Patents by Inventor B. Ann Matthews

B. Ann Matthews 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).

  • Sewing machine having sewing forces measurement system
    Patent number: 4869187
    Abstract: A sewing machine having a presser bar and a needle bar and each having a force transducer mounted thereon for simultaneously detecting changes in load applied to the presser bar and needle bar. The force transducers are connected to a circuit including a computer for monitoring the fabric feeding and stitch formation forces encountered by the presser bar and the needle bar during sewing and analyzing the simultaneous force signal data from the force transducers on the needle bar and the presser bar of the sewing machine.
    Type: Grant
    Filed: June 29, 1988
    Date of Patent: September 26, 1989
    Assignee: North Carolina State University
    Inventors: Trevor J. Little, B. Ann Matthews