Patents by Inventor Henry Erskine

Henry Erskine 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 presser bar mechanism
    Patent number: 4058071
    Abstract: A low inertia presser bar system for a sewing machine has a short hollow presser bar including a light internal compression spring with an abutment member on top engaged in a depression in the underside of an arm of a fulcrumed bell-crank lever. An upper presser bar having a heavy spring is linked to the upper side of the same arm of the lever. A stop member is threaded into the head of the sewing machine to engage the other arm of the bell-crank lever to oppose and thereby limit the force of the upper spring and isolate the lower spring and presser bar until the lower spring is compressed solid.
    Type: Grant
    Filed: December 22, 1976
    Date of Patent: November 15, 1977
    Assignee: The Singer Company
    Inventors: Earl F. Dunn, Henry Erskine, Edward Hooper