Patents by Inventor Tadayoshi Yoshida

Tadayoshi Yoshida 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).

  • Radioactive dust monitor
    Patent number: 6700125
    Abstract: A radioactive dust monitor comprising a dust collecting electrode serving also as a radiation detecting surface, an ionization line extending in air in a spaced relation with the dust collecting electrode and a radiation detection part. The radiation detection part is provided with a scintillator disposed close to said dust collecting electrode and a photoelectric conversion part converting light emitted from the scintillator into an electric signal. Dust in air is collected by the dust collecting electrode due to a corona discharge which is generated by applying a negative high voltage to the ionization line and by applying a positive high voltage to the dust collecting electrode, and light emitted from the scintillator due to radioactive rays radiated from the collected radioactive dust is detected by the photoelectric conversion part.
    Type: Grant
    Filed: November 2, 2001
    Date of Patent: March 2, 2004
    Assignee: Japan Nuclear Cycle Development Institute
    Inventors: Yasuhisa Ito, Kenji Izaki, Tadayoshi Yoshida
  • Radioactive dust monitor
    Publication number: 20030183769
    Abstract: A radioactive dust monitor comprising a dust collecting electrode serving also as a radiation detecting surface, an ionization line extending in air in a spaced relation with the dust collecting electrode and a radiation detection part. The radiation detection part is provided with a scintillator disposed close to said dust collecting electrode and a photoelectric conversion part converting light emitted from the scintillator into an electric signal. Dust in air is collected by the dust collecting electrode due to a corona discharge which is generated by applying a negative high voltage to the ionization line and by applying a positive high voltage to the dust collecting electrode, and light emitted from the scintillator due to radioactive rays radiated from the collected radioactive dust is detected by the photoelectric conversion part.
    Type: Application
    Filed: November 2, 2001
    Publication date: October 2, 2003
    Inventors: Yasuhisa Ito, Kenji Izaki, Tadayoshi Yoshida