Impregnated cathode

Details Impregnated cathode Impregnated cathode

1991-12-27

1994-03-22

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313337, H01J 2904

Patent

active

052967816

ABSTRACT:
An impregnated pallet including a porous metal body to which an electron radiating material is impregnated, a cathode ring having an upper portion in which the impregnated pallet is fitted, and a cathode sleeve containing a heater therein and having a closed upper end mounted to the lower end of the cathode ring such that the closed upper end surface thereof is in close contact with the lower surface of the impregnated pallet, so as to transmit directly the heat from the heater accumulated in the cathode sleeve to the impregnated pallet. A plurality of uniformly spaced metal ribbons are formed integrally with the lower end of the cathode ring. Each metal ribbon has an end fixed to the closed upper end surface of a cathode holder. In accordance with the present invention, the impregnated cathode has an improved construction capable of shortening the video producing time and simplifying the manufacturing process, thereby improving the workability and the productivity.

REFERENCES:
patent: 3823453 (1974-07-01), van Stratum et al.
patent: 4403169 (1983-09-01), Blanken

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