Patent ID: 6633159
Filing Date: 2003-10-14
Classification: B66B,G01L,G01N

Abstract:
A method for approximating tension-load bearing capacity of a rope comprising a body of non-ferromagnetic insulator material in which a plurality of longitudinally extended ferromagnetic cord members is distributed transversely, the method comprisingcreating a partial magnetic circuit in a portion of the cord members by positioning a pair of magnetic poles adjacent to the body of the rope, wherein the poles are spaced longitudinally relative to the rope so that the partial magnetic circuit runs from one of the magnetic poles longitudinally through the portion of the cord members to the other of the magnetic poles; measuring magnetic flux that is emanating from the cord members out through the body of the rope at a position between the poles along a longitudinal direction of the rope and is associated with the magnetic circuit; and comparing, based on the magnetic flux measured at the position between the poles, measured magnetic flux leakage to predetermined data indicative of tension-load bearing capacity.