Catalogue of the Mechanical Engineering Collection in the Science Division of the Victoria And Albert Museum, South Kensington Pt. 1
Catalogue of the Mechanical Engineering Collection in the Science Division of the Victoria And Albert Museum, South Kensington Pt. 1
Victoria And Albert Museum
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Hydraulic pumping ram. Lent by H. P. Vacher, Esq., 1903. M.3310. This ram is arranged for utilising the energy of a stream of possibly impiire water for pumping clean water from some other source. The impulse portion consists of a lower casing with an attachment for a drive pipe, and a pulse valve of a form patented in 1898, by Mr. R. C. Green, in which a rubber disc with a central hole is suspended below a concave grating which serves as a seat. The drive water flows away through this valve un...til its velocity becomes sufficient to bulge the rubber on to the grating and thus close the outlet. Above this portion and in communication with the drive pipe is a vertical cylinder fitted with a spring-loaded piston, which is attached to the piston of a single-acting force pump arranged above it and combined with an air vessel. When the column of water in the drive pipe is suddenly stopped, through the closing of the pulse valve, the accumu- lated energy is largely utilised in performing the delivery stroke of the pump, which forces water into the air vessel, and also compresses the spring ; when the shock has passed ofi the pulse valve opens, by its elasticity, and the return or suction stroke of the pump is performed by the helical spring.
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