. Air brakes, an up-to-date treatise on the Westinghouse air brake as designed for passenger and freight service and for electric cars . connects port h andthe outlet c tothe atmos-phere. Conse-quently, whenturned downthe triple-valve exhaust is open through tne retaining-valve pipe, port h, groove a, and exhaust port c to the atmosphere. When the retaining-valve handle is ^turned up to the horizontal posi-tion, Fig. 66, groove a connects port h below the cock key with port h above it, so that w^hen a release is made, the air exhausting from the brake cylinder flows to the retaining valve and
. Air brakes, an up-to-date treatise on the Westinghouse air brake as designed for passenger and freight service and for electric cars . connects port h andthe outlet c tothe atmos-phere. Conse-quently, whenturned downthe triple-valve exhaust is open through tne retaining-valve pipe, port h, groove a, and exhaust port c to the atmosphere. When the retaining-valve handle is ^turned up to the horizontal posi-tion, Fig. 66, groove a connects port h below the cock key with port h above it, so that w^hen a release is made, the air exhausting from the brake cylinder flows to the retaining valve and through port 6, cavity a, and upper port h to the weighted valve 4> which it must lift in order to flow past valve 4 to the atmos- Fig. 68. High-and Low-Pres- -, , —,, . , sure Retaining Valve, pnere through the small port a. i he weight showing Three . . „ ^ T Positions If. is capable of retaining a pressure of 15 pounds in the brake cylinder. As long as the pressure of the air from thebrake cyhnder is greater than this, it holds the valve 4 from its seatand the air exhausts to the atmosphere through port d, which, being. Fig. 67. High- and Low-PressureRetaining Valve Section
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Keywords: ., bo, bookcentury1900, bookdecade1910, bookidairbrakesuptodat00ludy
