Patents by Inventor Duane L. Kirschenman

Duane L. Kirschenman 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).

  • Patent number: 4516318
    Abstract: A pair of spaced holes (32 and 34) are drilled in a substrate blank (10) diametrically along a line (14) defining a future locating edge (22) of a printed circuit board (12). When the substrate blank (10) is then sheared to form the printed circuit board (12), semi-circular recesses (38 and 40) are formed from the spaced holes (32 and 34) in the resultant board locating edge (22). The printed circuit board (12) then is accurately aligned in a processing station in X- and Y-directions by seating board-locating pins (50 and 52) of special configurations in respective ones of the semi-circular recesses (38 and 40).
    Type: Grant
    Filed: April 26, 1983
    Date of Patent: May 14, 1985
    Assignee: AT&T Technologies, Inc.
    Inventor: Duane L. Kirschenman
  • Patent number: 3993108
    Abstract: A component lead forming tool, having inside and outside lead formers, is provided with resilient "O" ring assemblies which permit horizontal lateral movement of the inside formers relative to the outside formers to allow leads of different lead diameters to be accurately formed. Each of the outside formers is formed with a longitudinal slot the depth of which equals the diameter of the smallest lead to be formed and received in the slot during a forming operation. The outside formers are movable vertically adjacent to the inside formers to bend and form the component lead over the inside formers. Horizontal lateral movement of the inside formers by virtue of the resiliency of the "O" rings permits a temporary increase in the distance between cooperating outside and inside formers when the diameter of the component lead to be formed is greater than the depth of the slot in each of the outside formers.
    Type: Grant
    Filed: December 3, 1975
    Date of Patent: November 23, 1976
    Assignee: Western Electric Company, Inc.
    Inventors: Duane L. Kirschenman, Terrell M. Shoffner