Patents by Inventor Carl W. Lesser

Carl W. Lesser 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).

  • Stud welding
    Patent number: 5317124
    Abstract: Method and apparatus for automatically compensating for spring fatigue and aging, mechanical wear, and the like in a stud welding machine. In order to hold plunge time at an ideal constant value, the plunge times of each weld are measured and a running average is generated to adjust the command to drop the stud onto the workpiece as necessary to hold plunge time substantially at the ideal constant value.
    Type: Grant
    Filed: July 12, 1993
    Date of Patent: May 31, 1994
    Assignee: Emhart Inc.
    Inventors: Carl W. Lesser, Earl J. Schnur