. American engineer and railroad journal . tied to the side andcenter sills by angle connections and gusset plates and arere-enforced by angles riveted over and under, as shown in thedrawing. Special attention was given the end sills with aview of making them stiff and strong. Several forms of hop-per mechanism have been designed for this car. One employschains for closing the doors and another uses toggles outsidethe doors. With the latter arrangement the doors cannot openor work loose when closed and they are easily opened orclosed by the mechanism. The top of the car is stiffened by 4 by 3-
. American engineer and railroad journal . tied to the side andcenter sills by angle connections and gusset plates and arere-enforced by angles riveted over and under, as shown in thedrawing. Special attention was given the end sills with aview of making them stiff and strong. Several forms of hop-per mechanism have been designed for this car. One employschains for closing the doors and another uses toggles outsidethe doors. With the latter arrangement the doors cannot openor work loose when closed and they are easily opened orclosed by the mechanism. The top of the car is stiffened by 4 by 3-in. angles and by4 by 2-in. verticals of T-section. The floor angles are 4 by 4 ins.,the end supports are of the same size, the platform and bodyangles and the platform bottom angles are 4 by 3 ins. At theends the body braces are 6-in. channels and 4 by 3-in. trucks are of the diamond type with Mr. Woodcocksspecial cast steel bolsters and malleable iron journal boxesfor 5V2 by 10-in. journals. The designer has had a wide expe-. 1901. AMERICAN ENGINEER AND RAILROAD JOURNAL. 12 9 rience in the manufacture and testing of metals both here andabroad and has developed a patented alloy which is specifiedfor the truck and body bolsters. Open-hearth steel will beused which contains an alloy for the improvement of the physi-cal qualities of the casting. By the use of this alloy the ulti-mate tensile strength is increased 30 per cent, and the castingsare solid and free from mechanical defects. For the materialof this car soft steel is specified with ultimate strength be-tween 54,000 and 62,000 lbs., elastic limit, 50 per cent, of theultimate strength, and an elongation of 25 per cent, in 8 ins. Ifbasic open-hearth steel is used for the plates the phosphorusmust not exceed per cent., and if acid, it must not per cent. Other features of the design as to details areshown in the drawing. HEATING PASSENGER TRAINS WITH EXHAUST STEAMFROM THE AIR-BRAKE PUMR A n
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
