Alarm system having plural diverse detection means

Details Alarm system having plural diverse detection means Alarm system having plural diverse detection means

1980-06-09

1982-03-09

Waring, Alvin H.

Communications: electrical

Condition responsive indicating system

With particular system function

340501, 340517, 340533, 340577, G08B 1710, G08B 1712, G08B 1719

Patent

active

043192297

ABSTRACT:
A system for detecting a fire emergency condition employs three separate and diverse sensors; a heat detector, a smoke detector, and an infrared radiation detector. Either or all of these detectors can activate the alarm. Additionally, the infrared radiation detector can be used to control the energization of the room's artificial illumination means. All sensors are mounted in a common housing and a mirror or lens arrangement is provided to focus the infrared radiation upon the appropriate detector.

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patent: D241824 (1976-10-01), Mackay
patent: 3312826 (1967-04-01), Finkle
patent: 3313946 (1967-04-01), Goodwin
patent: 3430220 (1969-02-01), Deuth
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patent: 3810171 (1974-05-01), Schubert
patent: 3881112 (1975-04-01), Roberts
patent: 3921168 (1975-11-01), Dunbar
patent: 4178522 (1979-12-01), MacLennan et al.

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