Fig. 41. … Fig. 42. 92 243- At H is a drawing of the Spiral Gear Shaft of Fig. 9. Draw center line first and mark centersof ellipses dividing into proper lengths by the eye. Draw ellipses, observing the perspective effect of distance,then draw the straight sides with convergence. 244. Threads are drawn…
Mechanical drawing · Lettering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
