| 摘要 |
1,121,052. Bollards. C. O. H. WALLIN, and K. A. R. KOCK. 9 Feb., 1966 [9 Feb., 1965], No. 5761/66. Heading B7S. [Also in Division E2] A bollard for securing a rope has a rope engaging surface provided with undulations with the pitch of the undulating surface being greater at one part of the surface than a pitch at another part of the surface. In Fig. 1, the bollard has two said surfaces the surfaces forming opposite sides of a groove and the undulations being arranged so that the crests 8 of those of one surface are opposite the troughs 9 of those of the other surface and the width of the groove at its bottom being less than at the top. In other constructions (not shown) a substantially straight groove which tapers from top to bottom and with each side having a said undulating surface is provided. |
