Patents by Inventor Ronald G. Birkhamshaw

Ronald G. Birkhamshaw 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).

  • Patent number: 4174670
    Abstract: A linking machine is provided having a plurality of extending points onto which pieces of fabric to be joined are threaded. The linking machine consists of a linking station, a cutting station, and an over-sew station. The linking station has one needle and may have a pair of needles which operate to link pieces of fabric together by a single thread chain stitch, thereafter, the fabric which has heretofore been threaded on points of the dial is presented to a cutter at the cutting station which removes surplus fabric on the exposed fabric side of the linking thread whereupon the fabric remaining on the points is presented to the over-sew station having a needle which pierces the fabric then withdraws then returns over the edge of the fabric, each time being wrapped with the thread by thread guides whereupon an over-sew stitch over the edge of the fabric is formed.
    Type: Grant
    Filed: June 6, 1977
    Date of Patent: November 20, 1979
    Assignee: Mathbirk, Limited
    Inventor: Ronald G. Birkhamshaw