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Machinery pattern making (1894)

Dingey, Peter Spear. [from old catalog] · New York, J. Wiley & sons · leaf 143

An illustration from Machinery pattern making, 1894, leaf 143 — I consider a good way to prevent the iron frombeing too open in the corners, as, indeed, all castings are,wherever there is a point at which counter-shrinkagetakes place. It was done by placing chills in the corner,at the back of the flange, the chills being rammed upwith the pattern. This, of… … Anurican MachinUt PA TTERX MAKING. 83 PLUG VALVES. There have been so many improvements made in valvesin recent years, that the ordinary plug valve is becomingalmost a thing of the past. One of the reasons whymany engineers have discarded the old forms is the liabil-ity of the plug or tumbler to…

Patternmaking

Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.

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