Telephone-operated stereo shut-off device

Details Telephone-operated stereo shut-off device Telephone-operated stereo shut-off device

1991-05-24

1993-08-03

Dwyer, James L.

Telephonic communications

Telephone line or system combined with diverse electrical...

Remote control

379110, 340310R, H04M 1100

Patent

active

052336468

ABSTRACT:
A telephone-operated stereo shut-off device for a stereo comprising a sensing component operatively associated with a telephone to sense an increase or decrease in voltage when the telephone rings, is answered or hung up. The device consists of a signal transmitting component that transmits a signal indicating the increase or decrease in voltage when electronically activated by the sensing component; a signal receiving component for receiving the signal transmitted by the radio transmitting component; and a switching component for opening and closing a speaker muting circuit located between a speaker and the stereo. The switching component is activated by the signal receiving component, wherein the speaker of the stereo is muted when an incoming telephone call is answered and conversely the speaker resumes operation after the telephone is hung up.

REFERENCES:
patent: 4058678 (1977-11-01), Dunn et al.
patent: 4243973 (1981-01-01), Sandidge
patent: 4389543 (1983-06-01), Granirer et al.
patent: 4425477 (1984-01-01), Magil
patent: 4805206 (1989-02-01), Beom-Chae
patent: 4873712 (1989-10-01), Porco
patent: 5051720 (1991-09-01), Kittirutsunetorn

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