Fire detection system employing at least one optical waveguide

Details Fire detection system employing at least one optical waveguide Fire detection system employing at least one optical waveguide

1987-07-28

1989-08-08

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

250554, 431 13, 431 79, G08B 1712

Patent

active

048557188

ABSTRACT:
A fire detection system has a detector for sensing optical radiation from a spark or flame or hot spot and an optical waveguide comprising an elongate hollow tube, having an inlet end portion for placement in a hostile, hazardous environment, and having an outlet end portion for emitting light rays to the detector and for placement in a benign, non-hazardous environment, and having a reflective inner surface forming a passage for transmitting the optical radiation from the tube inlet end portion to the tube outlet end portion by successive internal reflections.
The elongate hollow waveguide tube is sealed at the inlet end portion by a lens which admits the optical radiation to the tube; and at the outlet end typically by the detector. The sealed tube is filled with an inert gas, such as nitrogen, which helps to maintain the reflective interior surface of the tube.

REFERENCES:
patent: 3824391 (1974-07-01), Noltingk et al.
patent: 4432286 (1984-02-01), Witte
patent: 4701624 (1987-10-01), Kern et al.
patent: 4709155 (1987-11-01), Yamaguchi et al.

Affiliated with

Also associated with

Rating

Fire detection system employing at least one optical waveguide does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fire detection system employing at least one optical waveguide, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fire detection system employing at least one optical waveguide will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-908549