Grant, George B. (George Barnard), 1849-1917 · Boston, Grant gear works, incorporated · leaf 70
volve on the given fixed center b, bythe following process. From any pitch point 0, step off equal arcsOc, cc, cc; draw circular arcs cd from thecenter a; draw circular arcs dn from thecenter h; step off the same equal arcs Oe,ee, ee, then Oeee will be the required mat-ing pitch line. These curves… … Fixed centers Fig. 108. variable, and always equal to the inverse pro-portion of any two mating radiants, ac and be. 68 Multilobes. 129.—CLOSED PITCH LINES. When one of tlie curves of Fig. 108 is aclosed curve, the other will in general notbe closed, but by trying different centers, acurve can be…
Gearing
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