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 137
TRIANGULATION 128 be bent at an angle of 90 degrees upon the lines which represent the base and top in elevation. He will then have a form which is illustrated to some extent in Fig. 66, although it is there represented as a solid. By placing this in the angle formed by the two planes which are at… … Fig. 65. Plan, Elevation, Diagram of Triangles and Semi- pattern for One Piece of a Ship's Ventilator. beneath it, and that the elevation of a point is always back of it, the reader will have before him an illustration which should enable him to fully comprehend the plan and elevation shown in Fig.…
Sheet-metal work
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
