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Mechanical applicances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical mvements, powers and devices"; (1917)

Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing company · leaf 253

An illustration from Mechanical applicances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical mvements, powers and devices";, 1917, leaf 253
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…

Mechanical movements

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