Photoelectric smoke detector

Details Photoelectric smoke detector Photoelectric smoke detector

1977-10-27

1979-10-16

Tokar, M.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

340630, G01N 2128

Patent

active

041714903

ABSTRACT:
A detection signal processing circuit for photoelectric smoke detectors reliably stable with respect to external noise is provided. Light receiving section of the detector for receiving light emitted intermittently from light emitting section and scattered by smoke particles comprises a light receiving element, a condenser charged depending on intermittent scattered light intensity received by the element and of a value over a predetermined level, and an output circuit providing an output to a following operation means only when charge amount of the condenser has reached a predetermined value. Optimumly, the predetermined value of the condenser charge is achieved when at least two or more of the intermittent scattered light are received continuously.

REFERENCES:
patent: 4075499 (1978-02-01), Malinowski

Affiliated with

Also associated with

Rating

Photoelectric smoke detector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photoelectric smoke detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photoelectric smoke detector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-806385