Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 345
employed to draw the corresponding curves in the screw-nutby simply inverting it; but for the interior helix a separate one must be cut,its outlines being laid off in the same manner. Projections of a Square-threaded Screw and JVut (Fig. 707).—The depthof the thread is equal to its thickness, and… … Fig. 708. MACHINE DESIGN AND MECHANICAL CONSTRUCTIONS. 329 System composed of a Wheel and Tangent^ or Endless Screiv.—In laying outthe work, the pitch of the teeth is to be determined by the required stress, asfor spur wheels, and the number of the teeth in the wheel by the number ofturns of the…
Mechanical drawing
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