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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 254

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 254
Scale l*«»l foot PLOTTING MECHANICAL MOTIONS. 239 the arcs P, P, with the arc K 1. Thus arcs P, P, areeccentric to the crank shaft. To draw the cam place one point of the dividers atX, which is the centre of the crank shaft, and drawthe circle E equal to width of yoke, 18 inches.Through this centre… … the dividers at X, draw the arc K 1. With a radiusof 7j£ inches, and one point of the dividers at X,draw the arc K 2. With a radius of 18 inches, andone point of the dividers at the intersection of the arcE, with the vertical line A 1 at S, draw the arc P oppositeto S, and let it merge or lose…

Mechanical drawing

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