Patents by Inventor Hisashi Thuruoka

Hisashi Thuruoka 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).

  • Digital displacement sensor with zigzag coils
    Patent number: 4005396
    Abstract: A digital displacement sensor includes a plurality of zigzag coils provided with projecting or convex portions having different pitches and arranged on the surface of a flat plate. A magnetic head consisting of a magnetic body and a coil is wound around part of the magnetic body, the magnetic head being supported so as to be moved, while maintaining a given gap from the surface of the flat plate, whereby a digital signal corresponding to the displacement of the magnetic head is sensed by means of a plurality of zigzag coils.
    Type: Grant
    Filed: November 18, 1974
    Date of Patent: January 25, 1977
    Assignee: Hitachi, Ltd.
    Inventors: Hideo Fujiwara, Yukio Ichinose, Kazuo Ichino, Isamu Orita, Yasutaro Uesaka, Michiyasu Itoh, Hisashi Thuruoka