Magnetic Or Electrostatic Field Control (e.g., Shielding) Patents (Class 307/91)
  • Patent number: 6700223
    Abstract: An active booster transformer system with a booster transformer core (S, 10, 17) of the type which is applied around an electrical cable (K, 1, 13) for reducing stray currents and in which the booster transformer core is a body built up of a magnetizable material provided with a continuous channel intended to accommodate the cable. The system includes a current sensor (G, 2-3, 14-15) which senses the net current in the cable (K, 1, 13), an amplifier unit (F, 4-7), the input signal of which is controlled by the current (Iv) sensed by the current sensor, and a magnetizing winding (L, 3, 15) situated on the booster transformer core (S, 10, 17). The output of the amplifier unit is arranged to drive the magnetizing winding and to create a magnetic flow in the booster transformer core, the flow, in turn, inducing a longitudinal voltage in the cable which counteracts the stray current.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: March 2, 2004
    Assignee: EnviroMentor AB
    Inventors: Bengt Johansson, Yngve Hamnerius
  • Patent number: 6661120
    Abstract: An article for deflecting electromagntic fields consisting of a conductive meshed dry frbric with conductive filaments parallel to one another, bordered by a conductive fabric having a grid of filments arranged in criss-cross fashion. Connected to the fabric is an electric circuit designed to dissapate, by the Joule effect, the electromagnetic signal coming from the article.
    Type: Grant
    Filed: November 27, 2001
    Date of Patent: December 9, 2003
    Inventor: Edilio Livio Alpini
  • Patent number: 6636411
    Abstract: A small quantity of electron attaching gas is introduced into the corona region of an electrical ionizer to stabilize the corona in the otherwise electron non-attaching nitrogen gas. The corona region is closely localized at emitter points so the quantity of electron attaching gas is very small. Clean-dry-air is preferably used as the purge gas but other gases such as oxygen and carbon dioxide may be used. The small quantity of electron attaching gas may be introduced either through a hollow needle emitter or an external purge gas (sleeve about the needle, or by using a gas purge nozzle).
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: October 21, 2003
    Assignee: Illinois Toolworks, Inc.
    Inventor: Charles G. Noll
  • Patent number: 6624536
    Abstract: An electronic apparatus is comprised of a circuit apparatus; and an electromagnetic wave absorbing device arranged in the vicinity of the circuit apparatus in an insulating manner with respect to a circuit of the circuit apparatus, and having a metal loop, a portion of which is made of a high resistor. The metal loop contains a first member having a resistor having a resistance value smaller than, or equal to several ohms; and a second member having a resistor having a resistance value larger than, or equal to several ohms, and connected so as to form an electric loop in combination with the first member.
    Type: Grant
    Filed: July 27, 1999
    Date of Patent: September 23, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Hideo Sawada, Hiromu Ishihara, Hitoshi Yokota, Takashi Suga, Tsutomu Hara
  • Patent number: 6600243
    Abstract: The objective of the present invention is to provide an information processing device that is operable by a battery and which suppresses the generation of standing waves and has little radiation noise. In the information processing device of the present invention having means for connecting to a battery pack that stores a battery for supplying power to the information processing device, there is one or more capacitive element (for example, a capacitor) in the proximity of the terminals of the positive and negative poles of the battery when the battery pack is connected to the information processing device, and it is possible for at least the terminal of the positive pole of the battery or the terminal of the negative pole of the battery to be connected electrically to the ground of the information processing device by way of this capacitive element.
    Type: Grant
    Filed: January 28, 2000
    Date of Patent: July 29, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Tsutomu Hara, Mariko Kasai, Hitoshi Yokota, Giichirou Yokokura, Nobuhiro Kato, Tatsuhiko Matsuoka
  • Patent number: 6580183
    Abstract: A measuring circuit capable of performing a high-accuracy measurement by eliminating inductive influence from an ambient noise voltage source. An electric circuit including a signal circuit of high impedance, a wiring conductor and a meter is provided with a shielding resistance member having a significantly lower resistance than that of the signal circuit in dependence on an inter-terminal voltage of the high impedance signal circuit and a shield formed of an electrically conductive material disposed in association with the wiring conductor. A voltage distribution function of the shielding resistance member is matched equally to that of an inter-terminal voltage distribution function of the signal circuit. By measuring a line voltage through the medium of the high impedance signal circuit shielded by the shielding resistor, high accuracy measurement can be realized without undergoing adverse influences of parasitic capacitance and induction.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: June 17, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Masahiro Watanabe, Kazuo Kato
  • Patent number: 6578089
    Abstract: A secure switch for connecting a plurality of computer systems to a single monitor and keyboard is disclosed. The system provides a first coupling section for coupling to a first monitor, a second coupling section for coupling to a second monitor, the first coupling section electrically and electromagnetically isolated from the second coupling section. A switching section isolated from each of the coupling sections.
    Type: Grant
    Filed: April 19, 1999
    Date of Patent: June 10, 2003
    Assignee: Emcon Emanation Control Ltd.
    Inventors: John P. Simpson, Michael H. Wong, Frank O. Blasioli
  • Patent number: 6570271
    Abstract: An apparatus for routing signals to and from at least one circuit component that has a plurality of input/output leads includes a support structure having a first side and a second side. The first side is adapted to have the input/output leads of the circuit component attached thereto. A signal routing strip having a first end and a second end is also included. The first end of the routing strip is configured and adapted to be electrically connected to the input/output leads of the circuit component for transmitting signals to and from the circuit component.
    Type: Grant
    Filed: May 16, 2001
    Date of Patent: May 27, 2003
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: James P. Slupe, Timothy V. Harper, Fred R. Wiedeback
  • Publication number: 20030080628
    Abstract: A measuring circuit capable of performing a high-accuracy measurement by eliminating inductive influence from an ambient noise voltage source. An electric circuit including a signal circuit of high impedance, a wiring conductor and a meter is provided with a shielding resistance member having a significantly lower resistance than that of the signal circuit in dependence on an inter-terminal voltage of the high impedance signal circuit and a shield formed of an electrically conductive material disposed in association with the wiring conductor. A voltage distribution function of the shielding resistance member is matched equally to that of an inter-terminal voltage distribution function of the signal circuit. By measuring a line voltage through the medium of the high impedance signal circuit shielded by the shielding resistor, high accuracy measurement can be realized without undergoing adverse influences of parasitic capacitance and induction.
    Type: Application
    Filed: July 10, 2002
    Publication date: May 1, 2003
    Applicant: Hitachi, Ltd.
    Inventors: Masahiro Watanabe, Kazuo Kato
  • Publication number: 20030080627
    Abstract: A measuring circuit capable of performing a high-accuracy measurement by eliminating inductive influence from an ambient noise voltage source. An electric circuit including a signal circuit of high impedance, a wiring conductor and a meter is provided with a shielding resistance member having a significantly lower resistance than that of the signal circuit in dependence on an inter-terminal voltage of the high impedance signal circuit and a shield formed of an electrically conductive material disposed in association with the wiring conductor. A voltage distribution function of the shielding resistance member is matched equally to that of an inter-terminal voltage distribution function of the signal circuit. By measuring a line voltage through the medium of the high impedance signal circuit shielded by the shielding resistor, high accuracy measurement can be realized without undergoing adverse influences of parasitic capacitance and induction.
    Type: Application
    Filed: March 20, 2002
    Publication date: May 1, 2003
    Inventors: Masahiro Watanabe, Kazuo Kato
  • Patent number: 6525436
    Abstract: An improved electronic device, for example, an upconverter for converting an IF television signal to a VHF or UHF television signal at a broadcast signal headend provides an external, shielded bus interface which connects to filtered internal input and output lines leading to control circuitry. The resulting device suppresses unwanted electromagnetic emissions.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: February 25, 2003
    Assignee: General Instruments Corp.
    Inventor: Donald E. Groff
  • Patent number: 6521140
    Abstract: In a composite magnetic body comprising flat soft magnetic powder dispersed in an organic binding agent, biodegradable plastic is used as the organic binding agent so that the composite magnetic body is free of possibility of pollution due to disposal thereof. As the biodegradable plastic, any of a microbe-generated type, a chemically-synthesized type and a natural high molecular weight type is used.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: February 18, 2003
    Assignee: NEC Tokin Corp.
    Inventors: Shigeyoshi Yoshida, Norihiko Ono
  • Patent number: 6515380
    Abstract: An improved electronic device, for example, an upconverter for converting an IF television signal to a VHF or UHF television signal at a broadcast signal headend provides an external, shielded bus interface which connects to filtered internal input and output lines leading to control circuitry. The resulting device suppresses unwanted electromagnetic emissions.
    Type: Grant
    Filed: March 10, 1999
    Date of Patent: February 4, 2003
    Assignee: General Instrument Corp.
    Inventor: Donald E. Groff
  • Patent number: 6492746
    Abstract: The invention relates to a device which can compensate, at origin, the magnetic field perturbations in the surroundings of an electrically-driven train track caused by variations in the current of the power supply catenary. The object of the system is to create a return circuit with a geometry which varies with the position of the train, causing the suppression at origin of the field produced by the catenary-train-track circuit and thus reducing perturbations of the magnetic field in the surroundings. The system relies on shunting the return current from the track divided in to elementary segments insulated from each other, to a return conductor placed near the catenary and parallel to it, using a series of vertical conductors which connect each segment to said return conductor.
    Type: Grant
    Filed: December 11, 2000
    Date of Patent: December 10, 2002
    Assignee: Universidad Complutense de Madrid
    Inventors: Antonio Hernando Grande, Guillermo Rivero Rodriguez, Fernando Briones Fernandez Pola, Pilar Marin Palacios
  • Publication number: 20020167828
    Abstract: A DC bus for use in a power module has a positive DC conductor bus plate parallel with a negative DC conductor bus plate. One or more positive leads are connected to the positive bus and are connectable to a positive terminal of a power source. One or more negative leads are connected to the negative bus and are connectable to a negative terminal of a power source. The DC bus has one or more positive connections fastenable from the positive bus to the high side of a power module. The DC bus also has one or more negative connections fastenable from the negative bus to the low side of the power module. The positive bus and negative bus permit counter-flow of currents, thereby canceling magnetic fields and their associated inductances, and the positive and negative bus are connectable to the center portion of a power module.
    Type: Application
    Filed: March 27, 2002
    Publication date: November 14, 2002
    Applicant: Ballard Power Systems Corporation
    Inventors: Scott Parkhill, Sayeed Ahmed, Fred Flett
  • Patent number: 6462436
    Abstract: An economical protective shield assembly of a dielectric substrate and an EMI shield, substantially free of the effects of board coupling and air coupling which requires less hardware for securing an EMI shield than present devices and methods, is provided for. The inventions use of simply finished shield edges with an unimproved substrate having a conductive intermediary interconnected with a grounding path and simply finished or unfinished shield edges with an improved substrate having a mating groove cooperatively adapted to fit the shield edge, interacts to exclude EMI signals and requires less precision in positioning the shield onto the substrate. The invention also provides a simplified method to exclude EMI effects for an assembly by a process of fabrication requiring less finishing steps than present processes.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: October 8, 2002
    Assignee: Avaya Technology Corp.
    Inventors: Jason A. Kay, David Stevens Kerr, John Robert Morris, Jr., Ivan Pawlenko, Richard Franklin Schwartz
  • Publication number: 20020135236
    Abstract: A non-optical isolator having a driver circuit for providing an input signal to one or more first passive components which are coupled across a galvanic isolation barrier to one or more corresponding second passive components, and an output circuit that converts the signal from the second passive components to an output signal corresponding to the input signal. The entire structure may be formed monolithically as an integrated circuit on one or two die substrates, for low cost, small size, and low power consumption. The passive components may be coils or capacitor plates, for example. When the first and second passive components are capacitor plates, a Faraday shield may be provided between them, with the first and second passive components being referenced to separate grounds and the Faraday shield referenced to the same ground as the second passive components.
    Type: Application
    Filed: April 19, 2001
    Publication date: September 26, 2002
    Inventors: Geoffrey T. Haigh, Baoxing Chen
  • Patent number: 6410996
    Abstract: A radioshielded assembly contains components that require a d.c. supply and a multi-pole terminal arrangement connected between power supply terminals of the components and an external d.c. supply. At least one pole of the multi-pole terminal arrangement is fashioned for conducting a potential that differs from a reference potential. A switching stage is inserted between that pole of the terminal means that does not carry reference potential and the corresponding power supply terminals of the components. An actuation arrangement is in interactive communication with the switching stage, as a result of which the connected pole can be electrically connected to the power supply terminals or the pole can be disconnected from the power supply terminals and electrically connected to a reference potential so that interference signals cannot reach the components via the power supply lines.
    Type: Grant
    Filed: May 1, 1996
    Date of Patent: June 25, 2002
    Assignee: Siemens Aktiengesellschaft
    Inventor: Rainer Kuth
  • Patent number: 6400044
    Abstract: The invention relates to an arrangement for the protection of electronic functional units and/or functional groups from disturbance quantities. The invention is characterized in that a division of the functional units and/or groups into partial units and/or groups with different sensitivity to the disturbance quantities is provided, in that a different screening from the disturbance quantities is assigned to the partial units and/or groups with different sensitivity to the disturbance quantities, and in that at least two of the screenings complete each other to a screening with a greater efficiency degree or factor, respectively.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: June 4, 2002
    Assignee: Continental Teves AG & Co., OHG
    Inventors: Peter Lohberg, Roland Burghardt, Klaus Rink
  • Patent number: 6376933
    Abstract: Signal isolator circuits using one or more magneto-resistive sensors are disclosed. In a first embodiment, a magneto-resistive sensor is used to sense an input magnetic field. A feedback circuit senses the output signal from the sensor, and applies a current to an output coil that substantially null out the input magnetic field at the magneto-resistive sensor. In another embodiment, the input signal is provided to a first magneto-resistive bridge sensor and an offset input signal is provided to a second magneto-resistive bridge sensor. Changes in sensitivity of the bridge sensors can be detected by comparing the output signal signals from the sensors. The excitation voltage that is applied to the sensors is then adjusted to compensate for any changes in sensitivity. It is contemplated that a single magneto-resistive bridge sensor may be used to effectively perform both measurements of the first and second magneto-resistive bridge sensors.
    Type: Grant
    Filed: December 31, 1999
    Date of Patent: April 23, 2002
    Assignee: Honeywell International Inc.
    Inventors: Jay R. Goetz, Hong Wan
  • Patent number: 6369464
    Abstract: An actively shielded, superconducting magnet arrangement for the generation of a magnetic field in the direction of a z axis in a working volume arranged about z=0, having a radially inner and a radially outer coaxial coil system, wherein the two coil systems carry the same current and have dipole moments of the same magnitude, but of opposite directions, wherein parts of the radially outer coil system (C2′) are electrically connected in series with the radially inner coil system (C1) and wherein a first superconducting switch (S1) is provided via which during operation a superconducting short circuit of a first current path of the magnet arrangement can be effected, is characterized in that a section (A′) of the radially outer coil system (C2′), which can be superconductingly short-circuited during operation via a further superconducting switch (S2) is arranged symmetrically to the plane z=0 and that the further superconducting current path formed by the superconductingly shor
    Type: Grant
    Filed: July 2, 1999
    Date of Patent: April 9, 2002
    Assignee: Bruker AG
    Inventors: Robert Schauwecker, Pierre-Alain Bovier, Daniel M. Eckert, Michael Westphal
  • Patent number: 6342830
    Abstract: A system that identifies multiple electronic tags includes a plurality of electronic tags attachable to a single object, each electronic tag having a non-overlapping readable region, and each electronic tag having a unique identifier. One or more electronic tag readers are configured to read the unique identifier of each electronic tag within the non-overlapping readable region. A computing system is connected to the electronic tag reader to provide digital services in response to reading the unique identifier of each electronic tag. In certain embodiments, the electronic tags can have integral sensor systems that detect, for example, light, location, acceleration, or other physical properties, allowing provision of particular digital services related to the sensed properties.
    Type: Grant
    Filed: September 10, 1998
    Date of Patent: January 29, 2002
    Assignee: Xerox Corporation
    Inventors: Roy Want, Kenneth P. Fishkin, Anuj Uday Gujar, Beverly L. Harrison, Wesley R. Irish
  • Patent number: 6323564
    Abstract: A circuit configuration with reduced EMC radiation in a motor vehicle includes a semiconductor switch with a load section which is connected, on one hand, through a first supply line to a positive battery terminal and, on the other hand, through a second supply line to a load and a freewheeling diode. A device for pulse-width modulation controls the semiconductor switch. The semiconductor switch and the freewheeling diode are disposed as close as possible to the battery terminal, so that supply leads from the battery to the semiconductor switch and the freewheeling diode are shortened.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: November 27, 2001
    Assignee: Siemens Aktiengesellschaft
    Inventor: Alfons Graf
  • Patent number: 6297965
    Abstract: Disclosed herein is a printed circuit board comprising a ground layer and a signal layer in which the characteristic impedance of a specific source line is made to be not less than three times as large as the impedance at an upper limit frequency at which the electromagnetic wave radiation of a specific capacitor may occur. In this printed circuit board, variation of a power source voltage and unnecessary electromagnetic wave radiation can be suppressed.
    Type: Grant
    Filed: June 28, 1999
    Date of Patent: October 2, 2001
    Assignee: NEC Corporation
    Inventors: Hideki Sasaki, Takashi Harada
  • Patent number: 6291907
    Abstract: An isolator having a driver circuit which responsive to an input signal drives appropriate signals into one or more coils which are magnetically coupled to one or more corresponding MR or GMR elements whose resistance is variable in response to the magnetic field applied by the coil(s), and an output circuit that converts the resistance changes to an output signal corresponding to the input signal. A Faraday shield is interposed between the coil(s) and the MR or GMR elements. Common mode transients applied to the driver are capacitively coupled from the coil(s) into the Faraday shield and therethrough to ground, instead of into the MR elements. A second Faraday shield may be disposed in spaced relationship with the first Faraday shield and referenced to the potential of the MR elements for even greater common mode rejection. The entire structure may be formed monolithically as an integrated circuit on a single substrate, for low cost, small size, and low power consumption.
    Type: Grant
    Filed: April 25, 2000
    Date of Patent: September 18, 2001
    Assignee: Analog Devices, Inc.
    Inventors: Geoffrey T. Haigh, Paul R. Nickson
  • Patent number: 6274951
    Abstract: An EMI energy absorber for use with an electrical circuit, such as a hot wire air flow sensor, which has at least one electrical element which exhibits antenna characteristics at a predetermined frequency range for the EMI. The energy absorber includes a component, such as a ferrite bead, which is electrically connected in series with the element of the electrical circuit. This component exhibits a resistance which varies as a function of frequency and has a maximum resistance within the predetermined frequency range. Thus, the component functions to absorb the EMI and dissipate the EMI as heat.
    Type: Grant
    Filed: May 5, 1999
    Date of Patent: August 14, 2001
    Assignee: Hitachi America, Ltd.
    Inventors: George Saikalis, Shigeru Oho
  • Patent number: 6271603
    Abstract: In a frequency conversion apparatus, a first frequency conversion section is disposed in a first accommodating site, a second frequency conversion section is disposed in a second accommodating site, two shield plates are interposed between the first accommodating site and the second accommodating site, a first partitioned chamber is formed in the region surrounded by the shield plates, a first power supply line is disposed in the first partitioned chamber. Power is directly supplied from the first power supply line to the first frequency conversion section and the second frequency conversion section. With this arrangement, interference caused by the existence of two local oscillators is reduced without increasing the size of metal cases.
    Type: Grant
    Filed: July 8, 1999
    Date of Patent: August 7, 2001
    Assignee: Alps Electric Co., Ltd.
    Inventor: Kazutoyo Kajita
  • Patent number: 6255581
    Abstract: A surface mount technology compatible electromagnetic interference (EMI) gasket assembly includes an electrically conductive gasket material, a solderable electrically conductive support layer, and an adhesive or other mechanical assembly for affixing the electrically conductive gasket material to the support layer.
    Type: Grant
    Filed: March 31, 1998
    Date of Patent: July 3, 2001
    Assignee: Gore Enterprise Holdings, Inc.
    Inventors: Bradley E. Reis, David R. King
  • Patent number: 6252313
    Abstract: An apparatus and method for minimizing electromagnetic interference in a microcomputing system. The apparatus and method of the present invention are based on the fundamental aspect of providing an EMI shield specifically dimensioned to receive a microprocessor within the microcomputing system. The apparatus and method of the present invention are further based on the aspect of providing at least one ferrite bead along a power delivery path to attenuate any high-frequency leakage current from the microprocessor that results at the resonant frequencies of the EMI shield.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: June 26, 2001
    Assignee: Intel Corporation
    Inventors: Michael T. Zhang, Don Weiss, James Webb, Steve Lofland
  • Patent number: 6219218
    Abstract: An electromagnetic flux suppression includes a three stage filtering system to protect against electromagnetic interference and electrostatic discharge and has a first stage high voltage section that filters a high voltage pulse by providing a spark gap to ionize the ambient air and thus effectively form a shunt. A second stage filter has a front end capacitive interface followed by an inductive line to filter out radio frequency arcing that occurs between two bodies thus exposing them to radio frequency radiation. A third stage filter includes a radio frequency low pass filter to reinforce the capacitive inductance filter.
    Type: Grant
    Filed: January 31, 1997
    Date of Patent: April 17, 2001
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: John A. Nial, Jr., J. David De Leon, Nickolas Kaloterakis, T. William Ammons, Jr., Joseph Dulcey
  • Patent number: 6210597
    Abstract: Since the radio wave absorbent of the present invention has the main component of a magnesium-zinc system ferrite material containing 45 to 50 mol % of iron oxide, 7 to 19.7 mol % of magnesium oxide, 24 to 28.5 mol % of zinc oxide, 4 to 16 mol % of copper oxide, and 0.1 to 6 mol % of manganese oxide, a matching thickness is less than 8 mm, and the total weight of the radio wave absorbent for use in the inner wall of a radio wave dark room or the outer wall of a building or the like is remarkably reduced as compared with the radio wave absorbent obtained by sintering the conventional magnesium-zinc system ferrite material. Moreover, since the radio wave absorbent can be obtained by sintering the material at a relatively low sintering temperature of about 950 to 1150° C., the manufacture cost can be reduced relative to the radio wave absorbent obtained by sintering the conventional nickel-zinc system ferrite material.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: April 3, 2001
    Assignee: TDK Corporation
    Inventors: Taku Murase, Masatsugu Morita, Naoyoshi Sato
  • Patent number: 6166454
    Abstract: A battery disconnection system (10) for a motor vehicle comprising a rod (12) having a longitudinal axis (A), an external threaded surface (14) extending from one end and a cylindrical member (16) extending coaxially with the rod (12), from the other end. Reversible drive means (20,22,24) engage the threaded surface (14). A first annular member (30) coaxial and in sliding contact with the cylindrical member (16). A second annular member (32) coaxial and in sliding contact with the cylidrical member (16). Either annular member being connectable with a motor vehicle battery. The other annular member being connectable with a starter motor and/or a generator (38) of a motor vehicle.
    Type: Grant
    Filed: September 23, 1999
    Date of Patent: December 26, 2000
    Assignee: Delphi Technologies, Inc.
    Inventors: Thomas Schaller, Jens Brake, Jurgen Dinger
  • Patent number: 6166457
    Abstract: A printed wiring board device used for electronic equipment, such as the information equipment, etc. A printed wiring board (10) has a power source layer (11) and a ground layer (12) and is mounted with active elements (3 and 4), such as digital ICs, etc. A first capacitor (1) which conductively couples the layers (11 and 12) with each other at a high frequency is provided in the peripheral section of one end side or the other end side of the section of the board (10) where the layers (11 and 12) are faced to each other. Second capacitors (2) which respectively supply transient currents to the active elements (3 and 4) are provided between the power supply pins (3V and 4V) of the elements (3 and 4) and the ground layer (12) near the elements (3 and 4). Therefore, the electromagnetic radiation caused by the power source layer (11) and the ground layer (12) of the printed wiring board (10) can be suppressed easily and remarkably.
    Type: Grant
    Filed: August 11, 1998
    Date of Patent: December 26, 2000
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Daisuke Iguchi, Osamu Ueno
  • Patent number: 6164560
    Abstract: A lawn care applicator system which is used on a vehicle having a vehicle electrical power system. The lawn care applicator system is specifically designed to be easy to use by an operator and to minimize electrical current usage, thereby allowing use of the applicator system with standard vehicle electrical power systems. The applicator system includes an applicator module that is removably mountable on the vehicle. The applicator module preferably includes a housing, at least one liquid supply tank disposed in the housing, and a liquid dispensing system disposed in the housing and connected to the liquid supply tank for dispensing liquid from the liquid supply tank and onto a lawn. A control system is electrically connected to the applicator module for providing power to, and controlling the operation of, the applicator module. The control system is adapted to be connected to the vehicle electrical power system to provide electrical power for the applicator system.
    Type: Grant
    Filed: February 18, 1998
    Date of Patent: December 26, 2000
    Assignee: Wanner Engineering, Inc.
    Inventors: Kenneth Eugene Lehrke, Frederick Allan Powers, Timothy Lynn Sebion, Gary Dean Ingle, Sr.
  • Patent number: 6166450
    Abstract: A control assembly for an automotive vehicle having an audio system and a climate control system, the control assembly having improved design characteristics, a reduced number of parts, and providing a reduced number of installation steps. The control assembly includes a control casing having a casing cover surface adapted to face an interior compartment of a vehicle and defining a plurality of openings therein, control elements adapted to produce operation signals for controlling the audio system and the climate control system, and an input-output section for receiving the operation signals and transmitting control signals for controlling the audio system and the climate control system. The input-output section is secured to the control casing so that the control elements are operably disposed on the cover surface through the openings. The casing cover, control elements and input-output section comprise an integral assembly that is easily installed in a production line of motor vehicles.
    Type: Grant
    Filed: December 3, 1998
    Date of Patent: December 26, 2000
    Assignees: Toyoda Gosei Co., Ltd., Harness System Technologies Research, Ltd.
    Inventors: Nobuo Watanabe, Katsuhiro Katagiri, Hideyuki Naganawa, Akiyoshi Nagano, Kenji Okamoto
  • Patent number: 6163081
    Abstract: The invention proposed an arrangement of the type comprising a unit into which the medium is introduced manually, and the type in which a device comprises means for longitudinally holding the data medium in an active position and means providing assistance with introducing and extracting the data medium, wherein the data medium has a window, and where the unit comprises a lever for immobilizing the medium which is mounted so that it can pivot, between a stable immobilizing position towards which the immobilizing lever is elastically returned and in which an immobilizing finger of the immobilizing lever extends vertically into the window, and a stable retracted position, to allow the data medium to be extended from the unit.
    Type: Grant
    Filed: June 9, 1999
    Date of Patent: December 19, 2000
    Assignees: Valeo Securite Habitacle, Renault
    Inventors: Louis Canard, Philippe Garcin
  • Patent number: 6160319
    Abstract: An improved key system incorporates a number of electrical components. In one main aspect, the key is provided with electrical communication to components on the vehicle when the key is inserted into the ignition. The key connects to an antenna associated with the vehicle, such that the combined antenna size is greater than would otherwise be possible. In this application, the antenna is utilized for garage door opener purposes, and a switch is mounted on the key for actuation of the garage door opener. In another aspect, the key is recharged when inserted into the ignition. Further, the key may be provided with various other functions such as memo, vehicle deactivation, two-way communication, and other security applications. In embodiments of the key, the switches are positioned relative to a thumb area such that inadvertent actuation of the switches is made less likely.
    Type: Grant
    Filed: January 20, 1999
    Date of Patent: December 12, 2000
    Assignee: Lear Automotive Dearborn, Inc.
    Inventors: LeeAnn Marougi, Marian O. Borzea, Joseph D. King
  • Patent number: 6157880
    Abstract: A crash detector activates a safety device (3, 4) such as an air-bag in a vehicle. The crash detector incorporates an acceleration sensor (10), the output of which must pass a threshold (11) before the signal is processed by a signal processor (2). The signal is processed optionally in conventional ways (13, 14; 16, 17) to activate the safety device. Activation of the safety device is inhibited by a slam algorithm generator (18). In the slam algorithm generator a control signal is generated which converges towards an average of the acceleration signal during periods of time in which the acceleration signal indicates an inward acceleration in excess of a predetermined level, the control signal being reduced at a substantially constant rate with time during periods in which the acceleration is not in excess of said predetermined level. The control signal is passed to a threshold means (19) which enables (15) actuation of the safety device (3, 4).
    Type: Grant
    Filed: May 7, 1999
    Date of Patent: December 5, 2000
    Assignee: Autoliv Developement AB
    Inventors: Bernard de Mersseman, Frederic Poux, Jerome Villanneau
  • Patent number: 6157089
    Abstract: A switching configuration for electrical control devices, in particular for use in control devices of an electrical system of power-driven vehicles is disclosed. The switching configuration includes a busline with a defined thermal conductivity and a defined heat capacity, which is connected with a first predefined power supply potential. The switching configuration has a plurality of switching devices for switching on and off at least one associated load of a respective switching device, for each of which a first current-conducting connection of the switching device is connected with the busline with a defined thermal conductivity and a heat capacity. Whereby each load of a respective switching device is connected between a second current-conducting connection of the switching devices and a second predefined power supply potential.
    Type: Grant
    Filed: July 29, 1999
    Date of Patent: December 5, 2000
    Assignee: Infineon Technologies AG
    Inventor: Chihao Xu
  • Patent number: 6157091
    Abstract: The electric power breaker for breaking the electric power is placed on the midpoint of the electric power line from the battery power supply, and the electric power line is extracted from the electric power breaker. In addition, the electric power supply terminal is placed on the midpoint on the electric power line, from which the electric power is supplied to the individual electric loads. The electric power distribution and the electric power supply operation to the electric loads are controlled by the multiplex communication. A semiconductor device having a self protection function is used as the switching device for supplying the electric power. The electric power line covered by the electric conductive material is arranged in a loop topology so as to start from the connection point to the battery and pass through the designated positions in the vehicle and return to the battery.
    Type: Grant
    Filed: August 25, 1999
    Date of Patent: December 5, 2000
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Tatsuya Yoshida, Hiroyuki Saito, Shinichi Sakamoto, Mitsuru Koni, Kiyoshi Horibe
  • Patent number: 6153945
    Abstract: The generator regulator includes a transistor power end stage (14) connected to the excitation winding (12) of the generator to provide a pulsed excitation current that passes through the excitation winding during operation and a device for activating and deactivating the transistor power end stage to turn on and off the excitation current in order to provide a predetermined pulse width for the pulsed excitation current passing through the excitation winding so as to maintain a constant output voltage. The device for activating and deactivating the transistor power end stage includes a comparator (16) for comparing a saturation voltage (U.sub.SAT) of the transistor power end stage (14) picked up between the transistor power end stage and the excitation winding with a reference voltage (U.sub.
    Type: Grant
    Filed: February 6, 1999
    Date of Patent: November 28, 2000
    Assignee: Robert Bosch GmbH
    Inventors: Thomas Koss, Gerhard Fiedler, Guenter Nasswetter, Egon Reisz
  • Patent number: 6153995
    Abstract: A water drop detection sensor for detecting water drops W adhering to or present upon a windshield by detecting changes in an amount of reflection light and also for detecting the ambient brightness outside of a car or other vehicle, comprising: a windshield 2; a light emitting means 5 for introducing detection light into the windshield 2; and a light receiving means 6 for detecting reflected detection light. The reflected detection light is reflected by total internal reflection within the windshield 2, and the light emitting means 5 and said light receiving means 6 are provided on the windshield 2.
    Type: Grant
    Filed: April 2, 1999
    Date of Patent: November 28, 2000
    Assignee: Nippon Sheet Glass Co., Ltd.
    Inventor: Shuhei Tanaka
  • Patent number: 6144906
    Abstract: An intelligent wiper system and method for wiping a windshield is disclosed having a microprocessor which controls the operation of a motor and which is capable of setting a baseline delay time using one or more wipe times, with the baseline delay time generally corresponding to a time interval between consecutive wipes of at least one wiper blade. The system and method automatically adjusts the baseline delay time in response to the second wipe time if the second wipe time is not substantially the same as a function of the first wipe time, wherein the function includes a predetermined constant which is at least one hundred percent of a first wipe time. An upper baseline wipe time threshold and a lower baseline wipe time threshold may be established such that the delay time is not adjusted if a current wipe time falls between such thresholds.
    Type: Grant
    Filed: August 6, 1999
    Date of Patent: November 7, 2000
    Assignee: Valeo Electrical Systems, Inc.
    Inventors: Harry C. Buchanan, Jr., Richard L. Ponziani, Joseph P. Whinnery
  • Patent number: 6144110
    Abstract: A vehicular use power distribution apparatus includes a battery mounted in a vehicle; a main control means connected directly to the battery; a first switch means connected to the battery; a power feed line for loads connected to the first switch means and supplying power to loads mounted in the vehicle; a second switch means connected to the battery; a power feed line for control means connected to the second switch means and controlling the loads; and a sub control means connected to the power feed line for control means. In a first state, the main control means sets the first switch means and the second switch means to a connection state so as to supply power from the battery to the power feed line for loads and the power feed line for control means.
    Type: Grant
    Filed: March 18, 1998
    Date of Patent: November 7, 2000
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Yutaka Matsuda, Satoshi Kawai, Shigeki Motomura
  • Patent number: 6144112
    Abstract: The present invention relates to an apparatus and a method for a motor vehicle security system relating to immobilizing and enabling of a fuel pump for a motor vehicle engine. The system comprises data input means for receiving driver verification data, an engine control unit (ECU) including an ECU processor for controlling engine operation, a pump control unit (PCU) including a PCU processor for controlling the fuel pump, the PCU being separate from the ECU and integrally housed with the fuel pump. Communication links permit communication between the data input means and ECU, and between the ECU and PCU. The ECU processor is activated to control the PCU when valid driver verification data is received. The PCU processor is then activated to communicate a challenge code to the ECU. The ECU and PCU processors then compute respectively a first and a second response code associated with the challenge code.
    Type: Grant
    Filed: October 14, 1999
    Date of Patent: November 7, 2000
    Assignee: Ford Global Technologies, Inc.
    Inventor: Paul Robert Gilmore
  • Patent number: 6141207
    Abstract: A light leakage preventing structure of a combination meter includes: a plurality of scale plates being arranged so that their edges face each other with a gap being provided therebetween; and a light shielding member to be mounted to rear surfaces of facing portions of the edges. In the structure: the edges of the facing portions of the scale plates are formed into a flat plate shape; and the light shielding member has a dark space opened towards the facing portions.
    Type: Grant
    Filed: January 6, 1999
    Date of Patent: October 31, 2000
    Assignee: Yazaki Corporation
    Inventor: Shinji Narama
  • Patent number: 6138065
    Abstract: A method and system for providing enhanced diagnostic ability for monitoring vehicle performance characteristics includes utilizing a combination of temperature and lubrication level information. A first sensor monitors the temperature of a selected component, such as an axle, while a second sensor detects an amount of lubrication associated with that component. An electronic controller utilizes the temperature and lubrication level information to determine a performance characteristic and determines whether the selected component is operating within an acceptable range. The electronic controller preferably provides information to a vehicle operator through an on-board display indicating the monitored and determined characteristics on a real-time basis. Additionally, the electronic controller includes a memory module that stores performance characteristics information over time so that information can be provided to a service technician utilizing an external diagnostic computer.
    Type: Grant
    Filed: January 6, 1999
    Date of Patent: October 24, 2000
    Assignee: Meritor Heavy Vehicle Systems, LLC
    Inventor: Dennis A. Kramer
  • Patent number: 6133645
    Abstract: An electronic disconnect circuit protects an electronic device, such as a radio, installed in a motor vehicle from overvoltage condition in which the normal internal protection is inadequate. A normally closed relay includes 2 sets of terminals connected in the ground conductor and in the voltage conductor of the power cable connected to the electronic device. The relay coil is connected through a diode which becomes conductive if the voltage in the ground conductor rises above the voltage in the other conductor, thus protecting the radio or similar electronic device from a reversal of polarity as would occur when a battery charger or similar device is improperly connected to the vehicle. A switching transistor responds to an over voltage condition to turn on the relay coil when an over voltage condition occurs, such as during a high voltage jump start or a high voltage transient condition.
    Type: Grant
    Filed: March 5, 1999
    Date of Patent: October 17, 2000
    Assignee: Audiovox Specialized Applications
    Inventors: Paul Scribner, Dan Semple
  • Patent number: 6134502
    Abstract: A method for determining an alternate path by a mobile machine to avoid at least one obstacle. The method includes the steps of assigning an initial value of charge to the mobile machine, assigning a value of charge to a desired destination, determining the presence and the locations of at least one obstacle, and assigning a value of charge to each determined obstacle. The method further includes the steps of determining a force vector equation for each of the desired destination and each obstacle with respect to the mobile machine, determining a resultant force vector as a function of the force vector equations, and controlling the steering and movement of the mobile machine in response to the resultant force vector.
    Type: Grant
    Filed: November 30, 1998
    Date of Patent: October 17, 2000
    Assignee: Caterpillar Inc.
    Inventor: Jagannathan Sarangapani
  • Patent number: 6133646
    Abstract: When a control unit for controlling a 2-motor-3-relay type locking system makes a transition to, for example, an N/L (lock) state, the two motors are turned on or off such that operation timings of the motors are shifted from each other by a period of time longer than a shift amount (variation) of required operation times of the relays.
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: October 17, 2000
    Assignee: Mazda Motor Corporation
    Inventors: Kunio Segawa, Toshifumi Ikeda