Personal security system network

Details Personal security system network Personal security system network

1991-07-05

1992-05-19

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340539, 34082545, 34082549, 455 571, 455 341, G08B 2500

Patent

active

051152240

ABSTRACT:
A personal security system includes at least one movable transmitter adapted to produce an emergency signal transmission when activated and a plurality of transceivers adapted to receive emergency signal transmissions from the movable transmitter. The received strength of an emergency signal received by one of the transceivers is compared with the received signal strength of an emergency signal received by other of the transceivers, and an alarm signal is produced by a transceiver in response to receipt of a transmission whose signal strength is stronger than any other transmission signal strength to which it has been compared. The alarm signal may include a code identifying both the activated movable transmitter and the transceiver producing the alarm signal.

REFERENCES:
patent: 4764757 (1988-08-01), DeMarco et al.
patent: 4998095 (1991-03-01), Shields
patent: 5051741 (1991-09-01), Wesby
patent: 5055851 (1991-10-01), Sheffer

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