DIFF Subgroup
H01J 61/84 Lamps with discharge constricted by high pressure
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Gas-discharge or vapour-discharge lamps > Lamps with discharge constricted by high pressure
CPC:
Gas-discharge or vapour-discharge lamps (arc lamps with consumable electrodes H05B; electroluminescent lamps H05B) > Lamps with discharge constricted by high pressure
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
Child Classifications
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- H01J 61/86 with discharge additionally constricted by close spacing of electrodes, e.g. for optical projection IPC+CPC Available in IPC and CPC
- H01J 61/90 Lamps suitable only for intermittent operation, e.g. flash lamp IPC+CPC Available in IPC and CPC