Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7017313 | Ceiling leak capture and drainage system A fluid leak capture and drainage system for ceiling leaks which includes a ceiling panel support grid and a plurality of ceiling panels mounted thereon is disclosed. The ceiling panel has at least one raised section located within the panel and a wall extending alo... | 03/28/2006 |
| 6787116 | Overmolding insert for heat exchanger, process for manufacturing a heat exchanger, and heat exchanger produced thereby An overmolding insert includes a base having at least one opening in a first surface, the opening communicating with a second surface opposite the first surface, at least one hollow projection extending from the first surface, the hollow projection having a first op... | 09/07/2004 |
| 6701914 | Installation for storing thermal energy The installation stores thermal energy, i.e., heat energy and/or cold energy. A plurality of conduits are laid underground. Several regions that are arranged one inside the other and contain energy-saving material and conduits respectively are provided. T... | 03/09/2004 |
| 4918938 | Heat exchanger A water heater includes a metallic water tank having a generally vertical orientation in use. A tube for carrying a refrigerant fluid is heat-conductively bonded about the outer surface of the wall of the tank while held under tension. The tube is formed ... | 04/24/1990 |
| 4911228 | Apparatus for heating and cooling liquids A heat transfer system for liquids comprising a liquid container internally divided by an impervious flexible membrane into first and second liquid compartments, the first compartment including first liquid inlet port adapted for connection to a supply of... | 03/27/1990 |
| 4727856 | Solar water heating and storage system An improved solar water heating and storage system is disclosed characterized by use of physically separated yet thermally interfaced solar collector and domestic water storage reservoirs. The reservoirs and conduit systems are designed to provide a therm... | 03/01/1988 |
| 4621616 | Annular solar panel Five concentric annular conical beam concentrators mounted above a black-water heat-transfer tank through which domestic household water circulates in tubes. The conical beam concentrators receive convergent conical incipient beams of diffused sunlight an... | 11/11/1986 |
| 4513732 | Passive integral solar heat collector system The present invention relates to an improved apparatus for collecting, absorbing, transferring, and storing solar heat energy, economically and passively, without pumps or electric power. The apparatus comprises a solar collector with a flat finned heat p... | 04/30/1985 |
| 4416256 | Solar water heaters The present invention provides a solar heater which comprises a water storage tank having a cold water inlet and a hot water outlet, an instantaneous gas fired water heater operatively connected to the hot water outlet of the water storage tank, a first, ... | 11/22/1983 |
| 4388916 | Steam generation apparatus A steam generation apparatus includes a primary source of hot water supplied to an enclosed hot water receptacle maintained at a pressure of approximately 300 psi. Supply and return lines pump the hot water in a recirculating manner through a serially con... | 06/21/1983 |
| 4343294 | Solar collector assembly A plurality of individually adjustable flat mirrors on a common bed of a solar collector assembly reflect the sun's rays into a tubular collector where water is converted to steam for selectively either driving a motor of refrigeration system which cools ... | 08/10/1982 |
| 4338917 | Low temperature solar furnace and method This disclosure generally relates to a technique and apparatus for solar heating which may be adapted for heating residential, commercial or industrial buildings, and in which the functions of solar energy collection, storage and heat-exchange are combine... | 07/13/1982 |
| 4307708 | Solar heated building A solar heating system for a building is disclosed. The solar heating system includes a solar collector and conduits leading from the solar collector to a plurality of heat sinks. The conduits contain an antifreeze solution for carrying the heat from the ... | 12/29/1981 |
| 4258701 | Solar collector panel A heat transmission module wherein a natural-circulation, solar collector, storage tank, insulation and other interrelated parts are fabricated as a unitary structure capable of bearing a load.... | 03/31/1981 |
| 4212287 | Insolation integrator An electric signal representative of the rate of insolation is integrated to determine if it is adequate for operation of a solar energy collection system.... | 07/15/1980 |
| 4211209 | Method and apparatus for collecting and domestic use of solar heat A solar heating system utilizing planar solar collector panels having a low specific heat fluid passing therethrough transfers the heat from the low specific heat fluid to water in a thermal storage unit using a finned heat exchanger embedded in a layer o... | 07/08/1980 |
| 4159017 | Solar panel system A solar heating panel has a rectangular frame to receive a rectangular metal pan which supports a continuous coil of water tubing which is attached thereto by strips of metal attached to the pan. Preferably, the frame is divided into quadrants by rails. E... | 06/26/1979 |
| 4153104 | Solar heating and cooling system A solar-energized heating and cooling system for a building utilizes solar heated water and a hot storage tank to provide space heating, to provide domestic hot water, and to operate absorption type refrigerating apparatus which cools water to be stored i... | 05/08/1979 |
| 4144999 | System and structure for conditioning air A system for storing in a liquid storage medium a substantial part of the heat for a building. The liquid is contained within a large, vertical, cylindrical tank and is circulated to heat-receiving, or solar heated, structures and back to the tank. The st... | 03/20/1979 |
| 4117882 | Process and apparatus for heat exchange A process and apparatus is provided for storing thermal energy and subsequently releasing and extracting the stored thermal energy upon demand. At least one sealed container of salt hydrate is agitated continually and is positioned in heat exchange relati... | 10/03/1978 |
| 4049194 | Fireplace/forced air furnace heat generation and distribution system The present heat generation distribution system comprises a forced air central furnace heating system having combined therewith an open hearth fireplace heat exchanger device connected in a manner that there is a positive pressure within the fireplace hea... | 09/20/1977 |
