Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 6876100 | Small power generating device and water faucet device A small generator includes a hydraulic turbine provided in a fluid path rotating with a passage of a fluid in a predetermined flow and a rotator coupled to the hydraulic turbine rotating together with the hydraulic turbine which acts as a rotor portion opposed to a ... | 04/05/2005 |
| 6870279 | Method and system for control of turbogenerator power and temperature A power controller controls the turbine of a turbine powered generating system regardless of the load on said system to maximize the efficiency of the turbine and maintains the turbine at a substantially constant temperature during a system load change by using an e... | 03/22/2005 |
| 6864593 | Device for producing of electric energy and of signal transmitting pressure pulses The invention is directed to a device for the generation of pressure pulses, being intended for transmitting signals, in a fluid-carrying channel (2), using a pulser (1) designed to be integrated in the channel (2) and having a housing (4... | 03/08/2005 |
| 6864595 | Detection of islanded behavior and anti-islanding protection of a generator in grid-connected mode A method of controlling a generator system connected to an electric power system in which the output frequency characteristic of the generator system is measured, a first phase angle and frequency of the measured frequency characteristic is estimated using a first p... | 03/08/2005 |
| 6853096 | Wind turbine A rotation shaft is installed in the center of a wind turbine. Blades are secured to the rotation shaft to be circumferentially spaced apart one from another. Each blade has a lattice composed of transverse lattice elements and longitudinal lattice elements which ar... | 02/08/2005 |
| 6847129 | Turbine generator starting method and turbine generation system An object of the present invention is to provide a turbine generation system in which a starting inverter circuit for starting a turbine generator is additionally employed so that the system comprises a high-power generation inverter and the starting inverter with l... | 01/25/2005 |
| 6844706 | Multiple path variable speed constant frequency device having automatic power path selection capability The present invention relates to variable speed constant frequency (VSCF) devices and methods for maximizing engine generator efficiency. In one embodiment, a VSCF device may include at least two paths for conducting power to the load. One path, a line inductor path... | 01/18/2005 |
| 6841891 | Electrogasdy anamic method for generation electrical energy A process is provided for producing electrical energy from thermal energy in which charges are separated between two working media triboelectrically or electrostatically, the charges are moved away from one another by displacement of the working media under the acti... | 01/11/2005 |
| 6838781 | Control system for a cogeneration unit A control system for a cogeneration unit, the cogeneration unit including a heat engine and an alternator, driven by the heat engine, which generates AC electricity for an electrical load. The control system includes a parameter sensing means for sensing one or more... | 01/04/2005 |
| 6832486 | Electrical machine An electrical machine, such as a generator or motor, is incorporated in a gas turbine engine. The engine has compressor blades which are shrouded at. Beyond the shroud, an electrical machine is provided by rotor projections which run in a channel in flux cores, with... | 12/21/2004 |
| 6831373 | Hydropower generation apparatus and method Apparatus and methods for generating power utilizing the flow of water from an upper water body to a lower water body in order to generate an upward buoyant force on at least one buoyant object located in a chamber. In preferred embodiments, water is recycled betwee... | 12/14/2004 |
| 6831374 | Fluid power generator A fluid power generator system includes an operating mode in which a continuously variable output corresponding to a wide range of a flow rate is given by selectively combining generators with optimum rated outputs from said plurality of generators according to natu... | 12/14/2004 |
| 6815932 | Detection of islanded behavior and anti-islanding protection of a generator in grid-connected mode A method of controlling a generator system connected to an electric power system in which the output frequency characteristic of the generator system is measured, a first phase angle and frequency of the measured frequency characteristic is estimated using a first p... | 11/09/2004 |
| 6812586 | Distributed power system A power generation system is disclosed. In one embodiment, the power generation system includes a fuel source, a turbogenerator coupled to the fuel source, and a power controller coupled to the turbogenerator. The power controller includes an AC/DC power converter t... | 11/02/2004 |
| 6812587 | Continuous power supply with back-up generation A continuous power supply may include a turbogenerator to provide power to supply the load and or an energy storage element and possibly also to the primary energy source. Utilizing an isolated DC bus architecture permits bi-directional power flow among interconnect... | 11/02/2004 |
| 6798080 | Hydro-power generation for a water treatment system and method of supplying electricity using a flow of liquid A hydro-power generation system for use in conjunction with a water treatment system is disclosed. The embodiments of the hydro-power generation system include an impeller rotatably positioned in a housing. The impeller is rotatably coupled with a generator. When wa... | 09/28/2004 |
| 6794766 | Method and operational strategy for controlling variable stator vanes of a gas turbine power generator compressor component during under-frequency events A method is provided for controlling variable inlet and stator vanes of a heavy-duty gas turbine electrical power generator compressor component upon occurrence of power grid under-frequency events. Variable inlet guide vanes and the front four variable stator vanes... | 09/21/2004 |
| 6791204 | Torque generation for salient-pole synchronous machine for start-up of a prime mover A system and method to provide an improved power electronics starting system (100) in which starting torque is delivered by a salient pole synchronous machine (102), while associated power electronics (110) and (118) utilization is maximi... | 09/14/2004 |
| 6787933 | Power generation system having transient ride-through/load-leveling capabilities A power generation system includes a turbogenerator having a motor/generator and a turbine coupled to a common shaft, and generates AC power. A first power converter is coupled to the turbogenerator and a DC bus and converts the AC power to DC power on the DC bus. A... | 09/07/2004 |
| 6784565 | Turbogenerator with electrical brake In an integrated turbogenerator system having an air intake for a compressor to supply combustion air to a combustor, an electric brake device such as a resistor is connected to the electrical power output of the turbogenerator and is situated in the air intake to b... | 08/31/2004 |
| 6777823 | Integrated continuous power system assemblies having multiple nozzle block segments A continuous power system assembly is provided that includes an integrated shaft-driven unit. The unit contains a turbine, an alternator, a flywheel and a feed pump, all of which are coupled to the shaft. During various modes of operation, any of the turbine, altern... | 08/17/2004 |
| 6762512 | Methods for starting a combustion turbine and combustion turbine generator configured to implement same methods A method for starting a combustion turbine generator 10 includes configuring the generator so that the generator's rotor 16 is connected to receive all DC electrical power from the armature 30 of a DC-field brushless exciter 20 after rect... | 07/13/2004 |
| 6750633 | Electrical circuit for generating a three-phase alternating current An electrical circuit for producing a three-phase AC current from a low-power generator (10 kW to 5 MW) and for feeding the current into a power grid has a forward mode where energy flows from the generator to the power grid or to an energy-storage device and a reve... | 06/15/2004 |
| 6750557 | Redundant prime mover system The present invention provides a redundant prime mover system to drive a machine having an engine coupled to the machine, and a motor/generator coupled to the machine and an electrical network connection. The engine and the motor/generator have three or four operati... | 06/15/2004 |
| 6729140 | Electrical machine An electrical machine, such as a generator or motor, is incorporated in a gas turbine engine. The engine has compressor blades which are shrouded at. Beyond the shroud, an electrical machine is provided by rotor projections which run in a channel in flux cores, with... | 05/04/2004 |
| 6724098 | Generator system with gas turbine In a generator system having a gas turbine (1) and a generator (2), which is driven by the gas turbine (1), an electricity supply network (5) is supplied from an energy reservoir (6) when the output of the gas turbine (1) is... | 04/20/2004 |
| 6724099 | Method and apparatus for starting up a turboset In order to achieve efficient utilization of components required for the generator operation, during the run-up of a turboset having a gas turbine, a generator and also a rectifier exciter, the latter is operated as an asynchronous generator, via which the rotor win... | 04/20/2004 |
| 6713892 | Automatic turbogenerator restarting system A method and system to automatically restart a permanent magnet turbogenerator/motor when a fatal fault is detected. The automatic restart logic includes time constraints and limitations on the number of iterations, and is useful regardless of whether the permanent ... | 03/30/2004 |
| 6703719 | Systems and methods for managing a battery source associated with a microturbine power generating system A microturbine power generating system and associated method for managing a battery source associated with a microturbine power generating system is disclosed. The system and methods enable charging the battery source from the utility grid when the turbin... | 03/09/2004 |
| 6664653 | Command and control system for controlling operational sequencing of multiple turbogenerators using a selected control mode A command and control system and method for multiple turbogenerators in a grid parallel system includes a master controller to start, sequence, coordinate power commands, and provide fault handling to each of the individual turbogenerators and the specifi... | 12/16/2003 |
| 6664654 | System and method for dual mode control of a turbogenerator/motor A method of controlling a permanent magnet turbogenerator/motor includes providing a protected load connected in parallel with the turbogenerator/motor through a pulse width modulated inverter configured in a first operating mode to supply controlled curr... | 12/16/2003 |
| 6661112 | Fluid control system with automatic recovery feature A fluid control method includes providing fluid flow through a conduit having a pressure sensitive shutdown valve; driving an electrical power generator with the turbine wheel and delivering electrical power to a storage battery which in-turn powers the c... | 12/09/2003 |
| 6639328 | Microturbine/capacitor power distribution system A power generation system is disclosed. In one embodiment, the power generation system includes a fuel source to provide fuel, a turbogenerator, coupled to the fuel source, to generate AC power, and a power controller electrically coupled to the turbogene... | 10/28/2003 |
| 6628005 | Single speed turbine generator for different power system output frequencies in power generation systems and associated methods A power generation system (10) and associated methods to compensate for different power system output frequencies are provided. The system (10) preferably includes a turbine (12) having a turbine rotor (13) positioned to rotate at a preselected rotational... | 09/30/2003 |
| 6628006 | System and method for recovering potential energy of a hydrogen gas fuel supply for use in a vehicle A system 10 is provided for recovering the potential energy of a hydrogen gas fuel supply within a fuel cell powered vehicle 14. The system 10 includes a conventional storage tank 16 which receives and stores hydrogen gas at a relatively high pressure, an... | 09/30/2003 |
| 6605928 | Electrical system for turbine/alternator on common shaft An electrical system for a turbine/alternator comprising a gas driven turbine and permanent magnet alternator rotating on a common shaft comprises an inverter circuit connectable either to an AC output circuit or the stator winding of the alternator. A co... | 08/12/2003 |
| 6559551 | Starter device for fuel cell system A starter device, preferably for cold-starting, for fuel cell systems, including a current generation system, for generating electrical energy, and a gas generation system, for generating H2 -rich gas for the current generation system. An inter... | 05/06/2003 |
| 6552440 | Automatic turbogenerator restarting method and system A method and system to automatically restart a permanent magnet turbogenerator/motor when a fatal fault is detected. The automatic restart logic includes time constraints and limitations on the number of iterations, and is useful regardless of whether the... | 04/22/2003 |
| 6545373 | System and method for providing ballast loading for a turbo-generator A ballast load control system and method is presented that regulates the output electrical power supplied by a turbo-generator such that appropriate turbine loading may be achieved. Such enables the use of a turbo-generator having an expansion turbine to ... | 04/08/2003 |
| 6512305 | Method and apparatus having a turbine working in different modes for providing an uninterruptible supply of electric power to a critical load An uninterruptible power supply (UPS) system supplies power to computers, medical apparatus or other critical loads when primary power supply falters. The UPS system includes an electrical machine connected to a turbine that can be rotated by a motive flu... | 01/28/2003 |
