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)
Fig. 300. 2/2 MECHANICAL DRAWING SELF-TAUGHT. … Y\Z. ^oi, EXAMPLES FOR PRACTICE. •73 to 2 inch, 14 threads per inch, and for valves from 2^to 3 inch, 11 threads per inch* The threads at C D are made to conform tothose on the steam-pipes, the standard pitches beingas in the following table. It may be remarked,however, that the size of a globe…
Mechanical drawing
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