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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 269

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 269
wheel, G, operated by a pinion,P. At A is an arm having journal bearing in B at C.This arm is driven by a pin, D, fast in the gear, G;hence as the gear revolves, pin D moves A around onC as a centre of motion. A is provided with a slotcarrying a pin, X, on which is pivoted the rod, R.The motion of… … Fig. 287. pin D, about the centre of B, and H the path of mo-tion of X about the centre C; these two centres cor-responding to the centres of B and C respectively, inFigure 287. Let the line M correspond to the lineof motion M in Figure 286. Now since it is the pinD, Figure 287, that drives, and…

Mechanical drawing

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