Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 316
he rule of sag. Intermediate supporting pulleys should be avoided as far as practicable, aseach one increases the wear on the rope. When they can not be dispensed withthey should not be less than one half to two thirds the diameter of the mainwheels. The sag of the rope when doing full work will be… … Power-transmission hy Chains.—Fig. 665 is a sectional perspective of a pul-ley in which there is a groove for the vertical links of the chains and a face for 300 MACHINE DESIGN AND MECHANICAL CONSTRUCTIONS. the horizontal ones, which serve merely as guides for hoisting in cranes or saw-mills and…
Mechanical drawing
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