HAROLD PAUL JOHNSON
Engineers in Verona, PA

4955235, Sep 11, 1990

Jun 23, 1989

7/369725

Michael J. Metala - Murrysville PA
William G. Clark - Murrysville PA
Warren R. Junker - Monroeville PA
Lee W. Burtner - Elizabeth Township, Allegheny County PA
Thomas E. Arzenti - Greensburg PA
Harold P. Johnson - Verona PA
Robert P. Vestovich - Monroeville PA
Bruce W. Bevilacqua - Irwin PA

Westinghouse Electric Corp. - Pittsburgh PA

G01N 2900

73601

Both an apparatus and a method for simultaneously inspecting the walls of a tube with both ultrasonic and eddy current probes is disclosed herein. The apparatus generally comprises a cylindrical housing assembly insertable within the tube to be inspected, and a probe carrier rotatably mounted within and helically movable with respect to the housing. The probe carrier holds three ultrasonic probes for transmitting ultrasonic beams which are directly oriented radially, chordally, and axially with resepect to the longitudinal axis of the tube, as well as an eddy current probe for simultaneously inspecting the walls of the tube with electromagnetic lines of flux. The apparatus further includes a helical drive train formed from a lead screw assembly having a motor means, a drive shaft, and a drive sleeve for imparting a helical scanning motion to the probe carrier with respect to the housing. The interior of the drive sleeve is slidably engaged to the shaft which is in turn coupled to the output of the motor, while the outside of the drive sleeve is threadedly engaged to the interior of the housing. The probe carrier is in turn coupled to the drive sleeve.

4856337, Aug 15, 1989

Jul 30, 1987

7/079860

Michael J. Metala - Murrysville PA
William G. Clark - Murrysville PA
Warren R. Junker - Monroeville PA
Lee W. Burtner - Elizabeth Twp., Allegheny County PA
Thomas E. Arzenti - Greensburg PA
Harold P. Johnson - Verona PA
Robert P. Vestovich - Monroeville PA
Bruce W. Bevilacqua - Irwin PA

Westinghouse Electric Corp. - Pittsburgh PA

G01N 2900

73601

Both an apparatus and a method for simultaneously inspecting the walls of a tube with both ultrasonic and eddy current probes is disclosed herein. The apparatus generally comprises a cylindrical housing assembly insertable within the tube to be inspected, and a probe carrier rotatably mounted within and helically movable with respect to the housing. The probe carrier holds three ultrasonic probes for transmitting ultrasonic beams which are directly oriented radially, chordally, an axially with respect to the longitudinal axis of the tube, as well as an eddy current probe for simultaneously inspecting the walls of the tube with electromagnetic lines of flux. The apparatus further includes a helical drive train formed from a lead screw assembly having a motor means, a drive shaft, and a drive sleeve for imparting a helical scanning motion to the probe carrier with respect to the housing. The interior of the drive sleeve is slidably engaged to the shaft which is in turn coupled to the output of the motor, while the outside of the drive sleeve is threadedly engaged to the interior of the housing. The probe carrier is in turn coupled to the drive sleeve.