Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 351
Fig. 723. Fig. 724. Fig. 725. The following table of sizes are from the Boston and Lockport Block Com-pany : DIMENSIONS. Size sheave. For dia. rope. Size shell. 2ix fxf i 4 inches. 3 X fxf f 5 3^x1 xi f 6 4^x1 xi- i 7 4fxlixf 1 8 S^xlixl 1 9 6ixlix| li 10 7i X 11X f n 11 DIMENSIONS. Size sheave. 8…
Mechanical drawing
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