Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 353
r,)and the spindles and shafts of the wheel gearing by which the power is applied thereto. D is the chainpulley, which is inserted in an aperture formed in the top of the jib. The chain passing over this pulleyenters the interior of the crane, and is continued down to the chain barrel. E is a… … Fig. 1017 is a vertical section of another crane, constructed on the same principle as that which hasjust been described, but calculated for lifting much greater weights (say 20 tons); it differs in havingthe lower or concave side A A of the jib strengthened by means of three additional plates B,…
Mechanical engineering
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