Fire detector

Details Fire detector Fire detector

1992-03-04

1994-09-27

Peng, John K.

Communications: electrical

Condition responsive indicating system

Specific condition

250389, 250554, 340578, 340579, 340584, 340693, G08B 1712

Patent

active

053510348

ABSTRACT:
A fire detector includes a scattered light detector unit and an ionization detector unit which are arranged upon a common base at each side of the center axis of a compartment defined by the base and a peripheral wall extending from the base. The scattered light detector includes a light source and a receiver, with their principal axes intersecting in a point of intersection which is positioned at one side of the center axis of the compartment and thus extends eccentric to the center axis. The ionization detector unit includes a holder for a preparation to be ionized, with the holder being arranged at the other side of the center axis. Suitably, a heat detector is further provided in the center axis.

REFERENCES:
patent: 4405919 (1983-09-01), Scheidweiler
"BRK Double-System Smoke & Fire Detector", BRK Electronics Model 3001, Jun. 1984.

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