The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 106
gearing afterwardsreleases the valve, which is retained on its seat by the pressure of the exter-nal air, until the air witliin the cylinder of the pump becomes nearly of thesame density as the external air, when the valve (if the lower outici) fallsby its own weight, or (if the upper outlet) is… … Fig. 1, A, represents the cylinder of the pump, B, the piston, C, the piston-rod, D, D, D, pipes communicating between the main, or vessel to be ex-hausted, and the upper inlet valve-box, E, and the lower inlet valve-box, F.G, represents the upper inlet valve, and H, the lower inlet valve,…
Architecture · Civil engineering · Science
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