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disc sheave

sheave — I. /ʃiv/ (say sheev) verb (t) (sheaved, sheaving) to gather, collect, or bind into a sheaf or sheaves. {from sheaf} II. /ʃiv/ (say sheev) noun 1. a grooved wheel forming a pulley. 2. any of various other wheels or discs with a grooved rim.… …
Portsmouth Block Mills — The Portsmouth Block Mills form part of the Portsmouth Dockyard at Portsmouth, Hampshire, England, and were built during the Napoleonic Wars to supply the British Royal Navy with pulley blocks. They started the age of mass production using all… … Wikipedia
Eccentric (mechanism) — An eccentric in mechanical engineering is a circular disk ( eccentric sheave ) solidly fixed to a rotating axle with its centre offset from that of the axle (hence the word eccentric , out of the centre). It is most often employed in steam… … Wikipedia
Ski Idlewild — Infobox ski area name= Ski Idlewild picture= Idlewild 1966map.jpg caption= 1966 trail map brochure location= Colorado, USA nearest city= Winter Park, Colorado lat degrees= 39 lat minutes= 55 lat seconds= 38 lat direction= N long degrees= 105 long … Wikipedia
Draw-works — A draw works is the primary hoisting machinery that is a component of a rotary drilling rig. Its main function is to provide a means of raising and lowering the traveling blocks. The wire rope drilling line winds on the drawworks drum and extends … Wikipedia