Patents Assigned to Keith A. Tidball
  • Electronic cattle guard
    Patent number: 4503399
    Abstract: Livestock entering a border zone along a vehicle roadway are deterred by sequentially activated horn, smoke generating and odor emitting devices triggered in response to interruption of one photo-electric beam at that end of the zone from which the cattle enter. Travel of a vehicle through the zone sequentially interrupts the two beams at opposite ends of the zone to reset the deterring apparatus and cancel its operation.
    Type: Grant
    Filed: January 5, 1983
    Date of Patent: March 5, 1985
    Assignee: Keith A. Tidball
    Inventor: Jay R. Carr