Patents by Inventor Joseph Freeman Spangler, III

Joseph Freeman Spangler, III 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: 6503163
    Abstract: The precision cable drive system of the present invention consists generally of a frame upon which is mounted the components of the drive. These include a motor having a drive shaft, a plurality of idler pulleys, a tensioner, and a drive pulley, to which the object being rotated is connected. A cable composed of woven polymer fibers is wrapped around the shaft of the motor and is stretched around the idler pulleys, the tensioner and the drive pulley. The drive is capable of rotating the drive pulley, and the load attached to it, by fractions of a degree, without play between the motor shaft and the drive pulley. The drives are used in a compact image steering device to rotate cameras and illuminators about two axis of rotation.
    Type: Grant
    Filed: December 20, 1999
    Date of Patent: January 7, 2003
    Assignee: Sensar, Inc.
    Inventors: Glen Van Sant, Christopher John Killion, Joseph Freeman Spangler, III