Tower crane

Claim 1

IN A TOWER CRANE FOR HOISTING AND DISTRIBUTING BUILDING MATERIALS SUCH AS CONCRETE IN CONJUNCTION WITH THE CONSTRUCTION OF A BUILDING OR OTHER STRUCTURE, THE COMBINATION OF A TOWER PROVIDED WITH MEANS ADJACENT THE LOWER END THEREOF FOR SUPPORTING IT WITHIN A VERTICAL OPEN SHAFT OF THE STRUCTURE BEING CONSTRUCTED, ELEVATING MEANS ASSOCIATED WITH THE LOWER END OF SAID TOWER FOR RAISING SAID TOWER WITHIN THE SHAFT AS CONSTRUCTION PROGRESSES, A GENERALLY HORIZONTALLY HOIST JIB MOUNTED ON SAID TOWER AND EXTENDING LATERALLY PRIMARILY FROM ONE SIDE OF THE FRONT OF SAID TOWER TO OVERLIE AN AREA BEYOND A FACE WALL OF THE STRUCTURE, SAID JIB PROVIDING A TRAM RAIL EXTENDING THEREALONG, A TROLLEY ENGAGED WITH SAID RAIL TO BE SHIFTABLE ALONG THE JIB AND HAVING HOIST MEANS ASSOCIATED THEREWITH FOR HOISTING BUILDING MATERIALS FROM THE AREA BEYOND THE FACE WALL OF THE STRUCTURE, A MATERIAL RECEIVING HOPPER CARRIED BY SAID TOWER ON GENERALLY THE OPPOSITE SIDE OF SAID TOWER FROM THE PRIMARY LATERAL EXTENT OF SAID JIB AND AT A LEVEL BELOW SAID JIB TO RECEIVE MATERIAL ELEVATED BY SAID HOIST MEANS AND SHIFTED ON SAID RAIL TO DISCHARGE INTO SAID HOPPER, A DISTRIBUTING BOOM CARRIED ON THE SAID OPPOSITE SIDE OF SAID TOWER AND MOUNTED TO BE SWINGABLE IN A GENERALLY HORIZONTAL PLANE, SAID DISTRIBUTING BOOM INCLUDING A CONVEYOR HAVING ONE END DISPOSED TO RECEIVE MATERIAL DISCHARGED FROM SAID HOPPER AND EXTENDING OUTWARDLY FROM THE TOWER ALONG SAID DISTRIBUTING BOOM TO CARRY THE MATERIAL OUTWARDLY FROM THE TOWER FOR DISTRIBUTION AT DESIRED POINTS SPACED RADIALLY AND CIRCUMFERENTIALLY OF THE TOWER IN CONJUNCTION WITH CONSTRUCTION THE STRUCTURE.