Patents by Inventor Thomas A. Field

Thomas A. Field 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).

  • Surface alloying apparatus including safety circuit
    Patent number: 4205211
    Abstract: An improved apparatus for alloying a surface of a workpiece of the type in which an electrode, formed of the alloying material, is connected to a pulse generating machine which creates repetitive spark discharges between the electrode and the workpiece when the electrode is in engagement with the workpiece, the improvement being a safety circuit which prevents energization of the electrode until it is engaged with the workpiece.
    Type: Grant
    Filed: November 23, 1977
    Date of Patent: May 27, 1980
    Assignees: Alloying Surfaces, Inc., Richard A. Serlin
    Inventors: Richard A. Serlin, Thomas A. Field