Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 8174270 | Systems and methods for assessing standoff capabilities of in-service power line insulators A high voltage power transmission system includes an insulator arranged to electrically isolate a live power transmission line and a testing device in physical contact with the insulator, The teat device measures properties of the insulator by conducting electrical ... | 05/08/2012 |
| 8159230 | Insulation measurement method and insulation measurement apparatus An insulation measurement method in an insulation measurement apparatus of a flying capacitor type, includes a first power supply charge voltage measurement process of applying a voltage of a power supply to a flying capacitor for a first charge time period a first ... | 04/17/2012 |
| 8115496 | Insulation coated conductor inspection method and inspection apparatus In an insulation coated conductor inspection method for inspecting an electrical insulation characteristic of an insulation coated conductor in a coil formed by winding the insulation coated conductor, the coil is disposed in a test container, an internal pressure o... | 02/14/2012 |
| 8106667 | Insulation measurement apparatus An insulation measurement apparatus includes a path including a first resistor, a capacitor electrically floated from a ground, and a second resistor between a positive to a negative electrode side of a power supply, a first switching element between the power suppl... | 01/31/2012 |
| 8093906 | System and method for testing winding insulation resistance A power electronics system configured to determine a condition of a winding insulation is disclosed. The system may include at least one capacitor, and a first resistance coupled to the at least one capacitor. The system may further include a plurality of electronic... | 01/10/2012 |
| 8013617 | Test method and apparatus for spark plug ceramic insulator A test method for a spark plug ceramic insulator includes placing a first electrode in an inner hole of the ceramic insulator and placing a second electrode on an outer peripheral side of the ceramic insulator, developing a defect in the ceramic insulator by the app... | 09/06/2011 |
| 7994799 | Insulation resistance detection system, insulation resistance detection apparatus and insulation resistance detection method An insulation resistance determining system (50) comprises an insulation resistance determining portion configured by connecting a coupling capacitor (52), a detection resistor (54), and a pulse oscillating circuit (56) in series with a c... | 08/09/2011 |
| 7990156 | Method and apparatus for measuring degradation of insulation of electrical power system devices A method for measuring degradation of electrical power system device insulation utilizes a conductive composite sensor. A selected polymeric matrix of the conductive composite provides a sensor resistance response that correlates to degradation of the insulation. Th... | 08/02/2011 |
| 7898264 | Motor insulation deterioration detection device Disclosed is an insulation deterioration detection device that can accurately detect insulation deterioration in multiple motors by a simple circuit configuration. When detecting insulation deterioration, one end A of a smoothing capacitor is connected via a first s... | 03/01/2011 |
| 7868624 | Method and system for correcting the feedback from electrical measurement converters to a device under test An approach is provided for correcting the feedback from electrical measurement converters to the device under test in the case of measurements in the high-frequency and/or microwave range. At least three measurements are implemented with respectively different inpu... | 01/11/2011 |
| 7659728 | Method and apparatus for measuring degradation of insulation of electrical power system devices A method for measuring degradation of electrical power system device insulation utilizes a conductive composite sensor. A selected polymeric matrix of the conductive composite provides a sensor resistance response that correlates to the mechanical degradation of the... | 02/09/2010 |
| 7554336 | Method for measuring the insulation resistance in an IT network A method for measuring the insulation resistance in an information technology (IT) network. The IT network has a DC voltage intermediate circuit and at least one self-commutated converter having at least one first and one second power switch. The IT network also inc... | 06/30/2009 |
| 7486084 | Apparatus and method for identifying the presence of high conductivity or permittivity conditions in electrically insulating materials An apparatus and method for detecting the presence of high conductivity or permittivity conditions in electrically insulating materials, including a first electrode and a second electrode for being placed in spaced-apart relation on an insulator to be tested for a h... | 02/03/2009 |
| 7348190 | Method of detecting a defect in a semiconductor device A method of detecting a defect in a semiconductor device may involve immersing a substrate into a chemical solution. The substrate may support a metal wiring and an insulation layer may cover the metal wiring. The chemical solution may permeate through the defect su... | 03/25/2008 |
| 7330342 | Safety tester having a high-voltage switching relay protected by an in-line electronic circuit breaker A multiple function safety compliance test instrument includes a high voltage output switching relay protected by a solid state in-line circuit breaker. ... | 02/12/2008 |
| 7327781 | Universal intelligent modem In one general aspect, data transfer between the modem and a processor connected to the modem may be improved using a variable speed buffer. The variable speed buffer may include one or more first-in/first out buffers (FIFOs) and two interfaces. The FIFOs may be con... | 02/05/2008 |
| 7317316 | Apparatus and method for measuring the insulation resistance of a fuel cell system A measuring device to measure the insulation resistance (Riso) of a fuel cell system with respect to an electrical ground point comprises a resistor arrangement—formed by a series connection of reference resistors—between two load-current lines of the fuel cell ... | 01/08/2008 |
| 7292048 | Method and apparatus for measuring a dielectric response of an electrical insulating system Method and device for measuring a dielectric response of an electrical insulating system, wherein a first measurement result is determined by a frequency domain method and a second measurement result is determined by a time domain method, whereupon the first measure... | 11/06/2007 |
| 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 |
| 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 |
| 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 |
| 7259583 | Methods and apparatus for testing power generators A method for testing a generator including a plurality of phase groups is provided. The method includes electrically isolating a first phase group from remaining phase groups by substantially encapsulating at least a portion of a plurality of stator bars electricall... | 08/21/2007 |
| 7256701 | Motor driver A motor driver capable of detecting the insulation deterioration of a motor easily and inexpensively is disclosed. The voltage supplied from an AC power supply (1) is rectified by a first rectifying circuit (D1 to D6) and smoothed by a capacitor... | 08/14/2007 |
| 7253639 | Insulation resistance deterioration detection method and insulation resistance deterioration detection device for motor, and motor driver The drive of the motor is stopped, the electromagnetic switch contacts are switched OFF, and thereafter the first and second contact points are closed to form a closed circuit of the smoothing capacitor, second contact point, first and second resistors, motor coil, ... | 08/07/2007 |
| 7253635 | Method for checking the electrical safety of a household appliance and corresponding household appliance A nominal setpoint value of the admissible power consumption of a household appliance is respectively set for each electrical component. The actual value of the current consumption of the household appliance is measured according to the electrical components used an... | 08/07/2007 |
| 7254514 | Method and system for predicting remaining life for motors featuring on-line insulation condition monitor A method and a system for determining a remaining time before failure of a motor system are provided. The method and the system determine the remaining time before failure based on historical motor data and operational parameter data associated with the motor system... | 08/07/2007 |
| 7245976 | Field apparatus A field apparatus for controlling a controlled element includes a diagnosis unit for diagnosing abnormality of the field apparatus and/or the controlled element and a bidirectional digital communication device to send a digital signal which shows a diagnosis result ... | 07/17/2007 |
| 7239147 | Method and device for inspecting secondary battery precursor and method for manufacturing secondary battery using the inspection method A method for testing a precursor of a secondary cell with high reliability and high efficiency to judge the precursor to be acceptable or defective. The current flowing when a test voltage is applied between a pair of electrodes is measured before an electrolyte is ... | 07/03/2007 |
| 7235998 | System and method for measuring time dependent dielectric breakdown with a ring oscillator An integrated circuit, in accordance with one embodiment of the present invention, includes a first device under test (DUT) module coupled to a first ring oscillator module and a second DUT module coupled to a second ring oscillator module. A dielectric layer of the... | 06/26/2007 |
| 7230205 | Compressor airfoil surface wetting and icing detection system In some instances, ice can form on the surface of a compressor airfoil. If the ice dislodges, it can impact and damage other compressor components. Aspects of the invention relate to systems for detecting the presence of ice or water on a compressor vane during engi... | 06/12/2007 |
| 7230812 | Predictive applications for devices with thin dielectric regions It is possible to predict with acceptable accuracy the time to failure of a device having a thin gate dielectric in a field effect transistor. Such prediction is based on the realization that for such thin dielectric multiple dielectric breakdown occurs before devic... | 06/12/2007 |
| 7220917 | Electrical wire and method of making an electrical wire An electrical wire has a conductor and a covering. The covering includes a thermoplastic composition having a poly(arylene ether), a polyolefin and a polymeric compatibilizer. The thermoplastic composition may further have a flame retardant. ... | 05/22/2007 |
| 7217885 | Covering for conductors The covering for used with a conductor having a thermoplastic composition. The thermoplastic composition has a poly(arylene ether), a polyolefin and a polymeric compatibilizer. The thermoplastic composition may further have a flame retardant. ... | 05/15/2007 |
| 7212022 | System and method for measuring time dependent dielectric breakdown with a ring oscillator An integrated circuit, in accordance with one embodiment of the present invention, includes a first device under test (DUT) module coupled to a first ring oscillator module and a second DUT module coupled to a second ring oscillator module. A dielectric layer of the... | 05/01/2007 |
| 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 |
| 7202672 | Partial discharge sensor A RF current transformer sensor includes a first sensor portion and a second sensor portion. The first and second sensor portions are configured to define a fixed opening for receiving a test object. The RF current transformer sensor is capable of detecting current ... | 04/10/2007 |
| 7193469 | System and method for testing gate oxide of an amplifier An amplifier system and method is provided for performing gate oxide integrity (GOI) testing of a power output field effect transistor (FET) of the amplifier system. The amplifier system and method provide for integrated test circuitry that protect drive components ... | 03/20/2007 |
| 7183774 | Method of detecting partial discharges and diagnostic system for electrical apparatus The invention provides a method of detecting partial discharges in an electrical appliance insulated in a receptacle and a system of diagnosing the state of the appliance using this method. With the help of an UHF antenna placed in the receptacle of the appliance, t... | 02/27/2007 |
| 7183776 | System and method for performing online partial discharge testing A partial discharge sensing system and method for conducting testing inside an enclosure includes a partial discharge sensor, an access port, and a signal cable. The partial discharge sensor is permanently installed at a test location inside the enclosure. The acces... | 02/27/2007 |
| 7176694 | Testing device and method of testing insulated handles used for servicing high voltage transmission lines A hot stick testing apparatus and method including a pair of generally ring-shaped electrodes spaced from one another at a predetermined distance. Each electrode has a central opening configured to receive the diameter of a hot stick under test positioned longitudin... | 02/13/2007 |
