Patents by Inventor Earl E. Johnson

Earl E. Johnson 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).

  • Tool support for tool interchange system
    Patent number: 4053968
    Abstract: A machine tool having automatic tool changing apparatus including a tool storage magazine formed with a plurality of circumferentially spaced socket recesses each having a generally U-shaped tool support shoe that is adapted to be broken away from the magazine to prevent damage to the tool changing apparatus in the event of unintended overtravel of the tool transfer mechanism at the magazine during a tool change operation. Limit switch means are provided for interrupting the feed drive of the machine in the event of such unintended overtravel of the tool transfer mechanism.
    Type: Grant
    Filed: August 6, 1975
    Date of Patent: October 18, 1977
    Assignee: Giddings & Lewis, Inc.
    Inventors: Earl E. Johnson, Calvin Gladoske