Electron gun cathode with a fast warm-up characteristic

Details Electron gun cathode with a fast warm-up characteristic Electron gun cathode with a fast warm-up characteristic

1975-06-20

1976-12-28

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313337, 313345, H01J 2904, H01J 124

Patent

active

040004350

ABSTRACT:
An electron gun cathode for a cathode ray tube in which the cathode has a fast warm-up characteristic to produce a visible raster within about 6 seconds. The emissively-coated cathode cap is of reduced mass, with the cathode heater coil disposed within the cathode cap having a high weight to length ratio, and with a darkened coating thereon to increase the emissivity therefrom.

REFERENCES:
patent: 2386790 (1945-10-01), Gaun et al.
patent: 3549929 (1970-12-01), Pappadis
patent: 3881124 (1975-04-01), Buescher et al.
patent: 3883767 (1975-05-01), Buescher et al.

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