Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 140
Below the upper head of the boiler is placed a metallic shield Q Q, leaving an annular steam spaceof a few inches around it, which will, in a great degree, repress the foaming of the water when thepressure is taken off by the admittance of steam into the cylinder, and will thereby prevent the… … ous, and frequently destructive, result of the entrance of water with the steam. Under this arrange-ment of the shield, the steam is drawn equally from all parts of the circumference of the boiler.The production of a free and perfect circulation of the water in a boiler has frequently been aimed…
Mechanical engineering
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