The essentials of gearing; a text book for students and for self-instruction, containing numerous problems and practical formulas (1911)
Anthony, Gardner C. (Gardner Chace), 1856- · Boston : D.C. Heath · leaf 25
e common tangentof the contact surfaces. Whenever this con-dition occurs, positive driving will cease andthe law may be expressed as follows: Positive rotation can take place only whenthe common normal^ or line of action^ does notjMSSthroiKjh the fixed center of driver, or follower. XV. Pure… … Fig. XIV. XXU INTRODUCTION the contact is on the line of centers. If such contact is maintained, the result will be purerolling such as exists between two cylinders, or circles. Figures XV, XVI, XVII are examples of pure rolling. Fig. XV illustrates a pair oflogarithmic spirals rotating about…
Gearing
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