Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 230
ith the lever D revolving on a fixedcentre, d\ under this action the ])oint of the lever D, at which the pressure is exerted,passes through the small arc 0-10, corresponding to the arcs of the extremity of the MECHANICS. 213 lever B, but always with decreasing lengths, as shown on the figure, and… … Fig. 414. divide into equal arcs 0-10; on A as a centre describe another arc, A &, and from anypoint, say 5, with a radius equal to 6 0, describe an arc 5, intersecting the arc &; fromd asa. centre, with a radius equal to d c, describe an arc, and from 5, with a radius equalto 6 c,…
Mechanical drawing
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