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)
63, may begiven. It is the better plan, both In square and hexagonheads, to give the view in which the full face of a fiatis presented, that is, as in Figures 155 and 163; be-cause, in the case of the square, the length of a sideand the width across the head are both given in thatview; whereas if… … Fig. 163.width across corners. In the case of a hexaeon the EXAMPLES IN BOLTS, NUTS, AND POLYGONS. 125 middle of the three flats is equal in width to the di-ameter of the bolt, and .the other two are one-half itswidth; all three, therefore, being marked with the sameset of compasses as gives the…
Mechanical drawing
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