| 摘要 |
PCT No. PCT/SE90/00616 Sec. 371 Date Mar. 2, 1993 Sec. 102(e) Date Mar. 2, 1993 PCT Filed Sep. 26, 1990 PCT Pub. No. WO92/05102 PCT Pub. Date Apr. 2, 1992.The present invention relates briefly to an arrangement for hoisting devices to keep a cable (10) substantially vertically stretched between a derrick or the like and a hoisting device, e.g. a derrick bridle (1), so that the cable will not be able to be depositioned by gusts and other factors. The arrangement includes a set of brackets (12) stretched between and glidably fixed to two opposed hoisting cords (2a, 4a), each bracket (12) being equipped with a ring (13) approximately center, through which ring the cable (10) runs with an increasing inner diameter for each ring (13) from the top downwards. To the cable (10) are fastened a set of elements (14) spaced apart with increasing diameter for each element from the top downwards for each inner diameter of the rings (13) so that each element (14) one by one is restricted to pass a corresponding ring (13) and thereby each hoists one by one a bracket (12) holding the cable (10). |
