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| Number | Title | Issue Date |
| 7773353 | Power supply device, electrically-driven vehicle incorporating power supply device, and method of controlling power supply device An ECU determines based on a voltage from an insulation resistance decrease detector whether the insulation resistance of a power supply device decreases or not. When a load external to the vehicle is not connected to the power supply device, the ECU sets a determin... | 08/10/2010 |
| 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 |
| 7432618 | Inverter anti-islanding method A method for detecting and interrupting an electrically islanded condition for a grid connected current source inverter is disclosed in which: A line voltage frequency is monitored at a cycle or sub cycle resolution. Current output from the inverter is periodically ... | 10/07/2008 |
| 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 |
| 7403086 | Ground fault circuit interrupter with reverse wiring protection A new type of switching mechanism for a ground fault circuit interrupter (GFCI) with reverse wiring protection preferably includes two pairs of fixed contact holders, each member of each pair having at least one fixed contact at one end; a pair of movable contact ho... | 07/22/2008 |
| 7364393 | Machine adaptation The invention relates to the transmission of power and/or data from/to a stationary part of a machine tool 200 to/from an accessory 100 mounted in the spindle 210 of the machine tool 200. A first electrical link or interface 1a,... | 04/29/2008 |
| 7362103 | System for driving a plurality of lamps and fault detecting circuit thereof A system for driving a plurality of lamps includes an inverter circuit (20) and a fault detecting circuit (30). The inverter circuit includes a plurality of outputs divided into a first output part and a second output part. The fault detecting circuit ... | 04/22/2008 |
| 7319282 | Switch circuit A switch circuit for controlling the supply of electrical power from an electrical power source to a load includes a power supply switch comprising input, output and control terminals. The circuit further includes an electronic switching device connected to the cont... | 01/15/2008 |
| 7248057 | Method, apparatus and computer-readable code for detecting on the fly an incipient ground fault in an electrical propulsion system of a locomotive Method, apparatus and computer-readable code are provided for detecting a location of an incipient ground fault in an electrical propulsion system of a relatively large land-based vehicle, such as a locomotive. The detection is performed essentially in real time and... | 07/24/2007 |
| 7236849 | Safety system for power equipment Apparatus and method is disclosed for providing a safety system for power equipment comprising a machine having a lower tool, an upper tool, and a safety controller. The lower tool is electrically isolated from the reversible upper tool. A safety controller is coupl... | 06/26/2007 |
| 7209819 | Drive circuit for a firing cap of a vehicle restraint system A drive circuit for a firing cap, triggerable by an electric direct current firing pulse, of a vehicle restraint system, has a firing circuit which forms a series connection of a high side switch to the firing cap and to a low side switch. The firing circuit is conn... | 04/24/2007 |
| 7170375 | Permanent-magnet ground fault circuit interrupter plug and its permanent-magnet mechanism therein A permanent-magnet ground fault circuit interrupter plug with self-diagnosing function having an enclosure and a permanent-magnet mechanism encased in the enclosure. In one embodiment, the permanent-magnet mechanism includes a frame assembly having a crossbeam, a fr... | 01/30/2007 |
| 7079406 | Power converting apparatus, control method therefor, and solar power generation apparatus The object is to reliably detect a ground fault of a solar battery. To detect a ground fault position to take an efficient measure against the ground fault, DC power input from a solar battery is converted into AC power and supplied to a system. In a system intercon... | 07/18/2006 |
| 7035067 | Apparatus for detecting coil failure in an actuating solenoid of an electrical power switch The continuity of the coil of the actuating solenoid of an electric power switch is detected through utilization of a signaling device, such as a light emitting diode (LED) that monitors energization of a dc power supply fed from the source side of the coil. A circu... | 04/25/2006 |
| 7009123 | Breaking detector for shear pin A breaking detector for a shear pin having a central bore, comprises an electrically conductive element forming an elongated loop extending on a length of the bore of the shear pin and having upper ends defining contact surfaces adjacent to each other. An electrical... | 03/07/2006 |
| 6980005 | Circuit protection device with timed negative half-cycle self test The present invention is directed to an electrical wiring protection device for use in coupling an AC power distribution system to at least one electrical load. The device includes an automated self-test circuit coupled to the AC power distribution system. The autom... | 12/27/2005 |
| 6937784 | Method and apparatus for MEMS optical switching using rotating mirrors An optical switching device uses a first set containing at least one MEMS mirror that receives light from a light source. A second set of MEMS mirrors are arranged to receive light from the mirror(s) of the first set. The mirrors can be independently aimed so any mi... | 08/30/2005 |
| 6926204 | Secure electronic device This invention relates to a secure electronic device comprising: at least an electronic circuit (10) containing information to be protected, an energy source (11); at ... | 08/09/2005 |
| 6924740 | Electrical resistance monitoring device A device for indicating whether a conductive element has an electrical resistance equal to or less than a predetermined value or whether the conductive element is reliably connected to earth reference potential by a resistance equal to or less than a predetermined v... | 08/02/2005 |
| 6812396 | Photovoltaic power generation system A solar cell array having an exposed electroactive portion is connected to a system power supply through an insulation transformer, a ground-fault interrupter is provided between the solar cell array and the system power supply, and a ground-fault detector is provid... | 11/02/2004 |
| 6744254 | Breaker failure annunciator system An annunciation system which will detect the majority of failed breakers and indicate to the consumer when a breaker needs to be replaced, but does not put the consumer in an emergency situation where critical loads have lost power. The annunication system provides ... | 06/01/2004 |
| 6697239 | Ground fault circuit interrupter for coaxial drop cable and method of operation A protective system for reducing the possibility of injury to individuals or damage to electrical equipment due to a fault in a coaxial drop cable connected between a tap unit receiving both RF signals and AC power from a main distribution line and a prem... | 02/24/2004 |
| 6611406 | Ground fault circuit interrupter incorporating miswiring prevention circuitry A ground fault circuit interrupter (GFCI) with built in intelligence is described that includes circuitry to automatically indicate a device miswiring condition. When a GFCI is wired with its AC and LOAD terminals reversed, downstream devices are still pr... | 08/26/2003 |
| 6560079 | Ground loss detection for electrical appliances A low cost, low parts count electronic circuit that is built into an appliance automatically and continuously checks for an open ground condition or a condition where the power conductors are transposed, at which time, power is interrupted in the applianc... | 05/06/2003 |
| 6437700 | Ground fault circuit interrupter A signaling system employing indicator lamp means and an audible alarm is employed to remind a user to periodically test his GFCIs and to provide information regarding the status of the GFCI. The power lines that supply the GFCI with power are also couple... | 08/20/2002 |
| 6320769 | Interconnection power converter and power generation apparatus using the same In a solar power generation apparatus using a solar battery having a relatively large ground capacitor and a power conditioner having a non-insulated input and output, a customer's ground fault interrupter may perform unwanted interruption due to a ground... | 11/20/2001 |
| 6226161 | Ground fault circuit interrupter incorporating miswiring prevention circuitry A ground fault circuit interrupter (GFCI) with built in intelligence is described that includes circuitry to automatically indicate a device miswiring condition. When a GFCI is wired with its AC and LOAD terminals reversed, downstream devices are still pr... | 05/01/2001 |
| 6212048 | Combination ground fault circuit interrupter/surge suppressor Combination ground fault circuit interrupter/surge suppressor which provides overvoltage protection for AC power lines, coaxial transmission lines and communication lines without a separate ground conductor.... | 04/03/2001 |
| 6052266 | Ground fault circuit interrupter A ground fault circuit interrupter (GFCI) interrupts the flow of current through a pair of lines extending between a source of power and a load. The GFCI includes a circuit breaker having a switch located in one of the pair of lines. The switch has a firs... | 04/18/2000 |
| 5966281 | Circuit breaker with thermal sensing unit A circuit protection apparatus includes a circuit breaker coupled in series with a circuit to be protected. The circuit breaker has a trip input and is responsive to a trip signal at the trip input for changing from a closed circuit condition to an open c... | 10/12/1999 |
| 5963408 | Ground fault circuit interrupter incorporating miswiring prevention circuitry A ground fault circuit interrupter (GFCI) with built in intelligence is described that includes circuitry to automatically indicate a device miswiring condition. When a GFCI is wired with its AC and LOAD terminals reversed, downstream devices are still pr... | 10/05/1999 |
| 5943198 | Electrical fault interrupt circuits A circuit for the avoidance of electrical shock and burns in an electrical appliance. Designed primarily for a two wire appliance, the device consists of a conditioning circuit at the load and a fault sensor/interrupter at the plug. The conditioning circu... | 08/24/1999 |
| 5844759 | Electrical fault interrupter An apparatus and method for the avoidance of electrical shock in an electrical appliance. Preferred for a two wire appliance, the device consists of a current interrupting circuit that impedes current flow for short time intervals in each half cycle. If a... | 12/01/1998 |
| 5793590 | Coaxial cable protection device A coaxial drop cable safety device is used for cable television, data and telephony applications. The device is used on buried drop cable where 60 Hz powering voltages applied to the drop cable exceed low voltage safety limits and where the drop cable is ... | 08/11/1998 |
| 5781387 | Shock hazard protection system A new and novel system for protecting people and property against electrical shock. It includes a number of preferred and other embodiments which have this as their goal, but which represent a number of distinctive and novel approaches to solving prior ar... | 07/14/1998 |
| 5729417 | Ground fault circuit interrupter incorporating miswiring prevention circuitry A ground fault circuit interrupter (GFCI) with built in intelligence is described that includes circuitry to automatically indicate a device miswiring condition. When a GFCI is wired with its AC and LOAD terminals reversed, downstream devices are still pr... | 03/17/1998 |
| 5706155 | Ground fault circuit interrupter incorporating miswiring prevention circuitry A ground fault circuit interrupter (GFCI) with built in intelligence is described that includes circuitry to automatically indicate a device miswiring condition. When a GFCI is wired with its AC and LOAD terminals reversed, downstream devices are still pr... | 01/06/1998 |
| 5631626 | Circuit for triggering warning lamps A circuit for triggering warning lamps including a self-conductive transistor circuit with a triggering circuit connected to the supply voltages. The triggering circuit keeps the transistor circuit blocked if the supply voltages are proper. If voltage fai... | 05/20/1997 |
| 5587865 | Electronic control equipment for motor vehicles, particularly, electronic brake control equipment Electronic control apparatus for motor vehicles. The apparatus includes a test circuit which causes a test current to flow through a load being operated by the apparatus and which detects the magnitude of the test current. From the magnitude of the test c... | 12/24/1996 |
