Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 8123517 | Automatic device for the ignition and control of a gas apparatus and relative driving method An automatic system and method to provide the ignition and monitoring of a pilot flame for gas burners. The circuit includes a microcontroller that acts on at least one gas valve, a flame igniter, and a flame detector circuits. The valve driver is a switching circui... | 02/28/2012 |
| 8123518 | Burner firing rate determination for modulating furnace A modulating furnace having a variable rate burner and a controller is operated at a first burner firing rate for a first period of time, and a higher burner firing rate once the first period of time has expired. In some instances, the burner may be operated only wh... | 02/28/2012 |
| 8113822 | Combustion method and combustion apparatus First, to decrease an amount of emitted nitrogen oxides to zero as much as possible and also decrease an amount of emitted carbon monoxide to a permissible level. Second, to save energy on combustion at a low air ratio close to 1.0. Third, to attain a stable air rat... | 02/14/2012 |
| 8109758 | System and control method for detecting an abnormal burning situation using air pressure sensing and flame detection Disclosed is a method for detecting a combustion state of a boiler, and more particularly to a boiler and a method capable of exactly detecting an abnormal combustion state of a gas boiler using an air pressure sensor and a flame detection unit, thereby improving ef... | 02/07/2012 |
| 8092212 | Rotary valve arranged in multi-gas cooker Cooking appliance (1A,1B) having an external and control panel (2,2′) equipped with one or more regulating valves, where the rotary regulator organ (6) is equipped with various peripheral openings (16-19) for supplying a f... | 01/10/2012 |
| 8083517 | Method of operating a furnace A method of firing a burner into a furnace process chamber supplies the burner with fuel and combustion air at a ratio that provides a level of excess air. The method includes the steps of reducing the flow rate of combustion air, and maintaining the level of excess... | 12/27/2011 |
| 8083518 | Combustion method and combustion apparatus A combustion method applied to a water-tube boiler and a regenerator of an absorption-type refrigerator includes a concentration ratio adjusting step of adjusting a concentration ratio of nitrogen oxides, carbon monoxide, and oxygen in a gas from a gas generation so... | 12/27/2011 |
| 8070481 | Combustion blower control for modulating furnace A furnace includes a combustion blower and one or more pressure switches. In some cases, the one or more pressure switches may be used to calculate one or more operating points for the combustion blower. Additional operating points may be calculated by interpolation... | 12/06/2011 |
| 8057218 | Method for burning liquid fuels A method for burning liquid fuels, wherein an amount of total combustion air required for burning is introduced into the liquid fuel in the form of small air bubbles to provide a highly variable overall heat output, particularly at least within a range of one to fif... | 11/15/2011 |
| 8021143 | Furnace A gas fired furnace capable of operating with a 16:1 turndown ratio or greater. The furnace includes a plurality of burners (10) grouped into at least (14a) first and second (14b) groups, each group connected to a source of combust... | 09/20/2011 |
| 8011921 | System and control method for detecting an abnormal burning situation using air pressure sensing and flame detection Disclosed is a method for detecting a combustion state of a boiler, and more particularly to a boiler and a method capable of exactly detecting an abnormal combustion state of a gas boiler using an air pressure sensor and a flame detection unit, thereby improving ef... | 09/06/2011 |
| 8011920 | Valve assemblies for heating devices In certain embodiments, a valve assembly includes a housing. The housing can define a first fuel input and a second fuel input. The housing can further define a first flow path, a second flow path, a third flow path, and a fourth flow path. The assembly can include ... | 09/06/2011 |
| 7950919 | Method and apparatus for monitoring and controlling the stability of a burner of a fired heater The invention includes method and apparatus for controlling the stability of a burner, preferably a low NOx burner, of a natural draft heater. The method includes measuring the draft over a time period and generating a measured output from which a draft f... | 05/31/2011 |
| 7922481 | Method for setting the air ratio on a firing device and a firing device The temperature generated by a firing apparatus, particularly a gas burner, depends on the mixing ratio between the quantity of air and the quantity of gas fed to the firing apparatus, characterized by the excess air coefficient λ, at a predefined burner load (air ... | 04/12/2011 |
| 7905722 | Control of an adjustable secondary air controller for a burner The present invention relates to a system and method for controlling a burner's adjustable secondary air controller. Specifically, the system relates to a control logic for the control of an air supply to a burner such as a natural gas burner used in the production ... | 03/15/2011 |
| 7901203 | Combustion chamber A combustion chamber (1), in particular in a gas turbine, has at least two burners (A-H) that are connected to a fuel supply (3) via controllable fuel valves (2′ and 2). Each burner (A to H) is assigned at least one optical measuring de... | 03/08/2011 |
| 7837462 | Combustion method and apparatus A burner has a port facing into a combustion chamber along an axis. A secondary fuel injector structure has secondary fuel injection ports that face into the combustion chamber at locations spaced radially outward from the burner port. A tertiary fuel injector struc... | 11/23/2010 |
| 7833009 | Oxidant injection method A method of combustion in a furnace comprising a firing zone and an exhaust zone, three oxidants and fuel comprising the steps of: introducing fuel into said firing zone; introducing a first oxidant into the firing zone; introducing a second oxidant into the firing ... | 11/16/2010 |
| 7789657 | Pressure regulator with bleed orifice A pressure regulator having a housing that defines a gas inlet, a gas outlet, and a reference pressure connector. A diaphragm is provided in the housing, where the diaphragm defines, at least in part, a reference pressure chamber. In some illustrative embodiments, t... | 09/07/2010 |
| 7651330 | Rotary valve arranged in a multi-gas cooker Cooking appliance (1A,1B) having an external and control panel (2,2′) equipped with one or more regulating valves, where the rotary regulator organ (6) is equipped with various peripheral openings (16-19) for supplying a f... | 01/26/2010 |
| 7641470 | Multi-gas cooker, with a rotary valve provided with interchangeable regulating means The cooking appliance (1) having a control panel (2) is equipped with one or more gas flow (Q) regulating valves, wherein the rotary regulating plug (6) is provided with various peripheral through holes (16-19). The control knob ( | 01/05/2010 |
| 7628606 | Method and apparatus for combusting fuel employing vortex stabilization The present method and apparatus for producing a supersonic jet stream introduce an oxidizer in such a manner as to create a vortex, which is then restricted. Fuel is introduced into a reduced pressure eye of the vortex, forming a stratified composite stream of gase... | 12/08/2009 |
| 7607913 | CO controller for a boiler A CO controller is used in a boiler (e.g. those that are used in power generation), which has a theoretical maximum thermal efficiency when the combustion is exactly stoichiometric. The objective is to control excess oxygen (XSO2) so that the CO will be continually ... | 10/27/2009 |
| 7594811 | Method pertaining to combustion, and a burner A method and apparatus relating to the combustion of a fuel with an oxidant in a heating furnace, wherein the fuel and the oxidant are delivered to a burner head. In a first method step fuel and oxidant are emitted from the burner head in close proximity to each oth... | 09/29/2009 |
| 7581945 | System, method, and article of manufacture for adjusting CO emission levels at predetermined locations in a boiler system A system, a method, and an article of manufacture for adjusting CO emission levels in predetermined locations in a boiler system are provided. The boiler system has a plurality of burners and a plurality of CO sensors disposed therein. The system determines location... | 09/01/2009 |
| 7566217 | Variable orifice combustor A variable orifice combustor unit 10 comprises an annular combustion chamber 12 extending about a central axis 14 and ending in a discharge nozzle 16. Charging of the chamber 12 takes place from combustion fuel and air supply chamb... | 07/28/2009 |
| 7559234 | Real-time combustion control and diagnostics sensor-pressure oscillation monitor An apparatus and method for monitoring and controlling the combustion process in a combustion system to determine the amplitude and/or frequencies of dynamic pressure oscillations during combustion. An electrode in communication with the combustion system senses hyd... | 07/14/2009 |
| 7479006 | Apparatus and methods for operating a cooking appliance A gas supply system for a cooking appliance includes a burner valve operatively coupled to each surface burner, and a lockout valve configured to control gas flow to a manifold. The burner valve is movable between an open position and a closed position to control ga... | 01/20/2009 |
| 7402038 | Combustion method and apparatus A burner has a port facing into a combustion chamber along an axis. A secondary fuel injector structure has secondary fuel injection ports that face into the combustion chamber at locations spaced radially outward from the burner port. A tertiary fuel injector struc... | 07/22/2008 |
| 7396228 | Fuel gas calorie control method and device Calories of a first mixed gas are predicted by calculations based on the mixed flow rate of a blast furnace gas and the mixed flow rate of a converter gas measured by flow meters, and preset blast furnace gas calories and converter gas calories; the flow rate ratio ... | 07/08/2008 |
| 7371065 | Apparatus and method for the controlled production of nano-soot particles In order to provide an apparatus for the controlled production of nano-soot particles, a pore burner and a mixing device for the production of a pre-mixture of fuel and oxidizing agent are provided, wherein the mixing device is coupled to the pore burner so that the... | 05/13/2008 |
| 7354265 | Flare stack combustion method and apparatus High-pressure air is discharged in the form of jets moving at a high velocity from nozzles mounted on a ring around the interior of the flare stack, placed at a predetermined distance from the flare tip and the portion of the surrounding stack wall downstream of the... | 04/08/2008 |
| 7344373 | Control method for gas burners The invention relates to a control method for gas burners for providing a gas-air mixture. According to the invention, the ionization signal is only used for setting the mixing ratio dependent on the gas quality when the burner flame completely sweeps over th... | 03/18/2008 |
| 7337022 | Constraint and limit feasibility handling in a process control system optimizer An optimization technique for use in driving a process plant controller, such as a model predictive controller, uses an organized, systematic but computationally simple method of relaxing or redefining manipulated, control and/or auxiliary variable constraints when ... | 02/26/2008 |
| 7335015 | Method for controlling or regulating a burner Method for controlling or regulating a burner (5) to which a defined air quantity (3) and fuel quantity (4) are fed, the exhaust gas (6) formed during the combustion being fed to a sensor (7), and the actual value (8) detect... | 02/26/2008 |
| 7330767 | Configuration and viewing display for an integrated model predictive control and optimizer function block An interface or display routine is provided for use in viewing and configuring a function block that performs integrated optimization and control within a process control system. The interface routine may enable a user to view or configure variables, values or other... | 02/12/2008 |
| 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 |
| 7306456 | Autocontrol burner and a combustion control method A combustion control method for a burner comprises: the fuel supplying means outputs a given amount of fuel oil to the fuel oil atomizing means; the fuel atomizing means sprays fuel atomized gas; said gas is ignited by the igniter; the amount of air is sent to facil... | 12/11/2007 |
| 7293388 | Adaptive control system In an insect lure and trap, a system for generating a carbon dioxide attractant has a combustion chamber in which carbon dioxide is generated by means of an exothermic reaction from a gaseous fuel rich in carbon. A container contains a pressurized supply of said fue... | 11/13/2007 |
| 7289032 | Intelligent flame scanner Techniques for determining a characteristic of a flame are provided by the present invention. Provided are methods as well as devices. A flame is monitored across a contiguous spectral range to detect light emitted by the monitored flame. The contiguous spectral ran... | 10/30/2007 |
