Patents Assigned to Goro Eto
  • Light converting type detectors
    Patent number: 4253061
    Abstract: In a high voltage or current detector of the type utilizing an insulating tube, polarized light is directed to a photoelectric element mounted on the upper end or contained in the insulating tube so as to modulate the polarized light in accordance with the voltage or current to be measured. The modulated light is directed to a photosensitive element on the lower end of the tube for producing an electric signal which is applied to a meter for displaying the voltage or current.
    Type: Grant
    Filed: November 16, 1978
    Date of Patent: February 24, 1981
    Assignees: Goro Eto, Hideo Ohno
    Inventors: Toshiharu Ono, Sensaku Ikeda, Hideo Ohno
  • Method and apparatus for measuring electric quantities by using light converters
    Patent number: 4117399
    Abstract: To a light converter including an optical effect element is applied an electric input having an amplitude exceeding the linear region of the characteristic of the light converter. The number of the peaks of the output reaching a maximum amplitude is added to the magnitude of a peak of the output not reaching the maximum amplitude thereby measuring the magnitude of the input. Two or more light converters with differential or cumulative inputs may be used.
    Type: Grant
    Filed: March 30, 1977
    Date of Patent: September 26, 1978
    Assignees: Yutaka Ono, Yoichi Fuji, Goro Eto
    Inventors: Yutaka Ono, Yoichi Fujii, Koji Yokoyama, Toshifumi Igarashi