METHOD OF DETERMINING THE CONDITION OF ROPE HAVING A FERROMAGNETIC ELEMENT PROVIDING AN INDICATION OF LOCAL STRAIN

An elevator load bearing assembly, such as a polymer cord, reinforced belt, includes at least one element of a ferromagnetic material associated with each cord that comprises one or more non-ferromagnetic materials. The ferromagnetic element is associated with the cord such that a physical character...

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Bibliographische Detailangaben
Hauptverfasser:	STUCKY, PAUL, A, BALDWIN, NEIL, R
Format:	Patent
Sprache:	eng
Schlagworte:	CABLES OTHER THAN ELECTRIC CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, ORYARNS ELEVATORS ESCALATORS OR MOVING WALKWAYS HAULING HOISTING INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES LIFTING MEASURING MECHANICAL FINISHING OF YARNS OR ROPES PERFORMING OPERATIONS PHYSICS ROPES ROPES OR CABLES IN GENERAL TESTING TEXTILES TRANSPORTING WARPING OR BEAMING YARNS YARNS OR THREADS
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Beschreibung
Zusammenfassung:	An elevator load bearing assembly, such as a polymer cord, reinforced belt, includes at least one element of a ferromagnetic material associated with each cord that comprises one or more non-ferromagnetic materials. The ferromagnetic element is associated with the cord such that a physical characteristic of the ferromagnetic element changes responsive to strain on the non-ferromagnetic fibers. In one example, the ferromagnetic element is a steel wire that breaks in areas that are strained, caused by bending fatigue, for example. Detecting a number of changes (i.e., breaks) in the ferromagnetic element along the length of the load bearing assembly provides an indication of the belt condition.