Patents by Inventor Shigenori Hotta

Shigenori Hotta 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).

  • Power breaker apparatus
    Patent number: 4272750
    Abstract: A power breaker apparatus comprises a permanent fuse and resistors connected in parallel to the permanent fuse through a connecting conductor and is connected between a power source and a load to break a current supply to the load when a fault current is passed. At least external surfaces of the parallel resistors near the connecting parts of the connecting conductor are coated by an insulating coat.
    Type: Grant
    Filed: October 17, 1978
    Date of Patent: June 9, 1981
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Shigenori Hotta, Sadaaki Baba
  • Power breaker system
    Patent number: 4240123
    Abstract: A power breaker system comprises a main breaker connected to a power source; a plurality of feeder circuit breakers; a long-timing breaking delay circuit and a short-timing breaking delay circuit for delaying the total breaking time by a trip mechanism of the main breaker; and a current limiting circuit for limiting the fault current.
    Type: Grant
    Filed: December 8, 1978
    Date of Patent: December 16, 1980
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Shigenori Hotta
  • Current limiting apparatus
    Patent number: 4216456
    Abstract: A current limiting apparatus comprises a current limiter and cooling fins formed on each current terminal of the current limiter, and additional cooling fins fitted on a cylindrical tube of the current limiter near a heat generating source.
    Type: Grant
    Filed: October 18, 1978
    Date of Patent: August 5, 1980
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Shigenori Hotta, Sadaaki Baba, Masaru Takahashi