ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS

Introduced: September 1968

Classification Context

Section:: ELECTRICITY
Class:: ELECTRIC ELEMENTS
Subclass:: ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS

Description

H01J covers electric discharge tubes and lamps that generate light or other radiation through electrical discharge in gases, vapors, or vacuums. This includes cathode ray tubes, fluorescent lamps, gas-filled tubes (such as neon and xenon tubes), vacuum tubes, X-ray tubes, and plasma display devices. The classification encompasses both the structural design of discharge devices and their operational principles, including electrode configurations, gas fills, and envelope materials. Closely related technologies in gas-filled devices may overlap with semiconductor light sources (H01L), which are classified separately.

Scope Notes

Glossary: Lamp lamps In this subclass, "lamp" includes tubes emitting visible, ultra-violet or infra-red light. Spark gap spark gaps A "spark gap" is an enclosed or non-enclosed discharge device having cold electrodes and used exclusively to discharge a quantity of electrical energy in a small time duration. Spectrometer spectrometers An instrument used to disperse radiant energy or particles into a spectrum and measure properties such as wavelength, mass, energy, or index of refraction. | Limiting references: Emission spectrometry Spark gaps, including gas-filled spark gaps Electric arc lamps Particle accelerators | Application references: Isotope separation using separate tubes Investigating or analyzing surface structures in atomic ranges using scanning-probe techniques Investigating or analyzing electrically excited material, e.g. electroluminescence Analyzing materials by investigating the ionization of gases; by investigating electric discharges, e.g. emission of cathode Mass spectrometers specially adapted for column chromatography Contactless testing of electronic circuits using electron beams Electrostatic dosimeters in general Secondary-emission measurement of nuclear or X-radiation Details of scanning-probe apparatus in general Gas lasers pumped by electric discharges Generating ions to be introduced into non-enclosed gases Tubes for generating potential differences by charges carried on a gas stream Light sources using a combination of discharge and other kinds of light generation (other than those covered in group ) Generating plasma in general

Related Keywords

ABSORPTION of gases in discharge tubesADSORPTION of gases in discharge tubesCENTERING of particle beams in discharge tubesCLEANING vessels of electric discharge tubesCOATING discharge tube, e.g. with luminescent materialCONCENTRATING of particle beams in discharge tubesmercury arc and other discharge tubes electric CONVERTERSDEFLECTION of particle beams in discharge tubesdischarge tubes operating as DETECTORSdischarge-tube DIODESDISCHARGE tubesELECTRON opticsFOCUSING of electromagnetic radiation or of particle beams in discharge tubesGEISSLER tubesHEADER(S) for discharge tubesIGNITING of electric discharge tubes or lampsIGNITRONSINSULATORS in discharge tubesKLYSTRONSlight sources for LAMP(S)(3) electrostatic, electron optical or magnetic LENS(ES) in discharge tubesMASKS in discharge tubesion MICROSCOPES; electron MICROSCOPESMULTIPLIER(S) -tubesmercury-arc or other discharge-tube rectifiersREFLECTION(S) of particle beams in discharge tubesRESONATORS used in discharge tubesSCREEN(S) in discharge tubesSEALS for discharge tubesion SOURCESSTEMS in discharge tubesTHERMIONIC generators; THERMIONIC convertersTHERMIONIC valveselectric discharge TUBE(S)electric discharge VALVESWINDOW(S) in X-ray tubes

29 direct subcodes

Child Classifications

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H01J 1/00 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
H01J 11/00 Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
H01J 13/00 Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes
H01J 15/00 Gas-filled discharge tubes with gaseous cathodes, e.g. plasma cathodes
H01J 17/00 Gas-filled discharge tubes with solid cathodes
H01J 19/00 Details of vacuum tubes of the types covered by group
H01J 21/00 Vacuum tubes
H01J 23/00 Details of transit-time tubes of the types covered by group
H01J 25/00 Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
H01J 27/00 Ion beam tubes
H01J 29/00 Details of cathode-ray tubes or of electron-beam tubes of the types covered by group
H01J 3/00 Details of electron-optical or ion-optical arrangements common to two or more basic types of discharge tubes or lamps
H01J 31/00 Cathode-ray tubes; Electron-beam tubes
H01J 33/00 Discharge tubes with provision for emergence of electrons or ions from the vessel; Lenard tubes
H01J 35/00 X-ray tubes
H01J 37/00 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
H01J 40/00 Photoelectric discharge tubes not involving the ionisation of a gas
H01J 41/00 Discharge tubes and means integral therewith for measuring gas pressure; Discharge tubes for evacuation by diffusion of ions
H01J 43/00 Secondary-emission tubes; Electron-multiplier tubes
H01J 45/00 Discharge tubes functioning as thermionic generators