A practical course in mechanical drawing for individual study and shop classes, trade and high schools (1912)
Willard, William Franklin, 1879- · Chicago : Popular mechanics company · leaf 130
BD. Set a fourth stake,F, at the intersection of EA and CD. Measure AC,AF and FE. Show that AB is a fourth proportionalto AF, AC and (FE—AF). Draw a line through Dparallel to AB. D bisects BE. DX is always AB.Fig. 131. 2- Problem 5.—Draw an involute cam which involvesthe construction of the… … Fig:. 130
Mechanical drawing
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