| 单词 | lock pulley |
| 释义 | > as lemmaslock pulley lock pulley n. †(a) a pair of pulleys with a locking device which enables them to be operated in unison (obsolete); (b) a pulley with a locking mechanism which prevents the attached rope or cord from slipping. ΚΠ 1847 Engineer & Machinist's Assistant 145/1 A form analogous to this was known as the ‘lock pulley’, a few specimens of which still remain in the older factories. 1910 Professional & Amateur Photographer Apr. 112 The window is provided with a shade.., and the cord which draws it up is run through a ‘lock pulley’ in the upper casing of the window. 2002 More Sewing for Home 52 A lock pulley can be used, allowing the draw cords to hang free. < as lemmas |
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