Having Movable Structure Or Winding Patents (Class 323/347)
  • Patent number: 9841524
    Abstract: A metal object detection device includes a plurality of detection coils, a capacitor configuring a resonant circuit in cooperation with each of at least two of the detection coils, a first series connection body, a second series connection body, a voltage applying unit, and a processing unit. The voltage applying unit applies an AC voltage to both ends of each of the first series connection body and the second series connection body. The processing unit performs a process for detecting the metal object on the basis of a potential difference between a connection point included in the first series connection body and a connection point included in the second series connection body.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: December 12, 2017
    Assignee: DENSO CORPORATION
    Inventors: Kazuyoshi Obayashi, Akira Kamiya, Eisuke Takahashi, Keisuke Tani
  • Patent number: 9473206
    Abstract: A power feeding unit includes: a power feeding electrode configured to be coupled through an electric field with a power receiving electrode of a power receiving unit; a power feeding section configured to feed the power receiving unit with power through the power feeding electrode; and a power feeding side communication section configured to communicate with the power receiving unit through the power feeding electrode.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: October 18, 2016
    Assignee: Sony Corporation
    Inventor: Takanori Washiro
  • Patent number: 8648587
    Abstract: The invention relates to the arrangement of a stepping switch on a control transformer, wherein either only the mechanical contact system (8) of the stepping switch or also its load changeover switch (7) is or are arranged within the tank (1) of the transformer, under the transformer cover (4) and above the iron yoke (3).
    Type: Grant
    Filed: May 8, 2010
    Date of Patent: February 11, 2014
    Assignee: Maschinenfabrik Reinhausen GmbH
    Inventors: Oliver Brueckl, Dieter Dohnal
  • Patent number: 7710097
    Abstract: There is provided a power supply for an electrical device operable in active mode and in standby mode. The power supply comprises a transformer having a primary winding on the primary side and a secondary winding on the secondary side. The primary winding is connectable to an AC voltage supply and is arranged to comprise N turns when the electrical device is in active mode and more than N turns when the electrical device is in standby mode. Circuitry on the secondary side is arranged to provide an output voltage for the electrical device during active mode.
    Type: Grant
    Filed: December 6, 2006
    Date of Patent: May 4, 2010
    Assignee: Creative Technology Ltd
    Inventors: Jun Makino, Boon Ghee Ting
  • Patent number: 6957351
    Abstract: An automated disk drive library has a rack with drawers that are interconnected with a host computer. A drive carrier having a disk drive is mounted in each drawer. The drive carrier has a front bezel that senses whether the disk drive is latched within the drawer and communicates with the computer. The front bezel also has an optical sensor that may be coupled to an optical probe as an auxiliary data interface with computer. The main data interface for the disk drive is provided by a self-healing optical coupler at the back of the carrier and drawer. Power to the disk drive is supplied via a magnetic coupling with split core transformers on the drive carrier and drawer. The disk drive and carrier may be manually or automatically installed into and removed from drawer via a drive mechanism in the drawer.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: October 18, 2005
    Assignee: International Business Machines Corporation
    Inventors: Robert George Emberty, Craig Anthony Klein
  • Patent number: 6343022
    Abstract: A semiconductor integrated circuit device for a non-contact type IC card equipped with a rectifying circuit rectifying a received signal and thus producing a power supply voltage is disclosed. A shunt regulator is connected between a power supply voltage and ground, and controls a shunt resistance. A control circuit controls the shunt regulator as follows. The shunt resistance gradually decreases when the power supply voltage becomes higher than an upper limit of a reference voltage range, and gradually increases when the power supply voltage becomes lower than a lower limit thereof. The shunt resistance remains constant when the power supply voltage falls within the reference voltage range.
    Type: Grant
    Filed: March 24, 2000
    Date of Patent: January 29, 2002
    Assignee: Fujitsu Limited
    Inventor: Tomomi Naruse
  • Patent number: 6177790
    Abstract: A redundant array of independent disk drives (RAID) is coupled to a backplane for interfacing with a computer. Each drive in the array is mounted in a carrier. The backplane has a main power circuit and each carrier has a power conditioning and distribution circuit. Each pair of power circuits interfaces via a connectorless magnetic coupling having a core transformer with two halves. Half of the split core transformer is contained within each of the backplane and the carrier. The main power circuits deliver power to the magnetically coupled split core transformer halves, which then deliver electrical power to their respective power conditioning and distribution circuits on the carriers to provide power to the drives.
    Type: Grant
    Filed: January 4, 2000
    Date of Patent: January 23, 2001
    Assignee: International Business Machines Corporation
    Inventors: Robert George Emberty, Craig Anthony Klein
  • Patent number: 5327030
    Abstract: A monolithic interface circuit for use with a linear variable differential transformer (LVDT) position transducer. The interface circuit includes a drive circuit for providing an excitation signal of selectable frequency and amplitude to the LVDT primary winding. The interface circuit further includes a decoder responsive to signals induced in the LVDT secondary windings for computing the position p of the LVDT core as a solution to the equation p=K(A-B)/(A+B), where A and B represent the signals induced in the primary winding and K is a constant scale factor. The decoder includes circuitry for rectifying and filtering the secondary signals, a charge balance loop responsive to the detected signals for providing a binary signal having a duty cycle representative of B/(A+B), and an output circuit responsive to the binary signal for providing the position output. The decoder provides excellent scale factor stability and linearity and is relatively insensitive to variations in primary drive amplitude.
    Type: Grant
    Filed: May 5, 1992
    Date of Patent: July 5, 1994
    Assignee: Analog Devices, Inc.
    Inventors: Lawrence M. DeVito, A. Paul Brokaw
  • Patent number: 5122729
    Abstract: A power supply device has a primary coil, a detection coil and a controller. The detection coil detects and outputs as a change in induction voltage any load fluctuation resulting from change in distance between the primary coil and a secondary coil. The controller controls, based on the change in the induction voltage output by the detection coil, an output of an oscillation circuit to hold power supplied to the secondary coil to a constant level. Therefore, even if the distance between the primary coil and the secondary coil changes, power supplied to battery connected to the secondary coil is stable. In particular, when the distance between the primary coil and the secondary coil becomes far, the controller increases the output of the oscillation circuit.
    Type: Grant
    Filed: January 2, 1991
    Date of Patent: June 16, 1992
    Assignees: Sharp Kabushiki Kaisha, Ueyama Corp.
    Inventors: Toshiyuki Itoga, Masataka Ueki
  • Patent number: 4924171
    Abstract: Between two units which are separately arranged, a power source signal is supplied from one of the two units to the other unit via electromagnetic induction coupling by using induction coils, and data signals are mutually transmitted and received between both of the units. A change in coupling distance between the induction coils provided for the two units is detected from a signal level of a reception signal from the unit which receives the power supply. When the reception signal level decreases, the signal level of the power supply signal is increased.
    Type: Grant
    Filed: October 7, 1988
    Date of Patent: May 8, 1990
    Assignee: Tokyo Keiki Co., Ltd.
    Inventors: Fujio Baba, Kunihiko Takeuchi, Shinichi Horinouchi
  • Patent number: 4904921
    Abstract: A monlithic interface circuit for use with a linear variable differential transformer (LVDT) position transducer. The interface circuit includes a drive circuit for providing an excitation signal of selectable frequency and amplitude to the LVDT primary winding. The interface circuit further includes a decoder responsive to signals induced in the LVDT secondary windings for computing the position p of the LVDT core as a solution to the equation p=K(A-B)/(A+B), where A and B represent the signals induced in the primary winding and K is a constant scale factor. The decoder includes circuitry for rectifying and filtering the secondary signals, a charge balance loop responsive to the detected signals for providing a binary signal having a duty cycle representative of B/(A+B), and an output circuit responsive to the binary signal for providing the position output. The decoder provides excellent scale factor stability and linearity and is relatively insensitive to variations in primary drive amplitude.
    Type: Grant
    Filed: November 13, 1987
    Date of Patent: February 27, 1990
    Assignee: Analog Devices, Inc.
    Inventors: Lawrence M. DeVito, A. Paul Brokaw
  • Patent number: 4857824
    Abstract: A two-wire linear transducer comprised of a high permeability finite length core that is positioned with respect to a continuously wound variable pitch coil. The cores is displaced from the initial stroke position at one end of the coil to the opposite end thereof to produce an output signal which varies with displacement. The coil is energized by a constant alternating current source and has a winding configuration that produces an alternating output voltage. The imaginary component of the alternating output voltage varies linearly and continously in amplitude in proportion to the movement of the ferrite core from its initial stroke position to its end stroke position.
    Type: Grant
    Filed: August 29, 1988
    Date of Patent: August 15, 1989
    Assignee: Cadillac Gage Textron Inc.
    Inventor: Sydney K. Tew
  • Patent number: 4847548
    Abstract: A signal conditioner for a linear variable differential transformer having a first amplifier which senses the differences in amplitude between secondary alternating current voltages in the two secondaries respectively, and a second amplifier which compares the phase of the difference signal from the first amplifier with the phase of one of the secondary alternating voltages. A conditioned signal A.sub.out is output by the signal conditioner according to the equation A.sub.out =K.sub.1 V.sub.s1 +K.sub.2 (V.sub.s1 -V.sub.s2) where K.sub.1 and K.sub.2 are constants, and V.sub.s1 and V.sub.s2 are instantaneous voltages across the respective secondaries.
    Type: Grant
    Filed: January 28, 1988
    Date of Patent: July 11, 1989
    Assignee: General Signal Corporation
    Inventor: Lawrence R. Lafler
  • Patent number: 4692681
    Abstract: A battery charger comprises a self-oscillating inverter with saturable transformer means in its positive feedback circuit. The saturation flux density of the magnetic material used in this saturable transformer means determines the frequency of inverter oscillation. A permanent magnet is rotatably mounted adjacent the saturable transformer means and is used by way of cross-magnetization to adjustably affect the saturation flux density of the magnetic material, thereby correspondingly to adjust the frequency of oscillation: the more cross-magnetizing flux provided to the magnetic material from the permanent magnet, the smaller the saturation flux density and the higher the frequency of oscillation.The battery charging current is attained from the inverter's squarewave voltage output by way of a series-excited parallel-loaded tuned L-C circuit, thereby providing for a battery charging current of magnitude dependent upon the frequency of inverter oscillation.
    Type: Grant
    Filed: April 21, 1986
    Date of Patent: September 8, 1987
    Inventor: Ole K. Nilssen
  • Patent number: 4629974
    Abstract: A current transformer equipped with a primary winding (1), a secondary winding (2), as well as a detector winding (3), has a rigid coupling between the secondary winding (2) and the detector winding (3). The coupling factor between these windings (2, 3) and the primary winding (1) is considerably smaller than one, since only one portion of the magnetic flux .phi..sub.1 created in the primary winding (1) by the current I.sub.1 to be measured is detected by the detector winding (3). This partial flux .phi..sub.13 is compensated by the flux which is created in the secondary winding (2) by means of a variable-gain amplifier.
    Type: Grant
    Filed: March 14, 1986
    Date of Patent: December 16, 1986
    Assignee: LGZ Landis & Gyr Zug AG
    Inventor: Richard Friedl
  • Patent number: 4507601
    Abstract: A manual controller for producing an output signal for control of hydraulic valves and the like. The controller has a quadrant lever consisting of an inner tube connected to a shaft and an outer tube slidable thereover. The inner tube has a palm rest at its upper end while the outer tube has an annular finger grip. The inner tube carries a slidable plug which is downwardly spring pressed and which is coupled to the outer tube to urge the finger grip downwardly away from the palm rest. A cam track is arranged on the frame closely parallel to the plane of swinging movement of the lever. The cam track is engaged by a cam follower which is secured to the outer tube.
    Type: Grant
    Filed: February 25, 1983
    Date of Patent: March 26, 1985
    Inventor: Herman J. Andresen
  • Patent number: 4453124
    Abstract: A linear inductive transducer includes a non-magnetic former which has a bore in which is slidable a core formed from magnetic material. The core in use is moved axially within the former by the component whose axial position it is required to sense. The former has three circumferential grooves in which are located coils connected together to form the transducer winding the inductance of which varies with the axial position of the core. The widths of the coils and the number of turns in each coil varies so as to produce a substantially linear variation of inductance as the core is moved. A temperature responsive resistor is mounted in close proximity to the winding and is connected in a resistance network which includes the winding. The inductance of the winding is checked by applying a step voltage to the resistance network and monitoring the change of current in a part of the network.
    Type: Grant
    Filed: July 6, 1982
    Date of Patent: June 5, 1984
    Assignee: Lucas Industries plc
    Inventors: John H. Francis, John P. Vernon, John H. Moore
  • Patent number: 4417200
    Abstract: A method and a device which are dependently and cojointly employed in the accurate control of the increase and decrease of alternating current, direct current, and concomitant electrical current extending through circuitry and passing to and through electrical devices, electrical appliances, electrical equipment, electrical motors, and electrical apparatuses which are connected to the innovative device.
    Type: Grant
    Filed: March 26, 1980
    Date of Patent: November 22, 1983
    Assignee: Herman Rosman
    Inventors: Morton Weintraub, Elliot Waxman, Bernard Gendelman
  • Patent number: 4282485
    Abstract: A linear variable phase transformer position to phase transducer produces a linear phase change in an output signal with respect to displacement. Moreover, the magnitude of such output signal remains relatively constant while such displacement occurs. The transducer includes two primaries which are specially wound according to sine and cosine functions and are excited out of phase, a secondary, and a core that combines the primary signals and induces the output signal in the secondary according to the core position relative to the primaries.
    Type: Grant
    Filed: May 22, 1978
    Date of Patent: August 4, 1981
    Assignee: Pneumo Corporation
    Inventors: Michael A. Pauwels, Dan O. Bauer