Patents by Inventor Colin George Langworthy

Colin George Langworthy 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).

  • Coarse/fine sheeter controls in particular and machine drive systems in general
    Patent number: 3983467
    Abstract: A machine drive system includes two motors which are to be driven with a selected velocity ratio. To one of these motors a coarse control is applied, and which the velocity ratio approximates the desired value, a fine control is applied to the other motor. The system may be hydraulic or electric. The hydraulic version employs a single pump to drive the two motors, and the fine control is conveniently a valve in a fluid line bypass around the associated motor. An error signal obtained from a comparison of the two speeds is used to govern the coarse/fine control.
    Type: Grant
    Filed: November 15, 1974
    Date of Patent: September 28, 1976
    Assignee: Masson Scott Thrissell Engineering Limited
    Inventors: Walter Howard Bossons, Colin George Langworthy