Photoelectric control device for gas burners

Details Photoelectric control device for gas burners Photoelectric control device for gas burners

1977-09-28

1979-04-24

Favors, Edward G.

Combustion

Mixer and flame holder

Bunsen burner type

126234, 126238, 431 79, F23D 1340

Patent

active

041509412

ABSTRACT:
A device for photoelectrically starting and stopping the operation of a bunsen burner in response to the shadow of an operator's hand holding an object to be heated includes a solenoid valve in a line supplying gas to the burner and electronic control circuitry having secondary and primary photoelectric cells arranged in a differential response circuit. Changes in the intensity of the ambient light are cancelled by the differential response circuit, while a hand shadow, which affects only the primary cell, triggers the solenoid valve, via a gate circuit and solenoid switch.

REFERENCES:
patent: 736321 (1903-08-01), Walther
patent: 3188836 (1965-06-01), Kniebes
patent: 3723045 (1973-03-01), Reese
patent: 4028047 (1977-06-01), Strunz et al.

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