Ames, William L. (William Lewis), 1855-, Wischmeyer, Carl · New York, McGraw-Hill book company, inc.; [etc., etc.] · leaf 113
is made equal to the desired number of lobes.Circumscribe a circle about the triangle. Locate the fociof the ellipse, as / and /. Produce ao to d, and draw acircular arc with d as center and db as radius. With centerat b and radius // strike an arc. toe. Join be Snd produce to g. Thedistances gb… … Fig. 189. with Descriptive Geometry and will not be considered. Belt Drive.—In the transmission of power by belts, it isnecessary that the center line of the belt approaching apulley must lie in the center plane of the pulley. In Fig. 188the center plane of the pulley is represented by the line…
Geometry, Descriptive
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