Quotables
"It is my heart-warmed and world-embracing Christmas hope and aspiration that all of us, the high, the low, the rich, the poor, the admired, the despised, the loved, the hated, the civilized, the savage (every man and brother of us all throughout the whole earth), may eventually be gathered together in a heaven of everlasting rest and peace and bliss, except the inventor of the telephone. "
Mark Twain ; Christmas greetings, 1890
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| Number | Title | Issue Date |
| 7898780 | Electronic differential switch An electronic differential switch is provided that is connected to a phase cable and a neutral cable of an electric network. The electronic differential switch includes a first winding associated with a second winding, at least one toroid associated with the first w... | 03/01/2011 |
| 7889466 | Fault circuit interrupter with bi-directional sensing A bi-directional fault circuit interrupter system having mis-wiring protection via numerous different poles. There are at least three different transformers wherein at least two of the transformers are differential transformers and at least one transformer is a neut... | 02/15/2011 |
| 7701680 | Ground-fault circuit interrupter An improved ground-fault circuit interrupter (GFCI) device has a moveable lock plate controlled by a relay to block a hole under the reset guiding member to prevent reset of the device. The moveable lock plate blocks the hole and prevents reset when the relay is not... | 04/20/2010 |
| 7692904 | Ground fault circuit interrupter A method of preventing an overload current from a power supply to a load through a ground fault circuit interrupter includes the steps of: obtaining an interrupted fault current from a hot wire to a ground wire via a first zero-phase current inductor and a fault cur... | 04/06/2010 |
| 7486492 | Electrical switching apparatus including a second trip circuit responding to failure of a first trip circuit to provide a repetitive signal A receptacle includes separable contacts, an operating mechanism structured to open and close the separable contacts, and two trip circuits. A first microprocessor-based trip circuit includes a first output having a first arc fault/ground fault trip signal, and a se... | 02/03/2009 |
| 7443309 | Self testing ground fault circuit interrupter (GFCI) A self testing fault detector having a line side and a load side and a conductive path there between, said apparatus is provided. The self testing fault detector includes a controller, adapted to perform periodic status tests on a protection circuit of the self test... | 10/28/2008 |
| 7440246 | Circuit interrupting apparatus with remote test and reset activation The present disclosure relates to resettable circuit interrupting devices and apparatus capable of being tested and reset from remote locations, and in particular to portable circuit interrupting devices and apparatus capable of being tested and reset from remote lo... | 10/21/2008 |
| 7423854 | Interruption circuit with improved shield An interrupter circuit is disclosed for interrupting power in a power cable from a power source. The power cable comprises an insulated line wire and an insulated neutral wire with a conductive shield surrounding the line wire and the neutral wire. A non-insulated d... | 09/09/2008 |
| 7400481 | Low cost arc fault detection technique Low cost apparatus and methods of detecting arc faults for better discriminating electrical events. The arc fault detection apparatus includes a current sensor, a di/dt input sense circuit, a dv/dt input sense circuit, and a processing unit. The current sensor monit... | 07/15/2008 |
| 7375939 | Relocatable power tap with ground-neutral fault detector A relocatable power tap having a plug configured to connect to a source of AC power and at least one receptacle. The relocatable power tap also includes a power supply connected to the plug and configured to convert an AC signal to a DC signal, and a detector connec... | 05/20/2008 |
| 7372686 | Power supply apparatus capable of detecting abnormality in current flowing in drive circuit A current detection unit samples motor current at every cycle corresponding to a cycle of the highest processing speed of a CPU. A current integral calculation unit integrates the value of the sampled motor current over a sampling period to calculate and output a cu... | 05/13/2008 |
| 7361845 | Wiring line for high frequency Wiring lines for use at a high frequency having reduced resistance and/or inductance are disclosed that may be readily manufactured in a semiconductor integrated circuit. Wiring lines can include extension lines (2), connected to both ends of an inductor (... | 04/22/2008 |
| 7354292 | Low profile latching connector and pull tab for unlatching same A small, low-profile plug connector for use with electronic devices provides a latching member with a pair of hooks that engage mating holes in a guide frame, and which can be easily delatched from the guide frame or opposing connector or housing. The hooks lock the... | 04/08/2008 |
| 7321282 | MEM's reed switch array A MEM's reed switch array is provided having a first switch having a sensitivity causing the first switch to open or close due to a magnetic flux, and a second switch of lesser sensitivity than the first switch causing the second switch to open or close due to a mag... | 01/22/2008 |
| 7312965 | Aircraft applicable current imbalance detection and circuit interrupter and packaging thereof The aircraft applicable current imbalance detection and circuit interrupter interrupts an electrical circuit when a current imbalance is sensed. The current imbalance detection and circuit interrupter includes a housing, power supplies, a sensor for sensing a curren... | 12/25/2007 |
| 7312394 | Protective device with tamper resistant shutters The present invention is directed to a protective shutter assembly for use within a cover assembly of an electrical wiring device. The assembly includes a frameless shutter sub-assembly movable between a closed position and an open position. The frameless shutter su... | 12/25/2007 |
| 7312964 | Ground-fault monitor for multiple circuits A ground fault monitor for an electrical system having a plurality of branch circuits each having a respective ground conductor extending to a service panel that includes a ground connection to which the ground conductors are electrically connected. The ground fault... | 12/25/2007 |
| 7310049 | Status indicator A status indicator indicates an operating state, including an electrical malfunction, of an electrical load that is located and controlled from locations remote from a monitoring location. ... | 12/18/2007 |
| 7301743 | Device and a method for advanced protection from short circuit current A two channel universal device for advanced protection from a short circuit current which evaluates a rate-of-change of current in a supply feeder and compares the current in the supply feeder and the current in load phases generating a differential signal in such a... | 11/27/2007 |
| 7298598 | Wiring device with multi-shot miswire The present invention is directed to a protective wiring device that includes a plurality of line terminals coupled to a plurality of load terminals by way of at least one conductive path. A miswire detection circuit is coupled to the at least one conductive path. T... | 11/20/2007 |
| 7289306 | Ground fault circuit interrupter containing a dual-function test button The present invention provides a circuit interrupting device, preferably a ground fault circuit interrupter (GFCI), which contains a dual-function test button having a short pole and a long pole positioned underneath the dual-function test button. When the GFCI is p... | 10/30/2007 |
| 7288933 | Position detecting system that self-monitors for connectivity faults A system for detecting position that is capable of self-monitoring for connectivity faults. In one embodiment, the system comprises a transformer, an excitation potential source, a bias potential source, and a processor. ... | 10/30/2007 |
| 7284078 | Deterministic field bus and process for managing same such that when transmissions from one subscriber station are enabled transmissions from other subscriber stations are disabled This invention relates to a deterministic field bus and a process for management of this bus enabling communication of messages between several subscriber stations each comprising at least one controller that generates and decodes the communication protocol, in whic... | 10/16/2007 |
| 7283340 | Electrical wiring device The present invention is directed to a protective device that includes a plurality of line terminals and a plurality of load terminals. A wiring state detection circuit is configured to detect a wiring state associated with the plurality of line terminals and the pl... | 10/16/2007 |
| 7268559 | Intelligent life testing methods and apparatus for leakage current protection An apparatus for testing the life of a leakage current protection device having a leakage current detection circuit. In one embodiment, the apparatus a trip mechanism state generator, a fault alarm generator, a ground fault simulation unit. In operation, the ground ... | 09/11/2007 |
| 7268294 | Adaptor; controller and plug receptacle for electronic device In a system which includes adaptors a controller and plug receptacles connected to electronic devices, an adaptor that can store identification information about electronic devices is connected to an electronic device, and the plug receptacle side to which the elect... | 09/11/2007 |
| 7265960 | Trip coil drive circuit and electrical switching apparatus including the same A drive circuit, such as an electronic trip device, is for a shunt trip coil of a network protector. The drive circuit includes an alternating current input adapted to receive an alternating current voltage and a first half-wave rectifier adapted to provide a plural... | 09/04/2007 |
| 7262945 | Electrical over/under voltage automatic disconnect apparatus and method An analog or digital circuit that senses both low and high input voltage and operates to disconnect both line and neutral electrical power connections to a protected device when abnormally low or high voltages are received from a single- or multi-phase power source,... | 08/28/2007 |
| 7253629 | Circuit protection device with grounded neutral half cycle self test The present invention is directed to a circuit and method for self-testing a protection device for use in an AC power distribution system. The device is configured to be coupled between an AC power distribution system and at least one load. The method includes the s... | 08/07/2007 |
| 7253637 | Arc fault circuit interrupter system In order to determine whether arcing is present in an electrical circuit, a sensor signal corresponding to current in said electrical circuit is processed. The sensor signal is filtered to determine the presence of noise in a predetermined frequency range and produc... | 08/07/2007 |
| 7239513 | Power control device The power control device has three units, each having two cooling fins set in opposed positions. Every cooling fin has an SCR mounted to adjust the voltage change. One of the two opposed cooling fins has a reed and a circuit board mounted thereon, and the power supp... | 07/03/2007 |
| 7233463 | Method and apparatus for detecting electrical faults and isolating power source from the electrical faults The present invention is a method and apparatus for protecting a power supply from electrical faults. The present invention operates substantially independently of the current drawn by the load. In addition, the present invention includes a time delay circuitry for ... | 06/19/2007 |
| 7233464 | Apparatus for and method of ground fault detection A ground fault detection system is provided where one current sensor is used to calibrate a second sensor in order to provide automatic zeroing of the difference measurement. The calibration is done gradually in order to differentiate between sensor drift and a tran... | 06/19/2007 |
| 7224559 | Differential current detection A detection circuit detects a difference between a source current and a return current. The detection circuit includes a constantly biased magnetic core through which conductors of the source and return currents extend, and a sense winding around the core. The sense... | 05/29/2007 |
| 7221548 | Residual-current circuit breaker and a method for testing the reliability performance of a residual-current circuit breaker A test circuit is provided, which is independent of a power supply and which enables a circuit breaker to be tested in a reliable manner. The test circuit includes a test coil which is devoid of electric potential and is wound around a totalizing current transformer... | 05/22/2007 |
| 7218356 | System and method for inductive line synchronization A synchronization signal generating apparatus and method in which an input circuit is inductively coupled to an alternating current signal line. The input circuit generates a rectified signal. A switch has a switch input and a switch output in which the switch input... | 05/15/2007 |
| 7218494 | Overload current protection device using magnetic impedance element An overload current protection device for cutting off power applied from a power supply to a load (3) such as a motor by means of a contactor (switch) (2) at overloading. With the configuration, an element (40) having a magnetic impedance effect... | 05/15/2007 |
| 7215521 | GFCI with reset lockout Resettable circuit interrupting devices, such as GFCI devices, that include reset lockout portion that does not test the circuit interrupter are provided. A resettable circuit interrupting device, such as a GFCI device that includes a reset lockout portion th... | 05/08/2007 |
| 7215519 | Ground and line fault interrupt controller/adapter An adapter module for detecting an electronic fault condition in an electronic circuit is disclosed wherein the adapter module may include electrical fault indicator circuitry. In general, the electrical fault indicator circuitry may include ground fault indicator c... | 05/08/2007 |
| 7209330 | Reset lockout for circuit interrupting device Resettable circuit interrupting devices, such as GFCI devices, that include a reset lock-out mechanism are provided. The reset lock-out mechanism prevents the resetting of electrical connections between input and output conductors if the circuit interrupting mechani... | 04/24/2007 |
