Electron gun cathode and manufacturing method therefor

Details Electron gun cathode and manufacturing method therefor Electron gun cathode and manufacturing method therefor

1989-10-31

1991-05-07

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313270, 445 35, 445 46, H01J 2904, H01J 2948, H01J 904

Patent

active

050139657

ABSTRACT:
An electron gun cathode and a manufacturing method therefor includes a unitary cylindrical sleeve having a bottom with through-holes for the passage of the terminals of a heater. The heater is disposed in a closed space formed by the sleeve and a base joined to the sleeve opposite its bottom. The heater is sealed in the closed space of the sleeve and base to promote thermal efficiency, reduce heat loss between the base and the sleeve, and reduce power consumption of the cathode.

REFERENCES:
patent: 2386790 (1945-10-01), Gaun et al.
patent: 3898721 (1975-08-01), Decker et al.
patent: 4403169 (1983-09-01), Blanken

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