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| Number | Title | Issue Date |
| 7737705 | State detecting method and insulation resistance detector There is provided a state detecting method adopted to an insulation resistance detector including the steps of: calculating a difference between the output of the filter when a pulse signal having a first pulse width is applied to the series circuit, and the output ... | 06/15/2010 |
| 7386411 | Automatic hi-pot test apparatus and method An exemplary automatic hi-pot test apparatus (20) includes a high voltage supply (21), a transmission device configured for transmitting an electronic device (26) to be tested, a connecting device electrically connected to the high voltage suppl... | 06/10/2008 |
| 7371019 | Method and apparatus for sensing light Disclosed is an optical apparatus including an optical fiber having a wavelength of operation, the optical fiber comprising a first length of the optical fiber joined to a second length of the optical fiber with a splice such that the first and second lengths are in... | 05/13/2008 |
| 7312970 | Low cost surge protection A motor drive for an electric machine includes a live line, a second line, and a ground line. A surge protector includes a first varistor and a gas discharge tube (GDT) that is non-conductive below a trigger voltage and that is conductive above the trigger voltage. ... | 12/25/2007 |
| 7294996 | Characteristic evaluating system and characteristic evaluating method The characteristic evaluating system of the present invention includes: a cable-driving transmitter transmitting a signal to one end of a cable to be measured; a load connected to the other end of the cable; a probe detecting a common mode current of the cable; a re... | 11/13/2007 |
| 7285961 | Insulation degradation diagnostic device An insulation degradation diagnostic device (1a) comprises a current transformer (7a), a first amplifier (15), a first high-pass filter (17), a low-pass filter (19), a second amplifier (20), a second high-pass ... | 10/23/2007 |
| 7277822 | Embedded system for diagnostics and prognostics of conduits An apparatus providing a means for assessment of the integrity of insulated conduits, harnesses, cables, pipelines and other interconnection systems constructed with integral sensitized media, discrete sensors, and electronics providing a means for transforming sens... | 10/02/2007 |
| 7271598 | Conductor coil defect identifier A system and method for detecting a defect in an actuator arm conductor coil is disclosed. An actuator arm including a conductor coil is received. The conductor coil is coupled with a voltage as an anode. The conductor coil is submerged into a first solution, the fi... | 09/18/2007 |
| 7208958 | Antenna for detection of partial discharges in a chamber of an electrical instrument A sensor for picking up partial discharges in an electrical equipment tank filled with a dielectric fluid includes an antenna responsive to the electromagnetic waves generated by such partial discharges. In the sensor, the antenna is formed by two electrodes that ar... | 04/24/2007 |
| 7154349 | Coupled-inductor multi-band VCO A multi-band VCO employs a coupled-inductor based resonator having N≧2 ports. Each port has an inductor and at least one capacitor. The N inductors for the N ports are magnetically coupled. The inductors/ports may be selectively enabled and disabled to allow the V... | 12/26/2006 |
| 7139668 | Wire event detection Classifying a portion of an electrical signal propagating through a conductor includes digitizing the electrical signal to provide a digitized signal, providing a plurality of stored digitized signals, wherein each stored digitized signal corresponds to a type of fa... | 11/21/2006 |
| 7129711 | Device for detecting interferences or interruptions of the inner fields smoothing layer of medium or high voltage cables A device for controlling the manufacture of a medium or high voltage cable in particular of the inner and outer semi-conducting layers. For control purposes the current or capacitance is measured by a measuring electrode encircling the cable and connected to a high ... | 10/31/2006 |
| 7120563 | Wire fault detection Described are techniques used in a wire diagnostics system to detect events, such as defects, that may occur within a wire or cable under test. An incident voltage signal is sent out on the wire and a measured voltage signal is obtained which includes the incident v... | 10/10/2006 |
| 7109722 | Apparatus and method for PCB smoke and burn detection and prevention An apparatus and method for at least one of detecting and preventing burning of a PCB is disclosed. The method includes configuring a first comb array defined by a plurality of first fingers at a first potential; configuring a second comb array defined by a pluralit... | 09/19/2006 |
| 7106071 | Cable diagnostics using time domain reflectometry and applications using the same A system and method are used to determine connectivity and/or cable faults of a cable. A signal transmitting and receiving system is coupled to the cable. An analog-to-digital converter (ADC) coupled to the signal transmitting and receiving system. A TDR system coup... | 09/12/2006 |
| 7096165 | Method for configuring an electrical installation and corresponding configuration device A network map is determined, either in the operating direction from the feed circuit to the load in the load circuit, or backward on the basis of the loads in the load circuit to the data for the feed circuit. The feed circuit and the load circuit are coupled to a v... | 08/22/2006 |
| 7088257 | Systems and apparatus for secure shipping A container is provided. The container includes a casing having an opening for admitting contents into the container. A matrix of conductive lines extends across at least a portion of the casing. A sensor senses a breach of integrity of the matrix. An indicator indi... | 08/08/2006 |
| 7079961 | Method and apparatus for measuring impedance of electrical component under high interference conditions A test system and method having a test channel and an additional channel, and wherein the ratio of amplitude and phase between the interference current through the device under test and the interference signal on the additional channel are determined. The system fur... | 07/18/2006 |
| 7068042 | Method and apparatus for monitoring integrity of wires or electrical cables An apparatus for monitoring the integrity of a wire is provided, which includes a TDR instrument for generating a pulse waveform for transmission through the wire. The apparatus also includes a function generator for generating an electrical or non-electrical forcin... | 06/27/2006 |
| 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 |
| 7042229 | System and method for on line monitoring of insulation condition for DC machines Insulation condition monitoring systems and methods for a rotating DC electric machine, the method comprising: measuring a first set of values for an instantaneous differential current and an instantaneous voltage during operation of the rotating DC electric machine... | 05/09/2006 |
| 7030621 | Low current AC partial discharge diagnostic system for wiring diagnostics A system and method for detecting partial discharges or arcing in wiring or cables is disclosed. The system employs a high-voltage AC power source to generate a high-voltage low-current AC waveform, which is propagated through a selected wire, which in turn, produce... | 04/18/2006 |
| 7026824 | Voltage reference generator with negative feedback A voltage reference generator for generating an output voltage at an output node. A level shifter shifts a first reference voltage into the output voltage at the output node according to a shift between the first reference voltage and the output voltage, and a feedb... | 04/11/2006 |
| 7019531 | Procedure and device for the evaluation of the quality of a cable A procedure and a system for the evaluation of the quality and/or efficiency of a cable or a cable segment by a current measurement is disclosed. This is achieved by supplying between the core and the screen of a cable a voltage with alternating polarity and rectang... | 03/28/2006 |
| 6977509 | System and method for high voltage testing of twisted insulated conductors A system and method for high voltage testing of twisted insulated conductors includes a high voltage power supply to be disposed within a rotating mechanism of a twinner. An electrode is coupled to the power supply and is to be disposed adjacent to a take-up reel wi... | 12/20/2005 |
| 6978226 | Deterioration diagnostic method and equipment thereof A deterioration diagnosis method, wherein the amount of weight loss of a metallic material due to corrosion in atmospheric air for the exposure days is formulated as a function for environmental assessment points which represents a level of a harmfulness of the atmo... | 12/20/2005 |
| 6975312 | Computer system having network connector and method of checking connection state of network cable therefor A computer system having a network connector to which a network cable is connected, including a displaying part displaying a connection state of the network cable; a signal processing part processing a signal inputted through the network connector; and a control par... | 12/13/2005 |
| 6973594 | Method and apparatus for disabling a computer system bus upon detection of a power fault One embodiment of a system for disabling a computer bus upon detection of a power fault includes a bus bridge device coupled to a bus and a power regulator that delivers power to the bus. If the power regulator detects a power fault, then the power regulator asserts... | 12/06/2005 |
| 6972574 | Method and apparatus for monitoring integrity of wires or electrical cables An apparatus for monitoring the integrity of a wire is provided, which includes a TDR instrument for generating a pulse waveform for transmission through the wire. The apparatus also includes a function generator for generating an electrical or non-electrical forcin... | 12/06/2005 |
| 6970063 | Power transformer/inductor The present invention relates to a power transformer/inductor comprising at least one winding. The windings are designed by means of a high-voltage cable, comprising an electric conductor, and around the conductor there is arranged a first semiconducting layer, arou... | 11/29/2005 |
| 6954076 | Aircraft multi-function wire and insulation tester An aircraft multi-function wire and low voltage insulation tester, having a time domain reflectometer, a digital multi-meter, and a matrix switch integrated in a computer, and a connector having a plurality of output pins allowing a plurality of wires to be hooked u... | 10/11/2005 |
| 6949858 | Insulated code stud for rotor and stator laminations An insulated core stud for use in the core structure of at least one of a stator and a rotor of a dynamoelectric machine is adapted to pass through holes contained in laminations of the core structure. The insulated core stud has a central portion and a first layer ... | 09/27/2005 |
| 6949933 | Apparatus and method for monitoring electrical cable chafing via optical waveguides A method and apparatus for using optical waveguides to detect chafing of electrical cables. Chafing damage is preferably detected by disposing several optical waveguides about the periphery of an electrical cable such that any chafing that causes damage to the elect... | 09/27/2005 |
| 6922060 | Method for detecting partial conductor short circuits, and device for performing and using the method In a method for detecting partial conductor short circuits (7) in a conductor (11) including plural mutually insulated partial conductors (5) in which the partial conductors (5) are connected together at one or both ends of the conductor ... | 07/26/2005 |
| 6879164 | Method and device for insulation monitoring of a DC network A method and device for insulation monitoring of an electrically insulated DC network by measuring of the insulation resistance using galvanic isolation between a measuring resistor which is connected to ground, and a measuring pulse generator, and a measurement-dat... | 04/12/2005 |
| 6876203 | Parallel insulation fault detection system A device for detecting and locating arcs in a set of wires is discussed. The device comprises a probe for discharging controlled current to an exposed portion of a wire in the set of wires. The probe includes a handleable enclosure and an elongated structure which p... | 04/05/2005 |
| 6864688 | Apparatus and method of monitoring insulation of a DC network that is electrically insulated with respect to the ground potential of a device Insulation monitoring of an electrical network such as a DC network which is electrically insulated with respect to the ground of a device, includes at least two insulation monitoring devices that monitor different network sections, which can be isolated by one or m... | 03/08/2005 |
| 6850112 | Device for controlling a circuit generating reference voltages Control device for a generation circuit (REF) for reference voltages (VPOL1, VPOL2), includes a first P type MOS transistor (M12), connected between a node (N) to which a high voltage signal (EHV) is applied and a first intermediate node (A), a ... | 02/01/2005 |
| 6812712 | Wire test method and apparatus A wire testing method and apparatus test wire in-situ in a rigidly installed state, such as an aircraft. An apparatus for rapidly switching the excitation voltage and ground compensates for stray currents. The apparatus outputs a stray current signal, a detected sig... | 11/02/2004 |
| 6806719 | Insulation inspection apparatus for motor An insulation inspection apparatus flows a current into power lines arranged along power lines of motors and sequentially switches relays to measure electromotive forces induced in the power lines of the DC motor, so that the insulation characteristics of the motors... | 10/19/2004 |
