A Treatise On The Principles And Practice Of Dock Engineering

11 2 DOCK ENGINEERING. Other apphances for dealing witli small quantities of water are the simple hand-pump and the ejector. The former is of the ordinary bücket type of pump, worked by hand. The ejector is actuated by hydraulic or by steam pressure. The principle is that of forcing a small jet or current Fig. 70a. —Pulsometer. A, Pump chamber. B, Air chamber. G, Suction pipe. D, Discharge orifice. E, Inlet valve. F, Outlet valve. G, Stop for valve. H, Cover. I, Steam inlet valve. J, Neck. K, Steampipe. through a nozzle in the interior of a discharge pipe of slightly greater diameter. Drainage water is drawn up from the sump, by suction, to fill the vacuum thus created. For removing “slurry” or liquid mud, water charged with sand, gravel, cernent scum, lioating material, and, in fact, the general drift and debris