Triangulation applied to sheet metal pattern cutting : a comprehensive treatise for cutters, draftsmen, foremen and students ... (1920)
Kidder, F. S. (Fred SMith), b. 1863 · New York : The Sheet Metal Publication Company · leaf 202
BRANCHED FITTING 193 a half pattern from the diagrams before us, we must duphcate practically all measurements found in those diagrams. Therefore we draw in any convenient posi- tion, a line, some portion of which is the line 1 A, as shown at the vertical line 1 A, Fig. 95. Having located a point… … Fig. 92. true length of line 1 A found in the diagram of triangles, as shown at A of the pattern. This is a line which divides the flat triangular surface of the fitting into two ec|ual parts. Through point A of the pattern, we draw a line per- pendicular to the first, making it of a length each…
Sheet-metal work
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
