. Electric railway journal . economizes on theamount of air usedas it eliminates allquestions of leatherleaks. At the sametime it permits ofatmospheric checkor cushioning whichhas proved to be themost reliable. The engine has asafety feature bywhich a smallamount of pressureexerted by the pas-senger will hold upthe door in case ofpremature , the doormay be pushed open5 in. when fully shutto release clothingor anything thatnew door engine for new york might be caught inmunicipal railway the door. This is the limit of emer-gency opening, there being a positive stop to prevent afal
. Electric railway journal . economizes on theamount of air usedas it eliminates allquestions of leatherleaks. At the sametime it permits ofatmospheric checkor cushioning whichhas proved to be themost reliable. The engine has asafety feature bywhich a smallamount of pressureexerted by the pas-senger will hold upthe door in case ofpremature , the doormay be pushed open5 in. when fully shutto release clothingor anything thatnew door engine for new york might be caught inmunicipal railway the door. This is the limit of emer-gency opening, there being a positive stop to prevent afalse opening. The engine is extremely light on accountof its construction, the cylinders being of brass arm, rack and pinion are made of cast steel andare all accurately machined. The engines are controlledby the standard Consolidated type push button for doorcontrol, which has been perfected for the past fouryears. Fifty equipments of these engines are being installedon fifty cars of the New York Municipal A Cast-Steel Wheel with ManganeseTread and Flange A one-life, cast-steel wheel with a manganese-steeltread and flange and a ductile steel plate around thehub, has recently been introduced in the electric rail-way field by the American Steel Foundries of Chicago,111. This product is known as the Davis steel wheel,and its first cost approximates that of a rolled steelwheel. Its wear life, however, is similar to the wearlife of a cast-steel wheel or even better because of thetough wheel tread and flange produced by manufactur-ing them of manganese steel. The method by whichthe two kinds of steel are incorporated in one castingwas devised especially for the manufacture of the Davissteel wheel. It includes revolving the mold in whichthe first metal entering is treated with ferro-manganeseduring its passage from the ladle into the mold wherethe centrifugal action throws it to the wheel tread andflange. As the pouring continues, the manganese steelrim is graduall
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