Doorbell actuated television security system

Details Doorbell actuated television security system Doorbell actuated television security system

1981-01-05

1983-01-25

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 86, 358181, 34082537, H04N 718

Patent

active

043706754

ABSTRACT:
A video security system with intercom activated by means of a doorbell. The video input to a remote camera is automatically presented on the video display of a television receiver upon activation of the doorbell while audio from the intercom's speaker microphone is output through the television receiver's speaker system. Following a predetermined time interval after doorbell actuation, the system automatically turns off. If the television receiver is on when the doorbell is actuated, the system automatically provides video camera and intercom information at the television, reverting to the received television signal mode of operation upon user selection.

REFERENCES:
patent: 3480727 (1969-11-01), Moore et al.
patent: 4075659 (1978-02-01), Desanti

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