Dual spectrum infrared fire detector

Details Dual spectrum infrared fire detector Dual spectrum infrared fire detector

1973-06-29

1976-01-06

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250340, 250349, G01J 100

Patent

active

039315215

ABSTRACT:
Disclosed is a fire and explosion detection system wherein long wavelength radiant energy responsive signals are processed in one channel and compared to short wavelength radiant energy responsive signals which are processed in a second channel. When these signals are coincident in response to a fire or explosion of a predetermined threshold magnitude, an output fire suppression signal is generated.

REFERENCES:
patent: 2692982 (1954-10-01), Metcalf
patent: 3476938 (1969-11-01), Jankowitz et al.
patent: 3665440 (1972-05-01), McMenamin
patent: 3792275 (1974-02-01), Leftwich

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