Personal security system network
First Claim
1. A personal security system comprising:
- at least one movable transmitter adapted to produce an emergency signal transmission when activated;
a plurality of transceivers adapted to receive emergency signal transmissions from the movable transmitter;
means for comparing the received strength of an emergency signal received by one of said transceivers with the received signal strength of an emergency signal received by others of said transceivers; and
means for causing a transceiver to produce an alarm signal only in response to receipt of a transmission whose signal strength is at least as strong as any other received signal strength to which it has been compared.
2 Assignments
0 Petitions
Accused Products
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.
100 Citations
13 Claims
-
1. A personal security system comprising:
-
at least one movable transmitter adapted to produce an emergency signal transmission when activated; a plurality of transceivers adapted to receive emergency signal transmissions from the movable transmitter; means for comparing the received strength of an emergency signal received by one of said transceivers with the received signal strength of an emergency signal received by others of said transceivers; and means for causing a transceiver to produce an alarm signal only in response to receipt of a transmission whose signal strength is at least as strong as any other received signal strength to which it has been compared. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
Specification