Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 6000391 | Positive air flow ventilation system A ventilation system for urging flue gases from an exhaust source through an exhaust conduit has an exhaust outlet for venting the gases and an exhaust inlet communicating with the exhaust source. A blower fan is provided for creating a positive air flow ... | 12/14/1999 |
| 5359945 | Balanced pressure solid fuel heating unit A method and apparatus for a pellet fuel burning heating unit for burning corn or wood pellets having a balanced pressure system having a four-way split combustion intake airstream. The invention includes a combustion air blower system for providing combu... | 11/01/1994 |
| 5351633 | Balanced pressure solid fuel heating unit A pellet fuel burning heating unit having a firebox with a burner therein connected to a combustion air duct, an exhaust pipe to remove combustion gases from the firebox, a blower to provide combustion air and a pressure regulator and air splitter to divi... | 10/04/1994 |
| 4920866 | Anti back draft device for flue Back draft is prevented in a conventional furnace or woodstove system in which the combustion gases are generally sufficient to generate the positive draft for combustion but occasionally fails due to pressure differences, combustion conditions or outside... | 05/01/1990 |
| 4773385 | Universal energy adaptor increaser This invention is an attachment for installation along a flue duct between a heater and a chimney, including a flue duct section, having a jet tube therein, receiving air from an exterior motor-driven fan, so as to create a vortex and a third stage burner... | 09/27/1988 |
| 4768444 | Common vent device for positive vent pressure and draft hood equipped gas appliances A vent device is provided for common venting of exhaust gases discharged from separate apparatus at different vent pressures. The vent device provides a passageway and exhaust gas inlets for combining the exhaust gases and conveying them to a single vent ... | 09/06/1988 |
| 4674417 | Improved stack construction for an incinerator An improved stack construction for an incinerator. A layer of refractory material is disposed on the inner surface of the stack and an elongated tubular member is positioned longitudinally within the stack and spaced from the layer of refractory material ... | 06/23/1987 |
| 4649807 | Method for preventing dust depositions or build-ups in off-gas channels of electrothermal smelting furnaces A method for preventing deposits or build-ups of dust in off-gas channels for dust-containing off-gases from electrothermal smelting furnaces. This is done by blowing an additional gas tangentially into the furnace off-gas channels at the positions where ... | 03/17/1987 |
| 4638632 | Exhaust gas pipe cooled by ambient air An exhaust pipe outlet is surrounded by a jacket part having an inlet of ger diameter, permitting air to be drawn into the jacket part to isolate it from contact with the hot exhaust gases. Blocking air may be injected at the downstream end of the jacket... | 01/27/1987 |
| 4512264 | Induced stack draft apparatus An apparatus to induce drafts in combustion chamber stacks can operate at temperatures from 1400° to 2600° while being fabricated from mild steel with refractory lining. The induced draft apparatus includes an exhaust stack connected to a combustion cha... | 04/23/1985 |
| 4487137 | Auxiliary exhaust system An auxiliary exhaust system for use with a flue includes a conduit communicating at one end with an opening formed in the flue wall and a blower operable to introduce auxiliary air into the flue through the conduit. The conduit is angled so that the auxil... | 12/11/1984 |
| 4466340 | Chimney assembly A prefabricated chimney assembly of the dual-wall type, adapted to be coupled to the flue outlet of a fireplace, is disclosed. The chimney assembly includes an inner conduit extending the length of the chimney assembly to form the flue through which combu... | 08/21/1984 |
| 4452152 | Incinerator steam generation system A new and improved incinerator steam generation system subjecting to combustion debris such as municipal waste, utilizing the heat derived therefrom to produce steam for steam boiler, electrical generating facilities, heating facility for industrial or co... | 06/05/1984 |
| 4380189 | Industrial chimneys with forced draught A chimney comprises a central column through which the combustion gases or the like are forced, this column terminating at its upper end in a nozzle of smaller cross-section, and an outer wall which surrounds the column while leaving an annular intermedia... | 04/19/1983 |
| 4365543 | Lining system for chimneys and ducts There is provided a method of constructing a chimney or duct, which comprises an external structural wall, a protective layer of moving air adjacent to and inwardly therefrom, and curved ring devices situated in the gas stream which by their shape control... | 12/28/1982 |
| 4285325 | Balancing air device for a heating unit A balancing air device for a heating unit in a building having a flue for the passage of waste combustion gases from a combustion chamber of the heating unit into a stack capable of having a draft flowing therein, comprising, a fresh outside air line conn... | 08/25/1981 |
| 4194488 | Home heating system In a home heating system having a furnace with a combustion chamber for burning fuel and creating heat, and a chimney with a draft therein, an improvement comprising, an exhaust flue connected between the combustion chamber and the chimney for venting hea... | 03/25/1980 |
| 4149453 | No-plume device An apparatus for discharging to the atmosphere, combustion gases containing sulphur trioxide, means are provided for injecting into the stream, prior to venting to the atmosphere, a selected quantity of diluting gas. The diluting gas and sulphur containin... | 04/17/1979 |
| 4033269 | Method and apparatus for controlling gas flow Flow of gas through a conduit of a gas-handling system, particularly the exhaust system of a material processing furnace operating at high temperatures, is controlled by directing a control gas (usually air) into the conduit in opposition to the normal fl... | 07/05/1977 |
| 3994210 | Jet fume control systems This invention provides a method and apparatus for exhausting rising fume from a fume-producing apparatus into a hood opening located above but laterally displaced from the fume-producing apparatus. A first jet producing a moving curtain of air is directe... | 11/30/1976 |
| 3987631 | Method and apparatus for cooling heat engines A heat engine producing a hot gas is cooled by a fluid which in turn is cooled by the convective updraft of air in a cooling tower. The convective updraft is increased by adding a portion of the hot gas to the air in the cooling tower downstream of the he... | 10/26/1976 |
| 3961587 | Combustion equipment in which humid combustible excreta and disposed materials such as livestock excreta, paper sludge can be burnt spontaneously A furnace for the combustion of moist waste materials having an axial combustion chamber surrounded in part by two communicating air jackets between which air jackets the waste combustible material is disposed, air being forced through the air jackets int... | 06/08/1976 |
