Latching alarm smoke detector

Details Latching alarm smoke detector Latching alarm smoke detector

G - Physics

08

B

340/163, 340/140

G08B 17/10 (2006.01) G08B 17/107 (2006.01)

Patent

CA 1107839

ABSTRACT An optical smoke detector with a clock pulsed light source and photodiodes responding to smoke scattered light includes an alarm initiating logic circuit which delays the initiating of alarm while several samplings of smoke are sensed and then latches the logic circuit in alarm condition.

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