Referring to the engravings herewith (Figs. [474] to [481]), the outside case or shell, A, is made either of brass or iron as the case may be, Fig. [476], bored out at F to receive the piston, C, Fig. [478], to which power is applied at G.
Fig. 474.
This cylinder has two heads or covers, BB, Figs. [475] and [477], which close the cylinder and has journal bearings to carry the piston combined with packing boxes to prevent leakage of the liquid passing through the pump. The valves, Figs. [479], [480] and [481], DDD, are plates of composition which slip through the piston fitting neatly into the slots, EE, Fig. [478].
Figs. 475-477.
Fig. 478.
