Railroad car stabilizing limit and side bearing means

Claim 1

A RAILROAD CAR SIDE BEARING ASSEMBLY, INCLUDING OPPOSED FRICTION PLATES ON THE CAR BODY AND THE CAR TRUCK, LOAD SUPPORTING SPRING MEANS BETWEEN THE CAR BODY AND THE TRUCK, BIASING THE PLATES INTO CONSTANT FRICTIONAL CONTACT WITH EACH OTHER AS THE CAR BODY ROCKS WITH RESPECT TO THE TRUCK, ANTI-FRICTION MEANS, NORMALLY OUT OF CONTACT WITH BOTH PLATES, BETWEEN THE CAR BODY AND THE TRUCK, SO POSITIONED THAT AS THE CAR ROCKS WITH RESPECT TO THE TRUCK, MOVING THE PLATES TOWARD THE BASE WHICH SUPPORTS THE SPRING MEANS AND INCREASING THE PRESSURE ON THE SPRING MEANS, A POINT IS REACHED AT WHICH THE ANTI-FRICTION MEANS ARE CONTACTED BY ONE OF THE PLATES TO POSITIVELY INHIBIT FURTHER MOVEMENT OF SUCH PLATE TOWARD THE BASE AND PREVENT ANY INCREASE IN THE SPRING CARRIED LOAD AND IN THE PRESSURE BETWEEN THE FRICTION PLATES, THE LOAD RESULTING FROM THE ROCKING OF THE CAR BODY WITH RESPECT TO THE TRUCK BEING THEREAFTER DIVIDED BETWEEN THE SPRING MEANS AND THE ANTI-FRICTION PLATES.