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 822
le line of the stamp, and have their whole surface available fordischarge. Cams, which lift the stem by means of the tappet, are made, as is shown in Figs. 3968 and 3969,either with one or two arms. The single-armed cam will permit greater speed of stamp than thedouble-armed cam. It will work up as… … shaft. The proper curve of the camis a modified involute of a circle, theradius of which is equal to the hori-zontal distance between the centre ofthe cam-shaft and the centre of thestamp-stem. The modification of this 3%S. 3969.
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