Mechanical drawing; a treatise on the drawing of mechanical and machine details (1920)
Jones, Franklin Day, 1879-1967 · New York, The Industrial press; [etc., etc.] · leaf 280
irst which represents a development of thesheet, and then the steel plate may be cut to the shape ofthis pattern or templet so that, when it is rolled to cylindricalform, it will accurately fit the other cylindrical body. Suchpatterns are used in boiler shops and in other places whereparts are made… … Fig. 10. Development of the Pattern for an Elbow lap joints for riveting parts together, and it may be necessaryalso to allow for changes in length, due to bending of the sheetswhen the latter are comparatively thick or heavy. These al-lowances will not be considered in explaining the methods…
Mechanical drawing
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