Patents by Inventor Ryan P. Dougall

Ryan P. Dougall 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: 4969360
    Abstract: A system for determining the rotational, or cyclic, speed and rotational position of a looped traveling belt, such as a felt in a papermaking machine, utilizes a discontinuity, or caliper variation, in the surface of the belt near one edge thereof. A fluid stream, such as compressed air, is projected against the web along the annnular area containing the discontinuity, and a pressure transducer is mounted to fixed proximity with the belt downstream of, and aligned with, the fluid stream. The transducer senses differences in the pressure of the fluid stream projected against the belt and against the discontinuity, and produces a signal indicative of the passage of the discontinuity past the transducer. The time interval of this signal is used to compute the cyclic speed of the traveling belt and to identify the part of the belt passing through a nipped roll couple at another location.
    Type: Grant
    Filed: October 2, 1989
    Date of Patent: November 13, 1990
    Assignee: Beloit Corporation
    Inventor: Ryan P. Dougall