. Air brakes, an up-to-date treatise on the Westinghouse air brake as designed for passenger and freight service and for electric cars . Fig. 102. Independent Application Position for Distributing ValveCourtesy of Westinghouse Air Brake Company, Wilmerding, Pennsylvania spring having expanded to its normal position. This position, shownin Fig. 103, is known as independent lap. Independent Release. When the handle of the independentbrake valve is moved to release position, a direct opening is madefrom the application cylinder to the atmosphere. As the applica-tion-cylinder pressure escapes, bra
. Air brakes, an up-to-date treatise on the Westinghouse air brake as designed for passenger and freight service and for electric cars . Fig. 102. Independent Application Position for Distributing ValveCourtesy of Westinghouse Air Brake Company, Wilmerding, Pennsylvania spring having expanded to its normal position. This position, shownin Fig. 103, is known as independent lap. Independent Release. When the handle of the independentbrake valve is moved to release position, a direct opening is madefrom the application cylinder to the atmosphere. As the applica-tion-cylinder pressure escapes, brake-cylinder pressure in chamber b AIR BRAKES 129 moves application piston 10 to the left, causing exhaust valve 16 toopen exhaust ports c and d as shown in Fig. 97, thereby allowingbrake-cylinder pressure to discharge to the atmosphere. If the independent brake valve is returned to lap before all theapplication-cylinder pressure has escaped, the application piston 10 MR. Fig. 103. Independent Lap Position for ValveCourtesy of Wcstinyhouse Air Brake Company, Wilmerding, Pennsylvania will return to independent lap position, Fig. 103, as soon as thebrake-cylinder pressure is reduced a little below that remaining inthe appUcation cylinder, thus closing exhaust ports e and d andholding the remaining pressure in the brake cylinders. In this waythe independent release may be graduated as desired. 130 AIR BRAKES Fig. 104 shows the position the distributing valve parts willassume if the locomotive brakes are released by the independentbrake valve after an automatic application has been made. Thisresults in the application portion going to release position withoutchanging the conditions in either the pressure chamber or brake
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