IPC 7 English version H01J 21/00-H01J 25/78

IPC ⁷ English version

H01J 11/00 - H01J 19/82

H01J02100-H01J02578

H01J 27/00 - H01J 31/68

SECTION H – ELECTRICITY

H 01

BASIC ELECTRIC ELEMENTS

H 01 J

ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; arc lamps with consumable electrodes H05B; particle accelerators H05H)

21/

Vacuum tubes (H01J 25/00, H01J 31/00 to H01J 40/00, H01J 43/00, H01J 47/00, H01J 49/00 take precedence; details of vacuum tubes H01J 19/00; cathode-ray or electron-stream lamps H01J 63/00)

21/

Tubes with a single discharge path

21/

without control means, i.e. diodes

21/

having electrostatic control means only

21/

with movable electrode or electrodes

21/

with one or more immovable internal control electrodes, e.g. triode, pentode, octode

21/

Tubes with variable amplification factor

21/

Tubes with means for concentrating the electron stream, e.g. beam tetrode

21/

with external electrostatic control means and with or without internal control electrodes

21/

having magnetic control means; having both magnetic and electrostatic control means

21/

Tubes with more than one discharge path; Multiple tubes, e.g. double diode, triode-hexode (secondary-emission tubes, electron-multiplier tubes H01J 43/00)

21/

with movable electrode or electrodes

21/

with variable amplification factor

21/

with means for concentrating the electron stream

21/

Tubes with electrode system arranged or dimensioned so as to eliminate transit-time effect (with flat electrodes H01J 21/36)

21/

Tubes with flat electrodes, e.g. disc electrode

23/

Details of transit-time tubes of the types covered by group H01J 25/00

23/

Electrodes; Magnetic control means; Screens (associated with resonator or delay system H01J 23/16)

23/

027

Collectors [2]

23/

033

Collector cooling devices [2]

23/

Cathodes

23/

having a cylindrical emissive surface, e.g. cathodes for magnetrons [3]

23/

Electron or ion guns

23/

065

producing a solid cylindrical beam (H01J 23/075 takes precedence) [3]

23/

producing a hollow cylindrical beam (H01J 23/075 takes precedence) [3]

23/

075

Magnetron injection guns [3]

23/

Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream

23/

083

Electrostatic focusing arrangements [3]

23/

087

Magnetic focusing arrangements [3]

23/

Electric systems for directing or deflecting the discharge along a desired path, e.g. E-type (focusing arrangements H01J 23/08)

23/

Magnet systems for directing or deflecting the discharge along a desired path, e.g. a spiral path (magnetic focusing arrangements H01J 23/08)

23/

Means for reducing noise (in electron or ion gun H01J 23/06)

23/

Vessels; Containers

23/

Leading-in arrangements; Seals therefor

23/

Means for preventing wave energy leakage structurally associated with tube leading-in arrangements, e.g. filters, chokes, attenuating devices [4]

23/

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)

23/

Resonators

23/

Cavity resonators; Adjustment or tuning thereof

23/

207

Tuning of single resonator [2]

23/

213

Simultaneous tuning of more than one resonator, e.g. resonant cavities of a magnetron [2]

23/

Connections between resonators, e.g. strapping for connecting resonators of a magnetron

23/

Slow-wave structures

23/

Helical slow-wave structures; Adjustment therefor

23/

Helix-derived slow-wave structures [3]

23/

Interdigital slow-wave structures; Adjustment therefor

23/

Damping arrangements associated with slow-wave structures, e.g. for suppression of unwanted oscillations

23/

Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for

23/

Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy [4]

23/

to or from the discharge [4]

23/

to or from the interaction circuit [4]

23/

the interaction circuit being a helix or a helix-derived slow-wave structure (H01J 23/44 to H01J 23/48 take precedence) [4]

23/

Rod-type coupling devices (H01J 23/46, H01J 23/48, H01J 23/54 take precedence) [4]

23/

Loop coupling devices [4]

23/

for linking interaction circuit with coaxial lines; Devices of the coupled helices type (H01J 23/46 takes precedence) [4]

23/

the interaction circuit being a helix or derived from a helix (H01J 23/52 takes precedence) [4]

23/

the coupled helices being disposed coaxially around one another [4]

23/

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 [4]

25/

Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons (details of transit-time tubes H01J 23/00; particle accelerators H05H)

25/

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 H01J 25/34)

25/

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

25/

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

25/

with electron stream perpendicular to the axis of the resonator

25/

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

25/

Extended interaction klystrons [2]

25/

with pencil-like electron stream in the axis of the resonators

25/

with tube-like electron stream coaxial with the axis of the resonators

25/

with pencil-like electron stream perpendicular to the axis of the resonators

25/

with radial or disc-like electron stream perpendicular to the axis of the resonators

25/

having special arrangements in the space between resonators, e.g. resistive-wall amplifier tube, space-charge amplifier tube, velocity-jump tube

25/

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

25/

in which the electron stream is in the axis of the resonator or resonators and is pencil-like before reflection

25/

in which the electron stream is coaxial with the axis of the resonator or resonators and is tube-like before reflection

25/

in which the electron stream is perpendicular to the axis of the resonator or resonators and is pencil-like before reflection

25/

in which the electron stream is perpendicular to the axis of the resonator or resonators and is radial or disc-like before reflection

25/

Tubes with plural reflection, e.g. Coeterier tube

25/

Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps

25/

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

25/

the forward-travelling wave being utilised

25/

the backward-travelling wave being utilised

25/

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 H01J 25/50)

25/

the forward-travelling wave being utilised

25/

the backward-travelling wave being utilised

25/

Tubes in which two electron streams of different velocities interact with one another, e.g. electron-wave tube

25/

Tubes using the parametric principle, e.g. for parametric amplification

25/

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 H01J 25/42; functioning with plural reflection or with reversed cyclotron action H01J 25/62, H01J 25/64)

25/

with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode

25/

having only one cavity or other resonator, e.g. neutrode tube (having a composite resonator H01J 25/58)

25/

Coaxial-cavity magnetrons [2]

25/

with interdigital arrangement of anodes, e.g. turbator tube

25/

having a number of resonators; having a composite resonator, e.g. a helix

25/

587

Multi-cavity magnetrons [2]

25/

593

Rising-sun magnetrons [2]

25/

with an electron space having a shape that prevents any electron from moving completely around the cathode or guide electrode; Linear magnetrons

25/

Hybrid tubes, i.e. tubes comprising a klystron section and a travelling-wave section [2]

25/

Strophotrons, i.e. tubes with H-field crossing the E-field and functioning with plural reflection

25/

Turbine tubes, i.e. tubes with H-field crossing the E-field and functioning with reversed cyclotron action

25/

Tubes with electron stream crossing itself and thereby interrupting, or interfering with, itself

25/

Tubes specially designed to act as oscillator with positive grid and retarding field, e.g. for Barkhausen-Kurz oscillators (with secondary emission H01J 25/76)

25/

with resonator having distributed inductance and capacitance, e.g. Pintsch tube

25/

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 H01J 25/70)

25/

Tubes specially designed to act as transit-time diode oscillators, e.g. monotron (with secondary emission H01J 25/76)

25/

Dynamic electron-multiplier tubes, e.g. Farnsworth multiplier tube, multipactor

25/

Tubes with electron stream modulated by deflection in a resonator

H01J 11/00 - H01J 19/82

H01J 27/00 - H01J 31/68