Communications: electrical – Condition responsive indicating system – Specified indicator structure
Patent
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.
Clifford Thomas
Jansen Bernard L.
Schwab Carl E.
Hofsass Jeffery A.
Orsino Joseph A.
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