Fire alarm heat detector

Details Fire alarm heat detector Fire alarm heat detector

1993-09-07

1995-09-12

Swarthout, Brent

Communications: electrical

Condition responsive indicating system

Specific condition

340596, 374133, G08B 1700

Patent

active

054500664

ABSTRACT:
An electronic heat detector provides a fire alarm with a rapid rate of rise of temperature. The rate of rise indication is obtained from a comparison of outputs from a first temperature sensor which responds rapidly to environmental temperature, referenced to a second temperature sensor which has an intermediate response between that of the first sensor and an electronics board. The second sensor is positioned within a protuberance from the heat detector housing.

REFERENCES:
patent: 3387134 (1968-06-01), Treharne
patent: 3518654 (1970-06-01), Vassil
patent: 3768059 (1973-10-01), Day
patent: 3896423 (1975-07-01), Lindberg
patent: 4486743 (1984-12-01), Brown
patent: 4722612 (1988-02-01), Junkert et al.
patent: 4863279 (1989-09-01), Markel et al.
patent: 5103916 (1992-04-01), McLelland
patent: 5254975 (1993-10-01), Torikoshi
System Sensor Brochure, "Fire Safety Devices," pp. 1-6 and 20 (back cover) (1993).

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