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 47
polar spirals that canbe discussed only by the use of the highermathematics. The properties of the odontoid can gen-erally be more easily developed and clearlyexplained if it is considered as a special caseof the enveloping curve, than if it is treatedas a rolled curve, while, for practical… … The Segmental System.—If a circular arcbe drawn from a center A, Fig. 24, on a lineat an angle, EGA, with a rack pitch line,O F, its normals P Kio the pitch line, willsatisfy the law of the odontoid, and the seg-ment 0 D F will be a rack tooth that willform an interchangeable or conjugate set…
Gearing
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