Communications: electrical – Condition responsive indicating system – With particular coupling link
Patent
1981-06-24
1984-08-28
Crosland, Donnie L.
Communications: electrical
Condition responsive indicating system
With particular coupling link
340294, 340321, 340573, 455100, G08B 108
Patent
active
044686560
ABSTRACT:
An emergency signalling unit which is designed to be carried on the person of a fireman or other worker to alert control personnel should the worker become endangered, and an alarm system which incorporates a plurality of such signalling units, each one worn by a different fireman, for providing an alarm at a central station and an indication of which fireman is in trouble, as well as a means of locating him. The emergency signalling unit includes a radio transmitter, a high intensity strobe lamp, and an audio frequency generator. The alarm system includes a plurality of the above-mentioned radio transmitters, each transmitting on a different carrier frequency, and a receiver at a central control station exterior to the burning building, which is equipped to identify the respective carrier signals and to provide a visual indication of which fireman is in trouble as well as an audible signal to alert control personnel to the existence of an alarm condition.
REFERENCES:
patent: 3323117 (1967-05-01), Mason
patent: 3603952 (1971-09-01), Smith
patent: 4021807 (1977-05-01), Culpepper et al.
patent: 4121160 (1978-10-01), Cataldo
patent: 4218763 (1980-08-01), Kelley et al.
Ellis Cobem, "Honorary Companion of the Institute of Electronics", Jun. 1979, pp. 1, 2, 1-4.
"The Time has Come", Robert W. Grant, Fire Command, Oct. 1979, p. 17.
Clifford Thomas J.
Jansen Bernard L.
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