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 155
g with an elevation. When this course is pursued, the method of developing the pat- tern for the upper cheek differs in no material respect, since lines may be located upon those portions which are to form the throat and heel, whose plans will be points K J 23 Mand T4560 of the plan as shown.… … Fig. 72. Object Constructed from Parts Shown in Fig. 71. Fig. 70. These breaks or bends are the objectionable feature, although difficult to eliminate, especially if the rise is considerable, from the fact that the surface re- sembles the above spoken of surface, the Right Helicoid. A Simple…
Sheet-metal work
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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