Patents Examined by Raymond Barrena
  • Patent number: 5719455
    Abstract: A method of designing a superconductivity employing apparatus includes the steps of causing a magnetism generating disk-shaped floatable portion (4) to face a disk-shaped fixed portion (2) capable of exhibiting superconductivity with a gap (G) therebetween; initializing the fixed portion (2) to reach a superconducting state at a position where the floatable portion (4) is spaced away from the fixed portion (2) to such an extent that its magnetic field does not influence the fixed portion (2); and using properly first, second, and n-th approach characteristics (S1, S2, Sn) when a difference between an n-th approach characteristic (Sn) and the second characteristic (S2) is smaller than a difference between the first and second characteristics (S1, S2), where the first approach characteristic (S1) is a characteristic of a magnetic floating force obtained by allowing the floatable portion (4) to approach the fixed portion (2), the second approach characteristic (S2) is a characteristic of a magnetic floating forc
    Type: Grant
    Filed: December 2, 1996
    Date of Patent: February 17, 1998
    Assignee: Kabushiki Kaisha Shikoku Sogo Kenkyusho
    Inventors: Hiromasa Higasa, Fumihiko Ishikawa, Masanori Yamashita, Makoto Hirose
  • Patent number: 5578979
    Abstract: An improved electromagnetic apparatus includes a core and an armature which is movable relative to the core. A shading ring is connected with the core to provide magnetic flux which is out of phase with magnetic flux from the core. The shading ring includes a base formed a first metal and a layer of a second metal clad to the base. The first metal forming the base work hardens and has a greater resistance to fatigue failure induced by vibration than the second metal of the layer which is clad to the base. However, the second metal forming the clad layer has a greater electrical conductivity than the first metal of the base. The base may be formed of aluminum and the layer of metal clad to the base may be formed of copper. The layer of copper may be clad to the base by an extrusion process.
    Type: Grant
    Filed: January 6, 1993
    Date of Patent: November 26, 1996
    Assignee: Eaton Corporation
    Inventors: David M. Adams, Jerome K. Hastings
  • Patent number: 5266914
    Abstract: A magnetic chuck assembly comprises top and bottom plates separated by a layer of non-magnetizable material, each plate having magnetizable sections separated by strips of non-magnetic material. A rotor mounted between the top and bottom plates carries a plurality of permanent magnets substantially symmetrically disposed therein. The magnets in each half of the rotor are of the same polarity but those in one half are of opposite polarity to those in the other. When the rotor is turned to a position in which all the magnets of like polarity in one half thereof lie between the magnetizable sections of the plates on the same side of the non-magnetizable strips, the sections become magnetized and hold a magnetizable workpiece in place on the edges of the plate. Switching the rotor to a position in which equal numbers of magnets of opposite polarity lie between the magnetizable sections serves to de-energize the latter and release the workpiece.
    Type: Grant
    Filed: June 15, 1992
    Date of Patent: November 30, 1993
    Assignee: The Herman Schmidt Company
    Inventors: Robert M. Dickson, Hermann Schmidt