Patents by Inventor Hahiro Makabe

Hahiro Makabe 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).

  • Pulse motor driving device of sewing machines
    Patent number: 4368414
    Abstract: A pulse motor driving device for a pulse motor having a plurality of windings. A first plurality of switching elements is connected to a first pole of a D-C power supply and to a connecting means for providing a connection to the windings of the pulse motor and to a second plurality of switching elements. The second pole of the D-C power supply is connected to the second plurality of switching elements. A plurality of diodes is connected to the connection means and to one of the poles of the D-C power supply. A capacitor is connected between one of the plurality of switching means and the D-C power supply. A comparison signal generator can be connected to the first plurality of switching elements, a reference voltage generator can be connected to the comparison signal generator and current detectors can be connected between the second plurality of switching elements and the D-C power supply.
    Type: Grant
    Filed: January 10, 1980
    Date of Patent: January 11, 1983
    Assignee: Janome Sewing Machine Co., Ltd.
    Inventors: Kazuo Watanabe, Hahiro Makabe