| 摘要 |
<p>1,062,862. Twisting ropes; uncoiling ropes. GEOFFROY-DELORE SOC. ANON. March 24, 1964 [April 12, 1963; Dec. 2, 1963], No. 12477/64. Heading D1T. In the known cable stranding apparatus illustrated in Fig. 1 and in which the frame 11 revolves around the cradle 15 carrying the take up reel 14 a first twisting action takes place immediately after the die 6 and a second twisting action takes place immediately after the pulley 10d. In the improved apparatus illustrated in Fig. 2 the frame 11 provides a smooth curved path for the cable 9 and, as a result, the two twisting actions now take place simultaneously at the die 6. - Fig 3 (not shown) illustrates a similar apparatus but in which a twisted core member (18) is also fed into the die 6. The core member is fed from a drum (16) carried by a floating cradle (17) and the core member (18) is supplied to the die 6 via a flyer arm (23) curved in manner similar to the frame 11. This arrangement is stated to exert no twist on the core 18 as it is fed to the die 6. Figs. 5, 6 and 7 show how the flyer frame 86 can be fitted with rollers 85 to support the cable as it passes therethrough, the rollers being preferably sloped and arranged singly as in Fig. 6 or in pairs as in Fig. 7 to assist the cable to rotate freely about its own axis as it passes through the flyer frame 86. Figs. 10 and 12 (not shown) show flyer arms according to the present invention incorporated in machines that are designed to unwind coiled cables without twisting the cables. Fig. 13 (not shown), shows an arrangement similar to Fig. 2 but wherein the cable is in free motion after it has been guided away from the axis of the die 6. The reason for this is that the ballooning effect of the free part of the cable can be used to control the speed of the machine. Excessive ballooning actuates means whereby the take up speed is reduced to a lower speed and after a predetermined interval the higher take up speed is again resumed, and so on. Avoiding tendency to untwist. The feed-out apparatus of the invention may be adjusted in such a manner as to impart to the strands or wires being fed out an untwisting effect of more than 100%; that is, the relative angular velocities are so adjusted that the strands or wires receive a degree of reverse twist exceeding the elastic limit of the wires, so that in the finished cable the strands will have a tendency to wind themselves inwards around the cable.</p> |
