. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . e third rail shoes, used to col-lect the electric current from the thirdrail, for operating the main emergency air valve is shownmounted on this same beam at the ex-treme right. A larger view of this valve is shownby Fig. 2. The train line air pressure isbrought along one of the bracket arms,holding up the beam and is connected tothe valve by a rubber air hose. An ex-amination of the mechanism shows twoV shaped castings with a block betweenthem, located below and just back of thefr
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . e third rail shoes, used to col-lect the electric current from the thirdrail, for operating the main emergency air valve is shownmounted on this same beam at the ex-treme right. A larger view of this valve is shownby Fig. 2. The train line air pressure isbrought along one of the bracket arms,holding up the beam and is connected tothe valve by a rubber air hose. An ex-amination of the mechanism shows twoV shaped castings with a block betweenthem, located below and just back of thefront part of the air valve where the airpressure is admitted. The block be-tween the V castings is very light andcan be raised vertically. At a certainheight this block will engage with a stopand any further travel will cause thevalve to open, applying the brakes. The trip placed alongside of the trackis of peculiar shape. When the signal isin the danger position this trip stands inthe position shown by Fig. 3. The Vshaped castings on the shoe beam, Fig. 2,will hit the middle tooth of the trip, ro-. FIG. 3. TRIP AT DANGER POSITION. tating same so that the outside tooth willpass between the two V shaped castings,pushing the block up and opening theair valve, estopping the train. Springsare placed on either side so that the tripis simply pressed down, without damageafter the valve has been opened, as theengine passes by. The trip is mounted on the square rod,which is rotated, putting the trip ineither the danger or the clear position, June, 1913. RAILWAY AND LOCOMOTIVE ENGINEERING by means of an air cylinder protected bythe iron cover shown between the valve admitting air to iliis cylindeiis interlocked with the signal which is
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
