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| Number | Title | Issue Date |
| 7436120 | Compensation of magnetic fields For compensation of a magnetic field in an operating region a number of magnetic field sensors (S1, S2) and an arrangement of compensation coils (Hh) surrounding said operating region is used. The magnetic field is measured by at least two sensors (S | 10/14/2008 |
| 7415971 | Control circuit for an actuator In a control circuit for at least one actuator, in particular for a capacitive actuator of an injection system of an internal combustion engine, a control current can be applied to the actuator. The control circuit has an inductor, e.g., having a core and hav... | 08/26/2008 |
| 7222111 | Multi-utility energy control and facility automation system with dashboard having a plurality of interface gateways A multi-utility energy and facility automation control system has control center computer(s) connected to utility consuming systems and software that formats energy data, stores, retrieves, diagnoses and acts in response to changes and includes a multi-utility maste... | 05/22/2007 |
| 7132829 | NMR RF coils with improved low-frequency efficiency According to one aspect, the low-frequency (e.g. lock channel) performance of a nuclear magnetic resonance (NMR) saddle-shaped, distributed-capacitance radio-frequency (RF) coil is improved by connecting a pair of auxiliary inductors across a plurality of leads exte... | 11/07/2006 |
| 7126805 | Solenoid driving device A device for driving a solenoid including a power supply, a switching element connected between the power supply and the solenoid in series therewith, a current circulating diode connected in parallel to the solenoid, a current detecting circuit for detecting an act... | 10/24/2006 |
| 7113384 | Dynamic degaussing system A dynamic degaussing system includes a magnetic field sensor for generating a sensor signal in response to a sensed magnetic field. The magnetic sensor is coupled to a controller that produces an output signal based on the sensor signal. The controller may include f... | 09/26/2006 |
| 7061741 | Method for magnetic field reduction using the decoupling effects of multiple coil systems A method for reducing the magnetic field level in the vicinity of two or more connected reactors wherein each reactor is a magnetic dipole and wound so that currents flow in opposite directions and resulting in magnetic fluxes opposing each other. ... | 06/13/2006 |
| 7013832 | Arrangement for damping of structural resonance A hull (11) has mounted thereon a number of accelerometers (20) arranged to provide a data signal corresponding to movement or vibration of the hull (11) to which each is fixed. The hull (11) and/or a thrust block (18) has mounted ... | 03/21/2006 |
| 6968859 | Electromagnetic operating device Disclosed is a solenoid type electromagnetic operating device which needs a relatively large current only for a limited short period at an excitation start initial stage and is adapted to achieve the speeding up at an excitation start stage and an improvement in res... | 11/29/2005 |
| 6953108 | Magnetorheological damper system A magnetorheological damper system comprising a reservoir in communication with a damper. The damper comprises a damper cylinder defining a damper chamber, wherein the damper chamber contains a magnetorheological fluid and a movable damper piston. The damper piston ... | 10/11/2005 |
| 6904385 | Multi-utility energy control system with internet energy platform having diverse energy-related engines A multi-utility energy control system has control center computer(s) connected to various utility consuming systems and software that formats pertinent systems' energy data, stores, retrieves, diagnoses and acts in response to changes and includes a multi-utility ma... | 06/07/2005 |
| 6688264 | Method of piloting electromagnetic actuators for the control of a plurality of valves of an engine Method for piloting electromagnetic actuators for the control of the valves of an engine; each electromagnetic actuator is provided with at least one respective electromagnet, which is piloted by a common piloting device by means of the supply of an elect... | 02/10/2004 |
| 6687111 | Electromagnetic mark device for a magnetism encoder An electromagnetic mark device for any type of magnetism encoder applies the electric current magnetic field as the electromagnetic mark thereof. The electromagnetic mark device comprises an insulated base plate and a thin lead wire. The thin lead wire is... | 02/03/2004 |
| 6661636 | Method for controlling an electromechanical actuator drive So that an actuator drive which holds an actuator element for actuating, for example, a charge cycle valve of an internal combustion engine, in a limit position by a coil, can be switched at the correct time into the other limit position, the energization... | 12/09/2003 |
| 6603994 | Apparatus and method for internally inducing a magnetic field in an aneurysm to embolize aneurysm with magnetically-controllable substance The present invention involves a magnetic embolization apparatus for embolizing an aneurysm of a blood vessel. The apparatus includes a coiled element adapted for insertion within an aneurysm of a blood vessel, the coiled element shaped to be retained wit... | 08/05/2003 |
| 6603307 | Magnetic flux detector with resistance of its potential setup resistor set larger than that of its search coil A magnetic flux detector comprises a core member 12 and an armature member 11, and the core member 12 generates a magnetic flux by an exciting coil 13 when the exciting coil receives an excitation current controlled by an excitation current controller 30.... | 08/05/2003 |
| 6522517 | Method and apparatus for controlling the magnetization of current transformers and other magnetic bodies A varying voltage is applied to a conductive winding (61) that magnetically interacts with a magnetic body (60). The varying voltage causes the voltage induced in the winding to have such waveform and magnitude that the integral over time of the induced v... | 02/18/2003 |
| 6510035 | Coil driving method, coil driving apparatus and MRI apparatus With the objective of preventing variations in sensitivity even if samples to be inserted between an upper coil and a lower coil opposite to each other are different in body frame, a pre-scan is effected on a sample in a state in which the sample is place... | 01/21/2003 |
| 6462927 | Apparatus and method for spatially coupling an electro-magnet to a support armature An electro-magnet (11) is spatially coupled with respect to a support armature (15) by an operational gap (16) and their relative movement is automatically compensated by controlling a current (14) supplied to the electromagnet (11). The current (14) and ... | 10/08/2002 |
| 6438250 | Method for making a conductor, or electric circuit balanced in radioelectric interference such as micro-discharge and corresponding conductor or circuit The invention relates to a manufacturing process of an electrical conductor or circuit compensated for radio interferences, including those from the electrical circuit itself. An application of a semi-conductor material (2) of resistivity coefficient allo... | 08/20/2002 |
| 6418003 | Control methods for electromagnetic valve actuators A method for initializing an actuator valve (12) and controlling the valve (12) using current command control (100) or voltage control including an estimate of back emf (200). A series of low voltage pulses (304) is applied to one of the solenoid coils (2... | 07/09/2002 |
| 6170506 | Method and circuit for actively cleaning electrohydraulic valves in a hydraulic control valve circuit A method for cleaning a solenoid-operated regulator valve wherein command current applied to a solenoid actuator establishes a defined response of a valve. Cleaning current pulses applied to the solenoid establish a response that does not interfere with t... | 01/09/2001 |
| 6160697 | Method and apparatus for magnetizing and demagnetizing current transformers and magnetic bodies A method and apparatus for establishing and maintaining a preferred induction level in a magnetic body. A varying voltage is applied to a conductive winding (61) that magnetically interacts with a magnetic body (60). The voltage is controlled during a fir... | 12/12/2000 |
| 5952734 | Apparatus and method for magnetic systems A coil for bucking out undesired ambient time varying magnetic fields in the region of the gap in an MRI magnet structure is energized by a servo loop controlled by a Flux Lock Circuit having, in turn, a closed loop circuit controlled by a magnetic sensor... | 09/14/1999 |
| 5951616 | Current control system for linear solenoid A current control system for a linear solenoid for feedback-controlling an output voltage value on the basis of a difference between a command current value to the linear solenoid, as set according to a vehicle running state, and a feedback current value,... | 09/14/1999 |
| 5793598 | Magnetically levitated vibration damping apparatus A magnetically levitated vibration damping apparatus includes a table having a flat board of a magnetic material, an electromagnetic actuator for applying magnetic attractive forces to the flat board to levitate the table, a displacement sensor for detect... | 08/11/1998 |
| 5654864 | Control method for magnetic stereotaxis system A control method permits the operation of multiple superconducting magnetic coils so as to move a magnetic object to precisely specified locations within the body under command of a physician-operator observing the motion with live fluoroscopic imaging fu... | 08/05/1997 |
| 5602711 | Apparatus for monitoring inductance An apparatus for monitoring the inductance of a coil (L1) which is not part of a resonant circuit including a second coil (L2) connected in series with the first mentioned coil and a resonant circuit which is formed by connection of a capacitor (C5) to th... | 02/11/1997 |
| 5586064 | Active magnetic field compensation system using a single filter The present invention provides a magnetic compensation system and a method of utilizing a magnetic compensation system to neutralize magnetic fields in an environment of a magnetically sensitive instrument. A magnetometer is used to sense magnetic field c... | 12/17/1996 |
| 5530306 | Magnetic bearing apparatus In a magnetic bearing apparatus, a rotating member having an axis of rotation along the horizontal direction is supported by a pair of radial magnetic bearings each including a plurality of electromagnets in the radial direction with clearances with the r... | 06/25/1996 |
| 5512821 | Method and apparatus for magnetically detecting defects in an object with compensation for magnetic field shift by means of a compensating coil A magnetic detector includes a magnetizer generating a magnetic field; a first magnetic sensor for detecting a leakage flux resulting from a magnetically defective portion of an object moving in and relative to the magnetic field; a low-pass filter for ex... | 04/30/1996 |
| 5467243 | Electromagnet control system Alternating current provided at an angular frequency (ω) for powering an electromagnet force actuator having a leakage inductance (L1) whereby the alternating current is controlled by a voltage reference and a feedback signal indicative of the... | 11/14/1995 |
| 5449975 | Method and arrangement for reducing electrical alternating fields generated in the surroundings of a display unit The invention relates to a method and arrangement for reducing to a minimum the electrical alternating fields generated in the surroundings of a visual display unit (1). The visual display unit includes a voltage connected part (5), on which undesirable v... | 09/12/1995 |
| 5420741 | Passive tuned magnetic flux rate feedback sensing and control arrangement An arrangement for obtaining flux rate information in a magnetic: circuit including passive means connected across a flux rate sensor for implementing control of said flux rate. The passive means being a tuned magnetic flux rate feedback sensing and contr... | 05/30/1995 |
| 5394290 | Active tuned magnetic flux rate feedback sensing arrangement An arrangement using sensing coils for obtaining flux rate of change information in a magnetic circuit. The arrangement can be used for vibration attenuation in a magnetic forcer system. Active (electric powered) circuitry is used to implement closed loop... | 02/28/1995 |
| 5359490 | Method of controlling moving element of magnetic levitation and transport system A magnetic levitation and transport system has a plate-like moving element (SFT) which is moved by a linear motor disposed in a stator (STT). The moving element is moved vertically by first through fourth electromagnetic devices (MGV10 -MGV | 10/25/1994 |
| 5329416 | Active broadband magnetic flux rate feedback sensing arrangement An arrangement using sensing coils for obtaining flux rate of change information in a magnetic circuit. The arrangement can be used for vibration attenuation in a magnetic forcer system. Active (electric powered) circuitry is used to implement closed loop... | 07/12/1994 |
| 5257158 | Apparatus for magnetizing and demagnetizing a tool Apparatus for selectively magnetizing and demagnetizing a small tool, such as a screwdriver, by providing an enclosure having a first opening to receive a tool for magnetizing a desired portion of the tool, and a second opening to receive a tool for demag... | 10/26/1993 |
| 5243491 | Electromagnetic support with current-independent characteristics A device for positioning a body (5) by means of at least two electromagnets (13, 15). A position sensor (29) measures the size of an air gap (23) between one of the electromagnets (13, 15) and a guide beam (1). An output signal of the position sensor (29)... | 09/07/1993 |
| 5231332 | AC electric field emission suppression in CRT image displays An AC electric field emission suppressor for use in a CRT imaging system cancels the ripple voltage on the ultor voltage that generates the undesired emission. Ripple-cancelling pulses are derived from the horizontal deflection circuit and are capacitivel... | 07/27/1993 |
