Apparatus and methods for detecting an incipient fire condition

Details Apparatus and methods for detecting an incipient fire condition Apparatus and methods for detecting an incipient fire condition

1978-05-09

1980-09-23

Kreitman, Stephen A.

Measuring and testing

Miscellaneous

340627, G01N 1502

Patent

active

042235596

ABSTRACT:
Apparatus and methods for detecting an incipient fire condition based on a shift in the size distribution of particles generated by a developing incipient fire condition. Particulate mass concentrations of at least two different particulate sizes are monitored and the ratio of the outputs from the sensing devices is processed as an indication of an incipient fire condition. In another form of the invention, the rate of change of the ratio of the outputs from the monitoring devices is processed as an indication of an incipient fire condition.

REFERENCES:
patent: 3678487 (1972-07-01), Ludewig, Jr. et al.
patent: 3719089 (1973-03-01), Kelsall et al.
patent: 3953844 (1976-04-01), Barr et al.
patent: 4035788 (1977-07-01), Barr

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