Practical mechanical drawing and machine design self taught .. (1907)
Westinghouse, Charles. [from old catalog] · Chicago, F. J. Drake & co. · leaf 16
not counting the small portionat each end, which is undivided, and whose use isto protect the end graduations from injury. Ascale should be used for dimensioning drawingsonly, and not used as a ruler or straight-edge.The measurements should be taken directly fromthe scale by laying it on the… … Fig. 18—Useful Form of Curve. use curves. They are made in a great variety offorms as illustrated in Fig. 17, but the form simi-lar to that illustrated in Fig. 18 will be found themost useful. They are made of wood, hard rub-ber and celluloid. Many curved lines can be inkedin by means of a compass,…
Mechanical drawing · Machine design
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