Practical mechanical drawing and machine design self taught .. (1907)
Westinghouse, Charles. [from old catalog] · Chicago, F. J. Drake & co. · leaf 70
in Fig. 151, the oper-ation is reversed. Spherical, and other classes ofsurfaces may be represented by this method as inFig. 152, but the rendering of them requires con- siderable skill, and it is beyond the scope of thiswork to consider the various methods. Sections. It is frequently necessary to… … 67 Fig. 152. angle of 45°. The width of the lines is the sameas a fine line, and the distance between the linesis determined by the area and intricacy of thesection. These lines are not to be drawn in pen-cil, but only in ink. An instrument known as asection liner is designed to insure accuracy in…
Mechanical drawing · Machine design
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