Fuel control system, parts therefor and methods of making and op

Details Fuel control system, parts therefor and methods of making and op Fuel control system, parts therefor and methods of making and op

1994-11-16

1996-11-26

Dority, Carroll B.

Combustion

Timer, programmer, retarder or condition responsive control

Sensor of electrical condition or temperature of electrical...

431 72, 431 46, 431 78, F23N 500

Patent

active

055779050

ABSTRACT:
A fuel control system, parts therefor and methods of making and operating the same are provided, the fuel control system comprising an ignition unit for igniting fuel issuing from a burner, and a flame detecting unit for detecting flame at the burner, the flame detecting unit comprising a sensing device for receiving an electrical signal caused by flame rectification at the burner, and an output device for cycling the signal to the sensing device in an on and off manner in each cycle of operation of the output device, the control system having a modulating unit for modulating the on time and the off time of the output device in each cycle of operation thereof.

REFERENCES:
patent: 4836770 (1989-06-01), Geary
patent: 4856983 (1989-08-01), Geary
patent: 4871307 (1989-10-01), Harris et al.
patent: 4971549 (1990-11-01), Geary
patent: 4976605 (1990-12-01), Geary
patent: 5141431 (1992-08-01), Geary
patent: 5209655 (1993-05-01), Geary
patent: 5348466 (1994-09-01), Momber

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