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"What, sir, would you make a ship sail against the wind and currents by lighting a bonfire under her deck? I pray you, excuse me, I have not the time to listen to such nonsense."
Napoleon Bonaparte ; When told of the Robert Fulton steamboat
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| Number | Title | Issue Date |
| 8058881 | Method for checking the current flow through individual wires of a braided wire, and apparatus for carrying out the method In order to make it possible to detect a fault location, safely, reliably and with a high response sensitivity, in a braided wire which has a plurality of individual wires, an electric current is passed through the braided wire and the magnetic field which is formed... | 11/15/2011 |
| 7969157 | Fault detection circuit A fault detection circuit connects to and determines the occurrence of failure in an inverter circuit. The inverter circuit comprises three outputs to connect three groups of lamps respectively, and the fault detection circuit comprises a magnetic unit and a signal ... | 06/28/2011 |
| 7880473 | Non-invasive monitoring and diagnosis of electric machines by measuring external flux density System and methods for monitoring electric machines are provided. A magnetic field associated with the electric machine is measured at one or more points external to the electric machine, wherein a respective magnetic field value is associated with each of the one o... | 02/01/2011 |
| 7791353 | Ground loop locator Described is a ground loop locator. A readout on the ground loop locator indicates the presence of a ground loop when a ground loop exists in conductors linked by a current transformer of an exciter portion and a Rogowski coil of a detector portion. Also described a... | 09/07/2010 |
| 7443172 | Method and apparatus for the location and indication of cable splices and cable faults A method and apparatus for the location and indication of cable splices and cable faults is disclosed. An audio frequency generator can be coupled to a cable under test and the magnetic field generated by the cable can be monitored by a receiver. A receiver includes... | 10/28/2008 |
| 7439747 | Location of high resistance ground faults on buried power-cables The location of high resistance ground faults within buried co-axial power cables can be detected by transmitting a combined signal along the cable at a primary frequency of 0.718 Hz and a primary amplitude in the order of 4,500 volts peak to peak. This combined sig... | 10/21/2008 |
| 7403129 | Electrical switching apparatus and method employing acoustic and current signals to distinguish between parallel and series arc faults A circuit breaker includes a first lug and second and third acoustic lugs electrically connected to a power circuit. Separable contacts are electrically connected in series between the first lug and the second acoustic lug. An operating mechanism opens and closes th... | 07/22/2008 |
| 7366369 | Transmission of measured values in high-voltage supply units for electrofilters Disclosed is a high-voltage supply unit for electofilters. The unit includes high-voltage devices which are arranged close to the electrofilter and by which the electrofilter is supplied with high voltage, measuring heads which are assigned to the high-voltage devic... | 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 |
| 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 |
| 7355417 | Techniques for obtaining electromagnetic data from a circuit board A system is configured to obtain electromagnetic data from a circuit board. A set of sensing locations resides in a plane which is substantially parallel to the circuit board. The system includes a probe, a robotic assembly coupled to the probe, and a controller cou... | 04/08/2008 |
| 7317308 | System and method for measuring electric current in a pipeline A system for measuring a voltage differential in a current-carrying pipe using a propulsion vehicle for conveying the system inside the pipe. The system includes a first contact for maintaining electrical contact with the pipe as the vehicle moves through the pipe, ... | 01/08/2008 |
| 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 |
| 7301738 | Method and apparatus for minimally invasive network monitoring A method and apparatus for monitoring a communication network is provided. The network includes a plurality of node electronics units communicatively coupled to at least one central control processing unit through at least one network wherein each network includes a... | 11/27/2007 |
| 7301360 | Method and apparatus for inspecting flat panel display A novel method and apparatus inspects liquid crystal display. The method and apparatus for inspecting the flat display device scans at least one signal wire by using a magnetic sensor and detects a resistance change of the magnetic sensor to perceive a short in the ... | 11/27/2007 |
| 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 |
| 7288928 | Solenoidal Hall effects current sensor A device for measuring anode tube current or filament current in an X-ray tube, comprising a coil of wire wrapped around an insulating tube to generate a solenoidal magnetic field, one or more pieces of magnetic material and insulating material located within the tu... | 10/30/2007 |
| 7283806 | Wireless sensing system and method An apparatus and method is provided for sensing data relating to a structure (14), including an inspection site sensor system having at least one microprocessor (16) coupled to the structure. At least one sensor (12) for sensing data is connecte... | 10/16/2007 |
| 7276914 | System and method for guided TDR/TDT computerized tomography A system for detecting a defect or discontinuity in media or at an interface of the media includes a signal generator; a transmission path coupled to the signal generator, wherein the transmission path is arranged along or through the media; a detection circuit for ... | 10/02/2007 |
| 7273026 | Roller follower body The present invention relates to a roller follower, comprising an outer surface, enclosing a first cavity, a second cavity, and a transition opening, wherein the first cavity includes a first inner surface configured to house a cylindrical insert the second cavity i... | 09/25/2007 |
| 7253636 | Wire tracer receiver A method and apparatus includes a signal generator, a power supply, a micro-controller, a transmitter and a receiver for determining the condition of a line. The signal is passed through the line and any reflection is used to determine varying characteristics of the... | 08/07/2007 |
| 7253669 | High resolution digital loop circuit A digital feedback loop circuit achieves a resolution as good as the intrinsic resolution of the delay element of the circuit, notwithstanding the presence of a feedback counter/divider of integer value N that might otherwise be expected to multiply the minimum reso... | 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 |
| 7250781 | Circuit board inspection device A circuit board inspection device for inspecting the operation of a circuit board having a predetermined part or wire formed therein includes a supporting substrate disposed substantially in parallel with the parts mounting surface of the circuit board, and a signal... | 07/31/2007 |
| 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 |
| 7245506 | System for reducing noise induced from reference plane currents A method of reducing noise induced from reference plane currents is disclosed. The method includes routing a first path for an electrical trace on a circuit board such that the first path references a voltage plane. The method further includes routing a second path ... | 07/17/2007 |
| 7242178 | Digital cable toning apparatus and method A digital toner/locator employs tone packets using a 455 Khz. carrier. Plural packet quanta provide multiple test modes which are advantageously selected from a probe without requiring returning to the tone generator to change mode. A locate and isolate mode are pro... | 07/10/2007 |
| 7236338 | System and method for remotely detecting and locating faults in a power system A system and method are provided for remotely detecting and locating faults in a power system. The system includes at least one slave controller and at least one supplemental protection module. The slave controller is disposed proximate at least one load and electri... | 06/26/2007 |
| 7230413 | Flexible current sensor A method and a current sensor for measuring a current in a conductor. The sensor comprises a non-magnetic, flexible core member having a first end and a second end. A locking head having a channel therethrough is coupled to the first end of the core member. A first ... | 06/12/2007 |
| 7221283 | Circuit interrupter locator device A system for identifying a selected electrical circuit of interest from a number of electrical circuits, by locating a circuit interrupter connected to interrupt the flow of electrical power from an electrical power supply to the selected circuit of interest. The sy... | 05/22/2007 |
| 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 |
| 7209331 | Method and power feed for electrical inspections A device is provided for inspecting an installed electrical system including a power panel and branch circuits with respective circuit breakers. The device includes a power interface unit with a Ground Fault Circuit Interrupter (GFCI) for connection with the power p... | 04/24/2007 |
| 7208970 | Method and apparatus for inspecting flat panel display A novel method and apparatus inspects liquid crystal display. The method and apparatus for inspecting the flat display device scans at least one signal wire by using a magnetic sensor and detects a resistance change of the magnetic sensor to perceive a short in the ... | 04/24/2007 |
| 7205772 | Arc fault detector and method An arc fault detector includes a shunt resistor deployed in a protected circuit, an arc discriminator sensing voltages across the shunt resistor and producing an arc indication deduced from current variations associated with parallel and series arc faults, a signal ... | 04/17/2007 |
| 7183871 | Bi-directional access point An improved bi-directional access point includes an impedance boosting section in conjunction with an interface section to a bi-directional communication path. The impedance boosting section incorporates a transformer tap output that couples to an access connection ... | 02/27/2007 |
| 7180300 | System and method of locating ground fault in electrical power distribution system A method for locating a ground fault in an electrical power distribution system includes providing a plurality of current sensors at a plurality of locations in the electrical power distribution system. The method further includes detecting a ground fault in the ele... | 02/20/2007 |
| 7164274 | 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... | 01/16/2007 |
| 7157896 | Device for locating and identifying circuit breakers The transmitter of the circuit breaker locator draws large amplitude, short duration, phase locked unipolar pulses of current from the power source at a frequency lower than that of the AC line frequency. The audible and visual indicators of the transmitter are trig... | 01/02/2007 |
| 7151656 | Arc fault circuit interrupter system A system for determining whether arcing is present in an electrical circuit in response to a sensor signal corresponding to current in the circuit includes a circuit for analyzing the sensor signal to determine the presence of broadband noise in a predetermined rang... | 12/19/2006 |
| 7148696 | Electrical switching apparatus and method including fault detection employing acoustic signature A circuit breaker detects a fault, such as an arc fault or glowing contact, of a power circuit. The circuit breaker includes a first lug and a second acoustic lug adapted to be electrically connected to the power circuit. Separable contacts are electrically connecte... | 12/12/2006 |
