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)
em-ity of the major axes, a space will come at the other. 220 MECHANICAL DRAWING SELF-TAUGHT. It is not, however, always necessary to cut teeth allround these wheels, as will be seen by an examinationof Figure 256, C and D being the fixed centres of thetwo ellipses in contact at P. Now P must be on… … Fig. 256. being a straight line, A B is also a straight line andequal to C D. If then the wheels be overhung, thatis, fixed on the ends of the shafts outside the bearings,leaving the outer faces fre(\ the moving foci may beconnected by a rigid link A B, as shown. This link will tlicn communicate…
Mechanical drawing
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