Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 662
nd terminates in a bevel-wheel. On the rear axle are twoother bevel-wheels, which can be moved to and fro by means of the lever 31, so that either can bethrown into gear with the bevel-wheel first mentioned, and the machine is moved to and fro by thismechanism. Motion to the cutters is given by… … 632 QUARTZ MILLS. in., and 6 ft. 7 in. The Btandards can be Bel to any angle between a vertical position and oneoii.v. The number of blows struck per minute is 160 on each side, and the rate of advance is6 ft. (he depth of out varying from one-half inch to l inch, according to the nature of the…
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