D - Textiles – Paper – 07 – B
Patent
D - Textiles, Paper
07
B
13/3, 140/59
D07B 1/00 (2006.01) D07B 1/08 (2006.01)
Patent
CA 1301026
23937-54 ABSTRACT The tensile force that acts on a wire cable that is suspended over a large height differential, such as a bucket cable is equal to the useful load at the lower end of the wire cable and at the hanging length of the wire cable is equal to the useful load augmented by the weight of the cable beneath the point that is under consideration. The turning moment that is generated in the wire cable thus increases in an upward direction from the lower end of the cable, and there is no equilibrium of the turning moment along the length of the wire cable. This results in twist- ing within the cable structure, until such a time as a state of equilibrium is reached. This leads to unwinding in the upper area of the wire cable, with additional unwinding in the lower area. The unwinding in the upper area loosens the cable structure at this point. Overall, this results in damage that can reduce the useful life of the wire cable. It is proposed that the increase in the turning moment towards the upper end of the cable be counteracted by a change in the structure of the cable in an upward direction, that reduces the load specific turning moment, i.e., the turning moment generated by the load unit, in an upward direction. This can be done in a variety of ways.
547480
Drahtseilwerk Saar Gmbh
Fetherstonhaugh & Co.
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