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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7174734 | Refrigerator damper with PTC heater actuation A damper in a refrigeration system having a first compartment and a second compartment connectable through a passageway is provided. The damper comprises a damper door, a temperature responsive unit, and a heating element. The damper door is moveable between an open... | 02/13/2007 |
| 6404321 | Actuator An actuator for a device such as a valve controlling coolant for an automotive engine. The actuator has a base body on which is supported an electrically heatable thermostatic operating element having an operating piston that moves a motion transfer membe... | 06/11/2002 |
| 5669373 | Thermostatic regulated air flow controller The invention concerns a thermostatic air flow controller. Such flow controllers may be specially useful for controlling the intake of air to a heating stove. The controller has a main air passage with a set of matching register plates which may open or c... | 09/23/1997 |
| 4530346 | Mechanical thermostat having proportional control for a solid fuel-burning stove A mechanical thermostat for modulating the temperature of a solid fuel-burning stove, including a casing, a thermostat coil mounted in the casing to sense the stove wall plate temperature; a downwardly-spaced air admission mechanism. The air admission mec... | 07/23/1985 |
| 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 |
| 4479483 | Safety stovepipe damper assembly A safety stovepipe damper assembly designed for use with a conventional type stovepipe and damper as used on coal, wood, or waste burning stoves. Provisions are made for presetting the damper to a specific low fire or closed position. A latch is also prov... | 10/30/1984 |
| 4467957 | Flue flow regulator A temperature-dependent flow regulator for a combustion exhaust flue comprises a vent pipe connected to the flue by a first end, the opposite end having a movable valve member disposed therein, and thermostatic expansion means sensing the temperature of t... | 08/28/1984 |
| 4395225 | Burner operated with liquid fuel for heating devices A burner for use with liquid fuels in heating devices, especially vehicle heaters, as a low pressure atomizer arranged at one end of a combustion chamber that includes a burner insert and a nozzle projecting into an end of the burner insert that faces awa... | 07/26/1983 |
| 4375872 | Draft control for stoves and furnaces A draft control unit for stoves and furnaces comprising housings of variable design, wherein may be incorporated a bi-metal element or means for remote control. An eccentric control rod supplies adjustment means for said bi-metal and a draft door with mea... | 03/08/1983 |
| 4319713 | Stove blower control accessory A temperature responsive blower control attachment for a wood-burning stove. The attachment is mountable to or seatable on a heated external surface of the stove and provides thermostatically regulated operation of an electrically operated blower or fan t... | 03/16/1982 |
| 4236668 | Thermal damper assembly having position controls A thermal damper assembly mounted to substantially close a flue at room temperature is equipped with thermally responsive coils to move the damper to an open position in response to heat generated by combustion. To allow commencement of combustion the dam... | 12/02/1980 |
| 4225080 | Damper construction for a gas fired combustion apparatus A thermally controlled damper construction for a gas fired combustion apparatus, such as a furnace. The damper has a generally eliptical shape and is mounted on a shaft in the stack or flue for pivotal movement from a closed position, where the damper is ... | 09/30/1980 |
| 4182487 | Apparatus having a temperature sensitive element for controlling a damper in a ventilation system This invention relates to a ventilation system for buildings and comprises for use at a venting duct outlet (opening into the outdoor atmosphere or into a room) a movable duct closing means and a temperature sensing means which is connected to operate sai... | 01/08/1980 |
| 4180051 | Furnace The furnace for burning wood or coal has a cabinet with a front wall and interconnected spaces between the inner and outer walls at the sides, top, bottom and rear. One of two outer walls have an inlet and outlet for flow of air to be heated. There are al... | 12/25/1979 |
