Patents by Inventor William D. Roberts

William D. Roberts 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).

  • Motion board drive system with self alignment
    Patent number: 4771558
    Abstract: A logic control linear drive magnetic motor is used to reciprocate approximately 180.degree. flat panels which make a display board. Each panel of the display board is connected to a pulley which is in a plane perpendicular to the longitudinal dimension of the vane. A continuous drive cord is connected to each end of a shuttle cylinder of the motor and is wrapped around the pulley drum. The pulley drum is provided with self-alignment by providing slippage between a plate connected to the vane and the drum proper.
    Type: Grant
    Filed: February 4, 1987
    Date of Patent: September 20, 1988
    Inventors: William D. Roberts, Graham M. Stopford
  • Motion board drive system
    Patent number: 4759140
    Abstract: A logic control linear drive magnetic motor is used to reciprocate approximately 180.degree. the flat panels which make a display board. Each panel of the display board is connected to a pulley which is in a plane perpendicular to the longitudinal dimension of the vane. A continuous drive cord is connected to each end of a shuttle cylinder of the motor and is wrapped around the pulley drum. Movement of the shuttle cylinder moves the drive cord which controls the rotation of the vanes.
    Type: Grant
    Filed: August 6, 1986
    Date of Patent: July 26, 1988
    Assignee: Edward J. Moen
    Inventors: William D. Roberts, Graham M. Stopford