| 摘要 |
<p>PCT No. PCT/IB95/00303 Sec. 371 Date Nov. 4, 1996 Sec. 102(e) Date Nov. 4, 1996 PCT Filed Apr. 27, 1995 PCT Pub. No. WO95/30838 PCT Pub. Date Nov. 16, 1995A screw extending through the knuckles of the arm hinge of a pair of spectacles and having a threaded end screwed into one knuckle. The part of the screw that extends beyond said knuckle has an annular groove recieivng a circlip which engages the outer surface of the knuckle to prevent inadvertent loosening of the screw with its head held in engagement with the knuckle. The size of the annular groove receiving the circlip is such that said groove is partially located within the knuckle. As a result, should the assembly become loose, it can be tightened again by replacing said circlip with another slightly thicker circlip.</p> |
