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 (1883)
, half-circles k, /,;;/,11, o, are drawn to meet the circle of B in the top view,and from their points of intersection with B, lines /,q, r, s, t, arc drawn, and where these meet lines a, b, c,d and e, whicli is at 7C, v, w, x, y, are points in the curve. It will be observed, on referring again to… … Top View Fig. 230. of finding the ellipse fof any given degree of angle is 138 MECHANICAL DRAWING SELF-TAUGHT. as in Figure 231, in which B represents a cylindricalbody whose top face would, if viewed from point I, ap-pear as a straight line, while if viewed from point J itwould appear in outline a…
Mechanical drawing
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