Of Sequential Operation Of Plural Burners, E.g., Pilot And Main, Etc. Patents (Class 431/60)
  • Patent number: 10816195
    Abstract: A gas burner assembly for a cooktop appliance is provided. The gas burner has a gas stability chamber for providing a re-ignition source to primary burner ports positioned around the burner without the noises associated with spark controlled cycled burners. The stability chamber may entrain air from above the cooktop appliance for increased stability.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: October 27, 2020
    Assignee: Haier US Appliance Solutions, Inc.
    Inventor: Paul Bryan Cadima
  • Publication number: 20140272735
    Abstract: A method supplies reactants, including fuel gas, to burners that discharge the reactants into a furnace process chamber. In a stable flame mode of operation, stable flames are projected from the burners into the furnace process chamber. At a time when the furnace process chamber has a temperature at or above an autoignition temperature of the fuel gas, a diffuse combustion mode is initiated by supplying a selected burner with additional reactants, including reactants diverted from another burner, to blow off the stable flame at the selected burner.
    Type: Application
    Filed: March 13, 2013
    Publication date: September 18, 2014
    Inventor: John N. Newby
  • Publication number: 20140272737
    Abstract: A primary reactant stream is injected from a burner port into a combustion chamber along an axis. Staged reactant streams are injected into the combustion chamber adjacent to the primary reactant stream in differing configurations. The differences between the configurations of the staged reactant streams include differences in radial distance from the burner port, axial distance from the burner port, and direction relative to the axis. The reactant streams are shifted between differing modes, with differences between the modes including the presence or absence of a flame at the burner port, differences in fuel flow rates, and differences in combustion air flow rates. A heat release profile developed by combustion of the primary reactant stream, or the length of a flame developed by combustion of the primary reactant stream, can be controlled by shifting between the differing modes with reference to the heat release profile or the length of the flame.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Inventors: Thomas F. Robertson, Bruce E. Cain, John J. Nowakowski, Mark C. Hannum
  • Publication number: 20140199640
    Abstract: A locally powered intermittent pilot combustion controller may include an igniter, a thermal electric and/or photoelectric device that produces an electrical signal having power when exposed to a flame, and a local power source for providing power when the thermal electric and/or photoelectric device is not exposed to a flame. In some cases, the intermittent pilot combustion controller may include a memory for storing information about an ignition sequence for igniting a pilot flame, and a controller coupled to the memory. The controller may be configured to initiate the ignition sequence of the pilot flame using information stored in the memory, determine whether the ignition was successful by monitoring the electrical signal produced by the thermal electric and/or photoelectric device, and adjust the information stored in the memory based on whether the ignition sequence completed successfully.
    Type: Application
    Filed: January 11, 2013
    Publication date: July 17, 2014
    Applicant: Honeywell International Inc.
    Inventors: Brent Chian, Bruce L. Hill, Timothy J. Nordberg, Rolf L. Strand, Douglas Bird, Peter Anderson
  • Patent number: 8668490
    Abstract: The invention relates to a method and an arrangement for igniting a gas flow by means of remote control. The aim of the invention is to maintain the current consumption so low that an integratable voltage source can be used. To this end, a thermoelectric safety pilot valve (17) is opened and the escaping gas ignited by the actuation of an electronic control unit (5) fed by a voltage source. Said thermoelectric safety pilot valve (17) is maintained open by a safety pilot magnet (18) by means of a holding current from the voltage source until a thermocouple (22) provides the required holding current once the gas flow has been ignited or a defined holding time is exceeded.
    Type: Grant
    Filed: February 11, 2004
    Date of Patent: March 11, 2014
    Assignee: Mertik Maxitrol GmbH & Co. KG
    Inventors: Barbara Happe, Jürgen Blank
  • Patent number: 8502688
    Abstract: The disclosure relates to a process of configuring a standalone self-supplied numeric controlled relay for providing phase and earth over current protection to electrical systems by accurate current measurement. The arrangement for current measurement with control algorithms is provided for power control by providing amplified and conditioned current for optimization between the current to power an electronic circuit and the fidelity of a measured current waveform so that they both are at the acceptable levels at the same time. This disclosure describes the current sensing and associated algorithm for power control in a truly self-powered relay.
    Type: Grant
    Filed: August 16, 2010
    Date of Patent: August 6, 2013
    Assignee: ABB Technology Ltd
    Inventors: Niraj Suthar, Vijay Shah, Maulik Vyas, Bernhard Deck
  • Patent number: 8454352
    Abstract: A micro pilot for a gas hot water heater is provided. The micro pilot provides a flame that is substantially smaller than a typical pilot in a hot water heater during standby operation of the burner. Just prior to allowing gas to flow to the burner upon a call for heat, a pilot flame of sufficient size to ensure ignition of the burner is provided. In one embodiment this larger pilot flame is produced by providing an additional amount of bleed gas to the pilot to increase flame size. In another embodiment, bleed gas is provided to a separate booster pilot, which is ignited by the micro pilot. The flame from the booster pilot is then used to ignite the main burner. This design allows for the micro pilot to be positioned closer to the flame trap of a flammable vapor resistant hot water heater to ensure smooth ignition of any such vapor.
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: June 4, 2013
    Assignee: Invensys Controls Australia Pty Ltd.
    Inventors: Geoffrey Mervyn Whitford, Brendon John Ruwoldt
  • Publication number: 20130040253
    Abstract: The disclosure provides a controller for a multistage gas furnace, a multistage gas furnace and computer readable medium for performing a method to operate a furnace. In one embodiment, the controller includes: (1) an interface configured to receive a heating call and (2) a corrosion reducer configured to ignite the gas furnace at a high fire operation based on if an indoor circulating fan of the gas furnace is active.
    Type: Application
    Filed: August 12, 2011
    Publication date: February 14, 2013
    Applicant: Lennox Industries, Incorporated
    Inventors: Glenn W. Kowald, Hans J. Paller
  • Patent number: 8251297
    Abstract: Methods and Systems for controlling boiler systems are disclosed. In one illustrative embodiment, a derivative action control is used reduce the likelihood of overshoot from a newly activated boiler. When a newly activated boiler becomes active, the boiler is held at a low firing rate for a predetermined period of time. The predetermined period of time may be cut short or even entirely eliminated under certain conditions. The methods and devices are further adapted for use in multi-stage boiler systems. In one embodiment, only the first stage of a multi-stage boiler system that becomes active is held at the low firing rate.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: August 28, 2012
    Assignee: Honeywell International Inc.
    Inventors: Michael A. Pouchak, Jeffrey M. Hammer
  • Publication number: 20120208139
    Abstract: A fuel-fired high capacity liquid heating appliance, representatively a boiler or a water heater, has a fluid heat exchanger extending around a combustion chamber into which first and second fuel burners extend, the first and second burners respectively having associated blowers for supplying combustion air thereto. Illustratively, the combustion chamber is oval-shaped, with the burners extending into opposite ends the combustion chamber If one of the burners is not firing while the other burner is firing, a control system starts the non-firing burner's blower, to protect it from overheating by the firing burner, if the control system senses an excess temperature in the non-firing burner. The heat exchanger comprises a series of fluid receiving tubes extending between baffle-free header structures iteratively sized to equalize fluid flow rates through the heat exchanger tubes over a wide flow rate range.
    Type: Application
    Filed: November 14, 2011
    Publication date: August 16, 2012
    Applicant: Rheem Manufacturing Company
    Inventor: Raymond I. Hallit
  • Publication number: 20120045725
    Abstract: Provided is a combustor that is made compact and achieves NOx reduction.
    Type: Application
    Filed: August 13, 2009
    Publication date: February 23, 2012
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Satoshi Takiguchi, Atsushi Yuasa, Satoshi Tanimura
  • Patent number: 8011358
    Abstract: A burner for range covers or similar, to allow a broad range of calorific capacities, and a better burner distribution in the cover, with a generally semi-rectangular form, and containing a plurality of ports and a plurality of manners to ignite it, wherein the burner is capable of interacting with other burners at determined length and height distances, creating discontinuous flames between the burners.
    Type: Grant
    Filed: February 20, 2008
    Date of Patent: September 6, 2011
    Assignee: Mabe Mexico S. DE R.L. DE C.V.
    Inventors: Victor Gerardo Caloca Galindo, José Arturo Lona Santoyo, Roberto Cabrera Botello
  • Publication number: 20090181334
    Abstract: A system for controlling the temperature of a natural gas processing unit. The system having a main burner and a pilot burner operatively associated with the main burner, and temperature control means for regulating the temperature of the natural gas processing unit. A pilot valve is interposed between a fuel supply and the pilot burner and is responsive to the temperature control means so as to allow fuel to flow through the pilot valve and to the pilot burner when the natural gas processing unit is below a selected temperature. An igniter wire is operatively associated with the pilot burner and responsive to temperature control means for generating a spark that ignites fuel being discharged from pilot burner. A main burner control valve is interposed between the fuel supply and the main burner and is responsive to the temperature control means so as to allow fuel to flow through the main burner control valve and the main burner upon ignition of the pilot burner.
    Type: Application
    Filed: January 12, 2009
    Publication date: July 16, 2009
    Inventor: Derek Moore
  • Patent number: 7547333
    Abstract: In a fuel reforming system (32) of a fuel cell system (1), which includes a reformer (7) generating hydrogen-containing gas to be an electromotive fuel and a combustor (6) generating combustion gas, the combustor (6) has two combustion parts including a main combustion part (20) and a sub-combustion part (18), a fuel pre-vaporization part (19) between the two combustion parts and a main fuel injection valve (16) and a sub-fuel injection valve (15) which supply the fuel to the respective combustion parts.
    Type: Grant
    Filed: August 3, 2004
    Date of Patent: June 16, 2009
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Koichi Yamaguchi, Takashi Aoyama, Tadashi Shoji
  • Patent number: 7527495
    Abstract: A multiple gas burner assembly has two burners spaced apart by a bridge burner. An axis extending through the first and third burner intersects the perimeter of the bridging second burner. The second burner provides a means for providing a substantially continuous flame perimeter and continuous heating intermediate the first burner and third burner when the three burners are lit.
    Type: Grant
    Filed: October 18, 2004
    Date of Patent: May 5, 2009
    Assignee: Burner Systems International, Inc.
    Inventors: Siu Hun P. Yam, William M. Pryor, Bernard Dane
  • Patent number: 7494337
    Abstract: The present invention provides an apparatus and method for providing multiple stages of fuel. A burner assembly having a face for production of a flame and a plurality of longitudinally adjacent chambers opening to the face. A divider is provided that splits the burner chambers into two separate sections in such a manner that one section includes burner chambers greater in number than the other section. The first section can be ignited solely. Thereafter, the second section can be ignited. Once the second section is ignited, the first section may be optionally turned off.
    Type: Grant
    Filed: April 22, 2004
    Date of Patent: February 24, 2009
    Assignee: Thomas & Betts International, Inc.
    Inventors: Werner Specht, Steve Dunlap
  • Patent number: 7435081
    Abstract: A gas valve includes a gas inlet in fluid communication with a first chamber, a second chamber in selective fluid communication with the first chamber, a gas outlet in selective fluid communication with the second chamber, a pilot light outlet in fluid communication with the second chamber, and a bypass channel in fluid communication with the second chamber and in fluid communication with the first chamber. The bypass channel limits bypass gas flow to an amount that is insufficient to ignite a pilot flame at the pilot light outlet when the second channel is in fluid communication with the gas outlet.
    Type: Grant
    Filed: November 8, 2004
    Date of Patent: October 14, 2008
    Assignee: Honeywell International Inc.
    Inventor: Sybrandus B. V. Munsterhuis
  • Patent number: 7252502
    Abstract: The method and apparatus provides a controller (which might comprise a microprocessor) that can control gas flow to a pilot burner in fluid communication with a manual pilot valve and an automatic pilot valve. The exemplary embodiments can comprise a selectable input device that can open the manual pilot valve to allow gas flow to the pilot burner. A pilot flame can then heat one or more thermal detection devices in thermal communication with the pilot burner, wherein the one or more thermal detection devices can output a variable voltage potential to the controller. The controller can then open the automatic pilot valve to maintain gas flow to the pilot burner after the manual pilot valve has been closed. In an exemplary embodiment, the only voltage potential used to power the controller is supplied by the one or more thermal detection devices.
    Type: Grant
    Filed: January 27, 2004
    Date of Patent: August 7, 2007
    Assignee: Honeywell International Inc.
    Inventor: Sybrandus B. V. Munsterhuis
  • Patent number: 6981865
    Abstract: A catalyst combustor (11) includes an inner catalyst combustion portion (20) connected to a substitute fuel supply line (LS21, 12, 16) and a substitute oxidizer supply line (LS22, 13), an outer catalyst combustion portion (40) connected to an effluent fuel supply line (LS23, 14) and an effluent oxidizer supply line (LS24, 15), and a fluid communication portion (60) connecting the inner catalyst combustion portion (20) and the outer catalyst combustion portion (40) to each other, and has a fixed relationship provided among a fluid resistance (R2) of the inner catalyst combustion portion (20), a fluid resistance (R4) of the outer catalyst combustion portion (40), and a fluid resistance (R6) of the fluid communication portion (60), whereby substantially a warming catalyst combustion is caused to occur simply in the inner catalyst combustion portion (20), and a regular catalyst combustion is caused to occur in the inner catalyst combustion portion (20) and the outer catalyst combustion portion (40).
    Type: Grant
    Filed: February 16, 2001
    Date of Patent: January 3, 2006
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Katsuya Kobayashi
  • Patent number: 6932101
    Abstract: A solenoid valve assembly for controlling gas supply and opening and closing gas supply with a regulation function generally includes a solenoid valve assembly having a housing, a diaphragm assembly, a first and second solenoid valves, a first and second valve bodies, a first and second terminals of positive and negative poles, a first and second wire winding assemblies, a first and second “E” type cores, a first and second “T” type cores, springs, and brackets of the first and second valves, wherein a small power is required for the opening and closing of diaphragms because of the adopted indirect opening capability of this valve.
    Type: Grant
    Filed: June 17, 2002
    Date of Patent: August 23, 2005
    Assignee: Grand Hall Enterprise Co., Ltd.
    Inventor: William Home
  • Patent number: 6920377
    Abstract: A self-sustaining control for a heating system, having conventional operational modes and pilot burner assembly, is disclosed. A controller directs operation in accordance with a need-based protocol and monitors the condition of a storage device, which provides system power during the stand-by or off mode under normal conditions. A thermo-electric device is in thermal communication with the pilot burner assembly and powers the system whenever the pilot is lit. Regardless of heat need, the controller directs operation in a pilot-on mode, in lieu of an off mode, whenever the storage device is compromised.
    Type: Grant
    Filed: July 28, 2003
    Date of Patent: July 19, 2005
    Assignee: Honeywell International Inc.
    Inventor: Brent Chian
  • Patent number: 6644960
    Abstract: A device for supplying one or more arrays (1, 2) of burners (3), in which each burner (3) comprises at least one fuel inlet line (302) and at least one comburent agent inlet line (301). The said lines (302, 301) of the burners (3) are connected upstream respectively to at least one fuel supply duct (13) and to at least one comburent agent supply duct (9), and means (10, 11, 13, 16) are provided for monitoring and controlling the flows of fuel and comburent agent in these supply ducts. These means are operationally connected to at least one central unit (17) for controlling the distribution of the said flows to the arrays (1, 2) of burners (3)A device for supplying one or more arrays (1, 2) of burners (3).
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: November 11, 2003
    Assignee: Techint Compagnia Tecnica Internazionale
    Inventors: Marcello Tomolillo, Massimiliano Fantuzzi
  • Patent number: 6571829
    Abstract: A gas control valve in a water heater is provided for improving the ease of assembling, minimizing the size and the cost, and decreasing the limitation of layout design.
    Type: Grant
    Filed: March 15, 2001
    Date of Patent: June 3, 2003
    Assignee: Paloma Industries Limited
    Inventors: Tatsuo Kuriyama, Atsushi Tanahashi
  • Publication number: 20020155404
    Abstract: A method is disclosed for operating a gas-fired heater to maintain temperature within a zone. The gas-fired heater is modulated between a higher firing rate and a lower firing rate within a pseudo steady-state mode until a current firing rate exceeds a predetermined maximum time period ttrans. The gas-fired heater is then modulated between an updated higher firing rate and an updated lower firing rate within a transient mode until an updated current firing rate exceeds a predetermined maximum time period tdiag. Finally, the higher firing rate and the lower firing rate are redefined in a diagnostic mode until the gas-fired heater returns to the pseudo steady-state mode.
    Type: Application
    Filed: April 20, 2001
    Publication date: October 24, 2002
    Inventors: Steven Casey, John Bowman
  • Publication number: 20020155405
    Abstract: A gas-fired heater includes a plurality of burners and one or more valves corresponding to one of the burners and operating between a closed position and an open position. A fuel supply is in fluidic communication with at least one of the burners when the one or more valves are in the open position. A modulator receives a temperature signal and computes, as a function of the temperature signal, and emits at least one control signal. The modulator then operates the one or more valves between the open position and the closed position as a function of the at least one control signal and controls the one or more valves to either activate or deactivate the burners for incrementally modulating a heat input to the gas-fired heater.
    Type: Application
    Filed: April 20, 2001
    Publication date: October 24, 2002
    Inventors: Steven Casey, John A. Bowman, Sergei Brussovansky
  • Patent number: 6312250
    Abstract: A premix burner apparatus includes a burner structure and a firing rate control system. The burner structure defines a premix reaction zone configured to communicate with a process chamber. The burner structure further defines a plurality of separate entrances to the reaction zone, and a corresponding plurality of separate premix flow paths, each of which is configured to direct both oxidant and fuel to a respective one of the entrances to the reaction zone. The firing rate control system is operative to control flows of oxidant and fuel along at least one of the flow paths separately from flows of oxidant and fuel along at least one other flow path.
    Type: Grant
    Filed: March 9, 2000
    Date of Patent: November 6, 2001
    Assignee: North American Manufacturing Company
    Inventors: Thomas B. Neville, Brian J. Schmotzer, Naim H. Saker
  • Patent number: 6082388
    Abstract: The device comprises a safety valve with an actuator which can be armed manually, a regulation valve disposed in a duct downstream of the safety valve for supplying a main burner, a tapping duct for supplying a pilot burner, and a flame detector for the pilot burner for supplying the actuator of the safety valve with sufficient energy to hold the safety valve open after manual arming has taken place and the pilot light has been lit. In order also to supply another burner without compromising the safety of the device, an on/off valve provided in a duct branching off the main duct between the safety valve and the regulation valve has an operating member coupled to the manual arming member of the actuator of the safety valve for keeping the on/off valve in a condition in which it shuts off the branch duct during the manual arming of the safety-valve actuator.
    Type: Grant
    Filed: March 17, 1998
    Date of Patent: July 4, 2000
    Assignee: Sit La Precisa S.r.l.
    Inventors: Gianpiero Turrin, Pierluigi De' Stefani, Vanni Gallocchio
  • Patent number: 6010327
    Abstract: A fuel control system, parts therefor, and methods of making are provided. The fuel control system includes a fuel control valve unit (FCU) and a fuel conduit having an end secured in a fuel outlet opening in a housing of the fuel control valve unit. The end of the conduit is disposed in a certain desired axial position in the fuel outlet opening relative to the housing, the housing has a movable part. In a first position of the movable part, the end of the conduit can be axially moved from a position outside the housing to the certain desired axial position. In a second position, the movable part cooperates with a securing device on the end of the conduit to secure the end in the certain desired axial position thereof.
    Type: Grant
    Filed: March 3, 1997
    Date of Patent: January 4, 2000
    Assignee: Robertshaw Controls Company
    Inventor: Jay Katchka
  • Patent number: 5975884
    Abstract: A temperature control system for gas operated devices. The system includes a burner (23) that is connected to a gas supply through a regulator (41). A pilot light assembly (26) has a first vane (29) and a second vane (32) which provide a flame for igniting the gas from the burner (23) and for heating a thermocouple (38) to produce a control voltage for operating the regulator (41) and a temperature control (44).
    Type: Grant
    Filed: October 24, 1997
    Date of Patent: November 2, 1999
    Assignee: H. Barry Bone
    Inventor: Arthur Ralph Dugger
  • Patent number: 5967766
    Abstract: 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 operated unit. The tip or end of the thermocouple device is secured in the opening for operative connection to the thermocouple operated unit. The thermocouple device has a unique securing structure which permits the end thereof to be axially moved from outside the housing to a certain desired axial position within the opening and cooperates with a unique securing structure on the housing to secure the end of the thermocouple device in the certain desired axial position.
    Type: Grant
    Filed: March 3, 1997
    Date of Patent: October 19, 1999
    Assignee: Robertshaw Controls Company
    Inventor: Jay Katchka
  • Patent number: 5961317
    Abstract: A combustion head assembly comprising a mounting plate having a plurality of apertures and adapted for mounting to a boiler, and a plurality of combustion heads removably mounted in each of the apertures. The combustion heads each have a fuel nozzle and ignition tips. There is at least one fuel source removably connected to the fuel nozzles of each of the combustion heads and at least one ignition source removably connected to the ignition tips of each of the combustion heads. There is at least one source of forced air removably connected to said combustion heads, and a controller adapted to operate each combustion head independently of the other combustion heads. Each combustion head can be removed from the assembly for repair and inspection without interrupting the operation of the other combustion heads and the boiler.
    Type: Grant
    Filed: May 19, 1998
    Date of Patent: October 5, 1999
    Inventor: Joseph Fauci
  • Patent number: 5787874
    Abstract: A cooking assembly has a main burner, a pilot burner mounted in it and having a vent, a gas valve having separate main and pilot gas outlets, and a main-burner controller including a temperature sensor on the main burner, a control unit on the valve capable of varying gas output from the main gas outlet, and a capillary tube connected between the sensor and the control unit. This controller can vary gas flow from the main outlet in accordance with the temperature of the main burner as sensed by the sensor. An electrical igniter on the main burner can be energized by a switch on the valve. A pilot-burner controller connected to the switch includes a thermoelectric sensor in the pilot vent and blocks gas output from the gas outlets when insufficient heat is detected by its sensor and the switch is not closed.
    Type: Grant
    Filed: December 27, 1995
    Date of Patent: August 4, 1998
    Assignee: Cramer GmbH
    Inventors: Gunter Krohn, Wilhelm Cramer, Helmut Diekmann
  • Patent number: 5749718
    Abstract: Gas control apparatus to regulate the flow of gas to a plurality of burners is disclosed. The apparatus permits a main gas solenoid valve to be actuated for a pre-determined period of time allowing the burners to be ignited. If the burners are not ignited within the pre-determined period of time, the main gas solenoid valve is deactuated. Even though a main gas solenoid valve is utilized, each burner can be separately ignited by means of a start signal applied thereto. After ignition, the main gas solenoid valve will remain actuated only if a flame is present at the ignited burner and a start signal is applied to the remaining burners.
    Type: Grant
    Filed: January 9, 1995
    Date of Patent: May 12, 1998
    Assignee: Channel Products, Inc.
    Inventor: Don A. Berlincourt
  • Patent number: 5582516
    Abstract: Gas control apparatus to regulate the flow of gas to a plurality of burners is disclosed. The apparatus permits a main gas solenoid valve to be actuated for a pre-determined period of time allowing the burners to be ignited. If the burners are not ignited within the pre-determined period of time, the main gas solenoid valve is deactuated. Even though a main gas solenoid valve is utilized, each burner can be separately ignited by means of a start signal applied thereto. After ignition, the main gas solenoid valve will remain actuated only if a flame is present at the ignited burner and a start signal is applied to the remaining burners.
    Type: Grant
    Filed: November 9, 1992
    Date of Patent: December 10, 1996
    Assignee: Channel Products, Inc.
    Inventor: Don A. Berlincourt
  • Patent number: 5452687
    Abstract: A boiler sequencer system having a microprocessor based controller which allows the firing rate for multiple boilers to be increased or decreased with a proportional output integrated with the process variable rate of recovery that is desired, preventing unnecessary rapid advancements to high fire even when a boiler is started with a high off-set of the process variable from its set point. The controller automatically overrides this proportionate control when the process variable rises above a predetermined maximum or falls below a predetermined minimum.
    Type: Grant
    Filed: May 23, 1994
    Date of Patent: September 26, 1995
    Assignee: Century Controls, Inc.
    Inventor: Leo P. Christiansen
  • Patent number: 5372497
    Abstract: According to this invention there is provided a process and apparatus for the ignition of a pilot burner in an inert atmosphere without substantially contaminating the inert atmosphere. The process includes the steps of providing a controlled amount of combustion air for a predetermined interval of time to the combustor then substantially simultaneously providing a controlled mixture of fuel and air to the pilot burner and to a flame generator. The controlled mixture of fuel and air to the flame generator is then periodically energized to produce a secondary flame. With the secondary flame the controlled mixture of fuel and air to the pilot burner and the combustion air is ignited to produce a pilot burner flame. The pilot burner flame is then used to ignited a mixture of main fuel and combustion air to produce a main burner flame.
    Type: Grant
    Filed: May 24, 1993
    Date of Patent: December 13, 1994
    Assignee: SGI International
    Inventors: Dennis W. Coolidge, Franklin G. Rinker
  • Patent number: 5158447
    Abstract: A primary gas furnace control including a thermostatically controlled intermittent ignition system, the control being effective to monitor and control main gas valve action through use of flame rectification. The control features a slight delay on main valve dropout with flame failure and an extension of the ignition source into the main burner cycle to prevent nuisance recycling. If desired, the control may also include timed pilot valve, thermostat resettable, lockout as well as prepurge capability for use in applications requiring a furnace combustion chamber purge prior to an ignition cycle.
    Type: Grant
    Filed: January 25, 1990
    Date of Patent: October 27, 1992
    Assignee: Robertshaw Controls Company
    Inventor: Frederick J. Geary
  • Patent number: 5127823
    Abstract: A control system for a gas furnace, control device therefor and methods of making the same are provided, the system comprising an electrical circuit that has a metal oxide varistor therein that is adapted to interconnect one end of a secondary winding of a transformer to frame ground only after the potential for sparking is reached at an igniter that is interconnected to the other end of the secondary winding and causes the varistor to break over and cause the igniter to spark.
    Type: Grant
    Filed: November 21, 1990
    Date of Patent: July 7, 1992
    Assignee: Robertshaw Controls Company
    Inventor: Michael R. Bonner
  • Patent number: 5099822
    Abstract: A cooking range in which a burner below a glass-ceramic plate is ignited with a glow igniter switched off in response to an ionization detector when combustion products are effected so as to prevent excessive heating of the glow igniter.
    Type: Grant
    Filed: February 7, 1991
    Date of Patent: March 31, 1992
    Assignee: Cramer GmbH & Co. Kommanditgesellschaft
    Inventors: Wilhelm Cramer, Dietmar Kaselow
  • Patent number: 5094612
    Abstract: Gas injection pipe for a sequential burner in gas variable-power boilers. An array of gas injectors which are located on the injection pipe may each be plugged by a corresponding valve which is mounted on the free end of a rigid blade transversely extending through an internal chamber of the injection pipe. A rotating shaft which is stepwise driven is provided at right angles to each blade with recesses which are angularly offset on the shaft. Each blade is provided with a stud which is located in a corresponding recess when the latter is in its upward position. The stud lifts up the blade when the shaft is rotated on purpose to open the valve.
    Type: Grant
    Filed: November 21, 1989
    Date of Patent: March 10, 1992
    Assignee: Saunier Deval - Eau Chaude Chauffage - S.D.E.C.C.
    Inventor: Didier Vallat
  • Patent number: 4986468
    Abstract: A gas fired burner includes a pilot gas valve and a burner gas valve sequentially operated to light the burner. A monitor includes individual monitoring of the status of the valves and the burner as well as other components and systems associated with the burner and includes separate lamps for each components. A test circuit monitors the sequential ignition cycle and includes a timing circuit having a timing period somewhat longer than the selected ignition period. An indicator lamp is connected to the timing unit. A sensing device is connected to the pilot gas valve and to the burner gas valve and each establishes an output in response to activation of pilot gas valve and burner valve. The pilot valve signal turns on the timing unit and the burner valve signal turns off the timing unit such that the indicator lamp is actuated only if ignition of the burner is not established within said selected ignition period.
    Type: Grant
    Filed: August 29, 1989
    Date of Patent: January 22, 1991
    Assignee: A.O. Smith Corporation
    Inventor: John J. Deisinger
  • Patent number: 4971549
    Abstract: A control unit for a gas furnace that has an electrically operable pilot gas valve and an electrically operable main gas valve and a method of making the control unit are provided, the control unit comprising an electrical circuit having a gas valve section that comprises a silicon controlled rectifier and a first capacitor and a second capacitor so electrically interconnected together that the capacitors are adapted to be charged on each half wave cycle of a certain polarity of an alternative current source that is imposed on the circuit and that second capacitor is adapted to discharge through a relay coil that controls the gas valve to energize that relay coil only when the silicon controlled rectifier conducts, the silicon controlled rectifier being adapted to conduct only when the first capacitor is discharged, another section of the electrical circuit being adapted to discharge the first capacitor only on each half wave cycle of the other polarity of the alternative current source.
    Type: Grant
    Filed: July 14, 1989
    Date of Patent: November 20, 1990
    Assignee: Robertshaw Controls Company
    Inventor: Frederick J. Geary
  • Patent number: 4915614
    Abstract: A primary gas furnace control including a thermostatically controlled intermittent ignition system, the control being effective to monitor and control main gas valve action through use of flame rectification. The control features a slight delay on main valve dropout with flame failure and an extension of the ignition source into the main burner cycle to prevent nuisance recycling. If desired, the control may also include time pilot valve, thermostat resettable, lockout as well as prepurge capability for use in applications requiring a furnace combustion chamber purge prior to an ignition cycle.
    Type: Grant
    Filed: March 30, 1989
    Date of Patent: April 10, 1990
    Assignee: Robertshaw Controls Company
    Inventor: Frederick J. Geary
  • Patent number: 4867191
    Abstract: A self-contained gas light control module is disclosed as including a tubular housing with a main tubular gas line extending through the housing and a normally open electro-mechanical valve in the gas line to permit flow of gas therethrough at night. During day light hours, a solar cell is activated to close the normally open electro-mechanical valve and shut-off the main tubular gas line; however, a smaller by-pass gas passageway or line is connected around the electro-mechanical valve to permit a smaller amount of continuous gas flow around the electro-mechanical valve, when closed, for low pilot flame burning of the gas light during day light hours.
    Type: Grant
    Filed: September 23, 1988
    Date of Patent: September 19, 1989
    Assignee: American General Products, Inc.
    Inventor: Jon S. Walters
  • Patent number: 4865539
    Abstract: A control unit for a gas furnace that has an electrically operable pilot gas valve and an electrically operable main gas valve and a method of making the control unit are provided, the control unit comprising an electrical circuit having a gas valve section that comprises a silicon controlled rectifier and a first capacitor and a second capacitor so electrically interconnected together that the capacitors are adapted to be charged on each half wave cycle of a certain polarity of an alternative current source that is imposed on the circuit and that the second capacitor is adapted to discharge through a relay coil that controls the gas valve to energize that relay coil only when the silicon controlled rectifier conducts, the silicon controlled rectifier being adapted to conduct only when the first capacitor is discharged, another section of the electrical circuit being adapted to discharge the first capacitor only on each half wave cycle of the other polarity of the alternative current source.
    Type: Grant
    Filed: August 23, 1988
    Date of Patent: September 12, 1989
    Assignee: Robertshaw Controls Company
    Inventor: Frederick J. Geary
  • Patent number: 4836770
    Abstract: A primary gas furnace control including a thermostatically controlled intermittent ignition system, the control being effective to monitor and control main gas valve action through use of flame rectification. The control features a slight delay on main valve dropout with flame failure and an extension of the ignition source into the main burner cycle to prevent nuisance recycling. If desired, the control may also include timed pilot valve, thermostat resettable, lockout as well as prepurge capability for use in applications requiring a furnace combustion chamber purge prior to an ignition cycle.
    Type: Grant
    Filed: April 22, 1988
    Date of Patent: June 6, 1989
    Assignee: Robertshaw Controls Company
    Inventor: Frederick J. Geary
  • Patent number: 4755133
    Abstract: A primary gas furnace control including a thermostatically controlled intermittent ignition system, the control being effective to monitor and control main gas valve action through use of flame rectification. The control features a slight delay on main valve dropout with flame failure and an extension of the ignition source into the main burner cycle to prevent nuisance recycling. If desired, the control may also include timed pilot valve, thermostat resettable, lockout as well as prepurge capability for use in applications requiring a furnace combustion chamber purge prior to an ignition cycle.
    Type: Grant
    Filed: April 13, 1987
    Date of Patent: July 5, 1988
    Assignee: Robertshaw Control Company
    Inventor: Frederick J. Geary
  • Patent number: 4680005
    Abstract: A primary gas furnace control including a thermostatically controlled intermittent ignition system, the control being effective to monitor and control main gas valve action through use of flame rectification. The control features a slight delay on main valve dropout with flame failure and an extension of the ignition source into the main burner cycle to prevent nuisance recycling. If desired, the control may also include timed pilot valve, thermostat resettable, lockout as well as prepurge capability for use in applications requiring a furnace combustion chamber purge prior to an ignition cycle.
    Type: Grant
    Filed: June 26, 1986
    Date of Patent: July 14, 1987
    Assignee: Robertshaw Controls Company
    Inventor: Frederick J. Geary
  • Patent number: 4627416
    Abstract: A water heater is disclosed having a heat exchanger, a main burner means for heating the heat exchanger, a standing burner, a main fuel passage means for supplying fuel to the main burner, a manual valve on the main fuel passage means which is operable by a manual operation member, an automatic valve disposed on the main fuel passage means at a point downstream from the manual valve, the automatic valve adapted to open in response to the pressure of a supply of water at a water pressure sensitive member, and a standing burner fuel passage means for supplying fuel to the standing burner, the standing burner fuel passage means drawing fuel from the main fuel passage means at a point in between the manual valve and the automatic valve.
    Type: Grant
    Filed: March 6, 1984
    Date of Patent: December 9, 1986
    Assignee: Rinnai Kabushiki Kaisha
    Inventors: Hiroshi Ito, Kanae Aida, Masanobu Shinozaki, Masahiko Koumura, Kazumi Tamada, Katsushi Mizutani
  • Patent number: 4626192
    Abstract: A primary gas furnace control including a thermostatically controlled intermittent ignition system, the control being effective to monitor and control main gas valve action through use of flame rectification. The control features a slight delay on main valve dropout with flame failure and an extension of the ignition source into the main burner cycle to prevent nuisance recycling. If desired, the control may also include timed pilot valve, thermostat resettable, lockout as well as prepurge capability for use in applications requiring a furnace combustion chamber purge prior to an ignition cycle.
    Type: Grant
    Filed: July 2, 1984
    Date of Patent: December 2, 1986
    Assignee: Robertshaw Controls Company
    Inventor: Frederick J. Geary