Tracking truck

Claim 1

IN A TRACKING TWO-WHEEL RAILWAY TRUCK, COMPRISING: (A) A PEDESTAL FRAME HAVING AN UPPER BODY PORTION ADAPTED FOR MOUNTING ON A RAILWAY CAR WITH ITS LENGTH PARALLEL TO THAT OF THE CAR, AND A PAIR OF LONGITUDINALLY SPACED HOLLOW GUIDE COLUMNS CO-DEPENDING THEREFROM DEFINING THEREBETWEEN A PEDESTAL OPENING; (B) A JOURNAL SADDLE HAVING A BASE AND A CENTRALLY LOCATED JOURNAL HOUSING EXTENDING UPWARDLY THEREFROM INTERPOSED IN VERTICAL GUIDE RELATION AND LONGITUDINAL SPACED RELATION WITH SAID GUIDE COLUMNS IN SAID PEDESTAL OPENING FOR HOUSING THE JOURNAL END OF A WHEEL AND AXLE ASSEMBLY ALONG A HORIZONTAL JOURNAL AXIS OF FIXED RELATION WITH SAID HOUSING, SAID PEDESTAL OPENING HAVING A LONGITUDINAL DIMENSION EXCEEDING THE LONGITUDINAL WIDTH OF THE HOUSING SO AS TO PERMIT SUBSTANTIAL ANGULAR MOTION CAPABILITY OF THE AXLE AND SADDLE ASSEMBLY RELATIVE TO THE PEDESTAL FRAME DURING CURVE NEGOTIATION; (C) THE FRAME AND THE SADDLE HAVING VERTICALLY ALIGNED UPPER AND LOWER LOAD SUPPORT SPRING SEATS, RESPECTIVELY, IN BOTH FORE AND AFT SPACED RELATION WITH SAID COLUMNS AND SAID HOUSING; (D) VERTICALLY REACTING LOAD SUPPORT SPRING MEANS DISPOSED BETWEEN SAID SEATS TO SUPPORT SAID FRAME RELATIVE TO THE SADDLE; AND (E) A CUSHION BIASED FRICTION UNIT DISPOSED BETWEEN EACH OF SAID COLUMNS AND THE HOUSING FOR DAMPING RELATIVE LATERAL MOVEMENT AND RELATIVE VERTICAL MOVEMENT OF SAID SADDLE AND SAID FRAME.