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 16
ELEMENTARY PRINCIPLES supply a pattern for an object whose dimensions have been established in said form, the surface of which may be looked upon as being composed of triangles. The lengths of sides of the square and octagon furnish the length of one side of each triangle. The lengths of the… … Fig. 5. Illustrating the rel- Fig. 6. Illustrating trian- ative positions the two gles from which the true pieces of sheet metal or lengths of lines may be se- cardhoard should occupy. cured. It may be here remarked that in this example, it is only necessary to determine the lengths of two lines…
Sheet-metal work
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