Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 842
e pen-dant, it is brought back again by a spring contained in the box or barrel V; the action of this spring iscommunicated to the ring by a chain which winds off the barrel, passes between the pulleys U and W,and is attached to the ring at X. Hence, in whichever direction the ring is turned, the…
Mechanical engineering · Mechanics · Engineering
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