Patents by Inventor Vernon Boyd

Vernon Boyd 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).

  • Resistance welding
    Patent number: 4079226
    Abstract: A method of controlling the duration of a resistance weld in which a preprogrammed AC current is fed to welding electrodes, the program including an abrupt increase in welding current after a predetermined number of cycles so that the weld duration can be extended into the high amplitude portion if the heat input has been insufficient. The voltage across the welding electrodes is monitored, the peak voltage detected, a reference voltage derived by dropping the peak voltage 2 - 20% and the weld terminated when the subsequent peaks fall to the reference voltage.
    Type: Grant
    Filed: November 1, 1976
    Date of Patent: March 14, 1978
    Assignee: The Welding Institute
    Inventors: Vernon Boyd, Keith I. Johnson, Malcolm D. Hannah, Timothy J. Jessop