Handbook for machine designers, shop men and draftsmen (1916)
Halsey, Frederick A. (Frederick Arthur), 1856-1935 · New York, McGraw-Hill book company, inc.; [etc., etc.] · leaf 160
nequal and the larger one thus makes a less number of revolutionsthan the smaller one. The second method is entirely unlike anythingseen in connection with spur gears. Byit the pitch4ine speeds of thetwo gears are made imequal, and hence, while their diameters areequal, the lower one revolves the… … Fig. 6.—Developed helical gears.
Machine design
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