Patents by Inventor Michael V. Fisher

Michael V. Fisher has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5200391
    Abstract: A process for joining ceramic superconductor fibers with a channel to fabricate a superconductor wire includes concertedly drawing the fibers and the channel together to feed the fibers into the channel. A flowable solder paste is continuously dispensed into the channel over the fibers. The combination of channel, fibers and solder paste is then subjected to a rapid rise in temperature which melts the solder. The molten solder is then frozen to encase the fibers in the solder and attach the solder to the channel to create a superconductor wire.
    Type: Grant
    Filed: September 24, 1990
    Date of Patent: April 6, 1993
    Assignee: General Atomics
    Inventors: Michael V. Fisher, Kurt M. Schaubel, Lawrence D. Woolf, Robert A. Olstad, William A. Raggio
  • Patent number: 5118663
    Abstract: A method and apparatus for manufacturing a superconductor wire has a wire take-up spool and a feed speed control spool. A wire substrate is taken from the feed speed control spool and onto the take-up spool as the wire take-up spool is rotated. The wire passes through a container which holds a diffusion barrier material, where the diffusion barrier material is electrophoretically deposited onto the wire substrate and subsequently sintered. The wire is also passed through a container which holds a superconductor material suspended in solution, and a layer of the superconductor material is electrophoretically deposited onto the diffusion barrier. The grains of the superconductor layer are then magnetically aligned and sintered. Also, a silver coating is electrophoretically deposited onto the superconductor layer and sintered. A diffusion bonding inhibitor material is then applied to the silver coating. Then, the silver-coated superconductor wire is spooled and heated to four hundred degrees centigrade (400.
    Type: Grant
    Filed: September 21, 1990
    Date of Patent: June 2, 1992
    Assignee: General Atomics
    Inventors: Lawrence D. Woolf, Michael V. Fisher, William A. Raggio, Frederick H. Elsner
  • Patent number: 5114087
    Abstract: A device for aligning superconductor filaments to form a filament layer includes a backboard and a number of motor-driven supply spools. Each of the supply spools is rotatably mounted on the backboard, and each of the supply spools holds one end of an individual superconductor filament. The opposite ends of the filaments are attached to a single rotatable wire take-up spool. Accordingly, the wire take-up spool can be rotated to transfer the filaments from the respective supply spools to the take-up spool. A combiner board is mounted on the backboard normal to the backboard between the supply spools and the wire take-up spool. The combiner board receives each of the superconductor filaments as the filaments are transferred from the respective supply spools to the take-up spool to guide the filaments into a layer of aligned superconductor filaments. Additionally, each supply spool has a tension controller individually associated with the respective supply spool.
    Type: Grant
    Filed: September 21, 1990
    Date of Patent: May 19, 1992
    Assignee: General Atomics
    Inventors: Michael V. Fisher, Kurt M. Schaubel, William A. Raggio
  • Patent number: 5080296
    Abstract: A system for maintaining a predetermined tension of a wire has a rotatable wire supply spool, a motor-driven wire take-up spool, a motor-drive wire feed spool. The wire is wound around the supply spool and is also attached to the take-up spool. The wire also passes partially around the feed spool and a pulley or guide which is attached to a pivot arm. The pivot arm is positioned between the take-up spool and the supply spool. A frictional layer is disposed around the outer circumferential surface of the feed spool, to prevent the wire from sliding across the frictional layer of the feed spool.The elongated pivot arm that has its free end positioned against the wire. The pivot arm pivots in response to the differences in speed between the supply and take-up spool. A motion sensor detects motion of the pivot arm and generates a control signal in response. The control signal is electrically conducted to a stepper motor.
    Type: Grant
    Filed: September 24, 1990
    Date of Patent: January 14, 1992
    Assignee: General Atomics
    Inventors: William A. Raggio, Michael V. Fisher