Processes involving only a single technical art, e.g. drying, coating, for which provision exists elsewhere are classified in the relevant class for that art.
MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES (selection of magnetostrictive materials Fulltext... Hierarchy... Expanded...H01V 9/02)
H01F
Note(s)
Inductances and transformers are regarded in this sub-class as being "for power supply" if they are intended for this purpose even in systems operating at frequencies above 60 cycles/sec.
CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, OR LIGHT-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric Fulltext... Hierarchy... Expanded...H01B 3/00)
Bases, casings, or covers accommodating two or more switching devices, or a switching device as well as another electric component, e.g. bus-bar, line connector, are classified used in Fulltext... Hierarchy... Expanded...H02B 1/08.
For the purpose of this sub-class, the term "relay" is used to denote a switching device having contacts which are operated from electric inputs which supply, directly or indirectly, all the mechanical energy necessary to cause both the closure and the opening of the contacts.
Under the heading "emergency protective devices", this sub-class deals with devices for the protection of electric lines or electric machines or apparatus in the event of undesired change from normal electric working conditions, the electrical condition serving directly as the input to the device.
In this sub-class:
The expression "driving mechanism" refers to the means by which an operating force applied to the switch is transmitted to the moving contact or contacts. The word "operating" is used in a broader sense than "actuating" which is reserved for those parts not touched by hand to effect switching. The words "acting" and "action" denote a self-induced movement of parts at one stage of the switching. These connotations apply to all parts of the verbs "to operate", "to actuate", and "to act", and to words derived therefrom, e.g. to "actuation".
This sub-class deals only with devices for producing, influencing, or using a flow of electrons and/or ions, e.g. for controlling, indicating, or switching of electric current, counting electric pulses, producing light or other electromagnetic oscillations, such as X-rays, and having a closed or substantially closed casing containing a chosen gas, vapour, or vacuum, upon the pressure and nature of which the characteristics of the device depend. Light sources using a combination (other than covered by group Fulltext... Hierarchy... Expanded...H01J 61/96 of this sub-class) of discharge and other kinds of light generation are dealt with in Fulltext... Hierarchy... Expanded...H05B 35/00.
In this sub-class, the term "lamp" is understood to include tubes emitting ultra-violet or infra-red light.
Manufacture: Apparatus or processes specially adapted to the manufacture of electric discharge tubes, discharge lamps, or parts thereof are classified in group Fulltext... Hierarchy... Expanded...H01J 9/00.
Semiconductor devices as interpreted in this sub-class comprise inherently at least one potential-jump barrier which is essential to the desired operation of the device and which separates regions of different conductivity type, at least one region having P, P+, N, N+, I or S type conductivity.
In this sub-class, the term "waveguide type" as applied to transmission lines includes only high-frequency coaxial cables or Lecher lines, and as applied to resonators, delay lines, or other devices includes all devices having distributed inductance and capacitance.
In addition to the primary active radiating elements, this sub-class includes (a) secondary devices for absorbing or for modifying the direction and/or polarisation of waves radiated from aerials, and (b) combinations with auxiliary devices such as earthing switches, lead-in devices, and lightning protectors.
Devices of the waveguide type, such as resonators or lines, not designed as radiating elements are classified in sub-class Fulltext... Hierarchy... Expanded...H01P.
This sub-class deals with all kinds of contact-making disconnectible and non-disconnectible electric line connectors, coupling devices, lamp or similar holders or current collectors for all kinds of electric lines, cables or apparatus. Mounting of connections in or on specified apparatus is classified in the sub-class for such apparatus, e.g. mounting in junction or distribution boxes is classified in sub-class Fulltext... Hierarchy... Expanded...H02B or Fulltext... Hierarchy... Expanded...H02G, high-temperature connections for heating elements in group Fulltext... Hierarchy... Expanded...H05B 3/08. Structural association of one part of a two-part coupling device with specific electric apparatus is classified with the apparatus, e.g. association of cap with incandescent lamp is classified in sub-class Fulltext... Hierarchy... Expanded...H01K.
This sub-class deals with the generation, amplification, modulation, demodulation or frequency-changing of phase-coherent electromagnetic waves and other forms of wave energy by using stimulated emission
This sub-class deals with devices exhibiting thermo-electric, thermo-magnetic, galvano-magnetic, piezo-electric, electrostrictive, magnetostrictive, or superconductive effects.