Transmission for choosing the mode of steering on a vehicle with two steerable axles

Claim 1

IN A VEHICLE FOR MOVING EITHER FORWARD, DIAGONALLY SIDEWAYS, OR FOR TURNING IN A SHORT RADIUS, A MANUAL STEERING WHEEL, A FRONT WHEEL STEERING GEAR ASSEMBLY, A REAR WHEEL STEERING GEAR ASSEMBLY, EACH OF THE ASSEMBLIES HAVING A CENTRAL SHAFT, MECHANISM FOR CONNECTING THE STEERING WHEEL TO THE CENTRAL SHAFT OF THE FRONT WHEEL STEERING GEAR ASSEMBLY INCLUDING A DRIVE SHAFT CONNECTED TO THE CENTRAL SHAFT OF THE FRONT WHEEL STEERING GEAR ASSEMBLY AND CARRYING A WIDE TOOTH DRIVING GEAR RESPONSIVE AT ALL TIMES TO ROTATION OF THE STEERING WHEEL, A ROTATING SHAFT OPERATIVELY CONNECTED AT ITS OUTER END TO THE CENTRAL SHAFT OF THE REAR WHEEL STEERING GEAR ASSEMBLY AND CARRYING A SPOOL GEAR, AN IDLER GEAR IN CONSTANT MESH WITH ONE OF THE RINGS OF TEETH OF THE SPOOL GEAR, AN ARBOR COAXIAL WITH THE ROTATING SHAFT PROXIMATE THE INNER END THEREOF, A STATIONARY CENTRAL SHAFT PARALLEL TO THE ARBOR AND HAVING THEREON A SLIDING GEAR IN CONSTANT MESH WITH THE WIDE TOOTHED DRIVING GEAR AND MOVABLE TO THREE POSITIONS, A CENTRAL POSITION IN WHICH THE SLIDING GEAR RUNS IDLE, A SIDE POSITION IN WHICH THE SLIDING GEAR DRIVES THE SPOOL GEAR THROUGH THE OTHER RING OF TEETH THEREOF IN ONE DIRECTION OF ROTATION, AND AN OPPOSITE SIDE POSITION IN WHICH THE SLIDING GEAR MESHES WITH THE IDLER GEAR TO DRIVE THE SPOOL GEAR AND REAR WHEEL STEERING GEAR ASSEMBLY IN OPPOSITE DIRECTION OF ROTATION.