. Automotive industries . ion when the bus is loaded. Thereare three forward speeds with se-lector change. The indirect ratios,with the exception of the reverse,are obtained by silent type chains,there being three of these, one from the primary shaftto the layshaft and the others for the second and thirdratios. For the indirect drives sliding sleeves on thedriven shaft engage with internal teeth formed withinthe hubs of the driven sprockets and within a rearwardextension of the primary chain sprocket for the directdrive. Ball bearings are used throughout, includingdouble rows for the pilot bea
. Automotive industries . ion when the bus is loaded. Thereare three forward speeds with se-lector change. The indirect ratios,with the exception of the reverse,are obtained by silent type chains,there being three of these, one from the primary shaftto the layshaft and the others for the second and thirdratios. For the indirect drives sliding sleeves on thedriven shaft engage with internal teeth formed withinthe hubs of the driven sprockets and within a rearwardextension of the primary chain sprocket for the directdrive. Ball bearings are used throughout, includingdouble rows for the pilot bearing and for the drivensprockets, the latter, of course, rotating idly when theyare not taking the drive. The chains in each case are2% in. wide. The shafts have 5%-in. centers and lie inthe same horizontal plane; the casing, of cast aluminum,has an oil level inspection and filling hole in the centerof the overall lid. From the rear end of the driven shaft the drive istaken by a ball-bearing star or cross-pin type of uni-. L-J::;;:» Longitudinal section through silent chain transmission April 7, 1921 AUTOMOTIVE INDUSTRIESTHE AUTOMOBILE 745 versal joint to the tubular propeller shaft, which has asimilar type of joint at the rear connecting it to theworm shaft below the rear axle. Sliding movement ispermitted at both ends of the shaft on the splines ofthe solid extensions. A straight worm is used, the gearing giving a ratio to 1 as compared with to 1 in the case of theK type chassis. Although the rear axle construction followsgenerally the lines of the preceding model, it hasbeen very considerably strengthened throughout,and, while the previous model hadconical roller bearings for the differ-ential casing and wheels, the Stype has straight rollers with ballthrusts at each side of the differen-tial and plain thrust washers for thehubs. The worm shaft also ismounted on straight roller bearingswith ball thrusts. The axle center isa unit steel casting with webs on thehori
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectaeronautics, bookyear
