Did You Know...
...that the video game, Pong, was invented by a guy who graduated at the bottom of his engineering class? Nolan Bushnell spent more time running the games at a local amusement park than he did on his studies at the University of Utah. His dreams of working for Disney's amusement empire were dashed when the company wouldn't hire him. Taking a boring job, Nolan daydreamed about electronic versions of popular games. He invented Pong, the first video game, and went on to found Atari Co.
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| Number | Title | Issue Date |
| 8044542 | Motor rotor and compressor equipped with the motor rotor A motor rotor for a compressor includes a rotor core, at least one gas passage and an oil passage. The rotor core is configured to rotate about a rotation axis and has a plurality of stacked steel plates. The gas passage penetrates the rotor core in its axial direct... | 10/25/2011 |
| 7330006 | Power tool A power tool includes a brushless motor, a cooling fan, and a driving unit in a housing. The brushless motor is provided in the housing and having a rotary shaft. The cooling fan is attached to the rotary shaft in the housing, and rotatable together with the rotary ... | 02/12/2008 |
| 7276832 | Permanent magnet rotary motor There is provided a permanent magnet rotary motor in which manufacture of a stator core is facilitated. The permanent magnet rotary motor includes P rotor magnetic pole sections and N slots. In this permanent magnet rotary motor, a least common multiple LCM (P, N) i... | 10/02/2007 |
| 7271515 | Gas-cooled electrical machine with pressure charging A gas-cooled electric machine includes a generator housing, a rotor shaft, at least one axial fan disposed on the rotor shaft inside the generator housing and having a hub, and a pressure boosting apparatus associated with the axial fan and configured to raise an ab... | 09/18/2007 |
| 7142125 | Fan monitoring for failure prediction A method for monitoring a fan comprises measuring power usage of the fan, determining a derivative of the measured fan power usage, tracking the derivative over time, and predicting impending fan failure based on the tracked fan power usage derivative. ... | 11/28/2006 |
| 7015615 | Apparatus and method that prevent flux reversal in the stator back material of a two-phase SRM (TPSRM) A TPSRM may include a stator, having a plurality of poles and a ferromagnetic or iron back material, and a rotor having a plurality of poles and a ferromagnetic or iron back material. A current flowing through coils wound around a first set of the plurality of stato... | 03/21/2006 |
| 7001156 | Structure of an air inflation device An improved structure of an air inflation device is disclosed. External air is drawn to the motor and cylinder to provide rapid cooling so that the efficiency of the motor is maintained. In the present invention, a plurality of air filters is used to filter air. The... | 02/21/2006 |
| 6962523 | Power tool This invention relates to a power tool (1) including an operative element (4) for treating a work piece. The power tool (1) defines an air passageway and includes propelling means (20) operative to induce air to flow through the passagewa... | 11/08/2005 |
| 6959585 | Skids, modules, and modular system for monitoring hydrogen-cooled generators A modular system for monitoring a hydrogen-cooled generator includes a skid having a platform and an upwardly extending support. The support is attachable to a hydrogen gas purity monitoring module, a generator overheat monitoring module, a hydrogen gas dryer module... | 11/01/2005 |
| 6914354 | Assembly and method for direct cooling of motor end-winding Methods and related systems providing removal of heat from electric motors via fluid baths. ... | 07/05/2005 |
| 6903482 | Electrical current collector cleaning and cooling for high voltage rotating machines An electrical current collector system has an electrically conductive slip ring mounted to a rotatable shaft and a fixed conducting ring assembly forming a partially enclosed AC high voltage electrical current conductive ring channel in which slip ring contacting me... | 06/07/2005 |
| 6791232 | Generator gas shield and related method A generator gas shield includes an annular ring body having an outer radially extending flange terminating at a first free end of a first diameter; a curved inlet portion; a substantially axial portion surrounding a center opening, and a curved outlet portion termin... | 09/14/2004 |
| 6759770 | Cooling system for modular field windings of a generator Modular field windings including multiple coils are provided about a rotor core. Axially spaced spacers maintain the coils circumferentially spaced from one another, the spacers and coils defining radially directed openings in the rotor. Flow directing elements are ... | 07/06/2004 |
| 6674189 | Spindle apparatus A spindle apparatus of a machine tool comprises a main spindle rotatably supported in a housing via bearings. A helium circulation system is provided for introducing helium, lower in density and fluid pressure than air, through a helium supply port into a... | 01/06/2004 |
| 6664671 | Rotating electrical machine The invention relates to a rotating electrical machine with a contacting device whose circumference has at least one slide contact disposed on it, which remains in sliding contact with a brush apparatus (slide system), in which the at least one slide cont... | 12/16/2003 |
| 6617713 | Stagnant rotating prevention and safety control device for a main shaft A stagnant rotating prevention and safety control device for a main shaft is disclosed. The control device is provided with an oil fume detector, temperature control module and a vibration module of a rotating member, characterized in that the oil fume de... | 09/09/2003 |
| 6558116 | Gas-cooled machine, in particular a turbo-generator A turbo-generator comprising a shaft, on which is positioned an axial ventilator, a cover that divides an inflow chamber for a cooling gas transported by the axial ventilator from an outflow chamber for this cooling gas, and a cylindrical channel segment ... | 05/06/2003 |
| 6351045 | Croyogenic rotary transfer coupling for superconducting electromechanical machine A cryogenic rotary transfer coupling for a superconducting electromechanical rotating machine delivers supply flow from a cryogenic cooler to a rotor so as to cool the superconducting coils. The flow is then returned to the cooler and recirculated through... | 02/26/2002 |
| 6211586 | Gas-cooled electrical machine In a gas-cooled electrical machine, the conductor bars (3, 4) in the winding overhang are cooled directly by a flow element of the cooling gas flow which is passed through cooling channels (8) located within the eyes (5a, 5b) of the bar ends. To this end,... | 04/03/2001 |
| 5753986 | Explosion proof for electric motor A bearing 12 is provided on the end portion of a housing 30. This bearing 12 supports a shaft 14. A magnetic circuit 15, 16 for driving the shaft 14 is provided between the shaft 14 and the housing 30 with a gap 29 passing through in an axial direction. A... | 05/19/1998 |
| 5650674 | Enclosed electric motor with dynamic pressure air bearing An enclosed electric motor includes a stator assembly, a rotor assembly held via a dynamic pressure air bearing on the stator assembly, and a motor casing enclosing the stator and rotor assemblies. An air flow path is formed in the motor casing so as to c... | 07/22/1997 |
| 5557153 | Air-cooled rotating electrical machine In order to cool a rotating electrical machine having an open cooling circuit, mechanically filtered environmental air is normally passed through the cooling ducts in the stator and rotor and the machine air gap (22) by means of fans (15) which are arrang... | 09/17/1996 |
| 5493160 | Air filter for electric motors The invention relates to a filter assembly for capturing particles in electric motor exhaust streams. That assembly comprises a filter of extended surface area, including filter material and a frame substantially wrapped by the filter material, and a secu... | 02/20/1996 |
| 5430570 | Light deflector The present invention provides a light deflector which effectively cools a rotation torque generation portion, which leads to miniaturization of the apparatus and economy of electric power. The light deflector according to the present invention having a r... | 07/04/1995 |
| 5276373 | Gas-cooled electric machine In gas-cooled electric machines having a stator (3) and a rotor (6) on which an axial ventilator (9) is arranged, the cooling gas flows unevenly into the end-winding cavity (13) seen in the circumferential direction. By providing upstream of the axial ven... | 01/04/1994 |
| 5212432 | Industrial robot An industrial robot which can be used as a painting robot is mainly constructed by a robot body having a plurality of of motor spaces spaces for housing electric motors. A plurality of guiding passages for flowing in and a plurality of exhaust passages fo... | 05/18/1993 |
| 5185544 | Ventilation structure in a vertically mounted motor A ventilation structure in a vertically mounted motor is able to avoid clogging from accumulated brush abrasion dust. A ventilation path adapted to provide ventilation between the interior and the exterior of the motor casing is formed from a communicatio... | 02/09/1993 |
| 5099160 | Powered hand tool having an enclosed-ventilated drive motor The powered hand tool for machining includes an enclosed drive motor having a rotor shaft and is provided with at least one interior air duct through which drawn-in cooling air passes to cool the drive motor. To prevent the drive motor from being clogged ... | 03/24/1992 |
| 4647804 | High speed generator rotor oil path air vent A rotary electric machine including a stator, a rotor journalled for rotation relative to the stator about an axis of rotation and carrying electrical windings. The rotor includes a fluid inlet spaced from a fluid outlet and a cooling liquid flow path is ... | 03/03/1987 |
| 4625133 | Rotary electric machine with centrifugal filter A centrifugal filter for a high speed electrical machine of the type having a fluid flow path through its rotor. The centrifugal filter includes an enlargement at the beginning of the flow path through the rotor and which extends radially outwardly of the... | 11/25/1986 |
| 4531070 | Turbine generator hydrogen filtration system A gas filtration system is provided for coolant systems for dynamoelectric machines which utilizes differential pressures within the machine to induce a gas flow through the system. Valves are provided to balance dual inlet flows and the filtration system... | 07/23/1985 |
| 4513213 | Pressure density equalizing apparatus for two vessels A pressure density equalizing apparatus for two vessels each containing a gas coolant therein and provided with a gas drier therefor is provided wherein the gas drier to be supplied with the gas coolant under high pressure from one of the vessels is in co... | 04/23/1985 |
| 4496862 | High speed generator air vent for air gap A rotary electric machine including a stator, a rotor separated from the stator by an air gas journalled for rotation relative to the stator about an axis of rotation and electrical windings carried by at least one of the rotor and the stator. A cooling l... | 01/29/1985 |
| 4399378 | Filter for cooling air stream of electric commutator motor for household device A filter for a cooling air stream of an electric commutator motor for a household device has a passage into which a cooling air stream flows after passing an electric commutator motor, and a filtering member composed of an electrostatically charged materi... | 08/16/1983 |
| 4358303 | Rotating debris screen for alternator An alternator filter arrangement which encorporates an alternator having a driven shaft passing through its housing which has an air intake therein and a non-magnetic filter screen mounted for rotation with the driven shaft with the filter screen being in... | 11/09/1982 |
| 4314831 | Air filter assembly in combination with motor vehicle generator An air filter assembly for a heavy duty motor vehicle generator is disclosed. The assembly includes an adaptor plate and connecting means for rigidly connecting the adaptor plate to one end of the generator. The assembly further includes a housing enclosi... | 02/09/1982 |
| 4273674 | Thermal detecting paint compositions Sets of certain halogenated aromatic organic compounds, for example, N-alkyl tetrahalophthalimides, have been found useful as chemical tags when employed in a thermal particulating organic resin. Improved tagging performance has been achieved over extende... | 06/16/1981 |
| 4272988 | Multiple signal thermoparticulating coating A composition is disclosed of a solution of a resinous carrier and at least two compounds which thermoparticulate at different temperatures between 60° and 200° C. A coating is made by applying the composition to a portion of an electrical apparatus exp... | 06/16/1981 |
| 4229974 | Petroleum and synthetic grease thermoparticulating coating A petroleum or synthetic grease is used to protect electrical apparatus from overheating. The grease is applied to a portion of an electrical apparatus which is exposed to a gas stream, particularly to portions subjected to operating temperatures of about... | 10/28/1980 |
| 4179926 | Multiple signal thermoparticulating coating A composition is disclosed of a solution of a resinous carrier and at least two compounds which thermoparticulate at different temperatures between 60° and 200° C. A coating is made by applying the composition to a portion of an electrical apparatus exp... | 12/25/1979 |
