Mechanical drawing. Elementary and advanced (1910)
Reid, John S. (John Simpson), 1856- · New York, J. Wiley & sons; [etc, etc.] · leaf 77
never be broken. CONVENTIONAL BREAKS. FlG. 101.—Breaks are used in drawings sometimes to indi-cate that the thing is actually longer than it is drawn, some-times to show the shape of the cross-section and the kind ofmaterial. Those given in Fig. 101 show the usual practice. 62 MECHANICAL DRAWING.… … Fig. 102.through one of the spokes or arms, then only the rim and hubshould be sectioned, as shown at xx No. I and z No. 2, andthe arm or spoke simply outlined. Cross-sections of the armsmay be made as shown at AA No. 2. In working drawings ofgear-wheels only the number of teeth included in one…
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