Communications: electrical – Condition responsive indicating system – With particular system function
Patent
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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Frazzini John A.
Peng John K.
Wu Daniel J.
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