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 |
| 7081728 | Apparatus for controlling heat generation and recovery in an induction motor An induction motor system comprising an induction motor, equipped with a heat recovery and water pumping apparatus and an apparatus for controlling the electrical efficiency and resulting heat generation of the induction motor. The motor is adapted to be coupled to ... | 07/25/2006 |
| 7066729 | Gas powered heat delivery system A gas powered heat delivery system, comprising a fuel gas supply, a catalytic heater connected to the fuel gas supply; a tank containing fluid, the tank being disposed to receive heat from the catalytic heater; a one way conduit having an inlet for receiving fluid f... | 06/27/2006 |
| 7011300 | Steam humidifier and method The steam humidifier fed with a premix of natural gas and forced air under low pressure (less than 1 psi) includes a main frame, a movable lower frame, a two part evaporation canister, releasably sealed, for water, an immersible combustion chamber retaining a radian... | 03/14/2006 |
| 6877670 | Boiler ventilation system A method of ventilating a boiler system (10) during boiler system outages includes shifting (64) to the ventilation system (11) by stopping (70) the boiler system induced draft fan (32), closing (71) an internal isolation da... | 04/12/2005 |
| 6857578 | Combination water heating and space heating apparatus and control therefor A combination water heating and space heating apparatus includes a water heating unit and a space heating unit. The water heating unit has a water storage tank, a heating device for heating water stored in the tank, and a first temperature sensor for sensing water t... | 02/22/2005 |
| 6813631 | Automatic self configuration of client-supervisory nodes A system of controllers act as nodes on a network. One controller is identified as a supervisory node and the remaining controllers are identified as client nodes with the supervisory node and each client node broadcasting a default identifier, created at the time o... | 11/02/2004 |
| 6647302 | Human interface panel for boiler control system A method of analyzing information from a boiler control system includes providing a series of status modes with each status mode represented as an input condition to be tested. A relative priority structure is established among the status modes and a uniq... | 11/11/2003 |
| 6536678 | Boiler control system and method A method for operating a boiler including sensing a demand for heat and generating and ignition request to a flame safety controller. An ordered succession of evaluation modes compares normal operation to actual operation of control devices through the st... | 03/25/2003 |
| 5964215 | Heating installation with closed liquid circuit The invention relates to a heating installation comprising a closed liquid circuit which is under pressure during operation, in which are incorporated a heating boiler in which heat is supplied to a liquid circulating in the circuit and heat-generating me... | 10/12/1999 |
| 5881952 | Heater for liquids A heating system is provided with a closed circuit system for a first liquid, a pass-through system for a second liquid and a controller. The closed circuit system has a primary heater with a first heat exchanger, a second heat exchanger and a circulating... | 03/16/1999 |
| 5118039 | Domestic hot water heating control circuit for furnace control systems Domestic hot water heating control circuit is used in conjunction with a furnace control unit of a hot air furnace system which utilizes a hot water heat exchanger. The hot water control circuit has a diverter valve which is electrically connected to a th... | 06/02/1992 |
| 5060601 | Water-tube boiler and a heating installation equipped with such a boiler A water-tube boiler is disclosed, comprising a body in which are located the furnace and a series of vertical tubes serving as heating and exchange surface between the furnace and the water to be heated flowing through these tubes, two respectively upper ... | 10/29/1991 |
| 4714194 | Housing for wall mounted heating unit A sheet metal housing for containing a heater unit including an electric resistance heating element and a fan for circulating air through the heating element, and for protectively supporting such a heater unit within the interior space of a vertical build... | 12/22/1987 |
| 4705213 | Heat unit recycler A heat unit recycler for the exchange of air in a room includes an enclosed tank containing a liquid to be heated. A heating mechanism is provided for heating the liquid in the tank and a temperature control is provided for controlling the heating device ... | 11/10/1987 |
| 4638943 | Method of heating any building or room and apparatus for carrying out the said method The present invention relates to a method and an apparatus for heating a building, room or any like space characterized in that it combines into a unit a hot-water generator constituted by a fan associated with a water-air exchanger with high thermal iner... | 01/27/1987 |
| 4519540 | Sealed gas heater with forced draft and regulation by microprocessor The invention concerns a control device for gas boilers. The overall functions involving control and safety are ensured by a control box (26) with microprocessor which centralizes data collected from the ambient thermostat (27), the temperature sensor (28... | 05/28/1985 |
| 4496099 | Low pressure heating system A low pressure system for extracting heat from the fire combustion zone within a fireplace, wood or coal burning stove, or the like, and for automatically distributing it within a region adjacent to the fire. Preferably the apparatus includes a first heat... | 01/29/1985 |
| 4424934 | Hot water heating system A hot water heating system wherein an air-to-water heat exchanger is attached to the outside of a jacketed space heater, and a fan draws hot air through an opening in the jacket and downward through the heat exchanger.... | 01/10/1984 |
| 4337893 | Multi-phase modular comfort controlled heating system A circulating fluid that is heated by a number of gas-fired burner assemblies is used to heat a space either through a hot water system or a forced air heating system. Each burner assembly includes a housing with a heat exchanger mounted therein and a gas... | 07/06/1982 |
| 4274581 | Package heat exchanger system for heating and cooling A compact heating and cooling system in which air ducts are connected to a host exchanger system through which a coolant fluid from a condensing unit or a heating fluid from a compact water heater is selectively directed by a control circuit so that the s... | 06/23/1981 |
| 4257556 | Fluid heat transfer system Only a limited number of organic or silicone liquid phase thermal exchange fluid types are suitable for operation over a wide range of hot and cold temperatures and these have an undesirable property of degrading at high temperatures. It is accordingly de... | 03/24/1981 |
| 4243176 | Sealing and air/fuel mixture flow metering plate for gas furnaces An orifice plate for metering a mixture of fuel and air to a blower for supply of the mixture to a burner positioned in a central plenum of a heat exchange system, the present plate further provides the sole sealing structure necessary for sealing conduit... | 01/06/1981 |
| 4158438 | Self-pumping water boiler system A package heat exchange system using an expanded surface gas-fired burner to supply heat via a heat exchange coil in a dome above the extended surface heat exchanger which heats domestic hot water and supplies heat via the dome to a radiator for heating a... | 06/19/1979 |
