Practical draughtsmen's work, with numerous engravings and diagrams (1903)
Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 97
e a ^ on x Y, then from point a, 94 phagtigal dbaughtsmenSwork. with radius a 6; describe the arc cbd, making cab 30^, andbad 25^. Then a c represents the line at an angle of 0 degreesfrom the vertical plane, and ad the line at 0 degrees from thehorizontal plane. In each case the line has to swing… … Fig. 154.—Projection of Line. perpendiculars from c and c?, cutting XY in ^ and A, then agwill represent the line in plan when raised up to the requiredangle from the horizontal plane, but coinciding with the verticalplane. Now by radius ag swing it round to cut/cZ in point i\then a i will be the…
Mechanical drawing
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