Abstract:
Bei einem durch eine Seilscheibe angetriebenen Treibseil, mit einem Seilkern (19) aus in konzentrischen Litzenlagen (14, 16) miteinander parallelverseilten tragenden Aramidfaserlitzen (9, 10, 11), wird vorgeschlagen, die Litzen (12) einer äussersten Litzenlage (12) im Gegenschlag mit dem Seilkern (19) zu verseilen. Durch die Gegenschlagverseilung heben sich die unter Last in den Litzenlagen (14, 16, 21) entstehenden Drehmomente gegenseitig auf; es wird ein drehungsneutraler Seilaufbau erreicht. Ein elastischer Zwischenmantel (20) zwischen den gegenschlagverseilten Litzenlagen (16, 21) dient als Abriebschutz für die Litzen (10, 11, 12) und einer grossflächigen Drehmomentenübertragung im Aufzugsseil (1).
Abstract:
Câble aramide à haute résistance en flexion comprenant une âme (1) autour de laquelle sont toronnés des fils synthétiques revêtus par une gaine (5). Selon l'invention, les fils synthétiques (2, 3, 4) sont des fils aramides imprégnés à coeur par une résine (8) à haute résistance à l'abrasion et à faible coefficient de frottement. Applications : Câbles de manutention devant subir un grand nombre de flexions alternées.
Abstract:
A flexible tension member for structural applications comprises twenty or more high strength rods (R) bundled helically with a lay length 20 to 150 times overall diameter, the rods (R) upon introduction being substantially free from curvature resulting in slackness in the bundle and introduced without flexural stresses significantly exceeding the yield point of the rod structure. The invention may utilise rods of solid circular or non-circular cross-section, or tubular and formed of metal, e.g., steel, and/or non-metallic material, more particularly fibre reinforced plastics, and results in a smooth uniform appearance, with good integrity and no signs of slackness despite the unusually long lay length employed.
Abstract:
A compensating cable (2) for an elevator (8) or the like comprising at least one elongated strength member (9) disposed in an elongatged sheath (11) together with elongated means (14-14', 17-17'), made from a mixture of metal particles (13) embedded in a plastics material (12) occupies part of the volume of the sheath and a plurality of elongated fibres (10) occupy that volume of the sheath not occupied by the elongated strength member or the elongated means made from metal particles embedded in plastics material; the elongated particles being adapted to move relative to one another, the elongated strength member and the elongated sheath, having a coefficient of elongation or not more than 30% and a coefficient of friction relative to all surrounding materials.
Abstract:
Individual elongate elements (wires 2 or strands 4) are drawn off stationary coils (21) in such a manner that the element (2,4) is elastically twisted. The elements (2,4) are guided to a stationary closing means (23) in which a bundle of the elements is formed, the elements immediately before being formed into the bundle being substantially free from any curvature that will result in residual slackness in the elongate member (1,3) being manufactured. The bundle is withdrawn from the closing means (23) and is simultaneously rotated about its axis so as to form the elongate member (strand 1 or rope 3) and substantially untwist the elongate elements (2,4). The product can be at least 300 m long.
Abstract:
A flexible tension member for structural applications comprises twenty or more high strength rods (R) bundled helically with a lay length 20 to 150 times overall diameter, the rods (R) upon introduction being substantially free from curvature resulting in slackness in the bundle and introduced without flexural stresses significantly exceeding the yield point of the rod structure. The invention may utilise rods of solid circular or non-circular cross-section, or tubular and formed of metal, e.g., steel, and/or non-metallic material, more particularly fibre reinforced plastics, and results in a smooth uniform appearance, with good integrity and no signs of slackness despite the unusually long lay length employed.