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)
of the ellipse, hence we have four of the points\marked respectively i, 2, 3, 4) in the ellipse. To ob- PROJECTIOXS. IQI tain the remaining points, lines /, u, v, w, x, y (whichstart from the point on the face F where the Hnes m,n, o, p, q. r, respectively meet it) are drawn across theface of B as… … intersection of centre line G and line /, and two arcsas 5 and 6 drawn, giving two more points in the curveof the ellipse. The compasses are then set to thelength of line h (that is, from centre line D to pointof division b), and this distance is transferred, settingthe compasses on centre line G…
Mechanical drawing
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