Bed egress alarm circuit

Details Bed egress alarm circuit Bed egress alarm circuit

1975-05-16

1976-03-30

Caldwell, John W.

Communications: electrical

Systems

Call station

340278, 307279, 200 85R, 128 2S, G08B 2100

Patent

active

RE0287547

ABSTRACT:
A condition responsive circuit for generating an output signal upon the opening of a switch. An FET draws nominal current when the switch is closed. When the switch is opened the FET conducts to generate an output. The output may include an audio alarm, an oscillator and a transmitter to generate an alarm at a distant location, or a visual indicator.

REFERENCES:
patent: 3302685 (1967-02-01), Ono et al.
patent: 3638642 (1972-02-01), Heflin
patent: 3658052 (1972-04-01), Alter
patent: 3727606 (1973-04-01), Sielaff

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