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)
as D E. F. G. H. and from A mark on thepitch circle, with the same radius, an equal number ofpoints of division, as i : 4,5. With the corn- et to the radius of the generating circle, thatfrom B, as a centre, mark the arc I. from D,the ai m E, the arc K. from F, and so on, mark- arcs as there are… … k J points of division, as a, b> c. d; and d will be anotherpoint on the epicycloidal curve. From point 3off three divisions, and so on, and through the pointsso obtained draw by hand, or with a scroll, the c Hypocycloids for the rlanks of the teeth maybe tr;in a similar manner. Thus in Figure…
Mechanical drawing
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