The sheet-metal worker's guide : a practical handbook for tinsmiths, coppersmiths, zincworkers, etc., comprising numerous geometrical diagrams and working patterns, with descriptive text (1888)
Crane, W. J. E. (W. J. Eden) · London : Lockwood and Son · leaf 88
76 THE SHEET-METAL WORKER's GUIDE. Edges to be allowed. The taper must be equal on all sides. … Fig. 73. Fig. 71. To describe a pattern for a tapering oval article. Describe tbe bottom, the length, and breadth required, as in Fig. 71 ; describe the body, as in Figs. 72 and 73 ; describe the right angle, a b c (Fig. 73) ; make b e the altitude ; draw the line
Sheet-metal work
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