Traction system using a multi-tendon cable with a deflection angle

A traction system, comprising:

• a plurality of substantially parallel tendons of a cable movable for pulling a load, the tendons being spaced apart according to a pattern in a plane perpendicular to the tendons;
• and
• at least one deviator for guiding the tendons, the deviator providing an angular deflection of the plurality of tendons,
• wherein the deviator includes a support structure and a plurality of segments, each segment having a body comprising an inner surface facing a convex surface of the support structure, front and rear surfaces, and a plurality of channels,
• wherein the segments are placed one after the other along a curved path of the cable around the support structure,
• wherein each channel of the plurality of channels is delimited by inner walls of said body of the segment, and extends from the front surface to the rear surface of each segment,
• wherein the channels are disposed according to said pattern of the tendons and in the front and rear surfaces of each segment, each tendon being received in a respective one of the channels, and
• wherein at least some of the segments have their inner surfaces bearing on the convex surface of the support structure in response to tensile forces applied to the tendons,
• wherein each tendon passes through the sequence of said plurality of segments such that together with the inserted tendon, the plurality of deflection works as a chain link,
• wherein said segments having inner surfaces bearing on the convex surface of the support structure form a series of n mutually abutting segments along the tendons where n is a number greater than 1, and wherein for 1<i ≦n, the ith segment of said series has its front surface in abutment with the rear surface of the (i−1)th segment of said series, and
• wherein each segment of the deviator accommodates an increment θi of angular deflection of the tendons where i=1, 2, . . . , N is an index for the N segments of the deviator, and said series has a number n≦N of segments such that the angular deflection provided by the deviator is between
• ∑
• i
• =
• 1
• n
• ⁢
• θ
• i
• and
• ∑
• i
• =
• 1
• n
• +
• 1
• ⁢
• θ
• i
• .