Crawshaw, Fred D. (Fred Duane), b. 1874, Phillips, J. D. (James David), 1869- joint author · Chicago, New York, Scott, Foresman and company · leaf 333
A B Fig. .378. To Draw Arcs Tangent to Two Straight Lines Through a Point Instructions: Bisect BE and CE and erect perpendicularsto AB and CD at B and C. F and G are the required centers.The arcs are tangent at E. This is called a reverse or an 0. G.curve. 328 MECHANICAL DRAWING PROBLEM 13 Given:… … Fig. 379. Trammel Method of Drawing ax Ellipse Instructions: Trammel Method. Fig. 379. Mark off on acard, C D equal to 0 B and C E equal to O A. Keep the trammelwith the point D always on the major axis and point E alwayson the minor axis. Move the trammel and mark points oppositeC to form the…
Mechanical drawing
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