Of Shutdown By Response To Sensed Combustion Failure Or Overheat Patents (Class 431/77)
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Patent number: 11815781Abstract: One embodiment provides an apparatus for displaying an image comprising: a first optical substrate comprising at least one waveguide layer configured to propagate light in a first direction, wherein the at least one waveguide layer of the first optical substrate comprises at least one grating lamina configured to extract the light from the first substrate along the first direction; and a second optical substrate comprising at least one waveguide layer configured to propagate the light in a second direction, wherein the at least one waveguide layer of the second optical substrate comprises at least one grating lumina configured to extract light from the second substrate along the second direction, wherein the at least one grating lamina of at least one of the first and second optical substrates comprises an SBG in a passive mode.Type: GrantFiled: May 3, 2022Date of Patent: November 14, 2023Assignees: Rockwell Collins, Inc., Digilens Inc.Inventors: Robert D. Brown, Alastair John Grant, Wyatt L. Hendrick, Milan Momcilo Popovich, James H. Stanley, Jonathan David Waldern
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Patent number: 8836522Abstract: A safety shut-off system and method for eliminating power to a load in the event of smoke detection. The system may comprise a device located at the appliance for detecting a signal from a smoke detector, and cutting power to the appliance only when the appliance is in use. The device may be synchronized with any standard smoke alarm signal to reduce the number of false positive shut-offs. The system may also comprise a smoke alarm hard-wired to a circuit breaker, for shutting off power to all appliances on a particular breaker upon receipt of a signal from the smoke alarm, and only when the appliances on the breaker are in use. The system may also have the ability to shut off one breaker, multiple breakers, or all breakers at different time increments to actively prevent and reduce the damages caused by fires.Type: GrantFiled: September 4, 2012Date of Patent: September 16, 2014Assignee: Fire Avert, LLCInventors: Peter Thorpe, Michael Sanders, Chase Roberts, Kevin Sanders, Zack Bomsta
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Publication number: 20140212821Abstract: A flame-emitting apparatus is provided, whereby a burner has an inlet connected to a fuel source. Fuel burned by the burner provides a flame extending from an outlet of the burner. A flame ignition system detects the presence of the flame during operation of the apparatus and controls supply of fuel to the burner in response to flame detection.Type: ApplicationFiled: March 28, 2014Publication date: July 31, 2014Inventors: Cristian Mitori Banu, Jean Francis Defoy, Nitai Friedman
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Publication number: 20140170574Abstract: Systems and methods for detecting an instability associated with at least one burner are disclosed. A detector measures a signal associated with a characteristic of the at least one burner. The signal is converted to a time-varying signal spectrum using at least one processor. An instability is detected based at least in part on the time-varying signal spectrum. The instability can be detected based on an instability indicator calculated based at least in part on the time-varying signal spectrum. A threshold can be associated with the instability indicator such that an instability is detected when the instability indicator is greater than the threshold.Type: ApplicationFiled: December 10, 2013Publication date: June 19, 2014Applicant: ExxonMobil Research and Engineering CompanyInventors: Weichang Li, Gary T. Dobbs, Limin Song, Duane R. McGregor, San Chhotray, Jeffrey M. Grenda, Amy B. Herhold
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Patent number: 8695621Abstract: A gas safety device is provided. An electronic valve connected to a thermocouple is closed to cut off the gas supply when the temperature of radiant heat directly emitted from a surface of a vessel exceeds a preset temperature level while the vessel is heated through the spark ignition of a burner, thereby preventing risks of overheating and thus fire caused due to a user's carelessness when the user cooks the food.Type: GrantFiled: May 13, 2011Date of Patent: April 15, 2014Assignee: En Innovation Co., Ltd.Inventor: Sung-Hyung Park
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Patent number: 8636502Abstract: A control system for a fuel-fired appliance and methods of operating are disclosed. When a failed ignition of a burner is detected, the control system is configured to enter a soft lockout state if the voltage level of a burner of the fuel-fired appliance is low during the failed ignition and a hard lockout state if the voltage level of the burner is not low during the failed ignition. In some cases, if a period of time has elapsed and/or the voltage level of the burner has increased after the control system enters the soft lockout state, the control system may be configured to initiate one or more subsequent ignition trials. In some cases, if the one or more subsequent ignition trials fail, the control system may be configured to then enter the hard lockout state.Type: GrantFiled: April 26, 2012Date of Patent: January 28, 2014Assignee: Honeywell International Inc.Inventor: Peter Anderson
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Patent number: 8469700Abstract: A system for predicting fouling and corrosion of a combustion system in an industrial process includes a pipe, a restrictive element, and a fouling and corrosion detector. The pipe contains a fuel. The restrictive element is coupled to the pipe and the fuel passes through the restrictive element. The fouling and corrosion detector is coupled to the pipe and is adapted to detect a characteristic signature of the restrictive element and to generate an alarm if a change in the detected signature exceeds a predetermined limit relative to a baseline signature.Type: GrantFiled: September 29, 2005Date of Patent: June 25, 2013Assignee: Rosemount Inc.Inventors: Marcos Peluso, Scott Eliason, Gregory C. Brown
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Patent number: 8333584Abstract: A fuel-fired appliance is shut down when a predicted steady state combustion chamber temperature is below a known threshold. The predicted steady state temperature is based on combustion chamber temperatures during heat up of the burner and appliance.Type: GrantFiled: May 31, 2006Date of Patent: December 18, 2012Assignee: Beckett Gas, Inc.Inventor: Richard D. Cook
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Patent number: 8297968Abstract: In certain embodiments, an apparatus can comprise a dual fuel pilot assembly. The pilot assembly can comprise a first fuel dispenser, a second fuel dispenser, an igniter and at least one of a thermocouple, and a thermopile. The pilot assembly can be configured to direct heat from combustion of one of either a first fuel or a second fuel to the at least one of the thermocouple and the thermopile.Type: GrantFiled: October 19, 2009Date of Patent: October 30, 2012Assignee: Continental Appliances, Inc.Inventor: David Deng
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Patent number: 8066508Abstract: A signal generation system for flame ignition and sensing. The ignition signal generation is adaptive for improving flame ignition while eliminating excess energy usage. High voltage signals for flame sensing may also be provided. If more energy or speed is needed for ignition signal generation, then the flame sensing signal generation portion may be disabled to increase the amount of available energy. Adaptation for ignition signal generation may be guided by the results of flame sensing. The flame sensing voltage may be regulated based on the flame current strength. The flame current may be controlled within an optimum range to reduce rod contamination rate and yet provide reliable flame sensing when the rod contamination built up. The adaptation may be algorithmic-based with the facilitation of a microcontroller. The system may provide the high voltage signals from a low voltage power supply, such as that of 24 VAC.Type: GrantFiled: May 12, 2005Date of Patent: November 29, 2011Assignee: Honeywell International Inc.Inventors: Timothy J. Nordberg, Brent Chian
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Patent number: 8057219Abstract: 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 of more than one fuel to the burner. Optionally, an oxygen detection system, manual control valve, linkage, and/or shut off control system may be incorporated into the dual fuel vent free heater.Type: GrantFiled: September 24, 2008Date of Patent: November 15, 2011Assignee: Coprecitec, S.L.Inventors: John Stephen (Steve) Manning, José Joaquín Antxia Uribetxebarria, Ruben Mateos Martin
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Patent number: 7927095Abstract: 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 time-varying current in the flame which is measured and used to determine flame capacitance using AC electrical circuit analysis. Flame capacitance is used to accurately determine the position of the flame from the sensor and the fuel/air ratio. The fuel and/or air flow rate (s) is/are then adjusted to provide reduced flame instability problems such as flashback, combustion dynamics and lean blowout, as well as reduced emissions. The time-varying voltage may be an alternating voltage and the time-varying current may be an alternating current.Type: GrantFiled: September 30, 2007Date of Patent: April 19, 2011Assignee: The United States of America as represented by the United States Department of EnergyInventors: Benjamin T. Chorpening, Jimmy D. Thornton, E. David Huckaby, William Fincham
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Patent number: 7891972Abstract: The aim of the invention is to create a gas regulating fitting which, once a gas stove has been successfully started up, can switch the pilot burner into the off position when the main burner is in the off position, in order to maintain the power consumption of the gas stove as low as possible. The aim of the invention is also to provide the gas regulating fitting with as simple a structure as possible. To this end, the gas regulating fitting comprises a sensor (34) by which means the operating state of the main burner (33) can be detected. The sensor (34) is connected to a thermoelectric safety pilot valve (17) in such a way that, when the operating state of the main burner (33) is switched from the on position into the off position by a signal emitted from the sensor (34), the thermoelectric safety pilot valve (17) assumes the closed position thereof. The gas regulating fitting can be used to ignite and to regulate a gas flow flowing to a burner.Type: GrantFiled: March 10, 2005Date of Patent: February 22, 2011Assignee: Mertik Maxitrol GmbH & Co. KGInventors: Jürgen Blank, Barbara Happe
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Patent number: 7854607Abstract: A control for controlling the operation of a fuel-fired heating appliance is provided that include a sensor capable of sensing the presence of carbon monoxide gas and providing an output indicative of the level of carbon monoxide gas. The control further includes a microprocessor that periodically reads the CO sensor output and stores at least one sensor output value in a memory, wherein the microprocessor responsively discontinues the operation of the appliance when the microprocessor detects a sensor output that has increased by more than a predetermined amount over at least one previously stored sensor output value. In one embodiment, the control is preferably configured to periodically read the sensor output value, and responsive discontinue operation of an appliance upon sensing a predetermined increase of at least a 50 percent increase over the previously monitored sensor output value over a period of about 15 to 90 minutes.Type: GrantFiled: June 16, 2009Date of Patent: December 21, 2010Assignee: Emerson Electric Co.Inventors: Donald E. Donnelly, Thomas J. Fredricks
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Patent number: 7695273Abstract: A furnace system responsive to a thermostat includes a pollutant sensor for sensing a pollutant concentration in the furnace system. The pollutant sensor is configured to open when the pollutant concentration reaches a pollutant threshold and close when the pollutant concentration falls below the pollutant threshold. When the thermostat is calling for heat, a furnace controller monitors the pollutant sensor and disables the furnace system for a lockout period if a lockout criterion related to the pollutant sensor is met.Type: GrantFiled: October 4, 2006Date of Patent: April 13, 2010Assignee: United Technologies CorporationInventor: Daniel J. Dempsey
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Patent number: 7581946Abstract: A control for controlling the operation of a fuel-fired heating appliance is provided that include a sensor capable of sensing the presence of carbon monoxide gas and providing an output indicative of the level of carbon monoxide gas. The control further includes a microprocessor that periodically reads the CO sensor output and stores at least one sensor output value in a memory, wherein the microprocessor responsively discontinues the operation of the appliance when the microprocessor detects a sensor output that has increased by more than a predetermined amount over at least one previously stored sensor output value. In one embodiment, the control is preferably configured to periodically read the sensor output value, and responsive discontinue operation of an appliance upon sensing a predetermined increase of at least a 50 percent increase over the previously monitored sensor output value over a period of about 15 to 90 minutes.Type: GrantFiled: November 2, 2005Date of Patent: September 1, 2009Assignee: Emerson Electric Co.Inventors: Donald E. Donnelly, Thomas J. Fredricks
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Publication number: 20090214994Abstract: A device for igniting combustible means, especially solid combustibles such as wood, charcoal, and similar. The device includes a pressurized receptacle that is filled with a combustible medium, a spring-loaded actuating valve which selectively opens and closes a discharge port of the receptacle, preferably by applying pressure with a fingertip, and a top part that is joined to the discharge port and has a tubular extension having an adequate length.Type: ApplicationFiled: April 3, 2006Publication date: August 27, 2009Inventor: Jonathan Gdynia
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Publication number: 20080108001Abstract: A gas appliance includes a pilot burner, one or more main burners, a solenoid valve coupled to the pilot burner and the main burners for controlling the pilot burner and the main burners, and a control circuit coupled to the solenoid valve for controlling the solenoid valve to operate the pilot burner or the main burner remotely. An igniting device may be coupled to the control circuit for being operated by the control circuit to selectively ignite the pilot burner. One or more batteries may be coupled to the control circuit for energizing the control circuit, and a thermo-couple may be coupled to the control circuit for selectively energizing the control circuit when the battery is out of electricity.Type: ApplicationFiled: November 7, 2006Publication date: May 8, 2008Inventor: Hsin Ming Huang
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Patent number: 7118613Abstract: A control unit for controlling operation of a fuel-fired burner includes a housing having an air inlet which is open to an interior chamber of the housing. An air pump is positioned in the interior chamber of the housing and has an air inlet which is open to the interior chamber of the housing. The air pump generates reduced air pressure in the interior chamber which draws air into the housing and into the pump's inlet. This flow of air cools an electronic controller along with other components position in the housing. The air pump may be operated to draw air from the interior chamber of the housing and supplies the air to a combustion chamber of the fuel-fired burner to facilitate operation of the burner. An associated method of advancing air to a fuel-fired burner is also disclosed.Type: GrantFiled: August 31, 2004Date of Patent: October 10, 2006Assignee: Arvin Technologies, Inc.Inventors: Wilbur H. Crawley, Randall J. Johnson
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Patent number: 7025810Abstract: A method of operating a fuel-fired burner of an emission abatement assembly includes supplying a reduced amount of fuel to the fuel-fired burner in response to detection of a burner shutdown request. Such a reduced fuel supply continues for a predetermined time period after which fuel is no longer supplied to the burner. The supply of both combustion air and atomization air, along with spark generation, continues for a period of time after the fuel is shutoff. An emission abatement assembly is also disclosed.Type: GrantFiled: August 31, 2004Date of Patent: April 11, 2006Assignee: Arvin Technologies, Inc.Inventors: Wilbur H. Crawley, Randall J. Johnson
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Patent number: 7018200Abstract: The apparatus (1,1?) for the detection of gas combustion in an domestic gas heater or a water heater is designed as an independent installation unit mounted on a shared support bracket (8,8?), provided with a thermoelectric generator assembly (4–6, 20–26) for supplying a safety valve (16) and a main gas valve (17) of the gas heater, generating two respective lower (Vb) and higher (Vd) voltages therefor. The thermoelectric assembly (4–6,20–26) heated by a pilot flame (3) is built up by means of one or two flat Peltier type p-n junction cells (4, 20–21), which are connected to a heat transmission element (5,25) licked by the pilot flame (3) and to a shared heat sink (6,22).Type: GrantFiled: November 10, 2003Date of Patent: March 28, 2006Assignee: Fagor, S. Coop.Inventors: Félix Querejeta, José J. Anttxia
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Patent number: 6964248Abstract: A gas-fired water heater is provided with a combustion shutoff system which precludes further combustion within the water heater's combustion chamber in response to a combustion temperature therein reaching a predetermined level correlated to and indicative of a predetermined, undesirably high concentration of carbon monoxide present in the combustion chamber. In various illustrated embodiments thereof, the combustion shutoff system is operative to terminate further combustion air inflow to the combustion chamber, or terminate further fuel flow to the burner portion of the water heater.Type: GrantFiled: September 28, 2004Date of Patent: November 15, 2005Assignee: The Water Heater Industry Joint Research and Development ConsortiumInventors: Gordon W. Stretch, Bruce A. Hotton, John H. Scanlon, Gary A. Elder, James T. Campbell, Larry D. Kidd, Eric M. Lannes, Garrett Doss, Michael W. Gordon, James M. Martin, James W. Mears, Thomas E. Archibald
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Patent number: 6957628Abstract: A gas-fired water heater is provided with a combustion shutoff system which precludes further combustion within the water heater's combustion chamber in response to a combustion temperature therein reaching a predetermined level correlated to and indicative of a predetermined, undesirably high concentration of carbon monoxide present in the combustion chamber. In various illustrated embodiments thereof, the combustion shutoff system is operative to terminate further combustion air inflow to the combustion chamber, or terminate further fuel flow to the burner portion of the water heater.Type: GrantFiled: September 28, 2004Date of Patent: October 25, 2005Assignee: The Water Heater Industry Joint Research and Development ConsortiumInventors: Gordon W. Stretch, Bruce A. Hotton, John H. Scanlon, Gary A. Elder, James T. Campbell, Larry D. Kidd, Eric M. Lannes, Garrett Doss, Michael W. Gordon
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Patent number: 6948929Abstract: A combustion type waste gas treatment system is capable of oxidatively decomposing a hazardous combustible waste gas while heating efficiently with a structure which allows the waste gas to mix with an auxiliary burning gas efficiently without the occurrence of backfire in a waste gas inlet pipe. The combustion type waste gas treatment system has a burner part and a combustion chamber. Combustion flames are formed to extend from the burner part toward the combustion chamber, and a combustible waste gas is introduced into the combustion flames from waste gas inlet pipes thereby oxidatively decomposing the waste gas. A flow velocity accelerating device makes the flow velocity of the combustible waste gas flowing through the waste gas inlet pipe higher than the burning velocity of the combustible waste gas.Type: GrantFiled: September 26, 2001Date of Patent: September 27, 2005Assignee: Ebara CorporationInventors: Tetsuo Komai, Kohtaro Kawamura, Takeshi Tsuji, Rikiya Nakamura, Kazutaka Okuda, Keiichi Ishikawa, Tomonori Ohashi, Yoshiro Takemura, Yasutaka Muroga, Tadakazu Nishikawa, Yuji Shirao
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Patent number: 6893253Abstract: A gas-fired water heater is provided with a combustion shutoff system which precludes further combustion within the water heater's combustion chamber in response to a combustion temperature therein reaching a predetermined level correlated to and indicative of a predetermined, undesirably high concentration of carbon monoxide present in the combustion chamber. In various illustrated embodiments thereof, the combustion shutoff system is operative to terminate further combustion air inflow to the combustion chamber, or terminate further fuel flow to the burner portion of the water heater.Type: GrantFiled: May 5, 2003Date of Patent: May 17, 2005Assignee: The Water Heater Industry Joint Research and Development ConsortiumInventors: Gordon W. Stretch, Bruce A. Hotton, John H. Scanlon, Gary A. Elder, James T. Campbell, Larry D. Kidd, Eric M. Lannes, Garrett Doss, Michael W. Gordon, James M. Martin, James W. Mears, Thomas E. Archibald
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Patent number: 6776125Abstract: A gas-fired water heater has a combustion chamber with a bottom wall defined by a perforated flame arrestor plate forming a portion of a flow path through which combustion air may be supplied to a burner structure within the combustion chamber. During firing of the water heater a combustion air shutoff system having a heat-frangible temperature sensing structure disposed within the combustion chamber senses an undesirable temperature increase in the combustion chamber, caused by for example a partial blockage of the flow path, and responsively terminates further air flow into the combustion chamber, thereby shutting down the burner, prior to the creation in the combustion chamber of a predetermined elevated concentration of carbon monoxide.Type: GrantFiled: October 9, 2003Date of Patent: August 17, 2004Assignee: The Water Heater Industry Joint Research and Development ConsortiumInventors: Gordon W. Stretch, Bruce A. Hotton, John H. Scanlon, Gary A. Elder, James T. Campbell, Larry D. Kidd, Eric M. Lannes, James M. Martin, James W. Mears, Thomas E. Archibald
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Patent number: 6776608Abstract: A method for a security control of a burner, provided with a body comprising a diffuser in which apertures for the flow of a mixture of air and fuel are made, comprises detecting a temperature representative of the temperature of said diffuser in at least one zone of the diffuser, generating a signal having an intensity depending on said representative temperature.Type: GrantFiled: March 15, 2000Date of Patent: August 17, 2004Assignee: Worgas Bruciatori S.R.L.Inventors: Feliciano Lasagni, Maurizio Beghi, Massimo Gilioli
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Patent number: 6769907Abstract: A fire display apparatus comprises a structural base plate supported in a horizontal attitude within a clay, or other fire resistant bowl. The base plate supports an annular burner tube on a outer, upwardly facing surface, the burner tube providing outwardly directed plural burner apertures adapted for directing flames in an outward direction. The base plate also supports a burner fence positioned in spaced-apart relationship with the burner apertures and adapted for directing the flames upwardly away from the outer face of the base plate. Burner gas is conducted to the space between the bowl interior and the underside of the base plate. Here, gas valves and a flame sensor provide automated flame monitoring and control. A system control unit is heat insulated using standoffs, an insulating mat and a heat cage.Type: GrantFiled: December 16, 2002Date of Patent: August 3, 2004Inventor: Kevin Eugene Doud
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Patent number: 6766771Abstract: A fuel-fired power vented heating appliance, representatively a water heater, has, in its draft structure, a single thermal or other type of cutoff switch which serves the dual function of preventing (1) the creation of an unacceptably high level of carbon monoxide in the combustion chamber of the appliance, and (2) thermal damage to a PVC vent pipe portion of the draft structure. When triggered, the cutoff switch operates to terminate further firing of the appliance. In one illustrative embodiment of the appliance, this is achieved by preventing further combustion air flow to the appliance. In another illustrative embodiment of the appliance, it is achieved by terminating further fuel flow thereto.Type: GrantFiled: September 11, 2003Date of Patent: July 27, 2004Assignee: The Water Heater Industry Joint Research and Development ConsortiumInventor: Bruce A. Hotton
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Patent number: 6766820Abstract: An improved pilot guard for controlling the flow of gaseous fuel to both a pilot burner and a main burner, the pilot valve comprising a housing having an inlet port, a pilot port and a main burner port; a bore extending through the housing between the pilot port and main burner port; a stop shuttle normally biased to a seated position in which it blocks communication between the inlet port and the bore; a reset shuttle positioned in the bore for lifting the stop shuttle from its seated position, the reset shuttle supporting a sealing member for sealing the inlet port from the main burner port but permitting communication between the inlet port and the pilot port when the reset shuttle lifts the stop shuttle from its seated position; a thermocouple capable of generating a current from the heat of the pilot burner; an electromagnet connected to the thermocouple and capable, when fully energized, of holding the stop shuttle from moving to its seated position; wherein the reset shuttle is movable by the force ofType: GrantFiled: August 9, 2001Date of Patent: July 27, 2004Assignee: FMC Technologies, Inc.Inventor: Maurice Hoss
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Patent number: 6743012Abstract: A heating apparatus for a motor vehicle including a heat exchanger having a wall for separating a heated exhaust gas from a heat exchange medium, a conveyor mechanism for conveying the heat exchange medium along the wall, and a protective mechanism for protecting the heater against overheating. The protective mechanism determines the mass flow of the heat exchange medium delivered by the conveyor mechanism when the heater is actuated so that the danger of overheating the heater is reliably detected when the delivery of the heat exchange medium is dammed.Type: GrantFiled: December 20, 2001Date of Patent: June 1, 2004Assignee: Webasto Thermosysteme International GmbHInventor: Felix Wolf
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Publication number: 20030113677Abstract: A fire display apparatus comprises a structural base plate supported in a horizontal attitude within a clay, or other fire resistant bowl. The base plate supports an annular burner tube on a outer, upwardly facing surface, the burner tube providing outwardly directed plural burner apertures adapted for directing flames in a peripheral, horizontal, outward direction. The base plate also supports a burner fence positioned in spaced-apart relationship with the burner apertures and adapted for directing the flames in an upward direction away from the outer face of the base plate. A rim fence ring is positioned outward of the burner fence and is adapted for reflecting heat inwardly. Burner gas is supplied to the space between the bowl interior and the underside of the base plate. Here, gas valves and a flame sensor provide automated flame monitoring and control.Type: ApplicationFiled: December 19, 2001Publication date: June 19, 2003Inventor: Kevin Eugene Doud
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Publication number: 20030113678Abstract: A fire display apparatus comprises a structural base plate supported in a horizontal attitude within a clay, or other fire resistant bowl. The base plate supports an annular burner tube on a outer, upwardly facing surface, the burner tube providing outwardly directed plural burner apertures adapted for directing flames in an outward direction. The base plate also supports a burner fence positioned in spaced-apart relationship with the burner apertures and adapted for directing the flames upwardly away from the outer face of the base plate. Burner gas is conducted to the space between the bowl interior and the underside of the base plate. Here, gas valves and a flame sensor provide automated flame monitoring and control. A system control unit is heat insulated using standoffs, an insulating mat and a heat cage.Type: ApplicationFiled: December 16, 2002Publication date: June 19, 2003Inventor: Kevin Eugene Doud
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Patent number: 6540504Abstract: A main burner 22, a pilot burner 25, and a lead-in pipe 29 supplying combustion exhaust to the pilot burner 25 are arranged in a combustion chamber R2. A flame arrester 27 with small holes 27a is provided at a bottom plate 13. Furthermore, a primary thermocouple 26 detecting the flame state of the pilot burner 25 and a secondary thermocouple 28 detecting the temperature in the combustion chamber R2 are connected in series but with opposite polarities. When the flame arrester 27 clogs up with fine particles, the pilot burner 25, which sucks in combustion exhaust, performs abnormal combustion before the main burner 22, which is detected by the primary thermocouple 26 and the secondary thermocouple 28, whereupon the combustion with the main burner 22 is stopped. Thus, incomplete combustion due to blocking of the air supply path can be prevented.Type: GrantFiled: April 10, 2002Date of Patent: April 1, 2003Assignee: Paloma Industries, LimitedInventors: Toshihiro Kobayashi, Hideo Chikazawa
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Publication number: 20020182552Abstract: A smoke density monitor for mounting on a ship smokestack. The smoke density monitor provides a transmitter head and a receiver head mounted to a smokestack. The transmitter head and receiver head are optically connected with a density monitor by means of fiber-optic lines. The density monitor is electrically connected to an alarm monitor, which at pre-set smokestack smoke densities activates an alarm and/or shuts down the ship's burner(s). An optional recorder may be connected to the alarm monitor to preserve a record of smoke density. Each transmitter and recorder head has an optical head slidably attached to a head housing for ease of servicing and maintenance. Each head housing incorporates an exit chamber, a trap chamber and a head chamber. The head chamber houses an optical head lens. The trap chamber provides the capability of trapping particulates to prevent their adhesion to the optical head lens.Type: ApplicationFiled: April 9, 2001Publication date: December 5, 2002Inventors: Ken E. Nielsen, Poul K. Sorensen
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Publication number: 20010051320Abstract: A method for a security control of a burner, provided with a body (1) comprising a diffuser (2; 8) in which apertures (3) for the flow of a mixture of air and fuel are made, comprises detecting a temperature representative of the temperature of said diffuser in at least one zone of the diffuser, generating a signal having an intensity depending on said representative temperature.Type: ApplicationFiled: March 15, 2000Publication date: December 13, 2001Inventors: Feliciano Lasagni, Maurizio Beghi, Massimo Gilioli
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Patent number: 6164958Abstract: A safety system for a gas burning device, such as a gas range having a plurality of burner assemblies. The safety system generally comprises a gas supply valve, a gas flow sensor, a gas leak warning circuit, a no-flame warning circuit, a gas supply valve controller for receiving warning signals from the warning circuits and for closing said gas supply valve in response thereto and a fan controller for activating the fan. Other warning circuits include a timer warning circuit and a smoke detection warning circuit. A display panel shows which warning circuit has issued a warning signal. A microprocessor may perform many system functions.Type: GrantFiled: September 20, 1999Date of Patent: December 26, 2000Inventors: Tai-Tung Huang, Po-Hao Huang
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Patent number: 6139311Abstract: An apparatus and method for operating a pilot burner apparatus and a main burner apparatus of a gas-fired appliance. The pilot burner apparatus draws combustion air from a first environment. The main combustion apparatus draws air from a second environment. In a shutdown condition, such as when a flammable vapor source is accidentally exposed to the second environment, the pilot burner apparatus draws air containing an undesired flammable vapor which eliminates the pilot flame, triggering a gas valve to close and shut down the fuel gas supply to the main burner apparatus and the pilot burner apparatus.Type: GrantFiled: May 7, 1999Date of Patent: October 31, 2000Assignee: Gas Research InstituteInventors: John A. Bowman, Karen R. Benedek, Stephan E. Schmidt
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Patent number: 6129542Abstract: A dual mode pilot burner having a control flame mode of operation and a pilot flame mode of operation, which dual mode pilot burner is suitable for controlling the fuel/air ratio of a main burner when operating in the control flame mode of operation. The dual mode pilot burner includes a burner body having a control flame holder and a pilot flame holder disposed downstream of the control flame holder, a mixing chamber having a fuel gas inlet, an oxidant inlet, and a mixed gas outlet, which mixed gas outlet is in fluid communication with the control flame holder and a fuel gas control valve for controlling a fuel gas flow rate through the fuel gas inlet into the mixing chamber.Type: GrantFiled: May 21, 1999Date of Patent: October 10, 2000Assignee: Gas Research InstituteInventors: Gautam Gauba, Charles Edward Benson, Johannes H. J. Thijssen, Peter Joseph Loftus, Roberto Ottavio Pellizzari, Stephen Carl Licht
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Patent number: 5997278Abstract: Apparatus provides an air/fuel mixture to a fully premixed burner and comprises means for providing fuel at a variable flow rate to the burner, means for supplying air at a variable flow rate to the fuel to form the mixture, means for sensing aeration of the fuel combustion products and control means for controlling the fuel flow rate in dependence upon a heat output demand and the air flow rate in dependence upon both the fuel flow rate and the sensed aeration in such a way that the air flow rate is sufficient to maintain the aeration at a predetermined value, the controller, in use, maintaining the fuel flow rate at one of a number of predetermined values and the air flow rate at a corresponding one of a number of differing predetermined values, each set of predetermined values being characterized by a constant value of the ratio between successive values.Type: GrantFiled: November 20, 1997Date of Patent: December 7, 1999Assignee: BG plcInventor: David Michael Sutton
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Patent number: 5722822Abstract: 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 the presence of a flame. A warning is generated when the measured time exceeds a predetermined allowable time. The allowable time is determined by taking into account the decreased responsiveness of an electrode that indicates the presence of the burner flame.Type: GrantFiled: May 3, 1995Date of Patent: March 3, 1998Assignee: Carrier CorporationInventors: Larry E. Wilson, Craig R. Knotts, Daniel L. Kelly
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Patent number: 5645411Abstract: A gas radiation burner has a burner plate, and a safety element providing an ignition safety for non-burnt discharging gas for igniting gas or interrupting a gas supply. The safety element is formed as a temperature measuring resistance which contacts the burner plate via electrical conductors and is composed of a material of the burner plate.Type: GrantFiled: October 13, 1995Date of Patent: July 8, 1997Assignee: Schott GlaswerkeInventors: Kurt Schaupert, Michael Kahlke
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Patent number: 5575274Abstract: A gas-fired, simulated log fireplace insert incorporating an automatic flue damper for controlling the operational state of a chimney vent (open/closed) in response to gas combustion, an externally mounted carbon monoxide detector for terminating or inhibiting gas combustion in response to an unsafe level of detected carbon monoxide and a temperature actuated switch, disposed within the firebox area of the fireplace proximate the flue, for terminating gas combustion in response to excessive fireplace temperatures caused by a malfunctioning damper.Type: GrantFiled: March 6, 1995Date of Patent: November 19, 1996Inventor: Thomas M. DePalma
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Patent number: 5295818Abstract: A control system controls a combustion burner. The system has an ignition electrode to create a flame in a burner, and a first temperature sensor to sense the temperature of the flame. A control terminates the operation of the ignition electrode when a predetermined temperature is sensed by the temperature sensor.Type: GrantFiled: April 6, 1992Date of Patent: March 22, 1994Assignee: ITR Holdings Ltd.Inventor: Edgar C. Robinson
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Patent number: 5139413Abstract: A pilot burner safety device of a gas combustion apparatus for shutting down a gas supply valve automatically at poor oxygen condition, includes an air intaking air means for intaking into a gas supplying passage, a heat detecting means mounted adjacent to the flame nozzle and an intaking control means mounted adjacent to the flame nozzle for controlling an air volume through the air intaking means by detecting flame temperature at the flame nozzle, and an air control means including a shape memory alloy which closes the halves of the air intaking means as a first step and opens the whole of the air intaking means at a heated condition, thereby avoiding nonignition phenomena at the initial ignition, and achieving a firing in one ignition operation.Type: GrantFiled: May 10, 1990Date of Patent: August 18, 1992Assignee: SamSung Electronics Co., Ltd.Inventors: Hong R. Son, Heui T. Kee
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Patent number: 5080578Abstract: 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.Type: GrantFiled: February 12, 1991Date of Patent: January 14, 1992Inventors: Harold Josephs, Levon H. Keshishian
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Patent number: 4993401Abstract: A cooking unit has a ceramic cooking surface, a gas burner underneath the surface, a gas supply including a solenoid valve for feeding a combustible gas to the burner, and an electric igniter juxtaposed with the burner and electrically energizable to ignite the combustible gas issuing from the burner. An electricity supply is connected to the igniter and to the gas supply for electrically energizing the igniter whenever the valve is open and supplying gas to the burner. In addition an electronic controller connected to the valve and to the electric supply monitors current consumption of the igniter and closes the valve when the current consumption of the igniter indicates same is malfunctioning. The controller includes a digital circuit that is also typically operated by the user of the cooker to turn the burners on and off and control their temperatures and an analog circuit connected parallel to each other. At least one of these circuits controls opening and closing of the valve.Type: GrantFiled: November 28, 1989Date of Patent: February 19, 1991Assignee: Cramer GmbH & Co., KommanditgesellschaftInventors: Helmut Diekmann, Gunter Krohn, Wilhelm Cramer
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Patent number: 4624632Abstract: A flame failure device for a gas-fired appliance has a heat sensitive device (24') in the form of fine bore tube (25). The tube is connected to one chamber (10) of a pressure sensitive gas flow control valve assembly. The chamber is pressurized and the rate of flow from the chamber is controlled by flow through the fine bore tube (25) the application of heat to which reduces the rate of flow through the fine bore tube (25) while the withdrawal of heat restores the rate of flow. Heat is provided by a gas burner of the appliance. The fine bore tube may have a non-circular cross-section and be formed by deforming part at least of a length of tubing (FIGS. 4A and 5B).Type: GrantFiled: December 19, 1985Date of Patent: November 25, 1986Assignee: T. I. Domestic Appliances LimitedInventors: Hugh V. Barnes, William M. Russell
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Patent number: 4591332Abstract: The feature of the present invention is that in the control device of the combustion apparatus, comprising an operational amplifier which compares a capacitor voltage charged by a flame rod current, with a reference voltage, thereby to issue an unusual signal, the reference voltage or the capacitor voltage is changed according to the atmosphere temperature by utilizing a thermo sensitive element, thereby the comparing operation is executed correctly irrespective of the atmosphere temperature.Type: GrantFiled: September 25, 1984Date of Patent: May 27, 1986Assignee: Matsushita Electric Industrial Co., Ltd.Inventor: Chuzoh Wada
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Patent number: 4460328Abstract: A heating system comprising the combination of storage vessels (10, 12) for conventional heating oil and waste oil, respectively, and in which the two storage vessels (10, 12) are effectively sealed apart, one from the other. At the initial stage of heating, conventional heating oil generates temperature of a predetermined amount and the waste oil from vessel (12) is thereafter utilized after having been heated either from a feedback of heat (26, 28) developed by the conventional heating oil from vessel (10) or by a separate electrical resistor element (133), such heating making the waste oil effective as a heating medium. The flows from the two storage vessels (10, 12) containing the waste oil and conventional oil, are pressure controlled (64, 84) so that relief pressure feedback (70, 82) is provided in each distribution network (14, 30).Type: GrantFiled: July 12, 1983Date of Patent: July 17, 1984Inventor: Werner J. Niederholtmeyer