Eight wheel railway truck with span bolster

Claim 1

IN A RAILWAY TRUCK CONSTRUCTION INCLUDING A PAIR OF TRUCK FRAMES, AXLES ASSOCIATED WITH EACH FRAME, AND WHEELS ASSOCIATED WITH EACH AXLE, AND INCLUDING A SPAN BOLSTER INTERCONNECTING SAID TRUCK FRAMES, SAID BOLSTER INCLUDING A CENTER SUPPORT PORTION ADAPTED TO BE PIVOTALLY CONNECTED TO THE SUPERSTRUCTURE SUPPORTED BY SAID CONSTRUCTION, THE IMPROVEMENT COMPRISING MEANS FOR SECURING SAID BOLSTER TO SAID TRUCK FRAMES, SAID BOLSTER INCLUDING LONGITUDINALLY EXTENDING SECTIONS FORMED ON EITHER SIDE OF SAID CENTER SUPPORT PORTION, VERTICAL WALLS EXTENDING TRANSVERSELY ACROSS SAID LONGITUDINALLY EXTENDING SECTIONS ADJACENT THE ENDS THEREOF, AND OPPOSITELY FACING VERTICAL WALLS FORMED IN SAID TRUCK FRAMES, RESILIENT MEANS INTERPOSED BETWEEN SAID VERTICAL WALLS ADAPTED TO REACT TO LONGITUDINALLY APPLIED FORCES, HORIZONTALLY DISPOSED SURFACES DEFINED BY SAID LONGITUDINALLY EXTENDING SECTIONS, AND OPPOSITELY FACING HORIZONTALLY DISPOSED SURFACES DEFINED BY SAID TRUCK FRAMES, AND ADDITIONAL RESILIENT MEANS INTERPOSED BETWEEN SAID HORIZONTALLY DISPOSED SURFACES ADAPTED TO REACT TO SHEAR FORCES AND TO VERTICALLY APPLIED FORCES.