Patents by Inventor Richard Gordon Stewart

Richard Gordon Stewart 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).

  • Method and apparatus for spinning yarns on open-end spinning machines and pneumatically removing fiber and trash waste incident to spinning
    Patent number: 3953961
    Abstract: A method and apparatus for removing fiber waste from yarn spinning rotors of open-end spinning machines and for removing trash waste liberated from fibers in their paths of travel to the respective rotors, utilizing a common primary airflow for drawing air from the rotors and for also drawing air adjacent the paths of travel of the fibers to the rotors so that the airflow adjacent such paths of travel will not interfere with movement of the fibers along such paths to the adjacent yarn spinning rotors. Preferably, the airflow from the rotors of each machine passes through a respective movable filter arranged to arrest fiber waste thereon periodically for intervals of predetermined duration permitting extinguishing of any fire which may have been ignited in the fiber waste being drawn from the rotors of the machines.
    Type: Grant
    Filed: July 5, 1974
    Date of Patent: May 4, 1976
    Assignee: Parks-Cramer (Great Britain), Ltd.
    Inventors: John Harrap, Richard Gordon Stewart