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| Number | Title | Issue Date |
| 7690916 | Method and apparatus for operating a gas-powered cooking and frying device A method and an apparatus for operating a gas-powered cooking device including an actuator for moving a closure disposed in the gas feed conduit of a burner to an open state and of igniting gas emitted from the burner by an ignition electrode to form a burner flame,... | 04/06/2010 |
| 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 |
| 7380588 | Heat pump control system and method of operating to provide automatic backup heating modes A heat pump type heating and air conditioning system includes a gas furnace or other auxiliary heat source and a thermostat and controller associated with the heat pump and the auxiliary heat source for automatically energizing the heat pump if the auxiliary heat so... | 06/03/2008 |
| 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 |
| 7314370 | Automated operation check for standing valve A method of verifying proper operation of an electromagnetic valve. The method includes providing a mechanism to effect opening of the valve, verifying that the valve opened as a result of employing the mechanism to effect opening of the valve and after verifying th... | 01/01/2008 |
| 7255285 | Blocked flue detection methods and systems The present invention is directed at systems and methods for detecting flue blockages in an HVAC system without the addition of numerous additional sensor elements, wiring, and connections that can unduly increase the cost and possibly reduce the reliability of the ... | 08/14/2007 |
| 7241135 | Feedback control for modulating gas burner A modulating gas burner control system using closed loop feedback from a flame rod which provides a signal that varies with gas pressure and which provides combustion air fan control to accurately control the heat from the system without use of expensive control val... | 07/10/2007 |
| 7238020 | Device for controlling hydrogen flow of hydrogen storage canister A control device for controlling hydrogen flow of a hydrogen storage canister accommodated in a canister containing chamber includes a heating device which is connected to a heating fuel storage tank via a heating fuel supplying pipeline for conveying a heating fuel... | 07/03/2007 |
| 7229278 | Flame quality and fuel consumption monitoring methods for operating a primary burner A control system for controlling an oil or gas burner heating system comprises an ultraviolet flame sensor. Flame is detected and preanalyzed by the control for flame quality factors reflecting the degree of drift from optimal operating conditions including the aver... | 06/12/2007 |
| 7088253 | Flame detector, method and fuel valve control A flame detector and burner fuel valve control has an ultraviolet sensitive, cold cathode, gas discharge tube in a DC quench circuit. In the presence of a flame, the circuit generates a pulse signal at a frequency related to the intensity of radiation from the flame... | 08/08/2006 |
| 7044729 | Gas burner control for a bake oven The system (1) for controlling the combustion (7) of a cooking oven burner (2), comprises in combination a thermostat valve (3) with a rotary hand knob (4) and a non-electric temperature sensor (6) for modulating the burner ... | 05/16/2006 |
| 7008217 | Safety device for boiler comprising a time delay protected by an electronic circuit A safety device for an industrial boiler (CHA) including electromechanical relays (REn, RS), which are connected in series in order to form an electromechanical safety chain (CH1), and at least one shunt relay (RTn) which is normally ope... | 03/07/2006 |
| 6942482 | Combustion control device A safety circuit 31, which compulsorily closes an on-off valve for supplying a gas to a burner when a microcomputer for performing a combustion control is in an abnormal condition, does not operate unless abnormality occurs to the microcomputer 1, and ... | 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 |
| 6666676 | Programmable burner for gas stoves A programmable burner for gas stoves, which is constituted by a gas burner and a safety valve that includes a thermocouple, which is located in coincidence with an external edge of the burner. The safety valve is maintained open when the thermocouple is d... | 12/23/2003 |
| 6572364 | Combustion control apparatus A conventional watchdog timer circuit is arranged to judge a microcomputer to be normal as long as a pulse signal is being outputted from the microcomputer. Therefore, an abnormal condition cannot be detected when an operating frequency of the microcomput... | 06/03/2003 |
| 6439878 | Apparatus for controlling combustion device When an error occurs to a combustion device, a microcomputer inside a control apparatus for the combustion device closes a safety valve thereby stopping gas supply to a gas burner. In a conventional control apparatus, when a power source resetting is actu... | 08/27/2002 |
| 6050807 | Method and apparatus for controlling an amount of air of a gas boiler A method and an apparatus for controlling an amount of air of a gas boiler are disclosed. Detecting section detects a flame voltage of the gas boiler to output a flame voltage value signal which represents a flame voltage value. An air supplying fan suppl... | 04/18/2000 |
| 5990798 | Atomic absorption photometer with a safety monitor An atomic absorption photometer includes a microprocessor which is programmed so as to affirmatively create an unsafe condition by lowering the pressure inside the flow route of a combustion improving gas and to check if the gas switch in this flow route ... | 11/23/1999 |
| 5957679 | Gas fireplace burner control system A direct spark ignition control system is provided for controlling for a gas fireplace burner. A solenoid is operatively controlled for supplying gas to the gas fireplace burner. A high voltage spark ignition circuit is operatively controlled for generati... | 09/28/1999 |
| 5863194 | Interrogation of multiple switch conditions Arrangement for interrogating multiple switch conditions employs a single input microprocessor for a plurality of switch elements that are coupled in series with an operating element and a power source. A variable oscillator has a control input and an out... | 01/26/1999 |
| 5812061 | Sensor condition indicating system A sensor provides a status signal indicating a condition of an operating system to the operating system's control system. The sensor has an inherent variable quantity such as resistance whose magnitude indicates the operating system status. The control sy... | 09/22/1998 |
| 5775236 | Combustion control circuit of combustion apparatus There is disclosed a combustion control circuit of a combustion apparatus with a driving signal generator, an exhaust fan controller and a gas valve controller, including: a combustion state detector for detecting the state of combustion occurring within ... | 07/07/1998 |
| 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 |
| 5599180 | Circuit arrangement for flame detection A circuit arrangement for flame detection for a transistor coil ignition system of a burner is disclosed. The transistor coil ignition system features a trigger stage which triggers a power transistor that is located in the power circuit of the primary wi... | 02/04/1997 |
| 5506569 | Self-diagnostic flame rectification sensing circuit and method therefor An electric control is shown for gas furnaces which controls fan motors and ignition controls based on inputs from a room thermostat (32), a high limit control and an ignition control (14) including a gas valve. A flame sense circuit (42, 42') is coupled ... | 04/09/1996 |
| 5470223 | Microprocessor controlled fuel and ignition control for a fuel burning device A primary control unit and ignitor using a microprocessor for fuel and ignition control and intelligent flame monitoring of a fuel burning device such as kerosene fired heaters. The control unit will function with a voltage supply ranging from 30 to 264 v... | 11/28/1995 |
| 5439374 | Multi-level flame curent sensing circuit A circuit for producing signals representative of at least two flame current levels is disclosed herein. The circuit includes two electrodes locatable in a flame, where a voltage potential is set up between the electrodes, and the current flow is measured... | 08/08/1995 |
| 5277575 | System and method for controlling the operation of a primary burner Disclosed is an electronic control system for controlling the operation of an oil burner heating system. The control system comprises a relay circuit having first and second relays. When the relays are closed, an external power source is connected to an i... | 01/11/1994 |
| 5236328 | Optical flame detector performance tester A burner control system periodically tests for and detects an out of range signal level from a flame sensor in the burner. When the system is in standby operation where no flame is present, the control system checks whether the flame signal level is withi... | 08/17/1993 |
| 5121880 | Mode selector for a heating system controller A heating system controller is suitable for controlling a heating system based on a plurality of sensed control signals representing control parameters. The heating system controller has a first input suitable for being coupled to provide a control signal... | 06/16/1992 |
| 5076780 | Digital controller component failure detection for gas appliance ignition function A digital control system, for a gas-fired, forced combustion air heating appliance, controls operation of a combustion air blower and a gas valve as a function of essentially square wave input signals derived from a thermostat, a combustion air proving se... | 12/31/1991 |
| 5074780 | Control system for forced combustion air heating appliance A control system, for a gas-fired, forced combustion air heating appliance, controls operation of a combustion air blower and a gas valve as a function of signals from a thermostat, a combustion air proving sensor switch, and a gas valve control relay. Wh... | 12/24/1991 |
| 5063527 | Monitor system A monitor system for safety critical situations such as burner control receives at inputs 17-21 control information from a programmable logic control and reference information at inputs 12-16 from plant interlocks. This information passes via opto-isolato... | 11/05/1991 |
| 5055825 | Method and circuit for self-checking troubles of a heating system A method and circuit for self-checking problems in a heating system for an automobile are disclosed. A self-checking and indicating process are disclosed which include a first preheating step; an ignition period; a second preheating step; a combustion per... | 10/08/1991 |
| 5037292 | Heater for motor vehicle Flame monitoring is normally performed in a space heater for a motor vehicle in order to stop the fuel supply within a certain period of time in the case of interruption of the flame. If interruption of the flame is detected by measuring the temperature o... | 08/06/1991 |
| 5035607 | Fuel burner having an intermittent pilot with pre-ignition testing A fuel burner includes an electrical igniter which lights a pilot burner which then lights the main burner. Operation of each of these steps is monitored, and if any are improper, the control device reverts to lighting the pilot burner with the main burne... | 07/30/1991 |
| 5026270 | Microcontroller and system for controlling trial times in a furnace system A microcontroller and system allowing for more than one trial time in a furnace system, while using only one pin of the microcontroller. An alternating current signal at an input port of the microcontroller causes the microcontroller to allow a first long... | 06/25/1991 |
| 4975683 | Cosmic radiation fault detection system An optical fire detection system that uses cosmic radiation or a radioactive source to test whether the ultraviolet light detector tube operates properly and includes self test logic to independently verify that the detector electronics are functioning pr... | 12/04/1990 |
