System for monitoring the ignition function of rapid extinguishi

Details System for monitoring the ignition function of rapid extinguishi System for monitoring the ignition function of rapid extinguishi

1982-03-15

1983-10-18

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

With particular system function

169 23, 169 41, 169 61, 340661, G08B 2100

Patent

active

044108826

ABSTRACT:
In a fire sprinkler system a plurality of physically distributed actuators are connected in a normally balanced bridge circuit. The bridge circuit is impressed with a pulsed measuring voltage thereacross to conserve power. LEDs are connected to the bridge for indicating either normal or unbalanced conditions of the bridge as well as indicating which actuator branch of the bridge is causing unbalance.

REFERENCES:
patent: 2871466 (1959-01-01), Vassil et al.
patent: 3143729 (1964-08-01), Power
patent: 3636540 (1972-01-01), Harris
patent: 3801972 (1974-04-01), Ho Kim et al.
patent: 3821726 (1974-06-01), Chang et al.
patent: 4007456 (1977-02-01), Paige et al.
patent: 4281718 (1981-08-01), Claussen et al.
patent: 4359097 (1982-11-01), Claussen
IBM Technical Disclosure Bulletin; vol. 14, No. 5; Oct. 1971; p. 1368; "Resistance Testor" by A. Yanischeff

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