Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 124
the boiler, and is furnished with a check-valve opening outward. The operation is as follows: Whenthe globe becomes filled with a certain amount of the water of condensation, it overbalances theweight at the other end of the lever, and descends. In descending, it moves the mechanism of…
Mechanical engineering -- Dictionaries
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