LINEAR SMOKE DETECTOR Russian patent published in 2006 - IPC G08B17/10 

FIELD: signaling devices, particularly automatic fire alarms.

SUBSTANCE: smoke detector comprises working chamber and two radiation sources optically connected with each other, as well as radiation receiver, amplifier, sample-and-hold means, analog-digital converter, digital-analog converter, control means, which provides radiation source activation sequence and one radiation source radiation power change and execute means.

EFFECT: reduced sensitivity to external action and increased operational reliability of smoke detector.

4 dwg