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 48
d A are in the same line, the faceand flank will join at 0, and be a singlecurve. no cusp will be apparent, but the slightestincrease of the proportion will separate thepoints. In the most convenient system, whereA0E=1^° 28 40, and sin. AOE=\, thecusps will appear whenever the segmentand pinion… … Cusps of Segmental Flank.—When the ra-dius 0 J., Fig. 25, is small, compared withthe radius OC, the pinion flank takes theform shown by Fig. 24; but as the pro- OAportion j^n increases, a value will be reached, OAwhen j^ = Y sin. AOE, at which a double cusp, Q i?, will form. At exactly that…
Gearing
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