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| Number | Title | Issue Date |
| 7994795 | Shore power cord ground wire current detector A current detector and indicator unit are coupled to a shore power cord for monitoring for corrosion-causing galvanic current on the ground wire of the power cord. A current transducer coupled to the ground wire senses current and provides a signal corresponding to ... | 08/09/2011 |
| 7969154 | Methods for installing an antenna reception system Various systems, methods and apparatus are described for detecting an excessive or faulty ground current in a conductive wire or electronic device. A ground current detector is coupled to a known earth ground to determine whether other ground lines are carrying exce... | 06/28/2011 |
| 7944212 | Receptacle tester with text display A tester is disclosed for testing a wiring state of a live electrical receptacle outlet. The tester comprises a body having a display located thereon and a plug extending from the body. The display is configured to selectively provide a text indicator. When the plug... | 05/17/2011 |
| 7852090 | Apparatus, system and methods for ground current detection Various systems, methods and apparatus are described for detecting an excessive or faulty ground current in a conductive wire or electronic device. A ground current detector is coupled to a known earth ground to determine whether other ground lines are carrying exce... | 12/14/2010 |
| 7528609 | Electrical testing device The present invention is directed to an electrical testing device for use in an AC electrical power distribution circuit including a plurality of AC electric power transmitting wires coupled between an AC power distribution point and a device box. The device include... | 05/05/2009 |
| 7514932 | Method of recognizing signal mis-wiring of a three-phase circuit A signal analyzer for calculating the power consumption and power factor of a three-phase power system driving a motor includes logic that determines whether the analyzer's own input terminals are wired in a proper or inverted manner. To do this, the signal analyzer... | 04/07/2009 |
| 7446538 | Device for identifying AC power supply arrangement A device for identifying an arrangement of an AC power supply. The device includes first and second voltage detecting circuits and a comparison logic circuit. The first voltage detecting circuit, coupled to ground and hot lines of the AC power supply, receives a fir... | 11/04/2008 |
| 7385406 | Automated electrical wiring inspection system The present invention is directed to an electrical wiring inspection system. The system includes an electrical measurement apparatus having at least one load center connector configured to couple the electrical measurement apparatus to a load center, at least one br... | 06/10/2008 |
| 7366584 | Power tool system including a multi-core cable with an electronic memory module A power tool system includes a portable power tool (10), a stationary control unit (11), and a cable assembly (12), which includes a multi-core cable 15 and connection pieces (13, 14), for communicating power and/or signals between... | 04/29/2008 |
| 7365514 | Battery charger A universal battery charger is described for accommodating a range of batteries. An adapter or connector is provided for each different type of battery which engages the standard housing including the main power supply. The adapter includes electronics which control... | 04/29/2008 |
| 7365950 | Wiring error detection circuit A wiring error detection circuit for providing the status of the wiring of an AC outlet and the status of the AC outlet's ground connection. ... | 04/29/2008 |
| 7358717 | Input by-pass circuit for a current probe An input by-pass circuit for a current probe has first and second switches coupled between current probe inputs and current sensing circuit inputs. A switch control is coupled to the switching circuit for selectively coupling and decoupling the current probe inputs ... | 04/15/2008 |
| 7323878 | Ground testing method and apparatus The present invention is directed to a ground-current isolating circuit for providing a low voltage barrier between a service neutral conductor and an associated grounding system. The voltage barrier circuit comprises a first current unidirectional element and a sec... | 01/29/2008 |
| 7323880 | Ground circuit impedance measurement Novel apparatus and method accurately measure ground circuit impedance. A ground circuit and electrical current source adjusted to 25 amperes or less simulate a ground fault. Ground impedance is determined by dividing voltage drop by amperage to determine impedance ... | 01/29/2008 |
| 7307408 | Cable locating device A device for identifying individual cables communicating between many remote locations to one central location using the building AC ground circuit to communicate between the remote location and the central location. The device includes a plurality of tubes adapted ... | 12/11/2007 |
| 7282921 | System, apparatus and method for detection of electrical faults System for monitoring an electrical system of a facility includes one or more local sensing devices, each of which is adapted to be connected to the electrical system of the facility in proximity to a respective load that receives power from the electrical system so... | 10/16/2007 |
| 7271597 | Electronic device, transmission system, and method for determining connection condition An electronic device has a first signal path, a first power supply path, and a connector that transmits to an external device the input signal on which the voltage has been superposed. The device also has a first power supply switch inserted into the first power sup... | 09/18/2007 |
| 7259567 | Power tester for electrical outlets A power tester apparatus for testing an electrical outlet. The power tester apparatus includes multiple indicators for identifying the condition of the electrical outlet. ... | 08/21/2007 |
| 7253633 | Threshold adjustment accuracy for ground fault condition determination A polyphase power system with a system safety ground supplies a plurality of power phases over a respective plurality of power lines to power a load. A plurality of phase fault detectors of a fault detection component monitor the plurality of power lines, respective... | 08/07/2007 |
| 7254005 | AC plug and electrical apparatus provided with same An AC plug provided with a plug casing and prongs formed sticking out from the inside of the plug casing to the outside and supplying AC power supplied from a power outlet to the prongs by an AC cord connected to the prongs inside the plug when the prongs are insert... | 08/07/2007 |
| 7248056 | Three-phase electrical receptacle tester A three phase receptacle tester including a housing, an electrical connection and a coupling assembly. The housing includes an outer surface, an opening and an inner cavity, wherein the opening provides access to the inner cavity. The electrical connection assembly ... | 07/24/2007 |
| 7164273 | Power source monitor A power source monitor and method to monitor various operating line conditions of an electrical power outlet comprising measuring line voltage and frequency, analyzing wiring conditions, displaying the line conditions and generating an alarm when any of the line con... | 01/16/2007 |
| 7148698 | Fuse saving tester for fused circuit In one form, tester for an electrical system, such as for a vehicle, develops repetitively applied, short duration, control current pulses for reducing load current pulses through the electrical system. An operator connects a pair of input contacts across a fuse hol... | 12/12/2006 |
| 7136266 | Leakage current detection interrupter extension cord with cord diagnostics In the present invention the basic detection and interruption components of an Immersion Detection Circuit Interrupter (IDCI), in combination with the line, neutral and shield conductors of an extension or appliance cord provides a new improved type of detector, a L... | 11/14/2006 |
| 7102296 | Screw-in transformer An apparatus for providing convenient transforming of electrical energy from a first voltage level to a second voltage level, includes a housing having an end wherein the end includes a conductive threading and a contact for making an electrical connection with a li... | 09/05/2006 |
| 7102344 | Circuit tester A circuit testing device includes a housing that is sized and adapted to securely fit into a light bulb socket. The device includes spring-loaded prongs which securely hold the housing in place in the socket until it is desired to remove the testing device. The test... | 09/05/2006 |
| 7099129 | 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 protected in ... | 08/29/2006 |
| 7095240 | Method of an apparatus for testing wiring A test system employing a plurality of disconnect devices is provided. Each load, such as a lamp, has a local disconnect device which temporarily disconnects the load in order to protect it from high voltage during the test. ... | 08/22/2006 |
| 7091723 | AFCI circuit test module An arc fault circuit interrupter (AFCI) module includes a plug portion, a probe receiving portion and an AFCI test actuator for initiating a test of an AFCI protected circuit. More specifically, the plug portion includes a plurality of prongs configured to matingly ... | 08/15/2006 |
| 7088564 | Grounding module with an AC outlet A grounding module comprising a housing, an AC plug, a female outlet, a ground sensing-circuit for determining whether or not a ground is present when the AC plug is inserted into an AC outlet and an external ground connection for providing the ground to an electric... | 08/08/2006 |
| 7071699 | Non-load driven fault monitor for electrical circuits A fault monitor for the load portion of an electrical circuit may be connected to an existing circuit by a single connection, and may detect flaws within the load portion of the circuit through the detection of changes in voltage through a resistor, caused by change... | 07/04/2006 |
| 7068038 | 240 volt outlet tester A 240 volt outlet tester is described. The 240 volt outlet tester includes a housing with three or four prongs extending outwardly from a base of the housing. The prongs are designed so that they can be inserted into either a three or four wire 240 volt outlet. Indi... | 06/27/2006 |
| 7068040 | Ground circuit impedance measurement apparatus and method Novel ground circuit impedance measurement apparatus and method accurately measure ground circuit impedance. A ground circuit and electrical current source of 25 amperes or less simulate a ground fault. Ground impedance is determined by dividing voltage drop by ampe... | 06/27/2006 |
| 7068037 | Method of diagnosing inverter trouble Disclosed is a method of diagnosing inverter trouble capable of improving convenience of use and safety of the user by notifying the user of the error of switching devices used for outputting AC voltage of the inverter and the earth fault of an output of the inverte... | 06/27/2006 |
| 7061248 | Electrical utility service tester An electrical utility service tester that is used for troubleshooting 120/208 or 120/240, three phase or single phase alternating current electrical utility services where 120 volt hot leg leads of the electrical utility services are connected 120 volts to ground on... | 06/13/2006 |
| 7057401 | Electrical wiring inspection system A system for testing and documenting the electrical wiring in a building, for example, includes a Portable Circuit Analyzer (PCA) that is connected to the building's Load Center through an umbilical cord. The PCA is in wireless communication with a hand-held compute... | 06/06/2006 |
| 7046157 | Short circuit detector for shield conductor in a fieldbus network A short circuit detector for a fieldbus network which includes power/data wires that are typically positive and negative, respectively, and a shield conductor connected to a ground includes first and second high-impedance semiconductor circuits coupled between each ... | 05/16/2006 |
| 7030624 | Electrical circuit tester An electrical circuit testing device is provided, comprising a case, a digital voltage level testing circuit with a display means, a switch to initiate measurement using the device, a non-shorting switching means for selecting pre-determined electrical wiring config... | 04/18/2006 |
| 6982558 | Electric circuit test device The present invention is directed to an electric circuit test device for testing an electric circuit. The test device is insertable into a receptacle. The receptacle includes electrical terminals coupled to the electrical circuit. The device includes a housing chara... | 01/03/2006 |
| 6979787 | Article for de-energizing a branch electrical circuit, and related processes A device for de-energizing an energized branch electrical circuit is described, as well as related processes. The device includes a circuit breaker, which itself includes a breaker switch, an input terminal for receiving current, and an output terminal for directing... | 12/27/2005 |
