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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 (1883)

Rose, Joshua · Philadelphia, H.C. Baird & Co.; London, S. Low, Marston, Searle & Rivington · leaf 273

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, 1883, leaf 273
i Fig. 288. position I on circle H as a centre line, a; from position2 on H we mark line b, and so on for the whole twenty-four positions on circle H, obtaining from a to n for the 256 MECHANICAL DRAWING SELF-TAUGHT. forward, and from n to y for the motion during thebackward stroke. Suppose now… … a right angle to it, as It is in Figure 286, and the motionunder this new condition will be as in Figure 289; theprocess for fmding tlie amount of motion along Mfrom the motion around H being precisely as before. PLOTTIXG MECHANICAL MOTIONS 257 In Figure 290 is shown a cutter-head for a wood

Mechanical drawing

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