Abstract: A temperature control system for a gas-fired appliance which uses a thermoelectric device to develop power for recharging a primary energy source, such as a rechargeable battery. The present invention provides a reliable and efficient system for controlling and powering a temperature control system.

Abstract: An apparatus for extinguishing undesired flames in liquid fuel-burning heaters having a wick partially disposed in a fuel supply reservoir in fluid communication with a fuel tank said apparatus comprising fuel flow cut-off means for interrupting said fluid communication in response to sensing excessive heat and wick withdrawal means for retracting said wick entirely into said wick fuel supply reservoir in response to sensing of excessive heat.

Abstract: A hydronic type of heating system is operated by a burner control system that relies on measuring the boiler water temperature and comparing the temperature change with a rate of rise set into a burner control means to determine whether the boiler is being properly operated. This system allows for heating the boiler water to a sufficient temperature before circulating the water through the heat exchange means to thereby prevent condensation on the outside of the boiler heat exchanger to eliminate rusting.

Abstract: A manual main shutoff valve for a gas burner combination control of the type having a casing which includes a housing plate in overlying relation to a partition plate. An axially movable valve member is spring biased to a closed position seated on a valve seat portion of the partition plate. A rotary valve actuator carried by the housing plate includes a cam member in engagement with the cam follower of an operating lever which is pivotally mounted in the casing and operatively connected to the valve member for moving the valve member to an open position in response to rotation of the valve actuator to an "ON" position.

Abstract: A control system for a damper installed in the exhaust flue of a furnace, by which activation of the furnace is rendered impossible unless the damper is in its fully open position. The control system achieves that objective by making completion of the energizing circuit of the solenoid that controls flow of fuel to the burner dependent upon closure of a normally open switch that is closed by the movement of the damper to its open position, and by opening the damper with an electric motor that is controlled by a relay energized in response to a call for heat at the thermostat.

Abstract: There is disclosed a safety control for a pulse combustion system. In a pulse combustion process, a combustible fuel and air are introduced into a combustion chamber through check valves in pulses and ignite to generate an alternating sinusoidal pressure wave. The control system of the invention comprises rectifying the sinusoidal pressure wave to obtain therefrom a differential pressure signal and applying the pressure signal to a control circuit to position a valve in the combustible fuel supply. Any interruption in combustion within the chamber causes a cessation of the differential pressure signal and closes the control valve.

Abstract: A thermostat is arranged to be responsive to the temperature of flue gases from an oil burning heater and actuates switches when the temperature of the flue gases reaches either a predetermined high value or a predetermined low value. The switches are effective, when actuated by the thermostat, to cut off flow of oil to the burner, either by stopping operation of a pump or by effecting closing of a valve in the oil supply conduit. The thermostat is provided with a latch that holds it in the high temperature position, when that position has been reached so that cooling of the flue gases thereafter will not result in resumption of oil flow to the heater. In one form of the invention the same circuit arrangement can be adapted to control either a pump-fed heater or a gravity-fed heater.

Abstract: A control unit for a gas-fired appliance comprises a service tap that acts also as a flame failure device. The flame failure device controls gas flow to a gas governor which is an integral part of the unit and associated with the gas governor is a low gas pressure cut-off. The unit also incorporates a modulating gas flow control valve operatively coupled to a thermostat which, in the case of a gas-fired water heater, is responsive to water temperature in the heater. When used with a water heater, the unit also includes a further thermostat set to terminate gas flow in the event that a predetermined maximum water temperature is exceeded.