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 95
em (p. 66). To draw the pattern for the funnel-shape pipe, the lon-gitudinal seam to correspond with the line AA (Fig. 84),proceed as follows : With V (Fig. 85) as centre, and VA(Fig. 85) as radius, describe an arc- AA, and from anypoint in it set off along the arc distances AB, BC, CD, DC,BC and… … Fig. 86. DD equal to AD (Fig. 84). Through points A, B, C,D, C, B, A draw an unbroken curved line; then AA PIPES 73 Ax\ will be one-half the pattern required. By continuingto the right, say, the arc AA, and setting off on it thesame above equal distances AB, BC, etc., and proceedingin exactly…
Metal-work
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