Patents by Inventor Basil A. Decina, Jr.

Basil A. Decina, Jr. 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).

  • Method and apparatus for detecting the onset of melting in a resistance spot weld
    Patent number: 4503311
    Abstract: During a weld period the weld parameters are monitored and data representing the weld resistance curve and the power curve are acquired and stored for analysis by a suitably programmed computer. The derivative of R, R is calculated and stored and the function is divided by power P to obtain R/P. The resistance curve is searched to obtain the maximum value R.sub.m which occurs during the heating phase and the function R/P is searched prior to the time of R.sub.m to find the maximum of that curve representing the highest rate of resistance increase. Then the R/P curve is searched subsequent to its maximum to determine when the function reaches a specified percentage of the maximum. That value occurs at the knee of the resistance curve and approximates the onset of melting in the weld.
    Type: Grant
    Filed: May 25, 1983
    Date of Patent: March 5, 1985
    Assignee: General Motors Corporation
    Inventors: Albert F. Houchens, Basil A. Decina, Jr., James R. Havens, Dixon Cleveland, Gregory L. Nagel
  • Method and apparatus for predicting and controlling the quality of a resistance spot weld
    Patent number: 4493965
    Abstract: During a weld period the weld parameters are monitored and data representing the weld resistance curve and the power curve are acquired and stored for analysis by a suitably programmed computer. The derivative of R, R is calculated and stored and the function is divided by power P to obtain R/P. The resistance curve is searched to obtain the maximum value R.sub.m which occurs during the heating phase and the function R/P is searched prior to the time of R.sub.m to find the maximum of that curve representing the highest rate of resistance increase. Then the R/P curve is searched subsequent to its maximum to determine when the function reaches a specified percentage of the maximum. That value occurs at the knee of the resistance curve and approximates the onset of melting in the weld.
    Type: Grant
    Filed: May 25, 1983
    Date of Patent: January 15, 1985
    Assignee: General Motors Corporation
    Inventors: Albert F. Houchens, Dixon Cleveland, Basil A. Decina, Jr., Dale K. Watney, James R. Havens, Gregory L. Nagel
  • Method and apparatus for detecting edge welds during resistance spot welding
    Patent number: 4477709
    Abstract: During a weld period the weld parameters are monitored and data representing the weld resistance curve and the power curve are acquired and stored for analysis by a suitably programmed computer. The derivative of R, R is calculated and stored and the function is divided by power P to obtain R/P. The resistance curve is searched to obtain the maximum value R.sub.m which occurs during the heating phase and the function R/P is searched prior to the time of R.sub.m to find the maximum of that curve representing the highest rate of resistance increase. Then the R/P curve is searched subsequent to its maximum to determine when the function reaches a specified percentage of the maximum. That value occurs at the knee of the resistance curve and approximates the onset of melting in the weld.
    Type: Grant
    Filed: May 25, 1983
    Date of Patent: October 16, 1984
    Assignee: General Motors Corporation
    Inventors: Dixon Cleveland, James R. Havens, Gregory L. Nagel, Basil A. Decina, Jr., William C. Jenuwine