Apparatus for detecting the passage of glowing embers

Details Apparatus for detecting the passage of glowing embers Apparatus for detecting the passage of glowing embers

1978-08-03

1980-11-11

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250554, H01J 4014

Patent

active

042335043

ABSTRACT:
An infrared detector of sufficient sensitivity and stability to provide for the reliable detection of a glowing ember moving through an enclosed carrier system (duct or conveyor) in which a photo-resistive device for viewing the interior of the carrier is connected into suitable circuitry that does not respond to slowly changing ambient light, but which produces a voltage pulse in response to a moving glowing ember passing through the field of view of the detector; said voltage pulse being utilized to provide an output signal which may actuate an alarm or release extinguishant.

REFERENCES:
patent: 3751667 (1973-08-01), Quittner
patent: 3811046 (1974-05-01), Levick
patent: 3867628 (1975-02-01), Brown
patent: 4032777 (1977-06-01), McCaleb
patent: 4039844 (1977-08-01), MacDonald

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