. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . low pressure will move the double ended poppetvalve upward, and close the bottom ex-haust port 29, and open the top exhaustport 29, and at the same time forcepiston 24 to the top end of its cylinderpast the top exhaust port, allowing allthe steam from both high and low pressure cylinders to escape to the at-mosphere through port 30. The partswill remain in that position until actedupon by an exhaust from the oppositedirection, which will repeat the opera-tion. The low pressure p
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . low pressure will move the double ended poppetvalve upward, and close the bottom ex-haust port 29, and open the top exhaustport 29, and at the same time forcepiston 24 to the top end of its cylinderpast the top exhaust port, allowing allthe steam from both high and low pressure cylinders to escape to the at-mosphere through port 30. The partswill remain in that position until actedupon by an exhaust from the oppositedirection, which will repeat the opera-tion. The low pressure piston cushionson the air left in the ends of its cyl-inder beyond the exhaust ports, whichescapes through the small ports leadingto the poppet valves which are filed flaton four opposite sides to allow it to OlESTIONS AND ANSWERS ON AIR BRAKE SUBJECTS. (i) G. T., Battle Creek, Mich.,asks: Why does a cut-out cock under acar have the handle turned at rightangles to the pipe when cut in, andparallel with the pipe when cut out?A.—This is an old custom and, possi-bly, not the best, established in the. Kailwajf $ Ltromotue i,tt/inM An Engineers Pride Theres many a Knighto
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