Folding scaffold

Claim 1

A COLLAPSIBLE MOBILE SCAFFORD WHEREIN END FRAMES INCLUDING UPRIGHTS EACH PROVIDED WITH A SUPPORTING CASTER ARE CONNECTED BY EXTENSIBLE BRACES WHICH, IN COLLAPSED OR INOPERATIVE CONDITION OF THE SCAFFORD, ARE BROUGHT INTO SUBSTANTIALLY PARALLEL RELATION WITH EACH OTHER AND WITH SAID UPRIGHTS AND, IN OPERATIVE CONDITION OF THE SCAFFORD, EXTEND IN CROSS RELATION BETWEEN AN UPRIGHT OF ONE OF SAID END FRAMES AND AN UPRIGHT OF THE OTHER OF SAID END FRAMES ON THE SAME SIDE OF THE SCAFFORD, EACH OF SAID BRACES COMPRISING A LARGER TUBE OF RELATIVELY LARGE INSIDE DIAMETER, OPEN AT ITS LOWER END, AND A SMALLER TUBE HAVING AN OUTSIDE DIAMETER LESS THAN SAID INSIDE DIAMETER OF THE LARGER TUBE, EACH OF SAID LARGER TUBES BEING ASSEMBLED IN TELESCOPING RELATION WITH ONE OF SAID SMALLER TUBES AND HAVING ITS UPPER END PIVOTALLY CONNECTED TO AN UPPER END OF ONE OF SAID UPRIGHTS AND BEING PIVOTALLY CONNECTED ADJACENT ITS LOWER END TO A LOWER END PORTION OF SAID OTHER LARGER TUBE, AND EACH OF SAID SMALLER TUBES HAVING ITS LOWER END PIVOTALLY CONNECTED TO A LOWER INTERMEDIATE PORTION OF ONE OF SAID UPRIGTHS AND HAVING ITS UPPER END EXTENDING INTO THE OPEN LOWER END OF ONE OF SAID LARGER TUBES, SAID UPPER END OF SAID SMALLER TUBE HAVING A PERFORATED TRANSVERSE WALL PROVIDING A BEARING, AND SAID UPPER END PORTION OF SAID LARGER TUBE HAVING A PERFORATED TRANSVERSE WALL PROVIDING A BEARING COAXIAL WITH THE TUBES AND WITH SAID OTHER BEARING, A REINFORCING AND LOCKING ROD MOUNTED IN SAID LARGER TUBE WITH ITS UPPER END PORTION SUPPORTED IN SAID LARGER TUBE WITH ITS UPPER END PORTION END PORTION SLIDABLY AND ROTATABLY SUPPORTED IN SAID BEARING OF THE SMALLER TUBE, A TRANSVERSE SLOT IN THE WALL OF SAID LARGER TUBE, A LEVER PROJECTING RADIALLY FROM SAID ROD THROUGH SAID SLOT TO RETAIN SAID ROD IN RELATIVELY FIXED POSITION LONGITUDINALLY IN SAID LARGER TUBE AND PROVIDING MEANS ACCESSIBLE OUTSIDE SAID LARGER TUBE FOR ROTATING SAID ROD ON ITS AXIS IN SAID BEARINGS TO AND FROM LOCKING ENGAGEMENT WITH SAID SMALLER TUBE, SAID ROD HAVING ADJACENT ITS LOWER END A RADIALLY EXTENDING LOCKING AND STOP PIN POSITIONED TO BE ENGAGED BY SAID TRANSVERSE WALL OF SAID SMALLER TUBE TO LIMIT THE EXTENT OF MOVEMENT OF SAID SMALLER TUBE IN RELATION TO SAID LARGER TUBE, AND SAID SMALLER TUBE HAVING ANGULARLY SPACED INWARDLY EXTENDING LUGS SPACED DOWNWARDLY FROM SAID BEARING WALL OF THE SMALLER TUBE AND POSITIONED TO BE PASSED BY SAID LOCKING AND STOP PIN WHEN THE LARGER ABD THE SMALLER TUBE ARE MOVING INTO AND OUT OF EXTENDED POSITION AND TO BE ENGAGED BY SAID PIN WHEN SAID LOCKING ROD IS ROTATED TO LOCKING POSITION.