Patents by Inventor Tsunemi Mitsui

Tsunemi Mitsui 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).

  • Speed regulating devices for rotary machines or the like
    Patent number: 4015180
    Abstract: A first physical quantity derived from a detector coupled to a rotary machine is combined with a first reference physical quantity to produce a rectangular waveform signal with an amplitude which changes in response to the variation in supply voltage. The rectangular waveform signal is converted into a second physical quantity and is compared with a second reference physical quantity derived by the division of a supply voltage to produce control signals for rotating the rotary machine at a predetermined rate.
    Type: Grant
    Filed: February 21, 1975
    Date of Patent: March 29, 1977
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshio Tetsugu, Tsunemi Mitsui, Hiroshi Minakuchi
  • Speed detector for use with miniature DC motor
    Patent number: 3967200
    Abstract: A speed detector for use with a miniature DC motor is disclosed wherein a device such as coils or Hall generators for detecting the magnitude and direction of leakage flux are placed in opposed relationship with at least one pair of field poles of the DC motor, so that an output signal having a frequency proportional to an integral multiple of the number of slots of the armature may be derived.
    Type: Grant
    Filed: October 15, 1974
    Date of Patent: June 29, 1976
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshio Tetsugu, Tsunemi Mitsui, Hiroshi Minakuchi