Rogers' drawing and design; an educational treatise relating to linear drawing; machine design; working drawings; transmission methods; steam, electrical and metal working machines and parts; lathes; boiler and parts; instruments and their use; tables, etc (1913)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 92
n. To drazv an oval by circular arcs. Let CD be the major axis and AB the minoraxis of the oval, Fig. 201. Find the difference of the semi-axes and set it offfrom O to e and f on CD and AB. Bisect ef andset off one-half of it from e to g and draw ghparallel to ef. From the center O on CD lay off… … as a radius and R and h as centers draw the arcsjAn and mBp meeting the small arcs in the pointsj and n and m and p. The figure AnDpBmCjis the required oval. 106 ROGERS DRAWING AND DESIGN. MECHANICAL METHOD. Draw a line AB equal to the major axis of the y^ ^ ^^\ / ^ ^ \ required ellipse, Fig. 202.…
Mechanical drawing · Machine design
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