Patents by Inventor John S. Lindsay

John S. Lindsay 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).

  • Electronic shearography apparatus for producing animation of shearogram images
    Patent number: 6433874
    Abstract: The invention relates to an apparatus for performing electronic shearography on a test object, especially a tire or retread tire. The apparatus uses a laser light source to illuminate the test object. An optical element through which electromagnetic radiation is reflected from the test object is transmitted and forms a random interference image. The random interference image is electronically processed to provide a video animation of the effects of stress on the test object.
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: August 13, 2002
    Assignee: Bandag Licensing Corporation
    Inventors: John S. Lindsay, Jason L. Gridley
  • Shearographic imaging machine
    Publication number: 20010021025
    Abstract: The invention relates to an apparatus for performing electronic shearography on a test object, especially a tire or retread tire. The apparatus uses a laser light source to illuminate the test object. An optical element through which electromagnetic radiation is reflected from the test object is transmitted and forms a random interference image. The random interference image is electronically processed to provide a video animation of the effects of stress on the test object.
    Type: Application
    Filed: April 16, 2001
    Publication date: September 13, 2001
    Inventors: John S. Lindsay, Jason L. Gridley
  • Method and apparatus for analyzing shearogram images by animation
    Patent number: 6219143
    Abstract: The invention relates to an apparatus for performing electronic shearography on a test object, especially a tire or retread tire. The apparatus uses a laser light source to illuminate the test object. An optical element through which electromagnetic radiation is reflected from the test object is transmitted and forms a random interference image. The random interference image is electronically processed to provide a video animation of the effects of stress on the test object.
    Type: Grant
    Filed: June 16, 1999
    Date of Patent: April 17, 2001
    Assignee: Bandag, Incorporated
    Inventors: John S. Lindsay, Jason L. Gridley
  • Belt pulley
    Patent number: 4979928
    Abstract: A pulley having a special outer contour particularly adapted to establish self aligning of narrow width belts rotating thereon. The outside diameter of the pulley is gradually crowned from each end with a more sharply crowned ridge located at the center intermediate the ends of the pulley to provide a compound crowned contour.
    Type: Grant
    Filed: September 14, 1989
    Date of Patent: December 25, 1990
    Assignee: The Pratt & Whitney Company, Inc.
    Inventor: John S. Lindsay
  • Automatic gauge control system for multi-stand tied block rod rolling mill
    Patent number: 4558576
    Abstract: The dimensions of a product passing through the finishing block of a roll rolling mill are measured. Where the dimensions of the product exiting the last finishing stand are out-of-tolerance, a calculation is made to determine the extent to which the roll parting of the work rolls of one of the two last finishing stands must be adjusted to bring the product into tolerance. Based on the calculated adjustment, progressively smaller adjustments are made to the roll partings of the work rolls of the upstream finishing stands to distribute the work which must be performed on the product to bring the product into tolerance.
    Type: Grant
    Filed: November 14, 1983
    Date of Patent: December 17, 1985
    Assignee: Morgan Construction Company
    Inventors: Richard J. Reardon, Endre S. Maroti, Colin Roy, John S. Lindsay