037080000	Ion sources; Ion guns
H01J0037090000	Diaphragms; Shields associated with electron- or ion-optical arrangements; Compensation of disturbing fields
H01J0037100000	Lenses
H01J0037120000	electrostatic
H01J0037140000	magnetic
H01J0037141000	Electromagnetic lenses
H01J0037143000	Permanent magnetic lenses
H01J0037145000	Combinations of electrostatic and magnetic lenses
H01J0037147000	Arrangements for directing or deflecting the discharge along a desired path (lenses H01J0037100000);;
H01J0037150000	External mechanical adjustment of electron- or ion-optical components (H01J0037067000, H01J0037200000 take precedence);;
H01J0037153000	Electron-optical or ion-optical arrangements for the correction of image defects, e.g. stigmators
H01J0037160000	Vessels; Containers
H01J0037180000	Vacuum locks
H01J0037200000	Means for supporting or positioning the object or the material; Means for adjusting diaphragms or lenses associated with the support (preparing specimens for investigation G01N0001280000);;
H01J0037210000	Means for adjusting the focus
H01J0037220000	Optical or photographic arrangements associated with the tube
H01J0037240000	Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
H01J0037244000	Detectors; Associated components or circuits therefor (detectors per se G01T);;
H01J0037248000	Components associated with high voltage supply (high voltage supply per se H02J, H02M);;
H01J0037252000	Tubes for spot-analysing by electron or ion beams; Microanalysers (investigating or analysing thereby G01N0023220000);;
H01J0037256000	using scanning beams
H01J0037260000	Electron or ion microscopes; Electron- or ion-diffraction tubes
H01J0037270000	Shadow microscopy
H01J0037280000	with scanning beams (microanalysers using scanning beams H01J0037256000);;
H01J0037285000	Emission microscopes, e.g. field-emission microscopes
H01J0037290000	Reflection microscopes
H01J0037295000	Electron- or ion-diffraction tubes
H01J0037300000	Electron-beam or ion-beam tubes for localised treatment of objects
H01J0037301000	Arrangements enabling beams to pass between regions of different pressure
H01J0037302000	Controlling tubes by external information, e.g. programme control (H01J0037304000 takes precedence);;
H01J0037304000	Controlling tubes by information coming from the objects, e.g. correction signals
H01J0037305000	for casting, melting, evaporating, or etching
H01J0037310000	for cutting or drilling
H01J0037315000	for welding
H01J0037317000	for changing properties of the objects or for applying thin layers thereon, e.g. ion implantation (H01J0037360000 takes precedence);;
H01J0037320000	Gas-filled discharge tubes (heating by discharge H05B);;
H01J0037340000	operating with cathodic sputtering (H01J0037360000 takes precedence);;
H01J0037360000	for cleaning surfaces while plating with ions of materials introduced into the discharge, e.g. introduced by evaporation
H01J0040000000	Photoelectric discharge tubes not involving the ionisation of a gas (H01J0049000000 takes precedence;cathode-ray or image-pick-up tubes H01J0031260000)
H01J0040020000	Details
H01J0040040000	Electrodes
H01J0040060000	Photo-emissive cathodes
H01J0040080000	Magnetic means for controlling discharge
H01J0040100000	Selection of substances for gas fillings
H01J0040120000	One or more circuit elements structurally associated with the tube
H01J0040140000	Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
H01J0040160000	having photo-emissive cathode, e.g. alkaline photoelectric cell (operating with secondary emission H01J0043000000);;
H01J0040180000	with luminescent coatings for influencing the sensitivity of the tube, e.g. by converting the input wavelength (image-conversion or image-amplification tubes H01J0031500000);;
H01J0040200000	wherein a light-ray scans a photo-emissive screen
H01J0041000000	Discharge tubes for measuring pressure of introduced gas; Discharge tubes for evacuation by diffusion of ions
H01J0041020000	Discharge tubes for measuring pressure of introduced gas
H01J0041040000	with ionisation by means of thermionic cathodes
H01J0041060000	with ionisation by means of cold cathodes
H01J0041080000	with ionisation by means of radioactive substances, e.g. alphatrons
H01J0041100000	of particle-spectrometer type (particle spectrometers per se H01J0049000000);;
H01J0041120000	Discharge tubes for evacuating by diffusion of ions, e.g. ion pumps, getter ion pumps
H01J0041140000	with ionisation by means of thermionic cathodes
H01J0041160000	using gettering substances
H01J0041180000	with ionisation by means of cold cathodes
H01J0041200000	using gettering substances
H01J0043000000	Secondary-emission tubes; Electron-multiplier tubes (dynamic electron-multiplier tubes H01J0025760000;secondary-emission detectors for measurement of nuclear or X-radiation G01T0001280000)
H01J0043020000	Tubes in which one or a few electrodes are secondary-electron-emitting electrodes
H01J0043040000	Electron multipliers
H01J0043060000	Electrode arrangements
H01J0043080000	Cathode arrangements (construction of photo cathodes H01J0040060000, H01J0040160000, H01J0047000000, H01J0049080000);;
H01J0043100000	Dynodes (H01J0043240000, H01J0043260000 take precedence;secondary-electron-emitting electrodes in general H01J0001320000)
H01J0043120000	Anode arrangements
H01J0043140000	Control of electron beam by magnetic field
H01J0043160000	Electrode arrangements using essentially one dynode
H01J0043180000	Electrode arrangements using essentially more than one dynode
H01J0043200000	Dynodes consisting of sheet material, e.g. plane, bent
H01J0043220000	Dynodes consisting of electron-permeable material, e.g. foil, grid, tube, venetian blind
H01J0043240000	Dynodes having potential gradient along their surfaces
H01J0043260000	Box dynodes
H01J0043280000	Vessels; Windows; Screens; Suppressing undesired discharges or currents
H01J0043300000	Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
H01J0045000000	Discharge tubes functioning as thermionic generators
H01J0047000000	Tubes for determining the presence, intensity, density or energy of radiation or particles (photoelectric discharge tubes not involving the ionisation of a gas H01J0040000000);;
H01J0047020000	Ionisation chambers
H01J0047040000	Capacitive ionisation chambers, e.g. the electrodes of which are used as electrometers (electrostatic dosimeters in general G01T0001140000);;
H01J0047060000	Proportional counter tubes
H01J0047080000	Geiger-Müller counter tubes
H01J0047100000	Spark counters (H01J0047140000 takes precedence;spark gaps H01T)
H01J0047120000	Neutron detector tubes, e.g. BF3 tubes
H01J0047140000	Parallel electrode spark or streamer chambers; Wire spark or streamer chambers
H01J0047160000	characterised by readout of each individual wire
H01J0047180000	the readout being electrical (H01J0047200000 takes precedence);;
H01J0047200000	the readout employing electrical or mechanical delay lines, e.g. magnetostrictive delay lines
H01J0047220000	characterised by another type of readout
H01J0047240000	the readout being acoustical
H01J0047260000	the readout being optical
H01J0049000000	Particle spectrometer or separator tubes
H01J0049020000	Details
H01J0049040000	Arrangements for introducing or extracting samples to be analysed, e.g. vacuum locks; Arrangements for external adjustment of electron- or ion-optical components
H01J0049060000	Electron- or ion-optical arrangements (H01J0049040000 takes precedence);;
H01J0049080000	Electron sources, e.g. for generating photo-electrons, secondary electrons or Auger electrons
H01J0049100000	Ion sources; Ion guns
H01J0049120000	using an arc discharge, e.g. of the duoplasmatron type
H01J0049140000	using particle bombardment, e.g. ionisation chambers
H01J0049160000	using surface ionisation, e.g. field-, thermionic- or photo-emission
H01J0049180000	using spark ionisation
H01J0049200000	Magnetic deflection
H01J0049220000	Electrostatic deflection
H01J0049240000	Vacuum systems, e.g. maintaining desired pressures
H01J0049260000	Mass spectrometers or separator tubes (isotope separation using these tubes B01D0059440000);;
H01J0049280000	Static spectrometers
H01J0049300000	using magnetic analysers
H01J0049320000	using double focusing
H01J0049340000	Dynamic spectrometers
H01J0049360000	Radio frequency spectrometers, e.g. Bennett-type spectrometers, Redhead-type spectrometers
H01J0049380000	Omegatrons
H01J0049400000	Time-of-flight spectrometers (H01J0049360000 takes precedence);;
H01J0049420000	Stability-of-path spectrometers, e.g. monopole, quadrupole, multipole, farvitrons
H01J0049440000	Energy spectrometers, e.g. alpha-, beta-spectrometers
H01J0049460000	Static spectrometers
H01J0049480000	using electrostatic analysers, e.g. cylindrical sector, Wien filter
H01J0061000000	Gas- or vapour-discharge lamps (use for sterilising milk products A23C;use for medical purposes A61N0005000000; use for disinfecting water C02F; use for lighting F21; circuits therefor H05B; arc lamps with consumable electrodes H05B; electroluminescent lamps H05B)
H01J0061020000	Details
H01J0061040000	Electrodes (for igniting H01J0061540000);;Screens; Shields
H01J0061060000	Main electrodes
H01J0061067000	for low-pressure discharge lamps
H01J0061073000	for high-pressure discharge lamps
H01J0061090000	Hollow cathodes
H01J0061100000	Shield, screens, or guides for influencing the discharge
H01J0061120000	Selection of substances for gas fillings; Specified operating pressure or temperature
H01J0061140000	having one or more carbon compounds as the principal constituents
H01J0061160000	having helium, argon, neon, krypton, or xenon as the principle constituent
H01J0061180000	having a metallic vapour as the principal constituent
H01J0061200000	mercury vapour
H01J0061220000	vapour of an alkali metal
H01J0061240000	Means for obtaining or maintaining the desired pressure within the vessel
H01J0061260000	Means for absorbing or adsorbing gas, e.g. by gettering; Means for preventing blackening of the envelope
H01J0061280000	Means for producing, introducing, or replenishing gas or vapour during operation of the lamp
H01J0061300000	Vessels; Containers
H01J0061320000	Special longitudinal shape, e.g. for advertising purposes
H01J0061330000	Special shape of cross-section, e.g. for producing cool spot
H01J0061340000	Double-wall vessels or containers
H01J0061350000	provided with coatings on the walls thereof; Selection of materials for the coatings (using coloured coatings H01J0061400000;using luminescent coatings H01J0061420000)
H01J0061360000	Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
H01J0061380000	Devices for influencing the colour or wavelength of the light
H01J0061400000	by light-filters; by coloured coatings in or on the envelope
H01J0061420000	by transforming the wavelength of the light by luminescence
H01J0061440000	Devices characterised by the luminescent material (luminescent materials C09K0011000000);;
H01J0061460000	Devices characterised by the binder or other non-luminescent constituent of the luminescent material, e.g. for obtaining desired pouring or drying properties
H01J0061480000	Separate coatings of different luminous materials
H01J0061500000	Auxiliary parts or solid material within the envelope for reducing risk of explosion upon breakage of the envelope, e.g. for use in mines
H01J0061520000	Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
H01J0061540000	Igniting arrangements, e.g. promoting ionisation for starting (circuit arrangements H05B);;
H01J0061560000	One or more circuit elements structurally associated with the lamp
H01J0061580000	Lamps with both liquid anode and liquid cathode
H01J0061600000	Lamps in which the discharge space is substantially filled with mercury before ignition
H01J0061620000	Lamps with gaseous, e.g. plasma cathode
H01J0061640000	Cathode glow lamps (designed as tuning or voltage indicators H01J0017400000);;
H01J0061660000	having one or more specially shaped cathodes, e.g. for advertising purposes
H01J0061680000	Lamps in which the main discharge is between parts of a current-carrying guide, e.g. halo lamp
H01J0061700000	Lamps with low-pressure unconstricted discharge
H01J0061720000	having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury
H01J0061740000	having a main light-emitting filling of difficult vaporisable metal vapour, e.g. sodium
H01J0061760000	having a filling of permanent gas or gases only
H01J0061780000	with cold cathode; with cathode heated only by discharge, e.g. high-tension lamp for advertising
H01J0061800000	Lamps suitable only for intermittent operation, e.g. flash lamp
H01J0061820000	Lamps with high-pressure unconstricted discharge
H01J0061840000	Lamps with discharge constricted by high pressure
H01J0061860000	with discharge additionally constricted by close spacing of electrodes, e.g. for optical projection
H01J0061880000	with discharge additionally constricted by envelope
H01J0061900000	Lamps suitable only for intermittent operation, e.g. flash lamp
H01J0061920000	Lamps with more than one main discharge path
H01J0061940000	Paths producing light of different wavelengths, e.g. for simulating daylight
H01J0061950000	Lamps with control electrode for varying intensity or wavelength of the light, e.g. for producing modulated light
H01J0061960000	Lamps with light-emitting discharge path and separately-heated incandescent body within a common envelope, e.g. for simulating daylight (lamps with filament heated only by non-luminous discharge H01K);;
H01J0061980000	Lamps with closely spaced electrodes heated to incandescence by light-emitting discharge, e.g. tungsten arc lamp
H01J0063000000	Cathode-ray or electron-stream lamps (flying-spot tubes H01J0031100000;magic-eye tuning indicators H01J0031140000; lamps with incandescent body heated by the ray or stream H01K)
H01J0063020000	Details, e.g. electrode, gas filling, shape of vessel
H01J0063040000	Vessels provided with luminescent coatings; Selection of materials for the coatings
H01J0063060000	Lamps with luminescent screen excited by the ray or stream
H01J0063080000	Lamps with gas plasma excited by the ray or stream
H01J0065000000	Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
H01J0065040000	Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating
H01J0065060000	Lamps in which a gas filling is excited to luminesce by radioactive material structurally associated with the lamp, e.g. inside the vessel
H01J0065080000	Lamps in which a screen or coating is excited to luminesce by radioactive material located inside the vessel
H01K	ELECTRIC INCANDESCENT LAMPS (details or apparatus or processes for manufacture applicable to both discharge devices and incandescent lamps H01J;light sources using a combination of incandescent and other types of light generation H01J0061960000, H05B0035000000; circuits therefor H05B)
H01K0001000000	Details
H01K0001020000	Incandescent bodies
H01K0001040000	characterised by the material thereof
H01K0001060000	Carbon bodies
H01K0001080000	Metallic bodies
H01K0001100000	Bodies of metal or carbon combined with other substance
H01K0001120000	Bodies which are non-conductive when cold, e.g. for Nernst lamp
H01K0001140000	characterised by the shape
H01K0001160000	Electric connection thereto
H01K0001180000	Mountings or supports for the incandescent body
H01K0001200000	characterised by the material thereof
H01K0001220000	Lamp stems (seals for leading conductors therethrough H01K0001380000);;
H01K0001240000	Mounts for lamps with connections at opposite ends, e.g. for tubular lamp
H01K0001260000	Screens; Filters (associated with envelope H01K0001280000);;
H01K0001280000	Envelopes; Vessels
H01K0001300000	incorporating lenses
H01K0001320000	provided with coatings on the walls; Vessels or coatings thereon characterised by the material thereof
H01K0001340000	Double-wall vessels
H01K0001360000	Seals between parts of vessel, e.g. between stem and envelope
H01K0001380000	Seals for leading-in conductors
H01K0001400000	Leading-in conductors
H01K0001420000	Means forming part of the lamp for the purpose of providing electrical connection to, or support for, the lamp (electric coupling devices comprising a holder adapted for supporting a lamp and not forming part of the lamp H01R0033000000);;
H01K0001440000	directly applied to, or forming part of, the vessel
H01K0001460000	supported by a separate part, e.g. base, cap
H01K0001480000	Removable caps
H01K0001500000	Selection of substances for gas fillings; Specified pressure thereof
H01K0001520000	Means for obtaining or maintaining the desired pressure within the vessel
H01K0001540000	Means for adsorbing or absorbing gas, or for preventing or removing efflorescence, e.g. by gettering
H01K0001560000	characterised by the material of the getter
H01K0001580000	Cooling arrangements
H01K0001600000	Means structurally associated with the lamp for indicating defects or previous use
H01K0001620000	One or more circuit elements structurally associated with the lamp
H01K0001640000	with built-in switch
H01K0001660000	with built-in fuse
H01K0001680000	with built-in spark gap
H01K0001700000	with built-in short-circuiting device, e.g. for serially-connected lamps
H01K0003000000	Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof (manufacture of vessels from glass C03B);;
H01K0003020000	Manufacture of incandescent bodies
H01K0003040000	Machines therefor
H01K0003060000	Attaching of incandescent bodies to mount
H01K0003080000	Manufacture of mounts or stems
H01K0003100000	Machines therefor
H01K0003120000	Joining of mount or stem to vessel; Joining parts of the vessel, e.g. by butt sealing
H01K0003140000	Machines therefor
H01K0003160000	Joining of caps to vessel
H01K0003180000	Machines therefor
H01K0003200000	Sealing-in wires directly into the envelope
H01K0003220000	Exhausting, degassing, filling, or cleaning vessels
H01K0003240000	Machines therefor
H01K0003260000	Closing of vessels
H01K0003280000	Machines having sequentially arranged operating stations
H01K0003300000	Repairing or regenerating used or defective lamps
H01K0003320000	Auxiliary devices for cleaning, placing, or removing incandescent lamps
H01K0005000000	Lamps for general lighting (H01K0009000000-H01K0013000000;  take precedence);;
H01K0005020000	with connections made at opposite ends, e.g. tubular lamp with axially arranged filament
H01K0007000000	Lamps for purposes other than general lighting (H01K0009000000-H01K0013000000;  take precedence);;
H01K0007020000	for producing a narrow beam of light; for approximating a point-like source of light, e.g. for searchlight, for cinematographic projector (producing narrow beams by optical means external to lamp F21V);;
H01K0007040000	for indicating
H01K0007060000	for decorative purposes
H01K0009000000	Lamps having two or more incandescent bodies separately heated (H01K0011000000, H01K0013000000 take precedence;incandescent-filament-type indicating arrangements affected by the combination of a number of individual lamps G09F0009307000)
H01K0009020000	to provide substitution in the event of failure of one of the bodies
H01K0009040000	with built-in manually-operated switch
H01K0009060000	with built-in device, e.g. switch, for automatically completing circuit of reserve body
H01K0009080000	to provide selectively different light effects, e.g. for automobile headlamp
H01K0011000000	Lamps having an incandescent body which is not conductively heated, e.g. heated inductively, heated by electronic discharge (H01K0013000000 takes precedence;heated by light-emitting discharge H01J0061980000)
H01K0013000000	Lamps having an incandescent body which is substantially non-conductive until heated, e.g. Nernst lamp
H01K0013020000	Heating arrangements
H01K0013040000	using electric discharge
H01K0013060000	using induction heating; using high-frequency field
H01L	SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR (use of semiconductor devices for measuring G01;resistors in general H01C; magnets, inductors, transformers H01F; capacitors in general H01G; electrolytic devices H01G0009000000; batteries, accumulators H01M; waveguides, resonators, or lines of the waveguide type H01P; line connectors, current collectors H01R; stimulated-emission devices H01S; electromechanical resonators H03H; electromechanical transducers for electrical communication H04R; electric light sources in general H05B; printed circuits, hybrid circuits, casings or constructional details of electrical apparatus, manufacture of assemblages of electrical components H05K; use of semiconductor devices in circuits having a particular application, see the subclass for the application);
H01L0021000000	Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof (processes or apparatus peculiar to the manufacture or treatment of devices provided for in groups H01L0031000000-H01L0049000000;  or of parts thereof, see these groups;single-step processes covered by other subclasses, see the relevant subclasses, e.g. C23C, C30B; preparation of originals for the photo-mechanical production of textured or patterned surfaces G03F0001000000)
H01L0021020000	Manufacture or treatment of semiconductor devices or of parts thereof
H01L0021040000	the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer, carrier concentration layer
H01L0021060000	the devices having semiconductor bodies comprising selenium or tellurium in uncombined form other than as impurities in semiconductor bodies of other materials
H01L0021080000	Preparation of the foundation plate
H01L0021100000	Preliminary treatment of the selenium or tellurium, its application to the foundation plate, or the subsequent treatment of the combination
H01L0021103000	Conversion of the selenium or tellurium to the conductive state
H01L0021105000	Treatment of the surface of the selenium or tellurium layer after having been made conductive
H01L0021108000	Provision of discrete insulating layers, i.e. non-genetic barrier layers
H01L0021120000	Application of an electrode to the exposed surface of the selenium or tellurium after the selenium or tellurium has been applied to the foundation plate
H01L0021140000	Treatment of the complete device, e.g. by electroforming to form a barrier
H01L0021145000	Ageing
H01L0021160000	the devices having semiconductor bodies comprising cuprous oxide or cuprous iodide
H01L0021180000	the devices having semiconductor bodies comprising elements of the fourth group of the Periodic System or AIII BV compounds with or without impurities, e.g. doping materials
H01L0021200000	Deposition of semiconductor materials on a substrate, e.g. epitaxial growth
H01L0021203000	using physical deposition, e.g. vacuum deposition, sputtering
H01L0021205000	using reduction or decomposition of a gaseous compound yielding a solid condensate, i.e. chemical deposition
H01L0021208000	using liquid deposition
H01L0021220000	Diffusion of impurity materials, e.g. doping materials, electrode materials, into, or out of, a semiconductor body, or between semiconductor regions
H01L0021223000	using diffusion into, or out of, a solid from or into a gaseous phase
H01L0021225000	using diffusion into, or out of, a solid from or into a solid phase, e.g. a doped oxide layer
H01L0021228000	using diffusion into, or out of, a solid from or into a liquid phase, e.g. alloy diffusion processes
H01L0021240000	Alloying of impurity materials, e.g. doping materials, electrode materials, with a semiconductor body
H01L0021260000	Bombardment with radiation
H01L0021263000	with high-energy radiation
H01L0021265000	producing ion implantation (ion-beam tubes for localised treatment H01J0037300000);;
H01L0021268000	using electromagnetic radiation, e.g. laser radiation
H01L0021280000	Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups ; H01L0021200000-H01L0021268000
H01L0021283000	Deposition of conductive or insulating materials for electrodes
H01L0021285000	from a gas or vapour, e.g. condensation
H01L0021288000	from a liquid, e.g. electrolytic deposition
H01L0021300000	Treatment of semiconductor bodies using processes or apparatus not provided for in groups  H01L0021200000-H01L0021260000; (manufacture of electrodes thereon H01L0021280000);;
H01L0021302000	to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
H01L0021304000	Mechanical treatment, e.g. grinding, ultrasonic treatment
H01L0021306000	Chemical or electrical treatment, e.g. electrolytic etching (to form insulating layers H01L0021310000);;
H01L0021308000	using masks
H01L0021310000	to form insulating layers thereon, e.g. for masking (layers forming electrodes H01L0021280000;encapsulating layers H01L0021560000)
H01L0021312000	Organic layers, e.g. photoresist
H01L0021314000	Inorganic layers
H01L0021316000	composed of oxides or glassy oxides or oxide-based glass
H01L0021318000	composed of nitrides
H01L0021320000	using masks (H01L0021308000 takes precedence);;
H01L0021322000	to modify their internal properties, e.g. to produce internal imperfections
H01L0021324000	Thermal treatment for modifying the properties of semiconductor bodies, e.g. annealing, sintering (H01L0021200000-H01L0021288000, H01L0021302000-H01L0021322000;  take precedence);;
H01L0021326000	Application of electric currents or fields, e.g. for electroforming (H01L0021200000-H01L0021288000, H01L0021302000-H01L0021324000;  take precedence);;
H01L0021340000	the devices having semiconductor bodies not provided for in groups ; H01L0021060000, H01L0021160000, and H01L0021180000;  with or without impurities, e.g. doping materials
H01L0021360000	Deposition of semiconductor materials on a substrate, e.g. epitaxial growth
H01L0021363000	using physical deposition, e.g. vacuum deposition, sputtering
H01L0021365000	using reduction or decomposition of a gaseous compound yielding a solid condensate, i.e. chemical deposition
H01L0021368000	using liquid deposition
H01L0021380000	Diffusion of impurity materials, e.g. doping materials, electrode materials, into, or out of, a semiconductor body, or between semiconductor regions
H01L0021383000	using diffusion into, or out of, a solid from or into a gaseous phase
H01L0021385000	using diffusion into, or out of, a solid from or into a solid phase, e.g. a doped oxide layer
H01L0021388000	using diffusion into, or out of, a solid from or into a liquid phase, e.g. alloy diffusion processes
H01L0021400000	Alloying of impurity materials, e.g. doping materials, electrode materials, with a semiconductor body
H01L0021420000	Bombardment with radiation
H01L0021423000	with high-energy radiation
H01L0021425000	producing ion implantation (ion-beam tubes for localised treatment H01J0037300000);;
H01L0021428000	using electromagnetic radiation, e.g. laser radiation
H01L0021440000	Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups ; H01L0021360000-H01L0021428000
H01L0021441000	Deposition of conductive or insulating materials for electrodes
H01L0021443000	from a gas or vapour, e.g. condensation
H01L0021445000	from a liquid, e.g. electrolytic deposition
H01L0021447000	involving the application of pressure, e.g. thermo-compression bonding (H01L0021607000 takes precedence);;
H01L0021449000	involving the application of mechanical vibrations, e.g. ultrasonic vibrations
H01L0021460000	Treatment of semiconductor bodies using processes or apparatus not provided for in groups  H01L0021360000-H01L0021428000; (manufacture of electrodes thereon H01L0021440000);;
H01L0021461000	to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
H01L0021463000	Mechanical treatment, e.g. grinding, ultrasonic treatment
H01L0021465000	Chemical or electrical treatment, e.g. electrolytic etching (to form insulating layers H01L0021469000);;
H01L0021467000	using masks
H01L0021469000	to form insulating layers thereon, e.g. for masking (layers forming electrodes H01L0021440000;encapsulating layers H01L0021560000)
H01L0021470000	Organic layers, e.g. photoresist
H01L0021471000	Inorganic layers
H01L0021473000	composed of oxides or glassy oxides or oxide-based glass
H01L0021475000	using masks (H01L0021467000 takes precedence);;
H01L0021477000	Thermal treatment for modifying the properties of semiconductor bodies, e.g. annealing, sintering (H01L0021360000-H01L0021449000, H01L0021461000-H01L0021475000;  take precedence);;
H01L0021479000	Application of electric currents or fields, e.g. for electroforming (H01L0021360000-H01L0021449000, H01L0021461000-H01L0021477000;  take precedence);;
H01L0021480000	Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the groups  H01L0021060000-H01L0021326000; (containers, encapsulations, fillings, mountings per se H01L0023000000);;
H01L0021500000	Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the groups ; H01L0021060000-H01L0021326000
H01L0021520000	Mounting semiconductor bodies in containers
H01L0021540000	Providing fillings in containers, e.g. gas fillings
H01L0021560000	Encapsulations, e.g. encapsulating layers, coatings
H01L0021580000	Mounting semiconductor devices on supports
H01L0021600000	Attaching leads or other conductive members, to be used for carrying current to or from the device in operation
H01L0021603000	involving the application of pressure, e.g. thermo-compression bonding (H01L0021607000 takes precedence);;
H01L0021607000	involving the application of mechanical vibrations, e.g. ultrasonic vibrations
H01L0021620000	the devices having no potential-jump barriers or surface barriers
H01L0021640000	Manufacture or treatment of solid state devices other than semiconductor devices, or of parts thereof, not peculiar to a single device provided for in groups ; H01L0031000000-H01L0049000000
H01L0021660000	Testing or measuring during manufacture or treatment (after manufacture G01R0031260000);;
H01L0021680000	Apparatus for supporting or positioning components during manufacture, e.g. jigs
H01L0021700000	Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof (manufacture of assemblies consisting of preformed electrical components H05K0003000000, H05K0013000000);;
H01L0021720000	the substrate being a semiconductor body
H01L0021740000	Making of buried regions of high impurity concentration, e.g. buried collector layers, internal connections
H01L0021760000	Making of isolation regions between components, e.g. PN junctions, dielectric layers, air gaps
H01L0021780000	with subsequent division of the substrate into a plurality of individual components
H01L0021800000	each individual component consisting of a plurality of components formed in or on a common substrate
H01L0021820000	without subsequent division of the substrate into a plurality of individual components, e.g. integrated circuits
H01L0021840000	the substrate being other than a semiconductor body, e.g. being an insulating body
H01L0021860000	the insulating body being sapphire, e.g. silicon on sapphire structure, i.e. SOS
H01L0021880000	Applying leads or other conductive members to be used for carrying current
H01L0021900000	within the device from one component in operation to the other
H01L0021920000	to or from the device in operation
H01L0021940000	Forming insulating layers or insulating regions
H01L0021950000	within the device
H01L0021960000	Manufacture or treatment of parts, e.g. containers, for devices consisting of a plurality of solid state components formed in or on a common substrate, prior to assembly of the devices; Manufacture or treatment of parts, e.g. containers, for integrated circuit devices, prior to assembly of the devices (containers, encapsulations, fillings, mountings per se H01L0023000000);;
H01L0021980000	Assembly of devices consisting of solid state components formed in or on a common substrate; Assembly of integrated circuit devices
H01L0023000000	Details of semiconductor or other solid state devices (H01L0025000000 takes precedence;details of semiconductor bodies or of electrodes of devices provided for in group H01L0029000000;  are classified thereindetails peculiar to devices provided for in a single group of groups H01L0031000000-H01L0049000000;  are classified therein);
H01L0023020000	Containers; Seals (H01L0023120000, H01L0023340000, H01L0023480000 take precedence);;
H01L0023040000	characterised by the shape
H01L0023060000	characterised by the material of the container or its electrical properties
H01L0023080000	the material being an electrical insulator, e.g. glass
H01L0023100000	characterised by the material or arrangement of seals between parts, e.g. between containers and mountings
H01L0023120000	Mountings
H01L0023140000	characterised by the material or its electrical properties
H01L0023160000	Fillings
H01L0023180000	characterised by the material or its physical or chemical properties or its arrangement within the complete device
H01L0023200000	gaseous at the normal operating temperature of the device
H01L0023220000	liquid at the normal operating temperature of the device
H01L0023240000	solid or gel, at the normal operating temperature of the device
H01L0023260000	including materials for absorbing or reacting with moisture or other undesired substances
H01L0023280000	Encapsulations
H01L0023300000	characterised by the material or arrangement of the encapsulation
H01L0023320000	Holders for supporting the complete device in operation
H01L0023340000	Cooling arrangements; Heating arrangements; Ventilating arrangements
H01L0023360000	Selection of materials, or shaping, to facilitate cooling or heating, e.g. heat sinks
H01L0023380000	Cooling arrangements using the Peltier effect
H01L0023400000	Mountings or securing means for detachable cooling or heating arrangements
H01L0023420000	Fillings selected or arranged to facilitate heating or cooling, e.g. by change of state
H01L0023440000	the complete device being wholly immersed in a fluid other than air
H01L0023460000	involving the transfer of heat by flowing fluids (H01L0023420000, H01L0023440000 take precedence);;
H01L0023480000	Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements (in general H01R);;
H01L0023500000	for integrated circuit devices
H01L0023520000	Arrangements for conducting electric current within the device in operation from one component to another
H01L0023540000	Details of semiconductor or other solid state devices or of electrodes thereof, e.g. selection of materials therefor, not peculiar to devices provided for in a single group of groups  H01L0031000000-H01L0049000000; (H01L0029000000 takes precedence);;
H01L0023560000	Circuit arrangements not adapted to a particular application of the device, e.g. for temperature compensation
H01L0025000000	Assemblies consisting of a plurality of individual semiconductor or other solid state devices, e.g. solar panels (devices consisting of a plurality of solid state components formed in or on a common substrate H01L0027000000;generators using solar cells or solar panels H02N0006000000; details of complete circuit assemblies provided for in another subclass, e.g. details of television receivers, see the relevant subclass, e.g. H04N; details of assemblies of electrical components in general H05K)
H01L0025020000	the devices all being of a type provided for in the same main group of groups ; H01L0027000000-H01L0049000000, e.g. assemblies of rectifiers or of solar cells
H01L0025040000	the devices not having separate containers
H01L0025060000	Apertured devices mounted on one or more rods passed through the apertures
H01L0025080000	Stacked arrangements of non-apertured devices
H01L0025100000	the devices having separate containers
H01L0025120000	having one terminal in common
H01L0025140000	Stacked arrangements, e.g. of sandwich-type rectifiers
H01L0025160000	the devices being of types provided for in two or more different main groups of groups ; H01L0027000000-H01L0049000000
H01L0027000000	Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate (processes or apparatus adapted for the manufacture or treatment thereof or of parts thereof H01L0021700000, H01L0031000000-H01L0049000000; details thereof H01L0023000000, H01L0029000000-H01L0049000000; assemblies consisting of a plurality of individual solid state devices H01L0025000000; assemblies of electrical components in general H05K)
H01L0027010000	comprising only passive thin-film or thick-film elements formed on a common insulating substrate
H01L0027020000	including semiconductor components adapted for rectifying, oscillating, amplifying, switching or including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
H01L0027040000	the substrate being a semiconductor body
H01L0027060000	including a plurality of individual components in a non-repetitive configuration
H01L0027080000	including only semiconductor components of a single kind
H01L0027100000	including a plurality of individual components in a repetitive configuration
H01L0027120000	the substrate being other than a semiconductor body, e.g. an insulating body
H01L0027130000	combined with thin-film or thick-film passive components
H01L0027140000	including semiconductor components sensitive to infra-red radiation, light, electromagnetic radiation of a shorter wavelength, or corpuscular radiation of a shorter wavelength, or corpuscular radiation and adapted for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation (radiation-sensitive components structurally associated with one or more electric light sources only H01L0031140000;couplings of light guides with optoelectronic elements G02B0006420000)
H01L0027150000	including semiconductor components with at least one potential-jump barrier or surface barrier adapted for light emission
H01L0027160000	including thermoelectric components with or without a junction of dissimilar materials; including thermomagnetic components (using the Peltier effect only for cooling of semiconductor or other solid state devices H01L0023380000);;
H01L0027180000	including components exhibiting superconductivity
H01L0027200000	including piezo-electric components; including electrostrictive components; including magnetostrictive components; including semiconductor components adapted for use as electromechanical transducers (electromechanical transducers adapted for electrical communication technique H04R);;
H01L0027220000	including components using galvano-magnetic effects, e.g. Hall effect; using similar magnetic field effects
H01L0027240000	including solid state components for rectifying, amplifying, or switching without a potential-jump barrier or surface barrier
H01L0027260000	including bulk negative resistance effect components
H01L0029000000	Semiconductor devices adapted for rectifying, amplifying, oscillating, or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof (H01L0031000000-H01L0047000000;  take precedence;processes or apparatus adapted for the manufacture or treatment thereof or of parts thereof H01L0021000000; details other than of semiconductor bodies or of electrodes thereof H01L0023000000; devices consisting of a plurality of solid state components formed in or on a common substrate H01L0027000000; resistors in general H01C; capacitors in general H01G)
H01L0029020000	characterised by their semiconductor bodies
H01L0029040000	characterised by their crystalline structure, e.g. polycrystalline, cubic, particular orientation of crystalline planes (imperfections H01L0029300000);;
H01L0029060000	characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions
H01L0029080000	with semiconductor regions connected to an electrode carrying current to be rectified, amplified, or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
H01L0029100000	with semiconductor regions connected to an electrode not carrying current to be rectified, amplified, or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
H01L0029120000	characterised by the materials of which they are formed
H01L0029140000	Inorganic materials
H01L0029160000	including, apart from doping materials or other impurities, only elements of the fourth group of the Periodic System in uncombined form
H01L0029161000	including two or more of the elements provided for in group ; H01L0029160000
H01L0029163000	in the same semiconductor region
H01L0029165000	in different semiconductor regions
H01L0029167000	further characterised by the doping material
H01L0029180000	Selenium or tellurium only, apart from doping materials or other impurities
H01L0029200000	including, apart from doping materials or other impurities, only AIII BV compounds
H01L0029201000	including two or more compounds
H01L0029203000	in the same semiconductor region
H01L0029205000	in different semiconductor regions
H01L0029207000	further characterised by the doping material
H01L0029220000	including, apart from doping materials or other impurities, only AII BVI compounds
H01L0029221000	including two or more compounds
H01L0029223000	in the same semiconductor region
H01L0029225000	in different semiconductor regions
H01L0029227000	further characterised by the doping material
H01L0029240000	including, apart from doping materials or other impurities, only semiconductor materials not provided for in groups ; H01L0029160000, H01L0029180000, H01L0029200000, H01L0029220000
H01L0029260000	including, apart from doping materials or other impurities, elements provided for in two or more of the groups ; H01L0029160000, H01L0029180000, H01L0029200000, H01L0029220000, H01L0029240000
H01L0029263000	in the same semiconductor region
H01L0029267000	in different semiconductor regions
H01L0029280000	Organic materials
H01L0029300000	characterised by physical imperfections; having polished or roughened surface
H01L0029320000	the imperfections being within the semiconductor body
H01L0029340000	the imperfections being on the surface
H01L0029360000	characterised by the concentration or distribution of impurities
H01L0029380000	characterised by combination of features provided for in two or more of the groups ; H01L0029040000, H01L0029060000, H01L0029120000, H01L0029300000, H01L0029360000
H01L0029400000	characterised by their electrodes
H01L0029420000	carrying the current to be rectified, amplified, or switched and such electrodes being part of a semiconductor device which comprises one or two electrodes
H01L0029440000	characterised by their shapes, relative sizes, or dispositions
H01L0029460000	characterised by the materials of which they are formed
H01L0029480000	for surface barrier, e.g. Schottky barrier
H01L0029500000	carrying the current to be rectified, amplified, or switched and such electrodes being part of a semiconductor device which comprises three or more electrodes
H01L0029520000	characterised by their shapes, relative sizes, or dispositions
H01L0029540000	characterised by the materials of which they are formed
H01L0029560000	for surface barrier, e.g. Schottky barrier
H01L0029580000	not carrying the current to be rectified, amplified, or switched and such electrodes being part of a semiconductor device which comprises three or more electrodes
H01L0029600000	characterised by their shapes, relative sizes, or dispositions
H01L0029620000	characterised by the material of which they are formed
H01L0029640000	for surface barrier, e.g. Schottky barrier
H01L0029660000	characterised by their operation
H01L0029680000	controllable only by the electric current supplied, or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified, or switched
H01L0029700000	Bipolar devices
H01L0029720000	continuously controllable
H01L0029740000	not continuously controllable, e.g. thyristors
H01L0029743000	Reverse blocking thyristors
H01L0029747000	Bidirectional thyristors
H01L0029760000	Unipolar devices, e.g. field-effect transistors
H01L0029780000	with field effect produced by an insulated gate
H01L0029800000	with field effect produced by a PN or other rectifying junction gate
H01L0029820000	controllable only by variation of the magnetic field applied to the device
H01L0029840000	controllable only by variation of applied mechanical force, e.g. of pressure
H01L0029860000	non-controllable; controllable only by variation of the electric current supplied, or the electric potential applied, to one or more of the electrodes carrying the current to be rectified, amplified, oscillated, or switched
H01L0029880000	Tunnel diodes
H01L0029900000	Breakdown diodes, e.g. Zener diodes, avalanche diodes
H01L0029910000	Rectifier diodes
H01L0029920000	Capacitors with potential-jump barrier or surface barrier
H01L0029930000	Variable-capacitance diodes, e.g. varactors
H01L0029940000	Metal-insulator-semiconductors, e.g. MOS
H01L0029950000	Ceramic barrier-layer capacitors (ceramic capacitors in general H01G);;
H01L0029960000	controllable by methods provided for in at least two of the groups ; H01L0029680000, H01L0029820000, H01L0029840000, H01L0029860000
H01L0031000000	Semiconductor devices sensitive to infra-red radiation, light, electromagnetic radiation of shorter wavelength, or corpuscular radiation and adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus peculiar to the manufacture or treatment thereof or of parts thereof; Details thereof (devices consisting of a plurality of solid state components formed in, or on, a common substrate, other than combinations of radiation-sensitive components with one or more electric light sources, H01L0027000000;roof covering aspects of energy collecting devices E04D0013180000; production of heat using solar heat F24J0002000000; measurement of X-radiation, gamma radiation, corpuscular radiation or cosmic radiation with semiconductor detectors G01T0001240000, with resistance detectors G01T0001260000; measurement of neutron radiation with semiconductor detectors G01T0003080000; couplings of light guides with optoelectronic elements G02B0006420000; obtaining energy from radioactive sources G21H)
H01L0031020000	Details
H01L0031040000	adapted as conversion devices
H01L0031060000	characterised by at least one potential-jump barrier or surface barrier
H01L0031080000	in which radiation controls flow of current through the device, e.g. photoresistors
H01L0031100000	characterised by at least one potential-jump barrier or surface barrier, e.g. phototransistors
H01L0031120000	structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto (amplifiers using electroluminescent element and photocell H03F0017000000;electroluminescent light sources per se H05B0033000000)
H01L0031140000	the light source or sources being controlled by the semiconductor device sensitive to radiation, e.g. image converters, image amplifiers, image storage devices
H01L0031160000	the semiconductor device sensitive to radiation being controlled by the light source or sources
H01L0031180000	Processes or apparatus peculiar to the manufacture or treatment of these devices or of parts thereof (not peculiar thereto H01L0021000000);;
H01L0033000000	Semiconductor devices with at least one potential-jump barrier or surface barrier adapted for light emission, e.g. infra-red; Processes or apparatus peculiar to the manufacture or treatment thereof or of parts thereof; Details thereof (couplings of light guides with optoelectronic elements G02B0006420000;semiconductor lasers with potential-jump barrier or surface barrier H01S0003190000; electroluminescent light sources per se H05B0033000000)
H01L0035000000	Thermoelectric devices comprising a junction of dissimilar materials, i.e. exhibiting Seebeck or Peltier effect with or without other thermoelectric effects or thermomagnetic effects; Processes or apparatus peculiar to the manufacture or treatment thereof or of parts thereof; Details thereof (devices consisting of a plurality of solid state components formed in or on a common substrate H01L0027000000;refrigerating machines using electric or magnetic effects F25B0021000000; thermometers using thermoelectric or thermomagnetic elements G01K0007000000; obtaining energy from radioactive sources G21H)
H01L0035020000	Details
H01L0035040000	Structural details of the junction; Connections of leads
H01L0035060000	detachable, e.g. using a spring
H01L0035080000	non-detachable, e.g. cemented, sintered, soldered
H01L0035100000	Connections of leads
H01L0035120000	Selection of the material for the legs of the junction
H01L0035140000	using inorganic compositions
H01L0035160000	comprising tellurium or selenium or sulphur
H01L0035180000	comprising arsenic or antimony or bismuth (H01L0035160000 takes precedence);;
H01L0035200000	comprising metals only (H01L0035160000, H01L0035180000 take precedence);;
H01L0035220000	comprising compounds containing boron, carbon, oxygen, or nitrogen
H01L0035240000	using organic compositions
H01L0035260000	using compositions changing continuously or discontinuously inside the material
H01L0035280000	operating with Peltier or Seebeck effect only
H01L0035300000	characterised by the heat-exchanging means at the junction
H01L0035320000	characterised by the structure or configuration of the cell or thermo-couple forming the device
H01L0035340000	Processes or apparatus peculiar to the manufacture or treatment of these devices or of parts thereof (not peculiar thereto H01L0021000000);;
H01L0037000000	Thermoelectric devices without a junction of dissimilar materials; Thermomagnetic devices, e.g. using Nernst-Ettinghausen effect; Processes or apparatus peculiar to the manufacture or treatment thereof or of parts thereof (devices consisting of a plurality of solid state components formed in or on a common substrate H01L0027000000;thermometers using thermoelectric or thermomagnetic elements G01K0007000000; selection of materials for magnetography, e.g. for Curie-point writing G03G0005000000)
H01L0037020000	using thermal change of dielectric constant, e.g. working above and below the Curie point
H01L0037040000	using thermal change of magnetic permeability, e.g. working above and below the Curie point
H01L0039000000	Devices using superconductivity or hyperconductivity; Processes or apparatus peculiar to the manufacture or treatment thereof or of parts thereof (devices consisting of a plurality of solid state components formed in or on a common substrate H01L0027000000;superconductive or hyperconductive conductors, cables, or transmission lines H01B0012000000; superconductive coils or windings H01F; amplifiers using superconductivity H03F0019000000)
H01L0039020000	Details
H01L0039040000	Containers; Mountings
H01L0039060000	characterised by the current path
H01L0039080000	characterised by the shape of the element
H01L0039100000	characterised by the means for switching
H01L0039120000	characterised by the material
H01L0039140000	Permanent superconductor devices
H01L0039160000	Devices switchable between superconductive and normal states
H01L0039180000	Cryotrons
H01L0039200000	Power cryotrons
H01L0039220000	Devices comprising a junction of dissimilar materials, e.g. Josephson-effect devices
H01L0039240000	Processes or apparatus peculiar to the manufacture or treatment of devices provided for in group  H01L0039000000;  or of parts thereof(not peculiar thereto H01L0021000000);;
H01L0041000000	Piezo-electric devices; Electrostrictive devices; Magnetostrictive devices; Processes or apparatus peculiar to the manufacture or treatment thereof or of parts thereof; Details thereof (devices consisting of a plurality of solid state components formed in or on a common substrate H01L0027000000;use of transducers as sensing elements for measuring G01, G04; electromechanical resonators H03H; magnetostrictive transducers for electric communication H04R0015000000; piezo-electric or electrostrictive transducers for electrical communication H04R0017000000)
H01L0041020000	Details
H01L0041040000	of piezo-electric or electrostrictive devices
H01L0041060000	of magnetostrictive devices
H01L0041080000	Piezo-electric or electrostrictive devices
H01L0041120000	Magnetostrictive devices
H01L0041160000	Selection of materials
H01L0041180000	for piezo-electric or electrostrictive devices
H01L0041200000	for magnetostrictive devices
H01L0041220000	Processes or apparatus peculiar to the manufacture or treatment of these devices or of parts thereof (not peculiar thereto H01L0021000000);;
H01L0043000000	Devices using galvano-magnetic or similar magnetic effects; Processes or apparatus peculiar to the manufacture or treatment thereof or of parts thereof (devices consisting of a plurality of solid state components formed in or on a common substrate H01L0027000000;devices with potential-jump barrier or surface barrier controllable by variation of a magnetic field H01L0029820000)
H01L0043020000	Details
H01L0043040000	of Hall-effect devices
H01L0043060000	Hall-effect devices
H01L0043080000	Magnetic-field-controlled resistors
H01L0043100000	Selection of materials
H01L0043120000	Processes or apparatus peculiar to the manufacture or treatment of these devices or of parts thereof (not peculiar thereto H01L0021000000);;
H01L0043140000	for Hall-effect devices
H01L0045000000	Solid state devices adapted for rectifying, amplifying, oscillating, or switching without a potential-jump barrier or surface barrier, e.g. dielectric triodes; Ovshinsky-effect devices; Processes or apparatus peculiar to the manufacture or treatment thereof or of parts thereof (devices consisting of a plurality of solid state components formed in or on a common substrate H01L0027000000;devices using superconductivity or hyperconductivity H01L0039000000; piezo-electric devices H01L0041000000; bulk negative resistance effect devices H01L0047000000)
H01L0045020000	Solid state travelling-wave devices
H01L0047000000	Bulk negative resistance effect devices, e.g. Gunn-effect devices; Processes or apparatus peculiar to the manufacture or treatment thereof or of parts thereof (devices consisting of a plurality of solid state components formed in or on a common substrate H01L0027000000);;
H01L0047020000	Gunn-effect devices
H01L0049000000	Solid state devices not provided for in groups ; H01L0027000000-H01L0047000000 and not provided for in any other subclassProcesses or apparatus peculiar to the manufacture or treatment thereof or of parts thereof (devices consisting of a plurality of solid state devices formed in or on a common substrate H01L0027000000);;
H01L0049020000	Thin-film or thick-film devices
H01M	PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL INTO ELECTRICAL ENERGY (electrochemical processes or apparatus in general C25;semiconductor or other solid state devices for converting light or heat into electrical energy H01L, e.g. H01L0031000000, H01L0035000000, H01L0037000000)
H01M0002000000	Constructional details, or processes of manufacture, of the non-active parts
H01M0002020000	Cases, jackets, or wrappings (working of plastics or substances in a plastic state B29);;
H01M0002040000	Lids or covers
H01M0002060000	Arrangements for introducing electric connectors into or through cases
H01M0002080000	Sealing materials
H01M0002100000	Mountings; Suspension devices; Shock absorbers; Transport or carrying devices; Holders (structural combination of accumulators with charging apparatus H01M0010460000);;
H01M0002120000	Vent plugs or other mechanical arrangements for facilitating escape of gases
H01M0002140000	Separators; Membranes; Diaphragms; Spacing elements
H01M0002160000	characterised by the material
H01M0002180000	characterised by the shape
H01M0002200000	Current-conducting connections for cells
H01M0002220000	Fixed connections, i.e. not intended for disconnection
H01M0002240000	Intercell connections through partitions, e.g. in a battery case
H01M0002260000	Electrode connections
H01M0002280000	for lead-acid accumulators
H01M0002300000	Terminals
H01M0002320000	Methods or arrangements for affording protection against corrosion; Selection of materials therefor
H01M0002340000	with provision for preventing undesired use or discharge
H01M0002360000	Arrangements for filling, topping-up or emptying cases with or of liquid, e.g. for filling with electrolytes, for washing-out
H01M0002380000	Arrangements for moving electrolytes
H01M0002400000	with external circulating path (H01M0008040000 takes precedence);;
H01M0004000000	Electrodes (electrodes for electrolytic processes C25);;
H01M0004020000	Electrodes composed of, or comprising, active material
H01M0004040000	Processes of manufacture in general
H01M0004060000	Electrodes for primary cells
H01M0004080000	Processes of manufacture
H01M0004100000	of pressed electrodes with central core, i.e. dollies
H01M0004120000	of consumable metal or alloy electrodes (use of alloy compositions as active materials H01M0004380000);;
H01M0004140000	Electrodes for lead-acid accumulators
H01M0004160000	Processes of manufacture
H01M0004180000	of Plante electrodes
H01M0004200000	of pasted electrodes
H01M0004210000	Drying of pasted electrodes
H01M0004220000	Forming of electrodes
H01M0004230000	Drying or preserving electrodes after forming
H01M0004240000	Electrodes for alkaline accumulators
H01M0004260000	Processes of manufacture
H01M0004280000	Precipitating active material on the carrier
H01M0004290000	by electrochemical methods
H01M0004300000	Pressing
H01M0004320000	Nickel oxide or hydroxide electrodes
H01M0004340000	Silver oxide or hydroxide electrodes
H01M0004360000	Selection of substances as active materials, active masses, active liquids
H01M0004380000	of elements or alloys
H01M0004400000	Alloys based on alkali metals
H01M0004420000	Alloys based on zinc
H01M0004440000	Alloys based on cadmium
H01M0004460000	Alloys based on magnesium or aluminium
H01M0004480000	of inorganic oxides or hydroxides
H01M0004500000	of manganese
H01M0004520000	of nickel, cobalt, or iron
H01M0004540000	of silver
H01M0004560000	of lead
H01M0004570000	of "grey lead", i.e. powders containing lead and lead oxide
H01M0004580000	of inorganic compounds other than oxides or hydroxides
H01M0004600000	of organic compounds
H01M0004620000	Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H01M0004640000	Carriers or collectors
H01M0004660000	Selection of materials
H01M0004680000	for use in lead-acid accumulators
H01M0004700000	characterised by shape or form
H01M0004720000	Grids
H01M0004730000	for lead-acid accumulators, e.g. frame plates
H01M0004740000	Meshes or woven material; Expanded metal
H01M0004750000	Wires, rods, or strips
H01M0004760000	Containers for holding the active material, e.g. tubes, capsules
H01M0004780000	Shapes other than plane or cylindrical, e.g. helical
H01M0004800000	Porous plates, e.g. sintered carriers
H01M0004820000	Multi-step processes for manufacturing carriers for lead-acid accumulators (single-step processes, see the relevant subclasses, e.g. B21D, B22D);;
H01M0004840000	involving casting
H01M0004860000	Inert electrodes with catalytic activity, e.g. for fuel cells
H01M0004880000	Processes of manufacture
H01M0004900000	Selection of catalytic material
H01M0004920000	Metals of platinum group (H01M0004940000 takes precedence);;
H01M0004940000	Non-porous diffusion electrodes, e.g. palladium membranes, ion exchange membranes
H01M0004960000	Carbon-based electrodes
H01M0004980000	Raney-type electrodes
H01M0006000000	Primary cells; Manufacture thereof
H01M0006020000	Details (of non-active parts H01M0002000000, of electrodes H01M0004000000);;
H01M0006040000	Cells with aqueous electrolyte
H01M0006060000	Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid
H01M0006080000	with cup-shaped electrodes
H01M0006100000	with wound or folded electrodes
H01M0006120000	with flat electrodes
H01M0006140000	Cells with non-aqueous electrolyte
H01M0006160000	with organic electrolyte (H01M0006180000 takes precedence);;
H01M0006180000	with solid electrolyte
H01M0006200000	working at high temperature (deferred-action thermal cells H01M0006360000);;
H01M0006220000	Immobilising of electrolyte
H01M0006240000	Cells comprising two different electrolytes
H01M0006260000	Cells without oxidising active material, e.g. Volta cells
H01M0006280000	Standard cells, e.g. Weston cells
H01M0006300000	Deferred-action cells
H01M0006320000	activated through external addition of electrolyte or of electrolyte components
H01M0006340000	Immersion cells, e.g. sea-water cells
H01M0006360000	containing electrolyte and made operational by physical means, e.g. thermal cells (thermoelectric solid state devices H01L0035000000, H01L0037000000);;
H01M0006380000	by mechanical means
H01M0006400000	Printed batteries
H01M0006420000	Grouping of primary cells into batteries (H01M0006400000 takes precedence);;
H01M0006440000	of tubular or cup-shaped cells
H01M0006460000	of flat cells
H01M0006480000	with bipolar electrodes
H01M0006500000	Methodes or arrangements for servicing or maintenance, e.g. maintaining operating temperature
H01M0006520000	Reclaiming serviceable parts of waste cells or batteries
H01M0008000000	Fuel cells; Manufacture thereof
H01M0008020000	Details (of non-active parts H01M0002000000, of electrodes H01M0004000000);;
H01M0008040000	Auxiliary arrangements or processes, e.g. for control of pressure, for circulation of fluids
H01M0008060000	Combination of fuel cell with means for production of reactants or for treatment of residues (regenerative fuel cells H01M0008180000;production of reactants per se, see sections B or C);
H01M0008080000	Fuel cells with aqueous electrolytes
H01M0008100000	Fuel cells with solid electrolytes
H01M0008120000	operating at high temperature, e.g. with stabilised ZrO2 electrolyte
H01M0008140000	Fuel cells witz fused electrolytes
H01M0008160000	Biochemical fuel cells, i.e. cells in which micro-organisms function as catalysts
H01M0008180000	Regenerative fuel cells
H01M0008200000	Indirect fuel cells, e.g. redox cells (H01M0008180000 takes precedence);;
H01M0008220000	Fuel cells in which the fuel is based on materials comprising carbon or oxygen or hydrogen and other elements; Fuel cells in which the fuel is based on materials comprising only elements other than carbon, oxygen, or hydrogen
H01M0008240000	Grouping of fuel cells into batteries, e.g. modules
H01M0010000000	Secondary cells; Manufacture thereof
H01M0010020000	Details (of non-active parts H01M0002000000, of electrodes H01M0004000000);;
H01M0010040000	Construction or manufacture in general (H01M0010120000, H01M0010280000, H01M0010380000 take precedence);;
H01M0010060000	Lead-acid accumulators (semi-lead accumulators H01M0010200000);;
H01M0010080000	Selection of materials as electrolytes
H01M0010100000	Immobilising of electrolyte
H01M0010120000	Construction or manufacture
H01M0010140000	Assembling a group of electrodes or separators
H01M0010160000	Suspending or supporting electrodes or groups of electrodes in the case
H01M0010180000	with bipolar electrodes
H01M0010200000	Semi-lead accumulators, i.e. accumulators in which only one electrode contains lead
H01M0010220000	Selection of materials as electrolytes
H01M0010240000	Alkaline accumulators
H01M0010260000	Selection of materials as electrolytes
H01M0010280000	Construction or manufacture
H01M0010300000	Nickel accumulators (H01M0010340000 takes precedence);;
H01M0010320000	Silver accumulators (H01M0010340000 takes precedence);;
H01M0010340000	Gastight accumulators
H01M0010360000	Accumulators not provided for in groups ; H01M0010060000-H01M0010340000
H01M0010380000	Construction or manufacture
H01M0010390000	working at high temperature
H01M0010400000	with organic electrolytes
H01M0010420000	Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
H01M0010440000	Methods for charging or discharging (circuits for charging H02J0007000000);;
H01M0010460000	Accumulators structurally combined with charging apparatus (circuits for charging H02J0007000000);;
H01M0010480000	Accumulators combined with arrangements for measuring, testing, or indicating condition, e.g. level or density of the electrolyte (indicating or measuring level of liquid in general G01F0023000000;measuring density G01N, e.g. G01N0009000000; measuring electric variables G01R)
H01M0010500000	Heating or cooling or regulating temperature (control of temperature per se G05D0023000000);;
H01M0010520000	Removing gases inside the secondary cell, e.g. by absorption (vent plugs or other mechanical arrangements for facilitating escape of gases H01M0002120000);;
H01M0010540000	Reclaiming serviceable parts of waste accumulators
H01M0012000000	Hybrid cells; Manufacture thereof
H01M0012020000	Details (of non-active parts H01M0002000000, of electrodes H01M0004000000);;
H01M0012040000	composed of a half-cell of the fuel-cell type and of a half-cell of the primary-cell type (methods or arrangements for servicing or maintenance H01M0006500000);;
H01M0012060000	with one metallic and one gaseous electrode
H01M0012080000	composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type (methods or arrangements for servicing or maintenance, e.g. for charging, H01M0010420000);;
H01M0014000000	Electrochemical current or voltage generators not provided for in groups ; H01M0006000000-H01M0012000000
H01M0016000000	Structural combinations of different types of electrochemical generators
H01P	WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE (operating at optical frequencies G02B;aerials H01Q; networks comprising lumped impedance elements H03H)
H01P0001000000	Auxiliary devices (coupling devices of the waveguide type H01P0005000000);;
H01P0001020000	Bends; Corners; Twists
H01P0001040000	Fixed joints (line connectors H01R;cable fittings H02G0015000000)
H01P0001060000	Movable joints, e.g. rotating joints
H01P0001080000	Dielectric windows (coupling devices for transit-time tubes H01J0023360000);;
H01P0001100000	for switching or interrupting
H01P0001110000	by ferromagnetic devices
H01P0001120000	by mechanical chopper
H01P0001140000	by electric discharge devices (discharge devices H01J0017640000);;
H01P0001150000	by semiconductor devices
H01P0001160000	for mode selection, e.g. mode suppression or mode promotion; for mode conversion (linking dissimilar lines or devices H01P0005080000);;
H01P0001161000	sustaining two independent orthogonal modes, e.g. orthomode transducer
H01P0001162000	absorbing spurious or unwanted modes of propagation
H01P0001163000	specifically adapted for selection or promotion of the TE01 circular-electric mode
H01P0001165000	for rotating the plane of polarisation
H01P0001170000	for producing a continuously rotating polarisation, e.g. circular polarisation
H01P0001175000	using Faraday rotators
H01P0001180000	Phase-shifters (H01P0001165000 takes precedence;coupling devices with variable coupling factor H01P0005040000)
H01P0001185000	using a diode or a gas filled discharge tube
H01P0001190000	using a ferromagnetic device
H01P0001195000	having a toroidal shape
H01P0001200000	Frequency-selective devices, e.g. filters (resonators H01P0007000000);;
H01P0001201000	Transverse electromagnetic filters (H01P0001212000, H01P0001213000, H01P0001215000, H01P0001219000 take precedence);;
H01P0001202000	Coaxial filters (cascaded coaxial cavities H01P0001205000);;
H01P0001203000	Strip line filters
H01P0001205000	Comb or interdigital filters; Cascaded coaxial cavities (H01P0001203000 takes precedence);;
H01P0001207000	Hollow waveguide filters (H01P0001212000, H01P0001213000, H01P0001215000, H01P0001219000 take precedence);;
H01P0001208000	Cascaded cavities; Cascaded resonators inside a hollow waveguide structure (H01P0001205000 takes precedence);;
H01P0001209000	comprising one or more branching arms or cavities wholly outside the main waveguide
H01P0001211000	Waffle-iron filters; Corrugated structures
H01P0001212000	suppressing or attenuating harmonic frequencies (H01P0001215000 takes precedence);;
H01P0001213000	combining or separating two or more different frequencies (H01P0001215000 takes precedence);;
H01P0001215000	using ferromagnetic material
H01P0001217000	the ferromagnetic material acting as a tuning element in resonators
H01P0001218000	the ferromagnetic material acting as a frequency selective coupling element, e.g. YIG-filters
H01P0001219000	Evanescent mode filters
H01P0001220000	Attenuating devices (dissipative terminating devices H01P0001260000);;
H01P0001230000	using ferromagnetic material
H01P0001240000	Terminating devices
H01P0001260000	Dissipative terminations
H01P0001280000	Short-circuiting plungers (coupling devices with variable coupling factor H01P0005040000);;
H01P0001300000	for compensation of, or protection against, temperature or moisture effects
H01P0001320000	Non-reciprocal transmission devices (H01P0001020000-H01P0001300000;  take precedence);;
H01P0001360000	Isolators
H01P0001365000	Resonance absorption isolators
H01P0001370000	Field displacement isolators
H01P0001375000	using Faraday rotators
H01P0001380000	Circulators
H01P0001383000	Junction circulators, e.g. Y-circulators
H01P0001387000	Strip line circulators
H01P0001390000	Hollow waveguide circulators
H01P0001393000	using Faraday rotators
H01P0001397000	using non-reciprocal phase shifters (H01P0001393000 takes precedence);;
H01P0003000000	Waveguides; Transmission lines of the waveguide type
H01P0003020000	with two longitudinal conductors
H01P0003040000	Lines formed as Lecher wire pairs
H01P0003060000	Coaxial lines (not suitable for handling frequencies considerably beyond the audio range H01B0011180000);;
H01P0003080000	Microstrips; Strip lines
H01P0003100000	Wire waveguides, i.e. with a single solid longitudinal conductor
H01P0003120000	Hollow waveguides (H01P0003200000 takes precedence);;
H01P0003123000	with a complex or stepped cross-section, e.g. ridged or grooved waveguides (H01P0003140000 takes precedence);;
H01P0003127000	with a circular, elliptic, or parabolic cross-section
H01P0003130000	specially adapted for transmission of the TE01 circular-electric mode
H01P0003140000	flexible
H01P0003160000	Dielectric waveguides, i.e. without a longitudinal conductor
H01P0003180000	built-up from several layers to increase operating surface, i.e. alternately conductive and dielectric layers
H01P0003200000	Quasi-optical arrangements for guiding a wave, e.g. focusing by dielectric lenses (quasi-optical devices per se H01Q0015000000);;
H01P0005000000	Coupling devices of the waveguide type (non-reciprocal devices H01P0001320000;for introducing or removing wave energy to or from the discharge in transit-time tubes H01J0023360000)
H01P0005020000	with invariable factor of coupling (H01P0005120000 takes precedence);;
H01P0005040000	with variable factor of coupling
H01P0005080000	for linking dissimilar lines or devices (H01P0001160000, H01P0005040000 take precedence;linking lines of the same kind but with different dimensions H01P0005020000)
H01P0005100000	for coupling balanced with unbalanced lines or devices
H01P0005103000	Hollow-waveguide/coaxial-line transitions
H01P0005107000	Hollow-waveguide/strip-line transitions
H01P0005120000	Coupling devices having more than two ports (H01P0005040000 takes precedence);;
H01P0005160000	Conjugate devices, i.e. devices having at least one port decoupled from one other port
H01P0005180000	consisting of two coupled guides, e.g. directional couplers
H01P0005190000	of the junction type
H01P0005200000	Magic-T junctions
H01P0005220000	Hybrid ring junctions
H01P0007000000	Resonators of the waveguide type (structurally associated with transit-time tubes and interacting with the discharge therein H01J0023180000;microwave heating devices H05B0006640000)
H01P0007020000	Lecher resonators
H01P0007040000	Coaxial resonators
H01P0007060000	Cavity resonators
H01P0007080000	Strip line resonators
H01P0007100000	Dielectric resonators
H01P0009000000	Delay lines of the waveguide type (structurally associated with transit-time tubes and interacting with the discharge therein H01J0023240000);;
H01P0009020000	Helical lines
H01P0009040000	Interdigital lines
H01P0011000000	Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type (manufacture of coaxial cables H01B0013000000);;
H01Q	AERIALS (microwave radiators for near-field therapeutic treatment A61N0005040000;apparatus for testing aerials or for measuring aerial characteristics G01R; waveguides H01P; radiators or aerials for microwave heating H05B0006720000)
H01Q0001000000	Details of, or arrangements associated with, aerials (arrangements for varying orientation of directional pattern H01Q0003000000);;
H01Q0001020000	Arrangements for de-icing; Arrangements for drying-out
H01Q0001040000	Adaptation for subterranean or subaqueous use
H01Q0001060000	Means for the lighting or illuminating of aerials, e.g. for purpose of warning
H01Q0001080000	Means for collapsing aerials or parts thereof (collapsible loop aerials H01Q0007020000;collapsible H-aerials or Yagi aerials H01Q0019040000)
H01Q0001100000	Telescopic elements
H01Q0001120000	Supports; Mounting means (supporting conductors in general H02G0007000000);;
H01Q0001140000	for wire or other non-rigid radiating elements
H01Q0001160000	Strainers, spreaders, or spacers
H01Q0001180000	Means for stabilising aerials on an unstable platform
H01Q0001200000	Resilient mountings
H01Q0001220000	by structural association with other equipment or articles
H01Q0001240000	with receiving set
H01Q0001260000	with electric discharge tube
H01Q0001270000	Adaptation for use in or on movable bodies (H01Q0001080000, H01Q0001120000, H01Q0001180000 take precedence);;
H01Q0001280000	Adaptation for use in or on aircraft, missiles, satellites, or balloons
H01Q0001300000	Means for trailing aerials
H01Q0001320000	Adaptation for use in or on road or rail vehicles (telescopic elements H01Q0001100000;resilient mountings for aerials H01Q0001200000)
H01Q0001340000	Adaptation for use in or on ships, submarines, buoys, or torpedoes (for subaqueous use H01Q0001040000;retractable loop aerials H01Q0007020000)
H01Q0001360000	Structural form of radiating elements, e.g. cone, spiral, umbrella (H01Q0001080000, H01Q0001140000 take precedence);;
H01Q0001380000	formed by a conductive layer on an insulating support (conductors in general H01B0005140000);;
H01Q0001400000	Radiating elements coated with, or embedded in, protective material
H01Q0001420000	Housings not intimately mechanically associated with radiating elements, e.g. radome
H01Q0001440000	using equipment having another main function to serve additionally as an aerial (H01Q0001280000-H01Q0001340000;  take precedence);;
H01Q0001460000	Electric supply lines or communication lines
H01Q0001480000	Earthing means; Earth screens; Counterpoises (earthing pins H01R0004660000);;
H01Q0001500000	Structural association of aerials with earthing switches, lead-in devices, or lightning protectors (lead-in devices H01B;lightning protectors, switches H01H)
H01Q0001520000	Means for reducing coupling between aerials; Means for reducing coupling between an aerial and another structure (absorbing means H01Q0017000000);;
H01Q0003000000	Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an aerial or aerial system
H01Q0003010000	varying the shape of the aerial or aerial system
H01Q0003020000	using mechanical movement of aerial or aerial system as a whole
H01Q0003040000	for varying one co-ordinate of the orientation
H01Q0003060000	over a restricted angle
H01Q0003080000	for varying two co-ordinates of the orientation
H01Q0003100000	to produce a conical or spiral scan
H01Q0003120000	using mechanical relative movement between primary active elements and secondary devices of aerials or aerial systems
H01Q0003140000	for varying the relative position of primary active element and a refracting or diffracting device
H01Q0003160000	for varying relative position of primary active element and a reflecting device
H01Q0003180000	wherein the primary active element is movable and the reflecting device is fixed
H01Q0003200000	wherein the primary active element is fixed and the reflecting device is movable
H01Q0003220000	varying the orientation in accordance with variation of frequency of radiated wave
H01Q0003240000	varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
H01Q0003260000	varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture (H01Q0003220000, H01Q0003240000 take precedence);;
H01Q0003280000	varying the amplitude
H01Q0003300000	varying the phase
H01Q0003320000	by mechanical means
H01Q0003340000	by electrical means (active lenses or reflecting arrays H01Q0003460000);;
H01Q0003360000	with variable phase-shifters
H01Q0003380000	the phase-shifters being digital
H01Q0003400000	with phasing matrix
H01Q0003420000	using frequency-mixing
H01Q0003440000	varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element
H01Q0003460000	Active lenses or reflecting arrays
H01Q0005000000	Arrangements for simultaneous operation of aerials on two or more different wavebands (length of elements adjustable H01Q0009140000;combinations of separate active aerial units operating in different wavebands and connected to a common feeder system H01Q0021300000)
H01Q0005010000	Resonant aerials
H01Q0005020000	for operation of centre-fed aerials which comprise a single, or two or more collinear, substantially straight elongated active elements
H01Q0007000000	Loop aerials with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
H01Q0007020000	Collapsible aerials; Retractable aerials
H01Q0007040000	Screened aerials (H01Q0007020000, H01Q0007060000 take precedence);;
H01Q0007060000	with core of ferromagnetic material (H01Q0007020000 takes precedence);;
H01Q0007080000	Ferrite rod or like elongated core
H01Q0009000000	Electrically-short aerials having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements (loop aerials H01Q0007000000;waveguide horns or mouths H01Q0013000000; slot aerials H01Q0013000000; combinations of active elements with secondary devices to give desired directional characteristic H01Q0019000000; combinations of two or more active elements H01Q0021000000)
H01Q0009020000	Non-resonant aerials
H01Q0009040000	Resonant aerials
H01Q0009060000	Details
H01Q0009080000	Junction boxes specially adapted for supporting adjacent ends of collinear rigid elements
H01Q0009100000	Junction boxes specially adapted for supporting adjacent ends of divergent elements
H01Q0009120000	adapted for adjustment of angle between elements
H01Q0009140000	Length of element or elements adjustable (telescopic elements H01Q0001100000);;
H01Q0009160000	with feed intermediate between the extremities of the aerial, e.g. centre-fed dipole (H01Q0009440000 takes precedence);;
H01Q0009180000	Vertical disposition of the aerial
H01Q0009200000	Two collinear substantially straight active elements; Substantially straight single active elements (H01Q0009280000 takes precedence);;
H01Q0009220000	Rigid rod or equivalent tubular element or elements
H01Q0009240000	Shunt feed arrangements to single active elements, e.g. for delta matching
H01Q0009260000	with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength (resonant loop aerials H01Q0007000000);;
H01Q0009270000	Spiral aerials
H01Q0009280000	Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines (biconical horns H01Q0013040000);;
H01Q0009300000	with feed to end of elongated active element, e.g. unipole (H01Q0009440000 takes precedence);;
H01Q0009320000	Vertical arrangement of element (H01Q0009400000 takes precedence);;
H01Q0009340000	Mast, tower, or like self-supporting or stay-supported aerials
H01Q0009360000	with top loading
H01Q0009380000	with counterpoise (with counterpoise comprising elongated elements coplanar with the active element H01Q0009440000);;
H01Q0009400000	Element having extended radiating surface
H01Q0009420000	with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
H01Q0009430000	Scimitar aerials
H01Q0009440000	with plurality of divergent straight elements, e.g. V-dipole, X-aerial; with plurality of elements having mutually inclined substantially straight portions (turnstile aerials H01Q0021260000);;
H01Q0009460000	with rigid elements diverging from single point
H01Q0011000000	Electrically-long aerials having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements (leaky-waveguide aerials, slot aerials H01Q0013000000;combinations of active elements with secondary devices to give desired directional characteristic H01Q0019000000; aerial arrays or systems H01Q0021000000)
H01Q0011020000	Non-resonant aerials, e.g. travelling-wave aerial
H01Q0011040000	with parts bent, folded, shaped, screened, or electrically loaded to obtain desired phase relation of radiation from selected sections of the aerial (rhombic aerials, V-aerials H01Q0011060000);;
H01Q0011060000	Rhombic aerials; V-aerials
H01Q0011080000	Helical aerials
H01Q0011100000	Log-periodic aerials (H01Q0011080000 takes precedence);;
H01Q0011120000	Resonant aerials
H01Q0011140000	with parts bent, folded, shaped, or screened, or with phasing impedances, to obtain desired phase relation of radiation from selected sections of the aerial or to obtain desired polarisation effects
H01Q0011160000	in which the selected sections are collinear
H01Q0011180000	in which the selected sections are parallelly spaced
H01Q0011200000	V-aerials
H01Q0013000000	Waveguide horns or mouths; Slot aerials; Leaky-waveguide aerials; Equivalent structures causing radiation along the transmission path of a guided wave (multimode aerials H01Q0025040000);;
H01Q0013020000	Waveguide horns
H01Q0013040000	Biconical horns (biconical dipoles comprising two conical surfaces having collinear axes and adjacent apices and fed by a two-conductor transmission line H01Q0009280000);;
H01Q0013060000	Waveguide mouths (horns H01Q0013020000);;
H01Q0013080000	Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
H01Q0013100000	Resonant slot aerials
H01Q0013120000	Longitudinally slotted cylinder aerials; Equivalent structures
H01Q0013140000	Skeleton cylinder aerials
H01Q0013160000	Folded slot aerials
H01Q0013180000	the slot being backed by, or formed in boundary wall of, a resonant cavity (longitudinally slotted cylinder H01Q0013120000);;
H01Q0013200000	Non-resonant leaky-waveguide or transmission-line aerials; Equivalent structures causing radiation along the transmission path of a guided wave
H01Q0013220000	Longitudinal slot in boundary wall of waveguide or transmission line
H01Q0013240000	constituted by a dielectric or ferromagnetic rod or pipe (H01Q0013280000 takes precedence);;
H01Q0013260000	Surface waveguide constituted by a single conductor, e.g. strip conductor
H01Q0013280000	comprising elements constituting electric discontinuities and spaced in direction of wave propagation, e.g. dielectric elements, conductive elements forming artificial dielectric (Yagi aerials H01Q0019300000);;
H01Q0015000000	Devices for reflection, refraction, diffraction, or polarisation of waves radiated from an aerial, e.g. quasi-optical devices (variable for purpose of altering directivity H01Q0003000000;arrangements of such devices for guiding waves H01P0003200000; variable for purpose of modulation H03C0007020000)
H01Q0015020000	Refracting or diffracting devices, e.g. lens, prism
H01Q0015040000	comprising wave-guiding channel or channels bounded by effective conductive surfaces substantially perpendicular to the electric vector of the wave, e.g. parallel-plate waveguide lens
H01Q0015060000	comprising plurality of wave-guiding channels of different length
H01Q0015080000	formed of solid dielectric material
H01Q0015100000	comprising three-dimensional array of impedance discontinuities, e.g. holes in conductive surfaces or conductive discs forming artificial dielectric (leaky-waveguide aerials H01Q0013280000);;
H01Q0015120000	functioning also as polarisation filter
H01Q0015140000	Reflecting surfaces; Equivalent structures
H01Q0015160000	curved in two dimensions, e.g. paraboloidal
H01Q0015180000	comprising plurality of mutually inclined plane surfaces, e.g. corner reflector
H01Q0015200000	Collapsible reflectors
H01Q0015220000	functioning also as polarisation filter
H01Q0015230000	Combinations of reflecting surfaces with refracting or diffracting devices
H01Q0015240000	Polarising devices; Polarisation filters (devices functioning simultaneously both as polarisation filters and as refracting or diffracting devices or as reflectors H01Q0015120000, H01Q0015220000);;
H01Q0017000000	Devices for absorbing waves radiated from an aerial; Combinations of such devices with active aerial elements or systems
H01Q0019000000	Combinations of primary active aerial elements and units with secondary devices, e.g. with quasi-optical devices, for giving the aerial a desired directional characteristic
H01Q0019020000	Details
H01Q0019040000	Means for collapsing H-aerials or Yagi aerials
H01Q0019060000	using refracting or diffracting devices, e.g. lens
H01Q0019080000	for modifying the radiation pattern of a radiating horn in which it is located
H01Q0019090000	wherein the primary active element is coated with or embedded in a dielectric or magnetic material (protective material H01Q0001400000;with variable characteristics H01Q0003440000)
H01Q0019100000	using reflecting surfaces
H01Q0019120000	wherein the surfaces are concave (H01Q0019180000 takes precedence);;
H01Q0019130000	the primary radiating source being a single radiating element, e.g. a dipole, a slot, a waveguide termination (H01Q0019150000 takes precedence);;
H01Q0019150000	the primary radiating source being a line source, e.g. leaky waveguide aerials
H01Q0019170000	the primary radiating source comprising two or more radiating elements (H01Q0019150000, H01Q0025000000 take precedence);;
H01Q0019180000	having two or more spaced reflecting surfaces (producing pencil beam by two cylindrical reflectors with their focal lines orthogonally disposed H01Q0019200000);;
H01Q0019185000	wherein the surfaces are plane
H01Q0019190000	comprising one main concave reflecting surface associated with an auxiliary reflecting surface
H01Q0019195000	wherein a reflecting surface acts also as a polarisation filter or a polarising device
H01Q0019200000	Producing pencil beam by two cylindrical focusing devices with their focal lines orthogonally disposed
H01Q0019220000	using a secondary device in the form of a single substantially straight conductive element
H01Q0019240000	the primary active element being centre-fed and substantially straight, e.g. H-aerial
H01Q0019260000	the primary active element being end-fed and elongated
H01Q0019280000	using a secondary device in the form of two or more substantially straight conductive elements (log-periodic aerials H01Q0011100000;constituting a reflecting surface H01Q0019100000)
H01Q0019300000	the primary active element being centre-fed and substantially straight, e.g. Yagi aerial
H01Q0019320000	the primary active element being end-fed and elongated
H01Q0021000000	Aerial arrays or systems (producing a beam the orientation or the shape of the directional pattern of which can be changed or varied H01Q0003000000;electrically-long aerials H01Q0011000000)
H01Q0021060000	Arrays of individually energised aerial units similarly polarised and spaced apart
H01Q0021080000	the units being spaced along, or adjacent to, a rectilinear path
H01Q0021100000	Collinear arrangements of substantially straight elongated conductive units
H01Q0021120000	Parallel arrangements of substantially straight elongated conductive units (travelling-wave aerials comprising transmission line loaded with transverse elements, e.g. "fishbone" aerial, H01Q0011040000);;
H01Q0021140000	Adcock aerials
H01Q0021160000	U-type
H01Q0021180000	H-type
H01Q0021200000	the units being spaced along, or adjacent to, a curvilinear path
H01Q0021220000	Aerial units of the array energised non-uniformly in amplitude or phase, e.g. tapered array, binomial array
H01Q0021240000	Combinations of aerial units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
H01Q0021260000	Turnstile or like aerials comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
H01Q0021280000	Combinations of substantially independent non-interacting aerial units or systems
H01Q0021290000	Combinations of different interacting aerial units for giving a desired directional characteristic (H01Q0025000000 takes precedence);;
H01Q0021300000	Combinations of separate aerial units operating in different wavebands and connected to a common feeder system
H01Q0023000000	Aerials with active circuits or circuit elements integrated within them or attached to them
H01Q0025000000	Aerials or aerial systems providing at least two radiating patterns (arrangements for changing or varying the orientation or the shape of the directional pattern H01Q0003000000);;
H01Q0025020000	providing sum and difference patterns (multimode aerials H01Q0025040000);;
H01Q0025040000	Multimode aerials
H01R	LINE CONNECTORS; CURRENT COLLECTORS (switches, fuses H01H;coupling devices of the waveguide type H01P0005000000; switchboards, distribution gear H02B; installations of electric lines, cables, or auxiliary apparatus H02G; printed means for providing electric connections to or between printed circuits H05K)
H01R0003000000	Electrically-conductive connections not otherwise provided for
H01R0003080000	for making connection to a liquid (electrodes for batteries or accumulators H01M);;
H01R0004000000	Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another, and means for effecting or maintaining such contact (details of disengageable contacts of two-part coupling devices H01R0013000000;two-part coupling devices H01R0015000000-H01R0029000000, H01R0033000000; flexible or turnable line connectors H01R0035000000;  non-rotary current collectors H01R0041000000)
H01R0004020000	Soldered or welded connections
H01R0004040000	using electrically conductive adhesives
H01R0004060000	Riveted connections (by explosion H01R0004080000);;
H01R0004080000	effected by an explosion
H01R0004100000	effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
H01R0004120000	by twisting
H01R0004140000	by wrapping
H01R0004160000	by bending
H01R0004180000	by crimping (H01R0004240000 takes precedence);;
H01R0004200000	using a crimping sleeve
H01R0004220000	End caps, i.e. caps of insulating or conductive material for covering or maintaining connections between wires entering the cap from the same end
H01R0004240000	Needle-point, slotted-plate, or analogous contact members penetrating insulating or cable strands
H01R0004260000	Connections in which at least one of the connecting parts has projections which bite into or engage the other connecting part in order to improve the contact
H01R0004280000	Clamped connections, spring connections
H01R0004300000	using a screw or nut clamping member (H01R0004500000 takes precedence;using a clamping member acted on by screw or nut H01R0004380000)
H01R0004320000	Conductive members located in slot or hole in screw
H01R0004340000	Conductive members located under head of screw
H01R0004360000	Conductive members located under tip of screw
H01R0004380000	using a clamping member acted on by screw or nut (H01R0004500000 takes precedence);;
H01R0004400000	Pivotable clamping member
H01R0004420000	Clamping area to one side of screw only
H01R0004440000	Clamping areas on both sides of screw
H01R0004460000	Clamping area between two screws placed side by side
H01R0004480000	using a spring, clip or other resilient member (H01R0004520000 takes precedence);;
H01R0004500000	using a cam, wedge, cone or ball
H01R0004520000	which is spring loaded
H01R0004540000	Bayonet or keyhole
H01R0004560000	one conductor screwing into another
H01R0004580000	characterised by the form or material of the contacting members
H01R0004600000	Connections between or with tubular conductors (H01R0004560000 takes precedence);;
H01R0004620000	Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors (H01R0004680000 takes precedence);;
H01R0004640000	Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
H01R0004660000	Connections with the terrestrial mass, e.g. earth plate, earth pin
H01R0004680000	Connections to or between superconductive conductors
H01R0004700000	Insulation of connections (end caps H01R0004220000);;
H01R0004720000	using a heat shrinking insulating sleeve
H01R0009000000	Connectors or connecting arrangements providing a plurality of mutually-insulated connections; Terminals or binding posts mounted upon a base or in a case; Terminal strips; Terminal blocks (details of direct connections H01R0004000000;two-part coupling devices H01R0015000000-H01R0029000000, H01R0033000000; flexible or turnable line connectors H01R0035000000)
H01R0009030000	Connectors arranged to contact a plurality of the conductors of a multiconductor cable
H01R0009050000	for coaxial cables
H01R0009070000	for flat or ribbon cables
H01R0009090000	Connectors for printed circuits (printed connections to or between printed circuits H05K);;
H01R0009110000	End pieces for multiconductor cables supported by the cable and for facilitating connections to other conductive members
H01R0009150000	Connectors for wire wrapping
H01R0009160000	Fastening of connecting parts to base or case; Insulating connecting parts from base or case (lead-through insulators H01B0017260000);;
H01R0009180000	Fastening by means of screw or nut
H01R0009200000	Fastening by means of rivet or eyelet
H01R0009220000	Bases, e.g. strip, block, panel
H01R0009240000	Terminal blocks
H01R0009260000	Clip-on terminal blocks for side-by-side railor strip-mounting
H01R0009280000	Terminal boards
H01R0011000000	Connectors providing two or more spaced connecting locations for conductive members which are thereby interconnected; End pieces for wires or cables, supported by the wire or cable and for facilitating electrical connection to some other wire, terminal, or conductive member (H01R0004000000, H01R0009000000 take precedence;two-part coupling devices H01R0015000000-H01R0029000000, H01R0033000000; flexible or turnable line connectors H01R0035000000)
H01R0011010000	characterised by the form or arrangement of the conductive interconnection between the connecting locations
H01R0011030000	characterised by the relationship between the connecting locations (H01R0011110000 takes precedence);;
H01R0011050000	the connecting locations having different types of direct connections
H01R0011070000	the connecting locations being of the same type but different sizes
H01R0011090000	the connecting locations being identical
H01R0011110000	End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal, or conductive member (H01R0011010000 takes precedence;for multiconductor cables H01R0009110000)
H01R0011120000	End pieces terminating in an eye, hook, or fork
H01R0011140000	the hook being adapted for hanging on overhead or other suspended lines, e.g. hot line clamp
H01R0011150000	Hook in the form of a screw clamp
H01R0011160000	End pieces terminating in a soldering tip or socket
H01R0011180000	End pieces terminating in a probe
H01R0011200000	End pieces terminating in a needle point or analogous contact for penetrating insulation or cable strands
H01R0011220000	End pieces terminating in a spring clip
H01R0011240000	with gripping jaws, e.g. crocodile clip
H01R0011260000	End pieces terminating in a screw clamp, screw or nut
H01R0011280000	End pieces consisting of a ferrule or sleeve
H01R0011300000	End pieces held in contact by a magnet
H01R0011320000	End pieces with two or more terminations
H01R0013000000	Details of coupling devices of the kinds covered by groups ; H01R0015000000-H01R0033000000
H01R0013020000	Contact members
H01R0013030000	characterised by the material, e.g. plating or coating materials
H01R0013040000	Pins or blades for co-operation with sockets
H01R0013050000	Resilient pins or blades (carrying separate resilient parts H01R0013150000);;
H01R0013080000	Resiliently-mounted rigid pins or blades
H01R0013100000	Sockets for co-operation with pins or blades
H01R0013110000	Resilient sockets (carrying separate resilient parts H01R0013150000);;
H01R0013115000	U-shaped sockets having inwardly-bent legs
H01R0013140000	Resiliently-mounted rigid sockets
H01R0013150000	Pins, blades or sockets having separate spring member for producing or increasing contact pressure
H01R0013170000	the spring member being on the pin
H01R0013180000	with the spring member surrounding the socket
H01R0013187000	the spring member being in the socket
H01R0013193000	Means for increasing contact pressure at the end of engagement of coupling part
H01R0013200000	Pins, blades, or sockets shaped, or provided with separate member, to retain co-operating parts together
H01R0013207000	by screw-in connection
H01R0013213000	by bayonet connection
H01R0013220000	Contacts for co-operating by abutting
H01R0013240000	resilient; resiliently mounted
H01R0013260000	Pin or blade contacts for sliding co-operation on one side only
H01R0013280000	Contacts for sliding co-operation with identically-shaped contact, e.g. for hermaphroditic coupling devices
H01R0013330000	Contact members made of resilient wire
H01R0013350000	for non-simultaneous co-operation with different types of contact member, e.g. socket co-operating with either round or flat pin
H01R0013400000	Securing contact members in or to a base or case; Insulating of contact members
H01R0013405000	Securing in non-demountable manner, e.g. moulding, riveting
H01R0013410000	by frictional grip in grommet, panel or base
H01R0013415000	by permanent deformation of contact member
H01R0013420000	Securing in a demountable manner
H01R0013422000	in resilient one-piece base or case; One-piece base or case formed with resilient locking means
H01R0013424000	in base or case composed of a plurality of insulating parts having at least one resilient insulating part
H01R0013426000	by separate resilient retaining piece supported by base or case, e.g. collar
H01R0013428000	by resilient locking means on the contact members; by locking means on resilient contact members
H01R0013432000	by stamped-out resilient tongue snapping behind shoulder in base or case
H01R0013434000	by separate resilient locking means on contact member, e.g. retainer collar or ring around contact member
H01R0013436000	Securing a plurality of contact members by one locking piece
H01R0013440000	Means for preventing access to live contacts
H01R0013447000	Shutter or cover plate
H01R0013453000	Shutter or cover plate opened by engagement of counterpart
H01R0013460000	Bases; Cases
H01R0013500000	formed as an integral body (H01R0013514000 takes precedence);;
H01R0013502000	composed of different pieces (H01R0013514000 takes precedence);;
H01R0013504000	different pieces being moulded, cemented, welded, e.g. ultra-sonic, or swaged together
H01R0013506000	assembled by snap action of the parts
H01R0013508000	assembled by clip or spring
H01R0013512000	assembled by screw or screws
H01R0013514000	formed as a modular block or assembly, i.e. composed of co-operating parts provided with contact members or holding contact members between them
H01R0013516000	Means for holding or embracing insulating body, e.g. casing
H01R0013518000	for holding or embracing several coupling parts, e.g. frames
H01R0013520000	Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
H01R0013523000	for use under water
H01R0013527000	Flameproof cases (H01R0013700000 takes precedence);;
H01R0013530000	Bases or cases for heavy duty; Bases or cases with means for preventing corona or arcing
H01R0013533000	Bases or cases made for use in extreme conditions, e.g. high temperature, radiation, vibration, corrosive environment, pressure (H01R0013520000 takes precedence);;
H01R0013560000	Means for preventing chafing or fracture of flexible leads at outlet from coupling part
H01R0013580000	Means for relieving strain on wire connection, e.g. cord grip
H01R0013585000	Grip increasing with strain force
H01R0013590000	Threaded ferrule or bolt operating in a direction parallel to the cable or wire
H01R0013595000	Bolts operating in a direction transverse to the cable or wire
H01R0013600000	Means for supporting coupling part when not engaged
H01R0013620000	Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
H01R0013621000	Bolt or threaded ferrule (H01R0013623000 takes precedence);;
H01R0013623000	Ferrule with helicoidal groove
H01R0013625000	Bayonet engagement
H01R0013627000	Snap-action fastening
H01R0013629000	Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure
H01R0013631000	for engagement only
H01R0013633000	for disengagement only
H01R0013635000	by mechanical pressure, e.g. spring force
H01R0013637000	by fluid pressure, e.g. explosion
H01R0013639000	Additional means for holding or locking coupling parts together after engagement
H01R0013640000	Means for preventing incorrect coupling
H01R0013642000	by position or shape of contact members
H01R0013645000	by exchangeable elements on case or base
H01R0013648000	Protective earth or shield arrangements on coupling devices
H01R0013652000	with earth pin, blade or socket
H01R0013655000	with earth brace
H01R0013658000	High frequency shielding arrangements (two-pole coaxial coupling devices specially adapted for high frequency H01R0017120000);;
H01R0013660000	Structural association with built-in electrical component
H01R0013680000	with built-in fuse
H01R0013700000	with built-in switch
H01R0013703000	operated by engagement or disengagement of coupling parts (H01R0013710000 takes precedence);;
H01R0013707000	interlocked with contact members or counterpart
H01R0013710000	Contact members of coupling parts operating as switch
H01R0013713000	the switch being a safety switch
H01R0013717000	with built-in light bulb
H01R0013719000	specially adapted for high frequency
H01R0013720000	Means for accommodating flexible lead within the holder
H01R0013730000	Means for mounting coupling parts to apparatus or structures, e.g. to a wall
H01R0013740000	for mounting coupling parts in openings of a panel
H01R0015000000	Two-part coupling devices having a single pole, with or without additional protective earth connection (with a holder adapted for supporting apparatus to which its counterpart is attached H01R0033020000);;
H01R0015080000	Pin-carrying coupling parts, e.g. banana-type plug
H01R0015100000	Socket-carrying coupling parts
H01R0015120000	wherein one coupling part is secured only to a wire or cable and the other part is secured to apparatus or structure
H01R0017000000	Two-part coupling devices having two poles, with or without additional protective earth connection; Separate parts thereof (H01R0019000000 takes precedence;with a holder adapted for supporting apparatus to which its counterpart is attached H01R0033000000)
H01R0017040000	having concentrically or coaxially-arranged contacts of different diameters
H01R0017120000	specially adapted for high frequency
H01R0017180000	having the contacts of each coupling part arranged in line parallel with the direction of coupling-engaging motion, e.g. telephone-jack type
H01R0019000000	Two-part coupling devices having two poles, with or without additional protective earth connection, and with two current-carrying pins, blades, or analogous contacts, having their axes parallel to each other and slidingly co-operating with separate sockets, clips, or analogous counter-contacts; Separate parts thereof (with a holder adapted for supporting apparatus to which its counterpart is attached H01R0033050000);;
H01R0019040000	Coupling parts carrying two pins, blades, or analogous contacts, and secured only to wires or cables
H01R0019060000	with additional earth or shield contact
H01R0019080000	the additional contact being formed as pin or socket contact
H01R0019160000	Coupling parts carrying two pins, blades, or analogous contacts, and secured to apparatus or structures, e.g. to a wall
H01R0019180000	with additional earth or shield contact
H01R0019200000	the additional contact formed as pin or socket contact
H01R0019280000	Coupling parts carrying two sockets, clips, or analogous counter-contacts, and secured only to wires or cables
H01R0019300000	with additional earth or shield contact
H01R0019320000	the additional contact formed as pin or socket contact
H01R0019400000	Coupling parts carrying two sockets, clips, or analogous counter-contacts, and secured to apparatus or structures, e.g. to a wall
H01R0019420000	with additional earth or shield contact
H01R0019440000	the additional contact formed as pin or socket contact
H01R0021000000	Two-part coupling devices having three poles, with or without additional protective earth connection, e.g. for three-phase circuits; Separate parts thereof (with a holder adapted for supporting apparatus to which its counterpart is attached H01R0033720000);;
H01R0021220000	having the contacts of each coupling part arranged in line parallel with the direction of coupling-engaging motion, e.g. telephone-jack type
H01R0023000000	Two-part coupling devices having four or more poles, with or without additional protective earth connection; Separate parts thereof (with a holder adapted for supporting apparatus to which its counterpart is attached H01R0033740000);;
H01R0023020000	having parallelly-arranged contacts for sliding engagement with their counter-contacts
H01R0023100000	wherein one coupling part is secured to wire or cable and the other part is secured to apparatus or structure, e.g. connectors comprising a plug and lead-through socket
H01R0023260000	having concentrically or coaxially arranged contacts
H01R0023270000	Hermaphroditic coupling devices
H01R0023660000	for connection to or between flat or ribbon cables
H01R0023680000	for connection to or between printed circuits
H01R0023700000	co-operating with the edge of the printed circuit or with a counterpart provided on the edge of the printed circuit
H01R0023720000	co-operating with the surface of the printed circuit or with a counterpart provided on the surface of the printed circuit (H01R0023700000 takes precedence);;
H01R0025000000	Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits (supported only by co-operation with a counterpart H01R0031000000;with a holder adapted for supporting apparatus to which its counterpart is attached H01R0033880000)
H01R0025140000	Rails or bus-bars constructed so that the counterparts can be connected thereto at any point along their length (installations of bus-bars H02G0005000000);;
H01R0025160000	Rails or bus-bars provided with a plurality of discrete connecting locations for counterparts (installations of bus-bars H02G0005000000);;
H01R0027000000	Coupling parts adapted for co-operation with two or more dissimilar counterparts (supported only by co-operation with a counterpart H01R0031000000;with a holder adapted for supporting apparatus to which its counterpart is attached H01R0033900000)
H01R0027020000	for simultaneous co-operation with two or more counterparts
H01R0029000000	Coupling parts for selective co-operation with a counterpart in different ways to establish different circuits, e.g. for voltage selection, for series/parallel selection
H01R0031000000	Coupling parts supported only by co-operation with counterpart
H01R0031020000	Intermediate parts for distributing energy to two or more circuits in parallel, e.g. splitter (for linking two coupling parts H01R0031060000;with a holder adapted for supporting apparatus to which its counterpart is attached H01R0033920000)
H01R0031060000	Intermediate parts for linking two coupling parts, e.g. adapter (with a holder adapted for supporting apparatus to which its counter-part is attached H01R0033940000);;
H01R0031080000	Short-circuiting members for bridging contacts in a counterpart (insulating members for separating contacts in a counterpart H01H0027040000);;
H01R0033000000	Coupling devices in which a holder is adapted for supporting apparatus to which its counterpart is attached; Separate parts thereof (structural association of counterpart with specific apparatus, see the relevant subclass for the apparatus);;
H01R0033020000	Single-pole devices, e.g. holder for supporting one end of a tubular incandescent or neon lamp
H01R0033050000	Two-pole devices
H01R0033060000	with two current-carrying pins, blades, or analogous contacts, having their axes parallel to each other
H01R0033080000	for supporting tubular fluorescent lamp
H01R0033090000	for baseless lamp bulb
H01R0033180000	having only abutting contacts
H01R0033200000	having concentrically or coaxially arranged contacts
H01R0033220000	for screw type base, e.g. for lamp
H01R0033460000	for bayonet type base
H01R0033720000	Three-pole devices
H01R0033740000	Devices having four or more poles
H01R0033760000	Holders with sockets, clips or analogous contacts, adapted for axially-sliding engagement with parallely-arranged pins, blades, or analogous contacts on counterpart, e.g. electronic tube socket
H01R0033880000	adapted for simultaneous co-operation with two or more identical counterparts
H01R0033900000	adapted for co-operation with two or more dissimilar counterparts
H01R0033920000	Holders formed as intermediate parts for distributing energy in parallel through two or more counterparts at least one of which is attached to apparatus to be held
H01R0033940000	Holders formed as intermediate parts for linking a counter-part to a coupling part
H01R0033945000	Holders with built-in electrical component
H01R0033950000	with fuse; with thermal switch
H01R0033955000	with switch operated manually and independent of engagement or disengagement of coupling
H01R0033960000	with switch operated by engagement or disengagement of coupling
H01R0033965000	Dustproof, splashproof, drip-proof, waterproof, or flameproof holders
H01R0033970000	Holders with separate means to prevent loosening of the coupling or unauthorised removal of apparatus held
H01R0033975000	Holders with resilient means for protecting apparatus against vibrations or shocks
H01R0035000000	Flexible or turnable line connectors (rotary current collectors, distributors H01R0039000000);;
H01R0035020000	Flexible line connectors
H01R0035040000	Turnable line connectors with limited rotation angle
H01R0039000000	Rotary current collectors, distributors, or interrupters (cam-operated switches H01H0019000000;structural association with dynamo-electric machine H02K)
H01R0039020000	Details
H01R0039040000	Commutators (wherein the segments are formed by extensions of dynamo-electric machine winding H02K);;
H01R0039060000	other than with external cylindrical contact surface, e.g. flat commutators
H01R0039080000	Slip-rings
H01R0039100000	other than with external cylindrical contact surface, e.g. flat slip-rings
H01R0039120000	using bearing or shaft surface as contact surface
H01R0039140000	Fastenings of commutators or slip-rings to shafts
H01R0039160000	by means of moulded or cast material applied during or after assembly
H01R0039180000	Contacts for co-operation with commutator or slip-ring, e.g. contact brush
H01R0039200000	characterised by the material thereof
H01R0039220000	incorporating lubricating or polishing ingredient
H01R0039240000	Laminated contacts; Wire contacts, e.g. metallic brush, carbon fibers
H01R0039260000	Solid sliding contacts, e.g. carbon brush
H01R0039270000	End caps on carbon brushes to transmit spring pressure
H01R0039280000	Roller contacts; Ball contacts
H01R0039300000	Liquid contacts
H01R0039320000	Connections of conductor to commutator segment
H01R0039340000	Connections of conductor to slip-ring
H01R0039360000	Connections of cable or wire to brush
H01R0039380000	Brush holders
H01R0039390000	wherein the brush is fixedly mounted in the holder
H01R0039400000	enabling brush movement within holder during current collection
H01R0039410000	cartridge type
H01R0039415000	with self-recoiling spring
H01R0039420000	Devices for lifting brushes
H01R0039440000	Devices for shifting brushes
H01R0039460000	Auxiliary means for improving current transfer, or for reducing or preventing sparking or arcing
H01R0039480000	by air blast; by surrounding collector with non-conducting liquid or gas
H01R0039500000	Barriers placed between brushes
H01R0039520000	by use of magnets
H01R0039540000	by use of impedance between brushes or segments
H01R0039560000	Devices for lubricating or polishing slip-rings or commutators during operation of the collector
H01R0039580000	Means structurally associated with the current collector for indicating condition thereof, e.g. for indicating brush wear
H01R0039590000	Means structurally associated with the brushes for interrupting current (H01R0039580000 takes precedence);;
H01R0039600000	Devices for interrupted current collection, e.g. commutating device, distributor, interrupter (self-interrupters H01H, e.g. H01H0051340000);;
H01R0039620000	with more than one brush co-operating with the same set of segments
H01R0039640000	Devices for uninterrupted current collection
H01R0041000000	Non-rotary current collectors for maintaining contact between moving and stationary parts of an electric circuit (end pieces terminating in a hook or the like H01R0011120000;current collectors for power supply lines of electrically-propelled vehicles B60L0005000000)
H01R0041020000	Devices for interrupted current collection, e.g. distributor (electrically-operated selector switches H01H0067000000);;
H01R0043000000	Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors (tools  for engangement  or disengangement of contact members  secured in non-demountable manner to a base or case of two-part or multipart coupling devices H01;R;13/438;of  trolley lines B60M0001280000; joining cables H02G0001140000)
H01R0043010000	for connecting unstripped conductors to contact members having insulation cutting edges
H01R0043020000	for soldered or welded connections (soldering or welding in general B23K);;
H01R0043027000	for connecting conductors by clips
H01R0043033000	for wrapping or unwrapping wire connections
H01R0043040000	for forming connections by deformation, e.g. crimping tool
H01R0043042000	Hand tools for crimping
H01R0043045000	with contact member feeding mechanism
H01R0043048000	Crimping apparatus or processes (H01R0043042000 takes precedence);;
H01R0043050000	with wire-insulation stripping
H01R0043052000	with wire-feeding mechanism
H01R0043055000	with contact member feeding mechanism
H01R0043058000	Crimping mandrels
H01R0043060000	Manufacture of commutators
H01R0043080000	in which segments are not separated until after assembly
H01R0043100000	Manufacture of slip-rings
H01R0043120000	Manufacture of brushes
H01R0043140000	Maintenance of current collectors, e.g. reshaping of brushes, cleaning of commutators
H01R0043160000	for manufacturing contact members, e.g. by punching and by bending
H01R0043180000	for manufacturing bases or cases for contact members
H01R0043200000	for assembling or disassembling contact members with insulating base, case or sleeve
H01R0043220000	Hand tools
H01R0043240000	Assembling by moulding on contact members
H01R0043260000	for engaging or disengaging the two parts of a coupling device (structural association with two-part coupling device H01R0013629000);;
H01R0043280000	for wire processing before connecting to contact members (H01R0043020000-H01R0043260000;  take precedence);;
H01S	DEVICES USING STIMULATED EMISSION
H01S0001000000	Masers, i.e. devices for generation, amplification, modulation, demodulation, or frequency-changing, using stimulated emission, of electromagnetic waves of wavelength longer than that of infra-red waves
H01S0001020000	solid
H01S0001040000	liquid
H01S0001060000	gaseous
H01S0003000000	Lasers, i.e. devices for generation, amplification, modulation, demodulation, or frequency-changing, using stimulated emission, of infra-red, visible, or ultra-violet waves
H01S0003020000	Constructional details
H01S0003030000	of gas laser discharge tubes
H01S0003040000	Cooling arrangements
H01S0003045000	Cooling the active medium
H01S0003050000	Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
H01S0003060000	Construction or shape of active medium
H01S0003070000	consisting of a plurality of parts, e.g. segments, optical fibres
H01S0003080000	Construction or shape of optical resonators or components thereof
H01S0003081000	comprising more than two reflectors
H01S0003082000	defining a plurality of resonators, e.g. for mode selection
H01S0003083000	Ring lasers (laser gyrometers G01C0019640000);;
H01S0003086000	One or more reflectors having variable properties or positions for initial adjustment of the resonator (varying a parameter of the laser output during operation H01S0003100000;stabilisation of the laser output H01S0003130000)
H01S0003090000	Processes or apparatus for excitation, e.g. pumping
H01S0003091000	using optical pumping
H01S0003092000	by flash lamp
H01S0003093000	focusing or directing the excitation energy into the active medium
H01S0003094000	by laser
H01S0003095000	using chemical or thermal pumping
H01S0003096000	by applying a potential to the electrodes of a semiconductor laser
H01S0003097000	by gas discharge of a gas laser
H01S0003098000	Mode locking; Mode suppression (mode suppression using a plurality of resonators H01S0003082000);;
H01S0003100000	Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating (mode locking H01S0003098000;controlling of light beams, frequency-changing, non-linear optics, optical logic elements, in general G02F)
H01S0003101000	Lasers provided with means to change the location from which, or the direction in which, laser radiation is emitted (optical scanning systems in general G02B0026100000;devices or arrangements for the electro-, magneto-, or acousto-optical deflection G02F0001290000)
H01S0003102000	by controlling the active medium, e.g. by controlling the processes or apparatus for excitation (H01S0003130000 takes precedence);;
H01S0003103000	in semiconductor lasers
H01S0003104000	in gas lasers
H01S0003105000	by controlling the mutual position or the reflecting properties of the reflectors of the cavity (H01S0003130000 takes precedence);;
H01S0003105500	one of the reflectors being constituted by a diffraction grating
H01S0003106000	by controlling a device placed within the cavity (H01S0003130000 takes precedence);;
H01S0003107000	using an electro-optical device, e.g. exhibiting Pockels- or Kerr-effect
H01S0003108000	using a non-linear optical device, e.g. exhibiting Brillouin- or Raman-scattering
H01S0003109000	Frequency multiplying, e.g. harmonic generation
H01S0003110000	in which the quality factor of the optical resonator is rapidly changed, i.e. giant-pulse technique
H01S0003113000	using bleachable or solarising media
H01S0003115000	using an electro-optical device
H01S0003117000	using an acousto-optical device
H01S0003121000	using a mechanical device
H01S0003123000	Rotating mirror
H01S0003125000	Rotating prism
H01S0003127000	Plural Q-switches
H01S0003130000	Stabilisation of laser output parameters, e.g. frequency, amplitude
H01S0003131000	by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
H01S0003133000	in semiconductor lasers
H01S0003134000	in gas lasers
H01S0003136000	by controlling a device placed within the cavity
H01S0003137000	for stabilising of frequency
H01S0003139000	by controlling the mutual position or the reflecting properties of the reflectors of the cavity
H01S0003140000	characterised by the material used as the active medium
H01S0003160000	solid materials
H01S0003170000	amorphous, e.g. glass
H01S0003180000	semi-conducting material
H01S0003190000	with PN junction
H01S0003200000	liquids
H01S0003220000	gases
H01S0003223000	polyatomic
H01S0003230000	Arrangements of two or more lasers not provided for in groups ; H01S0003020000-H01S0003220000, e.g. tandem arrangements of separate active media
H01S0003300000	using scattering effects, e.g. stimulated Brillouin or Raman effects
H01S0004000000	Devices using stimulated emission of wave energy other than those covered by groups ; H01S0001000000;  or H01S0003000000, e.g. phonon maser, gamma maser
H01T	SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES (working of metal by the action of a high concentration of electric current B23H;welding, e.g. arc welding, electron beam welding or electrolytic welding, B23K; gas-filled discharge tubes with solid cathode H01J0017000000; electric arc lamps H05B0031000000)
H01T0001000000	Details of spark gaps
H01T0001020000	Means for extinguishing arc
H01T0001040000	using magnetic blow-out
H01T0001060000	with permanent magnet
H01T0001080000	using flow of arc-extinguishing fluid
H01T0001100000	with extinguishing fluid evolved from solid material by heat of arc
H01T0001120000	Means structurally associated with spark gap for recording operation thereof
H01T0001140000	Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure (H01T0001150000, H01T0001160000, H01T0001180000 take precedence);;
H01T0001150000	for protection against excessive pressure
H01T0001160000	Series resistor structurally associated with spark gap
H01T0001180000	Electrolytic device structurally associated with spark gap
H01T0001200000	Means for starting arc or facilitating ignition of spark gap
H01T0001220000	by the shape or the composition of the electrodes
H01T0001240000	Selection of materials for electrodes (H01T0001220000 takes precedence);;
H01T0002000000	Spark gaps comprising auxiliary triggering means (triggering circuits H01T0015000000);;
H01T0002020000	comprising a trigger electrode or an auxiliary spark gap
H01T0004000000	Overvoltage arresters using spark gaps (H01T0002000000 takes precedence;overvoltage protection circuits using spark gaps H02H0009060000)
H01T0004020000	Details (of spark gaps H01T0001000000);;
H01T0004040000	Housings (H01T0004060000 takes precedence);;
H01T0004060000	Mounting arrangements for a plurality of overvoltage arresters
H01T0004080000	structurally associated with protected apparatus (with switches H01H0009140000;with fuses H01H0085440000)
H01T0004100000	having a single gap or a plurality of gaps in parallel (sparking-plugs H01T0013000000);;
H01T0004120000	hermetically sealed
H01T0004140000	Arcing horns (associated with insulators H01B0017460000);;
H01T0004160000	having a plurality of gaps arranged in series
H01T0004180000	Arrangements for reducing height of stacked spark gaps
H01T0004200000	Arrangements for improving potential distribution
H01T0007000000	Rotary spark gaps, i.e. devices having one or more rotating electrodes
H01T0009000000	Spark gaps specially adapted for generating oscillations
H01T0011000000	Spark gaps specially adapted as rectifiers
H01T0013000000	Sparking-plugs (testing sparking-plugs G01M0019020000);;
H01T0013020000	Details
H01T0013040000	Means providing electrical connection to sparking plug (electric connections in general H01R);;
H01T0013050000	combined with interference suppressing or shielding means
H01T0013060000	Covers forming a part of the plug and protecting it against adverse environment
H01T0013080000	Mounting, fixing, or sealing of sparking plugs, e.g. in combustion chamber
H01T0013100000	by bayonet-type connection
H01T0013120000	Means on sparking plugs for facilitating engagement by tool or by hand
H01T0013140000	Means for self-cleaning
H01T0013160000	Means for dissipating heat
H01T0013180000	Means for heating, e.g. for drying
H01T0013200000	characterised by features of the electrodes or insulation
H01T0013220000	having two or more electrodes embedded in insulation (for two or more sparks H01T0013460000);;
H01T0013240000	having movable electrodes (H01T0013280000 takes precedence);;
H01T0013260000	for adjusting spark gap otherwise than by bending of electrode
H01T0013280000	having spherically shaped electrodes, e.g. ball-shaped
H01T0013300000	mounted so as to permit free movement
H01T0013320000	characterised by features of the earthed electrode
H01T0013340000	characterised by the mounting of electrodes in insulation, e.g. by embedding
H01T0013360000	characterised by the joint between insulation and body, e.g. using cement
H01T0013380000	Selection of materials for insulation (in general H01B0003000000);;
H01T0013390000	Selection of materials for electrodes
H01T0013400000	structurally combined with other devices (combined or associated with fuel injectors F02M0057060000;structurally combined with other parts of internal-combustion engines F02P0013000000)
H01T0013410000	with interference suppressing or shielding means
H01T0013420000	with magnetic spark generators
H01T0013440000	with transformers, e.g. for high-frequency ignition
H01T0013460000	having two or more spark gaps
H01T0013480000	having means for rendering sparks visible
H01T0013500000	having means for ionisation of gap (H01T0013520000 takes precedence);;
H01T0013520000	characterised by a discharge along a surface
H01T0013540000	having electrodes arranged in a partly-enclosed ignition chamber
H01T0013560000	characterised by having component parts which are easily assembled or disassembled
H01T0014000000	Spark gaps not provided for in groups  H01T0002000000-H01T0013000000; (devices providing for corona discharge H01T0019000000);;
H01T0015000000	Circuits specially adapted for spark gaps, e.g. ignition circuits (ignition circuits for internal-combustion engines F02P;electric spark ignition for combustion apparatus F23Q; protection circuits using spark gaps H02H0009060000)
H01T0019000000	Devices providing for corona discharge (for charging electrographic elements G03G0015020000);;
H01T0019020000	Corona rings
H01T0019040000	having pointed electrodes
H01T0021000000	Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs
H01T0021020000	of sparking plugs
H01T0021040000	Cleaning (abrasive blasting devices for cleaning sparking-plugs B24C0003340000);;
H01T0021060000	Adjustment of spark gaps (sparking-plugs having movable electrodes for adjusting the gap H01T0013260000);;
H01T0023000000	Apparatus for generating ions to be introduced into non-enclosed gases, e.g. into the atmosphere (discharge tubes with provision for emergence of ions from the vessel H01J0033000000;generating plasma H05H)
H02	GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
H02B	SWITCHBOARDS, SWITCHYARDS, OR SWITCHGEAR, FOR THE DISTRIBUTION OF ELECTRIC POWER (electro-technical elements or the individual mounting thereof, see the subclasses for such elements, e.g. transformers H01F, switches, fuses H01H, line connectors H01R;interlocking between switches or between switches and gates, doors, shutters, or like movable parts of switchboards, switchyards, or switchgear H01H; installation of lines, cables, or other conductors for distribution H02G)
H02B0001000000	Details of switchboards, switchyards, or switchgear
H02B0001020000	Boards; Panels; Desks; Racks; Frameworks
H02B0001040000	Mounting thereon of switches or of other devices in general, the switch or device having, or being without, casing
H02B0001060000	having associated enclosures, e.g. for preventing access to live parts (shutters or guards for contacts H02B0001140000);;
H02B0001080000	Casings; Boxes (casings adapted for a single switch H01H;enclosures for cables, lines or bus-bars H02G; distribution boxes, connection or junction boxes H02G0003080000; casings in general H05K0005000000)
H02B0001100000	Mounting of devices therein
H02B0001120000	Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
H02B0001140000	Shutters or guards for preventing access to contacts (shielding of isolating-contacts in withdrawable switchgear H02B0011040000);;
H02B0001160000	Earthing arrangements (earth plates, pins, or other contacts H01R0004660000);;
H02B0001180000	Disposition or arrangement of transformers supplying instruments or protecting devices; Disposition or arrangement of fuses
H02B0001200000	Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards (installations of bus-bars H02G0005000000);;
H02B0001220000	Layouts for duplicate bus-bar selection
H02B0001240000	Circuit arrangements for switchboards or switchyards (devices for displaying diagrams H02B0015000000;service supply H02J0011000000)
H02B0003000000	Apparatus specially adapted for the manufacture, assembly, or maintenance of switchboards or switchgear
H02B0005000000	Outdoor arrangements (enclosed arrangements H02B0013000000);;
H02B0005020000	mounted on pole, e.g. pole transformer substation
H02B0005040000	Transformer substations (mounted on pole H02B0005020000);;
H02B0007000000	Indoor arrangements (switchgear withdrawable for isolation H02B0011000000;enclosed arrangements H02B0013000000)
H02B0007020000	mounted on open framework
H02B0007040000	mounted on vertical panel (for domestic or analogous use H02B0009000000);;
H02B0007060000	Transformer substations
H02B0007080000	Underground substations
H02B0009000000	Arrangements on boards or panels for domestic or analogous use, e.g. with distribution fuses, with energy meters
H02B0011000000	Switchgear having carriage withdrawable for isolation
H02B0011020000	Details
H02B0011040000	Isolating-contacts, e.g. mounting, shielding (line connectors in general H01R);;
H02B0011060000	Means for duplicate bus-bar selection (layouts for duplicate bus-bar selection H02B0001220000);;
H02B0011080000	Oil-tank lowering means associated with withdrawal mechanism
H02B0011100000	Indicating electrical condition of gear; Arrangement of test sockets
H02B0011120000	with isolation by horizontal withdrawal
H02B0011140000	having an enclosure
H02B0011160000	wherein front of enclosure moves with carriage
H02B0011180000	with isolation by vertical withdrawal
H02B0011200000	having an enclosure
H02B0011220000	wherein front of enclosure moves with carriage upon horizontal withdrawal subsequent to isolation
H02B0013000000	Arrangements of switchgear in which switches are enclosed in, or structurally associated with, a casing or cubicle (switchgear withdrawable for isolation H02B0011000000);;
H02B0013020000	with metal enclosure
H02B0013040000	with separately-enclosed devices mounted adjacent to one another
H02B0013060000	the devices being interconnected by enclosed bus-bars
H02B0013080000	with stone, brick, or concrete enclosure
H02B0015000000	Supervisory desks or panels for centralised control or display (desks in general A47B);;
H02B0015020000	with mimic diagrams
H02B0015040000	consisting of building blocks
H02G	INSTALLATION OF ELECTRIC CABLES OR LINES (distribution points incorporating switches H02B;guiding or winding-up telephone cord H04M0001150000; cable ducts or mountings for telephone or telegraph exchange installations H04Q0001060000)
H02G0001000000	Methodes or apparatus specially adapted for installing, maintaining, repairing, or dismantling electric cables or lines
H02G0001020000	for overhead lines or cables
H02G0001040000	for mounting or stretching (wire stretchers in general B25B0025000000);;
H02G0001060000	for laying cables, e.g. laying apparatus on vehicle (combined with trench digging or back-filling machines or dredgers E02F0005000000);;
H02G0001080000	through tubing or conduit, e.g. rod or draw wire for pushing or pulling
H02G0001100000	in or under water
H02G0001120000	for removing insulation or armouring from cables, e.g. from the end thereof (pliers in general B25B;cutters in general B26B)
H02G0001140000	for joining or terminating cables (joining electric conductors H01R0043000000);;
H02G0001160000	for repairing insulation or armouring of cables
H02G0001180000	for winding cables or lines, e.g. cable drum, reel (for use between relatively movable parts H02G0011000000;winding per se B65H)
H02G0003000000	Installations of electric cables or lines in or on buildings, equivalent structures or vehicles (installations of bus-bars H02G0005000000;overhead installations H02G0007000000; installations in or on the ground H02G0009000000; channels or vertical ducts for receiving utility lines E04F0017080000; wiring of electric apparatus in general H05K)
H02G0003020000	Details
H02G0003030000	Cooling
H02G0003040000	Protective tubings or conduits (pipes or tubings in general F16L);;
H02G0003060000	Joints for connecting lengths of protective tubing to each other or to casings, e.g. to distribution box; Ensuring electrical continuity in the joint
H02G0003080000	Distribution boxes; Connection or junction boxes (cable terminations H02G0015020000;containing switch devices H02B)
H02G0003100000	for surface mounting on a wall
H02G0003120000	for flush mounting
H02G0003140000	Fastening of cover or lid to box
H02G0003160000	structurally associated with support for line-connecting terminals within the box (terminals H01R0009000000);;
H02G0003180000	providing line outlets
H02G0003200000	Ceiling roses
H02G0003220000	Arrangements for leading cables or lines through walls, floors, or ceilings, e.g. into buildings (tubing through walls in general F16L0005000000;lead-in or lead-through insulators H01B0017260000; insulating tubes or sleeves H01B0017580000)
H02G0003240000	Installations of lines or cables on walls, ceilings or floors by means of insulators (insulators H01B0017000000);;
H02G0003260000	Installations of cables, lines, or separate protective tubing therefor directly on or in walls, ceilings, or floors, e.g. by cleats, by clips (by means of insulators H02G0003240000;supports or holders for cables or protective tubing F16L)
H02G0003280000	Installations of cables, lines, or separate protective tubing therefor in conduits or ducts pre-established in walls, ceilings, or floors
H02G0005000000	Installations of bus-bars
H02G0005020000	Open installations
H02G0005040000	Partially-enclosed installations, e.g. in ducts and adapted for sliding or rolling current collection (non-rotary current collectors H01R0041000000);;
H02G0005060000	Totally-enclosed installations, e.g. in metal casings
H02G0005080000	Connection boxes therefor
H02G0005100000	Cooling
H02G0007000000	Overhead installations of electric lines or cables (installations of bus-bars H02G0005000000;trolley wires or contact lines for electric railways B60M; fastening conductors to insulators H01B0017000000, e.g. H01B0017060000, H01B0017160000, H01B0017220000; protection against abnormal electric conditions H01H; hook contacts for temporary connections to overhead lines H01R0011140000)
H02G0007020000	Devices for adjusting or maintaining mechanical tension, e.g. take-up device
H02G0007040000	Arrangements or devices for relieving mechanical tension
H02G0007050000	Suspension arrangements or devices for electric cables or lines
H02G0007060000	Suspensions for lines or cables along a separate supporting wire, e.g. S-hook
H02G0007080000	Members clamped to the supporting wire or to the line or cable
H02G0007100000	Flexible members or lashings wrapped around both the supporting wire and the line or cable
H02G0007120000	Devices for maintaining distance between parallel conductors, e.g. spacer
H02G0007140000	Arrangements or devices for damping mechanical oscillations of lines, e.g. for reducing production of sound
H02G0007160000	Devices for removing snow or ice from lines or cables (from insulators H01B0017520000);;
H02G0007180000	Devices affording mechanical protection in the event of breakage of a line or cable, e.g. net for catching broken lines
H02G0007200000	Spatial arrangements or dispositions of lines or cables on poles, posts, or towers (construction of poles, posts, or towers E04H0012220000);;
H02G0007220000	Arrangements of earthing wires suspended between mastheads
H02G0009000000	Installations of electric cables or lines in or on the ground or water (cathodic protection C23F0013000000;detection of buried cables G01V)
H02G0009020000	laid directly in or on the ground, river-bed or sea-bottom; Coverings therefor, e.g. tile
H02G0009040000	in surface ducts; Ducts or covers therefor
H02G0009060000	in underground tubes or conduits; Tubes or conduits therefor
H02G0009080000	in tunnels
H02G0009100000	in cable chambers, e.g. in manhole, in handhole (building aspects of cable chambers section E, e.g. E04H0005060000);;
H02G0009120000	supported on or from floats, e.g. in water (floating cables H01B0007120000);;
H02G0011000000	Arrangements of electric cables or lines between relatively-movable parts (current collectors H01R);;
H02G0011020000	using take-up reel or drum
H02G0011040000	using gravity-loaded or spring-loaded loop
H02G0011060000	using extensible carrier for the cable, e.g. self-coiling spring (extensible conductors or cables H01B0007060000);;
H02G0013000000	Installations of lightning conductors; Fastening thereof to supporting structure (indicating, counting or recording lightning strokes G01;lightning arrestors H01C0007120000, H01C0008040000, H01G0009180000, H01T; earth plates, pins or other contacts H01R)
H02G0015000000	Cable fittings
H02G0015007000	Devices for relieving mechanical stress
H02G0015013000	Sealing means for cable inlets (inlets for cables filled with, or surrounded by, gas or oil H02G0015320000);;
H02G0015020000	Cable terminations (for gas- or oil-filled cables H02G0015220000);;
H02G0015040000	Cable-end sealings
H02G0015060000	Cable terminating boxes, frames, or other structures (terminal blocks H01R0009000000);;
H02G0015064000	with devices for relieving electrical stress
H02G0015068000	connected to the cable shield only (H02G0015072000 takes precedence);;
H02G0015072000	of the condenser type
H02G0015076000	for multi-conductor cables
H02G0015080000	Cable junctions (for gas or oil filled cables H02G0015240000;disconnectible junctions, electrical connections H01R)
H02G0015100000	protected by boxes, e.g. by distribution, connection or junction boxes (terminal blocks H01R0009000000);;
H02G0015103000	with devices for relieving electrical stress
H02G0015105000	connected to the cable shield only (H02G0015107000 takes precedence);;
H02G0015107000	of the condenser type
H02G0015113000	Boxes split longitudinally in main cable direction
H02G0015115000	Boxes split perpendicularly to main cable direction
H02G0015117000	for multiconductor cables
H02G0015120000	for incorporating transformers, loading coils or amplifiers
H02G0015140000	specially adapted for submarine cables
H02G0015160000	structurally associated with support for line-connecting terminals within the box
H02G0015180000	protected by sleeves, e.g. for communication cable (two-part covers H02G0015100000);;
H02G0015184000	with devices for relieving electrical stress
H02G0015188000	connected to cable shield only
H02G0015192000	with support means for ends of the sleeves
H02G0015196000	having lapped insulation
H02G0015200000	Cable fittings for cables filled with or surrounded by gas or oil (H02G0015340000 takes precedence);;
H02G0015220000	Cable terminations
H02G0015230000	Cable-end sealings
H02G0015240000	Cable junctions
H02G0015250000	Stop junctions
H02G0015260000	Expansion vessels; Locking heads; Auxiliary pipe-lines
H02G0015280000	structurally associated with devices for indicating the presence or location of non-electric faults (combined with electric protective means H02H);;
H02G0015300000	with devices for relieving electrical stress
H02G0015320000	Cable inlets
H02G0015340000	Cable fittings for cryogenic cables
H02H	EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS (indicating or signalling undesired working conditions G01R, e.g. G01R0031000000, G08B;locating faults along lines G01R0031080000; emergency protective devices H01H)
H02H0001000000	Details of emergency protective circuit arrangements
H02H0001040000	Arrangements for preventing response to transient abnormal conditions, e.g. to lightning
H02H0001060000	Arrangements for supplying operative power
H02H0003000000	Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection (specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems H02H0007000000;systems for change-over to standby supply H02J0009000000)
H02H0003020000	Details
H02H0003027000	with automatic disconnection after a predetermined time (H02H0003033000, H02H0003060000 take precedence);;
H02H0003033000	with several disconnections in a preferential order (H02H0003060000 takes precedence);;
H02H0003040000	with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
H02H0003050000	with means for increasing reliability, e.g. redundancy arrangements
H02H0003060000	with automatic reconnection
H02H0003070000	and with permanent disconnection after a predetermined number of reconnection cycles
H02H0003080000	responsive to excess current (responsive to abnormal temperature caused by excess current H02H0005040000);;
H02H0003087000	for dc applications
H02H0003093000	with timing means
H02H0003100000	additionally responsive to some other abnormal electrical conditions
H02H0003120000	responsive to underload or no-load
H02H0003130000	for multiphase applications, e.g. phase interruption
H02H0003140000	responsive to occurrence of voltage on parts normally at earth potential
H02H0003160000	responsive to fault current to earth, frame or mass (with balanced or differential arrangement H02H0003260000);;
H02H0003170000	by means of an auxiliary voltage injected into the installation to be protected
H02H0003180000	responsive to reversal of direct current
H02H0003200000	responsive to excess voltage
H02H0003220000	of short duration, e.g. lightning
H02H0003240000	responsive to undervoltage or no-voltage
H02H0003247000	having timing means
H02H0003253000	for multiphase applications, e.g. phase interruption
H02H0003260000	responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
H02H0003280000	involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus
H02H0003300000	using pilot wires or other signalling channel
H02H0003320000	involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
H02H0003330000	using summation current transformers (H02H0003347000 takes precedence);;
H02H0003340000	of a three-phase system
H02H0003347000	using summation current transformers
H02H0003353000	involving comparison of phase voltages
H02H0003360000	involving comparison of the voltage or current values at corresponding points of different systems, e.g. of parallel feeder systems
H02H0003380000	responsive to both voltage and current; responsive to phase angle between voltage and current
H02H0003400000	responsive to ratio of voltage and current
H02H0003420000	responsive to product of voltage and current
H02H0003440000	responsive to the rate of change of electrical quantities
H02H0003460000	responsive to frequency deviations
H02H0003480000	responsive to loss of synchronism
H02H0003500000	responsive to the appearance of abnormal wave forme, e.g. ac in dc installations
H02H0003520000	responsive to the appearance of harmonics
H02H0005000000	Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection (using simulators of the apparatus being protected H02H0006000000;specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems H02H0007000000)
H02H0005040000	responsive to abnormal temperature
H02H0005060000	in oil-filled electric apparatus
H02H0005080000	responsive to abnormal fluid pressure, liquid level or liquid displacement, e.g. Buchholz relays
H02H0005100000	responsive to mechanical injury, e.g. rupture of line, breakage of earth connection
H02H0005120000	responsive to undesired approach to, or touching of, live parts by living beings
H02H0006000000	Emergency protective circuit arrangements responsive to undesired changes from normal non-electric working conditions using simulators of the apparatus being protected, e.g. using thermal images
H02H0007000000	Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions (structural association of protective devices with specific machines or apparatus and their protection without automatic disconnection, see the relevant subclass for the machine or apparatus);;
H02H0007040000	for transformers
H02H0007045000	Differential protection of transformers
H02H0007050000	for capacitive voltage transformers, e.g. against resonant conditions
H02H0007055000	for tapped transformers or tap-changing means thereof
H02H0007060000	for dynamo-electric generators; for synchronous capacitors
H02H0007080000	for dynamo-electric motors
H02H0007085000	against excessive load
H02H0007090000	against over-voltage; against reduction of voltage; against phase interruption
H02H0007093000	against increase beyond, or decrease below, a predetermined level of rotational speed (centrifugal switches H01H0035100000);;
H02H0007097000	against wrong direction of rotation
H02H0007100000	for converters; for rectifiers
H02H0007120000	for static converters or rectifiers
H02H0007122000	for inverters, i.e. dc/ac converters
H02H0007125000	for rectifiers
H02H0007127000	having auxiliary control electrode to which blocking control voltages or currents are applied in case of emergency
H02H0007160000	for capacitors (for synchronous capacitors H02H0007060000);;
H02H0007180000	for batteries; for accumulators
H02H0007200000	for electronic equipment (for converters H02H0007100000;for electric measuring instruments G01R0001360000; for dc voltage or current semiconductor regulators G05F0001569000; for amplifiers H03F0001520000; for electronic switching circuits H03K0017080000)
H02H0007220000	for distribution gear, e.g. bus-bar systems; for switching devices
H02H0007240000	for spark-gap arresters
H02H0007260000	Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occurred (locating faults in cables G01R0031080000);;
H02H0007280000	for meshed systems
H02H0007300000	Staggered disconnection
H02H0009000000	Emergency protective circuit arrangements for limiting excess current or voltage without disconnection (structural association of protective devices with specific machines or apparatus, see the relevant subclass for the machine or apparatus);;
H02H0009020000	responsive te excess current
H02H0009040000	responsive to excess voltage (lightning arrestors H01C0007120000, H01C0008040000, H01G0009180000, H01T);;
H02H0009060000	using spark-gap arresters
H02H0009080000	Limitation or suppression of earth fault currents, e.g. Petersen coil
H02H0011000000	Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
H02J	CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY (circuits or apparatus for the conversion of electric power, arrangements for control or regulation of such circuits or apparatus H02M;interrelated control of several motors, control of a prime-mover /generator combination H02P; control of high-frequency power H03L; additional use of power line or power network for transmission of information H04B)
H02J0001000000	Circuit arrangements for dc mains or dc distribution networks
H02J0001020000	Arrangements for reducing harmonics or ripples (in converters H02M0001000000);;
H02J0001040000	Constant-current supply systems
H02J0001060000	Two-wire systems
H02J0001080000	Three-wire systems; Systems having more than three wires
H02J0001100000	Parallel operation of dc sources (involving batteries H02J0007340000);;
H02J0001120000	Parallel operation of dc generators with converters, e.g. with mercury-arc rectifier
H02J0001140000	Balancing the load in a network (by batteries H02J0007340000);;
H02J0001160000	using dynamo-electric machines coupled to flywheels
H02J0003000000	Circuit arrangements for ac mains or ac distribution networks
H02J0003010000	Arrangements for reducing harmonics or ripples (in converters H02M0001000000);;
H02J0003020000	using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
H02J0003040000	for connecting networks of the same frequency but supplied from different sources
H02J0003060000	Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
H02J0003080000	Synchronising of networks
H02J0003100000	Constant-current supply systems
H02J0003120000	for adjusting voltage in ac networks by changing a characteristic of the network load
H02J0003140000	by switching loads on to, or off from, network, e.g. progressively balanced loading
H02J0003160000	by adjustment of reactive power
H02J0003180000	Arrangements for adjusting, eliminating, or compensating reactive power in networks (for adjustment of voltage H02J0003120000;use of Petersen coils H02H0009080000)
H02J0003200000	in long overhead lines
H02J0003220000	in cables
H02J0003240000	Arrangements for preventing or reducing oscillations of power in networks (by control effected upon a single generator H02P0009000000);;
H02J0003260000	Arrangements for eliminating or reducing asymmetry in polyphase networks
H02J0003280000	Arrangements for balancing the load in a network by storage of energy
H02J0003300000	using dynamo-electric machines coupled to flywheels
H02J0003320000	using batteries with converting means
H02J0003340000	Arrangements for transfer of electric power between networks of substantially different frequency (frequency converters H02M);;
H02J0003360000	Arrangements for transfer of electric power between ac networks via a high-tension dc link
H02J0003380000	Arrangements for parallelly feeding a single network by two or more generators, converters, or transformers
H02J0003400000	Synchronising a generator for connection to a network or to another generator
H02J0003420000	with automatic parallel connection when synchronism is achieved
H02J0003440000	with means for ensuring correct phase sequence
H02J0003460000	Controlling the sharing of output between the generators, converters, or transformers
H02J0003480000	Controlling the sharing of the in-phase component
H02J0003500000	Controlling the sharing of the out-of-phase component
H02J0004000000	Circuit arrangements for mains or distribution networks not specified as ac or dc
H02J0005000000	Circuit arrangements for transfer of electric power between ac networks and dc networks (H02J0003360000 takes precedence);;
H02J0007000000	Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H02J0007020000	for charging batteries from ac mains by converters
H02J0007040000	Regulation of the charging current or voltage
H02J0007060000	using discharge tubes or semiconductor devices
H02J0007080000	using discharge tubes only
H02J0007100000	using semiconductor devices only
H02J0007120000	using magnetic devices having controllable degree of saturation, i.e. transductors
H02J0007140000	for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
H02J0007160000	Regulation of the charging current or voltage by variation of field
H02J0007180000	due to variation of ohmic resistance in field circuit, using resistance switching in or out of circuit step by step
H02J0007200000	due to variation of continuously-variable ohmic resistor
H02J0007220000	due to variation of make-to-break ratio of intermittently-operating contacts, e.g. using Tirrill regulator
H02J0007240000	using discharge tubes or semiconductor devices
H02J0007260000	using magnetic devices with controllable degree of saturation
H02J0007280000	using magnetic devices with controllable degree of saturation in combination with controlled discharge tube or controlled semiconductor device
H02J0007300000	using armature-reaction-excited machines
H02J0007320000	for charging batteries from a charging set comprising a non-electric prime mover
H02J0007340000	Parallel operation in networks using both storage and other dc sources, e.g. providing buffering (H02J0007140000 takes precedence);;
H02J0007350000	with light sensitive cells
H02J0007360000	Arrangements using end-cell switching
H02J0009000000	Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting (with provision for charging standby battery H02J0007000000);;
H02J0009020000	in which an auxiliary distribution system and its associated lamps are brought into service
H02J0009040000	in which the distribution system is disconnected from the normal source and connected to a standby source
H02J0009060000	with automatic change-over
H02J0009080000	requiring starting of a prime-mover
H02J0011000000	Circuit arrangements for providing service supply to auxiliaries of stations in which electric power is generated, distributed, or converted (emergency or standby arrangements H02J0009000000);;
H02J0013000000	Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
H02J0015000000	Systems for storing electric energy (mechanical systems therefor F01-F04; in chemical form H01M)
H02J0017000000	Systems for supplying or distributing electric power by electromagnetic waves
H02K	DYNAMO-ELECTRIC MACHINES (measuring instruments G01;dynamo-electric relays H01H0053000000; conversion of dc or ac input power into surge output power H02M0009000000; microphones, pick-ups, telephone receivers, loud-speakers or other transmitters or receivers of sound or other mechanical waves H04R)
H02K0001000000	Details of the magnetic circuit (magnetic circuits or magnets in general, magnetic circuits for transformers for power supply H01F;magnetic circuits for relays H01H0050160000)
H02K0001020000	characterised by the magnetic material
H02K0001040000	characterised by the material used for insulating the magnetic circuit or parts thereof (insulation of windings H02K0003300000);;
H02K0001060000	characterised by the shape, form, or construction
H02K0001080000	Salient poles
H02K0001100000	Commutating poles
H02K0001120000	Stationary parts of the magnetic circuit
H02K0001140000	Stator cores with salient poles
H02K0001160000	Stator cores with slots for windings
H02K0001180000	Means for mounting or fastening magnetic stationary part on to, or to, the stator structure
H02K0001200000	with channels or ducts for flow of cooling medium
H02K0001220000	Rotating parts of magnetic circuit
H02K0001240000	Rotor cores with salient poles
H02K0001260000	Rotor cores with slots for windings
H02K0001280000	Means for mounting or fastening rotating magnetic part on to, or to, the rotor structure
H02K0001300000	using intermediate part or parts, e.g. spider
H02K0001320000	with channels or ducts for flow of cooling medium
H02K0001340000	Reciprocating, oscillating, or vibrating part of magnetic circuit
H02K0003000000	Details of windings (coils in general H01F0005000000);;
H02K0003020000	Windings characterised by the conductor material (conductors in general H01B0001000000, H01B0005000000);;
H02K0003040000	Windings characterised by the conductor shape, form, or construction, e.g. with bar conductor
H02K0003120000	arranged in slots
H02K0003140000	with transposed conductors, e.g. twisted conductor
H02K0003160000	for damping, commutating, or other auxiliary purposes
H02K0003180000	Windings for salient poles
H02K0003200000	for damping, commutating, or other auxiliary purposes
H02K0003220000	consisting of hollow conductors
H02K0003240000	with channels or ducts between the conductors for flow of cooling medium
H02K0003260000	consisting of printed conductors
H02K0003280000	Layout of windings or of connections between windings (windings for pole-changing H02K0017060000, H02K0017140000, H02K0019120000, H02K0019320000);;
H02K0003300000	Windings characterised by the insulating material (insulating bodies in general H01B0003000000, H01B0017000000);;
H02K0003320000	Windings characterised by the shape, form, or construction of the insulation
H02K0003340000	between conductors or between conductor and core, e.g. slot insulation
H02K0003380000	around winding heads, equalising connectors, or connections thereto
H02K0003400000	for high voltage, e.g. affording protection against corona
H02K0003420000	Means for preventing or reducing eddy-current losses in the winding heads, e.g. by shielding
H02K0003440000	Protection against moisture or chemical attack; Windings specially adapted for operation in liquid or gas
H02K0003460000	Fastening of windings on stator or rotor structure
H02K0003470000	Air-gap windings, i.e. iron-free windings
H02K0003480000	in slots
H02K0003487000	Slot-closing devices
H02K0003493000	where the devices are magnetic
H02K0003500000	Fastening of winding heads, equalising connectors, or connections thereto
H02K0003510000	applicable to rotors only
H02K0003520000	Fastening salient pole windings or connections thereto
H02K0005000000	Casings; Enclosures; Supports (casings for electric apparatus in general H05K0005000000);;
H02K0005020000	Casings or enclosures characterised by the material thereof
H02K0005040000	Casings or enclosures characterised by the shape, form, or construction thereof
H02K0005060000	Cast metal casings
H02K0005080000	Insulating casings
H02K0005100000	affording protection from ingress, e.g. of water, of fingers
H02K0005120000	specially adapted for operating in liquid or gas (combined with cooling arrangements H02K0009000000);;
H02K0005124000	Sealing of the shaft
H02K0005128000	using air-gap sleeve or air-gap disc
H02K0005132000	Submersible electric motor (H02K0005128000 takes precedence;pumping installations or systems for submerged use F04D0013080000)
H02K0005136000	explosion-proof
H02K0005140000	Means for supporting or protecting brushes or brush holders
H02K0005150000	Mounting arrangements for bearing-shields or end plates
H02K0005160000	Means for supporting bearings, e.g. insulating support, means for fitting the bearing in the bearing-shield (magnetic bearings H02K0007090000);;
H02K0005167000	using sliding-contact or spherical cap bearings
H02K0005173000	using ball bearings or bearings with rolling contact
H02K0005180000	with ribs or fins for improving heat transfer
H02K0005200000	with channels or ducts for flow of cooling medium
H02K0005220000	Other additional parts of casings, e.g. shaped to form connection or terminal box
H02K0005240000	specially adapted for suppression or reduction of noise or vibration
H02K0005260000	Means for adjusting the casing relative to its support
H02K0007000000	Arrangements for handling mechanical energy structurally associated with the machine
H02K0007020000	Additional mass for increasing inertia, e.g. flywheel
H02K0007040000	Balancing means
H02K0007060000	Means for converting reciprocating into rotary motion or ; vice versa
H02K0007065000	Electromechanical oscillators; Vibrating magnetic drives (in time-pieces G04C0005000000);;
H02K0007070000	using pawl and ratchet wheel
H02K0007075000	using crankshaft or eccentric
H02K0007080000	Structural association with bearings (support in machine casing H02K0005160000);;
H02K0007090000	with magnetic bearings
H02K0007100000	Structural association with clutches, brakes, gears, pulleys, mechanical starters
H02K0007102000	with friction brakes
H02K0007104000	with eddy-current brakes
H02K0007106000	with dynamo-electric brakes
H02K0007108000	with friction clutches
H02K0007110000	with dynamo-electric clutches
H02K0007112000	with friction clutches and brakes
H02K0007114000	with dynamo-electric clutches and brakes
H02K0007116000	with gear-box
H02K0007118000	with starting device
H02K0007120000	with auxiliary limited movement of stator, rotor, or core parts, e.g. rotor axially movable for the purpose of clutching or braking
H02K0007140000	Structural association with mechanical load, e.g. hand-held machine tool, fan (with fan or impeller for cooling the machine H02K0009060000;for suction cleaners A47L)
H02K0007160000	for operation above critical speed of vibration of rotating parts
H02K0007180000	Structural association of electric generator with mechanical driving motor, e.g. turbine (if the driving-motor aspect predominates, see the relevant place of section F, e.g. F03B0013000000);;
H02K0007200000	Structural association with auxiliary dynamo-electric machine, e.g. with electric starter motor, with exciter
H02K0009000000	Systems for cooling or ventilating (channels or ducts in parts of the magnetic circuit H02K0001200000, H02K0001320000;channels or ducts in or between conductors H02K0003220000, H02K0003240000)
H02K0009020000	by ambient air flowing through the machine
H02K0009040000	having means for generating flow of cooling medium, e.g. having fan
H02K0009060000	with fan or impeller driven by the machine shaft
H02K0009080000	by gaseous cooling medium circulating wholly within the machine casing (H02K0009100000 takes precedence);;
H02K0009100000	by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
H02K0009120000	wherein the cooling medium circulates freely within the casing
H02K0009140000	wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle
H02K0009160000	wherein the cooling medium circulates through ducts or tubes within the casing
H02K0009180000	wherein the external part of the closed circuit comprises a heat exchanger structurally associated with the machine casing
H02K0009190000	for machines with closed casing and with closed-circuit cooling using a liquid cooling medium, e.g. oil
H02K0009193000	with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium
H02K0009197000	in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator
H02K0009200000	wherein the cooling medium vaporises within the machine casing
H02K0009220000	by solid heat conducting material embedded in, or arranged in contact with, stator or rotor, e.g. heat bridge
H02K0009240000	Protection against failure of cooling arrangements, e.g. due to loss of cooling medium, due to interruption of the circulation of cooling medium (circuit arrangements affording such protection H02H0007000000);;
H02K0009260000	Structural association with machine of devices for cleaning or drying cooling medium, e.g. of filter
H02K0009280000	Cooling of commutators, slip-rings, or brushes, e.g. by ventilating (current collectors in general H01R0039000000);;
H02K0011000000	Structural association with measuring or protective devices or electric components, e.g. with resistor, with switch, with suppressor for radio interference
H02K0013000000	Arrangements for current collection structurally associated with the machine (means for supporting brushes or brush holders in casings H02K0005140000;current collectors or details thereof in general H01R0039000000); Circuit arrangements for improvement of commutation
H02K0013020000	Connections of slip-rings with the winding
H02K0013040000	Connections of commutator segments with the winding
H02K0013060000	Resistive connections between winding and commutator segments, e.g. by high-resistance choke, by transistor
H02K0013080000	Segments formed by extensions of winding
H02K0013100000	Special arrangements of brushes or commutators for the purpose of improving commutation
H02K0013120000	Means for producing an axial reciprocation of the rotor and its associated current collector part, e.g. for polishing commutator surface
H02K0013140000	Circuit arrangements for improvement of commutation, e.g. by use of unidirectionally conductive element
H02K0015000000	Methods or apparatus specially adapted for manufacturing, assembling, maintaining, or repairing dynamo-electric machines (manufacture of current collectors in general H01R0043000000);;
H02K0015020000	of stator or rotor bodies
H02K0015040000	of windings, prior to mounting into the machine (insulating windings H02K0015100000, H02K0015120000;coil manufacture in general H01F0041020000)
H02K0015060000	Embedding prefabricated windings in the machine
H02K0015080000	Forming windings by laying conductors into or around core part
H02K0015085000	by laying conductors into slotted stators
H02K0015090000	by laying conductors into slotted rotors
H02K0015095000	by laying conductors around salient poles
H02K0015100000	Applying solid insulation to the windings, the stator, or the rotor
H02K0015120000	Impregnating, heating or drying of windings, stators, rotors, or machines
H02K0015140000	Casings; Enclosures; Supports
H02K0015160000	Centering the rotor within the stator; Balancing the rotor (balancing per se G01M);;
H02K0016000000	Machines with more than one rotor or stator
H02K0016020000	Machines with one stator and two rotors
H02K0016040000	Machines with one rotor and two stators
H02K0017000000	Asynchronous induction motors; Asynchronous induction generators
H02K0017020000	Asynchronous induction motors
H02K0017040000	for single phase current
H02K0017060000	having windings arranged for permitting pole-changing
H02K0017080000	Motors with auxiliary phase obtained by externally fed auxiliary winding, e.g. capacitor motor
H02K0017100000	Motors with auxiliary phase obtained by split-pole carrying short-circuited winding
H02K0017120000	for multi-phase current
H02K0017140000	having windings arranged for permitting pole-changing
H02K0017160000	having rotor with internally short-circuited windings, e.g. cage rotor
H02K0017180000	having double- or multiple-cage rotor
H02K0017200000	having deep-bar rotor
H02K0017220000	having rotor with windings connected to slip-rings
H02K0017240000	in which both stator and rotor are fed with ac
H02K0017260000	having rotor or stator designed to permit synchronous operation
H02K0017280000	having compensating winding for improving phase angle
H02K0017300000	Structural association with auxiliary electric devices influencing the characteristic of, or controlling, the motor, e.g. with impedance, with switch (control arrangements external to the motor H02P);;
H02K0017320000	Structural association with auxiliary mechanical devices, e.g. clutch, brake (control arrangements external to the motor H02P);;
H02K0017340000	Cascade arrangement of an asynchronous motor with another dynamo-electric motor or converter (control of cascade arrangements H02P);;
H02K0017360000	with another asynchronous induction motor
H02K0017380000	with a commutator machine
H02K0017400000	with a rotary ac/dc converter (cascade ac/dc converters H02K0047060000);;
H02K0017420000	Asynchronous induction generators (H02K0017020000 takes precedence);;
H02K0017440000	Structural association with exciting machine
H02K0019000000	Synchronous motors or generators (having permanent magnet H02K0021000000);;
H02K0019020000	Synchronous motors
H02K0019040000	for single-phase current
H02K0019060000	Motors having windings on the stator and a variable-reluctance soft-iron rotor without windings, e.g. inductor motor
H02K0019080000	Motors having windings on the stator and a smooth rotor of material with large hysteresis without windings, e.g. hysteresis motor
H02K0019100000	for multi-phase current
H02K0019120000	characterised by the arrangement of exciting windings, e.g. for self-excitation, for compounding, for pole-changing
H02K0019140000	having additional short-circuited winding for starting as an asynchronous motor
H02K0019160000	Synchronous generators
H02K0019180000	having windings each turn of which co-operates only with poles of one polarity, e.g. homopolar generator
H02K0019200000	with variable-reluctance soft-iron rotor without winding
H02K0019220000	having windings each turn of which co-operates alternately with poles of opposite polarity, e.g. heteropolar generator
H02K0019240000	with variable-reluctance soft-iron rotor without winding
H02K0019260000	characterised by the arrangement of exciting winding
H02K0019280000	for self-excitation
H02K0019300000	for compounding
H02K0019320000	for pole-changing
H02K0019340000	Generators with two or more outputs
H02K0019360000	Structural association with auxiliary electric devices influencing the characteristic of, or controlling, the generator, e.g. with impedance, with switch (control arrangements external to the generator H02P);;
H02K0019380000	Structural association with exciting machine
H02K0021000000	Synchronous motors having permanent magnet; Synchronous generators having permanent magnet
H02K0021020000	Details
H02K0021040000	Windings on magnet for additional excitation
H02K0021060000	Magnets
H02K0021080000	Rotating magnets
H02K0021100000	Rotating armatures
H02K0021120000	with stationary armature and rotating magnet
H02K0021140000	magnet rotating within armature
H02K0021160000	having an annular armature core with salient poles (with homopolar co-operation H02K0021200000);;
H02K0021180000	having horse-shoe armature core (with homopolar co-operation H02K0021200000);;
H02K0021200000	having windings each turn of which co-operates only with poles of one polarity, e.g. homopolar machine
H02K0021220000	magnet rotating around armature, e.g. flywheel magneto
H02K0021240000	magnet axially facing armature, e.g. hub-type cycle dynamo
H02K0021260000	with rotating armature and stationary magnet
H02K0021280000	armature rotating within magnet
H02K0021300000	having an annular armature core with salient poles (with homopolar co-operation H02K0021360000);;
H02K0021320000	having a horse-shoe magnet (with homopolar co-operation H02K0021360000);;
H02K0021340000	having bell-shaped or bar-shaped magnet, e.g. for cycle lighting (with homopolar co-operation H02K0021360000);;
H02K0021360000	with homopolar co-operation
H02K0021380000	with rotating flux distributor, and armature and magnet both stationary
H02K0021400000	flux distributor rotating around magnet and within armature
H02K0021420000	flux distributor rotating around armature and within magnet
H02K0021440000	armature windings wound upon magnet
H02K0021460000	Motors having additional short-circuited winding for starting as an asynchronous motor
H02K0021480000	Generators with two or more outputs
H02K0023000000	Dc commutator motors or generators having mechanical commutator; Universal ac/dc commutator motors
H02K0023020000	characterised by the exciting arrangement
H02K0023040000	having permanent magnet excitation
H02K0023060000	having shunt connection of excitation windings
H02K0023080000	having series connection of excitation windings
H02K0023100000	having compound connection of excitation windings
H02K0023120000	having excitation produced by a current source independent of the armature circuit
H02K0023140000	having high-speed excitation or de-excitation, e.g. by neutralising the remanent excitation field
H02K0023160000	having angularly adjustable excitation field, e.g. by pole reversing, by pole switching
H02K0023180000	having displaceable main or auxiliary brushes
H02K0023200000	having additional brushes spaced intermediately of the main brushes on the commutator, e.g. cross-field machine, metadyne, amplidyne, other armature-reaction excited machine
H02K0023220000	having compensating or damping winding
H02K0023240000	having commutating-pole winding
H02K0023260000	characterised by the armature winding
H02K0023280000	having open winding, i.e. not closed within armature
H02K0023300000	having lap winding; having loop winding
H02K0023320000	having wave winding; having undulating winding
H02K0023340000	having mixed windings
H02K0023360000	having more than one winding; having more than one commutator; having more than one stator
H02K0023380000	having winding or connection for improving commutation, e.g. equipotential connection
H02K0023400000	characterised by the arrangement of the magnet circuit
H02K0023420000	having split poles, i.e. zones for varying reluctance by gaps in poles or by poles with different spacing of the air gap
H02K0023440000	having movable or turnable iron parts
H02K0023460000	having stationary shunts, i.e. magnetic cross flux
H02K0023480000	having adjustable armature
H02K0023500000	Generators with two or more outputs
H02K0023520000	Motors acting also as generators, e.g. starting motor used as generator for ignition or lighting
H02K0023540000	Disc armature motors or generators
H02K0023560000	Motors or generators having the iron core separated from armature winding
H02K0023580000	Motors or generators having no iron core
H02K0023600000	Motors or generators having a rotating armature and a rotating excitation field
H02K0023620000	Motors or generators with stationary armature and rotating excitation field
H02K0023640000	Motors specially adapted for running on dc or ac by choice
H02K0023660000	Structural association with auxiliary electric devices influencing the characteristic of, or controlling, the machine, e.g. with impedance, with switch (control arrangements external to the machine H02P);;
H02K0023680000	Structural association with auxiliary mechanical devices, e.g. with clutch, with brake (control arrangements external to the machine H02P);;
H02K0024000000	Machines adapted for the instantaneous transmission or reception of the angular displacement of rotating parts, e.g. synchro, selsyn
H02K0025000000	Dc interrupter motors or generators
H02K0026000000	Machines adapted to function as torque motors, i.e. to exert a torque when stalled
H02K0027000000	Ac commutator motors or generators having mechanical commutator (universal ac/dc motors H02K0023640000);;
H02K0027020000	characterised by the armature winding
H02K0027040000	having single-phase operation in series or shunt connection
H02K0027060000	with a single or multiple short-circuited commutator, e.g. repulsion motor
H02K0027080000	with multiple-fed armature
H02K0027100000	with switching devices for different modes of operation, e.g. repulsion-induction motor
H02K0027120000	having multi-phase operation
H02K0027140000	in series connection
H02K0027160000	in shunt connection with stator feeding
H02K0027180000	in shunt connection with rotor feeding
H02K0027200000	Structural association with a speed regulating device
H02K0027220000	having means for improving commutation, e.g. auxiliary fields, double windings, double brushes
H02K0027240000	having two or more commutators
H02K0027260000	having disc armature
H02K0027280000	Structural association with auxiliary electric devices influencing the characteristic of, or controlling, the machine (control arrangements external to the machine H02P);;
H02K0027300000	Structural association with auxiliary mechanical devices, e.g. clutch, brake (control arrangements external to the machine H02P);;
H02K0029000000	Motors or generators having non-mechanical commutating devices, e.g. discharge tubes, semiconductor devices
H02K0029060000	with position sensing devices
H02K0029080000	using magnetic effect devices, e.g. Hall-plates, magneto-resistors (H02K0029120000 takes precedence);;
H02K0029100000	using light effect devices
H02K0029120000	using detecting coils
H02K0029140000	with speed sensing devices
H02K0031000000	Acyclic motors or generators, i.e. dc machines having a drum or disc armature with continuous current collectors
H02K0031020000	with solid-contact collectors
H02K0031040000	with at least one liquid-contact collector
H02K0033000000	Motors with reciprocating, oscillating, or vibrating magnet, armature, or coil system (arrangements for handling mechanical energy structurally associated with motors H02K0007000000, e.g. H02K0007060000);;
H02K0033020000	with armature moved one way by energisation of a single coil system and returned by mechanical force, e.g. by spring
H02K0033040000	wherein the frequency of operation is determined by the frequency of uninterrupted ac energisation
H02K0033060000	with polarised armature
H02K0033080000	with dc energisation superimposed on ac energisation
H02K0033100000	wherein the alternate energisation and de-energisation of the single coil system is effected or controlled by movement of the armature
H02K0033120000	with armature moving in alternate directions by alternate energisation of two coil systems
H02K0033140000	wherein the alternate energisation and de-energisation of the two coil systems are effected or controlled by movement of the armature
H02K0033160000	with polarised armature moving in alternate directions by reversal or energisation of a single coil system
H02K0033180000	with coil system moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnet
H02K0035000000	Generators with reciprocating, oscillating, or vibrating coil system, magnet, armature, or other part of the magnetic circuit (arrangements for handling mechanical energy structurally associated with generators H02K0007000000, e.g. H02K0007060000);;
H02K0035020000	with moving magnet and stationary coil system
H02K0035040000	with moving coil system and stationary magnet
H02K0035060000	with moving flux distributor, and both coil system and magnet stationary
H02K0037000000	Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
H02K0037020000	variable reluctance type
H02K0037040000	Rotor situated within stator
H02K0037060000	Rotor situated around stator
H02K0037080000	Rotor axially facing stator
H02K0037100000	permanent magnet type (H02K0037020000 takes precedence);;
H02K0037120000	with stationary armature and rotating magnet
H02K0037140000	Magnet rotating within armature
H02K0037160000	having horse-shoe armature core
H02K0037180000	homopolar type
H02K0037200000	with rotating flux distributor, the armature and magnet both being stationary
H02K0037220000	Damping units
H02K0037240000	Structural association with auxiliary mechanical devices
H02K0039000000	Generators specially adapted for producing a desired non-sinusoidal waveform
H02K0041000000	Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
H02K0041020000	Linear motors; Sectional motors
H02K0041025000	Asynchronous motors
H02K0041030000	Synchronous motors; Motors moving step by step; Reluctance motors (H02K0041035000 takes precedence);;
H02K0041035000	Dc motors; Unipolar motors
H02K0041060000	Rolling motors, i.e. having the rotor axis parallel to the stator axis and following a circular path as the rotor rolls around the inside or outside of the stator
H02K0044000000	Machines in which the dynamo-electric interaction between a plasma or flow of conductive liquid or of fluid-borne conductive or magnetic particles and a coil system or magnetic field converts energy of mass flow into electrical energy or ; vice versa
H02K0044020000	Electrodynamic pumps
H02K0044040000	Conduction pumps
H02K0044060000	Induction pumps
H02K0044080000	Magnetohydrodynamic (MHD) generators
H02K0044100000	Constructional details of electrodes
H02K0044120000	Constructional details of fluid channel
H02K0044140000	Circular or screw-shaped channel
H02K0044160000	Constructional details of the magnetic circuit
H02K0044180000	for generating ac power
H02K0044200000	by changing the polarity of the magnetic field
H02K0044220000	by changing the conductivity of the fluid
H02K0044240000	by reversing the direction of fluid
H02K0044260000	by creating a travelling magnetic field
H02K0044280000	Association of MHD generators with conventional generators (nuclear power plants including a MHD generator G21D0007020000);;
H02K0047000000	Dynamo-electric converters
H02K0047020000	Ac/dc converters or ; vice versa
H02K0047040000	Motor/generators
H02K0047060000	Cascade converters
H02K0047080000	Single-armature converters
H02K0047100000	with booster machine on the ac side
H02K0047120000	Dc/dc converters
H02K0047140000	Motor/generators
H02K0047160000	Single-armature converters, e.g. metadyne
H02K0047180000	Ac/ac converters
H02K0047200000	Motor/generators
H02K0047220000	Single-armature frequency converters with or without phase-number conversion
H02K0047240000	having windings for different numbers of poles
H02K0047260000	operating as under- or over-synchronously running asynchronous induction machines, e.g. cascade arrangement of asynchronous and synchronous machines
H02K0047280000	operating as commutator machines with added slip-rings
H02K0047300000	Single-armature phase-number converters without frequency conversion
H02K0049000000	Dynamo-electric clutches; Dynamo-electric brakes (electrically or magnetically actuated clutches or brakes F16D0027000000, F16D0029000000, F16D0065340000, F16D0065360000;magnetic-particle clutches F16D0037020000; adapted for use as dynamometers G01L)
H02K0049020000	of the asynchronous induction type
H02K0049040000	of the eddy-current hysteresis type
H02K0049060000	of the synchronous type
H02K0049080000	of the collector armature type
H02K0049100000	of the permanent-magnet type
H02K0049120000	of the acyclic type
H02K0051000000	Dynamo-electric gears, i.e. dynamo-electric means for transmitting mechanical power from a driving shaft to a driven shaft and comprising structurally interrelated motor and generator parts
H02K0053000000	Alleged dynamo-electric ; perpetua mobilia
H02K0055000000	Dynamo-electric machines having windings operating at cryogenic temperatures
H02K0055020000	of the synchronous type
H02K0055040000	with rotating field windings
H02K0055060000	of the homopolar type
H02K0057000000	Dynamo-electric machines not provided for in groups ; H02K0017000000-H02K0055000000
H02M	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (systems for regulating electric or magnetic variables in general, e.g. using transformers, reactors or choke coils, combination of such systems with static converters G05F;transformers H01F; connection or control of one converter with regard to conjoint operation with a similar or other source of supply H02J; dynamo-electric converters H02K0047000000; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P; pulse generators H03K)
H02M0001000000	Details of apparatus for conversion
H02M0001020000	Circuits specially adapted for the generation of grid-control or igniter-control voltages for discharge tubes incorporated in static converters
H02M0001040000	for tubes with grid control
H02M0001060000	Circuits specially adapted for rendering non-conductive gas discharge tubes or equivalent semiconductor devices, e.g. thyratrons, thyristors
H02M0001080000	Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
H02M0001084000	using a control circuit common to several phases of a multi-phase system
H02M0001088000	for the simultaneous control of series or parallel connected semiconductor devices
H02M0001092000	the control signals being transmitted optically
H02M0001096000	the power supply of the control circuit being connected in parallel to the main switching element (H02M0001092000 takes precedence);;
H02M0001100000	Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from ac or dc
H02M0001120000	Arrangements for reducing harmonics from ac input or output
H02M0001140000	Arrangements for reducing ripples from dc input or output
H02M0001150000	using active elements
H02M0001160000	Means for providing current step on switching, e.g. with saturable reactor
H02M0001200000	Contact mechanisms of dynamic converters
H02M0001220000	incorporating collectors and brushes
H02M0001240000	incorporating rolling or tumbling contacts
H02M0001260000	incorporating cam-operated contacts
H02M0001280000	incorporating electromagnetically-operated vibrating contacts
H02M0001300000	incorporating liquid contacts
H02M0003000000	Conversion of dc power input into dc power output
H02M0003020000	without intermediate conversion into ac
H02M0003040000	by static converters
H02M0003060000	using resistors or capacitors, e.g. potential divider
H02M0003070000	using capacitors charged and discharged alternately by semiconductor devices with control electrode
H02M0003080000	using discharge tubes without control electrode or semiconductor devices without control electrode
H02M0003100000	using discharge tubes with control electrode or semiconductor devices with control electrode (H02M0003070000 takes precedence);;
H02M0003125000	using devices of a thyratron or thyristor type requiring extinguishing means
H02M0003130000	using discharge tubes only
H02M0003135000	using semiconductor devices only
H02M0003137000	with automatic control of output voltage or current, e.g. switching regulators
H02M0003139000	with digital control
H02M0003142000	including plural semiconductor devices as final control devices for a single load
H02M0003145000	using devices of a triode or transistor type requiring continuous application of a control signal
H02M0003150000	using discharge tubes only
H02M0003155000	using semiconductor devices only
H02M0003156000	with automatic control of output voltage or current, e.g. switching regulators
H02M0003157000	with digital control
H02M0003158000	including plural semiconductor devices as final control devices for a single load
H02M0003160000	by dynamic converters
H02M0003180000	using capacitors or batteries which are alternately charged and discharged, e.g. charged in parallel and discharged in series
H02M0003200000	by combination of static with dynamic converters; by combination of dynamo-electric with other dynamic or static converters
H02M0003220000	with intermediate conversion into ac
H02M0003240000	by static converters
H02M0003260000	using discharge tubes without control electrode or semiconductor devices without control electrode to produce the intermediate ac
H02M0003280000	using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
H02M0003305000	using devices of a thyratron or thyristor type requiring extinguishing means
H02M0003310000	using discharge tubes only
H02M0003315000	using semiconductor devices only
H02M0003325000	using devices of a triode or a transistor type requiring continuous application of a control signal
H02M0003330000	using discharge tubes only
H02M0003335000	using semiconductor devices only
H02M0003337000	in push-pull configuration
H02M0003338000	in a self-oscillating arrangement (H02M0003337000 takes precedence);;
H02M0003340000	by dynamic converters
H02M0003360000	using mechanical parts to select progressively or to vary continuously the input potential
H02M0003380000	using mechanical contact-making and -breaking parts to interrupt a single potential
H02M0003400000	wherein the parts are rotating and collectors co-operate with brushes or rollers
H02M0003420000	with el ctromagnetically-operated vibrating contacts, e.g. chopper (self-interrupters in general H01H0051340000);;
H02M0003440000	by combination of static with dynamic converters; by combination of dynamo-electric with other dynamic or static converters
H02M0005000000	Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
H02M0005020000	without intermediate conversion into dc
H02M0005040000	by static converters (controlling transformers, reactors or choke coils, e.g. by tap changing, H02P0013000000);;
H02M0005060000	using impedances
H02M0005080000	using capacitors only
H02M0005100000	using transformers
H02M0005120000	for conversion of voltage or current amplitude only
H02M0005140000	for conversion between circuits of different phase number
H02M0005160000	for conversion of frequency
H02M0005180000	for conversion of waveform
H02M0005200000	using discharge tubes without control electrode or semiconductor devices without control electrode
H02M0005220000	using discharge tubes with control electrode or semiconductor devices with control electrode
H02M0005250000	using devices of a thyratron or thyristor type requiring extinguishing means (H02M0005270000 takes precedence);;
H02M0005253000	using discharge tubes only
H02M0005257000	using semiconductor devices only
H02M0005270000	for conversion of frequency
H02M0005275000	using devices of a triode or transistor type requiring continuous application of a control signal (H02M0005297000 takes precedence);;
H02M0005290000	using discharge tubes only
H02M0005293000	using semiconductor devices only
H02M0005297000	for conversion of frequency
H02M0005320000	by dynamic converters
H02M0005340000	using mechanical contact-making and -breaking parts
H02M0005360000	wherein the parts are rotating and collectors co-operate with brushes or rollers
H02M0005380000	by combination of static with dynamic converters; by combination of dynamo-electric with other dynamic or static converters
H02M0005400000	with intermediate conversion into dc
H02M0005420000	by static converters
H02M0005440000	using discharge tubes or semiconductor devices to convert the intermediate dc into ac
H02M0005443000	using devices of a thyratron or thyristor type requiring extinguishing means
H02M0005447000	using discharge tubes only
H02M0005450000	using semiconductor devices only
H02M0005451000	with automatic control of output voltage or frequency
H02M0005452000	with automatic control of output waveform
H02M0005453000	using devices of a triode or transistor type requiring continuous application of a control signal
H02M0005456000	using discharge tubes only
H02M0005458000	using semiconductor devices only
H02M0005460000	by dynamic converters
H02M0005480000	by combination of static with dynamic converters; by combination of dynamo-electric with other dynamic or static converters
H02M0007000000	Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
H02M0007020000	Conversion of ac power input into dc power output without possibility of reversal
H02M0007040000	by static converters
H02M0007060000	using discharge tubes without control electrode or semiconductor devices without control electrode
H02M0007080000	arranged for operation in parallel
H02M0007100000	arranged for operation in series, e.g. for multiplication of voltage
H02M0007120000	using discharge tubes with control electrode or semiconductor devices with control electrode
H02M0007145000	using devices of a thyratron or thyristor type requiring extinguishing means
H02M0007150000	using discharge tubes only
H02M0007155000	using semiconductor devices only
H02M0007162000	in a bridge configuration
H02M0007170000	arranged for operation in parallel
H02M0007190000	arranged for operation in series, e.g. for voltage multiplication
H02M0007210000	using devices of a triode or transistor type requiring continuous application of a control signal
H02M0007213000	using discharge tubes only
H02M0007217000	using semiconductor devices only
H02M0007219000	in a bridge configuration
H02M0007230000	arranged for operation in parallel
H02M0007250000	arranged for operation in series, e.g. for multiplication of voltage
H02M0007260000	using open-spark devices, e.g. Marx rectifier
H02M0007280000	using electrolytic rectifiers
H02M0007300000	by dynamic converters
H02M0007320000	using mechanical contact-making and -breaking parts
H02M0007340000	wherein the parts are rotating and collectors co-operate with brushes or rollers
H02M0007360000	with el ctromagnetically-operated vibrating contacts, e.g. chopper (self-interrupters in general H01H0051340000);;
H02M0007380000	using one or more sparking electrodes rotating over counterelectrodes
H02M0007400000	by combination of static with dynamic converters; by combination of dynamo-electric with other dynamic or static converters
H02M0007420000	Conversion of dc power input into ac power output without possibility of reversal
H02M0007440000	by static converters
H02M0007460000	using discharge tubes without control electrode or semiconductor devices without control electrode
H02M0007480000	using discharge tubes with control electrode or semiconductor devices with control electrode
H02M0007505000	using devices of a thyratron or thyristor type requiring extinguishing means
H02M0007510000	using discharge tubes only
H02M0007515000	using semiconductor devices only
H02M0007517000	with special starting equipment
H02M0007519000	in a push-pull configuration (H02M0007517000 takes precedence);;
H02M0007521000	in a bridge configuration
H02M0007523000	with LC-resonance circuit in the main circuit
H02M0007525000	with automatic control of output waveform or frequency (H02M0007517000-H02M0007523000;  take precedence);;
H02M0007527000	by pulse width modulation
H02M0007529000	using digital control
H02M0007530000	using devices of a triode or transistor type requiring continuous application of a control signal
H02M0007533000	using discharge tubes only
H02M0007537000	using semiconductor devices only
H02M0007537500	with special starting equipment
H02M0007538000	in a push-pull configuration (H02M0007537500 takes precedence);;
H02M0007538300	in a self-oscillating arrangement (H02M0007538000 takes precedence);;
H02M0007538700	in a bridge configuration
H02M0007539000	with automatic control of output wave form or frequency (H02M0007537500-H02M0007538700;  take precedence);;
H02M0007539500	by pulse-width modulation
H02M0007540000	by dynamic converters
H02M0007560000	using mechanical parts to select progressively, or to vary continuously, the input potential
H02M0007580000	using mechanical contact-making and -breaking parts to interrupt a single potential
H02M0007600000	wherein the parts are rotating and collectors co-operate with brushes or rollers
H02M0007620000	with el ctromagnetically-operated vibrating contacts, e.g. chopper (self-interrupters in general H01H0051340000);;
H02M0007640000	by combination of static with dynamic converters; by combination of dynamo-electric with other dynamic or static converters
H02M0007660000	with possibility of reversal
H02M0007680000	by static converters
H02M0007700000	using discharge tubes without control electrode or semiconductor devices without control electrode
H02M0007720000	using discharge tubes with control electrode or semiconductor devices with control electrode
H02M0007750000	using devices of a thyratron or thyristor type requiring extinguishing means (H02M0007770000 takes precedence);;
H02M0007753000	using discharge tubes only
H02M0007757000	using semiconductor devices only
H02M0007758000	with automatic control of output waveform or frequency
H02M0007770000	arranged for operation in parallel
H02M0007790000	using devices of a triode or transistor type requiring continuous application of a control signal (H02M0007810000 takes precedence);;
H02M0007793000	using discharge tubes only
H02M0007797000	using semiconductor devices only
H02M0007810000	arranged for operation in parallel
H02M0007820000	using open-spark devices, e.g. Marx rectifier
H02M0007840000	using electrolytic rectifiers
H02M0007860000	by dynamic converters
H02M0007880000	using mechanical parts to select progressively or to vary continuously the input potential
H02M0007900000	using mechanical contact-making and -breaking parts to interrupt a single potential
H02M0007920000	wherein the parts are rotating and collectors co-operate with brushes or rollers
H02M0007940000	wherein the parts are operated by rotating cams or cam-like devices
H02M0007950000	with el ctromagnetically-operated vibrating contacts, e.g. chopper (self-interrupters in general H01H0051340000);;
H02M0007960000	with moving liquid contacts
H02M0007980000	by combination of static with dynamic converters; by combination of dynamo-electric with other dynamic or static converters
H02M0009000000	Conversion of dc or ac input power into surge output power
H02M0009020000	with dc input power
H02M0009040000	using capacitative stores
H02M0009060000	with ac input power
H02M0011000000	Power conversion systems not covered by the preceding groups
H02N	ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
H02N0001000000	Electrostatic generators or motors using a solid moving electrostatic charge carrier
H02N0001040000	Friction generators
H02N0001060000	Influence generators
H02N0001080000	with conductive charge carrier, i.e. capacitor machines
H02N0001100000	with non-conductive charge carrier
H02N0001120000	in the form of a conveyer belt, e.g. van de Graaff machine
H02N0002000000	Motors or generators using piezo-electric effect, electrostriction or magnetostriction (apparatus for generating mechanical vibrations with piezo-electric effect, electrostriction or magnetostriction B06B0001060000, B06B0001080000;piezo-electric, electrostrictive or magnetostrictive devices per se H01L0041000000)
H02N0003000000	Generators in which thermal or kinetic energy is converted into electrical energy by ionisation of a fluid and removal of the charge therefrom (discharge tubes functioning as thermionic generators H01J0045000000);;
H02N0006000000	Generators in which light radiation is directly converted into electrical energy (solar cells or assemblies thereof, per se H01L0025000000, H01L0031000000);;
H02N0010000000	Electric motors using thermal effects
H02N0011000000	Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means (by hydrostatic pressure F03B0017040000;by dynamo-electric means H02K0053000000)
H02N0013000000	Clutches or holding devices using electrostatic attraction, e.g. using Johnson-Rahbek effect
H02N0015000000	Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for (electric or magnetic devices for holding work on machine tools B23Q0003150000;sliding or levitation devices for railway systems B61B0013080000; material handling devices associated with conveyers incorporating devices with electrostatic or magnetic grippers B65G0047920000; separating thin or filamentary articles from piles using magnetic force B65H0003160000; delivering thin or filamentary articles from magnetic holders by air blast or suction B65H0029240000; bearings using magnetic or electric supporting means F16C0032040000; relieving bearing loads using magnetic means F16C0039060000; magnets H01F0007000000; dynamo-electric clutches or brakes H02K0049000000)
H02N0015020000	by Foucault currents
H02N0015040000	Repulsion by the Meissner effect (superconductors or hyperconductors in general H01L0039000000);;
H02P	CONTROL OR REGULATION OF ELECTRIC MOTORS, GENERATORS, OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS (structure of the starter, brake, or other control devices, see the relevant subclasses, e.g. mechanical brake F16D, mechanical speed regulator G05D, variable resistor H01C, starter switch H01H;systems for regulating electric or magnetic variables using transformers, reactors or choke coils G05F; arrangements structurally associated with motors, generators, dynamo-electric converters, transformers, reactors or choke coils, see the relevant subclasses, e.g. H01F, H02K; connection or control of one generator, transformer, reactor, choke coil, or dynamo-electric converter with regard to conjoint operation with similar or other source of supply H02J; control or regulation of static converters H02M)
H02P0001000000	Arrangements for starting electric motors or dynamo-electric converters (H02P0006000000 takes precedence);;
H02P0001020000	Details
H02P0001040000	Means for controlling progress of starting sequence in dependence upon time or upon current, speed, or other motor parameter
H02P0001060000	Manually-operated multi-position starters
H02P0001080000	Manually-operated on/off switch controlling power-operated multi-position switch or impedances for starting a motor
H02P0001100000	Manually-operated on/off switch controlling relays or contactors operating sequentially for starting a motor (sequence determined by power-operated multi-position switch H02P0001080000);;
H02P0001120000	Switching devices centrifugally operated by the motor
H02P0001140000	Pressure-sensitive resistors centrifugally operated by the motor
H02P0001160000	for starting dynamo-electric motors or dynamo-electric converters
H02P0001180000	for starting an individual dc motor
H02P0001200000	by progressive reduction of resistance in series with armature winding
H02P0001220000	in either direction of rotation
H02P0001240000	for starting an individual ac commutator motor (starting of ac/dc commutator motors H02P0001180000);;
H02P0001260000	for starting an individual polyphase induction motor
H02P0001280000	by progressive increase of voltage applied to primary circuit of motor
H02P0001300000	by progressive increase of frequency of supply to primary circuit of motor
H02P0001320000	by star/delta switching
H02P0001340000	by progressive reduction of impedance in secondary circuit
H02P0001360000	the impedance being a liquid resistance
H02P0001380000	by pole-changing
H02P0001400000	in either direction of rotation
H02P0001420000	for starting an individual single-phase induction motor
H02P0001440000	by phase-splitting with a capacitor
H02P0001460000	for starting an individual synchronous motor
H02P0001480000	by pole-changing
H02P0001500000	by changing over from asynchronous to synchronous operation (H02P0001480000 takes precedence);;
H02P0001520000	by progressive increase of frequency of supply to motor
H02P0001540000	for starting two or more dynamo-electric motors
H02P0001560000	simultaneously
H02P0001580000	sequentially
H02P0003000000	Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters (H02P0006000000 takes precedence);;
H02P0003020000	Details
H02P0003040000	Means for stopping or slowing by a separate brake, e.g. friction brake, eddy-current brake (brakes F16D, H02K0049000000);;
H02P0003060000	for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
H02P0003080000	for stopping or slowing a dc motor
H02P0003100000	by reversal of supply connections
H02P0003120000	by short-circuit or resistive braking
H02P0003140000	by regenerative braking
H02P0003160000	by combined electrical and mechanical braking
H02P0003180000	for stopping or slowing an ac motor
H02P0003200000	by reversal of phase sequence of connections to the motor
H02P0003220000	by short-circuit or resistive braking
H02P0003240000	by applying dc to the motor
H02P0003260000	by combined electrical and mechanical braking
H02P0005000000	Arrangements for speed regulation of electric motors wherein the motor speed is measured and compared with a given physical value so as to adjust the motor speed
H02P0005040000	for speed regulation of an individual motor by means of a separate brake
H02P0005060000	for speed regulation of an individual dc dynamo-electric motor by varying field or armature current
H02P0005080000	using centrifugal devices, e.g. switch, resistor
H02P0005100000	using a periodic interrupter, e.g. Tirrill regulator (H02P0005080000, H02P0005120000-H02P0005180000;  take precedence);;
H02P0005120000	using discharge tubes or semiconductor devices (H02P0005080000 takes precedence);;
H02P0005140000	using discharge tubes
H02P0005160000	using semiconductor devices
H02P0005162000	controlling field supply only
H02P0005165000	controlling armature supply only
H02P0005168000	using variable impedance
H02P0005170000	using pulse modulation
H02P0005172000	using static converters, e.g. ac to dc
H02P0005175000	of the kind having one thyristor or the like in series with the power supply and the motor
H02P0005178000	controlling armature and field supply
H02P0005180000	using magnetic devices with controllable degree of saturation, i.e. transductors
H02P0005200000	using armature-reaction-excited machines, e.g. metadyne, amplidyne, rototrol
H02P0005220000	using Ward-Leonard set
H02P0005240000	in which only the generator field is controlled
H02P0005260000	in which both generator and motor fields are controlled
H02P0005280000	for speed regulation of an individual ac motor by varying stator or rotor current
H02P0005300000	using centrifugal devices, e.g. switch, resistor
H02P0005320000	using a periodic interrupter (H02P0005300000 takes precedence);;
H02P0005340000	by varying frequency of supply to rotor or stator
H02P0005360000	using discharge tubes or semiconductor devices
H02P0005380000	using discharge tubes
H02P0005400000	using semiconductor devices
H02P0005402000	controlling supply voltage (H02P0005418000 takes precedence);;
H02P0005405000	controlling secondary impedance
H02P0005408000	controlling supply frequency (H02P0005418000 takes precedence);;
H02P0005410000	using dc to ac converters
H02P0005412000	using ac to ac converters without intermediate conversion to dc
H02P0005415000	controlling slip energy
H02P0005418000	for regulating commutator motors
H02P0005420000	using magnetic devices with controllable degree of saturation, i.e. transductors
H02P0005440000	using brush shifting arrangements
H02P0005460000	for speed regulation of two or more dynamo-electric motors in relation to one another
H02P0005480000	by comparing mechanical values representing the speeds
H02P0005500000	by comparing electrical values representing the speeds
H02P0005520000	additionally providing control of relative angular displacement
H02P0006000000	Arrangements for controlling dynamo-electric motors with electronic commutators; Electronic commutators therefor (for stepping motors H02P0008000000);;
H02P0006020000	for dc motors
H02P0007000000	Arrangements for controlling the speed or torque of electric motors (H02P0001000000-H02P0006000000, H02P0008000000 take precedence;speed control in general G05D0013620000)
H02P0007040000	for controlling an individual motor by means of a separate brake
H02P0007060000	for controlling an individual dc dynamo-electric motor by varying field or armature current
H02P0007080000	by manual control without auxiliary power
H02P0007100000	of motor field only
H02P0007120000	Switching field from series to shunt excitation or ; vice versa
H02P0007140000	of voltage applied to the armature with or without control of field
H02P0007180000	by master control with auxiliary power
H02P0007200000	using multi-position switch, e.g. drum, controlling motor circuit by means of relays
H02P0007220000	using multi-position switch, e.g. drum, controlling motor circuit by means of pilot-motor-operated multi-position switch or pilot-motor-operated variable resistance
H02P0007240000	using discharge tubes or semiconductor devices
H02P0007260000	using discharge tubes
H02P0007280000	using semiconductor devices
H02P0007282000	controlling field supply only
H02P0007285000	controlling armature supply only
H02P0007288000	using variable impedance
H02P0007290000	using pulse modulation
H02P0007292000	using static converters, e.g. ac to dc
H02P0007295000	of the kind having one thyristor or the like in series with the power supply and the motor
H02P0007298000	controlling armature and field supply
H02P0007300000	using magnetic devices with controllable degree of saturation, i.e. transductors
H02P0007320000	using armature-reaction-excited machines, e.g. metadyne, amplidyne, rototrol
H02P0007340000	using Ward-Leonard arrangements
H02P0007360000	for controlling an individual ac dynamo-electric motor by varying stator or rotor current
H02P0007380000	by manual control without auxiliary power
H02P0007400000	using variable impedance in stator or rotor circuit
H02P0007420000	using variable-frequency supply
H02P0007440000	wherein only rotor or only stator circuit is supplied with ac
H02P0007460000	wherein both rotor and stator circuits are supplied with ac, the frequency of supply to one circuit being variable
H02P0007480000	by pole-changing
H02P0007500000	by shifting the brushes of a commutator motor
H02P0007520000	by master control with auxiliary power
H02P0007540000	using multi-position switch, e.g. drum, controlling motor circuit by means of relays
H02P0007560000	using multi-position switch, e.g. drum, controlling motor circuit by means of pilot-motor-operated multi-position switch or pilot-motor-operated variable resistance
H02P0007580000	using discharge tubes or semiconductor devices
H02P0007600000	using discharge tubes
H02P0007620000	using semiconductor devices
H02P0007622000	controlling supply voltage (H02P0007638000 takes precedence);;
H02P0007625000	controlling secondary impedance
H02P0007628000	controlling supply frequency (H02P0007638000 takes precedence);;
H02P0007630000	using dc to ac converters
H02P0007632000	using ac to ac converters without intermediate conversion to dc
H02P0007635000	controlling slip energy
H02P0007638000	for controlling commutator motors
H02P0007640000	using magnetic devices with controllable degree of saturation, i.e. transductors
H02P0007660000	using an ac generator to supply the motor, the motor being controlled by a control effected upon the generator
H02P0007670000	for controlling two or more dynamo-electric motors
H02P0007680000	for controlling two or more dc dynamo-electric motors
H02P0007685000	electrically connected in series, i.e. carrying the same current
H02P0007690000	mechanically coupled by gearing
H02P0007695000	Differential gearing
H02P0007740000	for controlling two or more ac dynamo-electric motors
H02P0007747000	mechanically coupled by gearing
H02P0007753000	Differential gearing
H02P0007800000	for controlling combinations of dc and ac dynamo-electric motors
H02P0008000000	Arrangements for controlling dynamo-electric motors of the kind having rotor rotating step by step and without interrupter or commutator driven by the rotor
H02P0009000000	Arrangements for controlling electric generators for the purpose of obtaining a desired output (Ward-Leonard arrangements H02P0007340000;feeding a network by two or more generators H02J; for charging batteries H02J0007140000)
H02P0009020000	Details
H02P0009040000	Control effected upon non-electric prime mover and dependent upon electric output value of the generator (effecting control of the prime mover in general, see the relevant class for such prime mover);;
H02P0009060000	Control effected upon clutch or other mechanical power transmission means and dependent upon electric output value of the generator (effecting control of the power transmission means, see the relevant class for such means);;
H02P0009080000	Control of generator circuit during starting or stopping of driving means, e.g. for initiating excitation
H02P0009100000	Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
H02P0009120000	for demagnetising; for reducing effects of remanence; for preventing pole reversal
H02P0009140000	by variation of field (H02P0009080000, H02P0009100000 take precedence);;
H02P0009160000	due to variation of ohmic resistance in field circuit, using resistances switched in or out of circuit step by step
H02P0009180000	the switching being caused by a servomotor, measuring instrument, or relay
H02P0009200000	due to variation of continuously-variable ohmic resistance
H02P0009220000	comprising carbon pile resistance
H02P0009240000	due to variation of make-to-break ratio of intermittently-operating contacts, e.g. using Tirrill regulator
H02P0009260000	using discharge tubes or semiconductor devices (H02P0009340000 takes precedence);;
H02P0009280000	using discharge tubes
H02P0009300000	using semiconductor devices
H02P0009320000	using magnetic devices with controllable degree of saturation (H02P0009340000 takes precedence);;
H02P0009340000	using magnetic devices with controllable degree of saturation in combination with controlled discharge tube or controlled semiconductor device
H02P0009360000	using armature-reaction-excited machines
H02P0009380000	Self-excitation by current derived from rectification of both output voltage and output current of generator
H02P0009400000	by variation of reluctance of magnetic circuit of generator
H02P0009420000	to obtain desired frequency without varying speed of the generator
H02P0009440000	Control of frequency and voltage in predetermined relation, e.g. constant ratio
H02P0009460000	Control of asynchronous generator by variation of capacitor
H02P0009480000	Arrangements for obtaining a constant output value at varying speed of the generator, e.g. on vehicle (H02P0009040000-H02P0009460000;  take precedence);;
H02P0011000000	Arrangements for controlling dynamo-electric converters (starting H02P0001000000;stopping or slowing H02P0003000000; feeding a network in conjunction with a generator or another converter H02J)
H02P0011040000	for controlling dynamo-electric converters having a dc output
H02P0011060000	for controlling dynamo-electric converters having an ac output
H02P0013000000	Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output (regulation systems using transformers, reactors or choke coils G05F;transformers H01F; feeding a network in conjunction with a generator or a converter H02J; control or regulation of converters H02M)
H02P0013060000	by tap-changing; by rearranging interconnections of windings
H02P0013080000	by sliding current collector along winding
H02P0013100000	by moving core, coil winding, or shield, e.g. by induction regulator
H02P0013120000	by varying magnetic bias
H02P0015000000	Arrangements for controlling dynamo-electric brakes or clutches (controlling speed of dynamo-electric motors by means of a separate brake H02P0005000000, H02P0007000000);;
H02P0015020000	Conjoint control of brakes and clutches
H02P0017000000	Arrangements for controlling dynamo-electric gears
H03	BASIC ELECTRONIC CIRCUITRY
H03B	GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS (measuring, testing G01R;generators adapted for electrophonic musical instruments G10H; speech synthesis G10L; masers, lasers H01S; dynamo-electric machines H02K; power inverter circuits H02M; by using pulse techniques H03K; automatic control of generators H03L; starting, synchronisation or stabilisation of generators where the type of generator is irrelevant or unspecified H03L; generation of oscillations in plasma H05H)
H03B0001000000	Details
H03B0001020000	Structural details of power oscillators, e.g. for heating
H03B0001040000	Reducing undesired oscillations, e.g. harmonics
H03B0005000000	Generation of oscillations using amplifier with regenerative feedback from output to input (H03B0009000000, H03B0015000000 take precedence);;
H03B0005020000	Details
H03B0005040000	Modifications of generator to compensate for variations in physical values, e.g. power supply, load, temperature
H03B0005060000	Modifications of generator to ensure starting of oscillations
H03B0005080000	with frequency-determining element comprising lumped inductance and capacitance
H03B0005100000	active element in amplifier being vacuum tube (H03B0005140000 takes precedence);;
H03B0005120000	active element in amplifier being semiconductor device (H03B0005140000 takes precedence);;
H03B0005140000	frequency-determining element connected via bridge circuit to closed ring around which signal is transmitted
H03B0005160000	active element in amplifier being vacuum tube
H03B0005180000	with frequency-determining element comprising distributed inductance and capacitance
H03B0005200000	with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator
H03B0005220000	active element in amplifier being vacuum tube (H03B0005260000 takes precedence);;
H03B0005240000	active element in amplifier being semiconductor device (H03B0005260000 takes precedence);;
H03B0005260000	frequency-determining element being part of bridge circuit in closed ring around which signal is transmitted; frequency-determining element being connected via a bridge circuit to such a closed ring, e.g. Wien-Bridge oscillator, parallel-T oscillator
H03B0005280000	active element in amplifier being vacuum tube
H03B0005300000	with frequency-determining element being electromechanical resonator
H03B0005320000	being a piezo-electric resonator (selection of piezo-electric material H01L0041000000);;
H03B0005340000	active element in amplifier being vacuum tube (H03B0005380000 takes precedence);;
H03B0005360000	active element in amplifier being semiconductor device (H03B0005380000 takes precedence);;
H03B0005380000	frequency-determining element being connected via bridge circuit to closed ring around which signal is transmitted
H03B0005400000	being a magnetostrictive resonator (H03B0005420000 takes precedence;selection of magnetostrictive material H01L0041000000)
H03B0005420000	frequency-determining element connected via bridge circuit to closed ring around which signal is transmitted
H03B0007000000	Generation of oscillations using active element having a negative resistance between two of its electrodes (H03B0009000000 takes precedence);;
H03B0007020000	with frequency-determining element comprising lumped inductance and capacitance
H03B0007040000	active element being vacuum tube
H03B0007060000	active element being semiconductor device
H03B0007080000	being a tunnel diode
H03B0007100000	active element being gas-discharge or arc-discharge tube
H03B0007120000	with frequency-determining element comprising distributed inductance and capacitance
H03B0007140000	active element being semiconductor device
H03B0009000000	Generation of oscillations using transit-time effects
H03B0009010000	using discharge tubes
H03B0009020000	using a retarding-field tube (using klystrons H03B0009040000);;
H03B0009040000	using a klystron
H03B0009060000	using a reflex klystron
H03B0009080000	using a travelling-wave tube
H03B0009100000	using a magnetron
H03B0009120000	using solid state devices, e.g. Gunn-effect devices
H03B0009140000	and elements comprising distributed inductance and capacitance
H03B0011000000	Generation of oscillations using a shock-excited tuned circuit (with feedback H03B0005000000);;
H03B0011020000	excited by spark (spark gaps therefor H01T0009000000);;
H03B0011040000	excited by interrupter
H03B0011060000	by mechanical interrupter
H03B0011080000	interrupter being discharge tube
H03B0011100000	interrupter being semiconductor device
H03B0013000000	Generation of oscillations using deflection of electron beam in a cathode-ray tube
H03B0015000000	Generation of oscillations using galvano-magnetic devices, e.g. Hall-effect devices, or using super-conductivity effects (galvano-magnetic devices per se H01L0043000000);;
H03B0017000000	Generation of oscillations using radiation source and detector, e.g. with interposed variable obturator
H03B0019000000	Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source (transference of modulation from one carrier to another H03D0007000000);;
H03B0019030000	using non-linear inductance
H03B0019050000	using non-linear capacitance, e.g. varactor diodes
H03B0019060000	by means of discharge device or semiconductor device with more than two electrodes
H03B0019080000	by means of a discharge device
H03B0019100000	using multiplication only
H03B0019120000	using division only
H03B0019140000	by means of a semiconductor device
H03B0019160000	using uncontrolled rectifying devices, e.g. rectifying diodes or Schottky diodes
H03B0019180000	and elements comprising distributed inductance and capacitance
H03B0019200000	being diodes exhibiting charge storage or enhancement effects
H03B0021000000	Generation of oscillations by combining unmodulated signals of different frequencies (H03B0019000000 takes precedence;frequency changing circuits in general H03D)
H03B0021010000	by beating unmodulated signals of different frequencies
H03B0021020000	by plural beating, i.e. for frequency synthesis
H03B0021040000	using several similar stages
H03B0023000000	Generation of oscillations periodically swept over a predetermined frequency range (angle-modulating circuits in general H03C0003000000);;
H03B0025000000	Simultaneous generation by a free-running oscillator of oscillations having different frequencies
H03B0027000000	Generation of oscillations providing a plurality of outputs of the same frequency but differing in phase, other than merely two anti-phase outputs
H03B0028000000	Generation of oscillations by methods not covered by groups  H03B0005000000-H03B0027000000, including modification of the waveform to produce sinusoidal oscillations(analogue function generators for performing computing operations G06G0007260000;use of transformers for conversion of waveform in acac converters H02M0005180000)
H03B0029000000	Generation of noise currents and voltages
H03C	MODULATION (measuring, testing G01R;masers, lasers H01S; modulators specially adapted for use in dc amplifiers H03F0003380000; modulating pulses H03K0007000000; so-called modulators capable only of switching between predetermined states of amplitude, frequency or phase H03K0017000000, H04L; coding, decoding or code conversion, in general H03M; synchronous modulators specially adapted for colour television H04N0009650000)
H03C0001000000	Amplitude modulation (H03C0005000000, H03C0007000000 take precedence);;
H03C0001020000	Details
H03C0001040000	Means in, or combined with, modulating stage for reducing angle modulation
H03C0001060000	Modifications of modulator to reduce distortion, e.g. by feedback, and clearly applicable to more than one type of modulator
H03C0001080000	by means of variable impedance element (H03C0001280000-H03C0001340000, H03C0001460000-H03C0001520000, H03C0001620000 take precedence);;
H03C0001100000	the element being a current-dependent inductor
H03C0001120000	the element being a voltage-dependent capacitor
H03C0001140000	the element being a diode
H03C0001160000	by means of discharge device having at least three electrodes (H03C0001280000-H03C0001340000, H03C0001500000, H03C0001520000, H03C0001620000 take precedence);;
H03C0001180000	carrier applied to control grid
H03C0001200000	modulating signal applied to anode
H03C0001220000	modulating signal applied to same grid
H03C0001240000	modulating signal applied to different grid
H03C0001260000	modulating signal applied to cathode
H03C0001280000	by means of transit-time tube
H03C0001300000	by means of a magnetron
H03C0001320000	by deflection of electron beam in discharge tube
H03C0001340000	by means of light-sensitive element
H03C0001360000	by means of semiconductor device having at least three electrodes (H03C0001340000, H03C0001500000, H03C0001520000, H03C0001620000 take precedence);;
H03C0001380000	carrier applied to base of a transistor
H03C0001400000	modulating signal applied to collector
H03C0001420000	modulating signal applied to base
H03C0001440000	modulating signal applied to emitter
H03C0001460000	Modulators with mechanically- or acoustically-driven parts
H03C0001480000	by means of Hall-effect devices
H03C0001500000	by converting angle modulation to amplitude modulation (H03C0001280000-H03C0001340000, H03C0001460000, H03C0001480000 take precedence);;
H03C0001520000	Modulators in which carrier or one sideband is wholly or partially suppressed (H03C0001280000-H03C0001340000, H03C0001460000, H03C0001480000 take precedence);;
H03C0001540000	Balanced modulators, e.g. bridge type, ring type, double balanced type
H03C0001560000	comprising variable two-pole elements only
H03C0001580000	comprising diodes
H03C0001600000	with one sideband wholly or partially suppressed
H03C0001620000	Modulators in which amplitude of carrier component in output is dependent upon strength of modulating signal, e.g. no carrier output when no modulating signal is present (H03C0001280000-H03C0001340000, H03C0001460000, H03C0001480000 take precedence);;
H03C0003000000	Angle modulation (H03C0005000000, H03C0007000000 take precedence);;
H03C0003020000	Details
H03C0003040000	Means in, or combined with, modulating stage for reducing amplitude modulation
H03C0003060000	Means for changing frequency deviation
H03C0003080000	Modifications of modulator to linearise modulation, e.g. by feedback, and clearly applicable to more than one type of modulator
H03C0003090000	Modifications of modulator for regulating the mean frequency
H03C0003100000	by means of variable impedance (H03C0003300000-H03C0003380000;  take precedence);;
H03C0003120000	by means of a variable reactive element
H03C0003140000	simulated by circuit comprising active element with at least three electrodes, e.g. reactance-tube circuit
H03C0003160000	in which the active element simultaneously serves as the active element of an oscillator
H03C0003180000	the element being a current-dependent inductor
H03C0003200000	the element being a voltage-dependent capacitor
H03C0003220000	the element being a semiconductor diode, e.g. varicap diode
H03C0003240000	by means of a variable resistive element, e.g. tube
H03C0003260000	comprising two elements controlled in push-pull by modulating signal
H03C0003280000	using variable impedance driven mechanically or acoustically
H03C0003300000	by means of transit-time tube
H03C0003320000	the tube being a magnetron
H03C0003340000	by deflection of electron beam in discharge tube
H03C0003360000	by means of light-sensitive element
H03C0003380000	by converting amplitude modulation to angle modulation
H03C0003400000	using two signal paths the outputs of which have a predetermined phase difference and at least one output being amplitude-modulated
H03C0003420000	by means of electromechanical devices (H03C0003280000 takes precedence);;
H03C0005000000	Amplitude modulation and angle modulation produced simultaneously or at will by the same modulating signal (H03C0007000000 takes precedence);;
H03C0005020000	by means of transit-time tube
H03C0005040000	the tube being a magnetron
H03C0005060000	by deflection of electron beam in discharge tube
H03C0007000000	Modulating electromagnetic waves (devices or arrangements for the modulation of light G02F0001000000;for generating oscillations H03B, H03K)
H03C0007020000	in transmission line, waveguide, cavity resonator, or radiation field of aerial
H03C0007040000	Polarisation of transmitted wave being modulated
H03D	DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER (masers, lasers H01S;circuits capable of acting both as modulator and demodulator H03C; details applicable to both modulators and frequency-changers H03C; demodulating pulses H03K0009000000; transforming types of pulse modulation H03K0011000000; coding, decoding or code conversion, in general H03M; repeater stations H04B0007140000; demodulators adapted for ac systems of digital-information transmission H04L0027000000; synchronous demodulators adapted for colour television H04N0009660000)
H03D0001000000	Demodulation of amplitude-modulated oscillations (H03D0005000000, H03D0009000000, H03D0011000000 take precedence);;
H03D0001020000	Details
H03D0001040000	Modifications of demodulators to reduce interference by undesired signals
H03D0001060000	Modifications of demodulators to reduce distortion, e.g. by negative feedback
H03D0001080000	by means of non-linear two-pole elements (H03D0001220000, H03D0001260000, H03D0001280000 take precedence);;
H03D0001100000	of diodes
H03D0001120000	with provision for equalising ac and dc loads
H03D0001140000	by means of non-linear elements having more than two poles (H03D0001220000, H03D0001260000, H03D0001280000 take precedence);;
H03D0001160000	of discharge tubes
H03D0001180000	of semiconductor devices
H03D0001200000	with provision for preventing undesired type of demodulation, e.g. preventing anode detection in a grid detection circuit
H03D0001220000	Homodyne or synchrodyne circuits
H03D0001240000	for demodulation of signals wherein one sideband or the carrier has been wholly or partially suppressed
H03D0001260000	by means of transit-time tubes
H03D0001280000	by deflecting an electron beam in a discharge tube (H03D0001260000 takes precedence);;
H03D0003000000	Demodulation of angle-modulated oscillations (H03D0005000000, H03D0009000000, H03D0011000000 take precedence);;
H03D0003020000	by detecting phase difference between two signals obtained from input signal (H03D0003280000-H03D0003320000;  take precedence;limiting arrangements H03G0011000000)
H03D0003040000	by counting or integrating cycles of oscillations
H03D0003060000	by combining signals additively or in product demodulators
H03D0003080000	by means of diodes, e.g. Foster-Seeley discriminator
H03D0003100000	in which the diodes are simultaneously conducting during the same half period of the signal, e.g. ratio detector
H03D0003120000	by means of discharge tubes having more than two electrodes
H03D0003140000	by means of semiconductor devices having more than two electrodes
H03D0003160000	by means of electromechanical resonators
H03D0003180000	by means of synchronous gating arrangements
H03D0003200000	producing pulses whose amplitude or duration depends on the phase difference
H03D0003220000	by means of active elements with more than two electrodes to which two signals are applied derived from the signal to be demodulated and having a phase difference related to the frequency deviation, e.g. phase detector
H03D0003240000	Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits
H03D0003260000	by means of sloping amplitude/frequency characteristic of tuned or reactive circuit (H03D0003280000-H03D0003320000;  take precedence);;
H03D0003280000	Modifications of demodulators to reduce effect of temperature variations (automatic frequency control H03L);;
H03D0003300000	by means of transit-time tubes
H03D0003320000	by deflecting an electron beam in a discharge tube (H03D0003300000 takes precedence);;
H03D0003340000	by means of electromechanical devices (H03D0003160000 takes precedence);;
H03D0005000000	Circuits for demodulating amplitude-modulated or angle-modulated oscillations at will (H03D0009000000, H03D0011000000 take precedence);;
H03D0007000000	Transference of modulation from one carrier to another, e.g. frequency-changing (H03D0009000000, H03D0011000000 take precedence;dielectric amplifiers, magnetic amplifiers, parametric amplifiers used as frequency-changers H03F)
H03D0007020000	by means of diodes (H03D0007140000-H03D0007220000;  take precedence);;
H03D0007040000	having negative resistance characteristic, e.g. tunnel diode
H03D0007060000	by means of discharge tubes having more than two electrodes (H03D0007140000-H03D0007220000;  take precedence);;
H03D0007080000	the signals to be mixed being applied between the same two electrodes
H03D0007100000	the signals to be mixed being applied between different pairs of electrodes
H03D0007120000	by means of semiconductor devices having more than two electrodes (H03D0007140000-H03D0007220000;  take precedence);;
H03D0007140000	Balanced arrangements
H03D0007160000	Multiple frequency-changing
H03D0007180000	Modifications of frequency-changers for eliminating image frequencies
H03D0007200000	by means of transit-time tubes
H03D0007220000	by deflecting an electron beam in a discharge tube (H03D0007200000 takes precedence);;
H03D0009000000	Demodulation or transference of modulation of modulated electromagnetic waves (devices or arrangements for demodulating light, transferring modulation in light waves G02F0002000000);;
H03D0009020000	Demodulation using distributed inductance and capacitance, e.g. in feeder lines
H03D0009040000	for angle-modulated oscillations
H03D0009060000	Transference of modulation using distributed inductance and capacitance
H03D0011000000	Super-regenerative demodulator circuits
H03D0011020000	for amplitude-modulated oscillations
H03D0011040000	by means of semiconductor devices having more than two electrodes
H03D0011060000	for angle-modulated oscillations
H03D0011080000	by means of semiconductor devices having more than two electrodes
H03D0013000000	Circuits for comparing the phase or frequency of two mutually-independent oscillations
H03F	AMPLIFIERS (measuring, testing G01R;optical parametric amplifiers G02F; circuit arrangements with secondary emission tubes H01J0043300000; masers, lasers H01S; control of amplification H03G; coupling arrangements independent of the nature of the amplifier, voltage dividers H03H; amplifiers capable only of dealing with pulses H03K; repeater circuits in transmission lines H04B0003360000, H04B0003580000; application of speech amplifiers in telephonic communication H04M0001600000, H04M0003400000)
H03F0001000000	Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
H03F0001020000	Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
H03F0001040000	in discharge-tube amplifiers
H03F0001060000	to raise the efficiency of amplifying modulated radio frequency waves; to raise the efficiency of amplifiers acting also as modulators
H03F0001070000	Doherty-type amplifiers
H03F0001080000	Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements (wide-band amplifiers with inter-stage coupling networks incorporating these impedances H03F0001420000;eliminating transit-time effects in vacuum tubes H01J0021340000)
H03F0001100000	by use of amplifying elements with multiple electrode connections
H03F0001120000	by use of attenuating means
H03F0001130000	in discharge-tube amplifiers
H03F0001140000	by use of neutralising means
H03F0001160000	in discharge-tube amplifiers
H03F0001180000	by use of distributed coupling
H03F0001200000	in discharge-tube amplifiers
H03F0001220000	by use of cascode coupling, i.e. earthed cathode or emitter stage followed by earthed grid or base stage respectively
H03F0001240000	in discharge-tube amplifiers
H03F0001260000	Modifications of amplifiers to reduce influence of noise generated by amplifying elements
H03F0001280000	in discharge-tube amplifiers
H03F0001300000	Modifications of amplifiers to reduce influence of variations of temperature or supply voltage
H03F0001320000	Modifications of amplifiers to reduce non-linear distortion (by negative feedback H03F0001340000);;
H03F0001330000	in discharge-tube amplifiers
H03F0001340000	Negative-feedback-circuit arrangements with or without positive feedback (H03F0001020000-H03F0001300000, H03F0001380000-H03F0001500000, H03F0003500000 take precedence);;
H03F0001360000	in discharge-tube amplifiers
H03F0001380000	Positive-feedback circuit arrangements without negative feedback
H03F0001400000	in discharge-tube amplifiers
H03F0001420000	Modifications of amplifiers to extend the bandwidth
H03F0001440000	of tuned amplifiers
H03F0001460000	with tubes only
H03F0001480000	of aperiodic amplifiers
H03F0001500000	with tubes only
H03F0001520000	Circuit arrangements for protecting such amplifiers
H03F0001540000	with tubes only
H03F0001560000	Modifications of input or output impedances, not otherwise provided for
H03F0003000000	Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
H03F0003020000	with tubes only (subsequent subgroups take precedence)
H03F0003040000	with semiconductor devices only (subsequent subgroups take precedence);
H03F0003060000	using hole storage effect
H03F0003080000	controlled by light
H03F0003100000	with diodes
H03F0003120000	with Esaki diodes
H03F0003140000	with amplifying devices having more than three electrodes or more than two PN junctions
H03F0003160000	with field-effect devices
H03F0003180000	with semiconductor devices of complementary types (subsequent subgroups take precedence);
H03F0003181000	Low-frequency amplifiers, e.g. audio preamplifiers
H03F0003183000	with semiconductor devices only
H03F0003185000	with field-effect devices (H03F0003187000 takes precedence);;
H03F0003187000	in integrated circuits
H03F0003189000	High-frequency amplifiers, e.g. radio frequency amplifiers
H03F0003190000	with semiconductor devices only
H03F0003191000	Tuned amplifiers (H03F0003193000, H03F0003195000 take precedence);;
H03F0003193000	with field-effect devices (H03F0003195000 takes precedence);;
H03F0003195000	in integrated circuits
H03F0003200000	Power amplifiers, e.g. Class B amplifier, Class C amplifier (H03F0003260000-H03F0003320000;  take precedence);;
H03F0003210000	with semiconductor devices only
H03F0003213000	in integrated circuits
H03F0003217000	Class D power amplifiers; Switching amplifiers
H03F0003220000	with tubes only (H03F0003240000 takes precedence);;
H03F0003240000	of transmitter output stages
H03F0003260000	Push-pull amplifiers; Phase-splitters therefor (duplicated single-ended push-pull arrangements or phase-splitters therefor H03F0003300000);;
H03F0003280000	with tubes only
H03F0003300000	Single-ended push-pull amplifiers; Phase-splitters therefor
H03F0003320000	with tubes only
H03F0003340000	Dc amplifiers in which all stages are dc-coupled (H03F0003450000 takes precedence);;
H03F0003343000	with semiconductor devices only
H03F0003345000	with field-effect devices (H03F0003347000 takes precedence);;
H03F0003347000	in integrated circuits
H03F0003360000	with tubes only
H03F0003380000	Dc amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers (modulators in general H03C;demodulators in general H03D; amplitude modulation of pulses in general H03K0007020000; amplitude demodulation of pulses in general H03K0009020000)
H03F0003387000	with semiconductor devices only
H03F0003393000	with field-effect devices
H03F0003400000	with tubes only
H03F0003420000	Amplifiers with two or more amplifying elements having their dc paths in series with the load, the control electrode of each element being excited by at least part of the input signal, e.g. so-called totem-pole amplifiers
H03F0003440000	with tubes only
H03F0003450000	Differential amplifiers
H03F0003460000	Reflex amplifiers
H03F0003480000	with tubes only
H03F0003500000	Amplifiers in which input is applied to, or output is derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower
H03F0003520000	with tubes only
H03F0003540000	Amplifiers using transit-time effect in tubes or semiconductor devices (parametric amplifiers H03F0007000000;solid state travelling-wave devices H01L0045020000)
H03F0003550000	with semiconductor devices only
H03F0003560000	using klystrons
H03F0003580000	using travelling-wave tubes
H03F0003600000	Amplifiers in which coupling networks have distributed constants, e.g. with waveguide resonators (H03F0003540000 takes precedence);;
H03F0003620000	Two-way amplifiers
H03F0003640000	with tubes only
H03F0003660000	Amplifiers simultaneously generating oscillations of one frequency and amplifying signals of another frequency
H03F0003680000	Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
H03F0003700000	Charge amplifiers
H03F0003720000	Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
H03F0005000000	Amplifiers with both discharge tubes and semiconductor devices as amplifying elements
H03F0007000000	Parametric amplifiers (devices or arrangements for the parametric generation or amplification of light, infra-red or ultra-violet waves G02F0001390000);;
H03F0007020000	using variable-inductance element; using variable-permeability element
H03F0007040000	using variable-capacitance element; using variable-permittivity element
H03F0007060000	with electron beam tube
H03F0009000000	Magnetic amplifiers
H03F0009020000	current-controlled, i.e. the load current flowing in both directions through a main coil
H03F0009040000	voltage-controlled, i.e. the load current flowing in only one direction through a main coil, e.g. Logan circuits (H03F0009060000 takes precedence);;
H03F0009060000	Control by voltage time integral, i.e. the load current flowing in only one direction through a main coil, whereby the main coil winding also can be used as a control winding, e.g. Ramey circuits
H03F0011000000	Dielectric amplifiers
H03F0013000000	Amplifiers using amplifying element consisting of two mechanically- or acoustically-coupled transducers, e.g. telephone-microphone amplifier
H03F0015000000	Amplifiers using galvano-magnetic effects not involving mechanical movement, e.g. using Hall effect
H03F0017000000	Amplifiers using electroluminescent element or photocell
H03F0019000000	Amplifiers using superconductivity effects
H03F0021000000	Amplifiers not covered by groups  H03F0003000000-H03F0019000000; (dynamo-electric amplifiers H02K);;
H03G	CONTROL OF AMPLIFICATION (impedance networks, e.g. attenuators, H03H;control of transmission in lines H04B0003040000)
H03G0001000000	Details of arrangements for controlling amplification
H03G0001020000	Remote control of amplification, tone, or bandwidth (remote control in general G05, G08;combined with remote tuning or selection of resonant circuits H03J)
H03G0001040000	Modifications of control circuit to reduce distortion caused by control (modifications to reduce influence of variations of internal impedance of amplifying elements caused by control H03F0001080000);;
H03G0003000000	Gain control in amplifiers or frequency changers (gated amplifiers H03F0003720000;peculiar to television receivers H04N)
H03G0003020000	Manually-operated control
H03G0003040000	in untuned amplifiers
H03G0003060000	having discharge tubes
H03G0003080000	incorporating negative feedback
H03G0003100000	having semiconductor devices
H03G0003120000	incorporating negative feedback
H03G0003140000	in frequency-selective amplifiers
H03G0003160000	having discharge tubes
H03G0003180000	having semiconductor devices
H03G0003200000	Automatic control (combined with volume compression or expansion H03G0007000000);;
H03G0003220000	in amplifiers having discharge tubes
H03G0003240000	Control dependent upon ambient noise level or sound level
H03G0003260000	Muting amplifier when no signal is present
H03G0003280000	in frequency-modulation receivers
H03G0003300000	in amplifiers having semiconductor devices
H03G0003320000	the control being dependent upon ambient noise level or sound level
H03G0003340000	Muting amplifier when no signal is present
H03G0005000000	Tone control or bandwidth control in amplifiers
H03G0005020000	Manually-operated control (variable bandpass or bandstop filters H03H0007120000);;
H03G0005040000	in untuned amplifiers
H03G0005060000	having discharge tubes
H03G0005080000	incorporating negative feedback
H03G0005100000	having semiconductor devices
H03G0005120000	incorporating negative feedback
H03G0005140000	in frequency-selective amplifiers
H03G0005160000	Automatic control
H03G0005180000	in untuned amplifiers
H03G0005200000	having discharge tubes
H03G0005220000	having semiconductor devices
H03G0005240000	in frequency-selective amplifiers
H03G0005260000	having discharge tubes
H03G0005280000	having semiconductor devices
H03G0007000000	Volume compression or expansion in amplifiers
H03G0007020000	having discharge tubes
H03G0007040000	incorporating negative feedback
H03G0007060000	having semiconductor devices
H03G0007080000	incorporating negative feedback
H03G0009000000	Combinations of two or more types of control, e.g. gain control and tone control
H03G0009020000	in untuned amplifiers (combined tone controls for low and high frequencies H03G0005000000);;
H03G0009040000	having discharge tubes
H03G0009060000	for gain control and tone control
H03G0009080000	incorporating negative feedback
H03G0009100000	for tone control and volume expansion or compression
H03G0009120000	having semiconductor devices
H03G0009140000	for gain control and tone control
H03G0009160000	incorporating negative feedback
H03G0009180000	for tone control and volume expansion or compression
H03G0009200000	in frequency-selective amplifiers
H03G0009220000	having discharge tubes
H03G0009240000	having semiconductor devices
H03G0009260000	in untuned amplifying stages as well as in frequency-selective amplifying stages (gain control in both stages H03G0003000000;tone control or bandwidth control H03G0005000000)
H03G0009280000	all amplifying stages having discharge tubes
H03G0009300000	all amplifying stages having semiconductor devices
H03G0011000000	Limiting amplitude; Limiting rate of change of amplitude
H03G0011020000	by means of diodes (H03G0011040000, H03G0011060000, H03G0011080000 take precedence);;
H03G0011040000	Limiting level dependent on strength of signal; Limiting level dependent on strength of carrier on which signal is modulated
H03G0011060000	Limiters of angle-modulated signals; such limiters combined with discriminators (discriminators having an inherent limiting action H03D0003000000);;
H03G0011080000	Limiting rate of change of amplitude
H03H	IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS (measuring, testing G01R;impedance networks or resonators consisting of distributed impedances, e.g. of the waveguide type, H01P; control of amplification, e.g. bandwidth control of amplifiers, H03G; tuning resonant circuits, e.g. tuning coupled resonant circuits, H03J; networks for modifying the frequency characteristics of communication systems H04B)
H03H0001000000	Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network (constructional details of electromechanical transducers H03H0009000000);;
H03H0001020000	of RC networks, e.g. integrated networks
H03H0002000000	Networks using elements or techniques not provided for in groups ; H03H0003000000-H03H0021000000
H03H0003000000	Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
H03H0003007000	for the manufacture of electromechanical resonators or networks
H03H0003013000	for obtaining desired frequency or temperature coefficient (H03H0003040000, H03H0003100000 take precedence);;
H03H0003020000	for the manufacture of piezo-electric or electrostrictive resonators or networks (H03H0003080000 takes precedence);;
H03H0003040000	for obtaining desired frequency or temperature coefficient
H03H0003060000	for the manufacture of magnetostrictive resonators or networks
H03H0003080000	for the manufacture of resonators or networks using surface acoustic waves
H03H0003100000	for obtaining desired frequency or temperature coefficient
H03H0005000000	One-port networks comprising only passive electrical elements as network components
H03H0005020000	without voltage- or current-dependent elements
H03H0005100000	comprising at least one element with prescribed temperature coefficient
H03H0005120000	with at least one voltage- or current-dependent element
H03H0007000000	Multiple-port networks comprising only passive electrical elements as network components (receiver input circuits H04B0001180000;networks simulating a length of communication cable H04B0003400000)
H03H0007010000	Frequency selective two-port networks
H03H0007030000	comprising means for compensation of loss
H03H0007060000	including resistors (H03H0007075000, H03H0007090000, H03H0007120000, H03H0007130000 take precedence);;
H03H0007065000	Parallel T-filters
H03H0007070000	Bridged T-filters
H03H0007075000	Ladder networks, e.g. electric wave filters
H03H0007090000	Filters comprising mutual inductance
H03H0007120000	Bandpass or bandstop filters with adjustable bandwidth and fixed centre frequency (H03H0007090000 takes precedence;automatic control of bandwidth in amplifiers H03G0005160000)
H03H0007130000	using electro-optic elements
H03H0007180000	Networks for phase shifting
H03H0007190000	Two-port phase shifters providing a predetermined phase shift, e.g. "all-pass" filters
H03H0007200000	Two-port phase shifters providing an adjustable phase shift
H03H0007210000	providing two or more phase shifted output signals, e.g. n-phase output
H03H0007240000	Frequency-independent attenuators
H03H0007250000	comprising an element controlled by an electric or magnetic variable (H03H0007270000 takes precedence);;
H03H0007270000	comprising a photo-electric element
H03H0007300000	Time-delay networks
H03H0007320000	with lumped inductance and capacitance
H03H0007340000	with lumped and distributed reactance
H03H0007380000	Impedance-matching networks
H03H0007400000	Automatic matching of load impedance to source impedance
H03H0007420000	Balance/unbalance networks
H03H0007460000	Networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source (for use in multiplex transmission systems H04J0001000000);;
H03H0007480000	Networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source (phase shifters providing two or more output signals H03H0007210000);;
H03H0007520000	One-way transmission networks, i.e. unilines
H03H0007540000	Modifications of networks to reduce influence of variations of temperature
H03H0009000000	Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators (making single crystals C30B;selection of materials thereof H01L; piezo-electric, electrostrictive or magnetostrictive devices in general H01L0041000000; electromechanical transducers H04R)
H03H0009020000	Details
H03H0009050000	Holders; Supports
H03H0009080000	Holders with means for regulating temperature
H03H0009090000	Elastic or damping supports
H03H0009100000	Mounting in enclosures
H03H0009120000	for networks with interaction of optical and acoustic waves
H03H0009125000	Driving means, e.g. electrodes, coils
H03H0009130000	for networks consisting of piezo-electric or electrostrictive materials (H03H0009145000 takes precedence);;
H03H0009135000	for networks consisting of magnetostrictive materials (H03H0009145000 takes precedence);;
H03H0009145000	for networks using surface acoustic waves
H03H0009150000	Constructional features of resonators consisting of piezo-electric or electrostrictive material (H03H0009250000 takes precedence);;
H03H0009170000	having a single resonator (crystal tuning forks H03H0009210000);;
H03H0009190000	consisting of quartz
H03H0009205000	having multiple resonators (crystal tuning forks H03H0009210000);;
H03H0009210000	Crystal tuning forks
H03H0009215000	consisting of quartz
H03H0009220000	Constructional features of resonators consisting of magnetostricitve material
H03H0009240000	Constructional features of resonators of material which is not piezo-electric, electrostrictive, or magnetostrictive
H03H0009250000	Constructional features of resonators using surface acoustic waves
H03H0009300000	Time-delay networks
H03H0009360000	with non-adjustable delay time (H03H0009400000, H03H0009420000 take precedence);;
H03H0009380000	with adjustable delay time (H03H0009400000, H03H0009420000 take precedence);;
H03H0009400000	Frequency-dependent delay lines, e.g. dispersive delay lines (H03H0009420000 takes precedence);;
H03H0009420000	using surface acoustic waves
H03H0009440000	Frequency-dependent delay lines, e.g. dispersive delay lines
H03H0009460000	Filters (multiple-port electromechanical filters H03H0009700000);;
H03H0009480000	Coupling means therefor
H03H0009500000	Mechanical coupling means
H03H0009520000	Electric coupling means
H03H0009540000	comprising resonators of piezo-electric or electrostrictive material (H03H0009640000 takes precedence);;
H03H0009560000	Monolithic crystal filters
H03H0009580000	Multiple crystal filters
H03H0009600000	Electric coupling means therefor
H03H0009620000	comprising resonators of magnetostrictive material (H03H0009640000 takes precedence);;
H03H0009640000	using surface acoustic waves
H03H0009660000	Phase shifters
H03H0009680000	using surface acoustic waves
H03H0009700000	Multiple-port networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common or source
H03H0009720000	Networks using surface acoustic waves
H03H0009740000	Multiple-port networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source (networks for phase shifting H03H0009660000);;
H03H0009760000	Networks using surface acoustic waves
H03H0011000000	Networks using active elements
H03H0011020000	Multiple-port networks
H03H0011040000	Frequency selective two-port networks
H03H0011060000	comprising means for compensation of loss
H03H0011080000	using gyrators
H03H0011100000	using negative impedance converters (H03H0011080000 takes precedence);;
H03H0011120000	using amplifiers with feedback (H03H0011080000, H03H0011100000 take precedence);;
H03H0011140000	using electro-optic devices
H03H0011160000	Networks for phase shifting
H03H0011180000	Two-port phase shifters providing a predetermined phase shift, e.g. "all-pass" filters
H03H0011200000	Two-port phase shifters providing an adjustable phase shift
H03H0011220000	providing two or more phase shifted output signals, e.g. n-phase output
H03H0011240000	Frequency-independent attenuators
H03H0011260000	Time-delay networks (analogue shift registers G11C0027040000);;
H03H0011280000	Impedance matching networks
H03H0011300000	Automatic matching of source impedance to load impedance
H03H0011320000	Balance-unbalance networks
H03H0011340000	Networks for connecting several sources or loads working on different frequencies or frequency bands, to a common load or source (for use in multiplex transmission systems H04J0001000000);;
H03H0011360000	Networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source (phase shifters providing two or more output signals H03H0011220000);;
H03H0011380000	One-way transmission networks, i.e. unilines
H03H0011400000	Impedance converters
H03H0011420000	Gyrators (used in frequency selective networks H03H0011080000);;
H03H0011440000	Negative impedance converters (H03H0011420000 takes precedence;used in frequency-selective networks H03H0011100000)
H03H0011460000	One-port networks
H03H0011480000	simulating reactances
H03H0011500000	using gyrators
H03H0011520000	simulating negative resistances
H03H0011540000	Modifications of networks to reduce influence of variations of temperature
H03H0015000000	Transversal filters (electromechanical filters H03H0009460000, H03H0009700000);;
H03H0015020000	using analogue shift registers
H03H0017000000	Networks using digital techniques
H03H0017020000	Frequency-selective networks
H03H0017040000	Recursive filters
H03H0017060000	Non-recursive filters
H03H0017080000	Networks for phase-shifting
H03H0019000000	Networks using time-varying elements, e.g. N-path filters
H03H0021000000	Adaptive networks
H03J	TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS (indicating arrangements for measuring G01D;measuring, testing G01R; remote-control in general G05, G08; automatic control or stabilisation of generators H03L)
H03J0001000000	Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general (machine elements in general F16;coupling of knobs to shafts F16D)
H03J0001020000	Indicating arrangements
H03J0001040000	with optical indicating means
H03J0001060000	Driving or adjusting arrangements; combined with other driving or adjusting arrangements, e.g. of gain control
H03J0001080000	Toothed-gear drive; Worm drive
H03J0001100000	Rope drive; Chain drive
H03J0001120000	Friction drive
H03J0001140000	Special arrangements for fine and coarse tuning
H03J0001160000	Single control means independently performing two or more functions
H03J0001180000	Control by auxiliary power
H03J0001200000	the auxiliary power being switched on as long as controlling current is switched on
H03J0001220000	with stepping arrangements actuated by control pulses
H03J0003000000	Continuous tuning (H03J0007000000, H03J0009000000 take precedence;combination of continuous and discontinuous tuning other than for bandspreading H03J0005000000)
H03J0003020000	Details
H03J0003040000	Arrangements for compensating for variations of physical values, e.g. temperature (automatic control of ambient conditions G05D);;
H03J0003060000	Arrangements for obtaining constant bandwidth or gain throughout tuning range or ranges (automatic gain control H03G);;
H03J0003080000	by varying a second parameter simultaneously with the tuning, e.g. coupling bandpass filter
H03J0003100000	Circuit arrangements for fine tuning, e.g. bandspreading
H03J0003120000	Electrically-operated arrangements for indicating correct tuning
H03J0003140000	Visual indication, e.g. magic eye
H03J0003160000	Tuning without displacement of reactive element, e.g. by varying permeability
H03J0003180000	by discharge tube or semiconductor device simulating variable reactance
H03J0003200000	of single resonant circuit by varying inductance only or capacitance only
H03J0003220000	of single resonant circuit by varying inductance and capacitance simultaneously
H03J0003240000	of more than one resonant circuit simultaneously, the circuits being tuned to substantially the same frequency, e.g. for single-knob tuning
H03J0003260000	the circuits being coupled so as to form a bandpass filter
H03J0003280000	of more than one resonant circuit simultaneously, the tuning frequencies of the circuits having a substantially constant difference throughout the tuning range
H03J0003300000	Arrangements for ensuring tracking with variable inductors
H03J0003320000	Arrangements for ensuring tracking with variable capacitors
H03J0005000000	Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner (H03J0007000000, H03J0009000000 take precedence;for bandspreading H03J0003100000)
H03J0005020000	with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
H03J0005040000	operated by hand
H03J0005060000	Settings determined by single indexing means with snap action
H03J0005080000	Settings determined by a number of separately-actuated positioning means
H03J0005100000	Settings determined by a number of positioning means mounted on a common support, which is adjustable to desired positions, a different positioning means being in operation in each position
H03J0005120000	Settings determined by a number of separately-actuated driving means which adjust the tuning element directly to desired settings
H03J0005140000	operated by auxiliary power
H03J0005160000	Settings determined by a number of separate positioning means actuated by hand
H03J0005180000	Settings determined by a number of separate positioning means actuated by electromagnets
H03J0005200000	Settings determined by a number of positioning means actuated by a second means adjustable to different positions by the same or by a second auxiliary power
H03J0005220000	Settings determined by a number of separately actuated driving means which adjust the tuning element directly to desired settings
H03J0005240000	with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection, for television channel selection (switches in general H01H);;
H03J0005260000	operated by hand
H03J0005280000	Tuning circuits or elements supported on a revolving member with contacts arranged in a plane perpendicular to the axis
H03J0005300000	Tuning circuits or elements supported on a revolving member with contacts arranged in lines parallel to the axis
H03J0005320000	Stationary tuning circuits or elements selected by push-button
H03J0007000000	Automatic frequency control; Automatic scanning over a band of frequencies
H03J0007020000	Automatic frequency control (H03J0007180000 takes precedence;automatic tuning control for television receivers H04N0005500000)
H03J0007040000	where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
H03J0007060000	using counters or frequency dividers
H03J0007080000	using varactors, i.e. voltage variable reactive diodes (H03J0007060000 takes precedence);;
H03J0007100000	Modification of automatic frequency control sensitivity or linearising automatic frequency control operation
H03J0007120000	Combination of automatic frequency control voltage with stabilised varactor supply voltage
H03J0007140000	Controlling the magnetic state of inductor cores (H03J0007060000 takes precedence);;
H03J0007160000	where the frequency control is accomplished by mechanical means, e.g. by a motor
H03J0007180000	Automatic scanning over a band of frequencies
H03J0007200000	where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element
H03J0007220000	in which an automatic frequency control circuit is brought into action after the scanning action has been stopped (H03J0007240000 takes precedence);;
H03J0007240000	using varactors, i.e. voltage variable reactive diodes (H03J0007280000 takes precedence);;
H03J0007260000	in which an automatic frequency control circuit is brought into action after the scanning action has been stopped
H03J0007280000	using counters or frequency dividers
H03J0007300000	where the scanning is accomplished by mechanical means, e.g. by a motor
H03J0007320000	with simultaneous display of received frequencies, e.g. panoramic receivers
H03J0009000000	Remote-control of tuned circuits; Combined remote-control of tuning and other functions, e.g. brightness, amplification (mechanical remote-control arrangements H03J0001000000);;
H03J0009020000	using radio transmission; using near-field transmission
H03J0009040000	using ultrasonic, sonic or infrasonic waves
H03J0009060000	using electromagnetic waves other than radio waves, e.g. light
H03K	PULSE TECHNIQUE (measuring pulse characteristics G01R;mechanical counters having an electrical input G06M; information storage devices in general G11; sample-and-hold arrangements in electric analogue stores G11C0027020000; construction of switches involving contact making and breaking for generation of pulses, e.g. by using a moving magnet, H01H; static conversion of electric power H02M; generation of oscillations by circuits employing active elements which operate in a non-switching manner H03B; modulating sinusoidal oscillations with pulses H03C, H04L; discriminator circuits involving pulse counting H03D; automatic control of generators H03L; starting, synchronisation, or stabilisation of generators where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M)
H03K0003000000	Generating electric pulses (H03K0004000000 takes precedence);;
H03K0003010000	Details
H03K0003013000	Modifications of generator to prevent operation by noise or interference
H03K0003017000	Adjustment of width or dutycycle of pulses (pulse width modulation H03K0007080000);;
H03K0003020000	Generators characterised by the type of circuit or other means used for producing pulses (H03K0003640000-H03K0003840000;  take precedence);;
H03K0003023000	using differential amplifiers or comparators, with internal or external positive feedback
H03K0003027000	using logic circuits, with internal or external positive feedback
H03K0003030000	Astable generators
H03K0003033000	Mono-stable generators
H03K0003037000	Bi-stable generators
H03K0003040000	using as active elements vacuum tubes only, with positive feedback (H03K0003023000, H03K0003027000 take precedence);;
H03K0003050000	using means other than a transformer for feedback
H03K0003060000	using at least two tubes so coupled that the input of one is derived from the output of another, e.g. multivibrator
H03K0003080000	astable
H03K0003090000	Stabilisation of output
H03K0003100000	mono-stable
H03K0003120000	bi-stable
H03K0003140000	multi-stable
H03K0003150000	Circuits of which the state is dependent on the level of the input signal, e.g. Schmitt trigger
H03K0003160000	using a transformer for feedback, e.g. blocking oscillator with saturable core
H03K0003220000	specially adapted for amplitude comparison, i.e. Multiar
H03K0003260000	using as active elements bipolar transistors with internal or external positive feedback (H03K0003023000, H03K0003027000 take precedence);;
H03K0003280000	using means other than a transformer for feedback
H03K0003281000	using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
H03K0003282000	astable
H03K0003283000	Stabilisation of output
H03K0003284000	mono-stable
H03K0003286000	bi-stable (H03K0003295000 takes precedence);;
H03K0003287000	using additional transistors in the feedback circuit (H03K0003289000 takes precedence);;
H03K0003288000	using additional transistors in the input circuit (H03K0003289000 takes precedence);;
H03K0003289000	of the master-slave type
H03K0003290000	multi-stable
H03K0003295000	Circuits of which the state is dependent on the level of the input signal, e.g. Schmitt trigger
H03K0003300000	using a transformer for feedback, e.g. blocking oscillator
H03K0003313000	using as active elements semiconductor devices with two electrodes, one or two potential-jump barriers, and exhibiting a negative resistance characteristic
H03K0003315000	using tunnel diodes
H03K0003330000	using as active elements semiconductor devices exhibiting hole storage or enhancement effect
H03K0003335000	using as active elements semiconductor devices with more than two electrodes and exhibiting avalanche effect
H03K0003350000	using as active elements semiconductor devices with more than two PN junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region (H03K0003023000, H03K0003027000 take precedence);;
H03K0003351000	using unijunction transistors
H03K0003352000	using thyristors
H03K0003353000	using as active elements field effect transistors with internal or external positive feedback (H03K0003023000, H03K0003027000 take precedence);;
H03K0003354000	Astable generators
H03K0003355000	Mono-stable generators
H03K0003356000	Bi-stable generators
H03K0003357000	using as active elements bulk negative resistance devices, e.g. Gunn-effect devices
H03K0003360000	using semiconductors as active elements and not otherwise provided for
H03K0003370000	using gas-filled tubes as active elements, e.g. astable trigger circuits (H03K0003550000 takes precedence);;
H03K0003380000	using superconductive devices as active elements
H03K0003400000	using electrochemical cells as active elements
H03K0003420000	using electro-optical devices as active elements to produce electric pulses
H03K0003430000	using beam deflection tubes as active elements
H03K0003450000	using as active elements non-linear magnetic devices; using as active elements non-linear dielectric devices
H03K0003470000	using parametrons
H03K0003490000	using ferro-resonant devices
H03K0003510000	using multi-aperture magnetic cores, e.g. transfluxor
H03K0003530000	using an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback (H03K0003335000 takes precedence);;
H03K0003537000	using spark gaps
H03K0003543000	using vacuum tubes
H03K0003550000	using gas-filled tubes having a control electrode
H03K0003570000	using semiconductor devices
H03K0003590000	using galvano-magnetic devices, e.g. Hall-effect devices
H03K0003640000	Generators producing trains of pulses, i.e. finite sequences of pulses
H03K0003660000	by interrupting the output of a generator
H03K0003700000	time intervals between all adjacent pulses of one train being equal
H03K0003720000	with means for varying repetition rate of trains
H03K0003780000	Generating a single train of pulses having a predetermined pattern, e.g. a predetermined number
H03K0003800000	Generating trains of sinusoidal oscillations (by interrupting H03C, H04L);;
H03K0003840000	Generating pulses having a predetermined statistical distribution of a parameter, e.g. random pulse generators
H03K0003860000	Generating pulses by means of delay lines and not covered by the preceding subgroups
H03K0004000000	Generating pulses having essentially a finite slope or stepped portions
H03K0004020000	having stepped portions, e.g. staircase waveform
H03K0004040000	having parabolic shape
H03K0004060000	having triangular shape
H03K0004080000	having sawtooth shape
H03K0004100000	using as active elements vacuum tubes only
H03K0004120000	in which a sawtooth voltage is produced across a capacitor
H03K0004140000	using two tubes so coupled that the input of each one is derived from the output of the other, e.g. multivibrator
H03K0004160000	using a single tube with positive feedback through transformer, e.g. blocking oscillator
H03K0004180000	using a single tube exhibiting negative resistance between two of its electrodes, e.g. transitron, dynatron
H03K0004200000	using a tube with negative feedback by capacitor, e.g. Miller integrator
H03K0004220000	combined with transitron, e.g. phantastron, sanatron
H03K0004240000	Boot-strap generators
H03K0004260000	in which a sawtooth current is produced through an inductor
H03K0004280000	using a tube operating as a switching device
H03K0004320000	combined with means for generating the driving pulses
H03K0004340000	using a single tube with positive feedback through a transformer
H03K0004360000	using a single tube exhibiting negative resistance between two of its electrodes, e.g. transitron, dynatron
H03K0004380000	combined with Miller integrator
H03K0004390000	using a tube operating as an amplifier
H03K0004410000	with negative feedback through a capacitor, e.g. Miller integrator
H03K0004430000	combined with means for generating the driving pulses
H03K0004480000	using as active elements semiconductor devices (H03K0004787000-H03K0004840000;  take precedence);;
H03K0004500000	in which a sawtooth voltage is produced across a capacitor
H03K0004520000	using two semiconductor devices so coupled that the input of each one is derived from the output of the other, e.g. multivibrator
H03K0004540000	using a single semiconductor device with positive feedback through a transformer, e.g. blocking oscillator
H03K0004560000	using a semiconductor device with negative feedback through a capacitor, e.g. Miller integrator
H03K0004580000	Boot-strap generators
H03K0004600000	in which a sawtooth current is produced through an inductor
H03K0004620000	using a semiconductor device operating as a switching device
H03K0004640000	combined with means for generating the driving pulses
H03K0004660000	using a single device with positive feedback, e.g. blocking oscillator
H03K0004680000	Generators in which the switching device is conducting during the fly-back part of the cycle
H03K0004690000	using a semiconductor device operating as an amplifier
H03K0004710000	with negative feedback through a capacitor, e.g. Miller integrator
H03K0004720000	combined with means for generating the driving pulses
H03K0004787000	using as active elements semiconductor devices with two electrodes and exhibiting a negative resistance characteristic
H03K0004793000	using tunnel diodes
H03K0004800000	using as active elements multi-layer diodes
H03K0004830000	using as active elements semiconductor devices with more than two PN junctions or with more than three electrodes or more than one electrode connected to the same conductivity region
H03K0004840000	Generators in which the semiconductor device is conducting during the fly-back part of the cycle
H03K0004860000	using as active elements gas-filled tubes
H03K0004880000	using as active elements electrochemical cells
H03K0004900000	Linearisation of ramp; Synchronisation of pulses (in pictorial communication systems H04N0001360000, H04N0005040000;colour synchronisation H04N0009440000)
H03K0004920000	having a waveform comprising a portion of a sinusoid (generating sinusoidal oscillations H03B);;
H03K0004940000	having trapezoidal shape
H03K0005000000	Manipulating pulses not covered by one of the other main groups in this subclass (circuits with regenerative action H03K0003000000, H03K0004000000;using non-linear magnetic or dielectric devices H03K0003450000)
H03K0005010000	Shaping pulses
H03K0005020000	by amplifying (H03K0005040000 takes precedence;wide-band amplifiers in general H03F)
H03K0005040000	by increasing duration; by decreasing duration
H03K0005050000	using time reference signals, e.g. clock signals
H03K0005060000	using delay lines
H03K0005070000	using resonant circuits
H03K0005080000	by limiting, by thresholding, by slicing, i.e. combined limiting and thresholding (H03K0005070000 takes precedence;comparing one pulse with another H03K0005220000; providing a determined threshold for switching H03K0017300000)
H03K0005120000	by steepening leading or trailing edges
H03K0005130000	Arrangements having a single output and transforming input signals into pulses delivered at desired time intervals
H03K0005135000	using time reference signals, e.g. clock signals
H03K0005140000	using delay lines
H03K0005145000	using resonant circuits
H03K0005150000	Arrangements in which pulses are delivered at different times at several outputs, i.e. pulse distributors (distributing, switching, or gating arrangements H03K0017000000);;
H03K0005153000	Arrangements in which a pulse is delivered at the instant when a predetermined characteristic of an input signal is present or at a fixed time interval after this instant (switching at zero crossing H03K0017130000);;
H03K0005156000	Arrangements in which a continuous pulse train is transformed into a train having a desired pattern
H03K0005159000	Applications of delay lines not covered by the preceding subgroups
H03K0005190000	Monitoring patterns of pulse trains (indicating amplitude G01R0019000000;indicating frequency G01R0023000000; measuring characteristics of individual pulses G01R0029020000)
H03K0005220000	Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral (indicating phase difference of two cyclic pulse trains G01R0025000000);;
H03K0005240000	the characteristic being amplitude
H03K0005260000	the characteristic being duration, interval, position, frequency, or sequence
H03K0006000000	Manipulating pulses having a finite slope and not covered by one of the other main groups of this subclass (circuits with regenerative action H03K0004000000);;
H03K0006020000	Amplifying pulses
H03K0006040000	Modifying slopes of pulses
H03K0007000000	Modulating pulses with a continuously-variable modulating signal
H03K0007020000	Amplitude modulation, i.e. PAM
H03K0007040000	Position modulation, i.e. PPM
H03K0007060000	Frequency or rate modulation, i.e. PFM or PRM
H03K0007080000	Duration or width modulation
H03K0007100000	Combined modulation, e.g. rate modulation and amplitude modulation
H03K0009000000	Demodulating pulses which have been modulated with a continuously-variable signal
H03K0009020000	of amplitude-modulated pulses
H03K0009040000	of position-modulated pulses
H03K0009060000	of frequency- or rate-modulated pulses
H03K0009080000	of duration- or width-modulated pulses
H03K0009100000	of pulses having combined modulation
H03K0011000000	Transforming types of modulation, e.g. position-modulated pulses into duration-modulated pulses
H03K0012000000	Producing pulses by distorting or combining sinusoidal waveforms (combining sinewaves using elements operating in a non-switching manner H03B);;
H03K0017000000	Electronic switching or gating, i.e. not by contact-making and -breaking (sample-and-hold arrangements G11C0027020000;switching or interrupting devices in waveguides H01P; gated amplifiers H03F0003720000; switching arrangements for exchange systems using static devices H04Q0003520000)
H03K0017040000	Modifications for accelerating switching
H03K0017060000	Modifications for ensuring a fully conducting state
H03K0017080000	Modifications for protecting switching circuit against overload
H03K0017100000	Modifications for increasing the maximum permissible switched voltage
H03K0017120000	Modifications for increasing the maximum permissible switched current
H03K0017130000	Modifications for switching at zero crossing (generating an impulse at zero crossing H03K0005153000);;
H03K0017140000	Modifications for compensating variations of physical values, e.g. of temperature
H03K0017160000	Modifications for eliminating interference voltages or currents
H03K0017180000	Modifications for indicating state of switch
H03K0017200000	Modifications for resetting core switching units to a predetermined state
H03K0017220000	Modifications for ensuring a predetermined initial state when the supply voltage has been applied (bi-stable generators H03K0003120000);;
H03K0017240000	Storing the actual state when the supply voltage fails
H03K0017260000	Modifications for temporary blocking after receipt of control pulses
H03K0017280000	Modifications for introducing a time delay before switching (time-programme switches providing a choice of time-intervals for executing more than one switching action H03K0017296000);;
H03K0017284000	in field-effect transistor switches
H03K0017288000	in tube switches
H03K0017292000	in thyristor, unijunction transistor or programmable unijunction transistor switches
H03K0017296000	Time-programme switches providing a choice of time-intervals for executing more than one switching action and automatically terminating their operation after the programme is completed (electronic clocks comprising means to be operated at preselected times or after preselected time-intervals G04G0015000000);;
H03K0017300000	Modifications for providing a predetermined threshold before switching (shaping pulses by thresholding H03K0005080000);;
H03K0017510000	characterised by the components used (H03K0017040000-H03K0017300000, H03K0017940000 take precedence);;
H03K0017520000	using gas-filled tubes
H03K0017540000	using vacuum tubes (using diodes H03K0017740000);;
H03K0017560000	using semiconductor devices (using diodes H03K0017740000);;
H03K0017580000	using tunnel diodes
H03K0017600000	using bipolar transistors
H03K0017620000	Switching arrangements with several input- or output-terminals (code converters H03M0005000000, H03M0007000000);;
H03K0017640000	having inductive loads
H03K0017660000	Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will
H03K0017680000	specially adapted for switching ac currents or voltages
H03K0017687000	using field-effect transistors
H03K0017693000	Switching arrangements with several input- or output-terminals (code converters H03M0005000000, H03M0007000000);;
H03K0017700000	having two electrodes and exhibiting negative resistance (using tunnel diodes H03K0017580000);;
H03K0017720000	having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
H03K0017725000	for ac voltages or currents (H03K0017735000 takes precedence);;
H03K0017730000	for dc voltages or currents (H03K0017735000 takes precedence);;
H03K0017735000	Switching arrangements with several input- or output-terminals
H03K0017740000	using diodes
H03K0017760000	Switching arrangements with several inputor output-terminals (code converters H03M0005000000, H03M0007000000);;
H03K0017780000	using electro-optical devices
H03K0017800000	using non-linear magnetic devices; using non-linear dielectric devices
H03K0017810000	Switching arrangements with several inputor output-terminals (code converters H03M0005000000, H03M0007000000);;
H03K0017820000	using transfluxors
H03K0017840000	using thin-film devices
H03K0017860000	using twistors
H03K0017880000	using beam-deflection tubes
H03K0017900000	using galvano-magnetic devices, e.g. Hall-effect devices (H03K0017950000, H03K0017970000 take precedence);;
H03K0017920000	using superconductive devices
H03K0017940000	characterised by the way in which the control signals are generated (mechanical structural details of control members of switches or keyboards, such as keys, push-buttons, levers or other mechanisms for transferring force to the activated elements, not directly producing electronic effects H01H;keyboards for special applications, see the relevant places, e.g. B41J, G06F0003023000, H04L0015000000, H04L0017000000, H04M0001000000)
H03K0017945000	Proximity switches (H03K0017960000 takes precedence);;
H03K0017950000	using a magnetic detector
H03K0017955000	using a capacitive detector
H03K0017960000	Touch switches
H03K0017965000	Switches controlled by moving an element forming part of the switch
H03K0017967000	having a plurality of control members, e.g. keyboard (H03K0017969000, H03K0017972000, H03K0017980000 take precedence);;
H03K0017968000	using opto-electronic devices
H03K0017969000	having a plurality of control members, e.g. keyboard
H03K0017970000	using a magnetic movable element
H03K0017972000	having a plurality of control members, e.g. keyboard
H03K0017975000	using a capacitive movable element
H03K0017980000	having a plurality of control members, e.g. keyboard
H03K0019000000	Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
H03K0019003000	Modifications for increasing the reliability
H03K0019007000	Fail-safe circuits
H03K0019010000	Modifications for accelerating switching
H03K0019013000	in bipolar transistor circuits
H03K0019017000	in field-effect transistor circuits
H03K0019020000	characterised by the components used (H03K0019003000-H03K0019017000;  take precedence);;
H03K0019040000	using gas-filled tubes
H03K0019060000	using vacuum tubes (using diode rectifiers H03K0019120000);;
H03K0019080000	using semiconductor devices (H03K0019173000 takes precedence;wherein the semiconductor devices are only diode rectifiers H03K0019120000)
H03K0019082000	using bipolar transistors
H03K0019084000	Diode; transistor logic
H03K0019086000	Emitter coupled logic
H03K0019088000	Transistor; transistor logic
H03K0019090000	Resistor; transistor logic
H03K0019091000	Integrated injection logic or merged transistor logic
H03K0019092000	Coupling arrangements; Interface arrangements
H03K0019094000	using field-effect transistors
H03K0019096000	Synchronous circuits, i.e. using clock signals
H03K0019098000	using thyristors
H03K0019100000	using tunnel diodes
H03K0019120000	using diode rectifiers
H03K0019140000	using electro-optical devices (optical logic elements per se G02F0003000000);;
H03K0019160000	using saturable magnetic devices
H03K0019162000	using parametrons
H03K0019164000	using ferro-resonant devices
H03K0019166000	using transfluxors
H03K0019168000	using thin-film devices
H03K0019170000	using twistors
H03K0019173000	using elementary logic circuits as components
H03K0019177000	arranged in matrix form
H03K0019180000	using galvano-magnetic devices, e.g. Hall-effect devices
H03K0019185000	using dielectric elements with variable dielectric constant, e.g. ferro-electric capacitors
H03K0019190000	using ferro-resonant devices
H03K0019195000	using superconductive devices
H03K0019200000	characterised by logic function, e.g. AND, OR, NOR, NOT circuits (H03K0019003000-H03K0019010000;  take precedence);;
H03K0019210000	EXCLUSIVE-OR circuits, i.e. giving output if input signal exists at only one input; COINCIDENCE circuits, i.e. giving output only if all input signals are identical
H03K0019230000	Majority or minority circuits, i.e. giving output having the state of the majority or the minority of the inputs
H03K0021000000	Details of pulse counters or frequency dividers
H03K0021020000	Input circuits
H03K0021080000	Output circuits
H03K0021100000	comprising logic circuits
H03K0021120000	with parallel read-out
H03K0021140000	with series read-out of number stored
H03K0021160000	Circuits for carrying-over pulses between successive decades
H03K0021170000	with field-effect transistors
H03K0021180000	Circuits for visual indication of the result
H03K0021200000	using glow-discharge lamps
H03K0021380000	Starting, stopping, or resetting the counter (counters with a base other than a power of two H03K0023480000, H03K0023660000);;
H03K0021400000	Monitoring; Error detection; Preventing or correcting improper counter operation
H03K0023000000	Pulse counters comprising counting chains; Frequency dividers comprising counting chains (H03K0029000000 takes precedence);;
H03K0023400000	Gating or clocking signals applied to all stages, i.e. synchronous counters
H03K0023420000	Out-of-phase gating or clocking signals applied to counter stages
H03K0023440000	using field-effect transistors
H03K0023460000	using charge transfer devices, i.e. bucket brigade or charge coupled devices
H03K0023480000	with a base or radix other than a power of two (H03K0023420000 takes precedence);;
H03K0023500000	using bi-stable regenerative trigger circuits (H03K0023420000-H03K0023480000;  take precedence);;
H03K0023520000	using field-effect transistors
H03K0023540000	Ring counters, i.e. feedback shift register counters (H03K0023520000 takes precedence);;
H03K0023560000	Reversible counters (H03K0023520000 takes precedence);;
H03K0023580000	Gating or clocking signals not applied to all stages, i.e. asynchronous counters (H03K0023740000-H03K0023840000;  take precedence);;
H03K0023600000	with field-effect transistors
H03K0023620000	reversible
H03K0023640000	with a base or radix other than a power of two (H03K0023400000-H03K0023620000;  take precedence);;
H03K0023660000	with a variable counting base, e.g. by presetting or by adding or suppressing pulses
H03K0023680000	with a base which is a non-integer
H03K0023700000	with a base which is an odd number (H03K0023660000 takes precedence);;
H03K0023720000	Decade counters (H03K0023660000 takes precedence);;
H03K0023740000	using relays
H03K0023760000	using magnetic cores or ferro-electric capacitors
H03K0023780000	using opto-electronic devices
H03K0023800000	using semiconductor devices having only two electrodes, e.g. tunnel diode, multi-layer diode
H03K0023820000	using gas-filled tubes
H03K0023840000	using thyristors or unijunction transistors
H03K0023860000	reversible (H03K0023400000-H03K0023840000;  take precedence);;
H03K0025000000	Pulse counters with step-by-step integration and static storage; Analogous frequency dividers
H03K0025020000	comprising charge storage, e.g. capacitor without polarisation hysteresis
H03K0025040000	using auxiliary pulse generator triggered by the incoming pulses
H03K0025120000	comprising hysteresis storage
H03K0027000000	Pulse counters in which pulses are continuously circulated in a closed loop; Analogous frequency dividers (feedback shift register counters H03K0023540000);;
H03K0029000000	Pulse counters comprising multi-stable elements, e.g. for ternary scale, for decimal scale; Analogous frequency dividers
H03K0029040000	Multi-cathode gas discharge tubes
H03K0029060000	Beam type tubes, e.g. magnetron, cathode ray tubes
H03L	AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES (of dynamo-electric generators H02P);;
H03L0001000000	Stabilisation of generator output against variations of physical values, e.g. power supply (automatic control H03L0005000000, H03L0007000000);;
H03L0001020000	against variations of temperature only
H03L0001040000	Constructional details for maintaining temperature constant
H03L0003000000	Starting of generators
H03L0005000000	Automatic control of voltage, current, or power
H03L0005020000	of power
H03L0007000000	Automatic control of frequency or phase; Synchronisation (tuning of resonant circuits in general H03J;synchronising in digital communication systems, see the relevant groups in class H04)
H03L0007020000	using a frequency discriminator comprising a passive frequency-determining element
H03L0007040000	wherein the frequency-determining element comprises distributed inductance and capacitance
H03L0007060000	using a reference signal applied to a frequency- or phase-locked loop
H03L0007080000	Details of the phase-locked loop
H03L0007100000	for assuring initial synchronisation or for broadening the capture range
H03L0007120000	using a scanning signal (tuning circuits with automatic scanning over a band of frequencies H03J0007180000);;
H03L0007140000	for assuring constant frequency when supply or correction voltages fail
H03L0007160000	Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
H03L0007180000	using a frequency divider or counter in the loop (H03L0007200000, H03L0007220000 take precedence);;
H03L0007200000	using a harmonic phase-locked loop, i.e. a loop which can be locked to one of a number of harmonically related frequencies applied to it (H03L0007220000 takes precedence);;
H03L0007220000	using more than one loop
H03L0007240000	using a reference signal directly applied to the generator
H03L0007260000	using energy levels of molecules, atoms, or subatomic particles as a frequency reference
H03M	CODING; DECODING OR CODE CONVERSION, IN GENERAL (using fluidic means F15C0004000000;optical analogue/digital converters G02F0007000000; coding, decoding or code conversion, specially adapted for particular applications, see the relevant subclasses, e.g. G01D, G01R, G06F, G09G, G10L, G11B, G11C, H04L, H04M, H04N; ciphering or deciphering for cryptography or other purposes involving the need for secrecy G09C)
H03M0001000000	Analogue/digital conversion; Digital/analogue conversion (conversion of analogue values to or from differential modulation H03M0003000000);;
H03M0001020000	Reversible analogue/digital converters
H03M0001040000	using stochastic techniques
H03M0001060000	Continuously compensating for, or preventing, undesired influence of physical parameters (periodically H03M0001100000);;
H03M0001080000	of noise
H03M0001100000	Calibration or testing
H03M0001120000	Analogue/digital converters (H03M0001020000-H03M0001100000;  take precedence);;
H03M0001140000	Conversion in steps with each step involving the same or a different conversion means and delivering more than one bit
H03M0001160000	with scale factor modification, i.e. by changing the amplification between the steps
H03M0001180000	Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging
H03M0001200000	Increasing resolution using an n bit system to obtain n + m bits, e.g. by dithering
H03M0001220000	pattern-reading type
H03M0001240000	using movable discs
H03M0001260000	with weighted coding, i.e. the weight given to a digit depends on the position of the digit within the block or code word, e.g. there is a given radix and the weights are powers of this radix
H03M0001280000	with non-weighted coding
H03M0001300000	incremental
H03M0001320000	using cathode-ray tubes
H03M0001340000	Analogue value compared with reference values (H03M0001480000 takes precedence);;
H03M0001360000	simultaneously only, i.e. parallel type
H03M0001380000	sequentially only, e.g. successive approximation type (converting more than one bit per step H03M0001140000);;
H03M0001400000	recirculation type
H03M0001420000	Sequential comparisons in series-connected stages with no change in value of analogue signal
H03M0001440000	Sequential comparisons in series-connected stages with change in value of analogue signal
H03M0001460000	with digital/analogue converter for supplying reference values to converter
H03M0001480000	Servo-type converters
H03M0001500000	with intermediate conversion to time interval (H03M0001640000 takes precedence);;
H03M0001520000	Input signal integrated with linear return to datum
H03M0001540000	Input signal sampled and held with linear return to datum
H03M0001560000	Input signal compared with linear ramp
H03M0001580000	Non-linear conversion
H03M0001600000	with intermediate conversion to frequency of pulses
H03M0001620000	Non-linear conversion
H03M0001640000	with intermediate conversion to phase of sinusoidal signals
H03M0001660000	Digital/analogue converters (H03M0001020000-H03M0001100000;  take precedence);;
H03M0001680000	with conversions of different sensitivity, i.e. one conversion relating to the more significant digital bits and another conversion to the less significant bits
H03M0001700000	Automatic control for modifying converter range
H03M0001720000	Sequential conversion in series-connected stages (H03M0001680000 takes precedence);;
H03M0001740000	Simultaneous conversion
H03M0001760000	using switching tree
H03M0001780000	using ladder network
H03M0001800000	using weighted impedances (H03M0001760000 takes precedence);;
H03M0001820000	with intermediate conversion to time interval
H03M0001840000	Non-linear conversion
H03M0001860000	with intermediate conversion to frequency of pulses
H03M0001880000	Non-linear conversion
H03M0003000000	Conversion of analogue values to or from differential modulation
H03M0003020000	Delta modulation, i.e. one-bit differential modulation
H03M0003040000	Differential modulation with several bits
H03M0005000000	Conversion of the form of the representation of individual digits
H03M0005020000	Conversion to or from representation by pulses
H03M0005040000	the pulses having two levels
H03M0005060000	Code representation, e.g. transition, for a given bit cell depending only on the information in that bit cell
H03M0005080000	Code representation by pulse width
H03M0005100000	Code representation by pulse frequency
H03M0005120000	Biphase level code, e.g. split phase code, Manchester code; Biphase space or mark code, e.g. double frequency code
H03M0005140000	Code representation, e.g. transition, for a given bit cell depending on the information in one or more adjacent bit cells, e.g. delay modulation code, double density code
H03M0005160000	the pulses having three levels
H03M0005180000	two levels being symmetrical with respect to the third level, i.e. balanced bipolar ternary code
H03M0005200000	the pulses having more than three levels
H03M0005220000	Conversion to or from representation by sinusoidal signals
H03M0007000000	Conversion of a code where information is represented by a given sequence or number of digits to a code where the same information is represented by a different sequence or number of digits
H03M0007020000	Conversion to or from weighted codes, i.e. the weight given to a digit depending on the position of the digit within the block or code word
H03M0007040000	the radix thereof being two
H03M0007060000	the radix thereof being a positive integer different from two
H03M0007080000	the radix being ten, i.e. pure decimal code
H03M0007100000	the radix thereof being negative
H03M0007120000	having two radices, e.g. binary-coded-decimal code
H03M0007140000	Conversion to or from non-weighted codes
H03M0007160000	Conversion to or from unit-distance codes, e.g. Gray code, reflected binary code
H03M0007180000	Conversion to or from residue codes
H03M0007200000	Conversion to or from n-out-of-m codes
H03M0007220000	to or from one-out-of-m codes
H03M0007240000	Conversion to or from floating-point codes
H03M0007260000	Conversion to or from stochastic codes
H03M0007280000	Programmable structures, i.e. where the code converter contains apparatus which is operator-changeable to modify the conversion process
H03M0007300000	Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
H03M0007320000	Conversion to or from delta modulation, i.e. one-bit differential modulation
H03M0007340000	adaptive
H03M0007360000	Conversion to or from differential modulation with several bits, i.e. the difference between successive samples being coded by more than one bit
H03M0007380000	adaptive
H03M0007400000	Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code
H03M0007420000	using table look-up for the coding or decoding process, e.g. using read-only memory
H03M0007440000	Suppression of irrelevant zeroes
H03M0007460000	Conversion to or from run-length codes, i.e. by representing the number of consecutive digits, or groups of digits, of the same kind by a code word and a digit indicative of that kind
H03M0007480000	alternating with other codes during the code conversion process, e.g. run-length coding being performed only as long as sufficiently long runs of digits of the same kind are present
H03M0007500000	Conversion to or from non-linear codes, e.g. companding
H03M0009000000	Parallel/series conversion or  vice versa(digital stores in which the information is moved stepwise per se G11C0019000000);;
H03M0011000000	Coding in connection with keyboards or like devices (keyboard switch arrangements, structural association of coders and keyboards H01H0013700000, H03K0017940000);;
H03M0013000000	Coding, decoding or code conversion, for error detection or error correction (error detection or error correction for analogue /digital, digital/analogue or code conversion H03M0001000000-H03M0011000000; specially adapted for digital computers G06F0011080000, for information storage based on relative movement between record carrier and transducer G11B, e.g. G11B0020180000, for static stores G11C)
H03M0013020000	using n-out-of-m codes
H03M0013120000	using convolutional codes
H03M0013220000	using interleaving techniques
H04	ELECTRIC COMMUNICATION TECHNIQUE
H04B	TRANSMISSION (coding, decoding or code conversion, in general H03M;broadcast communication H04H; multiplex systems H04J; secret communication H04K; transmission of digital information per se H04L)
H04B0001000000	Details of transmission systems, not covered by a single one of groups ; H04B0003000000-H04B0013000000; Details of transmission systems not characterised by the medium used for transmission (tuning resonant circuits H03J);;
H04B0001020000	Transmitters (spatial arrangements of component circuits in radio pills for living beings A61B0005070000);;
H04B0001030000	Constructional details, e.g. casings, housings
H04B0001034000	Portable transmitters
H04B0001036000	Cooling arrangements (cooling transformers H01F0027080000;cooling discharge tubes H01J0007240000, H01J0019740000)
H04B0001040000	Circuits (of television transmitters H04N0005380000);;
H04B0001060000	Receivers (control of amplification H03G;television receivers H04N0005440000, H04N0005640000)
H04B0001080000	Constructional details, e.g. cabinet
H04B0001100000	Means associated with receiver for limiting or suppressing noise or interference
H04B0001120000	Neutralising, balancing, or compensation arrangements
H04B0001140000	Automatic detuning arrangements
H04B0001160000	Circuits
H04B0001180000	Input circuits, e.g. for coupling to an aerial or a transmission line (input circuits for amplifiers in general H03F;coupling networks between aerials or lines and receivers independent of the nature of the receiver H03H)
H04B0001200000	for coupling gramophone pick-up, recorder output, or microphone to receiver
H04B0001220000	for receivers in which no local oscillation is generated
H04B0001240000	the receiver comprising at least one semiconductor device having three or more electrodes
H04B0001260000	for superheterodyne receivers (multiple frequency-changing H03D0007160000);;
H04B0001280000	the receiver comprising at least one semiconductor device having three or more electrodes
H04B0001300000	for homodyne or synchrodyne receivers (demodulator circuits H03D0001220000);;
H04B0001380000	Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
H04B0001400000	Circuits
H04B0001440000	Transmit/receive switching (tubes therefor H01J0017640000;waveguide switches per se H01P0001100000)
H04B0001460000	by voice-frequency signals; by pilot signals
H04B0001480000	in circuit for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter (in radar systems G01S);;
H04B0001500000	using different frequencies for the two directions of communication
H04B0001520000	Hybrid arrangements, i.e. for transition from single-path two-way transmission to single transmission on each of two paths, or ; vice versa
H04B0001540000	using the same frequency for both directions of communication (H04B0001440000 takes precedence);;
H04B0001560000	with provision for simultaneous communication in both directions
H04B0001580000	Hybrid arrangements, i.e. for transition from single-path two-way transmission to single transmission on each of two paths, or ; vice versa
H04B0001590000	Responders; Transponders (relay systems H04B0007140000);;
H04B0001600000	Supervising unattended repeaters
H04B0001620000	for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
H04B0001640000	Volume compression or expansion arrangements
H04B0001660000	for reducing bandwidth of signals (in pictorial communication systems H04N);;for improving efficiency of transmission (H04B0001680000 takes precedence);;
H04B0001680000	for wholly or partially suppressing the carrier or one side band
H04B0001720000	Circuits or components for simulating aerials, e.g. dummy aerial (dissipative waveguide terminations H01P0001260000);;
H04B0001740000	for increasing reliability, e.g. using redundant or spare channels or apparatus
H04B0001760000	Pilot transmitters or receivers for control of transmission or for equalising
H04B0003000000	Line transmission systems (combined with near-field transmission systems H04B0005000000;constructional features of cables H01B0011000000)
H04B0003020000	Details
H04B0003030000	Hybrid circuits (for transceivers H04B0001520000, H04B0001580000;hybrid junctions of the waveguide type H01P0005160000)
H04B0003040000	Control of transmission; Equalising (control of amplification in general H03G);;
H04B0003060000	by the transmitted signal
H04B0003080000	in negative-feedback path of line amplifier
H04B0003100000	by pilot signal
H04B0003110000	using pilot wire (H04B0003120000 take precedence);;
H04B0003120000	in negative-feedback path of line amplifier
H04B0003140000	characterised by the equalising network used
H04B0003160000	characterised by the negative-impedance network used
H04B0003180000	wherein the network comprises semiconductor devices
H04B0003200000	Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
H04B0003210000	using a set of bandfilters
H04B0003230000	using a replica of transmitted signal in the time domain, e.g. echo cancellers
H04B0003260000	Improving frequency characteristic by the use of loading coils (loading coils per se H01F0017080000);;
H04B0003280000	Reducing interference caused by currents induced in cable sheathing or armouring
H04B0003300000	Reducing interference caused by unbalance current in a normally balanced line
H04B0003320000	Reducing cross-talk, e.g. by compensating
H04B0003340000	by systematic interconnection of lengths of cable during laying; by addition of balancing components to cable during laying
H04B0003360000	Repeater circuits (H04B0003580000 takes precedence;amplifiers therefor H03F)
H04B0003380000	for signals in two different frequency ranges transmitted in opposite directions over the same transmission path
H04B0003400000	Artificial lines; Networks simulating a line of certain length
H04B0003420000	Circuits for by-passing of ringing signals
H04B0003440000	Arrangements for feeding power to a repeater along the transmission line
H04B0003460000	Monitoring; Testing
H04B0003480000	Testing attenuation
H04B0003500000	Systems for transmission between fixed stations via two-conductor transmission lines (H04B0003540000 takes precedence);;
H04B0003520000	Systems for transmission between fixed stations via waveguides
H04B0003540000	Systems for transmission via power distribution lines (remote indication of power network conditions, remote control of switching means in a power distribution network H02J0013000000);;
H04B0003560000	Circuits for coupling, blocking, or by-passing of signals
H04B0003580000	Repeater circuits (amplifiers therefor H03F);;
H04B0003600000	Systems for communication between relatively movable stations, e.g. for communication with lift (H04B0003540000 takes precedence);;
H04B0005000000	Near-field transmission systems, e.g. inductive loop type
H04B0005020000	using transceiver
H04B0005040000	Calling systems, e.g. paging system
H04B0005060000	using a portable transmitter associated with a microphone
H04B0007000000	Radio transmission systems, i.e. using radiation field (H04B0009000000, H04B0015000000 take precedence);;
H04B0007005000	Control of transmission; Equalising
H04B0007010000	Reducing phase shift
H04B0007015000	Reducing echo effects
H04B0007020000	Diversity systems (for direction finding G01S0003720000;aerial arrays or systems H01Q)
H04B0007040000	using a plurality of spaced independent aerials
H04B0007060000	at transmitting station
H04B0007080000	at receiving station
H04B0007100000	using a single aerial system characterised by its polarisation or directive properties, e.g. polarisation diversity, direction diversity
H04B0007120000	Frequency-diversity systems
H04B0007140000	Relay systems (interrogator-responder radar systems G01S0013740000);;
H04B0007145000	Passive relay systems
H04B0007150000	Active relay systems
H04B0007155000	Ground-based stations
H04B0007165000	employing angle modulation
H04B0007170000	employing pulse modulation, e.g. pulse code modulation
H04B0007185000	Space-based or airborne stations
H04B0007190000	Earth-synchronous stations
H04B0007195000	Non-synchronous stations
H04B0007220000	Scatter propagation systems
H04B0007240000	for communication between two or more posts
H04B0007260000	at least one of which is mobile
H04B0009000000	Transmission systems employing electromagnetic waves other than radio waves, e.g. light, infra-red (light guides per se G02B0006000000;devices or arrangements for the control, e.g. modulation, of light beams G02F0001000000; devices or arrangements for demodulating light, transferring the modulation or changing the frequency of light G02F0002000000)
H04B0011000000	Transmission systems employing ultranosic, sonic or infrasonic waves
H04B0013000000	Transmission systems characterised by the medium used for transmission, not provided for in groups ; H04B0003000000-H04B0011000000
H04B0013020000	Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy (line transmission systems with earth or water return H04B0003000000);;
H04B0014000000	Transmission systems not characterised by the medium used for transmission (details thereof H04B0001000000);;
H04B0014020000	characterised by the use of pulse modulation (in radio transmission relays H04B0007170000;transmission of digital information per se H04L)
H04B0014040000	using pulse code modulation (analogue/digital or digital /analogue conversion per se H03M0001000000);;
H04B0014060000	using differential modulation, e.g. delta modulation (conversion of analogue values to or from differential modulation per se H03M0003000000);;
H04B0014080000	characterised by the use of a sub-carrier
H04B0015000000	Suppression or limitation of noise or interference (by means associated with receiver H04B0001100000);;
H04B0015020000	Reducing interference from electric apparatus by means located at or near the interfering apparatus (structural association with dynamo-electric machines H02K0011000000);;
H04B0015040000	the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver, in a tape-recorder (reducing parasitic oscillations H03B, H03F;screening H05K0009000000)
H04B0015060000	by local oscillators of receivers
H04B0017000000	Monitoring; Testing
H04B0017020000	of relay systems
H04H	BROADCAST COMMUNICATION (transmission in general H04B;multiplex communication H04J)
H04H0001000000	Broadcast distribution systems
H04H0001020000	Wired systems
H04H0001040000	using carrier waves
H04H0001060000	having frequencies in two or more frequency bands, e.g. medium wave and VHF
H04H0001080000	combined with telephone network over which the broadcast is continuously available (telephone systems in general H04M);;
H04H0001100000	using signals not modulated on a carrier
H04H0001120000	not sharing the network with any other service
H04H0001140000	combined with power distribution network
H04H0003000000	Common-wave systems, i.e. using separate transmitters operating on substantially the same frequency
H04H0005000000	Stereophonic broadcast systems (multiplex systems in general H04J);;
H04H0007000000	Studio equipment (for television H04N);;Interconnection of studios
H04H0007020000	Mobile studios
H04H0007040000	Monitoring programmes
H04H0009000000	Recording the use made of the broadcast service
H04J	MULTIPLEX COMMUNICATION (transmission in general H04B;peculiar to transmission of digital information H04L0005000000; systems for transmitting television signals simultaneously or sequentially H04N0007080000; in exchanges H04Q0011000000; stereophonic systems H04S)
H04J0001000000	Frequency-division multiplex systems
H04J0001020000	Details
H04J0001040000	Frequency-transposition arrangements
H04J0001050000	using digital techniques
H04J0001060000	Arrangements for supplying the carrier waves
H04J0001080000	Arrangements for combining channels
H04J0001100000	Intermediate station arrangements, e.g. for branching, for tapping-off
H04J0001120000	Arrangements for reducing cross-talk between channels
H04J0001140000	Arrangements providing for calling or supervisory signals
H04J0001160000	Monitoring arrangements
H04J0001180000	in which all the carriers are amplitude-modulated (H04J0001020000 takes precedence);;
H04J0001200000	in which at least one carrier is angle-modulated (H04J0001020000 takes precedence);;
H04J0003000000	Time-division multiplex systems (relay systems H04B0007140000;selecting techniques H04Q)
H04J0003020000	Details (electronic switching or gating H03K0017000000);;
H04J0003040000	Distributors combined with modulators or demodulators
H04J0003060000	Synchronising arrangements
H04J0003070000	using pulse stuffing for systems with different or fluctuating information rates
H04J0003080000	Intermediate station arrangements, e.g. for branching, for tapping-off
H04J0003100000	Arrangements for reducing cross-talk between channels
H04J0003120000	Arrangements providing for calling or supervisory signals
H04J0003140000	Monitoring arrangements
H04J0003160000	in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted (H04J0003170000, H04J0003240000 take precedence);;
H04J0003170000	in which the transmission channel allotted to a first user may be taken away and re-allotted to a second user if the first user becomes inactive, e.g. TASI
H04J0003180000	using frequency compression and subsequent expansion of the individual signals
H04J0003200000	using resonant transfer
H04J0003220000	in which the sources have different rates or codes
H04J0003240000	in which the allocation is indicated by an address (H04J0003170000 takes precedence;in computers G06F0012000000, G06F0013000000)
H04J0003260000	in which the information and the address are simultaneously transmitted
H04J0004000000	Combined time-division and frequency-division multiplex systems (H04J0013000000 takes precedence);;
H04J0007000000	Multiplex systems in which the amplitudes or durations of the signals in individual channels are characteristic of those channels
H04J0007020000	in which the polarity of the amplitude is characteristic
H04J0009000000	Multiplex systems in which each channel is represented by a different type of modulation of the carrier
H04J0011000000	Orthogonal multiplex systems (H04J0013000000 takes precedence);;
H04J0013000000	Code multiplex systems
H04J0015000000	Multiplex systems not otherwise provided for
H04K	SECRET COMMUNICATION; JAMMING OF COMMUNICATION
H04K0001000000	Secret communication (systems with reduced bandwidth or suppressed carrier H04B0001660000;by using a sub-carrier H04B0014080000; by multiplexing H04J; transmission systems for secret digital information H04L0009000000; secret or subscription television systems H04N0007160000)
H04K0001020000	by adding a second signal to make the desired signal unintelligible
H04K0001040000	by frequency scrambling, i.e. by transposing or inverting parts of the frequency band or by inverting the whole band
H04K0001060000	by transmitting the information or elements thereof at unnatural speeds or in jumbled order or backwards
H04K0001080000	by varying the polarisation of transmitted waves
H04K0001100000	by using two signals transmitted simultaneously or successively
H04K0003000000	Jamming of communication; Counter-measures
H04L	TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (typewriters B41J;order telegraphs, fire or police telegraphs G08B; visual telegraphy G08B, G08C; teleautographic systems G08C; coding, decoding or code conversion, in general H03M; arrangements common to telegraphic and telephonic communication H04M; selecting H04Q)
H04L0001000000	Arrangements for detecting or preventing errors in the information received (correcting synchronisation H04L0007000000;arrangements in the transmission path H04B)
H04L0001020000	by diversity reception (in general H04B0007020000);;
H04L0001040000	using frequency diversity
H04L0001060000	using space diversity
H04L0001080000	by repeating transmission, e.g. Verdan system
H04L0001120000	by using return channel
H04L0001140000	in which the signals are sent back to the transmitter to be checked
H04L0001160000	in which the return channel carries supervisory signals, e.g. repetition request signals
H04L0001180000	Automatic repetition systems, e.g. van Duuren system
H04L0001200000	using signal-quality detector
H04L0001220000	using redundant apparatus to increase reliability
H04L0001240000	Testing correct operation
H04L0005000000	Arrangements affording multiple use of the transmission path (multiplex communication in general H04J);;
H04L0005020000	Channels characterised by the type of signal
H04L0005040000	the signals being represented by different amplitudes or polarities, e.g. quadriplex
H04L0005060000	the signals being represented by different frequencies (combined with time-division multiplexing H04L0005260000);;
H04L0005080000	each combination of signals in different channels being represented by a fixed frequency
H04L0005100000	with dynamo-electric generation of carriers; with mechanical filters or demodulators
H04L0005120000	the signals being represented by different phase modulations of a single carrier
H04L0005140000	Two-way operation using the same type of signal, i.e. duplex (conditioning for two-way transmission in general H04B0003200000);;
H04L0005160000	Half-duplex systems; Simplex/duplex switching; Transmission of break signals
H04L0005180000	Automatic changing of the traffic direction
H04L0005200000	using different combinations of lines, e.g. phantom working
H04L0005220000	using time-division multiplexing
H04L0005240000	with start-stop synchronous converters
H04L0005260000	combined with the use of different frequencies
H04L0007000000	Arrangements for synchronising receiver with transmitter
H04L0007020000	Speed or phase control by the received code signals, the signals containing no special synchronisation information
H04L0007040000	Speed or phase control by synchronisation signals
H04L0007060000	the synchronisation signals differing from the information signals in amplitude, polarity, or frequency
H04L0007080000	the synchronisation signals recurring cyclically
H04L0007100000	Arrangements for initial synchronisation
H04L0009000000	Arrangements for secret communication (in general H04K);;
H04L0009020000	by adding a key-signal to make the desired signal unintelligible
H04L0009040000	Arrangements for generating key-code characters
H04L0011000000	Exchanges; Connections between exchanges; Connections between exchanges and substations
H04L0011020000	Details
H04L0011040000	Switch-boards
H04L0011060000	Answer-back mechanisms or circuits
H04L0011080000	Monitoring arrangements
H04L0011100000	Allotting numbers to messages; Counting characters, words, or messages (counting in general G06M);;
H04L0011120000	Testing equipment; Routine testing
H04L0011140000	Current supply arrangements
H04L0011150000	Arrangements for remote connection or disconnection of substations or of equipment thereat
H04L0011160000	Party-line systems
H04L0011180000	Systems affording broadcast facilities; Systems affording conference facilities
H04L0011200000	Message switching systems (permutation-code selecting H04Q0003020000);;
H04L0011220000	Manual relay systems, e.g. push-button switching
H04L0011240000	with perforated tape storage
H04L0011260000	Arrangements for preventing the taking of data from a data transmission channel without authorisation
H04L0013000000	Details of the apparatus or circuits covered by groups ; H04L0015000000;  or H04L0017000000
H04L0013020000	Details not particular to receiver or transmitter
H04L0013040000	Driving mechanisms; Clutches (in general F16);;
H04L0013060000	Tape or page guiding or feeding devices
H04L0013080000	Intermediate storage means
H04L0013100000	Distributors
H04L0013120000	Non-mechanical distributors, e.g. relay distributors
H04L0013140000	Electronic distributors (in general H03K0017000000);;
H04L0013160000	of transmitters, e.g. code-bars, code-discs
H04L0013180000	of receivers
H04L0015000000	Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code (teaching apparatus therefor G09B;keyboard switches in general H01H0013700000, H03K0017940000; telegraph tapping keys H01H0021860000; coding in connection with keyboards or like devices, in general H03M0011000000)
H04L0015030000	Keys structurally combined with sound generators
H04L0015040000	Apparatus or circuits at the transmitting end
H04L0015060000	with a restricted number of keys, e.g. separate key for each type of code element
H04L0015080000	with a single key which transmits dots in one position and dashes in a second position
H04L0015100000	combined with perforating apparatus
H04L0015120000	with keyboard co-operating with code-bars
H04L0015140000	combined with perforating apparatus
H04L0015160000	with keyboard co-operating with code discs
H04L0015180000	Automatic transmitters, e.g. controlled by perforated tape
H04L0015200000	with optical sensing means
H04L0015220000	Apparatus or circuits for sending one or a restricted number of signals, e.g. distress signals
H04L0015240000	Apparatus or circuits at the receiving end
H04L0015260000	operating only on reception of predetermined code signals, e.g. distress signals, party-line call signals
H04L0015280000	Code reproducing apparatus
H04L0015300000	Writing recorders
H04L0015320000	Perforating recorders
H04L0015340000	Apparatus for recording received coded signals after translation, e.g. as type-characters
H04L0017000000	Apparatus or local circuits for transmitting or receiving codes wherein each character is represented by the same number of equal-length code elements, e.g. Baudot code (keyboard switches in general H01H0013700000, H03K0017940000;coding in connection with keyboards or like devices, in general H03M0011000000)
H04L0017020000	Apparatus or circuits at the transmitting end
H04L0017040000	with keyboard co-operating with code-bars
H04L0017060000	Contact operating means
H04L0017080000	combined with perforating apparatus
H04L0017100000	with keyboard co-operating with code-discs
H04L0017120000	Automatic transmitters, e.g. controlled by perforated tape
H04L0017140000	with optical sensing means
H04L0017160000	Apparatus or circuits at the receiving end
H04L0017180000	Code selection mechanisms
H04L0017200000	using perforating recorders
H04L0017220000	using mechanical translation and type-bar printing
H04L0017240000	using mechanical translation and type-head printing, e.g. type-wheel, type-cylinder
H04L0017260000	using aggregate motion translation
H04L0017280000	using pneumatic or hydraulic translation
H04L0017300000	using electric or electronic translation
H04L0019000000	Apparatus or local circuits for step-by-step systems
H04L0021000000	Apparatus or local circuits for mosaic printer telegraph systems
H04L0021020000	at the transmitting end
H04L0021040000	at the receiving end
H04L0023000000	Apparatus or local circuits for systems other than those covered by groups ; H04L0015000000-H04L0021000000
H04L0023020000	adapted for orthogonal signalling
H04L0025000000	Dc systems
H04L0025020000	Details (circuits in general for handling pulses H03K;in line transmission systems in general H04B0003020000)
H04L0025030000	Shaping networks in transmitter or receiver, e.g. adaptive shaping networks (impedance networks per se H03H);;
H04L0025040000	Passive shaping networks
H04L0025060000	Dc level restoring means; Bias distortion correction
H04L0025080000	Modifications for reducing interference; Modifications for reducing effects due to line faults
H04L0025100000	Compensating for variations in line balance
H04L0025120000	Compensating for variations in line impedance
H04L0025140000	Channel dividing arrangements
H04L0025170000	Interpolating arrangements
H04L0025180000	Arrangements for inductively generating telegraphic signals (induction coil interrupters H01H0051340000;dynamo-electric generators H02K)
H04L0025200000	Repeater circuits; Relay circuits
H04L0025220000	Repeaters for converting two wires to four wires (in general H04B);;Repeaters for converting single current to double current
H04L0025240000	Relay circuits using discharge tubes or semiconductor devices
H04L0025260000	Circuits with optical sensing means
H04L0025280000	Repeaters using modulation and subsequent demodulation
H04L0025300000	Non-synchronous systems
H04L0025320000	characterised by the code employed
H04L0025340000	using three or more different amplitudes, e.g. cable code
H04L0025360000	with electric or magnetic storage of the signals before transmitting or receiving to increase transmission speed
H04L0025380000	Synchronous or start-stop systems, e.g. for Baudot code
H04L0025400000	Transmitting circuits; Receiving circuits (repeater circuits, relay circuits H04L0025520000);;
H04L0025420000	using mechanical distributors
H04L0025440000	using relay distributors
H04L0025450000	using electronic distributors (electronic distributors in general H03K0017000000);;
H04L0025460000	using tuning forks or vibrating reeds
H04L0025480000	characterised by the code employed (H04L0025490000 takes precedence);;
H04L0025490000	using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels
H04L0025493000	by transition coding, i.e. the time-position or direction of a transition being encoded before transmission
H04L0025497000	by correlative coding, e.g. partial response coding or echo modulation coding
H04L0025500000	with electric or magnetic storage of the signals before transmitting or receiving to increase transmission speed
H04L0025520000	Repeater circuits; Relay circuits
H04L0025540000	using mechanical distributors
H04L0025560000	Non-electrical regenerative repeaters
H04L0025580000	using relay distributors
H04L0025600000	Regenerative repeaters with electromagnetic switches
H04L0025620000	using tuning forks or vibrating reeds
H04L0025640000	Start-stop regenerative repeaters using discharge tubes or semiconductor devices
H04L0025660000	Synchronous repeaters using discharge tubes or semiconductor devices
H04L0027000000	Ac systems
H04L0027020000	Amplitude-modulated carrier systems, e.g. using on/off keying; Single sideband or vestigial sideband modulation
H04L0027040000	Modulator circuits (in general H03C);;Transmitter circuits
H04L0027060000	Demodulator circuits (in general H03D);;Receiver circuits
H04L0027080000	Amplitude regulation arrangements
H04L0027100000	Frequency-modulated carrier systems, i.e. using frequency-shift keying
H04L0027120000	Modulator circuits (in general H03C);;Transmitter circuits
H04L0027140000	Demodulator circuits (in general H03D);;Receiver circuits
H04L0027160000	Frequency regulation arrangements
H04L0027180000	Phase-modulated carrier systems, i.e. using phase-shift keying
H04L0027200000	Modulator circuits (in general H03C);;Transmitter circuits
H04L0027220000	Demodulator circuits (in general H03D);;Receiver circuits
H04L0027240000	Half-wave signalling systems
H04L0027260000	Systems using multi-frequency codes
H04L0027280000	with simultaneous transmission of different frequencies each representing one code element
H04L0027300000	wherein each code element is represented by a combination of frequencies
H04M	TELEPHONIC COMMUNICATION (counting mechanisms G06M;circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08; reels or other take-up devices for cords H02G0011000000; multiplex transmission between switching centres H04J; selecting arrangements H04Q; transducers H04R)
H04M0001000000	Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges (prepayment telephone coin boxes H04M0017000000;current supply arrangements H04M0019000000; keyboard switches in general H01H0013700000, H03K0017940000)
H04M0001020000	Constructional features of telephone sets
H04M0001030000	Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets (transducers in general H04R0001000000);;
H04M0001040000	Supports for telephone transmitters or receivers (for transducers in general H04R0001000000);;
H04M0001050000	adapted for use on head, throat, or breast
H04M0001060000	Hooks; Cradles
H04M0001080000	associated with switches operated by weight of receiver or hand-set
H04M0001100000	associated with switches operated by magnetic effect due to proximity of receiver or hand-set
H04M0001110000	Supports for sets, e.g. incorporating armrests
H04M0001120000	Adjustable supports, e.g. extensible
H04M0001130000	pantographic
H04M0001140000	with resilient means to eliminate extraneous vibrations
H04M0001150000	Protection of telephone cord; Guiding telephone cord; Winding-up telephone cord (in general H02G0011000000);;
H04M0001170000	Hygienic or sanitary devices on telephone equipment (for mouthpieces or earpieces per se H04R0001120000);;
H04M0001180000	Telephone sets modified for use in ships, mines, or other places exposed to adverse environment (H04M0001190000 takes precedence;telephone cabinets per se E04H0001140000)
H04M0001190000	Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Special mouthpieces or receivers therefor (circuit arrangements for preventing eavesdropping H04M0001680000;telephone cabinets per se E04H0001140000)
H04M0001200000	Arrangements for preventing acoustic feedback (H04M0001620000 takes precedence);;
H04M0001210000	Combinations with auxiliary equipment, e.g. with clock, with memoranda pad
H04M0001220000	Illuminating; Arrangements for improving visibility of characters on dials
H04M0001230000	Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof (by improving visibility H04M0001220000);;
H04M0001240000	Arrangements for testing (measuring electric values G01R;testing transducers H04R0029000000)
H04M0001260000	Devices for calling a subscriber (coding in connection with keyboards or like devices, in general H03M0011000000);;
H04M0001270000	Devices whereby a plurality of signals may be stored simultaneously
H04M0001272000	with provision for storing only one subscriber number at a time, e.g. by keyboard or dial
H04M0001274000	with provision for storing more than one subscriber number at a time, e.g. using toothed disc
H04M0001276000	using magnetic recording, e.g. on tape
H04M0001278000	using punched cards or tapes
H04M0001300000	Devices which can set up and transmit only one digit at a time
H04M0001310000	by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
H04M0001315000	Clutches, spring assemblies, speed regulators, e.g. centrifugal brakes (H04M0001320000-H04M0001400000;  take precedence);;
H04M0001320000	Locking setting devices during transmission to prevent interference by user
H04M0001340000	Lost-motion or other arrangements for ensuring a pause between successive digit transmissions
H04M0001360000	Preventing the sending of predetermined numbers
H04M0001380000	Pulses transmitted by a movement variably limited by the setting of a stop
H04M0001400000	wherein the setting-operation short-circuits or open-circuits the transmitting mechanism during a variable part of a cycle
H04M0001500000	by generating or selecting currents of predetermined frequencies or combinations of frequencies
H04M0001515000	by generating or selecting other signals than trains of pulses of similar shape or other signals than currents of one or more different frequencies, e.g. generation of dc signals of alternating polarity, coded pulses, impedance dialling
H04M0001520000	Arrangements wherein a dial or equivalent is mechanically coupled to a line selector
H04M0001530000	Generation of additional signals, e.g. additional pulses
H04M0001540000	Arrangements wherein a dial or equivalent generates identifying signals, e.g. in party-line systems
H04M0001560000	Arrangements for indicating or recording the called number at the calling subscriber's set
H04M0001570000	Arrangements for indicating or recording the number of the calling subscriber at the called subscriber's set (at the operator set in a manual exchange H04M0005200000);;
H04M0001580000	Anti-side-tone circuits (hybrid circuits for carrier-frequency operation H04B0001000000);;
H04M0001600000	including speech amplifiers
H04M0001620000	Constructional arrangements
H04M0001640000	Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers (centralised dictation systems H04M0011100000);;
H04M0001650000	Automatic arrangements for recording messages for absent subscribers
H04M0001660000	with means for preventing unauthorised or fraudulent calling
H04M0001680000	Circuit arrangements for preventing eavesdropping
H04M0001700000	Lock-out or secrecy arrangements in party-line systems
H04M0001720000	Substation extension arrangements
H04M0001740000	with means for reducing interference; with means for reducing effects due to line faults
H04M0001760000	Compensating for differences in line impedance (in general H04B);;
H04M0001780000	Circuit arrangements in which low-frequency speech signals proceed in one direction on the line, while speech signals proceeding in the other direction on the line are modulated on a high-frequency carrier signal (repeater circuits H04B0003380000);;
H04M0003000000	Automatic or semi-automatic exchanges
H04M0003020000	Ringing or otherwise calling substations (selective calling H04Q);;
H04M0003040000	calling signal supplied from final selector
H04M0003060000	calling signal supplied from subscriber's line circuit
H04M0003080000	Indicating faults in circuits or apparatus
H04M0003100000	providing fault- or trouble-signals
H04M0003120000	Marking faulty circuits "busy"; Enabling equipment to disengage itself from faulty circuits
H04M0003140000	Signalling existence of persistent "off-hook" condition
H04M0003160000	with lock-out or secrecy provision in party-line systems
H04M0003180000	with means for reducing interference; with means for reducing effects due to line faults
H04M0003200000	with means for interrupting existing connections; with means for breaking-in on conversations
H04M0003220000	Supervisory, monitoring, or testing arrangements
H04M0003240000	with provision for checking the normal operation
H04M0003260000	with means for applying test signals
H04M0003280000	Automatic routine testing
H04M0003300000	for subscribers' lines
H04M0003320000	for lines between exchanges
H04M0003340000	Testing for cross-talk (in lines generally H04B);;
H04M0003360000	Statistical metering, e.g. recording occasions when traffic exceeds capacity of trunks (digital computers for evaluating statistical data G06F0015360000);;
H04M0003380000	Graded-service arrangements, i.e. some subscribers prevented from establishing certain connections (queueing arrangements H04Q0003640000);;
H04M0003400000	Applications of speech amplifiers
H04M0003420000	Systems providing special services to subscribers
H04M0003440000	Additional connecting arrangements for providing access to frequently-wanted subscribers
H04M0003460000	Arrangements for calling a number of substations in a predetermined sequence until an answer is obtained
H04M0003480000	Arrangements for recalling a calling subscriber when the wanted subscriber ceases to be busy
H04M0003500000	Centralised arrangements for answering calls; Centralised arrangements for recording messages for absent subscribers (centralised dictation systems H04M0011100000);;
H04M0003520000	Arrangements for routing dead-number calls to operators
H04M0003540000	Arrangements for diverting calls for one subscriber to another predetermined subscriber
H04M0003560000	Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
H04M0003580000	Arrangements for transferring received calls from one subscriber to another; Arrangements affording interim conversations between either the calling or the called party and a third party
H04M0003600000	Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
H04M0003620000	Keyboard equipment
H04M0003640000	Arrangements for signalling the number or class of the calling line to the operator (between operators in inter-exchange working H04M0005180000);;
H04M0005000000	Manual exchanges (substation equipment in general H04M0001000000);;
H04M0005020000	Constructional details (jacks, jack-plugs H01R0017000000, H01R0021000000);;
H04M0005040000	Arrangements for indicating calls or supervising connections for calling or clearing
H04M0005060000	affording automatic call distribution
H04M0005080000	using connecting means other than cords
H04M0005100000	using separate plug for each subscriber
H04M0005120000	Ringing or otherwise calling substations
H04M0005140000	Applications of speech amplifiers
H04M0005160000	with means for reducing interference; with means for reducing effects due to line faults
H04M0005180000	Arrangements for signalling the class or number of called or calling line from one exchange to another
H04M0005200000	Number-indicating arrangements for incoming lines
H04M0007000000	Interconnection arrangements between switching centres (transmission arrangements in general H04B);;
H04M0007020000	modified to compensate for differences of ground potential
H04M0007040000	modified to compensate for differences of line impedance
H04M0007060000	using auxiliary connections for control or supervision
H04M0007080000	adapted for phantom working
H04M0007100000	adapted for two-way working, i.e. calls may be set-up in either direction over the same connection
H04M0007120000	adapted for working between exchanges having different types of switching equipment, e.g. power-driven and step by step, decimal and non-decimal
H04M0007140000	in systems involving main and subordinate switching centres (current supply source at subordinate switching centre charged from main exchange H04M0019060000);;
H04M0007160000	in systems employing carrier frequencies
H04M0009000000	Interconnection arrangements not involving centralised switching
H04M0009020000	involving a common line for all parties
H04M0009040000	involving a separate line for each pair of parties
H04M0009060000	involving combinations of interconnecting lines
H04M0009080000	Two-way loud-speaking telephone systems with means for suppressing echoes or otherwise conditioning for one or other direction of traffic (for line transmission in general H04B0003200000);;
H04M0009100000	with switching of direction of transmission by voice frequency
H04M0011000000	Telephonic communication systems adapted for combination with other electrical systems
H04M0011020000	with bell or annunciator systems (such systems in general G08);;
H04M0011040000	with fire, police, burglar, or other alarm systems (such systems in general G08);;
H04M0011060000	Simultaneous speech and telegraphic or other data transmission over the same conductors (transmission of digital information in general H04L);;
H04M0011080000	adapted for optional reception of entertainment or informative matter (systems in which the information is continuously available on a carrier over the whole network H04H0001080000);;
H04M0011100000	with dictation recording and playback systems (such systems in general G11B);;
H04M0013000000	Party-line systems (substation equipment H04M0001000000;exchange equipment H04M0003000000, H04M0005000000; metering arrangements H04M0015360000)
H04M0015000000	Metering arrangements; Time-controlling arrangements; Time-indicating arrangements (counters per se G06M, H03K);;
H04M0015020000	Severing connection after predetermined time
H04M0015040000	Recording calls in printed, perforated, or other permanent form
H04M0015060000	Recording class or number of calling or of called party
H04M0015080000	Metering calls to called party
H04M0015100000	Metering calls from calling party
H04M0015120000	Discriminative metering
H04M0015140000	according to class of calling party
H04M0015160000	according to connection obtained
H04M0015180000	according to duration of call
H04M0015200000	Operator's time recording or indicating arrangements
H04M0015220000	according to time of day
H04M0015240000	preventing metering of tax-free calls to certain lines, e.g. to fire or ambulance stations
H04M0015260000	Meter at exchange controlled by operator
H04M0015280000	with meter at substation
H04M0015300000	Meter not controlled from exchange
H04M0015320000	Metering arrangements for satellites or concentrators which connect one or more exchange lines with a group of local lines
H04M0015340000	Metering arrangements for private branch exchanges
H04M0015360000	Metering arrangements for party-lines
H04M0015380000	Metering by apparatus not of the mechanical step-by-step counter type
H04M0017000000	Prepayment telephone systems
H04M0017020000	Coin-freed or check-freed systems (coin-freed or check-freed apparatus per se G07F);;
H04M0019000000	Current supply arrangements for telephone systems (for selecting equipment H04Q0001280000);;
H04M0019020000	providing ringing current or supervisory tones, e.g. dialling tone, busy tone
H04M0019040000	Ringing-current generated at substation
H04M0019060000	Current supply source at subordinate switching centre charged from main exchange
H04M0019080000	Current supply source at substation (generating ringing current H04M0019040000);;
H04N	PICTORIAL COMMUNICATION, e.g. TELEVISION (measuring, testing G01;systems for autographic writing, e.g. writing telegraphy, which involve following an outline G08; information storage based on relative movement between record carrier and transducer G11B; coding, decoding or code conversion, in general H03M; broadcast distribution or the recording of use made thereof H04H)
H04N0001000000	Transmission or reproduction of pictures or patterns not varying in time, e.g. facsimile transmission
H04N0001024000	Details of scanning heads
H04N0001028000	for picture-information pick-up
H04N0001032000	for picture-information reproducing
H04N0001036000	for optical reproducing
H04N0001040000	Scanning arrangements (H04N0001387000 takes precedence);;
H04N0001060000	using cylindrical picture-bearing surfaces
H04N0001080000	Mechanisms for mounting or holding the sheet around the drum
H04N0001100000	using flat picture-bearing surfaces
H04N0001120000	using the sheet-feed movement as the slow scanning component
H04N0001140000	using a rotating endless belt carrying the scanning heads
H04N0001160000	using a rotating helical element
H04N0001170000	the scanning speed being dependent on content of picture
H04N0001180000	arranged for simultaneous transmission of separate parts of one picture
H04N0001200000	arranged for simultaneous transmission of two or more separate pictures
H04N0001210000	Intermediate information storage (H04N0001387000, H04N0001410000 take precedence;information storage in general G11)
H04N0001230000	Reproducing arrangements (details of scanning heads H04N0001024000;scanning arrangements therefor H04N0001040000)
H04N0001270000	Involving production of a magnetic intermediate picture
H04N0001290000	Involving production of an electrostatic intermediate picture
H04N0001310000	Mechanical arrangements for picture transmission, e.g. adaptation of clutches, gearing, gear transmissions
H04N0001320000	Circuits or arrangements for control or supervision between transmitter and receiver
H04N0001340000	for coin-freed systems
H04N0001360000	for synchronising or phasing transmitter and receiver
H04N0001380000	Circuits or arrangements for blanking or otherwise eliminating unwanted parts of pictures (H04N0001387000 takes precedence);;
H04N0001387000	Composing, repositioning or otherwise modifying originals (photoelectronic composing of characters B41B0019000000);;
H04N0001393000	Enlarging or reducing
H04N0001400000	Picture signal circuits (H04N0001387000 takes precedence);;
H04N0001410000	Bandwidth or redundancy reduction (by scanning H04N0001170000);;
H04N0001411000	for the transmission or reproduction of two-tone pictures, e.g. black and white pictures
H04N0001413000	Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information
H04N0001415000	in which the picture-elements are subdivided or grouped into fixed one-dimensional or two-dimensional blocks
H04N0001417000	using predictive or differential encoding
H04N0001419000	in which encoding of the length of a succession of picture-elements of the same value along a scanning line is the only encoding step
H04N0001420000	Systems for two-way working
H04N0001440000	Secrecy systems
H04N0001460000	Colour picture communication systems
H04N0003000000	Scanning details of television systems; Combination thereof with generation of supply voltages
H04N0003020000	by optical-mechanical means only (H04N0003360000 takes precedence;optical scanning systems in general G02B0026100000)
H04N0003040000	having a moving aperture
H04N0003060000	having a moving lens or other refractor
H04N0003080000	having a moving reflector
H04N0003090000	for electromagnetic radiation in the invisible region, e.g. infra-red
H04N0003100000	by means not exclusively optical-mechanical (H04N0003360000 takes precedence;devices or arrangements for the electro-, magneto- or acousto-optical modulation or deflection of light beams G02F)
H04N0003120000	by switched stationary formation of lamps, photocells, or light relays
H04N0003140000	by means of electrically scanned solid-state devices
H04N0003150000	for picture signal generation
H04N0003160000	by deflecting electron beam in cathode-ray tube (producing sawtooth waveforms H03K0004000000);;
H04N0003180000	Generation of supply voltages, in combination with electron beam deflecting
H04N0003185000	Maintaining dc voltage constant (regulation of dc voltage in general G05F);;
H04N0003190000	Arrangements or assemblies in supply circuits for the purpose of withstanding high voltages
H04N0003195000	Flyback transformers; Constructional details thereof
H04N0003200000	Prevention of damage to cathode-ray tubes in event of failure of scanning
H04N0003220000	Circuits for controlling dimensions, shape or centering of picture on screen
H04N0003223000	Controlling dimensions (by maintaining the cathode-ray tube high voltage constant H04N0003185000);;
H04N0003227000	Centering
H04N0003230000	Distortion correction, e.g. for pincushion distortion correction, S-correction
H04N0003233000	using active elements
H04N0003237000	using passive elements
H04N0003240000	Blanking circuits
H04N0003260000	Modifications of scanning arrangements to improve focusing (focusing circuits in general H01J);;
H04N0003270000	Circuits special to multi-standard receivers (circuitry of multi-standard receivers in general H04N0005460000);;
H04N0003280000	producing multiple scanning, i.e. using more than one spot at the same time
H04N0003300000	otherwise than with constant velocity or otherwise than in pattern formed by unidirectional, straight, substantially horizontal or vertical lines
H04N0003320000	Velocity varied in dependence upon picture information
H04N0003340000	Elemental scanning area oscillated rapidly in direction transverse to main scanning direction
H04N0003360000	Scanning of motion picture films, e.g. for telecine
H04N0003380000	with continuously moving film
H04N0003400000	with intermittently moving film
H04N0005000000	Details of television systems (scanning details or combination thereof with generation of supply voltages H04N0003000000;details specific to colour television H04N0009000000)
H04N0005040000	Synchronising (for television systems using pulse code modulation H04N0007130000;in general H03L0007000000)
H04N0005050000	Synchronising circuits with arrangements for extending range of synchronisation, e.g. by using switching between several time constants
H04N0005060000	Generation of synchronising signals
H04N0005067000	Arrangements or circuits at the transmitter end
H04N0005073000	for mutually locking plural sources of synchronising signals, e.g. studios or relay stations
H04N0005080000	Separation of synchronising signals from picture signals
H04N0005100000	Separation of line synchronising signal from frame synchronising signal
H04N0005120000	Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising
H04N0005140000	Picture signal circuitry for video frequency region (H04N0005222000 takes precedence);;
H04N0005160000	Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level
H04N0005180000	by means of "clamp" circuit operated by switching circuit
H04N0005200000	Circuitry for controlling amplitude response
H04N0005202000	Gamma control
H04N0005205000	for correcting amplitude versus frequency characteristic
H04N0005208000	for compensating for attenuation of high frequency components, e.g. crispening, aperture distortion correction
H04N0005210000	Circuitry for suppressing or minimising disturbance, e.g. moire, halo
H04N0005213000	Circuitry for suppressing or minimising impulsive noise (H04N0005217000 takes precedence);;
H04N0005217000	in picture signal generation
H04N0005222000	Studio circuitry; Studio devices; Studio equipment
H04N0005225000	Television cameras
H04N0005228000	Circuit details for pick-up tubes
H04N0005232000	Devices for controlling television cameras, e.g. remote control (H04N0005235000 takes precedence;focusing for cameras G03B0003000000; varying magnification for cameras G03B0005000000; control of exposure for cameras G03B0007000000)
H04N0005235000	Circuitry for compensating for variation in the brightness of the object
H04N0005238000	by influencing optical part of the camera
H04N0005243000	by influencing the picture signal
H04N0005247000	Arrangement of television cameras
H04N0005253000	Picture signal generating by scanning motion picture films or slide opaques, e.g. for telecine (scanning details therefor H04N0003360000);;
H04N0005257000	Picture signal generators using flying-spot scanners (H04N0005253000 takes precedence);;
H04N0005262000	Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects
H04N0005265000	Mixing
H04N0005268000	Signal distribution or switching (for broadcasting H04H0001000000);;
H04N0005272000	Means for inserting a foreground image in a background image, i.e. inlay, outlay
H04N0005275000	Generation of keying signals
H04N0005278000	Subtitling
H04N0005280000	Mobile studios
H04N0005300000	Transforming light or analogous information into electric information (H04N0005222000 takes precedence;scanning details H04N0003000000; light transforming elements H01J, H01L)
H04N0005310000	Transforming ultrasonic, sonic or infrasonic radiation
H04N0005320000	Transforming X-rays
H04N0005330000	Transforming infra-red radiation
H04N0005335000	using electrically scanned solid-state devices (H04N0005320000, H04N0005330000 take precedence);;
H04N0005380000	Transmitter circuitry (H04N0005140000 takes precedence);;
H04N0005400000	Modulation circuits
H04N0005420000	for transmitting at will black-and-white or colour signals
H04N0005440000	Receiver circuitry (H04N0005140000 takes precedence);;
H04N0005445000	for displaying additional information (H04N0005500000 takes precedence);;
H04N0005450000	Picture in picture
H04N0005455000	Demodulation-circuits (demodulation in general H03D);;
H04N0005460000	for receiving on more than one standard at will (deflecting circuits of multi-standard receivers H04N0003270000);;
H04N0005500000	Tuning indicators; Automatic tuning control (tuners per se H03J);;
H04N0005520000	Automatic gain control
H04N0005530000	Keyed automatic gain control
H04N0005540000	for positively-modulated picture signals (H04N0005530000 takes precedence);;
H04N0005560000	for negatively-modulated picture signals (H04N0005530000 takes precedence);;
H04N0005570000	Control of contrast or brightness
H04N0005580000	in dependance upon ambient light
H04N0005590000	in dependance upon beam current of cathode ray tube
H04N0005600000	for the sound signals
H04N0005620000	Intercarrier circuits, i.e. heterodyning sound and vision carriers
H04N0005630000	Generation or supply of power specially adapted for television receivers (generation of supply voltages in combination with electron beam deflecting H04N0003180000;regulating of voltage or current in general G05F; transformers H01F; supplying or distributing electric power, in general H02J; static converters H02M)
H04N0005640000	Constructional details of receivers, e.g. cabinets, dust covers (furniture aspects A47B, e.g. A47B0081060000);;
H04N0005645000	Mounting of picture tube on chassis or in housing
H04N0005650000	Holding-devices for protective discs or for picture masks
H04N0005655000	Construction or mounting of chassis, e.g. for varying the elevation of the tube
H04N0005660000	Transforming electric information into light information (scanning details H04N0003000000);;
H04N0005680000	Circuit details for cathode-ray display tubes
H04N0005700000	Circuit details for electroluminescent devices
H04N0005720000	Modifying the appearance of television pictures by optical filters or diffusing screens (optical filters or diffusing screens per se G02B0005000000);;
H04N0005740000	Projection arrangements for image reproduction, e.g. using eidophor (optical systems in general G02B);;
H04N0005760000	Television signal recording (diagnosis, testing or measuring of television signal recorders H04N0017060000;recording in connection with measuring G01D; information storage in general G11, e.g. G11B)
H04N0005780000	using magnetic recording (H04N0005910000 takes precedence);;
H04N0005781000	on discs or drums
H04N0005782000	on tape
H04N0005783000	Adaptations for reproducing at a rate different from the recording rate
H04N0005800000	using electrostatic recording (H04N0005910000 takes precedence);;
H04N0005820000	using deformable thermoplastic recording medium
H04N0005830000	on discs or drums
H04N0005840000	using optical recording (H04N0005800000, H04N0005890000, H04N0005910000 take precedence);;
H04N0005850000	on discs or drums
H04N0005870000	Producing a motion picture film from a television signal (scanning of motion picture films for television signal generation H04N0003360000;television signal generation by scanning a motion picture film H04N0005253000, H04N0009110000)
H04N0005890000	using holographic recording (H04N0005910000 take precedence);;
H04N0005900000	on discs or drums
H04N0005903000	using variable electrical capacitive recording (H04N0005910000 takes precedence);;
H04N0005907000	using static stores, e.g. storage tubes, semiconductor memories (H04N0005910000 takes precedence;based on relative movement between record carrier and transducer H04N0005780000-H04N0005903000)
H04N0005910000	Television signal processing therefor (of colour signals H04;N;9/491);;
H04N0005920000	Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
H04N0005930000	Regeneration of the television signal or of selected parts thereof, e.g. synchronisation signal processing
H04N0005940000	Signal drop-out compensation
H04N0005950000	Time-base error compensation
H04N0007000000	Television systems (details H04N0003000000, H04N0005000000;systems specific to colour television H04N0011000000; stereoscopic television systems H04N0013000000, H04N0015000000)
H04N0007010000	Conversion of standards
H04N0007040000	Systems for the transmission of one television signal, i.e. both picture and sound, by a single carrier (H04N0007087000, H04N0007093000 take precedence);;
H04N0007060000	Systems for the simultaneous transmission of one television signal, i.e. both picture and sound, by more than one carrier (H04N0007087000, H04N0007093000 take precedence);;
H04N0007080000	Systems for the transmission of more signals than one television signal, e.g. additional information signals, simultaneously or sequentially, the signals occupying wholly or partially the same frequency band (H04N0007087000, H04N0007093000 take precedence);;
H04N0007087000	Systems with signal insertion during the vertical blanking interval
H04N0007093000	Systems with signal insertion during the horizontal blanking interval
H04N0007100000	Adaptations for transmission by electrical cable (H04N0007120000 takes precedence);;
H04N0007120000	Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal (H04N0007130000 takes precedence;by special scanning H04N0003000000)
H04N0007130000	Systems for the transmission of television signals using pulse code modulation
H04N0007133000	involving transform coding
H04N0007137000	involving predictive coding
H04N0007140000	Systems for two-way working (H04N0007173000 takes precedence);;
H04N0007160000	Secrecy systems; Subscription systems
H04N0007167000	Systems rendering the television signal unintelligible and subsequently intelligible
H04N0007173000	with two-way working, e.g. subscriber sending a programme selection signal
H04N0007180000	Closed-circuit television systems, i.e. systems in which the signal is not broadcast
H04N0007200000	Adaptations for transmission via a GHz frequency band, e.g. via satellite
H04N0007220000	Adaptations for optical transmission
H04N0009000000	Details of colour television systems
H04N0009040000	Picture signal generators
H04N0009070000	with one pick-up device only
H04N0009077000	whereby the colour signals are characterised by their phase
H04N0009083000	whereby the colour signals are characterised by their frequency
H04N0009090000	with more than one pick-up device
H04N0009093000	Systems for avoiding or correcting misregistration of video signals
H04N0009097000	Optical arrangements associated therewith, e.g. for beam-splitting, for colour correction (beam-splitting per se G02B0027100000);;
H04N0009100000	using optical-mechanical scanning means only (H04N0009110000 takes precedence;optical scanning systems in general G02B0026100000)
H04N0009110000	Scanning of colour motion picture films, e.g. for telecine
H04N0009120000	Picture reproducers (devices or arrangements for the electro-, magneto- or acousto-optical modulation or deflection of light beams G02F);;
H04N0009140000	using optical-mechanical scanning means only (H04N0009110000 takes precedence;optical scanning systems in general G02B0026100000)
H04N0009160000	using cathode ray tubes (H04N0009110000 takes precedence;cathode-ray tubes H01J0031000000)
H04N0009180000	using separate electron beams for the primary colour signals (H04N0009270000 takes precedence);;
H04N0009200000	with more than one beam in a tube
H04N0009220000	using the same beam for more than one primary colour information (H04N0009270000 takes precedence);;
H04N0009240000	using means, integral with, or external to, the tube, for producing signal indicating instantaneous beam position
H04N0009260000	using electron-optical colour selection means, e.g. line grid, deflection means in or near the gun or near the phosphor screen
H04N0009270000	with variable depth of penetration of electron beam into the luminescent layer, e.g. penetrons
H04N0009280000	Arrangements for convergence or focusing
H04N0009285000	using quadrupole lenses (quadrupole lenses per se G21K0001080000, H01J0003140000, H01J0029580000, H01J0037100000);;
H04N0009290000	using demagnetisation or compensation of external magnetic fields
H04N0009300000	using solid-state colour display devices
H04N0009310000	Projection devices for colour picture display
H04N0009430000	Conversion of monochrome picture signals to colour picture signals for colour picture display
H04N0009440000	Colour synchronisation
H04N0009450000	Generation or recovery of colour sub-carriers
H04N0009455000	Generation of colour burst signals; Insertion of colour burst signals in colour picture signals or separation of colour burst signals from colour picture signals (H04N0009450000 takes precedence);;
H04N0009465000	Synchronisation of the PAL-switch
H04N0009470000	for sequential signals
H04N0009475000	for mutually locking different synchronisation sources
H04N0009640000	Circuits for processing colour signals (H04N0009770000 takes precedence);;
H04N0009650000	for synchronous modulators
H04N0009660000	for synchronous demodulators
H04N0009670000	for matrixing
H04N0009680000	for controlling the amplitude of colour signals, e.g. automatic chroma control circuits (H04N0009710000, H04N0009730000 take precedence);;
H04N0009690000	for modifying the colour signals by gamma correction
H04N0009700000	for colour killing
H04N0009710000	combined with colour gain control
H04N0009720000	for reinsertion of dc and slowly varying components of colour signals
H04N0009730000	colour balance circuits, e.g. white balance circuits, colour temperature control
H04N0009740000	for obtaining special effects (H04N0009650000-H04N0009730000;  take precedence);;
H04N0009750000	Chroma key
H04N0009760000	for mixing of colour signals (H04N0009750000 takes precedence);;
H04N0009770000	Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase (circuits for matrixing H04N0009670000);;
H04N0009780000	for separating the brightness signal or the chrominance signal from the colour television signal, e.g. using comb filter
H04N0009790000	Processing of colour television signals in connection with recording
H04N0009800000	Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
H04N0009810000	the individual colour picture signal components being recorded sequentially only
H04N0009820000	the individual colour picture signal components being recorded simultaneously only
H04N0009830000	the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal
H04N0009840000	the recorded signal showing a feature, which is different in adjacent track parts, e.g. different phase or frequency
H04N0009850000	the recorded brightness signal occupying a frequency band totally overlapping the frequency band of the recorded chrominance signal, e.g. frequency interleaving
H04N0009860000	the individual colour picture signal components being recorded sequentially and simultaneously, e.g. corresponding to SECAM-system
H04N0009870000	Regeneration of colour television signals (H04N0009800000 takes precedence);;
H04N0009880000	Signal drop-out compensation
H04N0009890000	Time-base error compensation
H04N0011000000	Colour television systems (details H04N0009000000;stereoscopic H04N0015000000)
H04N0011020000	with bandwidth reduction (H04N0011040000 takes precedence);;
H04N0011040000	using pulse code modulation
H04N0011060000	Transmission systems characterised by the manner in which the individual colour picture signal components are combined
H04N0011080000	using sequential signals only (dot sequential systems H04N0011120000);;
H04N0011100000	in which colour signals are inserted in the blanking interval of brightness signal
H04N0011120000	using simultaneous signals only
H04N0011140000	in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system
H04N0011160000	the chrominance signal alternating in phase, e.g. PAL-system
H04N0011180000	using simultaneous and sequential signals, e.g. SECAM-system
H04N0011200000	Conversion of the manner in which the individual colour picture signal components are combined, e.g. conversion of colour television standards
H04N0011220000	in which simultaneous signals are converted into sequential signals or ; vice versa
H04N0013000000	Stereoscopic television systems; Details thereof (H04N0015000000 takes precedence);;
H04N0013020000	Picture signal generators
H04N0013040000	Picture reproducers
H04N0015000000	Stereoscopic colour television systems; Details thereof
H04N0017000000	Diagnosis, testing or measuring for television systems or their details
H04N0017020000	for colour television signals
H04N0017040000	for receivers
H04N0017060000	for recorders
H04Q	SELECTING (switches, relays, selectors H01H;electronic switches H03K0017000000)
H04Q0001000000	Details of selecting apparatus or arrangements (details of selector switches H01H0063000000);;
H04Q0001020000	Constructional details
H04Q0001040000	Frames or mounting racks for selector switches; Accessories therefor, e.g. frame cover
H04Q0001060000	Cable ducts or mountings specially adapted for exchange installations (in general H02G);;
H04Q0001080000	Frames or mounting racks for relays; Accessories therefor
H04Q0001100000	Exchange station construction
H04Q0001120000	Arrangements of multiple bars with or without pivotable frames
H04Q0001140000	Distribution frames
H04Q0001160000	Wiring arrangements for selector switches or relays in frames
H04Q0001180000	Electrical details
H04Q0001200000	Testing circuits or apparatus; Circuits or apparatus for detecting, indicating, or signalling faults or troubles
H04Q0001220000	Automatic arrangements
H04Q0001240000	for connection devices
H04Q0001260000	for signalling trouble in unoccupied sub-exchanges
H04Q0001280000	Current-supply circuits or arrangements for selection equipment at exchanges
H04Q0001300000	Signalling arrangements; Manipulation of signalling currents (multiplex systems providing for calling or supervisory signals H04J0001140000, H04J0003120000;telephone substation equipment H04M0001000000)
H04Q0001320000	using trains of dc pulses (H04Q0001390000 takes precedence);;
H04Q0001340000	Impulse regenerators with mechanical or other non-electrical marking arrangements
H04Q0001360000	Pulse-correcting arrangements, e.g. for reducing effects due to interference
H04Q0001380000	using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors
H04Q0001390000	using coded pulse groups
H04Q0001400000	whereby duration of pulse or interval between two pulses is variable
H04Q0001420000	involving the position of a pulse in a cycle
H04Q0001440000	using ac (H04Q0001500000 takes precedence);;
H04Q0001442000	with out-of-voice band signalling frequencies
H04Q0001444000	with voice-band signalling frequencies
H04Q0001446000	using one signalling frequency (H04Q0001460000 take precedence);;
H04Q0001448000	with conversion of a single frequency signal into a digital signal
H04Q0001450000	using multi-frequency signalling (H04Q0001460000 takes precedence);;
H04Q0001453000	in which m-out-of-n signalling frequencies are transmitted
H04Q0001457000	with conversion of multi-frequency signals into digital signals
H04Q0001460000	comprising means for distinguishing between a signalling current of predetermined frequency and a complex current containing that frequency, e.g. speech current
H04Q0001480000	Induced-current signalling arrangements
H04Q0001500000	Conversion between different kinds of signals
H04Q0001540000	Amplifier switched-on automatically in dependence on automatically selected lines
H04Q0001560000	Balancing circuitry switched-on automatically in dependence on automatically selected lines
H04Q0003000000	Selecting arrangements (H04Q0005000000-H04Q0011000000;  take precedence);;
H04Q0003020000	Circuit arrangements for selectors responsive to a permutation code
H04Q0003040000	Circuit arrangements for receivers of routing digits
H04Q0003060000	for group or trunk group selectors
H04Q0003080000	for local or long-distance selectors
H04Q0003100000	for PBX selectors, i.e. private branche exchange selectors
H04Q0003120000	for line selectors providing transfer of routing digits
H04Q0003140000	for two-way operation selectors
H04Q0003160000	for marking-switches
H04Q0003180000	Circuit arrangements for first stage of hunting switching
H04Q0003200000	for preselectors
H04Q0003220000	comprising common calling and disconnecting circuit
H04Q0003240000	for line finders
H04Q0003260000	comprising common calling and disconnecting circuit
H04Q0003280000	comprising main groups and subgroups
H04Q0003300000	Selector finders, i.e. allotters
H04Q0003320000	Circuit arrangements for second or subsequent stages of hunting switching
H04Q0003340000	for the second preselection stage
H04Q0003360000	for the second line-finder stage
H04Q0003380000	for stages after the group-selector stage
H04Q0003400000	for stages after the line selector, e.g. for extension selector
H04Q0003420000	Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
H04Q0003440000	using revertive control
H04Q0003460000	using signals other than revertive impulses
H04Q0003470000	using translators
H04Q0003480000	using markers
H04Q0003490000	for end-to-end marking
H04Q0003495000	for routing connecting paths
H04Q0003520000	using static devices in switching stages, e.g. electronic switching arrangements
H04Q0003540000	in which the logic circuitry controlling the exchange is centralised
H04Q0003545000	using a stored programme
H04Q0003550000	using wired logic circuitry
H04Q0003555000	being comprised by electro-magnetic devices
H04Q0003560000	in which the control signals are multiplexed
H04Q0003580000	Arrangements providing connection between main exchange and sub-exchange or satellite
H04Q0003600000	for connecting to satellites or concentrators which connect one or more exchange lines with a group of local lines
H04Q0003620000	for connecting to private branch exchanges
H04Q0003640000	Distributing or queueing
H04Q0003660000	Traffic distributors
H04Q0003680000	Grouping or interlacing selector groups or stages
H04Q0003700000	Identification of class of calling subscriber
H04Q0003720000	Finding out and indicating number of calling subscriber
H04Q0003740000	Identification of subscriber calling from a party-line
H04Q0003760000	Translation from the called subscriber's number to the outgoing or incoming control information
H04Q0003780000	Temporary storage of information of calling or called subscriber (intermediate storage means for telegraphic communication H04L0013080000);;
H04Q0005000000	Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
H04Q0005020000	with direct connection for all subscribers, i.e. party-line system (H04Q0005240000 takes precedence);;
H04Q0005040000	Signalling by currents in one or other or both line wires or additional wires
H04Q0005060000	Signalling by amplitude or polarity of dc
H04Q0005080000	Signalling by continuous ac
H04Q0005100000	using single frequencies for different subscribers
H04Q0005120000	using combinations of frequencies
H04Q0005140000	Signalling by pulses
H04Q0005160000	by predetermined number of pulses
H04Q0005180000	with indirect connection, i.e. through subordinate switching centre
H04Q0005200000	the subordinate centre permitting interconnection of subscribers connected thereto
H04Q0005220000	the subordinate centre not permitting interconnection of subscribers connected thereto
H04Q0005240000	for two-party-line systems
H04Q0007000000	Selecting arrangements to which subscribers are connected via radio links or inductive links
H04Q0007020000	for subscribers using radio or inductive link only
H04Q0007040000	with possibility of connection to and from line exchanges
H04Q0009000000	Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
H04Q0009020000	Automatically-operated arrangements
H04Q0009040000	Arrangements for synchronous operation
H04Q0009060000	Calling by using amplitude or polarity of dc
H04Q0009080000	Calling by using continuous ac
H04Q0009100000	using single different frequencies
H04Q0009120000	using combinations of frequencies
H04Q0009140000	Calling by using pulses
H04Q0009160000	by predetermined number of pulses
H04Q0011000000	Selecting arrangements for multiplex systems (multiplex systems H04J);;
H04Q0011020000	for frequency-division multiplexing
H04Q0011040000	for time-division multiplexing
H04R	ELECTROMECHANICAL TRANSDUCERS (for performing mechanical work B06B;use of transducers as sensing elements for measuring G01, G04; construction or circuits of vibrators whose output is of frequency unrelated to that of the electric supply G10K; recording or reproducing heads incorporating transducers G11B; dynamo-electric machines H02K)
H04R0001000000	Details of transducers covered by groups  H04R0009000000-H04R0023000000; (diaphragms H04R0007000000;mountings specially adapted for telephone equipment H04M0001020000)
H04R0001020000	Casings; Cabinets; Mountings therein (H04R0001280000 takes precedence);;
H04R0001040000	Structural association of microphone with electric circuitry therefor (in deaf-aid sets H04R0025000000);;
H04R0001060000	Arranging circuit leads; Relieving strain on circuit leads
H04R0001080000	Mouthpieces; Attachments therefor
H04R0001100000	Earpieces; Attachments therefor
H04R0001120000	Sanitary or hygienic devices for mouthpieces or earpieces, e.g. for protecting against infection
H04R0001140000	Throat mountings for microphones
H04R0001160000	Mounting or connecting stylus to transducer with or without damping means
H04R0001180000	Holders for styli; Mounting holders on transducers
H04R0001200000	Arrangements for obtaining desired frequency or directional characteristics (for stereophonic purposes H04R0005000000);;
H04R0001220000	for obtaining desired frequency characteristic only (circuits for combining transducers having different responses H04R0003000000);;
H04R0001240000	Structural combinations of separate transducers or of parts of the same transducer and responsive respectively to two or more frequency ranges
H04R0001260000	Spatial arrangement of separate transducers responsive to two or more frequency ranges
H04R0001280000	Transducer mountings or enclosures designed for specific frequency response; Transducer enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
H04R0001300000	Combinations of transducers with horns, e.g. with mechanical matching means (horns in general G10K);;
H04R0001320000	for obtaining desired directional characteristic only
H04R0001340000	by using a single transducer with sound reflecting, diffracting, directing or guiding means
H04R0001360000	by using a single aperture of dimensions not greater than the shortest operating wavelength
H04R0001380000	in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
H04R0001400000	by combining a number of identical transducers
H04R0001420000	Combinations of transducers with fluid-pressure or other non-electrical amplifying means
H04R0001440000	Special adaptations for subaqueous use, e.g. for hydrophone
H04R0001460000	Special adaptations for use as contact microphones, e.g. on musical instrument, on stethoscope (throat mountings H04R0001140000);;
H04R0003000000	Circuits for transducers (for stereophonic arrangements H04R0005040000;amplifiers H03F)
H04R0003020000	for preventing acoustic reaction
H04R0003040000	for correcting frequency response
H04R0003060000	of electrostatic transducers
H04R0003080000	of electromagnetic transducers
H04R0003100000	of variable-resistance microphones
H04R0003120000	for distributing signals to two or more loud-speakers
H04R0003140000	Cross-over networks
H04R0005000000	Stereophonic arrangements (stereophonic pick-ups H04R0009160000, H04R0011120000, H04R0017080000, H04R0019100000);;
H04R0005020000	Spatial or constructional arrangements of loud-speakers
H04R0005027000	Spatial or constructional arrangements of microphones, e.g. in dummy heads
H04R0005033000	Headphones for stereophonic communication
H04R0005040000	Circuit arrangements (combinations of amplifiers H03F0003680000;stereophonic systems H04S)
H04R0007000000	Diaphragms for electromechanical transducers (in general F16J0003000000);;Cones (for musical instruments G10);;
H04R0007020000	characterised by the construction
H04R0007040000	Plane diaphragms
H04R0007060000	comprising a plurality of sections or layers
H04R0007080000	comprising superposed layers separated by air or other fluid
H04R0007100000	comprising superposed layers in contact
H04R0007120000	Non-planar diaphragms or cones
H04R0007140000	corrugated, pleated, or ribbed
H04R0007160000	Mounting or tensioning of diaphragms or cones
H04R0007180000	at the periphery
H04R0007200000	Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
H04R0007220000	Clamping rim of diaphragm or cone against seating
H04R0007240000	Tensioning by means acting directly on free portion of diaphragm or cone
H04R0007260000	Damping by means acting directly on free portion of diaphragm or cone (air damping H04R0001280000);;
H04R0009000000	Transducers of moving-coil, moving-strip, or moving-wire type
H04R0009020000	Details
H04R0009040000	Construction, mounting, or centering of coil
H04R0009060000	Loud-speakers
H04R0009080000	Microphones
H04R0009100000	Telephone receivers
H04R0009120000	Gramophone pick-ups using a stylus; Recorders using a stylus
H04R0009140000	comprising two or more styli or transducers (H04R0009160000 takes precedence);;
H04R0009160000	signals being recorded or played-back by vibration of a stylus in two orthogonal directions simultaneously
H04R0009180000	Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency
H04R0011000000	Transducers of moving-armature or moving-core type (acoustic diaphragm of magnetisable material directly co-acting with electromagnet H04R0013000000);;
H04R0011020000	Loud-speakers
H04R0011040000	Microphones
H04R0011060000	Telephone receivers
H04R0011080000	Gramophone pick-ups using a stylus; Recorders using a stylus
H04R0011100000	comprising two or more styli or transducers (H04R0011120000 takes precedence);;
H04R0011120000	signals being recorded or played-back by vibration of a stylus in two orthogonal directions simultaneously
H04R0011140000	Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency
H04R0013000000	Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
H04R0013020000	Telephone receivers
H04R0015000000	Magnetostrictive transducers (magnetostrictive devices in general H01L0041000000);;
H04R0015020000	Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency
H04R0017000000	Piezo-electric transducers; Electrostrictive transducers (piezo-electric or electrostrictive devices in general H01L0041000000);;
H04R0017020000	Microphones
H04R0017040000	Gramophone pick-ups using a stylus; Recorders using a stylus
H04R0017060000	comprising two or more styli or transducers (H04R0017080000 takes precedence);;
H04R0017080000	signals being recorded or played-back by vibration of a stylus in two orthogonal directions simultaneously
H04R0017100000	Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency
H04R0019000000	Electrostatic transducers
H04R0019010000	characterised by the use of electrets
H04R0019020000	Loud-speakers (H04R0019010000 takes precedence);;
H04R0019040000	Microphones (H04R0019010000 takes precedence);;
H04R0019060000	Gramophone pick-ups using a stylus; Recorders using a stylus (H04R0019010000 takes precedence);;
H04R0019080000	comprising two or more styli or transducers (H04R0019100000 takes precedence);;
H04R0019100000	signals being recorded or played-back by vibration of a stylus in two orthogonal directions simultaneously
H04R0021000000	Variable-resistance transducers (gaseous-resistance transducers H04R0023000000;magneto-resistive transducers H04R0023000000)
H04R0021020000	Microphones
H04R0021040000	Gramophone pick-ups using a stylus; Recorders using a stylus
H04R0023000000	Transducers other than those covered by groups ; H04R0009000000-H04R0021000000
H04R0023020000	Transducers using more than one principle simultaneously
H04R0025000000	Deaf-aid sets (constructions of transducers per se H04R0009000000-H04R0023000000; structural combination with spectacle frames G02C0011060000)
H04R0025020000	adapted to be supported entirely by ear
H04R0025040000	comprising pocket amplifiers
H04R0027000000	Public address systems (circuits for preventing acoustic reaction H04R0003020000;circuits for distributing signals to loud-speakers H04R0003120000; amplifiers H03F)
H04R0027020000	Amplifying systems for the deaf
H04R0027040000	Electric megaphones
H04R0029000000	Monitoring arrangements; Testing arrangements
H04R0031000000	Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
H04S	STEREOPHONIC SYSTEMS (information storage on discs or tapes G11B;broadcast systems for the distribution of stereophonic information H04H0005000000; multiplex systems in general H04J)
H04S0001000000	Two-channel systems (H04S0005000000, H04S0007000000 take precedence);;
H04S0003000000	Systems employing more than two channels, e.g. quadraphonic (H04S0005000000, H04S0007000000 take precedence);;
H04S0003020000	of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other
H04S0005000000	Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation
H04S0005020000	of the pseudo four-channel type, e.g. in which rear channel signals are derived from two-channel stereo signals
H04S0007000000	Indicating arrangements; Control arrangements, e.g. balance control
H05	ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
H05B	ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR (apparatus for special application, see the relevant places, e.g. A47J, C21, C22, C23, F21, F24, F27);;
H05B0001000000	Details of electric heating devices
H05B0001020000	Automatic switching arrangements specially adapted to heating apparatus (control of temperature in general G05D0023000000;thermally-actuated switches H01H0037000000)
H05B0003000000	Ohmic-resistance heating
H05B0003020000	Details
H05B0003030000	Electrodes (electrothermic treatment of ores C22B0004000000);;
H05B0003040000	Waterproof or air-tight seals for heaters
H05B0003060000	Heater elements structurally combined with coupling elements or with holders
H05B0003080000	having electric connections specially adapted for high temperatures
H05B0003100000	Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor (compositions per se, see the relevant subclasses);;
H05B0003120000	characterised by the composition or nature of the conductive material
H05B0003140000	the material being non-metallic
H05B0003160000	the conductor being mounted on an insulating base
H05B0003180000	the conductor being embedded in an insulating material
H05B0003200000	Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater (H05B0003620000, H05B0003680000, H05B0003780000 take precedence);;
H05B0003220000	non-flexible
H05B0003240000	heating conductor being self-supporting
H05B0003260000	heating conductor mounted on insulating base
H05B0003280000	heating conductor embedded in insulating material
H05B0003300000	on or between metallic plates
H05B0003320000	heating conductor mounted on insulators on a metallic frame
H05B0003340000	flexible, e.g. heating nets or webs
H05B0003360000	heating conductor embedded in insulating material
H05B0003380000	Powder conductors
H05B0003400000	Heating elements having the shape of rods or tubes (H05B0003620000, H05B0003680000, H05B0003780000 take precedence);;
H05B0003420000	non-flexible
H05B0003440000	heating conductor arranged within rods or tubes of insulating material
H05B0003460000	heating conductor mounted on insulating base
H05B0003480000	heating conductor embedded in insulating material
H05B0003500000	heating conductor arranged in metal tubes, the radiating surface having heat-conducting fins
H05B0003520000	Apparatus or processes for filling or compressing insulating material in tubes
H05B0003540000	flexible
H05B0003560000	Heating cables
H05B0003580000	Heating hoses; Heating collars
H05B0003600000	Heating arrangements wherein the heating current flows through granular, powdered or fluid material, e.g. for salt-bath furnace, electrolytic heating (H05B0003380000 takes precedence);;
H05B0003620000	Heating elements specially adapted for furnaces (H05B0003600000 takes precedence;arrangements of such elements in furnaces F27, e.g. F27D0011000000)
H05B0003640000	using ribbon, rod, or wire heater
H05B0003660000	Supports or mountings for heaters on or in the wall or roof
H05B0003680000	Heating arrangements specially adapted for cooking plates or analogous hot-plates
H05B0003700000	Plates of cast metal
H05B0003720000	Plates of sheet metal
H05B0003740000	Non-metallic plates
H05B0003760000	Plates with spirally-wound heating tubes
H05B0003780000	Heating arrangements specially adapted for immersion heating
H05B0003800000	Portable immersion heaters
H05B0003820000	Fixedly-mounted immersion heaters
H05B0006000000	Heating by electric, magnetic, or electromagnetic fields (for therapeutic purposes A61N0005000000;joining of preformed parts by heating of plastics or substances in a plastic state B29C0065020000)
H05B0006020000	Induction heating
H05B0006040000	Sources of current
H05B0006060000	Control, e.g. of temperature, of power
H05B0006080000	using compensating or balancing arrangements
H05B0006100000	Induction heating apparatus, other than furnaces, for specific applications
H05B0006120000	Cooking devices
H05B0006140000	Tools, e.g. nozzles, rollers, calenders
H05B0006160000	Furnaces having endless cores (H05B0006340000 takes precedence);;
H05B0006180000	having melting basin
H05B0006200000	having melting channel only
H05B0006220000	Furnaces without an endless core (H05B0006340000 takes precedence);;
H05B0006240000	Crucible furnaces (H05B0006300000 takes precedence);;
H05B0006260000	using vacuum or particular gas atmosphere
H05B0006280000	Protective systems
H05B0006300000	Arrangements for remelting or zone melting
H05B0006320000	Arrangements for simultaneous levitation and heating
H05B0006340000	Arrangements for circulation of melts
H05B0006360000	Coil arrangements
H05B0006380000	specially adapted for fitting into hollow spaces of workpieces
H05B0006400000	Establishing desired heat distribution, e.g. to heat particular parts of workpieces
H05B0006420000	Cooling of coils
H05B0006440000	having more than one coil or coil segment
H05B0006460000	Dielectric heating (H05B0006640000 take precedence);;
H05B0006480000	Circuits
H05B0006500000	for monitoring or control
H05B0006520000	Feed lines
H05B0006540000	Electrodes
H05B0006560000	Rolling electrodes
H05B0006580000	"sewing machine" type
H05B0006600000	Arrangements for continuous movement of material
H05B0006620000	Apparatus for specific applications
H05B0006640000	Heating using microwaves
H05B0006660000	Circuits
H05B0006680000	for monitoring or control
H05B0006700000	Feed lines
H05B0006720000	Radiators or aerials
H05B0006740000	Mode transformers or mode stirrers
H05B0006760000	Prevention of microwave leakage, e.g. door sealings
H05B0006780000	Arrangements for continuous movement of material
H05B0006800000	Apparatus for specific applications
H05B0007000000	Heating by electric discharge (electron beam or ion beam tubes for localised treatment of objects H01J0037300000;plasma torches H05H0001260000)
H05B0007020000	Details
H05B0007060000	Electrodes
H05B0007070000	designed to melt in use
H05B0007080000	non-consumable
H05B0007085000	mainly consisting of carbon
H05B0007090000	Self-baking electrodes
H05B0007100000	Mountings, supports, terminals, or arrangements for feeding or guiding electrodes
H05B0007101000	Mountings, supports, or terminals at head of electrode, i.e. at the end remote from the arc
H05B0007102000	specially adapted for consumable electrodes
H05B0007103000	Mountings, supports, or terminals with jaws (H05B0007101000 takes precedence);;
H05B0007105000	comprising more than two jaws equally spaced along circumference, e.g. ring holders
H05B0007107000	specially adapted for self-baking electrodes
H05B0007109000	Feeding arrangements (H05B0007107000 takes precedence;where the electrode movement is a part of a closed loop for automatic control of power H05B0007148000)
H05B0007110000	Arrangements for conducting current to the electrode terminals (non-insulated conductors or conductive bodies in general H01B0005000000;insulated conductors or cables in general H01B0007000000)
H05B0007120000	Arrangements for cooling, sealing, or protecting electrodes
H05B0007140000	Arrangements or methods for connecting successive electrode sections
H05B0007144000	Power supplies specially adapted for heating by electric discharge; Automatic control of power, e.g. by positioning of electrodes (circuit arrangements for supplying electric power in general H02J);;
H05B0007148000	Automatic control of power (electrode feeding arrangements H05B0007109000;automatic feeding of electrodes for spot or seam welding or cutting B23K0009120000; disposition of electrodes in or on furnaces F27D0011100000; control of position in general G05D0003000000; regulating electric characteristics of arcs in general G05F0001020000; regulating electric power in general G05F0001660000)
H05B0007152000	by electromechanical means for positioning of electrodes
H05B0007156000	by hydraulic or pneumatic means for positioning of electrodes
H05B0007160000	Heating by glow discharge
H05B0007180000	Heating by arc discharge
H05B0007200000	Direct heating by arc discharge, i.e. where at least one end of the arc directly acts on the material to be heated, including additional resistance heating by arc current flowing through the material to be heated
H05B0007220000	Indirect heating by arc discharge
H05B0011000000	Heating by combined application of processes covered ty two or more of groups  H05B0003000000-H05B0007000000; (H05B0007200000 takes precedence);;
H05B0031000000	Electric arc lamps (regulating electric characteristics of arcs G05F0001020000;with non-consumable electrodes H01J0061000000)
H05B0031020000	Details
H05B0031040000	Housings
H05B0031060000	Electrodes
H05B0031080000	Carbon electrodes
H05B0031100000	Cored carbon electrodes
H05B0031120000	Beck-effect electrodes
H05B0031140000	Metal electrodes
H05B0031160000	Apparatus or processes specially adapted for manufacturing electrodes
H05B0031180000	Mountings for electrodes; Electrode feeding devices
H05B0031200000	Mechanical arrangements for feeding electrodes
H05B0031220000	Electromagnetic arrangements for feeding electrodes
H05B0031240000	Cooling arrangements
H05B0031260000	Influencing the shape of arc discharge by gas blowing devices
H05B0031280000	Influencing the shape of arc discharge by magnetic means
H05B0031300000	Starting; Igniting
H05B0031320000	Switching-off
H05B0031340000	Indicating consumption of electrodes
H05B0031360000	having two electrodes in line
H05B0031380000	specially adapted for ac
H05B0031400000	having two electrodes at an angle
H05B0031420000	specially adapted for ac
H05B0031440000	having two parallel electrodes
H05B0031460000	specially adapted for ac
H05B0031480000	having more than two electrodes
H05B0031500000	specially adapted for ac
H05B0031520000	electrodes energised from different phases of the supply
H05B0033000000	Electroluminescent light sources (discharge lamps H01J0061000000-H01J0065000000; semi-conductor devices with at least one particular jump barrier or surface barrier adapted for light emission H01L0033000000; lasers H01S0003000000; compositions per se, see the relevant subclasses);
H05B0033020000	Details
H05B0033040000	Sealing arrangements
H05B0033060000	Electrode terminals
H05B0033080000	Circuit arrangements not adapted to a particular application
H05B0033100000	Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
H05B0033120000	Light sources with substantially two-dimensional radiating surfaces
H05B0033140000	characterised by the chemical or physical composition or the arrangement of the electroluminescent material
H05B0033180000	characterised by the nature or concentration of the activator
H05B0033200000	characterised by the chemical or physical composition or the arrangement of the material in which the electroluminescent material is embedded
H05B0033220000	characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers
H05B0033240000	of metallic reflective layers (H05B0033260000 takes precedence);;
H05B0033260000	characterised by the composition or arrangement of the conductive material used as an electrode
H05B0033280000	of translucent electrodes
H05B0035000000	Electric light sources using a combination of different types of light generation (combinations of dissimilar light sources F21, H01J0061960000);;
H05B0037000000	Circuit arrangements for electric light sources in general
H05B0037020000	Controlling (regulating voltage or current G05F);;
H05B0037030000	Detecting lamp failure
H05B0037040000	Circuits providing for substitution of the light source in case of its failure
H05B0039000000	Circuit arrangements or apparatus for operating incandescent light sources and not adapted to a particular application
H05B0039020000	Switching-on, e.g. with predetermined rate of increase of lighting current
H05B0039040000	Controlling (regulating voltage or current G05F);;
H05B0039060000	Switching arrangements, e.g. from series operation to parallel operation
H05B0039080000	by shifting phase of trigger voltage applied to gas-filled controlling tubes
H05B0039090000	in which the lamp is fed by pulses
H05B0039100000	Circuits providing for substitution of the light source in case of its failure
H05B0041000000	Circuit arrangements or apparatus for igniting or operating discharge lamps
H05B0041020000	Details
H05B0041040000	Starting switches
H05B0041060000	thermal only
H05B0041080000	heated by glow discharge
H05B0041100000	magnetic only
H05B0041120000	combined thermal and magnetic
H05B0041140000	Circuit arrangements
H05B0041160000	in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac (H05B0041260000 takes precedence);;
H05B0041180000	having a starting switch
H05B0041190000	for lamps having an auxiliary starting electrode
H05B0041200000	having no starting switch
H05B0041220000	for lamps having an auxiliary starting electrode
H05B0041230000	for lamps not having an auxiliary starting electrode
H05B0041231000	for high-pressure lamps
H05B0041232000	for low-pressure lamps
H05B0041233000	using resonance circuitry
H05B0041234000	to eliminate stroboscopic effects, e.g. feeding two lamps with different phases
H05B0041240000	in which the lamp is fed by high-frequency ac (H05B0041260000 takes precedence);;
H05B0041260000	in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
H05B0041280000	using static converters
H05B0041290000	using semiconductor devices
H05B0041300000	in which the lamp is fed by pulses, e.g. flash lamp
H05B0041320000	for single flash operation
H05B0041340000	to provide a sequence of flashes
H05B0041360000	Controlling (regulating voltage or current G05F);;
H05B0041380000	Controlling the intensity of light
H05B0041390000	continuously
H05B0041391000	using saturable magnetic devices
H05B0041392000	using semiconductor devices, e.g. thyristor
H05B0041400000	discontinuously
H05B0041420000	in two steps only
H05B0041440000	for providing special optical effects, e.g. progressive motion of light
H05B0041460000	Circuits providing for substitution in case of failure of the lamp
H05B0043000000	Circuit arrangements for light sources, not otherwise provided for (H05B0037000000 takes precedence);;
H05B0043020000	for light sources using a charge of combustible material
H05C	ELECTRIC CIRCUITS OR APPARATUS SPECIALLY DESIGNED FOR USE IN EQUIPMENT FOR KILLING, STUNNING, ENCLOSING OR GUIDING LIVING BEINGS (stationary means for catching or killing insects by electric means A01M0001220000;slaughtering or stunning by electric current A22B0003060000)
H05C0001000000	Circuits or apparatus for generating electric shock effects
H05C0001020000	providing continuous feeding of dc or ac voltage
H05C0001040000	providing pulse voltages (mechanical self-interrupters H01H;electronic pulse-generators H03K)
H05C0001060000	operating only when touched
H05C0003000000	Other circuits
H05F	STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY (electrostatic machines H02N;uses of electricity in performing operations, e.g. precipitation, see the relevant subclasses for the operations);
H05F0001000000	Preventing the formation of electrostatic charges
H05F0001020000	by surface treatment
H05F0003000000	Carrying-off electrostatic charges (from living beings A61N0001140000);;
H05F0003020000	by means of earthing connections
H05F0003040000	by means of spark gaps or other discharge devices (devices providing for corona discharge per se H01T0019000000);;
H05F0003060000	by means of ionising radiation
H05F0007000000	Use of naturally-occurring electricity
H05G	X-RAY TECHNIQUE (X-ray therapy A61N;testing by X-rays G01N; apparatus for X-ray photography G03B; X-ray tubes H01J0035000000)
H05G0001000000	X-ray apparatus or circuits therefor (X-ray therapy A61N0005100000;filters, conversion screens, microscopes G21K)
H05G0001020000	Constructional details
H05G0001040000	Mounting the X-ray tube within a closed housing
H05G0001060000	X-ray tube and at least part of the power supply apparatus being mounted within the same housing
H05G0001080000	Electrical details
H05G0001100000	Power supply arrangements for feeding the X-ray tube
H05G0001120000	with dc or rectified single-phase ac
H05G0001140000	with single-phase low-frequency ac
H05G0001160000	Reducing the peak-inverse voltage
H05G0001180000	with polyphase ac of low frequency
H05G0001200000	with high-frequency ac; with pulse trains
H05G0001220000	with single pulses
H05G0001240000	Obtaining pulses by using energy storage devices (pulse generators H03K);;
H05G0001260000	Measuring, controlling, protecting (measuring electric values G01R;measuring X-ray intensity G01T)
H05G0001280000	Measuring or recording actual exposure time; Counting number of exposures; Measuring required exposure time
H05G0001300000	Controlling
H05G0001320000	Supply voltage of the X-ray apparatus or tube (regulating supply without reference to operating characteristics of the apparatus G05F);;
H05G0001340000	Anode current, heater current, heater voltage of X-ray tube (regulating supply without reference to operating characteristics of the apparatus G05F);;
H05G0001360000	Temperature of anode; Brightness of image
H05G0001380000	Exposure time
H05G0001400000	using adjustable time switch
H05G0001420000	using arrangements for switching when a predetermined dose of radiation has been applied, e.g. in which the switching instant is determined by measuring the electrical energy supplied to the tube
H05G0001440000	in which the switching instant is determined by measuring the amount of radiation directly
H05G0001460000	Combined control of different quantities, e.g. exposure time as well as voltage or current
H05G0001480000	Compensating the voltage drop occurring at the instant of switching-on of the apparatus (regulating supply without reference to operating characteristics of the apparatus G05F);;
H05G0001500000	Passing the tube current only during a restricted portion of the voltage waveform
H05G0001520000	Target size or shape; Direction of electron beam, e.g. in tubes with one anode and more than one cathode
H05G0001540000	Protecting (overload protection combined with control H05G0001460000);;
H05G0001560000	Switching-on; Switching-off
H05G0001580000	Switching arrangements for changing-over from one mode of operation to another, e.g. from radioscopy to radiography, from radioscopy to irradiation
H05G0001600000	Circuit arrangements for obtaining a series of X-ray photographs or for X-ray cinematography
H05G0001620000	Circuit arrangements for obtaining X-ray photography at predetermined instants in the movement of an object, e.g. X-ray stroboscopy
H05G0001640000	Circuit arrangements for X-ray apparatus incorporating image intensifiers
H05G0001660000	Circuit arrangements for X-ray tubes with target movable relatively to the anode
H05G0001680000	Circuit arrangements for Lilienfeld tubes; Circuit arrangements for gas-filled X-ray tubes
H05G0001700000	Circuit arrangements for X-ray tubes with more than one anode; Circuit arrangements for apparatus comprising more than one X-ray tube
H05H	PLASMA TECHNIQUE (fusion reactors G21B;ion-beam tubes H01J0027000000; magnetohydrodynamic generators H02K0044080000); PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS (obtaining neutrons from radioactive sources G21, e.g. G21B, G21C, G21G);;PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS (atomic clocks G04F0005140000;devices using stimulated emission H01S; frequency regulation by comparison with a reference frequency determined by energy levels of molecules, atoms, or subatomic particles H03L0007260000)
H05H0001000000	Generating plasma; Handling plasma
H05H0001020000	Arrangements for confining plasma by electric or magnetic fields; Arrangements for heating plasma (electron optics H01J);;
H05H0001030000	using electrostatic fields
H05H0001040000	using magnetic fields substantially generated by the discharge in the plasma
H05H0001060000	Longitudinal pinch devices
H05H0001080000	Theta pinch devices
H05H0001100000	using applied magnetic fields only
H05H0001110000	using cusp configuration (H05H0001140000 takes precedence);;
H05H0001120000	wherein the containment vessel forms a closed loop, e.g. stellarator
H05H0001140000	wherein the containment vessel is straight and has magnetic mirrors
H05H0001160000	using applied electric and magnetic fields
H05H0001180000	wherein the fields oscillate at a very high frequency, e.g. in the microwave range
H05H0001200000	Ohmic heating
H05H0001220000	for injection heating
H05H0001240000	Generating plasma
H05H0001260000	Plasma torches
H05H0001280000	Cooling arrangements
H05H0001300000	using applied electromagnetic fields, e.g. high-frequency or microwave energy (H05H0001280000 takes precedence);;
H05H0001320000	using an arc (H05H0001280000 takes precedence);;
H05H0001340000	Details, e.g. electrodes, nozzles
H05H0001360000	Circuit arrangements (H05H0001380000, H05H0001400000 take precedence);;
H05H0001380000	Guiding or centering of electrodes
H05H0001400000	using applied magnetic fields, e.g. for focusing or rotating the arc
H05H0001420000	with provisions for introducing materials into the plasma, e.g. powder, liquid (electrostatic spraying, spraying apparatus with means for charging the spray electrically B05B0005000000);;
H05H0001440000	using more than one torch
H05H0001460000	using applied electromagnetic fields, e.g. high frequency or microwave energy (H05H0001260000 takes precedence);;
H05H0001480000	using an arc (H05H0001260000 takes precedence);;
H05H0001500000	and using applied magnetic fields, e.g. for focusing or rotating the arc
H05H0001520000	using exploding wires or spark gaps (H05H0001260000 takes precedence;spark gaps in general H01T)
H05H0001540000	Plasma accelerators
H05H0003000000	Production or acceleration of neutral particle beams, e.g. molecular or atomic beams
H05H0003020000	Molecular or atomic-beam generation, e.g. resonant beam generation (gas masers H01S0001060000);;
H05H0003040000	Acceleration by electromagnetic wave pressure
H05H0005000000	Direct voltage accelerators; Accelerators using single pulses
H05H0005020000	Details (targets for producing nuclear reactions H05H0006000000);;
H05H0005030000	Accelerating tubes (vessels or containers of electric discharge tubes with improved potential distribution over surface of vessel H01J0005060000;shields of X-ray tubes associated with vessels or containers H01J0035160000)
H05H0005040000	energised by electrostatic generators, e.g. by van de Graaff generator
H05H0005060000	Tandem accelerators; Multi-stage accelerators
H05H0005080000	Particle accelerators using step-up transformers, e.g. resonance transformers
H05H0006000000	Targets for producing nuclear reactions (supports for targets or objects to be irradiated G21K0005080000);;
H05H0007000000	Details of devices of the types covered by groups  H05H0009000000-H05H0013000000; (targets for producing nuclear reactions H05H0006000000);;
H05H0007020000	Circuits or systems for supplying or feeding radio-frequency energy (radio-frequency generators H03B);;
H05H0007040000	Magnet systems; Energisation thereof
H05H0007060000	Two-beam arrangements; Multi-beam arrangements
H05H0007080000	Arrangements for injecting particles into orbits
H05H0007100000	Arrangements for ejecting particles from orbits
H05H0007120000	Arrangements for varying final energy of beam
H05H0007140000	Vacuum chambers (H05H0005030000 takes precedence);;
H05H0007160000	of the waveguide type
H05H0007180000	Cavities; Resonators
H05H0007200000	with superconductive walls
H05H0007220000	Details of linear accelerators, e.g. drift tubes (H05H0007020000-H05H0007200000;  take precedence);;
H05H0009000000	Linear accelerators (H05H0011000000 takes precedence);;
H05H0009020000	Travelling-wave linear accelerators
H05H0009040000	Standing-wave linear accelerators
H05H0011000000	Magnetic induction accelerators, e.g. betatrons
H05H0011020000	Air-cored betatrons
H05H0011040000	Biased betatrons
H05H0013000000	Magnetic resonance accelerators; Cyclotrons
H05H0013020000	Synchrocyclotrons, i.e. frequency-modulated cyclotrons
H05H0013040000	Synchrotrons
H05H0013060000	Air-cored magnetic resonance accelerators
H05H0013080000	Alternating-gradient magnetic resonance accelerators
H05H0013100000	Accelerators comprising one or more linear accelerating sections and bending magnets or the like to return the charged particles in a trajectory parallel to the first accelerating section, e.g. microtrons
H05H0015000000	Methods or devices for acceleration of charged particles not otherwise provided for
H05K	PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS (details of instruments or comparable details of other apparatus not otherwise provided for G12B;thin-film or thick-film circuits H01L0027010000, H01L0027130000; non-printed means for electric connections to or between printed circuits H01R; casings for, or constructional details of, particular types of apparatus, see the relevant subclassesprocesses involving only a single technical art, e.g. heating, spraying, for which provision exists elsewhere, see the relevant classes);
H05K0001000000	Printed circuits (assemblies of a plurality of individual semiconductor or solid state devices H01L0025000000;devices consisting of a plurality of solid state components formed in or on a common substrate, e.g. integrated circuits, thin-film or thick-film circuits, H01L0027000000)
H05K0001020000	Details
H05K0001030000	Use of materials for the substrate
H05K0001050000	Insulated metal substrate
H05K0001090000	Use of materials for the metallic pattern
H05K0001110000	Printed elements for providing electric connections to or between printed circuits
H05K0001140000	Structural association of two or more printed circuits (providing electric connection to or between printed circuits H05K0001110000, H01R0009090000, H01R0023680000);;
H05K0001160000	incorporating printed electric components, e.g. printed resistor, capacitor, inductor
H05K0001180000	Printed circuits structurally associated with non-printed electric components (H05K0001160000 takes precedence);;
H05K0003000000	Apparatus or processes for manufacturing printed circuits (preparation of originals for the photo-mechanical production of textured or patterned surfaces G03F0001000000;involving the manufacture of semiconductor devices H01L)
H05K0003020000	in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
H05K0003040000	the conductive material being removed mechanically, e.g. by punching
H05K0003060000	the conductive material being removed chemically or electrolytically, e.g. by photo-etch process
H05K0003070000	being removed electrolytically
H05K0003080000	the conductive material being removed by electric discharge, e.g. by spark erosion
H05K0003100000	in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
H05K0003120000	using printing techniques to apply the conductive material
H05K0003140000	using spraying techniques to apply the conductive material
H05K0003160000	by cathodic sputtering
H05K0003180000	using precipitation techniques to apply the conductive material
H05K0003200000	by affixing prefabricated conductor pattern
H05K0003220000	Secondary treatment of printed circuits
H05K0003240000	Reinforcing of the conductive pattern
H05K0003260000	Cleaning or polishing of the conductive pattern
H05K0003280000	Applying non-metallic protective coatings
H05K0003300000	Assembling printed circuits with electric components, e.g. with resistor
H05K0003320000	electrically connecting electric components or wires to printed circuits
H05K0003340000	by soldering
H05K0003360000	Assembling printed circuits with other printed circuits
H05K0003380000	Improvement of the adhesion between the insulating substrate and the metal
H05K0003400000	Forming printed elements for providing electric connections to or between printed circuits
H05K0003420000	Plated through-holes
H05K0003440000	Manufacturing insulated metal core circuits
H05K0003460000	Manufacturing multi-layer circuits
H05K0005000000	Casings, cabinets or drawers for electric apparatus (in general A47B;radio receiver cabinets H04B0001080000; television receiver cabinets H04N0005640000)
H05K0005020000	Details
H05K0005030000	Covers
H05K0005040000	Metal casings
H05K0005060000	Hermetically-sealed casings
H05K0007000000	Constructional details common to different types of electric apparatus (casings, cabinets, drawers H05K0005000000);;
H05K0007020000	Arrangements of circuit components or wiring on supporting structure
H05K0007040000	on conductive chassis
H05K0007060000	on insulating boards
H05K0007080000	on perforated boards
H05K0007100000	Plug-in assemblages of components
H05K0007120000	Resilient or clamping means for holding component to structure (holding two-part couplings together H01R0013000000);;
H05K0007140000	Mounting supporting structure in casing or on frame or rack
H05K0007160000	on hinges or pivots
H05K0007180000	Construction of rack or frame
H05K0007200000	Modifications to facilitate cooling, ventilating, or heating
H05K0009000000	Screening of apparatus or components against electric or magnetic fields (devices for absorbing radiation from an aerial H01Q0017000000);;
H05K0010000000	Arrangements for improving the operating reliability of electronic equipment, e.g. by providing a similar stand-by unit
H05K0011000000	Combinations of a radio or television receiver with apparatus having a different main function
H05K0011020000	with vehicles
H05K0013000000	Apparatus or processes specially adapted for manufacturing or adjusting assemblages of electric components
H05K0013020000	Feeding of components (in general B65G);;
H05K0013040000	Mounting of components
H05K0013060000	Wiring by machine
H05K0013080000	Monitoring manufacture of assemblages