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camshaft
A camshaft is a shaft to which a cam is fastened or of which a cam forms an integral part.
==History==
An early cam was built into Hellenistic water-driven automata from the 3rd century BC.〔Wilson, Andrew (2002): "Machines, Power and the Ancient Economy", ''The Journal of Roman Studies'', Vol. 92, pp. 1–32 (16)〕 The camshaft was later described in Turkey (Diyarbakır) by Al-Jazari in 1206. He employed it as part of his automata, water-raising machines, and water clocks such as the castle clock.〔Georges Ifrah (2001). ''The Universal History of Computing: From the Abacus to the Quatum Computer'', p. 171, Trans. E.F. Harding, John Wiley & Sons, Inc. (See ())〕 The cam and camshaft later appeared in European mechanisms from at least the 14th century,〔A. Lehr (1981), ''De Geschiedenis van het Astronomisch Kunstuurwerk'', p. 227, Den Haag. (See ())〕 or possibly earlier.〔(retrieved June 21, 2007 ) 〕
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