Essentials of drafting; a text and problem book for apprentice, trade and evening technical schools (1918)
Svensen, Carl L. (Carl Lars), 1884- · New York, D. Van Nostrand company · leaf 37
aw an Ellipse bythe Trammel Method (Fig.50).—Given the major andminor axes AB and CD.On a small strip of papermark off one half the minoraxis and one half the major axis, as shown in the figure. Placethe point 3 on the minor axis and the point 2 on the majoraxis. ]\Iake a mark on the paper opposite… … CONSTRUCTIONS 21 is to place the trammel in a number of positions, and makemarks on the paper opposite the successive positions of point 1.To draw a Curve having the Appearance of an Ellipse, by meansof Circular Arcs (Fig. 51). — Given the major and minor axes ABand CD. On the minor axis lay off 03…
Mechanical drawing
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