Patents by Inventor Eihachiro Tomita

Eihachiro Tomita 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).

  • Capacitor discharge circuit
    Patent number: 4504773
    Abstract: A capacitor discharge circuit constructed by a combination of a mechanical switch and an electronic switch. The electronic switch is automatically turned on with a predetermined time delay after closing of the mechanical switch. The mechanical switch is used to completely separate a high voltage-large capacity capacitor from a load when the discharge operation is not required. The wear and tear of contacts in the mechanical switch can be avoided by the delayed operation of the electronic switch.
    Type: Grant
    Filed: September 8, 1982
    Date of Patent: March 12, 1985
    Assignees: Kureha Kagaku Kogyo Kabushiki Kaisha, Radio Research Technical, Inc.
    Inventors: Seiichi Suzuki, Eihachiro Tomita
  • Electrode lead tab for capacitor
    Patent number: 4486810
    Abstract: An electrode lead tab for oil-impregnated capacitors having dielectric sheets and electrode foils laminated to each other, in which a plurality of cutting lines or rifts are provided to a tab main body, so that the tab main body can ensure a close electrical contact at a plurality of regions thereof to the electrode foils.
    Type: Grant
    Filed: August 30, 1983
    Date of Patent: December 4, 1984
    Assignees: Kureha Kagaku Kogyo Kabushiki Kaisha, Radio Research & Technical Incorporated
    Inventors: Eihachiro Tomita, Mitsuru Ota