Celebrity Inventors
Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.
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| Number | Title | Issue Date |
| 8174150 | System and method for control of a grid connected power generating system A power generating system includes an energy source coupled to a DC link through a first power converter and a second power converter to couple the DC link to a power grid. A first controller in the power generating system regulates voltage on the DC link and a seco... | 05/08/2012 |
| 7932637 | Control of small distributed energy resources A method includes operating a microsource in a grid mode in which the microsource is connected to a utility grid. The microsource is located in a microgrid and is configured to deliver a power P1 at a frequency ω1. During operation in the grid... | 04/26/2011 |
| 7906870 | System and method for anti-islanding, such as anti-islanding for a grid-connected photovoltaic inverter A system and method for detecting islanding in a Distributed Generation utility grid is described. In some examples, the system, via an inverter, injects a frequency disturbance to a location of the utility grid associated with a DG generator, measures both the freq... | 03/15/2011 |
| 7687937 | Control of small distributed energy resources A method of controlling the output inverter of a microsource in a distributed energy resource system is disclosed. Embodiments of the invention include using unit or zone power controllers that reduce the operating frequency of the inverter to increase its unit outp... | 03/30/2010 |
| 7622824 | Distributed power supply arrangement A plurality of power sources (26) supply power to a plurality of loads (24) via a distribution network (20, 22). Voltage is sensed at one or more points (28) in the network to provide a closed loop for regulating current or power supplied... | 11/24/2009 |
| 7439635 | Output suppressing method of a plurality of dispersed power sources and dispersed power source managing system Regarding output suppression control of a plurality of dispersed power sources linked to a high-voltage-to-low-voltage transformer of a commercial power system, the partiality of the output suppression of a plurality of dispersed power sources is eliminated and, cos... | 10/21/2008 |
| 7394170 | Reconfigurable backplane power distribution A backplane system for reconfigurable backplane power distribution includes circuit board slots, power entry modules, power distribution circuitry, and switching circuitry. The power distribution circuitry includes a first power configuration and a second power conf... | 07/01/2008 |
| 7388303 | Stand-alone electrical system for large motor loads An electrical power system that can be used to interconnect a plurality of generators to a plurality to loads while being rated at less than a total power consumed. The system is preferably used to distribute power for a Liquefied Natural Gas (LNG) facility. The sys... | 06/17/2008 |
| 7312539 | Output suppressing method of a plurality of dispersed power sources and dispersed power source managing system Regarding output suppression control of a plurality of dispersed power sources linked to a high-voltage-to-low-voltage transformer of a commercial power system, the partiality of the output suppression of a plurality of dispersed power sources is eliminated and, cos... | 12/25/2007 |
| 7127688 | Method and apparatus for determining interactive electromagnetic effects among conductors of a multi-layer circuit To estimate a distribution of voltages or currents in the layers of a multi-layer circuit, an exemplary current flow in each layer is discretized into a number of current vector elements and at least one scalar charge element related to the charge associated with ea... | 10/24/2006 |
| 7116014 | Method and apparatus for stabilizing “DC-DC Transformers” in a distributed power system using remote sense The output voltage of a dc—dc transformer having a ratio of approximately m/n, and which is powered from a main power supply having a remote sense input, can be stabilized by feeding the output of the dc—dc transformer to the remote sense input of the main power... | 10/03/2006 |
| 7116557 | Imbedded component integrated circuit assembly and method of making same Integrated circuit components are imbedded within a laminate substrate disposed on a thermally conductive core, which provides a thermal sink. The circuit components are electrically connected to the integrated circuit via flexible electrical interconnects such as f... | 10/03/2006 |
| 7067940 | Submarine branching unit having asymmetrical architecture A branching unit for use in submarine systems that includes a ground termination; first, second, and third cable terminations each coupled to a power feed line of a respective submarine cable; a re-configuration relay in series between the first cable termination an... | 06/27/2006 |
| 6987331 | Voltage recovery device for use with a utility power network A voltage recovery device is configured to provide reactive power to a utility power network at a level and for a duration sufficient to recover the voltage on the utility power network within a predetermined proportion of the nominal voltage, following a fault cond... | 01/17/2006 |
| 6812590 | Power supply circuit External output terminal 28 is clamped by clamping circuit 20, and a current mirror is configured using diode circuit 23 within clamping circuit 20 and detector transistor 34. When the voltage of external output terminal 28 ... | 11/02/2004 |
| 6417580 | Power supply booster A power supply booster module for a programmable logic controller system replaces the primary power supply for a number of modules within the system. The power supply booster module allows high power consuming or highly complex modules to be used within a... | 07/09/2002 |
| 6191502 | Apparatus for tapping current from a busbar In an apparatus for tapping current from a busbar by means of a roller which is arranged, for example, on a trolley, the one roller is also intended to have associated with it at least one further roller, adjacent to it and at a distance from the same bus... | 02/20/2001 |
| 6040639 | Circuit for improved load transient response in power supplies An apparatus contains a main electrical supply and an additional electrical supply for supplying additional electrical current in response to a change in an output load supplied by the main electrical supply. A differential measuring device senses a chang... | 03/21/2000 |
| 5712514 | System and method for supplying power to stator sections of a long-stator magnetic levitation railway system A system and method for supplying power to stator sections of a long-stator magnetic levitation railway system, where the stator winding is subdivided into several stator sections that can be controlled individually along a route for a magnetically levita... | 01/27/1998 |
| 5598041 | Efficient fault tolerant switching circuit for redundant d. c. power supplies Two power sources are connected to a load by a pair of MOSFET control switches, each connected respectively in series between one of the sources and the load, with their integral diodes forwardly biased between the power source and load. An isolating MOSF... | 01/28/1997 |
| 5455465 | Rapid transit car electrical coupling apparatus and method A train car with mirror image electrical couplings having mirror image halves at each end for connecting train lines in each car to corresponding train lines in adjacent cars, regardless of the end-to-end orientation of the car, has selected pairs of trai... | 10/03/1995 |
| 5382834 | Electrical transit power supply system The power supply system for a DC powered electrical transit system is adapted to accommodate normal, surge and continuous peak demands by locating battery equipped secondary power supplies at locations which create excess power demands such as at passenge... | 01/17/1995 |
| 4684854 | Method and apparatus for adding additional D.C. motors and control thereof A control system for a material handling device such as a drag line in which additional power required for a first motion, such as hoisting, may be obtained from the power source for a second motion such as drag and conversely additional power for the sec... | 08/04/1987 |
| 4641372 | Power feeding submarine telecommunications systems An optical undersea telecommunications system has a main cable (1) which branches (BU1) near a landfall to two separate stations. Each branch (71,81) supplies half the current of the main cable (1) for powering the regenerators. In the event of a fault in... | 02/03/1987 |
| 4468572 | Feeder voltage compensating apparatus for electric railway This invention serves to reduce the drop of feeder voltage in an electric railway, and relates to a feeder voltage compensating apparatus for electric railways wherein an accumulator and a thyristor rectifier are connected by a thyristor switch circuit wh... | 08/28/1984 |
| 4074146 | Load sharing modular power supply system A power supply employing a clock-driven D.C.-A.C.-D.C. converter having a current transformer in the A.C. section to develop a trapezoidal current feedback pulse train which is then converted to a trapezoidal voltage pulse train. A comparator compares the... | 02/14/1978 |
