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 32
2, etc., supplies the true length of the base of a triangle, whose hypothenuse is the line in its true length, we may set ofif from B along line B C, distances found from A, Fig. 16, to points 1, 2, 3, etc., as shown in similarly num- bered points of Fig. 17. The distances found from point A, Fig.… … Fig. 18. Semi-pattern for an ObliQue Cone. The vertices of all triangles of which the surface of the cone is composed, are at the apex of said cone, there- fore the lines forming two sides of each of those triangles will radiate from point A of the plan, or pattern, as shown.
Sheet-metal work
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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