...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 7172412 | Pyrolysis heater A pyrolysis heater particularly for the cracking of hydrocarbons in the production of olefins has a burner arrangement in the firebox which includes staged combustion low NOx hearth burners firing upwardly in the firebox adjacent to the walls. Wall stabil... | 02/06/2007 |
| 7117866 | Multi-faceted grill A grill having a top wall design incorporating a heat source that efficiently radiates heat towards the cooking cavity but allows the escape of flue gases and hot air towards the rear of the grill to protect the user. The grill has an access to the interior of the c... | 10/10/2006 |
| 6932080 | Arrangement of burner and heat exchanger, and air-heating apparatus Arrangement of a burner (2) and a heat exchanger (1), the heat exchanger (1) including a plurality of heat exchange elements (3) interconnected to each other with intermediate gaps, the heat exchanger (1) being arranged with an inl... | 08/23/2005 |
| 6712601 | Low power starter for catalytic heaters A catalytic heater 10 has an insulation pad 36 and a catalyst pad 34 mounted in face-to-face relation within an enclosure 11 having an open front face 20. A starter 48 is mounted within the catalyst pad and is effective for ... | 03/30/2004 |
| 6431856 | Catalytic combustion apparatus In order to realize a catalytic combustion apparatus capable of effectively utilizing radiation from a surface of a catalytic element, providing a higher efficiency of heat exchange, and characterized in superior characteristics of an exhaust gas, a catal... | 08/13/2002 |
| 6397834 | Brown gas heating furnace made of mineral stone The Brown gas heating furnace made of mineral stone maintains a desired temperature with a small amount of fuel. The brown gas heating furnace includes a hollow base, having burner mounting holes formed in a top wall of the base, and a door mounted at a f... | 06/04/2002 |
| 6244856 | Burner assemblies A burner assembly includes a number of gas burners each utilizing a radiant ceramic plaque, the burners are disposed in confined combustion chambers where they direct heat towards a heat-receiving surface so that by this arrangement the plaque receives a ... | 06/12/2001 |
| 6213757 | Advanced emissive matrix combustion A combustion device comprises a porous distributive layer, a combustion chamber disposed downstream of the porous distributive layer, and an emissive matrix in an active flame zone in the combustion chamber of the device downstream from the porous distrib... | 04/10/2001 |
| 6159001 | Advanced emissive matrix combustion A superemissive combustion device of this invention comprises a porous distributive layer and an apparatus for delivering a fuel/oxidizer mixture to an upstream face of the porous distributive layer. A superemissive advanced emissive matrix in is disposed... | 12/12/2000 |
| 6024083 | Radiant tube burner nozzle A nozzle for a recuperative radiant tube burner system is constructed to provide uniform combustion along the length of the inner tube. The nozzle includes combustion air ports disposed at compound angles and having different axial components to provide s... | 02/15/2000 |
| 6012444 | Radiant cooking with burners mounted over the cooking medium The present invention provides a fast cooking system through the use of an oven having radiant burners located interiorly at the top portion thereof. The oven includes a rotary spit on which the meat is supported and rotated to prevent burning. A blower i... | 01/11/2000 |
| 5524606 | Air heater Air heater comprising a gas burner and heat exchange means including at least one heat-exchange wall which separates a first passage for flow of air to be heated from a second passage for flow of the flue gases produced by the burner, the air to be heated... | 06/11/1996 |
| 5483948 | Compact gas-fired infrared radiator of closed design A gas-fired infrared radiator comprising a closed housing which includes a combustion chamber, with a side of the radiator that is to be directed towards an object being a radiation plate which forms a boundary of the combustion chamber, and comprising at... | 01/16/1996 |
| 5429112 | Infra-red radiant tube heater A gas radiant tube heater and method of operating the heater. The heater has a housing and a radiant tube mounted within the housing. The heater further has a modular control box mounted within the housing in which serviceable parts can be easily removed ... | 07/04/1995 |
| 5139011 | Unvented gas-fired heater An unvented gas-fired heater assembly including a base having a gas burner mounted thereon in a combustion area. Gas logs are disposed in the combustion area for heating by the gas burner. A duct assembly is provided which directs heated air from the heat... | 08/18/1992 |
| 5102331 | Radiant wall oven with temperature control A radiant wall oven with a heating chamber and hot air chamber separated by a radiant wall, an air heating chamber, supply and return ducts between the air heating chamber and hot air chamber and blower means for circulating hot air through the ducts is p... | 04/07/1992 |
| 4951649 | Method and apparatus for heating and generating infrared rays The apparatus for heating and generating infrared rays has a heating apparatus for indirectly heating a heat medium such as air and water, by a combustion heat and a radiator, wherein a branch combustion gas passage is provided for a combustion gas passag... | 08/28/1990 |
| 4674475 | Gas fired furnace A direct-fired make-up furnace comprises a cabinet which houses an air blower. A gas fired burner located in a sloped passage, which is formed by walls of a return air compartment and a by-pass air compartment, radiates heat at an angle relative to the bl... | 06/23/1987 |
| 4664620 | Heater with zone-controlled radiant burners Zone-controlled radiant burners are provided for retrofit installation in existing heaters. The burners comprise hollow cylindrical fiber matrix layers with baffles forming separate plena. A main stream of pre-mixed fuel and air is directed into the middl... | 05/12/1987 |
| 4606284 | Underfeed stokers The underfeed stoker has a retort (6) which is located at a height `h`, an arch having a minimum width `w`. The ratio of the minimum width `w` to the height `h` is greater than 1.5 and less than 2.... | 08/19/1986 |
| 4543940 | Segmented radiant burner assembly and combustion process A segmented radiant burner assembly for installation in the combustion chambers of firetube boilers and the like. The individual segments can be assembled together for on-site installation within the boiler. The segments include support structures compris... | 10/01/1985 |
| 4531508 | Gas-fired convector or convector/radiant room heating appliance A gas-fired condensing convector or convector/radiant room heating appliance comprising a sealed combustion chamber 12 communicating with a baffled heat exchanger 21, a gas burner 13 within the chamber 12 fed with forced or induced air for combustion from... | 07/30/1985 |
| 4524753 | Infra-red heating apparatus An infra-red heating apparatus includes a radiating surface and an adjacently located black body receiver spaced from the radiating surface. A fuel supply plenum is located adjacent to the radiating surface to provide jets of fuel along the radiating surf... | 06/25/1985 |
| 4493310 | Heat exchanger A heat exchanger for use with a source of heat in the form of a burner arrangement. The heat exchanger includes a relatively high flow resistance main passage for collecting combustion products from directly above the burner and a low flow resistance seco... | 01/15/1985 |
| 4480628 | Fuel efficient oven A heat exchanger for use with a portable oven. The disclosed heat exchanger maximizes the conversion of heat caloric content of a combustible fuel to useable heat energy. A gas fueled infra-red burner mounted above the heat exchanger directs radiant energ... | 11/06/1984 |
| 4413612 | Red-hot type oil burner A red-hot type oil burner capable of effectively accomplishing uniform vaporization of a fuel oil during the normal combustion operation. A heat transfer means is provided between a combustion chamber and a vaporization chamber to transmit a part of combu... | 11/08/1983 |
| 4412523 | Catalytic gas-fired furnace system and method A gas-fired, forced air furnace system employing a fiber matrix burner element and a condensing-type heat exchanger to achieve both high system thermal efficiency and low emission of NOX and other gaseous pollutants. The value of excess air in ... | 11/01/1983 |
| 4053279 | Fuel-fired, radiant heater A radiant heater is provided with a fuel-fired radiant housed in a combustion chamber having a wall with a radiation-transmissive panel. A plenum adjacent the combustion chamber is provided with air under pressure greater than that in the combustion chamb... | 10/11/1977 |
| 3930488 | Heating panel for use in explosion-prone furnaces A heating panel for use in explosion-prone furnaces comprises a heating element on the inner side thereof, and on the outer side of the heating element a series of spaced parallel sheets of aluminum foil which, in the case of an explosion, simply blow out... | 01/06/1976 |