Rapid fire detector

Details Rapid fire detector Rapid fire detector

1990-04-02

1992-04-07

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250339, 250352, G01N 2161

Patent

active

051030969

ABSTRACT:
A compact low-cost fire detector responds quickly by detecting an increase in the concentration of carbon dioxide gas in the ambient air. The detector also calculates the rate of build-up of carbon dioxide. The detector avoids the use of moving parts by employing a differential temperature black body source of infrared radiation in conjunction with a dual pass band filter. One of the pass bands is located at the 4.26 micron absorption band of carbon dioxide gas and the other pass band is located at 2.20 microns at which none of the atmospheric gases has an absorption band. The latter channel serves as a reference and renders the detector immune to false alarms caused by dust or smoke particles in the air or due to deterioration of certain components. The fire detector makes use of a sample chamber that consists of a serpentine passage in a block of material, the walls of the serpentine passsage being highly reflective so as to act as a light pipe.

REFERENCES:
patent: 4177381 (1979-12-01), McClatchie et al.
patent: 4499379 (1985-02-01), Miyatake et al.
patent: 4501068 (1985-02-01), Ebi et al.
patent: 4647777 (1987-03-01), Meyer

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1897184