Fire detection system

Details Fire detection system Fire detection system

1975-06-10

1978-07-18

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

With particular coupling link

340164R, 325 31, 325 64, G08B 108

Patent

active

041018729

ABSTRACT:
A fire detection system for use in buildings is provided with transmitters which are listened to by remote receivers and which indicate the present conditions such as fire, smoke or dust, which are to be guarded against. The transmitters have a monitoring mode in which the monitoring mode signal is detected by the receivers within predetermined recurring successive intervals of time which are long relative to the time periods between successive monitoring mode signals and which are very long indeed compared with the duration of each monitoring mode signal.

REFERENCES:
patent: 3508260 (1970-04-01), Stein
patent: 3513443 (1970-05-01), Andersen
patent: 3703000 (1972-11-01), Kaplan
patent: 3902478 (1975-09-01), Konopasek et al.

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