Modern moulding and pattern-making : a practical treatise upon pattern-shop and foundry work, embracing the moulding of pulleys, spur gears, worm gears, balance-wheels, stationary-engine and locomotive cylinders, globe valves, tool work, mining machinery, screw-propellers, pattern-shop machinery, and the latest improvements in English and American cupolas (1885)
Mullin, Joseph P · New York : D. Van Nostrand · leaf 177
EJTGLISH AND AMERICAN CUPOLA-PRACTICE. 157 features set forth in their inventions are new; but with a knowledge of the various forms of melting used in England, the United States, and other countries, combined with their own experience gained from con- structing cupolas, they have, after many… … patent rapid cupola lies in hav- ing its internal diameter reduced at the melting part. There are also several tuyeres arranged in three zones, termed the lower, middle, and upper zones, and respec- tively indicated in Fig. 163 by the letters A B O. In the top row, (7, each tuyere is provided with…
Founding · Patternmaking
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