. Air brakes, an up-to-date treatise on the Westinghouse air brake as designed for passenger and freight service and for electric cars . PTION OF EQUIPMENT Figs. 139 and 140, illustrate diagrammatically the SMEbrake equipment, including piping and relative location and namesof all parts. Type D=EQ Motor=Driven Air Compressor. Type D-EGair compressor is manufactured for use with 110-, 220-, and 600-voltdirect-current operation,also two- and three-phasealternating current at110, 220, 440, and 550volts, and for 25, 40, or60 cycles. It can also befurnished to operate onsingle-phase 100-volt cur-re
. Air brakes, an up-to-date treatise on the Westinghouse air brake as designed for passenger and freight service and for electric cars . PTION OF EQUIPMENT Figs. 139 and 140, illustrate diagrammatically the SMEbrake equipment, including piping and relative location and namesof all parts. Type D=EQ Motor=Driven Air Compressor. Type D-EGair compressor is manufactured for use with 110-, 220-, and 600-voltdirect-current operation,also two- and three-phasealternating current at110, 220, 440, and 550volts, and for 25, 40, or60 cycles. It can also befurnished to operate onsingle-phase 100-volt cur-rent, and 15 or 25 cycles. Fig. 141 illustratesthe general appearance ofthe air compressor andFig. 142, shows themethod of cradle suspen-sion under the car when in service. Figs. 143 and 144 illustrate itsform of construction. Fig. 143 being a horizontal section and sideelevation, and Fig. 144 an end elevation with a vertical section of thecylinder. Type of Compressor. The compressor is of the duplex type,having pistons moving in opposite directions. Its action in com-pressing air is as follows: Air is drawn through suction screen 4. Fig. 141. Type D-EG Motor-Driven Air Compressor Courtesy ofWestinghouse Air Brake Company,Wilrnerding, Petinsylvania 182 AIR BRAKES (which is now usually replaced by a cylinder cover with a pipedsuction to any convenient place for securing pure air) in the cylindercover 25 to chamber J through chamber H (which is filled withcurled hair), thence by raising either one of the two steel inlet valvesly through ports C or C^ into cylinders A ov B (depending uponwhich piston is moving away from the cylinder cover). On thereturn stroke the air is forced through either port K or X^ pastone of the discharge valves 2, then into chamber E, from which itgoes into discharge pipe D. Both the inlet and discharge valvesare made of pressed steel tubing and are, therefore, light and easilyremovable. The inlet valves are accessible by removing caps 5, thedischarge valve
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