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| Number | Title | Issue Date |
| 8057219 | Dual fuel vent free gas heater A dual fuel vent free gas heater having at least one gas burner with a plurality of gas outlet ports. The gas outlet ports are in flow communication with at least one pilot flame burner. At least one fuel injector feeds fuel to the burner providing for introduction ... | 11/15/2011 |
| 7927095 | Time varying voltage combustion control and diagnostics sensor A time-varying voltage is applied to an electrode, or a pair of electrodes, of a sensor installed in a fuel nozzle disposed adjacent the combustion zone of a continuous combustion system, such as of the gas turbine engine type. The time-varying voltage induces a tim... | 04/19/2011 |
| 7428901 | Cooking stove A cooking stove that prevents the execution of a process such as ignition of a burner when a touch switch changes from a non-sensing state to a sensing state. In STEP201, when a first touch switch, which is one of the touch switches provided in an operation, ... | 09/30/2008 |
| 7422010 | Cooking stove A cooking stove that prevents a burner from being ignited when a touch switch shifts from a non-sensing to a sensing state. An operation portion having a touch switch is provided on a glass top plate of a cooking stove main body which accommodates burners. The touch... | 09/09/2008 |
| 7370649 | Cooking stove A touch switch which prohibits a child from actuating heating means, while permitting a child to deactivate heating means. A cooking stove including an electrical capacitance operation switch 10 which switches the cooking stove between an operation state in w... | 05/13/2008 |
| 7288417 | On-chip signal transformer for ground noise isolation A mixed-signal chip having a signal transformer located between analog circuitry and digital circuitry. The signal transformer includes a primary winding electrically coupled to the analog circuitry and a secondary winding electrically coupled to the digital circuit... | 10/30/2007 |
| 7147462 | Pocket readout apparatus A readout apparatus that can be carried in the shirt pocket of a technician. The readout apparatus is used to easily and quickly make a connection to a heating system via a data access port of the heating controls, especially in low light situations, without the nee... | 12/12/2006 |
| 7148454 | Systems for regulating voltage to an electrical resistance igniter Systems and methods for energizing an electrical resistance igniter include determining the line voltage into the system and controlling the voltage being applied to the electrical resistance igniters so a first voltage is applied initially and for a time period and... | 12/12/2006 |
| 7048537 | Apparatus and method for controlling a variable fuel fired appliance An apparatus is provided for controlling a fuel fired heating appliance, the apparatus comprising a first processor for controlling the ignition operation of the furnace and a second processor for controlling the operation of a variable speed blower motor, wherein t... | 05/23/2006 |
| 6941869 | Sensor for monitoring electronic detonation circuits A voltage sensor (10) for monitoring electronic ignition circuits (1) which contains a plurality of igniters (4) connected to an ignition line (3) and an ignition device (2) connected to the ignition line (3) to program the ... | 09/13/2005 |
| 6923640 | Flame burner ignition system An ignition system includes a burner, a power supply, an electrical system including a ground conductor, and an ignition module. The ignition module includes a first input, a second input, and an output. The output is operatively coupled to the burner, while one of ... | 08/02/2005 |
| 6803544 | Ignitor distinguishing control system and method therefor A system and method for universal control of an ignitor within a gas appliance is disclosed. The system includes an ignitor distinguishing circuit in communication with the ignitor and having a signal representative of the ignitor current through the ignitor output ... | 10/12/2004 |
| 6521869 | System for powering an igniter to a level proven to ignite gas A microprocessor-controlled triac switching circuit for an igniter, having line voltage and igniter current input signals to a microprocessor for determining power to the igniter. Upon determining the line voltage, the microprocessor selects from a look-u... | 02/18/2003 |
| 6217312 | Ignition system for a gas appliance An ignition system for a gas appliance comprises an ignition controller that receives a current from a power source. The ignition controller is also coupled to an ignitor and to a current actuated valve that releases a flow of gas when the current is grea... | 04/17/2001 |
| 6099295 | Power phase regulator circuit improvement motor start switch self-adjusting preheat and ignition trial improvement and series-type voltage regulator improvement to hot surface ignition controller for fuel oil burner A fuel oil burner utilizing a hot surface ignition with an ignitor that is fully sintered and has essentially no porosity, a voltage phase regulator circuit for applying rectified half-wave AC line voltage, full-wave rectified AC, or either half-wave or f... | 08/08/2000 |
| 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 |
| 6039040 | Combined temperature limiter and ignition monitoring device for use in a cooking unit Apparatus for limiting the temperature of a cooking location of a type having an electrically conductive burner housing forming a heating chamber, includes a temperature sensor including an outer tube and an inner rod received within the tube, a switch ba... | 03/21/2000 |
| 6006167 | Gas burner monitor and diagnostic apparatus A gas burner operation monitoring apparatus for enabling convenient diagnosis of gas burner and control problems. The invention is a temporarily attached device that collects and stores information concerning the key functions indicative of a gas burner's... | 12/21/1999 |
| 5951276 | Electrically enhanced hot surface igniter An electronic control circuit (10) for a gas oven including a hot surface igniter (24) which is heated through the application of electrical current to a temperature sufficient to ignite gas supplied through an electrically actuable gas valve (26). The ap... | 09/14/1999 |
| 5941699 | Shutoff system for gas fired appliances Shutoff system for a gas fired appliance includes a shutoff for increased carbon monoxide concentration. A proximity sensor is associated with a thermocouple and conventional solenoid shutoff valve. Slight changes in the current resulting from temperature... | 08/24/1999 |
| 5899684 | Power phase regulator circuit improvement, motor start switch, self-adjusting preheat and ignition trial improvement, and series-type voltage regulator improvement to hot surface ignition control for fuel oil burner A fuel oil burner utilizing a hot surface ignition with an ignitor that is fully sintered and has essentially no porosity, a voltage phase regulator circuit for applying rectified half-wave AC line voltage, full-wave rectified AC, or either half-wave or f... | 05/04/1999 |
| 5804796 | Ignition system with resistance value difference fire extinction detection circuit In an ignition system for sensing a change in a resistance value during a combustion of a heating resistive element and detecting a fire extinction, a resistance value of the heating resistive element is sensed by a resistance value detecting circuit at a... | 09/08/1998 |
| 5775895 | Combustion-state detecting circuit of combustion apparatus There is disclosed a combustion-state detecting circuit of a combustion apparatus installed in a combustion chamber, including: a flame detector that has a heat-emitting device for emitting heat on application of an alternating current signal, and produce... | 07/07/1998 |
| 5761828 | Ignition and gas flow control for clothes drying machine The gas flow and ignition of gas in a gas fired clothes dryer is controlled by coupling a soft ferrite material radiatively to an igniter element and non-radiatively to a heat sink. The temperature assumed by the ferrite material is above its curie point ... | 06/09/1998 |
| 5761092 | Gas burner monitor and diagnostic apparatus A gas burner operation monitoring apparatus for enabling convenient diagnosis of gas burner and control problems. The invention is a temporarily attached device that collects and stores information concerning the key functions indicative of an gas burner'... | 06/02/1998 |
| 5725368 | System for providing rapid warm-up of electrical resistance igniter A system for enabling an electrical resistance igniter to attain ignition temperature within a few seconds and without exceeding a temperature which could damage the igniter. The system controls the level of power to the igniter based on the determined va... | 03/10/1998 |
| 5722822 | Flame sensor verification Method and apparatus are disclosed for checking the responsiveness of a circuit which senses the presence of a flame produced by a burner within a furnace. A programmed processor associated with the circuit measures the time the circuit takes to indicate ... | 03/03/1998 |
| 5720607 | Ignitor An ignitor includes a first transistor, a transformer, an ignition member, and a switching control member. The first transistor is activated in accordance with supply from a DC power supply to perform switching. The transformer has a primary winding throu... | 02/24/1998 |
| 5704775 | Auxiliary igniter and control for a furnace A furnace for combustible fuels that incorporates a main igniter and an auxiliary back-up igniter for igniting the fuel. When power is applied to the main igniter, a sensor detects whether or not current flows through the main igniter. If there is current... | 01/06/1998 |
| 5632614 | Gas fired appliance igntion and combustion monitoring system A gas fired appliance measures infrared emissions from a metal object heated in a combustion chamber to evaluate combustion. Associated circuitry uses the evaluation to control operational parameters of the appliance, including fuel and air fed to the app... | 05/27/1997 |
| 5612904 | Oil burner monitor and diagnostic apparatus An oil burner operation monitoring apparatus for enabling convenient diagnosis of burner problems. The invention has two major components: a permanently mounted or integral data collection unit that is connected to key points in the oil burner and a porta... | 03/18/1997 |
| 5577905 | Fuel control system, parts therefor and methods of making and operating the same A fuel control system, parts therefor and methods of making and operating the same are provided, the fuel control system comprising an ignition unit for igniting fuel issuing from a burner, and a flame detecting unit for detecting flame at the burner, the... | 11/26/1996 |
| 5567144 | Hot surface ignition controller for fuel oil burner A fuel oil burner utilizing a hot surface ignition with an ignitor that is fully sintered and has essentially no porosity, a circuit for applying AC line voltage to the ignitor and to a blower motor, an AC-to-DC converter for providing twelve volts DC for... | 10/22/1996 |
| 5528226 | Apparatus and method for controlling the burn-off operation of a gas in a semiconductor wafer fabrication furnace An apparatus and method for monitoring temperature and current in a gas ignition chamber by monitoring temperature in the gas ignition chamber, monitoring current flowing through first and second ignitors housed in the gas ignition chamber, comparing the ... | 06/18/1996 |
| 5515297 | Oil burner monitor and diagnostic apparatus An oil burner operation monitoring apparatus for enabling convenient diagnosis of burner problems. The device is connected to key points in the oil burner. The device records and stores information concerning the key functions indicative of an oil burner'... | 05/07/1996 |
| 5437548 | Fuel ignition system and method of making the same A fuel ignition system and method of making the same are provided, the system having a unit for detecting when an igniter has been heated to ignition temperature, the detecting unit comprising a receiving member for receiving at least some of the electron... | 08/01/1995 |
| 5435717 | Burner control system with continuous check of hot surface ignitor during run cycle A fuel valve and ignitor control system in which pull-in current for a fuel valve operating on rectified alternating current is supplied through a first normally open relay whose coil is connected in series with normally open contacts of a second relay an... | 07/25/1995 |
| 5403182 | Control system for gas fired heating apparatus using double-throw radiant heat sensing switch A control system for a gas fired heating apparatus which apparatus includes a burner, two gas valves and a hot surface igniter, and which control system includes a single-pole, double-throw radiant heat sensing switch having normally-closed contacts which... | 04/04/1995 |
| 5314328 | Fuel ignition system and method of making the same A fuel ignition system and method of making the same are provided, the system having a unit for detecting when an igniter has been heated to ignition temperature, the detecting unit comprising a receiving member for receiving at least some of the electron... | 05/24/1994 |
| 5300836 | Flame rod structure, and a compensating circuit and control method thereof A flame rod structure is comprised of a silicon alloy or is coated by a silicon material on a metal flame rod. A compensating circuit applies the A.C. bias to the D.C. bias of the flame rod structure, generates the excitation frequency signal and mixes th... | 04/05/1994 |
