Patents by Inventor Donald L. A. Weston

Donald L. A. Weston 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).

  • Plasma welding
    Patent number: 4195216
    Abstract: In plasma welding apparatus controls are provided which regulate the rates of increasing and decreasing the welding parameters e.g., welding current, gas flow and wire feed to prevent the formations of craters in the weld at the end of a welding run. Improved welds are formed if the wire feed rate is increased prior to the start of the decrease in welding current but after the gas flow to the plasma arc has begun to decrease.
    Type: Grant
    Filed: March 13, 1978
    Date of Patent: March 25, 1980
    Assignee: Rolls-Royce Limited
    Inventors: Derek J. Beauchamp, Donald L. A. Weston