Flame detector for use with a burner

Details Flame detector for use with a burner Flame detector for use with a burner

1985-11-20

1987-11-24

LaRoche, Eugene R.

Radiant energy

Photocells; circuits and apparatus

Flame light source

340578, 431 79, G08B 1712

Patent

active

047091550

ABSTRACT:
In a flame detector having an optical head, a plurality of light-taking optical fibers are arranged so as to provide different directions of fields of vision at their front ends. Therefore, the watching regions of burner flame has been widened, and even if the primary combustion zone moves back and forth with respect to the tip of the burner due to the change in load, the flame can be accurately detected providing high reliability. Junction optical fibers and wiring optical fibers are separately provided in addition to the light-taking optical fibers. Therefore, when one or more optical fibers are damaged, only the damaged optical fibers are required to be replaced with new ones providing cost reduction in maintenance. Two or more photosensitive elements having different sensitive wavelength regions are used. Therefore, various types of flames having various wavelengths can be effectively detected providing wider detection range when compared with conventional apparatus.

REFERENCES:
patent: 3689773 (1972-09-01), Wheeler
patent: 4328488 (1982-05-01), Yanai et al.
patent: 4370557 (1983-01-01), Axmark et al.

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