Railroad car trucks with spring biased side bearings

Claim 1

IN A RAILROAD CAR TRUCK, TWO PARALLEL, WINDOWED, SPACED APART FRAMES, A TUBULAR TRANSOM GENERALLY RECTANGULAR IN CROSS SECTION EXTENDING AT EACH END INTO AND ANCHORED IN ONE OF THE WINDOWS, THE TOP WALL OF THE TRANSOM BEING APERTURED ADJACENT EACH SIDE FRAME, A VERTICALLY DISPOSED STUB BOLSTER PROJECTING UPWARDLY THROUGH AND GUIDED FOR VERTICAL MOVEMENT IN EACH APERTURE, LOAD CARRYING SPRINGS IN THE TRANSOM, SUPPORTING THE STUB BOLSTERS, A CAR BOLSTER ABOVE THE TRANSOM, INTER-PENETRATING MALE AND FEMALE CENTER PLATES BETWEEN IT AND THE TRANSOM, THE CAR BOLSTER RESTING UPON AND BEING ENTIRELY SUPPORTED BY THE STUB BOLSTERS, THE SIDE WALLS OF THE TRANSOM BEING SLOTTED IN LINE WITH THE BOLSTERS, EQUALIZING RODS ROTATABLY MOUNTED ON THE TRANSOM GENERALLY PARALLEL THEREWITH, EQUALIZING LEVERS RIGIDLY ATTACHED TO THE RODS, ENTERING THE TRANSOM THROUGH SAID SLOTS AND IN PIVOTAL RELATIONSHIP TO THE STUB BOLSTERS.