Truck trailer with shiftable running gear for load equalizing

Claim 1

IN A TRAILER OF THE CHARACTER DESCRIBED, A BODY FRAME PROVIDED WITH LOCKING PIN SOCKETS SPACED THEREALONG, A WHEEL TRUCK MOVABLE ALONG SAID FRAME, A LOCKING PIN ON SAID TRUCK, RESILIENT MEANS URGING SAID PIN TOWARD LOCKING ENGAGEMENT WITH ONE OF SAID SOCKETS, MANIPULATING MEANS OPERABLE TO RETRACT SAID PIN FROM SUCH ENGAGEMENT, A SHAFT ROTATIVELY MOUNTED ON AND DISPOSED LENGTHWISE OF SAID BODY FRAME, SAID SHAFT BEING PROVIDED WITH A PLURALITY OF RECESSES SPACED LONGITUDINALLY ALONG AND ABOUT SAID SHAFT, A LATCH FOR SAID MANIPULATING MEANS INCLUDING A RECIPROCATIVELY MOUNTED PLUNGER, A FOLLOWER CARRIED BY SAID PLUNGER, SAID FOLLOWER ENGAGING AND RIDING ALONG SAID SHAFT UPON RELATIVE MOVEMENT OF THE TRUCK AND FRAME TO INTERFIT ONE OF SAID RECESSES SO AS TO RELEASE SAID MANIPULATING MEANS, AND MEANS CONNECTED TO SAID SHAFT FOR TURNING THE SHAFT TO A PLACE A PRESELECTED RECESS IN THE PATH OF TRAVEL OF SAID FOLLOWER.