Patents by Inventor Leslie Buckingham Norton

Leslie Buckingham Norton 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).

  • Machine tool guards
    Patent number: 4078451
    Abstract: A machine tool, such as a hydraulic press, has a movable guard to prevent the operator's hands from being present in the vicinity of the powered operating element, such as a press tool, while the machine is operating. The guard can be actuated automatically or manually by the operator and is connected to a dump valve in the hydraulic system so that power cannot be applied to the operating element at any time except when the guard is fully closed.
    Type: Grant
    Filed: December 3, 1976
    Date of Patent: March 14, 1978
    Inventors: Hubert Veare Norton, Leslie Buckingham Norton, Douglas Edwin Norton