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 257
e whole pattern, which in this instance may be formed in either direction, since the fitting is "on center." Had this pattern been designed for a fitting with two prongs which were equal, then that portion of the semi-pattern. Fig. 121, shown at ^ i 5 5 would be the pattern for one- quarter of the… … Fig. 122. Semi-Pattern for the Branch, the Plan and Elevation of Which is Shown at Fig. 120. velop the pattern as shown at Fig. 122, is to place upon the plane of development these lines in their correct rela- tive positions. This is an operation which has been too often explained in these pages to…
Sheet-metal work
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
