. The Street railway journal . of this truck are made of the best soft steelcastings and sufficiently strong to carry the heaviest car are supported flexibly from the journal boxes, and are aslow down as the motors will permit. Peckhams patent swingliolster is used in this truck. This bolster is constructed of steelchannel-bars, supported upon a combination of half-elliptic and October 5, 1901.] STREET RAILWAY JOURNAL. 505 spiral springs, the elliptic spring being located in the center andthe two spiral springs at each end of the bolster. Their strengthis so adjusted that the spira
. The Street railway journal . of this truck are made of the best soft steelcastings and sufficiently strong to carry the heaviest car are supported flexibly from the journal boxes, and are aslow down as the motors will permit. Peckhams patent swingliolster is used in this truck. This bolster is constructed of steelchannel-bars, supported upon a combination of half-elliptic and October 5, 1901.] STREET RAILWAY JOURNAL. 505 spiral springs, the elliptic spring being located in the center andthe two spiral springs at each end of the bolster. Their strengthis so adjusted that the spiral springs prevent the rocking of thebolster and reinforce the half-elliptic springs as the load of thecar body is increased. The spring plant supporting the springs steam cars, and can be more easily regulated so as to preventrolling motion of cars when running at high speed. The journal boxes are M. C. B. standard pattern, with standardM. C. B. journals, as specified. The brakes are constructed with shoes on the inside of the. 30 TRUCK, HIGH SPEED fs suspended from the transom-bars by links, which are outwardlyinclined so as smoothly to check the swing of the car. Buffersprings are inserted in the transom-bars and receive the end thrustof the bolster when it is inclined to swing too far. The center-bearing swivel plates are constructed of segmentalshape and provided with an oil chamber and wick for conveyingoil to the center plates. The top and bottom swivel-plates are pro-vided with projections so as to regulate the swing of the kingpin can be located at any desired distance from the axle. The end sections are of angle-bar shape, machine-fitted to theend extensions of the side frames and secured in place by machine-turned bolts. This construction, besides being very strong, keepsthe truck square. Inside adjustable brakes are used, as shown. The Peckham high-speed non-tilting M. C. B. motor truck is illustrated in the next engraving. This truck is designedfor
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Keywords: ., bookcentury1800, bookdecade1880, bookidstreetrailwa, bookyear1884
