Patents by Inventor Ulrich Schmedtkord

Ulrich Schmedtkord 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).

  • Thread guiding system for sewing machine bobbin winders
    Patent number: 4211373
    Abstract: A thread guiding system for sewing machine bobbin winders in which the last thread constraining eyelet is positioned laterally centrally of the bobbin spindle and a plurality of smooth surface guide pins are positioned between the thread constraining eyelet and the bobbin with the axis of each pin parallel to that of the bobbin spindle. The pins exert no lateral influence on the thread which is allowed to move freely along the pins. With this construction the distance from the last thread constraining position to the bobbin is greatly reduced from that normally required for smoothly winding thread uniformly about the bobbin.
    Type: Grant
    Filed: January 22, 1979
    Date of Patent: July 8, 1980
    Assignee: The Singer Company
    Inventors: Reinhold Papajewski, Helmar Holl, Ulrich Schmedtkord