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 191
182 TRIANGULATION Therefore we simply transfer lengths as found in eleva- tion to similarly designated lines upon the plane of de- velopment to locate points through which a line may be traced to represent the boundaries of the pattern for the round collar, as is clearly shown in Fig. 87. … Fig. 91. Pattern for the Required Opening in the Conical Form. The one who has followed this work will have little difficulty in developing the pattern for the conical form, since this has been fully explained in the early chapters, therefore reference to that is here omitted. However, attention is…
Sheet-metal work
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
