False alarm resistant fire detector with improved performance

Details False alarm resistant fire detector with improved performance False alarm resistant fire detector with improved performance

1993-06-14

1997-01-07

Peng, John K.

Communications: electrical

Condition responsive indicating system

With particular system function

340577, 340587, 340628, 340632, G08B 1900

Patent

active

055921477

ABSTRACT:
A fire detector having a greatly reduced frequency of generating false alarms. An AND gate is responsive to outputs from first and second fire detector modules that are responsive to the detection of first and second characteristics of a fire, respectively, to signal the detection of a fire if both of these characteristics have been detected. At least one override path is included to enable the occurrence of a particular type of fire to be signalled that would not otherwise be signalled by the output of said AND gate.

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patent: 4638304 (1987-01-01), Kimura et al.
patent: 4640628 (1987-02-01), Seki et al.
patent: 4763115 (1988-08-01), Cota
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patent: 5053754 (1991-10-01), Wong
patent: 5079422 (1992-01-01), Wong
patent: 5103096 (1992-04-01), Wong
patent: 5276434 (1994-01-01), Brooks et al.

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