Patents by Inventor Shunji Tokumitsu

Shunji Tokumitsu 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: 7191458
    Abstract: A turnable for mounting an optical disk without the occurrence of eccentricity including: a fixed portion (48) fitted in a center hole of the optical disk; a movable portion (50) fitted in the center hole with the fixed portion (48) as a reference so as to be elastically deformed to correct the eccentricity when the optical disk is mounted; a shaft portion (42) molded integrally with the fixed portion (48) and into which is inserted a drive shaft (14a) of a drive motor for rotating a turntable (12) continuously; and a plate spring (60) for returning, when the optical disk is not mounted, the movable portion (50) from a position when the optical disk is mounted to a position when not mounted. The plate spring (60) is secured to the shaft portion (42) directly.
    Type: Grant
    Filed: August 24, 2004
    Date of Patent: March 13, 2007
    Assignee: Sony Corporation
    Inventor: Shunji Tokumitsu
  • Publication number: 20050028182
    Abstract: A for mounting an optical disk without the occurrence of eccentricity including: a fixed portion (48) fitted in a centre hole of the optical disk; a movable portion (50) fitted in the centre hole with the fixed portion (48) as a reference so as to be elastically deformed to correct the eccentricity when the optical disk is mounted; a shaft portion (42) molded integrally with the fixed portion (48) and into which is inserted a drive shaft (14a) of a drive motor for rotating a turntable (12) continuously; and a plate spring (60) for returning, when the optical disk is not mounted, the movable portion (50) from a position when the optical disk is mounted to a position when not mounted. The plate spring (60) is secured to the shaft portion (42) directly.
    Type: Application
    Filed: August 24, 2004
    Publication date: February 3, 2005
    Inventor: Shunji Tokumitsu
  • Patent number: 6829777
    Abstract: A turntable for mounting an optical disk without occurrence of eccentricity including: a fixed portion (48) fitted in a centre hole of the optical disk; a movable portion (50) fitted in the center hole with the fixed portion (48) as a reference so as to be elastically deformed to correct eccentricity when the optical disk is mounted; a shaft portion (42) molded integrally with the fixed portion (48) and into which is inserted a drive shaft (14a) of a drive motor for rotating a turntable (12) continuously; and a plate spring (60) for returning, when the optical disk is not mounted, the movable portion (50) from a position when the optical disk is mounted to a position when not mounted. The plate spring (60) is secured to the shaft portion (42) directly.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: December 7, 2004
    Assignee: Sony Corporation
    Inventor: Shunji Tokumitsu
  • Publication number: 20030076774
    Abstract: A turn table for mounting an optical disk without occurrence of eccentricity including: a fixed portion (48) fitted in a centre hole of the optical disk; a movable portion (50) fitted in the centre hole with the fixed portion (48) as a reference to be elastically deformed to correct eccentricity when the optical disk is mounted; a shaft portion (42) molded integral with the fixed portion (48) and into which is inserted a drive shaft (14a) of a drive motor for rotating a turn table (12) continuously; and a plate spring (60) for returning, when the optical disk is not mounted, the movable portion (50) from a position when the optical disk is mounted to a position when not mounted. The plate spring (60) is secured to the shaft portion (42) directly.
    Type: Application
    Filed: October 17, 2002
    Publication date: April 24, 2003
    Inventor: Shunji Tokumitsu
  • Patent number: 4412321
    Abstract: A record changer for a record playing apparatus of the type including a center spindle on which records are adapted to be held and then dropped onto a turntable to be played, includes a tone arm for reproducing signals which are recorded on a record, dropped onto the turntable, a detecting device for detecting the position of the tone arm, an operating mechanism for controlling the operation of the record changer when the detecting device detects that the tone arm is in an inoperative position, and a device for stopping the operation of the record changer during operation of the operating means when the detecting device detects that the tone arm is in an operative position.
    Type: Grant
    Filed: March 18, 1981
    Date of Patent: October 25, 1983
    Assignee: Sony Corporation
    Inventors: Shunji Tokumitsu, Hiroyuki Urushibata, Masao Goto
  • Patent number: 4113264
    Abstract: In a phonograph record player having a tone arm carrying a pickup with a stylus to track the groove of a phonograph record on a turntable during a play operation and being mounted for lead-in movement from an elevated rest position outside the turntable perimeter to a selected set-down position of the stylus on the record for commencement of a play operation and for return or lead-out movement back to the rest position on termination of a play operation, a control mechanism is provided with a single mode selecting member or slide which is manually movable to positions for selecting stop, manual and repeat modes of operation, respectively, of the record player.
    Type: Grant
    Filed: May 19, 1977
    Date of Patent: September 12, 1978
    Assignee: Sony Corporation
    Inventors: Toru Sato, Shunji Tokumitsu, Masaaki Sakai, Kazuhiko Kawasaki, Kenichiro Kaimori, Mitsuo Osawa