Patents by Inventor Ferdinand P. Oliva

Ferdinand P. Oliva 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).

  • Arrangement for signaling presser bar position
    Patent number: 4459927
    Abstract: An arrangement for changing the condition of an electrical circuit path when the presser bar lifter is pivoted to lift the presser bar uses a modified thread tension release cam which pivots with the presser bar lifter and a contact strip which is adapted to contact the cam when the presser bar is raised.
    Type: Grant
    Filed: December 12, 1983
    Date of Patent: July 17, 1984
    Assignee: The Singer Company
    Inventors: Marvin Kurland, Ferdinand P. Oliva, Terry L. Wilson
  • Buttonhole presser device for sewing machines
    Patent number: 4409913
    Abstract: A buttonhole presser device includes electrical switch contact members which cooperate with adjustable contact closing members to close an electrical circuit path. The switch contact members are carried by the shank of the presser device and are arranged so that when the presser device is installed on the presser bar one of the switch contact members is in electrical contact with the presser bar and the other switch contact member is in electrical contact with a conductor. The presser bar and the conductor are electrically connected to an electrical control circuit within the sewing machine.
    Type: Grant
    Filed: August 25, 1982
    Date of Patent: October 18, 1983
    Assignee: The Singer Company
    Inventors: Kenneth D. Adams, Marvin Kurland, Richard Mead, Ferdinand P. Oliva, Terry L. Wilson