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 86
Fig. 54. Diagram of Right-Hand Double Helix Helical Springs. Accurate Representation of Springs. If,instead of winding a line around a cylinder in the form of a helix, asshown in the preceding figures, we wind a piece of spring wire, weshall get a helical spring. MACHINE DRAWING 73 Fig. 56 is the… … Fig. 55. Diagram of Right-Hand Triple Helix diameter of the wire, and either one of the dimensions A, B, or CIf A is given, we subtract from A the diameter of the wire to findB; and if C is given, we add to C the diameter of the wire to get B;then, knowing B and the pitch, we can draw the helix…
Machinery
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