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 (1920)
Griffin, Charles Lewis, 1867- [from old catalog], Adams, Charles Clyde, 1882- [from old catalog] joint author · Chicago, American technical society · leaf 85
m Q to R) slants in the samedirection as the invisible part of the right-hand helix, which isshown dotted in Fig. 52. Since the helix is a line drawn on the surface of a cylinder,the other projection of the helix must be the circumference of thecircle, which is the end view of the cylinder. Fig. 54… … 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…
Machinery
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