I.C.S. reference library : a series of textbooks prepared for the students of the International Correspondence Schools and containing in permanent form the instruction papers examination questions, and keys used in their various courses (1904)
International Correspondence Schools · Scranton : International Textbook Co. · leaf 259
curve. ■ The involvite is the path described by any point of astring that is being wound on or off a cylinder, the cylinderbeing stationary. In the involute system, the sides of theteeth of the rack are straight lines, as shown in Fig. 20. Involute teeth have two great advantages over epicycloi-dal… … Fig. 2G. one another, without affecting the perfect action of the teethto an appreciable extent. 53. GEAR CAIjCULATIONS. The Circular-Pitcli System.—For calculating the pitch diameter, number of teeth, etc. of gear-wheels, wehave, for the circular-pitch system, the following rules, where P=…
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