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 38
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 and 01, each… … With 3 as a center, and the same radius, draw the arc JDH.With 2 and 4 as centers, and a radius equal to 2B, draw the arcsGBH and EAJ. The Involute. — Tie a piece of string about a lead pencil point.Place the triangular scale with its end resting upon a piece ofpaper. Wind the string about the…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
