Smoke detecting apparatus capable of detecting both smoke fine p

Details Smoke detecting apparatus capable of detecting both smoke fine p Smoke detecting apparatus capable of detecting both smoke fine p

1993-12-23

1995-12-19

Peng, John K.

Communications: electrical

Condition responsive indicating system

Specific condition

340628, 340629, 250574, 356 43, G08B 1710

Patent

active

054772184

ABSTRACT:
A light emitting device for projecting a light beam onto a monitor area, and a light receiving device, arranged so that a light beam is not directly received by the device, for receiving diffused light caused as a result of fine particles, such as dust, or smoke caused by a fire, entering the monitor area, are provided. Also, an amplifying device for amplifying an output from the light receiving device, and a counting device for counting the output from the amplifying device in units of time are provided. In addition, a computing device for computing an average value or an integrated value of the output from the amplifying device in units of time, and a determining device for determining the level of contamination of the monitor area on the basis of the count value of the counting device and for determining the level of the fire on the basis of the average value or the integrated value computed by the computing device, are provided. As a result, a smoke detecting apparatus consisting of a single unit capable of detecting both smoke and fine particles can be provided, the apparatus detecting a fire on the basis of an environmental abnormality.

REFERENCES:
patent: 4225791 (1980-09-01), Kompelien
patent: 4260984 (1981-04-01), Honma
patent: 4405919 (1983-09-01), Scheidweiller
patent: 4506161 (1985-03-01), Muggli et al.
patent: 4556873 (1985-12-01), Yamada et al.
patent: 4638304 (1987-01-01), Kimura et al.
patent: 4647789 (1987-03-01), Guttinger et al.
patent: 4665311 (1987-05-01), Cole
patent: 4670741 (1987-06-01), Cole
patent: 4692750 (1987-09-01), Murakami et al.
patent: 4755048 (1988-07-01), Kaufman
patent: 4757306 (1988-07-01), Kimura
patent: 4785283 (1988-11-01), Yuchi
patent: 4827247 (1989-05-01), Giffone
patent: 4839527 (1989-06-01), Leitch
patent: 5172004 (1992-12-01), Furuya

Affiliated with

Also associated with

Rating

Smoke detecting apparatus capable of detecting both smoke fine p 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 detecting apparatus capable of detecting both smoke fine p, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Smoke detecting apparatus capable of detecting both smoke fine p will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-994480