Bizarre Patents
A new toilet tank assembly aquarium for housing aquatic creatures.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7956619 | Testing an inductive load of a device using a modulated signal A device has built-in inductive load testing capabilities. The device includes a device housing, an inductive load disposed within the device housing; and test circuitry disposed within the device housing. The test circuitry is constructed and arranged to effectuate... | 06/07/2011 |
| 7800377 | Apparatus and method for current transformer adaptation An apparatus and method for current transformer adaptation for extending a distance between a current sensing location, having a load current carrying load conductor, and a current measuring location having a measuring instrument. A first current transformer adapted... | 09/21/2010 |
| 7741854 | Method of in slot tightness measuring of stator coil A method for measuring a tangential tightness of a stator coil within an armature slot of a stator assembly in an electric generator. The stator coil is excited to produce a vibratory response therein. The vibratory response of the stator coil is detected and a freq... | 06/22/2010 |
| 7723997 | Method and arrangement for the detection of a coil A method and an arrangement for the detection of a coil in an electronic circuit, which is operated with a direct voltage lying within a prescribed voltage range, and in which the coil together with a condenser forms an electrical oscillating circuit. ... | 05/25/2010 |
| 7609069 | Method to detect shorted solenoid coils A method for testing the continuity of a coil that is subjected to a high frequency pulse modulated current that includes sensing a coil voltage, determining a ratio of the sensed coil voltage to the supply voltage and comparing the ratio to a threshold to determine... | 10/27/2009 |
| 7405917 | Method and apparatus for monitoring and determining the functional status of an electromagnetic valve The present invention provides a method and apparatus for determining the functional status of an electromagnetic valve having a solenoid and plunger including determining the electro-mechanical switching time of a valve based on characteristics of an electrical cha... | 07/29/2008 |
| 7397222 | On-line testable solid state reversing DC motor starter A solid state reversing DC motor starter that is testable on-line and satisfies the requirements for nuclear safety grade equipment. The motor starter employs a bridge of solid state switches which connect the polarity of the motor winding to conform to the desired ... | 07/08/2008 |
| 7357216 | Electric power steering apparatus A ball bearing 34 serving as a support reference for a pinion shaft 2 is located directly under a worm wheel 51. Thus, even when a temperature change occurs around the electric power steering apparatus, the engagement position between the worm w... | 04/15/2008 |
| 7339394 | Current sensing in a two-phase motor A method and apparatus for measuring current by a single sensor for two motor phases driven by first and second set of switches to drive respective first and second phases of a motor under control of PWM signals. A first step 100 includes reading a duty cycle... | 03/04/2008 |
| 7336464 | Power limiting circuit A power limiting circuit is disclosed. The power limiting circuit includes a temperature sensing circuit that outputs a temperature signal that is proportional to temperature over a temperature range. The power limiting circuit also includes a regulation circuit cou... | 02/26/2008 |
| 7293554 | Ignition coil driver device with slew-rate limited dwell turn-on A device to control the charging rate of an ignition coil for an internal combustion spark ignition engine. The device controls the turn-on rate of the primary coil by slew-rate limiting using switching devices and a Miller-effect capacitor in order to reduce second... | 11/13/2007 |
| 7295043 | Differential output circuit for improving bandwidth A differential output circuit includes first and second inputs, first and second outputs, a resistor element connected between the outputs, first and second N-channel MISFETs, and first and second P-channel MISFETs. The inputs respectively receive first and second c... | 11/13/2007 |
| 7259568 | Arc fault detector An arc fault detector, as a stand alone device or in combination with a circuit interrupting device such as a ground fault interrupter (GFCI), protects from potentially dangerous arc fault conditions. The device utilizes a line side or load side series connected ind... | 08/21/2007 |
| 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 |
| 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 |
| 7245130 | Method and apparatus for diagnosing motor damping network integrity An apparatus for diagnosing motor damping network integrity, the motor damping network configured for selective short-circuiting of the windings of a motor in a motor control system. The apparatus includes a motor controller with a motor drive portion thereof electr... | 07/17/2007 |
| 7239168 | Current sensing in a two-phase motor A method and apparatus for measuring current by a single sensor for two motor phases driven by first and second set of switches to drive respective first and second phases of a motor under control of PWM signals. A first step 100 includes reading a duty cycle... | 07/03/2007 |
| 7231317 | Correlating power signatures with automated equipment A method and system for monitoring the activity of a system of one or more electro-mechanical components that receive electrical current from a power supply. The method and system samples an actual current supplied to the electro-mechanical component from the power ... | 06/12/2007 |
| 7227367 | Current transformer test device and method A current transformer test method implemented using a test device, is useful to verify proper CT installation and operation, and does not rely on the generator (or other system) to be in a state of relatively high assembly. The test device allows a current transform... | 06/05/2007 |
| 7215518 | Motor power supply line breaking detection method, motor control apparatus and electric power steering mechanism using the same and computer program thereof According to the breaking detection processing, it is determined that (A) iu of AC current (absolute value) supplied to a motor is less than 0.5 amperes or iv thereof is less 0.5 amperes or iw thereof is less than 0.5 amperes, (B) the angular velocity of the motor i... | 05/08/2007 |
| 7210360 | Apparatus for sensing position and/or torque An apparatus measures relative displacement between a first end and a second end of a shaft. The first and second ends being centered on a shaft axis. The apparatus includes first and second ferromagnetic plates. The first ferromagnetic plate has a first side and a ... | 05/01/2007 |
| 7208971 | Manual probe carriage system and method of using the same A probe support carriage for use during probing an electrical device includes a body, means for supporting and positioning the body, a plurality of flux sensors and a position sensor. The body has a first end and a second end. The plurality of flux sensors are opera... | 04/24/2007 |
| 7196884 | Apparatus and method for detecting the loss of a current transformer connection coupling a current differential relay to an element of a power system Disclosed is an apparatus and method for detecting a loss of a current transformer connection coupling a protective relay to a power system element of a three-phase power system and providing a plurality of secondary current waveforms of the three-phase power system... | 03/27/2007 |
| 7158864 | Interlock apparatus and method for supplying gas to a semiconductor manufacturing device A gas supplying apparatus for a semiconductor manufacturing device has an interlock apparatus that includes at least one solenoid valve that controls the gas supply from a gas source to the semiconductor manufacturing device, a main controller configured to ouput a ... | 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 |
| 7126368 | System and method for detecting motor coil-to-coil faults A system and method detects coil-to-coil faults in an electric motor having a plurality of coils. The method includes applying a square wave signal to a first coil of the motor, connecting a capacitor and a resistor between ground potential and a second coil of the ... | 10/24/2006 |
| 7126344 | Diagnostic device for an antenna A diagnostic device for an antenna includes a coil (20) or the like connected on the one hand to a reference potential and on the other hand to the output of an amplifier (12), including two condensers (C2, C3) mounted in series, a first ... | 10/24/2006 |
| 7119548 | Current transformer test device and method A current transformer test device and a method implemented using the test device, is useful to verify proper CT installation and operation, and does not rely on the generator (or other system) to be in a state of relatively high assembly. The test device allows a cu... | 10/10/2006 |
| 7109742 | Current sensing in a two-phase motor A method and apparatus for measuring current by a single sensor for two motor phases driven by first and second set of switches to drive respective first and second phases of a motor under control of PWM signals. A first step 100 includes reading a duty cycle... | 09/19/2006 |
| 7089806 | Device and method for measuring torque on an electric motor A device for measuring torque on an electric motor, which has a first motor portion and a second motor portion, which are rotatable in relation to each other, is proposed, the device comprising a rotatable holding plate for receiving the first motor portion, by mean... | 08/15/2006 |
| 7089808 | Torque sensor for vehicle steering system A torque sensor for a vehicle steering system includes a voltage boosting circuit, an oscillator, an offset voltage circuit part and a current amplifier. The torque sensor further includes a phase inversion part that outputs an offset voltage and a phase-inverted al... | 08/15/2006 |
| 7091724 | Model-based fault detection in a motor drive A method for detecting an open winding in a motor. The method employs passive monitoring of the voltage, current and speed of the motor. A residue voltage is calculated that equals the difference between an idealized set of voltage drops across the motor load elemen... | 08/15/2006 |
| 7084637 | Method for monitoring at least two electromagnetic valves of an internal combustion engine, especially an internal combustion engine of a motor vehicle in particular A device for monitoring at least two electromagnetic valves of an internal combustion engine in a motor vehicle. An actual current that is independent of the other valves may be supplied to each valve. A setpoint current is preselected for each valve. Measuring devi... | 08/01/2006 |
| 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 |
| 7051601 | Torque sensor for vehicle steering system A torque sensor for a vehicle steering system having a power source, an oscillator and an offset voltage circuit part includes a current amplifier, first and second coils that are in series and connected at both ends thereof to output terminals of said current ampli... | 05/30/2006 |
| 7053626 | Device and method for monitoring the connection of an electrical supply unit The invention relates to a device and a method for monitoring the connection of an electrical supply unit comprising voltage detection (32) detecting phase voltage (14), current detection (32) detecting phase voltages (38), a transformati... | 05/30/2006 |
| 7034547 | Method of diagnosing a fault on a transformer winding The present invention relates to a method of diagnosing a fault on a transformer winding by using frequency response analysis. The method comprises the steps of: measuring the impedance on said winding as a function of frequency, said measurement being represented i... | 04/25/2006 |
| 7010990 | Force detecting apparatus In a detecting apparatus, a resolver generates signals whose magnitudes vary periodically in accordance with a positional change of a fixed element side rotating shaft, which is a base for rotation of a rotator and whose position is offset when force of a component ... | 03/14/2006 |
| 6998846 | Ignition diagnosis using ionization signal The present feature of the invention is generally directed to a subsystem of an ignition diagnostics and feedback control system using ionization current feedback. It utilizes the ionization signal from an ionization detection circuit to monitor ignition parameters,... | 02/14/2006 |
| 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 |
