. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . brake. If the supply pipe to the control valveis broken off, the escape of main reser-voir air must be stopped either by closingthe stop cock in the pipe or by pluggingit and as in the previous instances thestraight air brake can be used on the en-gine and tender. If the automatic control valve in ques-tion has a quick action cylinder cap, there the adjusting nut of the single pressurecontroller or reducing valve need only beunscrewed to prevent the escape of mainreservoir pressure. If the br
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . brake. If the supply pipe to the control valveis broken off, the escape of main reser-voir air must be stopped either by closingthe stop cock in the pipe or by pluggingit and as in the previous instances thestraight air brake can be used on the en-gine and tender. If the automatic control valve in ques-tion has a quick action cylinder cap, there the adjusting nut of the single pressurecontroller or reducing valve need only beunscrewed to prevent the escape of mainreservoir pressure. If the branch pipe between the straightair brake valve and the control reservoirpipe is broken the break would be pluggedtoward the control valve and as in thecase of the broken control reservoir pipe,the automatic brake could not be releasedwith the straight air brake valve. As previously stated, we have no desireto suggest anything questionable or im-practicable in these methods of overcom-ing engine failures due to broken airpipes, but if the brake pipe is broken be-tween the brake valve branch and the. AUTOMATIC CONTROL VALVE. will be an exhaust of air from the brokenpipe leading to the control valve if anemergency application or a brake pipereduction passing the point of equaliza-tion is made. The air pressure in thiscase would be from the brake pipe pastthe emergency slide valve of the quickaction cap and under certain conditionsthis feature could be employed to pro-vide a brake for the engine and tenderalone, but so long as the straight airbrake is operative this is unnecessary. If the straight air pipe is broken off notemporary repairs are necessary, as onlythe straight air brake will be disabled. If the reducing valve pipe is broken, rear of the engine, the signal pipe cansometimes be used by uniting the hose onthe pilot and making a signal pipe andbrake pipe connection at the rear of theengine or rear of tender, or if the brakevalve branch of the brake pipe is brokena connecti
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
