Appleton's cyclopædia of drawing, designed as a textbook for the mechanic, architect, engineer, and surveyor (1866)
Worthen, William Ezra, 1819-1897, [from old catalog] ed, Appleton, firm, publishers, New York. (1866. D. Appleton & co.) [from old catalog] · New York, D. Appleton and company · leaf 212
Fig. 269. Fig. 270. Of eficycloidal teeth.—The simplest illustration of the action of epicy-cloidal teeth is when they are employed to drive a trundle, as representedin fig. 270. Let it be assumed that the staves of the trundle have no sen-sible thickness ; that the distance of their centres apart,…