Patents Assigned to The United States of America as represented by the Secretary of the Department of Transporation
  • Automated gain control in rail flaw detection
    Patent number: 4205553
    Abstract: Automated gain control in rail flaw detection which includes attenuation of echoes from rails pulsed with a burst of sonic energy, comparing said attenuated signals over discrete intervals, and reducing or increasing said attenuation in response thereto to develop a uniform signal from which an evaluation of flaw indicating echoes can be obtained.
    Type: Grant
    Filed: February 21, 1979
    Date of Patent: June 3, 1980
    Assignee: The United States of America as represented by the Secretary of the Department of Transporation
    Inventors: Robert P. Rudis, Harry L. Ceccon