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 213
l is constantly in contact with theradius B c, and its point of contact is at the same time situated in the circum-ference of the circle X ; the contact will therefore cease when the extrem-ity 771 of the tooth l)ccoincs the point of contact; and this occurs when thepoint m has arrived at tlie… … -J..-^- Fig. 2T1. DRAWING OF MACHINERY. 171 to secure uniformity of motion, and at the same instant tliat another newtooth advances into geer. The determination of the point/* limits also theuseful length of the flank; for if from B as a centre, with radius By, anarc be described, the part cj of…
