Self-powered sensor for use in closed-loop security system

Details Self-powered sensor for use in closed-loop security system Self-powered sensor for use in closed-loop security system

1987-02-09

1988-05-17

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

340506, 340508, 340518, 340505, G08B 2300

Patent

active

047453982

ABSTRACT:
A self-powered sensor for a closed-loop security system includes a self-powered sensor network which provides a switch-actuating signal upon the detection of a physical condition. An electronic switch, which is in a normally closed position, is connected between the positive and negative poles of a closed-loop security system and opens the loop upon receipt of the switch-actuating signal thereby triggering an alarm. The self-powered sensor network may include a voltage doubler for converting the AC output of a transducer to a DC voltage of an amplitude sufficient to open the switch. When the switch is opened, voltage from the closed-loop security system becomes available to power a visible or audible alarm identifying the sensor that opened the loop.

REFERENCES:
patent: 4091660 (1978-05-01), Yanagi
patent: 4404548 (1983-09-01), Muller et al.
patent: 4413259 (1983-11-01), Lutz et al.
patent: 4423410 (1983-12-01), Galvin et al.
patent: 4603318 (1986-07-01), Philp

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