Cyclopedia of locomotive engineering, with examination questions and answers; a practical manual on the construction care and management of modern locomotives . J 2 a 8 (a) W End View. Figure 244 Plan View. No. 5. Duplex Air Pump in themittedmain cap nut, atmospheric pressure is always ad- and present on the surface of the oil in the oil chamber, consequently, when the pump AUTOMATIC AIR BRAKES 585 piston moves down, the partial vacuum in the pumpcylinder causes the ball valve to leave its seat, and;the oil which has previously passed from the mainoil chamber around the point of the regulating
Cyclopedia of locomotive engineering, with examination questions and answers; a practical manual on the construction care and management of modern locomotives . J 2 a 8 (a) W End View. Figure 244 Plan View. No. 5. Duplex Air Pump in themittedmain cap nut, atmospheric pressure is always ad- and present on the surface of the oil in the oil chamber, consequently, when the pump AUTOMATIC AIR BRAKES 585 piston moves down, the partial vacuum in the pumpcylinder causes the ball valve to leave its seat, and;the oil which has previously passed from the mainoil chamber around the point of the regulating valveinto the passage controlled by the ball valve is drawninto the pump cylinder in the form of a fine spray.!\Vhen the piston makes its up stroke the compressedair holds the ball valve to its seat, thereby preventing|the oil from being blown out of the oil cup refers to the No. 1 oil cup. The No. 2 Westing-jhouse oil cup consists of a brass body having a cham-jber in which the oil is contained, and instead olhaving a ball valve, and a regulating valve, there is aIsmail check valve, to which is attached a needle rodof very small diameter,
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectlocomot, bookyear1916
