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 377
AD, and draw the line DC parallel to AB, we have the rectangle,ABCD. Now draw the diagonal, AC, of the rectangle and wrapthe paper around the cylinder, keeping the side AE on an elementof the cylinder; the paper will just cover the cylinder, the edge … BF meeting the edge AE. The point C will coincide with D andlie on the same element of the cylinder as A and at a distance fromA equal to AD. The shape which the line AC now takes is calleda helix, and the distance AD is called the pitch of the helix. If 334 MECHANISM. 27 we choose another point,…
Mechanical engineering -- Dictionaries
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