Television receiver ferroresonant load power supply disabling ci

Details Television receiver ferroresonant load power supply disabling ci Television receiver ferroresonant load power supply disabling ci

1981-09-03

1983-06-28

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Power supply from deflection circuit source

358190, 358243, H01J 2970

Patent

active

043908209

ABSTRACT:
The primary winding of a high leakage transformer is coupled to a source of alternating input voltage for developing an alternating supply voltage across a secondary winding of the transformer. A self-regulating, ferroresonant load circuit includes a saturable reactor that has a first winding coupled to the transformer secondary winding for regulating the supply voltage. A high voltage winding of the transformer steps up the supply voltage. The stepped up voltage is rectified to produce an ultor accelerating potential for a color picture tube of a television receiver. If the saturable reactor first winding is disconnected from the transformer secondary winding, the supply voltage and ultor accelerating potential undesirably tend to increase in amplitude. To protect against the emission of excessive X-radiation from the phosphor screen of the picture tube in such an event, the heater filaments of the picture tube cathode electrodes are energized by a second winding of the saturable reactor. If the saturable reactor first winding becomes disconnected, heater energization is removed, producing a blank picture screen.

REFERENCES:
patent: 3433896 (1969-03-01), Sakai et al.
patent: 3798369 (1974-03-01), Dietch
patent: 3798493 (1974-03-01), Manske
patent: 3798497 (1974-03-01), Manske
patent: 3868538 (1975-02-01), Blanchard
patent: 3955115 (1976-05-01), Manske
patent: 3970915 (1976-07-01), Suchko
patent: 4262245 (1981-04-01), Wendt
General Electric Technical Training Manual Supplement, EC-N Chassis & Schematic, published 12/79.

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