. Electric railway gazette . rsome or unsightly. THE NEW CHICAGO TETJCK. The accompanying illustrations show a sideview and a cross section through the car axle ofthe new Chicago truck for electric cars, just The weight of the car-body and load does notcome on the truck frame (except the portiontaken by the end elliptic springs) but is trans-mitted directly to the axle through thecombination springs, thereby preventing strainsand allowing the use of a lighter frame. It is further claimed for this truck thatoscilla-tlon is destroyed right where it begins, by thearrangement of these combi
. Electric railway gazette . rsome or unsightly. THE NEW CHICAGO TETJCK. The accompanying illustrations show a sideview and a cross section through the car axle ofthe new Chicago truck for electric cars, just The weight of the car-body and load does notcome on the truck frame (except the portiontaken by the end elliptic springs) but is trans-mitted directly to the axle through thecombination springs, thereby preventing strainsand allowing the use of a lighter frame. It is further claimed for this truck thatoscilla-tlon is destroyed right where it begins, by thearrangement of these combination springs. Whenthe wheel passes over an obstruction or unevenrail joint, and is forced upward, the lower half-elliptic springs, from which the frame is sus-pended, are compressed, and therefore lengthenedin relation to the frame, and the upper half-elliptic springs, being on the same pins, are alsolengthened, which would cause their centers(where the car-body rests) to be depressed. This Leonliardt Pneumatic Car FIG. 2. CKOSS SECTION OF THE CHICAGO TRUCK. placed on the market by the Chicago ElectricTruck Company, of 1436 Monadnock Block, Chl-•cago. The truck will be made in five styles underthe patents of Geo. H. Graham of this city. Thetruck shown in Fig. 1 is designated style A. Inits design the inventor has kept in view the variedrequirements and conditions of electric railwayservice, and has aimed to produce a truck thatwould be simple in construction, economical in■operation, and at the same time be sufficientlydurable to meet all demands. The new truck has a forged steel frame withloag Cintilever extensions. It has no castings andvery few bolts. It permits of easy access tomotors and ready removal of wheels. The mainsprings are each compased of three half-elliptl3S,two of which are placed upon the axle box at a-sufficient distance apart to permit the side frameto pass over the between them, while thethird spring is inverted over the frame and
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Keywords: ., bookcentury1800, bookdecade1890, bookidelectricrail, bookyear1895
