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...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.

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Class 431/121 - WITH APPARATUS CLEANING, PURGING OR SCAVENGING MEANS


Subclass of Class 431 - Combustion
Definition: Apparatus having (1) means for cleaning or facilitating
No. of patents: 51
Last issue date: 10/28/2008


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NumberTitleIssue Date
7442034Detonative cleaning apparatus
An apparatus for cleaning a surface within a vessel has an elongate combustion conduit extending from an upstream end to a downstream end. The downstream end is associated with an aperture in the wall of the vessel and is positioned to direct a shockwave toward the ...
10/28/2008
7435080System and method for flame stabilization and control
A system and method for providing continuous measurement and control of a combustion device by altering the fuel composition delivered thereto. The system includes devices for sensing related information, such as fuel characteristics, combustion characteristics, or ...
10/14/2008
7377771Apparatus for the thermal treatment of process exhaust gases containing pollutants
The invention relates to an apparatus for the thermal treatment of process exhaust gases containing pollutants, which can be used for a very wide range of surface modification processes carried out under a vacuum. The intention is to achieve the object of thermally ...
05/27/2008
7313916Method and apparatus for generating power by combustion of vaporized fuel
An apparatus for producing power from a source of liquid fuel. The apparatus includes at least one capillary flow passage, the at least one capillary flow passage having an inlet end and an outlet end, the inlet end in fluid communication with the source of liquid f...
01/01/2008
7082948Method of and apparatus for automatically coating the human body
In a system for coating human skin, a chemical composition, such as a cosmetic or medical formulation, is uniformly coated over the entire body or selected parts of the body of the person being coated. The system includes atomization of the coating composition, cont...
08/01/2006
7048536Temperature-compensated combustion control
The “fuel-air pressure ratio” combustion control system for maintaining a selected fuel-air ratio for a combustion apparatus supplied with air at a substantially constant volumetric rate is improved by means for adjusting the flow rate of fuel in relation to tem...
05/23/2006
7041089Automated system for coating the human body: virtual motion
In a system for coating human skin, a coating composition, such as a cosmetic or medical formulation, is uniformly coated over the entire body or selected parts of the body of the person being coated. The system includes atomization of the coating composition, conta...
05/09/2006
6132203Method and apparatus for burning oils of varying viscosity
Disclosed is an oil burning system that is capable of burning oils of varying viscosities, including high viscosity waste oils and low viscosity heating oils. Suitable as a new installation or a retrofit modification, the present invention incorporates th...
10/17/2000
5964585Oil burner for ensuring combustion of long-term stored kerosine
An oil burner capable of ensuring normal combustion of quality-deteriorated kerosine. A burner body including a vaporization section is fed with fuel and air from a fuel pump and an air fan, respectively. A combustion control unit controls the fuel pump a...
10/12/1999
5827053Positive flow purge system for microflame torch
A positive flow purge system for a microflame torch including a source of combustible gas, a source of non-combustible gas and a gas valve having first and second gas inlets and a gas outlet. A first gas line connects the source of combustible gas to the ...
10/27/1998
5785941Process for preparing finely divided silica and apparatus for carrying out the process
A process for preparing finely divided silica by reaction of gaseous or vaporizable silicon compounds in a mixture with gases forming water on combustion with air or oxygen in a flame includes producing discharges of gas in the combustion chamber by means...
07/28/1998
5490974Tubular heater for preparing carbon monoxide-containing gas mixtures
The tubular heater comprises numerous tubes, which are disposed in a combustion chamber and contain catalyst. A synthesis gas, which mainly comprises hydrogen, carbon monoxide, and carbon dioxide, is prepared in the tubes. There is a risk of a formation o...
02/13/1996
5486107Determination of fuel characteristics
A method of determining thermophysical or thermochemical parameters of a fuel gas is disclosed which has wide application both as to applicable fuels and applicable parameters. A relationship has been discovered that allows the determination of many param...
01/23/1996
5462429Mechanical wiper for waste gas incinerator
A mechanical wiper mounted within an incinerator for waste gases, such as silane, and said wiper adapted to move adjacent selected internal surface areas to remove combustion products buildup on such selected areas....
10/31/1995
5408970Electronically controlled continuous flow fuel system
An electronically controlled fuel system for use with a continuous, non-cyclical process has a fuel manifold to which pressurized fuel from a source is supplied and through which the fuel is metered, to an end use combustor, by a periodically energizable ...
04/25/1995
5376181Nozzle assembly
A nozzle assembly which comprises nozzle duct having inlet and discharge ends is provided with a tubular support. The support has a first end in fluid communication with the nozzle duct adjacent the discharge end thereof. The second end of the support ext...
12/27/1994
5238397Device for the combustion of viscous fluids
An apparatus for combustion of viscous liquids such as tar from gas filters or the like includes a tank with heating elements, a burner unit and pipe connecting the burner with the tank. The pipe extends into the tank, and an end of the pipe within the ta...
08/24/1993
5090451Combination steam and fuel oil supply and purge valve with recirculation feature
An improved combination steam and fuel oil supply and purge valve has a steam valve and actuator member which provides for a closed position, a purge operation with communication established between a steam supply line and a discharge line leading to an o...
02/25/1992
4913646Combustion device
In a combustion device for burning a liquid atomized fuel with an oxygen containing gas and in which ejectors using oxygen as driving gas are sucking admixed exhaust gases into a space adjacent to a fuel supply nozzle, the inventive feature is to provide ...
04/03/1990
4828483Method and apparatus for suppressing NOx formation in regenerative burners
A method and apparatus for repressing NOx formation in twinned regenerative burner pairs includes inducing a stream of hot flue gas, preferably containing enriched products of combustion, from the main hot flue gas exhaust stream and vitiating the preheat...
05/09/1989
4823843Valve apparatus
In a valve system for controlling the flow of liquid fuel and steam to a nozzle in a large scale power plant boiler, a pair of valves are operated by rotary pneumatic actuators. Three-position operation is achieved for one of the valves by coupling the va...
04/25/1989
4776705Thermocouple for use in a hostile environment
A thermocouple system for use in a high temperature reactor wherein a carbonaceous fuel is burned to produce a usable gas and a residual slag. The thermocouple is enclosed in a gas tight metal protection sheath which is inserted inside a multi-segment ref...
10/11/1988
4767316Fuel supply system for oil burner
The fuel supply system includes an air pipe which is connected between a fuel oil supply pipe and an inlet side of a forced air passage and is provided at a middle portion thereof with an elevation positioned above any portion of the fuel supply pipe betw...
08/30/1988
4704085Deodorizing device for oil stove
A movable wick type oil stove which comprises a wick for absorbing oil to provide a fire at the top of the wick, wick cylinders defining a space for disposing the wick therein means for moving the wick in the vertical direction along the wick cylinders, a...
11/03/1987
4668179Oil burner of the wick ignition type
An oil burner of the wick ignition type is disclosed which is capable of effectively preventing the generation of bad odor due to unburned fuel oil gas after the fire-extinguishing operation as well as during the operation. The oil burner includes an air ...
05/26/1987
4650416NF3 combustor for cylindrical laser
A combustor using D2 /NF3 /He is used in a laser gain generator in a cylindrical gas laser. The combustor includes a plurality of primary rings having fuel, oxidizer and diluent orifices therein. Fuel and oxidizer orifices form a tri...
03/17/1987
4639211Deodorizing device for oil stove
A movable wick type oil stove which comprises a wick for absorbing oil to provide a fire at the top of the wick, wick cylinders defining a space for disposing the wick therein means for moving the wick in the vertical direction along the wick cylinders, a...
01/27/1987
4604050Method of cleaning nozzles in a fluidized bed
The combustion gas passages leading to a fluidized bed in a hot water or steam boiler are kept free of deposits which might block them by pulses of gas. The gas pulses may be generated from a pressurized reservoir with periodic or aperiodic openings of a ...
08/05/1986
4533316Vaporizing type fuel combustion apparatus with tar removal device
There is disclosed a combustion apparatus of a fuel vaporizing type wherein fuel is led to a fuel injector for vaporization and the vaporized fuel is fed to a burner via a gas nozzle for combustion. The combustion apparatus features the provision of a dev...
08/06/1985
4509914Apparatus for the combustion of liquid fuels in the gaseous state
A method for the combustion of liquid fuels in the gaseous state comprising the steps of evaporating fuel in a gasification chamber and burning the gasified fuel after it leaves the gasification chamber with a controlled amount of air. This is controlled ...
04/09/1985
4504214Control valve for a burner with shutoff characteristics
A control valve for a resonant burner having a burner space for receiving active substance through a conduit with an atomizing nozzle discharging into the space is disclosed. When the valve is shut off to terminate flow of the active substance through the...
03/12/1985
4472133Method of operating a vapor burner for liquid fuel and vapor burner and control device for performing said method
A self cleaning vapor burner for liquid fuel in communication with a combustion chamber. The burner includes an electrically heated evaporating tube. The supply of liquid fuel is periodically interrupted to the evaporating tube wherein the tube is heated ...
09/18/1984
4465458Apparatus for burning liquid fuel equipped with heating-type fuel vaporizer
A liquid fuel combustion apparatus for evaporating and vaporizing kerosene, gas oil or like liquid fuel by heating, admixing air with the vaporized fuel in a specified ratio and burning the resulting gaseous mixture in a combustion unit. The vaporizer for...
08/14/1984
4453914Low heat loss laser combustion chamber
A low heat loss combustion chamber for a gain generator assembly is shown. The gain generator assembly operates in a cylindrical gas laser. The combustion chamber includes a plurality of primary rings having fuel and oxidizer injectors therein as well as ...
06/12/1984
4424017System and method for burning liquefied gases
A system for burning a liquefied gas comprises a burner gun for spraying the liquefied gas into a combustion space, a pump for feeding the gas under pressure, pipe means connecting the burner gun with the pump, and a flow regulating valve provided in the ...
01/03/1984
4354519Non-drip valve apparatus
A no-drip valve apparatus for regulating a fluid flow from an inlet to an outlet. A pressure activated supply valve means controls the flow of fluid through the valve. A partition member cooperates with a vacuum chamber to retract and retain any remaining...
10/19/1982
4333746Gas conditioning means for a plurality of boilers
A gas conditioning means for a plurality of boilers and more particularly an improved means for providing a conditioning mixture of sulfur trioxide (SO3), from a single system, for injection into the flue gas streams of a plurality of boilers f...
06/08/1982
4270561Valve for a burner system
A valve for incorporation in a fuel line, between a pump and a fuel burner, has a valve chamber and a valve member in the chamber. The valve member normally closes a connection from the pump to the burner, but opens this connection in response to a suitab...
06/02/1981
4265613Safety device for an oil burner
A safety device for an oil burner includes a pump which has a drive cylinder portion with a double-acting piston movable therein which is connected through a connecting rod to a suction piston portion which is movable in a suction portion of the pump cyli...
05/05/1981
4170489Process for cleaning jet engine nozzles
A process is provided for cleaning residue fuel varnish and carbon from the fuel nozzles and guide vanes of a jet engine. The process involves dispensing a detergent and water solution under sufficient pressure through the fuel nozzles themselves to scrub...
10/09/1979
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