Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 323
Fig. 679. 306 MACHINE DESIGN AND MECHANICAL CONSTRUCTIONS. rolling a generating circle on the inside and outside of the pitch-circle; thusthe point A on the generating circle gives for the flank of the teeth the hypo-cycloid A B, and for the face the epicycloid A 0. … Fig. 680. The curve for the teeth of the rack is obtained by rolling the same generat-ing circle on the upper and lower side of the rack pitch-line, giving two cy-cloids, A 0 and A B, for the face and flank of the teeth. The diagram showingthe construction of above curves is, to avoid confusion,…
Mechanical drawing
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