Method for detecting the thickness of the walls of hollow manufactured bodies made from non-ferromagnetic material
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United States of America Patent
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Oct 28, 2014
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app pub date -
Nov 8, 2011
filing date -
Nov 10, 2010
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Abstract
A hollow manufactured body has at least one wall of non-ferromagnetic material with an outer surface and an inner surface facing a cavity of the body. Two mutually magnetically attracted sliders are positioned on the inner and outer surfaces. The outer slider is moved manually across the outer surface to a predetermined point where the wall thickness is to be detected; the inner slider on the inner surface follows the movements of the outer slider due to the effect of the magnetic attraction. A transducer on the outer slider is used to measure the force required to move a magnet away from the outer surface of the wall. The value of the thickness of the wall at the predetermined point is then derived from the measured force.
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