. Electric railway journal . losure and the high drainage point which eliminates Pneumatic Companys standard type with combinationball bearings and thrust collar construction, which takeboth the side and end thrust wear. The steps are of the three-arm type, ball bearing, withadjustable balance spring to insure even, smooth opera-tion both opening and closing. The arms are mountedon the shaft by which the step is operated by an adjust-able lever and connections through the slide bar to thedoor shaft. By using the same ball-bearing and thrust-collar construction as on the door shafts a self-alig
. Electric railway journal . losure and the high drainage point which eliminates Pneumatic Companys standard type with combinationball bearings and thrust collar construction, which takeboth the side and end thrust wear. The steps are of the three-arm type, ball bearing, withadjustable balance spring to insure even, smooth opera-tion both opening and closing. The arms are mountedon the shaft by which the step is operated by an adjust-able lever and connections through the slide bar to thedoor shaft. By using the same ball-bearing and thrust-collar construction as on the door shafts a self-aligningstep is obtained. Further, the steps may be struck byobstructions on the street and the hangers thrown outof line to a decided degree before the step would fail tooperate because of the thrust-collar construction. The cars are equipped with the National PneumaticCompanys motormans signal light system, which givesthe motorman a light in his cab when all doors in thetrain are closed and constitutes the starting signal. The. Door Engine Installation in Header Over Door i moisture from the engine valve and prevents freezingtrouble in winter. The air supply for the engine is taken directly from thetrain line at regular service pressure. The consumptionof air is about ^ °^ a cubic foot for each completeopening and closing cycle. The air is strained througha curled hair strainer before reaching the engine valveto eliminate particles of sand or pipe scale. The enginehas splash feed lubrication, similar to the automobiletransmission principle, and will run two years with onefilling, the grease which works out with the exhaust airbeing returned to the gear for further service. The opening and closing movements of the doors andsteps are checked or cushioned, thus preventing theabuse and deterioration due to slamming. The regula-tion of this cushioning feature is accessible only tothe shop men by means of proper tools. This is done toprevent the train crews from changing or tamperingw
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
