Vacuum electron device having directly-heated matrix-cathode-hea

Details Vacuum electron device having directly-heated matrix-cathode-hea Vacuum electron device having directly-heated matrix-cathode-hea

1975-03-24

1976-09-28

Chatmon, Jr., Saxfield

Electric lamp and discharge devices

Electrode and shield structures

Filament or resistance heated electrodes

313346R, 313346DC, 313 39, 313 46, 313446, H01J 115, H01J 1708, H01K 102

Patent

active

039834433

ABSTRACT:
Device comprises an evacuated envelope and a heater-cathode assembly including an electrically-conductive, porous metal body containing electron-emission material and at least two electrically-resistive legs attached directly to spaced positions on the body. Electric current flowing through the legs and body generates heat in the legs, which heat is thermally conducted to the body. The parts are proportioned to reduce radiation losses by minimizing surface area. The structure reduces bulk and mass to permit short heating-up times.

REFERENCES:
patent: 3263115 (1966-07-01), Glascock, Jr. et al.
patent: 3440475 (1969-04-01), Schiller et al.
patent: 3633062 (1972-01-01), Tamura

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