Patents Examined by Raymond Barrera
  • Patent number: 6069545
    Abstract: An electrical switch has a set of electrodes mounted on one side of a carrier. The opposite side of the carrier mounts an actuator having a plunger mounted for reciprocating motion. The plunger carries a coupler in the form of magnets. A conductive armature of magnetic material is disposed on the electrode side of the carrier. When the plunger withdraws the coupler magnets from the carrier, the armature is free to fall out of contact with the electrodes. A retention cover maintains the armature in the vicinity of the carrier such that subsequent movement of the coupler proximate the carrier will draw the armature back into contact with the electrodes.
    Type: Grant
    Filed: January 8, 1999
    Date of Patent: May 30, 2000
    Assignee: DuraSwitch Industries, Inc.
    Inventor: Anthony J. Van Zeeland
  • Patent number: 6067001
    Abstract: A very flexible method for designing electromagnets which produce an arbitrary magnetic field. The conductors of the magnet can be constrained to an arbitrary surface or volume. The method provides the lowest power (or shortest wire-length) design given constraints on the desired magnetic field and constraints on where the coils can be located with respect to the desired magnetic field. The method begins with establishing a mesh of nodes and current elements connecting the nodes. The mesh can have any 2 or 3 dimensional shape (e.g. a rectangular grid on a cylinder). The magnet conductors can only be located where current elements are defined. A number of target points are established and a desired magnetic field is defined for each target point. Next, a matrix of coefficients is defined which relates the current in each current element with the magnetic field at each target point. Also, a total power expression is defined for the power consumed in the current elements.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: May 23, 2000
    Assignee: The Board Trustees of the Leland Stanford Junior University
    Inventors: Hao Xu, Steven M. Conolly
  • Patent number: 6066999
    Abstract: An electromagnetic actuator includes an electromagnet having a yoke and an operating coil supported by the yoke and connectable to a controllable current supply for effecting a current flow through said operating coil. An armature is movable from a first position remote from the pole face of the electromagnet to a second, pole face-engaging position in response to a first electromagnetic force generated by a current flow through the operating coil. A resetting spring is coupled to the armature and opposes the first electromagnetic force. Further, a circuit is provided which is formed of a braking coil supported by the yoke and a switching element having open and closed states. The circuit is closed in the closed state of the switching element and is in the open state of the switching element.
    Type: Grant
    Filed: March 2, 1998
    Date of Patent: May 23, 2000
    Assignee: FEV Motorentechnik GmbH & Co. KG
    Inventor: Martin Pischinger
  • Patent number: 6066998
    Abstract: An actuator made up of a plurality of actuator elements is provided which actuator provides long travel in one dimension and short travel in five additional dimensions, with each actuator element providing long travel in the one dimension and short travel in at least two additional dimensions. For preferred embodiments, each actuator element includes a suspension core, the long travel being in one linear dimension and each actuator element providing short travel in two additional linear dimensions and at least one rotary dimension.
    Type: Grant
    Filed: September 12, 1996
    Date of Patent: May 23, 2000
    Assignee: Massachusetts Institute of Technology
    Inventors: David L. Trumper, Lawrence S. Schwartz
  • Patent number: 6067000
    Abstract: An electromagnetic actuator 10 includes housing structure 12, first and second electromagnets 14 and 16 disposed in spaced relation in the housing structure, an armature 24 mounted for reciprocal movement between the electromagnets, and a spring assembly 11 operatively associated with the armature 24. The spring assembly includes a coil spring 30, a spring retainer 32 carrying the coil spring and being constructed and arranged to contact the armature 24, a spring adjusting member 38 engaged with a bore in the housing structure 12 and engaging the spring 30 so as to control compression of the spring associated with a set position of the armature 24 between the electromagnets. At least one cap screw 50 extends from a surface of the housing structure generally adjacent to the bore. A locking member 56 is engaged with the spring adjusting member 38 and with the cap screw 50.
    Type: Grant
    Filed: January 21, 1999
    Date of Patent: May 23, 2000
    Assignee: Siemens Automotive Corporation
    Inventors: Dennis Bulgatz, Timothy S. Roach
  • Patent number: 6062140
    Abstract: A magnetic cylinder for printing plates and the like has an air manifold within the body of the cylinder for applying the force of pressurized air against the plate when mounting the plate onto the cylinder to enable the plate to be accurately registered on the cylinder before it is magnetically latched onto the cylinder.
    Type: Grant
    Filed: May 10, 1999
    Date of Patent: May 16, 2000
    Assignee: T. D. Wright, Inc.
    Inventor: David A. McEachern
  • Patent number: 6064289
    Abstract: An electromagnetic starter with an overload relay having magnetic flux shielding is disclosed for use in industrial contactor applications. The starter includes a multi-pole DC controlled contactor which is interlockingly coupled to an overload relay. The overload relay has a simplified interlocking connection to the contactor, which when made, corresponds to an abutting electrical connection between the contactor and the overload relay also being made. The contactor further has a guiding pin that promotes even contact closure within the contactor.
    Type: Grant
    Filed: March 12, 1999
    Date of Patent: May 16, 2000
    Assignee: Eaton Corporation
    Inventors: Christopher J. Wieloch, Kurt von Eckroth, David S. Hunter, Mike T. Little, Jan J. Walker, James A. Becker
  • Patent number: 6064290
    Abstract: A homogeneous field electromagnet having at least two coils in each of two regions. One region has a smaller inner radius than the other region so that the magnet is asymmetrical. The magnet has coils with a smaller radius on one side compared to the other side. This provides the benefit of allowing the magnet to be shorter for a given field of view size (compared to a uniform-radius cylindrical magnet). In a preferred embodiment the magnet is short enough so that a patient's heart can be located within the field of view (FOV) while visual access is provided to the patient's face. Specific dimensions are given for the two regions, including lengths, inner radii, and outer radii. The magnet can also include gradient coils and RF electronics for magnetic resonance imaging.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: May 16, 2000
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Hao Xu, Steven Conolly, Bob S. Hu
  • Patent number: 6060971
    Abstract: The present invention provides a superconducting magnet device for a crystal pulling device comprising a pair of ring-like superconducting coils facing with each other, with the crystal pulling device disposed therebetween, a radiation shield surrounding the superconducting coils, and a vessel surrounding the radiation shield, wherein the vessel on the side facing to the crystal pulling device is made from a nonmagnetic substance, and the vessel on the other side is made from a magnetic substance.
    Type: Grant
    Filed: February 16, 1999
    Date of Patent: May 9, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Sasaki, Masanori Arata
  • Patent number: 6057750
    Abstract: A magnet device with double fixing positions for changing the magnetic circuit is provided, and includes an external housing whose inner edge is fitted with a coil The inside of the external housing includes a space for the axial movement of an iron core. The external housing and a positioning cover at the opening end of the housing are made of metal with excellent magnetic conductivity. The iron core is connected to a permanent magnet which is fixed at the inner side of the positioning cover. A drive circuit is provided whereby a positive impulse voltage will be output and the electrical energy is saved in a capacitor when the power is switched on. A discharge current is created to output a negative impulse voltage after the power is switched off, and the positive and the negative impulse voltages serve to make the coil change the direction of the magnetic force by the excitation process, so that a push force or a pull force on the iron core will be created for movement thereof.
    Type: Grant
    Filed: May 6, 1999
    Date of Patent: May 2, 2000
    Inventor: Chih-Sheng Sheng
  • Patent number: 6054913
    Abstract: An apparatus for creating and controlling a toroidal magnetic field, and a poloidal magnetic field employs a conductive sheet rolled into a spiral with cut outer legs aligned and bent outwardly toward a position approximately adjacent to corresponding other cut outer legs. Such apparatus is formed by forming a conductive sheet; cutting a first plurality of cut outer legs into the sheet; cutting a second plurality of cut outer legs into the sheet; rolling the conductive sheet into a spiral; and bending outwardly each of the cut outer legs. In an alternative, the apparatus has a conductive tube with each of a first plurality cut outer legs bent outwardly to couple to corresponding ones of a second plurality of cut outer legs.
    Type: Grant
    Filed: October 28, 1997
    Date of Patent: April 25, 2000
    Assignee: General Atomics
    Inventor: James A. Leuer
  • Patent number: 6052045
    Abstract: A reed switch package is disclosed that includes a reed switch with at least one electrical signal path. A cylindrical ground shield is provided about the reed switch. Ground terminals are connected to opposing sides of the ground shield so that the ground terminals are on opposing sides of the signal terminal and lie in the same plane. The reed switch resides on a support substrate. An electrically conductive signal via extends through said main body and connects to the signal terminal. Ground vias extend through the main body and respectively connect to the ground terminals. The grounds vias are on opposing sides of the signal via and lie in the same plane as the signal via. The signal and ground via exit at the bottom of the main body and are connected to a circuit via solder balls to provide a compact surface mount package with a controlled impedance environment.
    Type: Grant
    Filed: March 12, 1999
    Date of Patent: April 18, 2000
    Assignee: Kearney-National, Inc.
    Inventor: Mark E. Martich
  • Patent number: 6052046
    Abstract: A two pole circuit breaker having arc fault and ground fault protection circuits, in addition to a standard thermal-magnetic trip units, that is designed to fit in a standard knock-out, three-quarter inch or one-inch, of a circuit breaker load center panel. The circuit breaker is divided into three compartments with two side-by-side compartments housing the electro-magnetic trip mechanism respectively for each pole, and a third compartment in tandem with the other two for housing the electronics associated with the ground fault and arc fault protection circuits. The circuit breaker spans the area allocated to a single knock-out with portions of the electro-magnetic trip compartments seated within the knock-out opening and with the third compartment hidden behind the panel.
    Type: Grant
    Filed: July 24, 1998
    Date of Patent: April 18, 2000
    Assignee: Eaton Corporation
    Inventors: Ralph Mason Ennis, Thomas Michael Doring
  • Patent number: 6043730
    Abstract: An electromagnetic actuator has an iron core around which a coil is wound; two permanent magnets, the same poles of which are placed on the ends of the core which extend beyond the coil and which have the same direction of polarity; magnetic poles formed on either end of the iron core; a yoke which connects the poles of the magnets opposite those which face the core; and an iron armature which is supported by a fulcrum on the yoke in such a way that it is free to rotate around the fulcrum, and which has on either end a magnetic pole which faces one of the poles of the core.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: March 28, 2000
    Assignee: Omron Corporation
    Inventors: Kozo Maenishi, Kazuo Tsuboi
  • Patent number: 6043729
    Abstract: A superconductive magnet includes a superconductive coil assembly having a cryogenic vessel, a thermal shield enclosing the cryogenic vessel, and a vacuum enclosure enclosing the thermal shield. The cryogenic vessel, thermal shield and vacuum vessel have annular shells radially spaced apart from one another with reference to a common longitudinal axis and coaxially aligned with the common longitudinal axis. The magnet also includes a tube suspension assembly having a plurality of tubes located between respective ones of the cryogenic vessel, thermal shield and vacuum enclosure. The tubes are axially overlapped and are interconnected with one another and with the cryogenic vessel, thermal shield and vacuum enclosure. One tube has an end forming a sliding joint with the cryogenic vessel that allows both radial and axial movement of the cryogenic vessel relative to the thermal shield and vacuum enclosure during cooldown of the cryogenic vessel from ambient to cryogenic temperatures.
    Type: Grant
    Filed: November 13, 1998
    Date of Patent: March 28, 2000
    Assignee: General Electric Company
    Inventors: Evangelos Trifon Laskaris, Bruce Campbell Amm, Somanath Nagendra
  • Patent number: 6040752
    Abstract: An electromagnetic actuator has two permanent magnets arranged along their polar axes, with the proximal poles having same polarity. An electromagnet surrounds the two permanent magnets and, when energized, overrides the repulsion between the proximal poles and moves one permanent magnet toward the other fixed magnet. Should the electromagnet fail, the actuator reverts to the unactuated position without need of a spring, gravity and so forth.
    Type: Grant
    Filed: June 18, 1998
    Date of Patent: March 21, 2000
    Inventor: Jack E. Fisher
  • Patent number: 6040750
    Abstract: A switching device is provided which includes a magnet system having a yoke which is elastically mounted by means of a volute spring. The volute spring permits the yoke to be displaced as far as closure of the magnet system. As a result, it is possible to prevent current overloading of the magnet system coil in the case of a welded break contact of the switching device.
    Type: Grant
    Filed: May 20, 1999
    Date of Patent: March 21, 2000
    Assignee: Siemens Aktiengesellschaft
    Inventor: Hans Pfab
  • Patent number: 6037853
    Abstract: A device for displaying the loose coupling between magnetic fields is provided, comprising a first disk having a plurality of magnetic elements attached to the first disk so that the magnetic field of said magnets extend radially from an outer edge of the first disk, a second disk having a plurality of magnetic elements attached to the second disk so that the magnetic field of said magnets extend radially from an outer edge of the second disk so that the magnets on the disks are loosely coupled to each other, the strength of the loose coupling depending on the orientation of the magnets with respect to each other, and a rotatable control member having a magnetic element attached to an end of the control member, the control member magnet being rotated to a first position such that a predetermined pole of the control member magnet is located adjacent to the magnets on said first disk causing a magnetic coupling of the magnet on said control member to the magnets on said first so that loose coupling and the chao
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: March 14, 2000
    Assignee: The New Curiosity Shop Inc.
    Inventor: Ilan S. Chabay
  • Patent number: 6037852
    Abstract: An inexpensive and simple magnet damping arrangement, in particular for contactors with a.c. solenoids, is to be created. The non-switching magnet yoke of an electromagnet system with magnet coil is damped by a single damping compression spring which is supported on the bobbin of the magnet coil at one end and directly on the magnet yoke at the other end.
    Type: Grant
    Filed: August 28, 1998
    Date of Patent: March 14, 2000
    Assignee: Siemens AG
    Inventor: Hans Pfab
  • Patent number: 6034583
    Abstract: A polarized electromagnetic relay has a base body, an armature, an envelope that comprises insulating material, a coil, a core and a bar-shaped magnet. The base plane is defined by a bottom side of the base body. The armature is arranged between two contact springs that lie parallel to each other in a common plane. Two transverse terminal webs, which have their sheet metal plane extending perpendicular to the base plane, extend out of the envelope in the area of the rotational axis of the armature. The terminal webs are respectively connected with fastening tabs that have a sheet metal plane extending perpendicular to the base plane. The contact springs exhibit two spring arms and a connecting web, respectively, which has its sheet metal plane extending perpendicular to the base plane. The spring arms exhibit a contact making part and a part that is embedded in the envelope, respectively. The part that is embedded in the envelope merges into the connecting web.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: March 7, 2000
    Assignee: Siemens Electromechanical Components GmbH & Co. KG
    Inventor: Michael Dittmann