Grant, George B. (George Barnard), 1849-1917 · Boston, Grant gear works, incorporated · leaf 101
directrixwith it as a generatrix always parallel to itsfirst position. It will sweep up the spiraloidtooth surfaces 8^ and S^ imperfectly shownby the figure, or by Fig. 159, and they willbe correct tooth surfaces always in tangentcontact. Fig. 159 shows a full involute tooth sur-face or spiraloid,… … Involute tooth actionFig. 158. If the plane ^has a generatrix line at anyes with the axes of the gears, and ismoved in a direction at right angles with thatline, correct tooth surfaces will be swept up.In fact, any two spiraloids on any two cylin-ders will work correctly with each other,…
Gearing
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