Greenhill, G. (George), Sir, 1847-1927 · London and New York, Macmillan and Co. · leaf 385
epressure is considerably reduced, say to a head of 2 ins ofmercury. 374 THE COMPRESSING OR 270. The Condensing Pump. If the direction of motion of the valves of an air pumpis reversed, air will be forced into the receiver by themotion of the piston, and the pump is called a com/pressingor… … Fig. 82. A simple form of condensing pump, employed for in-flating pneumatic tires of bicycles, is shown in fig. 82;and fig. 78 may be taken to represent the condensingor exhausting pump required for the Westinghouse orvacuum brake on railway carriages. Condensing pumps are required to supply fresh…
Hydrostatics
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