Solid thermionic cathodes

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

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 > Main electrodes > Solid thermionic cathodes

CPC:

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 or ion-optical arrangements H01J3/00) > Main electrodes > Solid thermionic cathodes

Of 4 combined children, 3 exist in both systems.

1 codes are CPC-only extensions.

Child Classifications

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H01J 1/135 CPC only CPC only
H01J 1/14 characterised by the material IPC+CPC Available in IPC and CPC
H01J 1/15 Cathodes heated directly by an electric current IPC+CPC Available in IPC and CPC
H01J 1/20 Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment IPC+CPC Available in IPC and CPC