1
Paul J Latimer, Daniel T MacLauchlan: EMAT probe and technique for weld inspection. Daniel S Kalka, Robert J Edwards, June 2, 1998: US05760307 (208 worldwide citation)

A method and apparatus of inspecting for flaws in a specular reflector, where the flaws having an expected length and the reflector is electrically conductive. The method includes directing a beam of an electromagnetic acoustic transmitting transducer along a beam axis toward the specular reflector ...


2
Barry I Cantor, John H Flora, Paul J Latimer: Apparatus and method of discriminating flaw depths in the inspection of tubular products. The Babcock & Wilcox Company, Vytas R Matas, Robert J Edwards, Daniel S Kalka, February 4, 1992: US05085082 (45 worldwide citation)

An apparatus and method for discriminating between flaw depths of 5% and 10% of the tube wall thickness of electric resistance welds are disclosed. At least two electromagnetic acoustic transducers (EMATs) are employed to generate ultrasonic surface and shear waves. A logic circuit discriminating me ...


3
Paul J Latimer: Method for ultrasonic detection of hydrogen damage in boiler tubes. The Babcock & Wilcox Company, Vytas R Matas, Robert J Edwards, August 11, 1987: US04685334 (37 worldwide citation)

Angle-beam ultrasonic shear-waves, which are introduced via a pitch-catch technique in the axial and circumferential directions of a boiler tube, are used to detect the presence of hydrogen damage in boiler tubes.


4
Paul J Latimer, Daniel T Maclauchlan: Detection of corrosion fatigue cracks in membrane boiler tubes. The Babcock & Wilcox Company, Daniel S Kalka, Robert J Edwards, June 18, 1996: US05526691 (27 worldwide citation)

A method for detecting corrosion fatigue cracks in membraned boiler tubes in a membrane tube panel employs at least one EMAT coil generating ultrasonic SH shear waves at a predetermined beam angle. The method of the present invention provides better signal-to-noise ratios than conventional ultrasoni ...


5
Paul J Latimer: Hydrogen damage confirmation with EMATs. The Babcock & Wilcox Company, Daniel S Kalka, Robert J Edwards, November 1, 1994: US05359898 (16 worldwide citation)

A method and apparatus for use in confirming hydrogen damage in a boiler tube comprises a pair of electromagnetic acoustic transducer coils which are mounted for movement toward and away from each other. An electromagnet produces pulses that generate acoustic beams across a chord and within the wall ...


6
Daniel T Mac Lauchlan, Paul J Latimer: Detection of corrosion fatigue in boiler tubes using a spike EMAT pulser. McDermott Technology, R J Edwards, Eric Marich, October 3, 2000: US06125703 (16 worldwide citation)

A method of detecting damage in a ferromagnetic workpiece such as a boiler tube positions a pair of EMAT coils adjacent to the workpiece at a non-zero angle with respect to one another. A spike pulse is applied to one of the EMAT coils for generating a horizontally polarized shear wave in the workpi ...


7
Paul J Latimer: Confirmation of hydrogen damage in boiler tubes by refracted shear waves. The Babcock & Wilcox Company, Vytas R Matas, Robert J Edwards, Daniel S Kalka, September 14, 1993: US05243862 (14 worldwide citation)

A method and apparatus for distinguishing between hydrogen damage in the wall of a boiler tube, and surface damage on the inside surface of the tube, comprises a pair of transducers which are spaced on the outer surface of the tube and which apply a refracted shear ultrasonic wave through a chord of ...


8
Paul J Latimer, Gary W Owens, Nelson Perez, Christos N Sarantos: Rotating electromagnetic acoustic transducer for metal inspection. The Babcock & Wilcox Company, Robert J Edwards, Michael L Hoelter, August 24, 1993: US05237874 (11 worldwide citation)

This invention pertains to a method and apparatus of non-destructive testing wherein a generally bidirectional wave generating electromagnetic acoustic transducer is pivotally mounted upon a base with this transducer being continuously rotated or oscillated upon the base as it is moved with respect ...


9
Daniel T MacLauchlan, Paul J Latimer, Wayne M Latham: EMAT with integral electrostatic shield. The Babcock & Wilcox Company, Robert J Edwards, Eric Marich, March 4, 1997: US05608691 (11 worldwide citation)

A shield for an electromagnetic acoustic transducer (EMAT) has multiple layers of electrically insulating and electrically conductive materials which contain a coil of the EMAT. A first insulating layer lies directly on top of the coil and is attached thereto by a suitable layer of non-conductive ad ...


10
Paul J Latimer, Hubert L Whaley: Method of detecting creep swelling. The Babcock & Wilcox Company, Vytas R Matas, Robert J Edwards, Daniel S Kalka, July 30, 1991: US05035143 (10 worldwide citation)

A method is disclosed for ultrasonically detecting creep swelling in tubular members such as fossil utility steam lines and headers. Ultrasonic surface waves (34) are propagated around the pipe (10) in a circumferential direction. The transit time (.DELTA.T) is measured by using the pulse overlap te ...