Fire detecting system

Details Fire detecting system Fire detecting system

1983-05-19

1985-10-29

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

340587, 340628, G08B 1700

Patent

active

045503133

ABSTRACT:
A fire detecting system is disclosed, which comprises a sensor for producing an output voltage representing smoke level, heat, etc., and a comparator for producing a fire signal by comparing the output of the sensor or the differential or integral of the sensor output and a reference voltage. The sensor output or the differential or integral thereof is held in a peak hold circuit to be transferred through a switch to a sample-hold circuit for storage there.

REFERENCES:
patent: 4317113 (1982-02-01), Honma
patent: 4459583 (1984-07-01), van der Walt et al.

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