Cathode for an electric discharge tube

Details Cathode for an electric discharge tube Cathode for an electric discharge tube

1990-03-30

1991-07-09

Yusko, Donald J.

Electric lamp and discharge devices

Electrode and shield structures

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

313337, 313270, H01J 113, H01J 114

Patent

active

050308793

ABSTRACT:
Cathode for an electric discharge tube having a short warm-up time and a long lifetime. The cathode comprises a metal (particularly nickel) support base coated with a layer of potentially electron-emissive material, which support base has a thickness ranging between 20 and 150 .mu.m, and metal crystallites having a size which does not permit of any further crystallite growth or recrystallization. Preferably, the crystallites of the support base have a size which corresponds to the thickness of the support base.

REFERENCES:
patent: 3958146 (1976-05-01), Buescher et al.

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