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Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries (1910)

Hiscox, Gardner Dexter, 1822?-1908 · New York, The N. W. Henley publishing company · leaf 249

An illustration from Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries, 1910, leaf 249
248 MOTION AND CONTROLLING DEVICES, ETC. … 644. CHANGE SPEED PULLEYS. Lazy-tongs type. The de-vice comprises two pulleys, A and B, the rims of which are made in sec-tions so that their diameters-ML— can be varied. By turning the crank C the diameter ofA is altered, while that of Bchanges under pressure ofthe helical springs surround-ing its…

Mechanical movements

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