External burner shut-off

Details External burner shut-off External burner shut-off

1998-09-29

2000-10-03

Fleming, Fritz

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

431 73, 307140, F23N 524

Patent

active

06128176&

ABSTRACT:
The present invention provides an external burner shut-off for oil fired heating systems. More specifically, the present invention provides a burner control circuit interrupt for a burner control circuit. The interrupt includes a pair of switches controlled by a relay coil. One of the switches opens the power supply to the burner control circuit and the other switch provides power to a timer circuit of the interrupt. The timer circuit counts down from a predetermined time to allow sludge in an oil holding tank to resettle after an oil delivery. The interrupt provides a fail-safe feature to insure that the burner control circuit is not inadvertently interrupted.

REFERENCES:
patent: 3976421 (1976-08-01), Lee et al.
patent: 4610294 (1986-09-01), Anesi et al.

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