Patents by Inventor Mitsui Tadashi

Mitsui Tadashi 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).

  • Structure of a transformer
    Patent number: 4394636
    Abstract: A transformer having a main winding and a control winding has a pair of E-shaped cores (10, 11), and an I-shaped third core (13) positioned on one E-shaped core (10). A small groove (14) is provided on the base plate (10c) of the first E-shaped core (10). A control winding (12) is wound on the I-shaped core (13) so that the winding (2) rests in the groove 14. Those cores (10, 11, 13) are made of ferrite material. Thus, both the main winding and the control winding can be produced using a winding machine.
    Type: Grant
    Filed: May 1, 1981
    Date of Patent: July 19, 1983
    Assignee: TDK Electronics Co., Ltd.
    Inventors: Imaizumi Hiraku, Mitsui Tadashi