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)
he points of divisions i,2, 3, etc., on lines A D and B E, draw lines pointing toC, and where these lines intersect the corresponding-vertical lines are points through which the curve maybe drawn. Thus on the side A D of the curve, theintersection of the two lines marked i is a point in thecurve;… … Fig. 86. • equal parts, and from C as a centre draw circlesthrough the points of division. Draw the outer circleand divide its circumference into twice as many equaldivisions as the line A B was divided into. Drawradial lines from each point of division on the circle,and the points of intersection…
Mechanical drawing
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