Fire sensor

Details Fire sensor Fire sensor

1992-09-24

1994-12-27

Peng, John K.

Communications: electrical

Condition responsive indicating system

Specific condition

340634, 73 2331, G08B 1710

Patent

active

053769244

ABSTRACT:
A fire sensing method and apparatus for detecting a fire based on the detection of a hydrocarbon gas produced before fire ignition and the detection of a second fire indicating phenomenon. Such other phenomenon may comprise the detection of temperature, radiation or combustion product gases. The detection of hydrocarbon gas may generate a pre-alarm condition which permits the use of higher sensitivity conditions for the second fire indicating phenomenon.

REFERENCES:
patent: 3765842 (1973-10-01), Purt
patent: 4088986 (1978-05-01), Boucher
patent: 4630038 (1986-12-01), Jordan
patent: 4778113 (1988-10-01), Jewett et al.
patent: 5053754 (1991-10-01), Wong
patent: 5146209 (1992-09-01), Beghelli

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