Patents by Inventor Taro Sometani

Taro Sometani 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).

  • Zero-phase-sequence voltage sensing apparatus
    Patent number: 4879509
    Abstract: This invention relates to a voltage sensor for sensing a voltage on an electrically charged object such as a distribution line or the like, the sensor being disposed with an insulation space to the object. The voltage sensor includes an amplifier circuit for outputting a signal having a waveform similar to that of a displacement current inflowing from the electrically charged object via the insulation space, and a filter circuit for extracting a signal having predetermined frequencies from the output of the amplifier circuit and outputting an alternating current waveform similar to the potential of the electrically charged object.
    Type: Grant
    Filed: October 24, 1988
    Date of Patent: November 7, 1989
    Assignee: Energy Support Corporation
    Inventors: Taro Sometani, Naotoshi Takaoka, Mitsuo Aida, Mitsuharu Kudomi, Yasuhiro Tanahashi, Katsunori Aoki
  • Voltage sensor
    Patent number: 4804922
    Abstract: This invention relates to a voltage sensor for sensing a voltage on an electrically charged object such as a distribution line or the like, the sensor being disposed with an insulation space to the object. The voltage sensor includes an amplifier circuit for outputting a signal having a waveform similar to that of a displacement current inflowing from the electrically charged object via the insulation space, and a filter circuit for extracting a signal having predetermined frequencies from the output of the amplifier circuit and outputting an alternating current waveform similar to the potential of the electrically charged object.
    Type: Grant
    Filed: October 27, 1986
    Date of Patent: February 14, 1989
    Assignee: Energy Support Corporation
    Inventors: Taro Sometani, Naotoshi Takaoka, Mitsuo Aida, Mitsuharu Kudomi, Yasuhiro Tanahashi, Katsunori Aoki