Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 303
Fig. 035. F L … Fig. 636. Fig. 637. At the other end of the shaft cone pulleys are shown which correspond tosimilar cones on the machine but reversed so that the speed of the machinecan be changed by shifting the belt from one set of cones to the other whenthe machine is stopped. Cone pulleys may be made…
Mechanical drawing
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