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Wood pattern-making; the fundamental principles and elementary practice of the art (1906)

Purfield, Horace Traiton · Ypsilanti, Mich., The Scharf tag, label & box co. · leaf 67

An illustration from Wood pattern-making; the fundamental principles and elementary practice of the art, 1906, leaf 67 — r way sometimes adopted forforming projections on a casting is made clear by Figs.20 and 21. They represent a hollow, cylindrical cast-ing, with a flange on both ends, a projecting boss for apipe on one side about midway of its height, and anopening through the top. The pattern will have to… … Fig. 2L other a core only, to be set in place at the time of ram-ming up the mold. If the second method is used, allthat the pattern-maker needs to do is to make a core boxwith a pattern projection located in it. This core box is represented by Fig. 22. If the firstmethod is adopted, a core print…

Patternmaking

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