Machine drawing; a practical guide to the standard methods of graphical representation of machines, including complete detail drawings of a duplex pump and of a direct-current generator (1914)
Griffin, Charles Lewis, 1867-, Adams, Charles Clyde, 1882- joint author · Chicago, American technical society · leaf 87
Fig. 56. Accurate Diagram for Helical Spring of Round Wire have the same pitch, equal to AB for, since the square BDP N isthe same as ACML, the distance CD is the same as AB; and sincethe points L, M, N, and P are vertically under A, C, B, and D, 74 MACHINE DRAWING respectively, the distance LN is… … £• F G Fig. 57. Accurate Construction for Helical Spring of Square Wire 52; and the helix CGD, having the same diameter as AFB, is drawnby dividing circle IE and pitch CD. The helix LHN has a diameterequal to that of the circle KR, which is IE minus twice the thicknessof the wire, and is drawn by…
Machinery
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