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CPC Subgroup
H01J 1/20

Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment

Full Title

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 > Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment

4 direct subcodes

Child Classifications

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  • H01J 1/22 Heaters
  • H01J 1/24 Insulating layer or body located between heater and emissive material
  • H01J 1/26 Supports for the emissive material
  • H01J 1/28 Dispenser-type cathodes, e.g. L-cathode