. American engineer and railroad journal . Truck Fitted with Wooden Bolster. The trucks are of the diamond, arch bar type, designed withthe special olsject of bringing the bearing low enough to admitof using an efficient depth in the body bolster. Three forms of truck bolsters are shown; one is the Betten-dorf, another is of cast steel and the third is of wood, withtruss rods. The different arrangements of springs are also il-. Showlng Steel Bolsters and Spring Plank. lustrated, and it will be noted that the spring plank is in theform of a channel of cast steel, the web of which is %-inchthick
. American engineer and railroad journal . Truck Fitted with Wooden Bolster. The trucks are of the diamond, arch bar type, designed withthe special olsject of bringing the bearing low enough to admitof using an efficient depth in the body bolster. Three forms of truck bolsters are shown; one is the Betten-dorf, another is of cast steel and the third is of wood, withtruss rods. The different arrangements of springs are also il-. Showlng Steel Bolsters and Spring Plank. lustrated, and it will be noted that the spring plank is in theform of a channel of cast steel, the web of which is %-inchthick, the ends being formed to receive tlie arch bars and col-umns. This form was chosen in order to obtain room for the5% by 7-Inch springs and at the same time to get the brakebeams as nearly opposite the centers of the wheels as possible with a reasonable wheel base. The brakes are hung from thetop of the bolster in order to get the benefit of the springsiu the brake connections. The form of this spring plank no-cessitated using cast steel and Mr. Leeds is now consideringthe advisability of extending the castings with wings underthe columns in order to have the lips over the lower archbar, now formed by the columns, as integral parts of the springplank, furnishing a rigid guide for the arch bar 23Vi inchesiu length, which ought to serve the Important purpose ofkeeping the truck square. This spring plank was designed soth
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
