Patents by Inventor Etsuo Tsurumi

Etsuo Tsurumi 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).

  • Transformer with gapped core
    Patent number: 4305056
    Abstract: In a transformer for use in a receiver set, a non-magnetic material arranged in part of a closed magnetic path established by a magnetic core is made of a plastic material such as paper mash or silicon putty. The non-magnetic material is pressurized and deformed so as to set the inductance of a coil mounted on the magnetic core to a predetermined value.
    Type: Grant
    Filed: November 29, 1979
    Date of Patent: December 8, 1981
    Assignee: Hitachi, Ltd.
    Inventors: Hideyuki Mochida, Etsuo Tsurumi, Shingo Tamura, Noboru Mitsugi
  • High voltage rectifier for television receiver sets
    Patent number: 4293903
    Abstract: In a high voltage rectifier for use in a television receiver set, a resistor block is incorporated therein to produce focusing and screen voltages, and a focusing voltage feeder for supplying the focusing voltage to a cathode ray tube is covered by a screen voltage feeder for supplying the screen voltage to the cathode ray tube to form a unitary high voltage insulated cable.
    Type: Grant
    Filed: April 29, 1980
    Date of Patent: October 6, 1981
    Assignee: Hitachi, Ltd.
    Inventors: Hideyuki Mochida, Shingo Tamura, Etsuo Tsurumi