Smoke detector

Details Smoke detector Smoke detector

1979-03-01

1981-11-10

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

250574, G08B 1710

Patent

active

043001335

ABSTRACT:
The smoke detector uses modulation techniques to differentiate within a smoke detection chamber between ambient energy and energy from a transmitting source. A delayed automatic gain control is provided to reduce the effects of slow change of parameters in the detector itself and to provide greater discrimination between smoke which should cause an alarm and smoke resulting from, for example, tobacco. The smoke detector further provides for increased signal-to-noise ratios thus providing for more accurate and precise measurements.

REFERENCES:
patent: 3155954 (1964-11-01), Larrick et al.
patent: 3316410 (1967-04-01), Meili et al.
patent: 3761908 (1973-09-01), Gehman
patent: 3778807 (1973-12-01), Ralston
patent: 3924252 (1975-12-01), Duston
patent: 4121110 (1978-10-01), Solomon
patent: 4126790 (1978-11-01), Solomon

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2364523