Television receiver protection system

Details Television receiver protection system Television receiver protection system

1976-04-14

1978-02-14

Martin, John C.

Facsimile and static presentation processing

Facsimile

Recording apparatus

315411, H04N 568

Patent

active

040743233

ABSTRACT:
A television receiver protection system providing X-ray protection to the viewer responds to rectified horizontal flyback pulses supplied to the gate electrode of a silicon controlled rectifier through a zener diode to trigger the silicon controlled rectifier into conduction when the high voltage level from the flyback transformer of the receiver becomes abnormally high. The silicon controlled rectifier is connected across the power supply for the horizontal oscillator, so that the horizontal oscillator is rendered inoperative when the silicon controlled rectifier becomes conductive.

REFERENCES:
patent: 3576946 (1971-05-01), Frizane
patent: 3688031 (1972-08-01), Fitzgerald et al.
patent: 3692932 (1972-09-01), Willmarth
patent: 3715464 (1973-02-01), Sendelweck
patent: 3819986 (1974-06-01), Fukuoka
patent: 3885201 (1975-05-01), Fernsler

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