Steerable trailer

Claim 1

AN AUTOMATIC STEERING DEVICE FOR A TRAILER TYPE VEHICLE HAVING A FRAME, AN AXLE ASSEMBLY MOUNTED FOR ROTATION ON ONE END OF SAID FRAME, MEANS CARRIED BY SAID FRAME FOR SUPPORTING THE OTHER END OF SAID FRAME, AND A LOAD CARRYING MEANS ROTATABLY MOUNTED ON SAID FRAME, SAID STEERING DEVICE COMPRISING: A ROTATABLE SHAFT, MOUNTED ON SAID FRAME IN A VERTICAL POSITION PARALLEL TO THE AXES OF ROTATION OF BOTH SAID AXLE ASSEMBLY AND SAID LOAD CARRYING MEANS; MEANS FOR CONNECTING THE UPPER END OF SAID SHAFT TO SAID LOAD BED; A LEVER MEANS ATTACHED TO THE LOWER END OF SAID SHAFT, SAID LEVER MEANS COMPRISING A PAIR OF ARMS EXTENDING OUTWARDLY FROM OPPOSITE SIDES OF SAID SHAFT AND SUBSTANTIALLY TRANSVERSE TO THE LONGITUDINAL AXIS OF SAID TRAILER FRAME, AND SLOT MEANS EXTENDING ALONG A PORTION OF EACH SAID ARM; PIN MEANS RETAINED IN AND MOVABLE ALONG SAID SLOT MEANS IN EACH SAID ARM; SHAFT MEANS THREADED TO SAID PIN MEANS FOR SIMULTANEOUSLY MOVING BOTH OF SAID PIN MEANS ALONG SAID SLOTS; A CABLE LINKAGE MEANS ATTACHED AT ONE END TO EACH OF SAID PIN MEANS ON EACH OF SAID ARMS, EACH SAID CABLE MEANS BEING ATTACHED AT ITS OTHER END TO SAID AXLE ASSEMBLY, AND BEING OPERATIVELY CONNECTED THEREWITH TO PROVIDE STEERING FORCES AT A PREDETERMINED DISTANCE FROM THE AXIS OF ROTATION OF SAID AXLE ASSEMBLY.