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)
but is short to the amount of clearance. Havingobtained the arcs d, e,f, the curves may be markedthereon as for a spur wheel. A tooth thus marked isshown at x, and from its curves between b and c, atemplate may be made for the large diameter or outerend of the pinion teeth. Similarly for the wheel… … Fig.
Mechanical drawing
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