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 131
disk, although sometimes cyHndrical in shape. Har-vesters, printing presses, sewing machines, looms andsteam-valve mechanisms employ a considerable use A PRACTICAL COURSE IN … ^ANGLE OFACT/ON Fiff. 132 of cam constructions, Fig. 132, To draw an involutecam with a given rise in a given angle of action, usethe following: Let A = rise of the follower or throw, And X = the radius of the base circle C. As in the figure, the angle of action is 120 degrees, A = % X, % being the…
Mechanical drawing
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