Patents by Inventor William Harvard Maddock

William Harvard Maddock 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).

  • Work handling apparatus for center drive lathe
    Patent number: 4064774
    Abstract: In a work handling apparatus for a center drive lathe having a center chuck and right hand and left hand turrets, the workpiece is accurately located with respect to the chuck, prior to machining, by means of a locating jig mounted on one of the turrets. The workpiece is carried between spring-biassed centers carried by the turrets, and is pushed axially against the weaker spring-bias of one of the centers until it abuts the locating jig, whereupon the chuck clamps the workpiece.
    Type: Grant
    Filed: December 8, 1976
    Date of Patent: December 27, 1977
    Assignee: Standard Modern Tool Company Limited
    Inventor: William Harvard Maddock