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 39
ngabout centers A and B, which are in ^ OB,the common normal or line of centers of thetwo curves at their common point. ENVELOPING TEETH. If teeth of any arbitrary shape, Fig. 3, arefastened to one rotating wheel A, they can THE NORMAL THEOEY OF THE GEAR TOOTH CURVE. be made to form teeth on a… … of all their Conjugate enveloping teeth will form theoriginating teeth by the same process, re-versed, on a new wheel blank like the original,but if not conjugate they will not always re-produce the originals. FigA UnveZopiiig teeth These enveloping teeth can be formed byscribing lines about the…
Gearing
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