A practical work-shop companion for tin, sheet-iron, and copper-plate workers ... with numerous valuable receipts and manipulations for every-day use in the work-shop (1904)
Blinn, Leroy J. [from old catalog] · Philadelphia, H. C. Baird & co. · leaf 102
distances, as in the semicircle AGB(Fig. 92); from the points draw lines parallel to BE;make BE equal to BC (Fig. 92); make AD and CF equalto AF (Fig. 92) ; also, each of the parallel lines bearingthe same figures as i i, 2 2, 3 3, etc. ; then a line tracedthrough the points will form the pattern.… … 8 8iOB To describe an Elbow Pait em at any Angle.—Let ABCD(Fig. 94) be the given elbow; draw the line AB at rightangle to BF; draw the line EF ; describe the semicircleAGB ; divide the semicircle AGB into any number ofequal parts; from the points draw lines parallel to BF, asI, 2, 3, etc. .a. 80…
Metal-work
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