Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 8227938 | Batteryless starter for UPS with sensor, motor generator, rectifier, and transformer Uninterruptible Power Supply system comprising motor generator means for conditioning electric power; backup generator means including an internal combustion engine having electrically driven starter, providing backup electric power; electrical switch means, said sw... | 07/24/2012 |
| 7880335 | Power backup system for offshore wind generators The inventions concerns a cable comprising a cable jacket and at least two medium voltage wires disposed within the cable jacket for transporting medium voltage current and at least two low voltage wires disposed within the cable jacket for transporting a low voltag... | 02/01/2011 |
| 7633181 | DC-based data center power architecture A DC-based power system including: an AC power distribution system for providing AC power to a first node and a second node; a first converting system coupled to the first node that converts AC power to DC power and outputs the DC power to a first distributed bus ba... | 12/15/2009 |
| 7615892 | Modular and scalable power conversion system for aircraft A method and apparatuses are used for power conversion. The apparatus according to one embodiment comprises a plurality of power conversion modules (130—1, . . . , 130—n), the plurality of power conversion modules (1... | 11/10/2009 |
| 7468566 | Automatic transfer switch apparatus An Automatic Transfer Switch (ATS) having a switch configured to connect one of two sources to a load, a mechanical drive, an actuator, and a solid state control relay is disclosed. The mechanical drive is configured to drive the switch between a first position and ... | 12/23/2008 |
| 7417337 | Method and system for facilitating no-break power transfer An improved method and system for facilitating no-break power transfer between an APU and a main engine includes determining a required APU speed for conducting power transfer based on various APU operating parameters, such as engine speed, fuel, environmental tempe... | 08/26/2008 |
| 7358620 | Methods and apparatus for ride-through operation of a complementary device to a transient power source In accordance with certain exemplary embodiments, the present technique provides methods and apparatus for providing operating power to a complementary device to an induction device based uninterruptible power source (UPS) via a direct current (dc) bus. In one embod... | 04/15/2008 |
| 7352082 | Transfer switch device and method This disclosure is concerned with devices and methods for voltage source transfer switching that reduces or eliminates transformer saturation due to DC flux built up during a transfer event. First and second voltage sources (primary and alternate) are connectable to... | 04/01/2008 |
| 7268441 | Control device for motor generator In the control device for motor generator in which an engine is started and power generation is performed while a vehicle is running, a field current limit value Ifm in electric driving to start the engine is larger than a field current limit value Ifg in power gene... | 09/11/2007 |
| 7230344 | Apparatus and method for transient and uninterruptible power In accordance with certain exemplary embodiments, the present technique provides methods and apparatus for providing transient and uninterrupted power to protected loads. As one example, the present invention provides an induction device that operates as an inductio... | 06/12/2007 |
| 7215098 | Electrical generating system having capacitative control of alternator regulation The invention provides an electrical generating system comprising an AC electrical generator (G) having an output, and a capacitor arrangement (Ca) provided at the output of the generator and arranged so as to offset a drop of voltage from no-load to full-load occur... | 05/08/2007 |
| 7183668 | Generator with current and voltage abnormality detection A detecting means easily detects the abnormality of a generator having a plurality of power supply units. Each of the power supply units includes one of a plurality of output windings L1 to L4, which are wound independently of each other around single ... | 02/27/2007 |
| 7170262 | Variable frequency power system and method of use A variable frequency power system with a power source having a rotating output and a speed control to regulate rotational speed of the rotating output. A generator coupled to and driven by the rotating output of the power source, whereby the speed control of the pow... | 01/30/2007 |
| 7155320 | Distributed power delivery system A method for supplying power includes supplying power to at least one critical device, supplying power to at least one essential device, and remotely removing power to the essential device while maintaining power to the critical device. ... | 12/26/2006 |
| 7150159 | Hybrid auxiliary power unit for truck A hybrid auxiliary power system for a vehicle provides auxiliary electrical power, cooling, and heating while the main engine of the vehicle is turned off. An auxiliary engine directly drives an air-conditioner compressor. A condenser condenses the refrigerant and s... | 12/19/2006 |
| 7122916 | Multi-unit power generation system for stand-alone and grid connected operation A multi-unit power generation system comprising a plurality of generators connected in parallel, a switching system for switching between and/or aggregating a generator load produced by the plurality of generators and a utility grid load, and a control system. The c... | 10/17/2006 |
| 7116066 | Power supply circuit of a high speed electric motor A power control system (12) for an electric motor having at least one magnetic bearing includes a DC/DC converter (18) supplied from a DC link bus (179) connected to a main power supply (14), the bus (17) supplying power for the el... | 10/03/2006 |
| 7102772 | Method and system for delivery of a facsimile A method of delivering a facsimile, including: providing a printed form for entering a message thereon using a sensing device adapted to read coded data on the form; receiving, in a computer system, interaction data representing interaction of the sensing device wit... | 09/05/2006 |
| 7092262 | System and method for pre-charging the DC bus of a utility connected power converter A system and method for pre-charging the DC bus of a utility connected power converter. In one embodiment, a full-wave rectifier circuit is coupled to the utility grid through an isolation transformer and circuit protector. The rectifier circuit output is connected ... | 08/15/2006 |
| 7081734 | Ride-through method and system for HVACandR chillers A method of providing ride-through capability in a chiller/refrigeration system employs a variable speed drive with an active converter stage, a DC link stage and an inverter stage for providing variable frequency and voltage to power at least one motor. An inductio... | 07/25/2006 |
| 7075194 | Electronically reconfigurable battery An electronically reconfigurable battery includes a number of battery modules selectively interconnected by a number of electronic switches, wherein a selectable number of battery modules may be connected either in a series configuration or in a parallel configurati... | 07/11/2006 |
| 7071581 | Uninterruptible power supply system using a slip-ring, wound-rotor-type induction machine and a method for flywheel energy storage Several embodiments of an uninterruptible power supply (UPS) system, which system provides highly reliable output power to a load using a slip-ring induction machine and a flywheel combination, are disclosed as well as methods relating thereto. In a preferred embodi... | 07/04/2006 |
| 7068014 | Online alternator flywheel system A flywheel energy storage system for preventing power interruptions to a load from interruptions of primary power includes a flywheel supported for rotation about an axis on a bearing system, and a motor-generator having a rotor coupled with the flywheel, and having... | 06/27/2006 |
| 7042108 | Backup power system A backup power system is connected in parallel to a load which is powered via a power line connecting that load to a main power source, such as a utility. The backup system includes a generator/condenser unit that is coupled to a flywheel unit to maintain the flywhe... | 05/09/2006 |
| 7015598 | Power control apparatus for a bicycle A power control apparatus for a bicycle that uses a first power supply and a second power supply to provide electrical power includes a voltage sensor for sensing a voltage from the first power supply. A control unit is coupled to the voltage sensor and is coupled f... | 03/21/2006 |
| 7013646 | Auxiliary power system for a motor vehicle An auxiliary power system for a motor vehicle primary engine used to drive primary engine accessories when the primary engine is not operating. The system comprises a secondary engine that drives a hydraulic pump. The hydraulic pump is connected to a hydraulic motor... | 03/21/2006 |
| 6992265 | Integrated engine welder and electric compressor An integrated welder, generator and compressor unit that includes a housing that at least partially contains components of a welder, generator and an electric compressor. An engine, an electric current generator, and an electric air compressor are at least partially... | 01/31/2006 |
| 6909573 | Disk drive including means for preventing rotation A motor controller includes DC motor, driving mechanism, voltage generator circuit and control unit. The driving mechanism moves an object having a predetermined mass against a load applied to the object and by transmitting a rotational force of the motor to the obj... | 06/21/2005 |
| 6897577 | Methods and system for power generation A method of operating a power generation system and a power generation system are provided. The method includes coupling at least one electrical generator to at least one prime mover, wherein the at least one generator includes at least one of a stator and a rotor w... | 05/24/2005 |
| 6819012 | Flywheel energy storage system A flywheel uninterruptible power supply has an energy storage flywheel supported in a low pressure containment vessel for rotation on a bearing system. A brushless motor/generator is coupled to the flywheel for accelerating and decelerating the flywheel for storing ... | 11/16/2004 |
| 6747372 | Distributed control method for multiple connected generators An energy generation network according to the present disclosure includes energy generating elements organized in a tree structure of superior and inferior system levels, with control systems and a communication network. In a currently preferred embodiment, energy g... | 06/08/2004 |
| 6720674 | Device for prevention of power interruptions A device for preventing power interruptions to a DC bus includes a flywheel supported on bearings for rotation inside a chamber having a drag reducing atmosphere within a container. During charging, the flywheel is driven by an integral brushless permanent magnet ex... | 04/13/2004 |
| 6657321 | Direct current uninterruptible power supply method and system A method and system are described for providing a direct current (DC) uninterruptible power supply with the method including, for example: continuously supplying fuel to a turbine; converting mechanical power from the turbine into alternating current (AC)... | 12/02/2003 |
| 6628012 | Uninterruptible power supply An uninterruptible power supply system (UPS) includes a coupling choke (5) being operably arranged between an electrical load (2) and an external source of power (4). A generator (8) is operably connected to the coupling choke (5) on the side of the elect... | 09/30/2003 |
| 6614132 | Multiple flywheel energy storage system An electrical energy storage system for supplying power to a load comprises a plurality of flywheel energy storage systems, each supplying a power output signal, and a connector circuit. The connector circuit connects the flywheel energy storage systems t... | 09/02/2003 |
| 6611068 | Power system An exemplary embodiment of the invention is a power system for providing power to a critical load. The system includes a first power source producing sufficient power to supply the critical load and a second power source, independent of said first power s... | 08/26/2003 |
| 6552447 | Power supplying apparatus, image forming apparatus and method of controlling the same A power supply circuit providing voltage for operation, a motor operating powered by the output from this power supply circuit and continuing rotation powered by inertia even after loss of the output and a non-volatile memory are equipped. If the output v... | 04/22/2003 |
| 6486627 | Flywheel uninterruptible power source A flywheel uninterruptible power source has a charging system that uses a high frequency pulse width modulated inverter inside the motor drive with a very low frequency, line commutated converter that regulates by switching the alternating current from th... | 11/26/2002 |
| 6320279 | Uninterrupted electric power supply system The uninterrupted electric power supply system of the present system includes: a control means(5); a synchronous machine (1) having an electric motor means (1M) and an alternator means (1A), the electric motor means being arranged to be fed by the network... | 11/20/2001 |
| 6288456 | Power system An exemplary embodiment of the invention is a power system for providing power to a critical load. The system includes a first power source producing sufficient power to supply the critical load and a second power source, independent of said first power s... | 09/11/2001 |
