Grant, George B. (George Barnard), 1849-1917 · Boston, Grant gear works, incorporated · leaf 47
e curve onlyat the pitch point 0, and its variation else-where is small, but noticeable. On the faceof the tooth of a twelve-toothed pinion ofthree inch circular pitch, its error at the ad-dendum point is four-hundredths of an inch,and it will average three times that of thethree point method (82).… … The Willis odontograph Fig. 63. then drawn through the center, and unlessgreat care is used the chances of error aregreat. The angle 90° ^ ^^^ -cab distance a b W, in which s W = , and the s 8 C t 2^ t ± 8 is the number of teeth in the gear of thesame set which has radial flanks, usually12 ; c is…
Gearing
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