Patents Assigned to NDT Systems, Inc.
  • Pipe inspection systems
    Patent number: 4187425
    Abstract: The disclosed invention involves radioactive inspection of tubular pipe passed rotatively and longitudinally relative to an inspection head. A beam of radiation is directed so as to intersect the pipe along a chord where the intersection is spaced a distance "d" on a horizontal radius from the pipe axis, the distance "d" being approximately 0.6 of the radius of the outer pipe wall. A diametrical beam of radiation can be used for comparison purposes.
    Type: Grant
    Filed: April 14, 1978
    Date of Patent: February 5, 1980
    Assignee: NDT Systems, Inc.
    Inventor: Carroll R. Thompson