Analog fire sensor

Details Analog fire sensor Analog fire sensor

1986-03-28

1988-02-23

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340505, 340511, 340588, 34087017, 34082508, G08B 2600

Patent

active

047273593

ABSTRACT:
An analog fire detecting system in which a plurality of sensors produce analog data corresponding to a physical state such as temperature, smoke density, etc. relevant to a fire condition. The values of such analog data are compared with a predetermined threshold level, and if the threshold level is exceeded the analog data is transmitted to a central station in response to a polling signal therefrom. A CPU in the central station determines, from the analog data from the sensors, if there is a possibility of a fire and if so makes a predictive calculation of the remaining time until a fire condition will be reached. An alarm is given when such predicted time falls below a preset interval.

REFERENCES:
patent: 4100542 (1978-07-01), Gallant et al.
patent: 4254414 (1981-03-01), Street et al.
patent: 4536748 (1985-08-01), Tonello
patent: 4581604 (1986-04-01), Kimura et al.

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