. Science of railways . 28S LOCOMOTIVE APPLIANCES. When the filling plug is unscrewed sufficiently toallow the steam to escape, the valve in the bottomcloses and the oil cup can be readily filled withoutclosing the main steam valve. When the fiUing plugis again screwed into position the valve in the bottomis opened and the oil feeds out. THE EJECTOR OR JET PUMP. The ejector or jet pump is designed for use atrailroad water stations, on construction trains, foremptying wheel pits and similar railroad Fig. 1. , Penberthy Ejector. It is a device, simple in construction, compact inform, c
. Science of railways . 28S LOCOMOTIVE APPLIANCES. When the filling plug is unscrewed sufficiently toallow the steam to escape, the valve in the bottomcloses and the oil cup can be readily filled withoutclosing the main steam valve. When the fiUing plugis again screwed into position the valve in the bottomis opened and the oil feeds out. THE EJECTOR OR JET PUMP. The ejector or jet pump is designed for use atrailroad water stations, on construction trains, foremptying wheel pits and similar railroad Fig. 1. , Penberthy Ejector. It is a device, simple in construction, compact inform, convenient to handle, has no movable parts andcannot get out of order. Fig. 2 shows the position in which an ejector shouldbe placed for high elevations. For lifting only theejector can be placed at the boiler level. Where it is required to lift water ten feet or overit is ■ advisable to place a foot-valve on the lower-end of the suction pipp. All ejectors, if properly constructed, will lift waterto a height of twenty-five feet, but for elevating LOCOMOTIVE APPLIANCES. 28^ over twenty-five feet the ejector should be placednear the water level and a delivery pipe one sizelarger than the connections used. In this man-
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