Dampened lateral motion freight car truck bolster

Claim 1

IN A SELF-ALIGNING SPRING PLANKLESS RAILWAY CAR TRUCK, SPACED SIDE FRAMES SUPPORTED AT THEIR ENDS UPON WHEEL AND AXLE ASSEMBLIES, SAID SIDE FRAMES COMPRISING TENSION AND COMPRESSION MEMBERS INTERCONNECTED BY SPACED VERTICAL COLUMNS TO DEFINE WINDOWS, SPRING GROUPS SEATED ON SAID TENSION MEMBERS, A TRUCK BOLSTED INTERCONNECTING SAID SID FRAMES AND RESILIENTLY SUPPORTED ON SAID SPRING GROUPS, SAID BOLSTER HAVING A TOP WALL AND SPACED SIDE WALLS, RESILIENT PADS MOUNTED ON SAID BOLSTER, AND AUXILIARY BOLSTER OF INVERTED U-SHAPE HAVING A TOP ELEMENT AND DEPENDING SIDE WALL ELEMENTS, SUPPORTED ON THE TRUCK BOLSTER IN STRADDLING RELATION THERETO WITH ITS TOP ELEMENT DIRECTLY ENGAGING SAID RESILIENT PADS AT ITS ENDS AND SUPPORTED THEREBY, AND ITS SIDE WALL ELEMENTS DEPENDING CLOSELY ADJACENT THE SPACED SIDE WALLS OF THE TRUCK BOLSTER, ONE OF THE DEPENDING SIDE WALL ELEMENTS OF THE AUXILIARY BOLSTER AND ONE SIDE WALL OF THE TRUCK BOLSTER HAVING IN TERFACING FRICTION SURFACES AT THE ENDS OF THE AUXILIARY BOLSTER LYING IN VERTICAL PANES EXTENDING LONGITUDINALLY