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Harold L Schenk Deceased412 Edgetree Ln, Murrysville, PA 15668

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412 Edgetree Ln, Murrysville, PA 15668    724-3272941   

Monroeville, PA   

Louisville, CO   

Boulder, CO   

Louisville, CO   

412 Edgetree Ln, Murrysville, PA 15668   

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Us Patents

Eddy Current Thickness Gauge With Constant Magnetic Bias

US Patent:
4553095, Nov 12, 1985
Filed:
Jun 10, 1982
Appl. No.:
6/387051
Inventors:
Harold L. Schenk - Monroeville PA
Warren R. Junker - Monroeville PA
Assignee:
Westinghouse Electric Corp. - Pittsburgh PA
International Classification:
G01B 710
G01R 3312
US Classification:
324230
Abstract:
An eddy current thickness probe for measuring the thickness of a weakly ferromagnetic material layer on a ferromagnetic base is provided with an essentially constant magnetic field bias. The magnetic field bias is of sufficient strength to substantially saturate ferromagnetic constituents in the weakly ferromagnetic layer. This eliminates any effects of changes in permeability of the weakly ferromagnetic layer which would otherwise impair the operation of an eddy current thickness gauge.

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