Cathode structure for an electron tube

Details Cathode structure for an electron tube Cathode structure for an electron tube

1977-08-03

1979-03-06

Chatmon, Jr., Saxfield

Electric lamp and discharge devices

Electrode and shield structures

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

313337, 313341, H01J 114, H01J 1906, H01K 104

Patent

active

041432959

ABSTRACT:
A cathode structure for an electron tube comprises a filament unit and a supporter on which the filament unit is mounted. The filament unit includes a thoriated tungsten wire and a tungsten carbide layer formed by carburizing the surface of the wire, the wire having a diameter of about 0.6 - 0.8 mm and the carbide layer having a thickness of about 5 - 30 .mu., so that the resulting cathode structure enjoys a long life.

REFERENCES:
patent: 2998544 (1961-08-01), Crapuchettes
patent: 3177393 (1965-04-01), Gerlach et al.
patent: 3289023 (1966-11-01), Adikes et al.
patent: 3558970 (1971-01-01), Van De Goor et al.
patent: 3600334 (1971-08-01), Koncz

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