Patents by Inventor Yasushi Endou

Yasushi Endou 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).

  • Electrical discharge machine with machining gap voltage control
    Patent number: 5233148
    Abstract: In an electrical discharge machining apparatus, the average machining gap voltage is controlled to be a predetermined value even if a discharging operation is interrupted. This is accomplished by providing a bypass circuit or an inverse voltage providing circuit that responds to an interruption in the discharging operation. By controlling the average machining gap voltage, electrolytic corrosion and magnetization of the workpiece is minimized.
    Type: Grant
    Filed: November 27, 1991
    Date of Patent: August 3, 1993
    Assignee: Mitsubishi Denki K.K.
    Inventors: Takuji Magara, Hisashi Yamada, Yasushi Endou
  • Pyroelectric infrared temperature compensated detector
    Patent number: 4792682
    Abstract: A pyroelectric infrared detector or infrared ray receiving element comprising a plurality of pyroelectric operating areas, utilizing one of the operating areas as an infrared radiation detection area having a light-transmissive surface electrode. The electrical signal produced in the signal detection area is compensated by an electrical signal produced in another pyroelectric operating area having a light-reflective surface electrode. Temperature drift and noise due to vibration are drastically reduced through the compensation.
    Type: Grant
    Filed: July 21, 1986
    Date of Patent: December 20, 1988
    Assignee: Kureha Kaqaka Koqyo Kabushiki Kaisha
    Inventors: Yasushi Endou, Hisao Takahashi, Tetsuaki Kon