Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 352
ing Company have made a pitch chain, of com-mon form but of uniform links, especially adapted to hoists, and Figs. 727,728, and 729 illustrate the construction of their chain-wheel. A is a pocketedchain-wheel, made of soft cast-iron, mounted on a frame B. C is the chain-guide enveloping the lower…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
