Method of fire detection and fire detection installation

Details Method of fire detection and fire detection installation Method of fire detection and fire detection installation

1981-04-27

1983-09-20

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

With particular system function

340587, 340628, 340629, 340630, G08B 1710

Patent

active

044059191

ABSTRACT:
A fire alarm installation possessing increased intelligence which enables differentiating between smoldering fires and fires having open or licking flames. This capability is obtained in that the fire alarm installation possesses two sensor elements working according to different functional principles and an evaluation circuit contains circuit elements which form the quotient of the signals received from both sensor elements. The different sensor elements can be united in a single fire alarm housing which simultaneously contains the evaluation circuit.

REFERENCES:
patent: 3717862 (1973-02-01), Sasaki
patent: 3909813 (1975-09-01), Scheidweiler et al.
patent: 4225860 (1980-09-01), Conforti
patent: 4288790 (1981-09-01), Schnell
patent: 4316184 (1982-02-01), Nagel

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