Patents by Inventor David W. Capson

David W. Capson 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).

  • Automatic visual measurement of surface mount device placement
    Patent number: 4941256
    Abstract: A method for inspecting the placement and alignment of surface mounted components on printed circuit boards during assembly. After the component is placed on the board, an infrared camera provides an image of leads on the component and corresponding soldering pads, to which the leads are to be soldered, on the board in a single exposure. The image is then processed by a computer and the position and orientations of the leads of the component with respect to the soldering pads are determined. As a result, any unsatisfactory misalignment of the component can be detected and defective printed circuit boards identified.
    Type: Grant
    Filed: July 19, 1989
    Date of Patent: July 17, 1990
    Assignee: Canadian Patents & Development Ltd.
    Inventors: David W. Capson, Randy Tsang