Security system having detector means sensitive to the proximity

Details Security system having detector means sensitive to the proximity Security system having detector means sensitive to the proximity

1989-05-01

1991-06-04

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

With particular coupling link

340572, 340573, G08B 2100

Patent

active

050217658

ABSTRACT:
A security system suitable for monitoring the presence of the occupants of a vessel such as a sailing yacht has two receivers at fixed locations on the yacht for receiving signals from one of a number of transmitters each worn by a respective crew member. The receivers are connected to a detector having a comparator triggered when a predetermined relative signal strength is generated by the receivers indicating the presence of a transmitter in an "unsafe" region acting to cause triggering of an alarm and automatic ejection of a life buoy or other life saving equipment.

REFERENCES:
patent: 4212002 (1980-07-01), Williamson
patent: 4308530 (1981-12-01), Kip et al.

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