Patents by Inventor Shosaku Maeda

Shosaku Maeda 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).

  • Patent number: 5230245
    Abstract: A flow meter is provided which employs a thermal flow sensor and a correcting flow meter, for example, a Karman vortex flow meter such that the output from the thermal flow sensor is corrected by the Karman vortex flow meter, thereby making it possible to accurately and stably measure the flow rate of fluids in a wide range even if the composition of fluids changes.
    Type: Grant
    Filed: July 1, 1991
    Date of Patent: July 27, 1993
    Assignee: Yamatake-Honeywell Co., Ltd.
    Inventors: Shoji Kamiunten, Shigeru Aoshima, Shosaku Maeda
  • Patent number: 5130775
    Abstract: In this sensitive, relatively inexpensive to manufacture, photo-detector, one surface of an amorphous silicon photovoltaic element is bonded to a thin transparent conductive layer formed on an insulating base. A conductive pattern is formed on the opposite surface of the element. The conductive layer may be formed of indium-tin oxide (ITO) and the photovoltaic element may be an element with an intrinsic semiconducting layer between p and n doped layers. The photovoltaic element generates component currents in response to photons passing through the transparent base and conducting layer. Those current components flowing predominantly in a direction at right angles to the photovoltaic element surfaces are summed by the conductive pattern which acts as a spatial filter, responsive to desired ones of these components and relatively unresponsive to other current components.
    Type: Grant
    Filed: June 18, 1990
    Date of Patent: July 14, 1992
    Assignee: Yamatake-Honeywell Co., Ltd.
    Inventors: Shosaku Maeda, Takeshi Kawai, Fumio Koike
  • Patent number: 4825704
    Abstract: A fluid flow speed measuring apparatus comprising a first pipe having an opening exposed into a fluid to be measured, a direction of the opening having an angle larger than a critical negative pressure angle, a second pipe having an opening exposed into the fluid to be measured, a direction of the opening of the second pipe having an angle larger than the critical negative pressure angle and at least one of conditions such as a diameter, a direction, and the number of the openings for determining a magnitude of the negative pressure being different from that of the opening of the first pipe, negative pressure difference detector for detecting a difference between negative pressures acting on the openings of the first and second pipes, and device for calculating a flow speed of the fluid to be measured on the basis of an output from the negative pressure difference detector.
    Type: Grant
    Filed: August 24, 1987
    Date of Patent: May 2, 1989
    Assignee: Yamatake-Honeywell Co., Ltd.
    Inventors: Shigeru Aoshima, Shoji Kamiunten, Shosaku Maeda
  • Patent number: 4329874
    Abstract: A calorimetric apparatus for determining the calorific content of a fuel gas uses a reactor for producing oxidation of the fuel gas and a combustion gas in the presence of a catalytic oxidizer. The catalytic oxidizer is mounted on one end of a thermo-electric element which element has a heat absorbing end and a heat emitting end when energized by an electric current to produce a Peltier effect. The catalytic end of the element is mounted within the reactor while the other end is located outside of the reactor. The temperatures of the ends of the element are detected by a controller and the difference therebetween is maintained at a predetermined level during the catalytic reaction by the controller developing a control signal to control the supply of the electric current to the element. A display control signal is derived from the control signal by the controller and used to control a display for indicating the calorific content of the fuel gas.
    Type: Grant
    Filed: November 19, 1980
    Date of Patent: May 18, 1982
    Assignee: Honeywell Inc.
    Inventor: Shosaku Maeda
  • Patent number: 4329873
    Abstract: A calorimetric apparatus for determining the calorific content of a fuel gas uses a reactor for producing oxidation of the fuel gas and a combustion gas in the presence of a catalytic oxidizer. The oxidizer is heated by a constant current supply to a catalytic oxidation temperature. The resistance of the catalytic device is measured before and during the oxidation reaction which produces an additional heating of the catalytic device. The change in resistance is used to control a valve arranged to determine the flow rate of the fuel gas to the reactor. A display control signal is derived from a valve control signal and used to control a display for indicating the calorific content of the fuel gas.
    Type: Grant
    Filed: November 19, 1980
    Date of Patent: May 18, 1982
    Assignee: Honeywell Inc.
    Inventor: Shosaku Maeda