Incipient fire detector

Details Incipient fire detector Incipient fire detector

1973-04-11

1976-04-27

Caldwell, John W.

Communications: electrical

Systems

Call station

73 28, 734215A, 340236, G08B 1710

Patent

active

039538443

ABSTRACT:
The incipient fire detector employs a particulate monitor for detecting particulates in the atmosphere. During an incipient fire condition, prior to ignition, a large mass of particulates less than 5 microns in size is generated by the combustible material which increases the concentration of such particulates in the atmosphere. The detector samples and responds to the rate of increase of such particulates to provide an alarm when such rate exceeds a predetermined rate indicative of a hazardous condition. The particle collector employed in the incipient fire detector is specially designed to collect particulates less than five microns in size and reject those above this size.

REFERENCES:
patent: 3289481 (1966-12-01), Barnes
patent: 3653253 (1972-04-01), Olin
patent: 3715911 (1973-02-01), Chuan

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