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 530
is inter-rupted while at thesame time another valve under E, and attached to the same stem, opens and givesexit tothe air in G and D. The upward pressure in the small bellows D being removed, the con-densed air in A presses it down, while the stem connecting it with the valve C pulls this down,…
Mechanical engineering -- Dictionaries
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