Patents Assigned to Mitsuhiro Yamada
  • Automatic analyzer for combustible gas in oil
    Patent number: 4310487
    Abstract: An automatic analyzer for measuring a combustible gas dissolved in an oil such as an insulating oil in a transformer includes a gas desorbing device, a gas discharger and a combustible gas detector. The oil is sampled and the gas dissolved in the oil is desorbed by bubbling air and a mixed gas of the desorbed gas and air is fed into a bellows type gas discharger and the concentration of the combustible gas is measured by the combustible gas detector.
    Type: Grant
    Filed: March 26, 1980
    Date of Patent: January 12, 1982
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Mitsuhiro Yamada, Hirokazu Katayama
    Inventors: Mitsuhiro Yamada, Hirokazu Katayama, Toshitsugu Ishii, Yoshihiro Makino, Masashi Kamio