Cathode structure incorporating an impregnated substrate

Details Cathode structure incorporating an impregnated substrate Cathode structure incorporating an impregnated substrate

1987-01-14

1990-01-09

Griffin, Robert L.

Electric lamp and discharge devices

Electrode and shield structures

Cathodes containing and/or coated with electron emissive...

313292, 313332, 445 50, H01J 114, H01J 1906

Patent

active

048930520

ABSTRACT:
A cathode structure comprises a substrate including a porous sinter of a metal having a high melting point, which is impregnated with electron emitting material, a metal cup for receiving the substrate, a layer of solder disposed between the substrate and the metal cup, a covering layer disposed between the substrate and the solder layer and made of a metal having a melting point higher than that of the solder, a metal sleeve for supporting the metal cup, and a heater.

REFERENCES:
patent: 3488549 (1970-01-01), Amra
patent: 4349581 (1982-09-01), Asano et al.

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