Articulated railway vehicle

Claim 1

IN A SERIES OF SEMI-PERMANENTLY CONNECTED RAILWAY CARS ADAPTED TO TRAVERSE AN S-SHAPED TRACK SECTION OF KNOWN CURVATURE, THE COMBINATION COMPRISING: (A) A CAR-TO-CAR COUPLING COMPRISING UNIVERSALLY PIVOTALLY CONNECTED ELEMENTS, EACH ELEMENT FIXED TO AN ADJACENT CAR AND CONNECTED WITH EACH OTHER IN RADIALLY FIXED RELATION WITH RESPECT TO A CENTER OF RELATIVE PIVOTAL MOVEMENT; (B) CAR TRUCK MECHANISM UNDER THE END PORTION OF EACH CAR ADJACENT SAID COUPLING COMPRISING: (1) ONE CAR TRUCK MEMBER ATTACHED TO CAR BODY AND FRAME STRUCTURE IN SUBSTANTIALLY IMMOVABLE RELATIONSHIP IN RESPECT TO THE HORIZONTAL TRANSVERSE DIRECTION OF THE RESPECTIVE CAR, (2) A TRACK-FOLLOWING TRUCK PORTION INCLUDING A WHEEL ASSEMBLY ADAPTED TO MAINTAIN TRACKING AND ROLLING RELATION WITH A TRACK, AND A SECOND CAR TRUCK MEMBER ATTACHED TO SAID ASSEMBLY IN JOURNAL-BEARING RELATION THEREWITH, (3) RESILIENT MEANS DISPOSED BETWEEN THE TWO MEMBERS FOR TRANSMITTING CAR LOADS FROM THE FIRST MEMBER TO THE SECOND MEMBER, SAID MEMBERS HAVING RELATIVE FREEDOM OF MOVEMENT IN RANGES CORRESPONDING TO SAID CURVATURE IN SAID TRANSVERSE DIRECTION TO MAINTAIN SAID WHEEL ASSEMBLIES IN TRACKING RELATION WITH SAID TRACK SECTIONS.