Fire alarm system

Details Fire alarm system Fire alarm system

1985-09-25

1987-09-29

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340526, 340529, G08B 2900

Patent

active

046971726

ABSTRACT:
A fire alarm system employing multiple sensors can accurately and quickly respond to real fires with an alarm signal and prevent issuance of a false alarm due to noise or the like. A pair of decision circuits in a fire signal receiver receive fire detection signals from respective sensors and produce fire occurrence signals representing a first level of probability that a fire has occurred and decision signals representing a second lower level of probability that a fire has occurred. A fire alarm is issued when a fire occurrence signal has been outputted by any one of the decision circuits or when a decision signal is simultaneously outputted by both decision circuits.

REFERENCES:
patent: 4195286 (1980-03-01), Galvin
patent: 4597451 (1986-07-01), Moore et al.

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