. American engineer and railroad journal . FIfi. 1.— OF THE WAXifill DRAFT GEAR, SHOWING ALL AT BEST. surface of block C in contact with the auxiliary group is anoval of %-in. curvature, these being the curvatures taken by theauxiliary and main groups of plates when the coupler hastraveled 2% ins. in either direction. In Fig. 1, in which all parts are shown at rest, the ends ofthe abutment blocks, D, are not in contact with the auxiliarygroups, A and A\ and the opening admits of the coil springbeing compressed %-in. before pressure is exerted on theauxiliary groups through the
. American engineer and railroad journal . FIfi. 1.— OF THE WAXifill DRAFT GEAR, SHOWING ALL AT BEST. surface of block C in contact with the auxiliary group is anoval of %-in. curvature, these being the curvatures taken by theauxiliary and main groups of plates when the coupler hastraveled 2% ins. in either direction. In Fig. 1, in which all parts are shown at rest, the ends ofthe abutment blocks, D, are not in contact with the auxiliarygroups, A and A\ and the opening admits of the coil springbeing compressed %-in. before pressure is exerted on theauxiliary groups through the abutment blocks, D. In service the gear has three distinct grades of cushion:The first is, when the coil spring has been compressed %-in.,the backward movement of auxiliary group A will slide the. FIG. SHOWING DISPOSITION OF PARTS WHEN THE COUP-LER HAS REACHED ITS LIMIT OF TRAVEL. abutment blocks, D, until they come in contact with the auxil-iary group A, and in this travel about 7,000 lbs. of tire capacityof the coil spring has been utilized. In the second action,the coil spring has been compressed IV4 in. more, and eachauxiliary group has been curved %-in., but in opposite direc-tions, by the abutment block D, and 83,000 lbs. of the blow h^sbeen absorbed on a total travel of 1% in. It may be seen thatthe bearing shoulders of the pocket for the main followersare not at right angles to the wall of the pocket, but divergeat an angle which will allow the followers, B, to be curved%-in. out of a straight line before taking the angle of theshoulder. In the third action, which is shown in Fig. 2, thethimbles in the springs are in contact and the pressure is di-rected along a center line through the thimbles F, and separat-ing blocks C, to the center of the rear followe
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
