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 100
88 THE SHEET-METAL WORKER's GUIDE. To cover a dome by the second method. Let AFC (Fig. 89) be the section of a dome, when the length of a course of covering is obtained as follows : — The length of the course f f is equal to the course a f, and e g the breadth of it ; join E D, and the lines 1, 2,… … Fig. 89. Fig. 90. of the course at the corresponding lines on e f) through which points a line can be drawn which will give the form of the course required. To describe a pattern for a tapering square article. Erect the perpendicular line g e (Fig. 90) ; draw the line a b at right angles to g e ;…
Sheet-metal work
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