Impregnated cathode structure

Details Impregnated cathode structure Impregnated cathode structure

1994-11-28

1995-10-17

Yusko, Donald J.

Electric lamp and discharge devices

With support and/or spacing structure for electrode and/or...

For indirectly heated cathode

313346R, 313441, 313346DC, H01J 1904

Patent

active

054593727

ABSTRACT:
An impregnated cathode structure has: (1) a sleeve having a truncated conically-shaped top portion with an opening having a predetermined diameter at the center thereof; (2) oxide cathode material formed within and conforming to the shape of the sleeve to form a point exposed through the opening; (3) a receiver forming part of said sleeve for retaining the oxide cathode material; (4) a backing plug which divides the inside of the sleeve so as to form a space for the receiver; and (5) a heater installed in the sleeve below the backing plug.

REFERENCES:
patent: 3176180 (1965-03-01), Affleck, III
patent: 3263115 (1966-07-01), Glascock, Jr. et al.
patent: 3436584 (1969-04-01), Hughes et al.
patent: 4379979 (1983-04-01), Thomas et al.
patent: 4417173 (1983-11-01), Tuck et al.
patent: 4528474 (1985-07-01), Kim
Dispenser Cathodes: The Current State of the Technology; L. R. Fulce, IEDM 83; pp. 448-451, Dec. 1983.

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