Wireless multi-head smoke detector system

Details Wireless multi-head smoke detector system Wireless multi-head smoke detector system

1977-10-03

1979-07-03

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

250574, 356340, 340539, 340636, 356438, G08B 1710

Patent

active

041602463

ABSTRACT:
A wireless smoke detector apparatus including at least one detector/transmitter unit and a receiver/annunciator unit. The detector/transmitter having a pulsed infrared radiation source, a photodetector having an optical axis angularly intersecting the axis of the radiation source for detecting radiation scattered by smoke particles and a transmitter responsive to the output of the detector for transmitting a unique receiver/annunciator actuating signal which is distinguishable by the receiver/annunciator from other actuating signals.

REFERENCES:
patent: 3852740 (1974-12-01), Haymes
patent: 3946241 (1976-03-01), Malinowski
patent: 3967258 (1976-06-01), Bucy, Jr.
patent: 4063410 (1977-12-01), Welling

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