Patents by Inventor Beatty Thomas Mitchell

Beatty Thomas Mitchell 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).

  • Rotary hook sewing machine
    Patent number: 4009670
    Abstract: In a rotary hook, lockstitch, stationary bobbin case sewing machine, a bobbin is mounted on a bobbin ejector carried on the center post of an open ended bobbin case. A thread tensioner is attached to the outside of the bobbin case. Illumination is provided and the thread supply can be viewed at any time through a magnifying window and the exposed flange of the bobbin. Release of a latch on the center post permits removal and replacement of the bobbin without detaching any other part.
    Type: Grant
    Filed: November 24, 1975
    Date of Patent: March 1, 1977
    Inventor: Beatty Thomas Mitchell