Cathode ray tube device of preheated type

Details Cathode ray tube device of preheated type Cathode ray tube device of preheated type

1974-05-13

1976-03-16

Hubler, Malcolm F.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315381, H01J 2970

Patent

active

039448800

ABSTRACT:
A cathode ray tube device includes a cathode ray tube of which cathode is heated in a waiting state as well as a normal operating state to emit an electron beam. The emitted electron beam in the waiting state is prevented from impinging the fluorescent surface of the tube by supplying a predetermined voltage or current independent of a signal for the normal operation to the grid of an electron gun assembly or a deflecting device.

REFERENCES:
patent: 3510722 (1970-05-01), Curtis
patent: 3535445 (1970-10-01), Griffery

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