Heater safety control system

Details Heater safety control system Heater safety control system

1974-10-29

1976-03-02

Favors, Edward G.

Combustion

Timer, programmer, retarder or condition responsive control

By combustion or combustion zone sensor

F23H 510

Patent

active

039415538

ABSTRACT:
A safety control system for use on a heater which shuts off the heater fuel supply if the heater flame is not present within a predetermined time after initial ignition is attempted or after re-ignition is attempted should the flame be extinguished. A flame sensor which makes use of the electrical conductivity of the flame is employed with a solid-state switch, silicon controlled rectifier, and time delay relay to provide a fast response control circuit for shutting off the fuel supply valve in the absence of flame after a predetermined delay.

REFERENCES:
patent: 3630648 (1971-12-01), Hulsman
patent: 3689194 (1972-09-01), Das et al.
patent: 3847533 (1974-11-01), Riordam

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