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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 253

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 253
—1 Scale l*s = I foot «-£-J Fig. 270. The circumference of the cam is composed of fourcnrved lines, P, F, K 1, and K 2. The position of thecentre of the crank shaft in this irregularly curvedbody is at X. The arcs K 1 and K 2 differ in radius,but are drawn from the same point, X, and hence… … Scale 1£=1 footFig. 271. *-2—>

Mechanical drawing

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