A general geometry and calculus : including book I. of the general geometry, treating of loci in a plane; and an elementary course in the differential and integral calculus (1881)
Olney, Edward, 1827-1887 · New York : Sheldon and Co. · leaf 182
te it coincides with the arc between two con-secutive points. Thus P and P being consecutivepoints on the involute, the radius at P is to be consid-ered as having the two consecutive points C and Ccommon with the evolute to which it is tangent; and asP passes to P, the radius of curvature so… … Fig. 16L 228. ScH.—From these relations it is easy to see how an involute maybe described mechanically from its evolute. For example, to draw a para-bola, make a pattern of the form AOCM Fig. 161, the edge OCM beingthe arc of an evolute to the required parabola, and AO =p, Fasten a cordat M and,…
Geometry, Analytic · Calculus
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