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)
circle may be divided as follows : The com-passes set to its radius, or half its diameter, willdivide the circle into 6 equal divisions, and each ofthese divisions will contain 60 degrees of angle, be-cause 360 (the number of degrees in the wholecircle) -7-6 (the number of divisions) =60, the… … it is required to find their angle one to the other.File circle is divided into six divisions, marked re-spectively from 1 to 6, the division being made from LINES AXD CURVES. 57 the intersection of line C with the circle. As both linesfall within less than a division, we subdivide thatdivision as…
Mechanical drawing
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