Incipient fire detector

Details Incipient fire detector Incipient fire detector

1976-01-15

1977-07-12

Caldwell, John W.

Communications: electrical

Systems

Call station

250381, 313 54, G08B 1710

Patent

active

040357880

ABSTRACT:
The improved incipient fire detector employs an ionization particulate detector in combination with a particulate collector to monitor selectively small particulates in the atmosphere which are indicative of an incipient fire condition. During an incipient fire condition, prior to ignition, a large mass of particulates less than 5 microns in size is generated by combustible material thereby increasing the concentration of such size particulates in the atmosphere. The detector is designed to collect particulates less than 5 microns in size, rejecting those above this size, and channel the collected particulates at a controlled rate of flow into an ionization chamber wherein the concentration of such particulates is measured.

REFERENCES:
patent: 3154773 (1964-10-01), Meili et al.
patent: 3353170 (1967-11-01), Meili et al.
patent: 3953844 (1976-04-01), Barr et al.

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