Patents by Inventor John Charles De Fellippie

John Charles De Fellippie 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).

  • Multi-mode structural weld monitor on a time base
    Patent number: 4028522
    Abstract: To provide a plurality of different weld quality indicators in resistance, projection and forge welding, the varying separation of two electrodes during a plurality of different time brackets defined within a weld cycle is measured. At least one interval timer is used to define such time brackets. These weld quality indicators include the surface resistance of the workpieces, the melting rate, the maximum expansion, the expansion rate, the weld size, the forge force, the set-down rate, etc.
    Type: Grant
    Filed: April 29, 1975
    Date of Patent: June 7, 1977
    Assignee: Martin Marietta Corporation
    Inventors: Russell Alexander Chihoski, John Charles De Fellippie