Directly heated cathode for cathode ray tube

Details Directly heated cathode for cathode ray tube Directly heated cathode for cathode ray tube

1995-12-06

1997-09-16

O'Shea, Sandra L.

Electric lamp and discharge devices

Electrode and shield structures

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

313345, 313346DC, 313336, H01J 114, H01J 1906, H01J 116, H01J 1910

Patent

active

056684347

ABSTRACT:
A directly heated cathode structure includes a porous pellet impregnated with a cathode material, filaments connected to the porous pellet, a support supporting the filament, and an insulation block supporting the support, wherein the filaments are supported on the porous pellet by at least one auxiliary member. The supporting structure is very strong and the quality and productivity can be greatly improved by improvement of the filament welding process using the auxiliary members.

REFERENCES:
patent: 4313854 (1982-02-01), Sunahara et al.
patent: 4349766 (1982-09-01), Ando et al.
patent: 4382206 (1983-05-01), Kumada et al.
patent: 4823044 (1989-04-01), Falce
patent: 4843277 (1989-06-01), Winkler et al.
patent: 5057736 (1991-10-01), Noda et al.

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