Smoke detector

Details Smoke detector Smoke detector

1984-05-11

1986-02-04

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

250574, 356439, G08B 1710

Patent

active

045689261

ABSTRACT:
A smoke detector utilizing a pulsing light source, a photo-voltaic cell, and an amplifier, in which the total current output on each light pulse is a function of the smoke concentration. In a preferred embodiment of the invention, the amplifier output current resulting from each light pulse is converted into an output signal which has a duration which is a function of smoke concentration.

REFERENCES:
patent: 4101785 (1978-07-01), Malinowski

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