G - Physics – 01 – B
Patent
G - Physics
01
B
33/112, 354/25,
G01B 7/12 (2006.01) G01B 7/06 (2006.01) G01N 27/72 (2006.01) G01R 33/12 (2006.01)
Patent
CA 1217865
"ABSTRACT OF THE DISCLOSURE" A method for facilitating the determination of the thickness of a coating on an article, especially a highly elongate article such as a wire, having a ferromagnetic substrate for the coating, the coating being electrically conductive and of substantially lower magnetic permeability than the substrate, includes disposing in proximity to the article an inductively wound wire coil while applying an alternating electrical current to the coil. An electrical property of the coil is monitored for deriving a signal or other indication representative of the monitored property. The thickness of the coating may be determined from this indication. Apparatus for performing the method includes an inductively wound wire coil positionable in proximity to the article; the means for applying an AC current to the coil; and means for monitoring the electrical property and deriving the signal or other indication.
433996
Cross Rodney C.
Summers Warwick R.
Australian Wire Industries Pty. Ltd.
John Lysaght (australia) Limited
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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