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Cyclopedia of mechanical engineering; a general reference work. Editor-in-chief Howard Monroe Raymond. Assisted by a corps of mechanical engineers, technical experts, and designers of the highest professional standing (1908)

American School (Chicago, Ill.), Raymond, Howard Monroe · Chicago American Technical Society · leaf 378

An illustration from Cyclopedia of mechanical engineering; a general reference work. Editor-in-chief Howard Monroe Raymond. Assisted by a corps of mechanical engineers, technical experts, and designers of the highest professional standing, 1908, leaf 378
I234.56?<9I0III2I Q Fig. 27. parallel to AC be drawn from each of the points of division, wewould have on the cylinder three parallel and equidistant helicesof the same pitch, or a triple helix. Ficr. 20 shows a single ritrlit-hand helix, Fig. 27 a single left-hand helix. Fig. 28 a double… … Pig. 28. thread is formed, the thread being the material which is left be-tween the successive turns of the helical groove. A cylinderhaving a thread on it is called a screw, and a ])iece having a cyl-indrical hole in it, with a thread around the hole, is called a nut.The groove which is cut to…

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