Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 327
line of contact work well together, but no wheel should have less than twelveteeth to work well. Involute wheels can not be made with very long teeth, because the obliquityof the line of contact will be too great. The diameters of spur wheels are in proportion to the number of their revo- 310… … Fig. 684. of their angular velocities. Let B and 0 (Fig. 685) be the position of the twogiven axes, and let them be prolonged till they meet in a point A. Further, letit be required that 0 makes seveyi revolutions while B makes four. From anypoints D and E in the lines A B, A 0, and perpendicular…
Mechanical drawing
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