A handbook on the teeth of gears, their curves, properties, and practical construction (1890)
Grant, George B. (George Barnard), 1849-1917 · Lexington, Mass., Lexington Gear Works · leaf 20
.86.04 .90.03 .94.03 .98.02 1.02.01 1.060 1.110 1.17-.01 1.23-.02 42 37-48 .79.07 1.83 .86.06 .05 .90.05 .96.04 .98.04 1.03.03 1.08 1.14.03 1 .02 1.200 1.250 1.37-.01 58 49-72 .83.08 .87.07 .91.07 .96.06 1.02.06 1.05.05 1.10.04 1,17 1.24.04 .03 1.30.02 1.430 1.580 97 73-144 .90.09 .93 .08 .97.08… … With the exception of tlie epicycloid^ the only curve in extensive use forthe working face of a gear tooth, is the involute. THE INVOLUTE CURVE. As the rolling circle A of fig. 3 increases in size, it finally, when of infinite^ ^- diameter, becomes the straight line d g of fig. 15, while the…
Gearing
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