Mechanical drawing self-taught: comprising instructions in the selection and preparation of drawing instruments. Elementary instruction in practical mechanical drawing. Together with examples in simple geometry and elementary mechanism, including screw threads, gear wheels, mechanical motions, engines and boilers (1889)
Fig. 131. minate at the lines 5 and 6. The top and bottomlines of the edge view are merely prolongations oflines 5 and 6; hence the lines 9 and 10 are drawn therequisite distance apart for the thickness and to meetthe top and bottom lines. The lines are then inkedin, the pencil lines rubbed out,… … -End View Side View Fig. 132. Suppose, however, that the piece has a step in it, asin Figure 132, and the pencilling will be as in Figure133. From the centre, the arcs 1, 2, 3 and 4 for theouter, and arcs 5, 6, 7 and 8 for the inner square aremarked; lines 9 and 10, and their prolongations, 11 100…
Mechanical drawing
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