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 208
199 TWO PRONGED FITTING As illustrated at Fig. 97, the axes of all collars are in one plane, or as we hear it in the shop, it is "on center." A change of the plan places all collars tangent to one plane, or what is commonly known as "flat on one side." B … Fig. 98. The Plan and Elevation of a Fitting as Shown at Fig. 97. For the moment we shall presume that the pattern is re- quired for a fitting as illustrated at Fig. 97, and as the work progresses, endeavor to explain the methods which may be pursued to secure the pattern when it is required that…
Sheet-metal work
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
