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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 7885050 | Amplification relay device of electromagnetic wave and a radio electric power conversion apparatus using the above device The present invention provides an amplifying repeater, which is constructed in such a manner that a ferrite core is inserted into a coil with a pre-determined number of winds to increase an induced electromotive force caused by an increase in flux linkage using a ti... | 02/08/2011 |
| 7372279 | Power generation unit condition monitor using frequency profile analysis A power generator unit condition monitoring system can receive a frequency profile generated by a frequency generating component and can transmit the received frequency to a frequency profile analyzer. The frequency profile analyzer analyzes the transmitted frequenc... | 05/13/2008 |
| 7359170 | RF circuit electrostatic discharge protection A padring formed on a semi conductive substrate die provides Electro Static Discharge (ESD) protection for a Radio Frequency (RF) circuit also formed on the semi conductive substrate die. The padring includes a voltage supply rail, a ground rail, a plurality of sign... | 04/15/2008 |
| 7304829 | Apparatus and method for filtering current sensor output signals An electronic filter for filtering the output signal of a current sensor of a circuit breaker is disclosed. The current sensor has an output signal characteristic similar to that of a Rogowski coil output signal characteristic that includes a third harmonic noise co... | 12/04/2007 |
| 7301440 | Power line communication system and method The present invention provides a device for providing communications through power lines comprised of multiple conductors by transmitting the data signals through a plurality of the conductors. One embodiment of the present invention may be comprised of a transmit c... | 11/27/2007 |
| 7292053 | High-voltage measuring device The present invention provides a high-voltage measuring device capable of providing sufficient electric isolation between resistors and between resistors and a voltage measurement circuit without necessity of enlarging a size of a substrate for carry thereon the cir... | 11/06/2007 |
| 7289290 | Method of controlling track seek servo in disk drive and apparatus therefor A method of controlling a track seek servo in a hard disk drive and an apparatus therefor. A method of controlling a track seek servo includes moving a transducer to a track with an acceleration trajectory generated by a convolution operation, a rate of change of ac... | 10/30/2007 |
| 7289302 | On slider inductors and capacitors to reduce electrostatic discharge damage A slider for use in a magnetic disk drive includes read pads for connecting to a flexible circuit that couples to a pre-amplifier circuit, a transducer, and a protector connected to the transducer and the read pads to protect the transducer against damage from elect... | 10/30/2007 |
| 7280332 | On-chip ESD protection circuit for compound semiconductor heterojunction bipolar transistor RF circuits A low loading capacitance on-chip electrostatic discharge (ESD) protection circuit for compound semiconductor power amplifiers is disclosed, which does not degrade the circuit RF performance. Its principle of operation and simulation results regarding capacitance lo... | 10/09/2007 |
| 7265433 | On-pad broadband matching network A chip is provided in which an on-chip matching network has a first terminal conductively connected to a bond pad of the chip and a second terminal conductively connected to a common node on the chip. A wiring trace connects the on-chip matching network to a circuit... | 09/04/2007 |
| 7259952 | Process control instrument intrinsic safety barrier A process control instrument includes a circuit board having a control circuit for generating or receiving a high frequency signal. An antenna includes an electrical conductor. An intrinsic safety circuit couples the control circuit to the antenna and comprises a mi... | 08/21/2007 |
| 7253640 | Arc fault detector and method for locating an arc fault A circuit breaker for locating an arc fault for a protected circuit includes separable contacts interrupting the protected circuit and an arc fault detector determining an arc fault in the protected circuit. An analog to digital converter circuit measures a value of... | 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 |
| 7248844 | Radio frequency integrated circuit electo-static discharge circuit The radio frequency integrated circuit (RFIC) electrostatic discharge (ESD) circuit includes an integrated circuit pin and a radio frequency (RF) ESD circuit. The integrated circuit pin provides coupling to an antenna. The RF ESD circuit is operably coupled to the i... | 07/24/2007 |
| 7218491 | Electrostatic discharge protection unit including equalization An electrostatic discharge protection unit includes a channel, a passive filter, and an electrostatic discharge protection circuit. The passive filter and the electrostatic discharge protection circuit are formed on a substrate. The electrostatic discharge protectio... | 05/15/2007 |
| 7211740 | Valve metal electromagnetic interference filter A valve metal electromagnetic interference filter (VMEIF). The filter comprises a porous valve metal pellet with at least three terminals extending therefrom. A dielectric layer at least partially circumvents the sintered porous valve metal pellet. A conductive laye... | 05/01/2007 |
| 7187161 | Transient protection of sensors The present invention includes a system with a sensor to detect a change in one or more physical characteristics and provide a corresponding electrical sensor signal, a controller including a power source for the sensor, and transient suppression circuitry. This cir... | 03/06/2007 |
| 7176786 | Method of isolating data in a power line communications network The present invention provides isolation between a power line local area network and another network such as a power line wide area network. In one embodiment of the present invention, a filter device is installed on the power line supplying power to a structure in ... | 02/13/2007 |
| 7151298 | Electrostatic discharge protection network having distributed components An electrostatic discharge protection network comprising electrostatic discharge (ESD) clamp devices distributed between turns of a coil shaped inductor. The inductance of the coil shaped inductor and parasitic capacitance of the ESD clamp devices form a low pass fi... | 12/19/2006 |
| 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 |
| 7142411 | Methods and apparatus for distributing power in a computerized device In a computerized device requiring a relatively large amount of power during operation (e.g., between approximately 10 kW to 15 kW) at a relatively large current (e.g., between approximately 200 and 300 amperes), an electrical conductor or power distribution assembl... | 11/28/2006 |
| 7138730 | Topologies for multiple energy sources A system and method for converting power are disclosed. Briefly described, one embodiment comprises a first power source having a first-source positive terminal and a first-source negative terminal; a second power source having a second-source positive terminal and ... | 11/21/2006 |
| 7136265 | Load recognition and series arc detection using bandpass filter signatures A method and system for determining whether arcing is present in an electrical circuit includes sensing a change in an alternating current in the circuit and developing a corresponding input signal, analyzing the input signal to determine the presence of broadband n... | 11/14/2006 |
| 7132819 | Floating power supply and method of using the same A power supply of the present invention comprises a transducer having a transducer and a voltage regulator. The transducer is coupled to an electrically non-conductive medium, which may be a light pipe. The electrically non-conductive medium is coupled to a non-elec... | 11/07/2006 |
| 7111983 | Temperature detection method and apparatus for inverter-driven machines A resistance temperature detector device and system are provided for measuring the temperature adjacent to windings within a stator assembly. The resistance temperature detector comprises a resistive element enclosed within a plurality of insulative layers, includin... | 09/26/2006 |
| 7106024 | Filter with increased first harmonic response and reduced phase shift in a wide frequency band for encoderless drive applications A method and apparatus for use with a controller that supplies voltages to an induction machine via supply lines, the voltages including a fundamental voltage component and an injected voltage component, the line voltages also including harmonic voltage components w... | 09/12/2006 |
| 7103240 | Method and apparatus for providing inductive coupling and decoupling of high-frequency, high-bandwidth data signals directly on and off of a high voltage power line The present invention is drawn to an electrically “closed” method and apparatus for transmitting and receiving data signals over a high voltage power line. Inductive coupling is employed for coupling and decoupling the data signal directly on to and off of a sin... | 09/05/2006 |
| 7102478 | Power line coupling device and method of using the same The coupling device of the present invention includes a housing, a first fastening member attached to said housing and coupled to the power line, a second fastening member attached to the housing and coupled to the power line, an inductor providing an impedance to d... | 09/05/2006 |
| 7096599 | Household appliance A household appliance (1) e.g a washer-dryer, comprises an enclosure (2) into which objects to be heated are placed, a magnetron (4) for generating microwaves, a waveguide (3) for feeding the generated microwave into the enclosure, an arc... | 08/29/2006 |
| 7092229 | Electrical filter/protector, and methods of constructing and utilizing same A device for an electrical power system having a nonlinear load. The circuit is connected in series with the nonlinear load and is tuned to the third harmonic of the power source frequency. The circuit substantially eliminates the harmonic currents and neutral curre... | 08/15/2006 |
| 7075414 | Device and method for communicating data signals through multiple power line conductors The present invention provides a device for providing communications through power lines comprised of multiple conductors by transmitting the data signals through a plurality of the conductors. One embodiment of the present invention may be comprised of a transmit c... | 07/11/2006 |
| 7068480 | Arc detection using load recognition, harmonic content and broadband noise A method of determining whether arcing is present in an electrical circuit includes sensing a change in current in the circuit and developing a corresponding input signal, analyzing the input signal to determine the presence of broadband noise in a predetermined ran... | 06/27/2006 |
| 7064654 | Power line communication system and method of operating the same A system for operating a power line communication system is provided. One embodiment is comprised of a plurality of network elements, which may take the form of repeaters, bypass devices, backhaul devices, wireless backhaul devices, enhanced bypass devices, communic... | 06/20/2006 |
| 7058173 | Multi-stage isolation barrier circuitry and method for connection of a telephony device to a telephone line A multi-stage surge protector/isolation barrier is provided for connection between a telephony device and a telephone network. The multi-stage surge protector/isolation barrier includes a first stage and a second stage. The first stage is operative to limit or clamp... | 06/06/2006 |
| 7053756 | Facilitating communication of data signals on electric power systems The invention includes a method, system, and device for communicating a data signal on an electric power system. The inventive method includes communicating the data signal to the electric power system, and modifying the characteristics of the electric power system ... | 05/30/2006 |
| 7052283 | Sheath current attenuator for coaxial cable A device for use with coaxial cable to attenuate sheath currents associated therewith. The device is adapted to be coupled to incoming and outgoing coaxial cables and includes a ferrite core configured as a first hollow cylinder mounted coaxially within a housing co... | 05/30/2006 |
| 7046124 | Power line coupling device and method of using the same The coupler of the present invention couples broadband RF signals to and from a power line conductor. The coupler of one embodiment that is for use with overhead power lines includes a length of URD MV cable with the neutral conductor removed and that is communicati... | 05/16/2006 |
| 7027279 | Combined harmonic filter and phase converter or phase shifting device A harmonic mitigating device also functions as a phase converter for supplying single-phase non-linear loads, or as a phase shifting device for three-phase non-linear loads with multiple inputs to create a quasi multi-pulse system. A multiple-winding reactor or a pl... | 04/11/2006 |
| 7023678 | ESD protection designs with parallel LC tank for giga-hertz RF integrated circuits An ESD protection circuit design incorporating a single, or a plurality of, parallel inductor and capacitor, also known as LC tank(s), to avoid power loss by parasitic capacitance in ESD circuits. The first design described incorporates a LC tank structure. The seco... | 04/04/2006 |
| 7023677 | ESD protection designs with parallel LC tank for Giga-Hertz RF integrated circuits An ESD protection circuit design incorporating a single, or a plurality of, parallel inductor and capacitor, also known as LC tank(s), to avoid power loss by parasitic capacitance in ESD circuits. The first design described incorporates a LC tank structure. The seco... | 04/04/2006 |
