Theft alarm

Details Theft alarm Theft alarm

1975-07-17

1976-10-26

Caldwell, John W.

Communications: electrical

Systems

Call station

340276, 340261, 340280, 325 16, 325355, G08B 108

Patent

active

039887243

ABSTRACT:
A theft alarm system which includes a transmitter and a receiver which may be fastened together during non-use, with the transmitter being secured to the equipment being protected. Removal of the receiver energizes both the transmitter and receiver. Subsequent movement of the transmitter or attempts to tamper with the transmitter produces a radio frequency signal. The signal is detected in the remote receiver and produces an alarm to alert the person carrying the receiver.

REFERENCES:
patent: 3618059 (1971-11-01), Allen
patent: 3618060 (1971-11-01), Nina
patent: 3646515 (1972-02-01), Vodehnal

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