Emergency alarm method and system utilizing cross cueing and ran

Details Emergency alarm method and system utilizing cross cueing and ran Emergency alarm method and system utilizing cross cueing and ran

1985-08-30

1988-05-24

Orsino, Joseph A.

Communications: electrical

Condition responsive indicating system

Specified indicator structure

340539, 340321, 340573, 455100, G08B 300

Patent

active

047469129

ABSTRACT:
An alarm signalling method and system utilizing cross cueing between radio, audio and visible alarm signals which are emitted by an alarm signalling unit. A method and system for measuring the range between the alarm signalling unit and a receiver carried by a rescuer wherein the differences in the time of receipt at the receiver of simultaneously emitted radio and audio signals is used as a measure of range.

REFERENCES:
patent: 4065767 (1977-12-01), Neuhof et al.
patent: 4468656 (1984-08-01), Clifford et al.

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