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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)

Rose, Joshua · Philaelphia, H.C. Baird & co.; [etc., etc.] · leaf 217

An illustration from 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, leaf 217
nt of the pinionteeth is marked below; thus arc b does not meet h or/, 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…

Mechanical drawing

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