separts we must devote our attention. If we form our pinionleaves so that the portion of the leaf inside the pitch circle 206 THE MODERN CLOCK, is a straight line pointing to the center, and give that por-tion of the wheel tooth lying outside the pitch circle (calledthe addenda, or ogive of the… … Generating an epicycloid curve for a cut pinion. D, generating circle.Uotterl line epicycloid curve. Note how the shape varies with thethickness of the tooth. touches, no sliding action whatever will take place after theline of centers is passed, and if our pinion has ten or moreleaves, the addenda…
Clocks and watches
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