Patents by Inventor Satoshi Tanisaka

Satoshi Tanisaka 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).

  • Spark monitor device for current collectors
    Patent number: 4577151
    Abstract: A spark monitor device arranged to detect a high frequency noise due to a spark generated in a current collector of a rotary electric machine and monitor a state of spark generation on the basis of the product of a peak value of the high frequency noise exceeding a given set value and a time interval during which the peak value exceeds the set value.
    Type: Grant
    Filed: July 12, 1982
    Date of Patent: March 18, 1986
    Assignee: Hitachi, Ltd.
    Inventors: Satoshi Tanisaka, Yoshihiro Michiguchi
  • Frequency spectrum variation monitoring system
    Patent number: 4303979
    Abstract: In a frequency spectrum variation monitoring system, the values of two parameters including the root mean square (RMS) value of each of the output signals from various detectors disposed at several locations in a nuclear power plant and the RMS value of the time-differentiated version of the detector output signal are calculated both at the normal state and at any time instant. These parameter values are used to obtain the RMS value of the deviation of the frequency spectrum of the detector output signal from the normal state and the average frequency weighted with that frequency spectrum deviation, so that the geometrical variation in frequency spectrum of the detector output signal may be monitored.
    Type: Grant
    Filed: April 17, 1978
    Date of Patent: December 1, 1981
    Assignee: Hitachi, Ltd.
    Inventors: Kanji Kato, Satoshi Tanisaka