Patents by Inventor John Wesley Allen

John Wesley Allen 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).

  • Position sensing device for sewing instrumentality actuator
    Patent number: 3976019
    Abstract: A sewing machine is disclosed having electromechanical actuators for controlling the stitch forming instrumentalities in the formation of stitch patterns with a non-contact position sensing device associated with each electromechanical actuator comprising spaced coils and a metallic shunt plate arranged adjacent and shiftable relatively to the coils in response to movement of the actuator to produce a measureable variation in the inductance of the coils which bears an advantageous linear relationship to the electromechanical actuator position.
    Type: Grant
    Filed: October 30, 1974
    Date of Patent: August 24, 1976
    Assignee: The Singer Company
    Inventors: John Wesley Allen, William P. Waiwood