Decoder-operated television signal switch

Details Decoder-operated television signal switch Decoder-operated television signal switch

1988-12-14

1990-07-10

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

455 4, 455151, 307141, H04B 1116

Patent

active

049410482

ABSTRACT:
An enclosure, including an automatic television signal switch, has four coaxial cable connectors, a first for bringing in an input television signal, a second and a third for supplying signals to and from a decoder, and a fourth for supplying television signals to a television receiver. A signal splitter is connected to the first connector and supplies one television signal to a decoder via the second connector and another television signal to a first stationary contact of a relay. The second relay stationary contact is connected to the third connector which receives decoded signals from the decoder. The movable contact of the relay is connected to the fourth connector. The relay is powered by an internal DC power supply that is connected via a line cord and plug to a switched AC power outlet on the decoder. Turning the decoder on automatically energizes the relay to pass input the television signal to the decoder. When the decoder is off, the relay bypasses the decoder and passes input television signals directly to the television receiver.

REFERENCES:
patent: 4015074 (1977-03-01), Inoue et al.
patent: 4424591 (1984-01-01), Boardman
patent: 4463382 (1984-07-01), Pellegrini et al.
patent: 4527204 (1985-07-01), Kozakai et al.
patent: 4630313 (1986-12-01), Damoci
patent: 4783846 (1988-11-01), Wachob

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