Safety recycling system for a heater

Claim 2

A control system for an oil-burning heater having an electric ignition system, an ignition circuit including an ignitor switch and an auxiliary switch in series, a safety circuit including a solenoid and an automatically resettable normally closed limit switch in series with the solenoid operable in response to an excessive operating temperature in the heater, a control linkage including a control member having a first position to open the auxiliary switch and a second position permitting said switch to close, said solenoid, when energized, holding said control member in the second position, and means urging the control member to the first position whereby the action of the auxiliary switch is dependent upon the state of the solenoid.

Claim 3

A control system as defined in claim 1 including a fuel control valve, means including a movable pin for opening and closing said valve, and a movable operating member coacting with said pin and said control linkage whereby the control member in the first position causes the operating member to depress the pin and close the valve and in the second position releases the operating member permitting movement of the pin to open the valve whereby the valve and ignition circuit are conditioned for operation when the limit switch is closed and the solenoid is energized.

Claim 4

An electric ignition system for an oil heater with a safety circuit for fuel shutoff and providing recycling with automatic reignition of fuel for use as an attachment to a fuel supply system having a casing with a manually settable fuel control valve and a pin movable in response to the fuel flow setting and depressible to terminate fuel flow comprising, a normally closed Automatically resettable limit switch operable in response to an excessive heater temperature, a frame attachable to said body and carrying an auxiliary switch in series with an ignitor switch, a pivoted operating arm for the auxiliary switch having a length to overlie said pin whereby said pin and auxiliary switch operate substantially together, a control member on said frame, means urging said control member to a first position, a solenoid on said frame which pulls said control member to a second position and which is in series circuit with said limit switch, and a pivoted lever acting between said control member and said operating arm to have the operating arm open said auxiliary switch and depress said pin when the solenoid is deenergized and the control member is in the first position, the operating arm closing said switch and permitting elevation of the pin when the solenoid is again energized.

Claim 5

An electric ignition system for an oil heater with a safety circuit for fuel shutoff and providing recycling with automatic reignition of fuel for use as an attachment to a fuel supply system having a casing with a manually settable fuel control valve and a pin movable in response to the fuel flow setting and depressible to terminate fuel flow comprising, a normally closed Automatically resettable limit switch operable in response to an excessive heater temperature, a frame attachable to said body and carrying an auxiliary switch in series with an ignitor switch, a pivoted operating arm for the auxiliary switch having a length to overlie said pin whereby said pin and auxiliary switch operate substantially together, a control member on said frame, means urging said control member to a first position, a solenoid on said frame which pulls said control member to a second position and which is in series circuit with said limit switch, and a pivoted lever acting between said control member and said operating arm to have the operating arm open said auxiliary switch and depress said pin when the solenoid is deenergized and the control member is in the first position, the operating arm closing said switch and permitting elevation of the pin when the solenoid is again energized.

Claim 6

A recycling safety system for a fuel-burning heater having an electric ignition circuit and a variable-rate fuel supply controlling valve having a movable member to control the opening thereof comprising, an auxiliary switch in said ignition circuit, means responsive to either a power failure or to an excessive operating temperature within the heater to close said valve and open said ignition circuit and responsive to a presence of power and a proper operating temperature within the heater to open said valve to the previously set rate and close said ignition circuit including an operating arm movable to act on both said movable member and said auxiliary switch, a control linkage normally urged to a position to place said operating arm in a position to close the valve and open the auxiliary switch, and a solenoid which, when energized, holds the control linkage out of action.

Claim 7

A recycling safety system for a fuel-burning heater having an electric ignition circuit and a variable-rate fuel supply controlling valve having a movable member to control the opening thereof comprising, an auxiliary switch in said ignition circuit, means responsive to either a power failure or to an excessive operating temperature within the heater to close said valve and open said ignition circuit and responsive to a presence of power and a proper operating temperature within the heater to open said valve to the previously set rate and close said ignition circuit including an operating arm movable to act on both said movable member and said auxiliary switch, a control linkage normally urged to a position to place said operating arm in a position to close the valve and open the auxiliary switch, and a solenoid which, when energized, holds the control linkage out of action.