Patents by Inventor Koichi Sakai

Koichi Sakai 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: 4122422
    Abstract: In a deflection yoke for use with an in-line color cathode ray tube in which a plurality of electron beams originating in a common plane, for example, a horizontal plane, within a tube envelope are directed forwardly along paths converging through the deflection yoke to impinge on a screen at the front of the tube envelope, and in which the deflection yoke is made up of vertical and horizontal deflection windings for producing magnetic fields by which the electron beams are deflected in vertical and horizontal directions, each of the vertical and horizontal deflection windings is of saddle form so as to have side portions connected by bent front and back end portions, the vertical deflection winding is disposed against the tube envelope and has its bent back end portion shaped to closely conform to the surface of the tube envelope, the horizontal deflection winding is disposed outside of the vertical deflection winding, and the bent back end portion of the vertical deflection winding is closer to the screen a
    Type: Grant
    Filed: January 26, 1977
    Date of Patent: October 24, 1978
    Assignee: Sony Corporation
    Inventors: Yoshikazu Hasegawa, Yasuyuki Ohmichi, Koichi Sakai
  • Patent number: 4096531
    Abstract: A deflection yoke for use with a cathode ray tube includes a pair of half-cut separators joined together to form a complete separator, a pair of saddle wound horizontal deflection coils mounted on the separator halves and a pair of toroidal wound vertical deflection coils wound about half-cut coils and assembled about the separator. The plane of separation between the saddle wound horizontal deflection coils, the half-cut separators and the toroidal wound vertical deflection coil is the same plane. Provision is also made for proper orientation of the saddle wound horizontal deflection coils in each half-cut separator and for location of the toroidal wound vertical deflection coil about the separator.
    Type: Grant
    Filed: May 25, 1977
    Date of Patent: June 20, 1978
    Assignee: Sony Corporation
    Inventors: Yukio Yamada, Yoji Ishikawa, Koichi Sakai
  • Patent number: 4041428
    Abstract: A deflection yoke for use with an in-line cathode ray tube in which a plurality of electron beams are laid, for example, in a horizontal plane, which has a horizontal deflection winding formed in the saddle shape with front and rear bends for producing a pincushion type magnetic field and a vertical deflection winding wound toroidally around a magnetic core to surround the horizontal deflection winding between the front and rear bends for producing a barrel type magnetic field, wherein the vertical deflection winding is shorter than the distance between the front and rear bends of the horizontal deflection winding and is positioned adjacent the front bend and with a predetermined space from the rear bend. The use of the deflection yoke with the in-line cathode ray tube can eliminate or simplify a dynamic convergence correcting device.
    Type: Grant
    Filed: August 31, 1976
    Date of Patent: August 9, 1977
    Assignee: Sony Corporation
    Inventors: Yasuo Kikuchi, Yasuyuki Ohmichi, Osamu Terasaki, Koichi Sakai