Scaffold

Claim 1

A PORTABLE SCAFFOLDING SUPPORT ARRANGED TO BE USED IN PAIRS FOR SUPPORTING UPPER AND LOWER BRIDGING PLANKS ON OPPOSITE SIDES OF UPRIGHT SUPPORTS COMPRISING A TUBULAR UPRIGHT MEMBER, A BASE REMOVABLY SECURED TO THE BOTTOM OF SAID UPRIGHT SUPPORTING IT IN AN UPRIGHT POSITION, A REMOVABLE CARRIER RECIPROCALLY MOUNTED ON SAID UPRIGHT MEMBER, SAID CARRIER INCLUDING AN UPPER OUTWARDLY EXTENDING PLANK SUPPORT PROJECTING LATERALLY FROM ONE SIDE OF SAID CARRIER AND A LOWER PLANK SUPPORT EXTENDING OUTWARDLY FROM SAID CARRIER IN THE DIRECTION OPPOSITE SAID UPPER PLANK SUPPORT, AN UPPER PAIR OF ROLLERS JOURNALED IN SAID CARRIER BEARING AGAINST OPPOSITE SIDES OF SAID UPRIGHT AND ONE OF SAID UPPER ROLLERS BEING MOUNTED ON THE SIDE OPPOSITE SAID UPPER PLANK SUPPORT, A LOWER PAIR OF ROLLERS JOURNALLED IN SAID CARRIER BELOW SAID UPPER ROLLERS AND BEARING AGAINST SAID UPRIGHT, AND ONE OF SAID LOWER ROLLERS BEING MOUNTED ON THE SIDE OPPOSITE SAID LOWER PLANK SUPPORT WHEREBY SAID CARRIER RIDES ON SAID ROLLERS ON SAID UPRIGHT, FIRST PULLEY MEANS MOUNTED ADJACENT THE TOP OF SAID UPRIGHT, SECOND PULLEY MEANS MOUNTED ON SAID CARRIER, ROPE MEANS REEVED AROUND SAID PULLEYS, ROPE RETRIEVE MEANS MOUNTED ON SAID CARRIER INCLUDING A MOVABLE CRANK HANDLE, ONE END OF SAID ROPE MEANS BEING SECURED TO SAID RETRIEVE MEANS AND THE OTHER END CONNECTED TO SAID CARRIER FOR RAISING AND LOWERING SAID CARRIER ALONG SAID UPRIGHT, SAID HANDLE BEING MOVABLE FROM AN OUTSIDE POSITION FOR TURNING SAID ROPE RETRIEVE MEANS TO AN INSIDE POSITION AGAINST SAID CARRIER FOR PREVENTING UNWINDING OF THE ROPE THEREFROM, A CHAIN SECURED TO THE TOP OF SAID UPRIGHT, A BRACKET INCLUDING AN EYE AND SLOT MOUNTED ON SAID CARRIER FOR RECEPTION OF SAID CHAIN AND PROVIDE TEMPORARY LOCK MEANS TO PREVENT DOWNWARD MOVEMENT OF SAID CARRIER, AND MEANS FOR LOCKING SAID CHAIN IN SAID SLOT AND EYE.