Impregnated cathode

Details Impregnated cathode Impregnated cathode

1991-02-27

1992-07-07

DeMeo, Palmer C.

Electric lamp and discharge devices

Electrode and shield structures

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

313270, H01J 128

Patent

active

051285843

ABSTRACT:
An impregnated dispenser cathode comprises a porous metal matrix having electron emissive material is impregnated therein and a cup for storing the porous metal matrix and being fixed together with it. The porous metal matrix is secured to the bottom of the cup. The present invention has the advantage of sharply promoting the value of products as it enhances both their life expectancies and the characteristics of large cathode ray tubes while increasing their reliability by greatly improving the defects of the structure and manufacturing method of conventional impregnated dispenser cathodes.

REFERENCES:
patent: 2673277 (1954-03-01), Lemmens et al.
patent: 4400648 (1983-08-01), Taguchi et al.
patent: 4982133 (1991-01-01), Choi

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