Patents by Inventor Alfred J. Zenger

Alfred J. Zenger 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: 4104976
    Abstract: A programmable industrial sewing machine adapted to learn and store, in Automatic Learn or Key Learn Modes of operation, a series of sewing machine operations for later automatic duplication. In both modes of operation provision is made for an operator to select the number of initial and final locking stitches prior to commencing stitching operations. Operator actuated controls, such as knee shift device and foot treadle, operate identically in both Learn Modes of operation and as they would operate in a normal manual industrial sewing machine. In the Automatic Learn Mode of operation, a record is compiled in segments, consisting each of a stitch count, a pivot delay time, and a speed copy. In appropriate circumstance, the pivot delay time may be zero.
    Type: Grant
    Filed: March 21, 1977
    Date of Patent: August 8, 1978
    Assignee: The Singer Company
    Inventors: John V. Landau, Jr., Barney D. Hunts, Frederick A. Rupinski, Alfred J. Zenger