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| Number | Title | Issue Date |
| 7438023 | Heating device having a thermal cut-off circuit for a fuel line and method of operating the same A thermal cut-off circuit for a gas-fired device and method of operating the circuit. The thermal cut-off circuit includes a thermal cut-off switch and an ambient thermal switch. The thermal cut-off switch is positioned in a combustion chamber and the ambient therma... | 10/21/2008 |
| 7090140 | Method and device for monitoring burners The invention relates to a device and a method for monitoring burners using an automatic heating machine (1) for controlling or regulating the burner (15), and a temperature controller (5). At least the flow/boiler temperature (T?VL?) is detecte... | 08/15/2006 |
| 6981650 | Pool/spa heater A pool/spa heater having a temperature control portion which is connectable to an external temperature regulating controller, in which the temperature control portion has at least one primary temperature limiting control switch with a first temperature setpoint, at ... | 01/03/2006 |
| 6976636 | Heater having over temperature shut off control A heater is provided with an accurate shutoff device that shuts off (de-energized) the heater upon detecting an over temperature condition. The heater includes a body for holding material (water) to be heated and a first heating element coupled to the body for heati... | 12/20/2005 |
| 6965815 | Spa control system An improved spa control system is disclosed. The invention describes a spa control system which calculates the time required to heat the water in the spa system to a desired temperature. From that information, the heating rate of the spa system can be determined, an... | 11/15/2005 |
| 6059195 | Integrated appliance control system A fully integrated electronic appliance controller for controlling the operation of a appliance (e.g., a gas-fired water heater or boiler). The controller includes an integrated intelligent control system; enhanced safety features including an igniter cur... | 05/09/2000 |
| 6024290 | Fluid tempering system A fluid tempering system for supplying tempered fluid to hot fluid distribution system, for example water at a constant temperature by controlling the amount of cold water from the cold water supply mixing with hot water from the water heater, to control ... | 02/15/2000 |
| 5967766 | Heater control system and methods of making A heater control system, parts therefor, and methods of making them are disclosed. The heater control system includes a fuel control unit having a thermocouple operated unit in the housing thereof, which has an opening therein leading to the thermocouple ... | 10/19/1999 |
| 5947111 | Apparatus for the controlled heating of process fluids An apparatus for the controlled heating of a process fluid has a heater, a process fluid vessel containing the process fluid, and a bundle of thermosyphons extending between a burner chamber of the heater and the process fluid inside the vessel for transf... | 09/07/1999 |
| 5788148 | Vehicle heating appliance with overheating checking device In a vehicle heating appliance, an overhead state is detected by an overheating temperature sensor by means of a microprocessor. The overheating temperature sensor supplies a signal (UTF) to the microprocessor, and when the signal (UTF) exceeds a threshol... | 08/04/1998 |
| 5685481 | Trip-free high limit control A trip-free high limit control for a water heater having a source of heat to heat the water. A switch arm is mounted in a control housing for movement in the housing. The switch arm has a first contact portion at one end thereof. A second stationary conta... | 11/11/1997 |
| 5586719 | Control system for a hot water tank construction, control device therefor and methods of making the same A control system for a hot water tank construction, control device therefor and methods of making the same are provided, the control system comprising a switch unit that has a portion thereof disposed remote from a housing of a control device and in a pos... | 12/24/1996 |
| 5312036 | Instantaneous water heater which includes safety devices separately or in combination to prevent the explosion of the heat exchanger in the event of an excessive heating of the water in the heating coil and to shut-off the flow of gas to the burner The invention provides an instantaneous water heater which includes safety devices separately or in combination to prevent the explosion of the heat exchanger in the event of an excessive heating of the water in the heating coil and to shut-off the flow o... | 05/17/1994 |
| 5261598 | Safety device for a combustion apparatus A safety device for a combustion apparatus comprises a continuous, linear temperature-sensing element formed of a material which is electrically conductive and melts, or breaks, at a relatively low temperature and located along at least one side of a comb... | 11/16/1993 |
| 5125068 | Apparatus for controlling heating of fluids utilizing adjustable temperature set point A temperature control device for a fluid heating vessel senses ambient temperature and controls or adjusts the set point at which power is reduced to an element for heating the fluid in the heating vessel, in order to prevent boil-over of the fluid. The T... | 06/23/1992 |
| 5092519 | Control system for water heaters A control system for a gas water heater including a fuel rate control valve, a water flow switch to control the fuel rate valve, an inlet water temperature switch to reduce fuel flow when inlet temperature is high, a temperature switch at the water outlet... | 03/03/1992 |
| 5023432 | Programmable hot water heater control device A hot water heater control device and method for a building such as a home will allow the consumer user maximum savings with a modest investment by allowing the user to program into a control module a particular living cycle and assign a desired temperatu... | 06/11/1991 |
| 4750452 | Water heater An instantaneous hot water heater having a coiled heat exchanger (4) through which water to be heated passes. A fuel supply assembly (22) is provided for supplying air and gas to the interior of the exchanger for combustion in such a way that combustion o... | 06/14/1988 |
| 4690324 | Oil burner control for hydronic system An integrated oil burner control and hydronic limit control arrangement is disclosed. A single transformer energizes the oil burner control and all of the equipment necessary to both operate an oil burner and a circulator pump. This type of device can be ... | 09/01/1987 |
| 4599992 | Anticipatory thermostat with reset for domestic hydronic boiler control A hot water heating system for a building has a hot water storage tank, a combustor, a burner for firing the combustor, a plurality of radiators, a pump for circulating hot water to and from the plurality of radiators, a first thermostat for measuring the... | 07/15/1986 |
| 4492092 | Combination refrigerant circuit and hot water preheater A combination refrigeration circuit and hot water preheater is disclosed. Specific temperature sensing arrangements in combination with a bypass circuit and a continually operating pump are disclosed to obtain effective control of the hot water preheating... | 01/08/1985 |
| 4470541 | Control system for low mass hydronic boilers A control system for a low mass hydronic boiler is disclosed which includes a sensor for measuring the temperature of the fluid exiting the boiler. The level of fuel flow provided to the boiler is reduced when the water temperature exceeds a predetermined... | 09/11/1984 |
| 4361274 | Electronic temperature control An electronic temperature control circuit is disclosed for use with swimming pool and spa heaters. The circuit employs a thermistor for sensing water temperature, and provides temperature control with a narrow differential. Safety circuits are also employ... | 11/30/1982 |
| 3961156 | Combination temperature and pressure relief valve with energy cutoff switch A device for limiting the temperature and pressure of a fluid by controlling the electric current to a heating element. The device includes a cylinder connected with a tank in which the fluid is heated and includes a pressure responsive piston movable wit... | 06/01/1976 |
| 3948439 | Sediment buildup warning device for water heaters A safety shut down warning assembly of the manual reset or recycling type installed at the lower section of a water heater storage vessel inside or outside the wall of the storage tank of the vessel to sense a predetermined increase in temperature above t... | 04/06/1976 |
