Self-elevating building crane

Claim 1

A CLIMBING SUPPORT FOR A CRANE FOR USE WITHIN A BUILDING FRAMEWORK OF COLUMNS, BEAMS AND GRIDERS DEFINING SEVERAL FLOOR LEVELS AT A VERTICAL AIR SHAFT, SUCH CRANE SUPPORT COMPRISING A VERTICAL CAGE HAVING A TOP LEVEL FRAME AND A BOTTOM LEVEL FRAME, AND HAVING EXTERNAL HORIZONTAL DIMENSIONS TO PERMIT THE CAGE TO FIT MOVABLY WITHIN THE SPACINGS OF THE BEAMS AND THE GIRDERS TO ENABLE THE CAGE TO MOVE FREELY IN A VERTICAL PATH RELATIVE TO SAID SEVERAL FLOORS DEFINED BY THE BEAMS AND THE GIRDERS AND WITHIN THE FULL HEIGHT OF THE AIR SHAFT; A TOP CAGE HOUSING STRUCTURALLY SECURED ALONG EACH SIDE END OF THE TOP LEVEL FRAME OF SAID CAGE AND OPEN AT THE BOTTOM FOR ACCESS TO SAID HOUSING; A BOTTOM CAGE HOUSING STRUCTURALLY SECURED ALONG EACH SIDE END OF THE BOTTOM LEVEL FRAME AND OPEN AT THE TOP FOR ACCESS TO SAID HOUSING; SHAFT MEANS SUPPORTED IN EACH SAID END HOUSING; ROTATABLE PULLEY MEANS SUPPORTED ON EACH SAID SHAFT MEANS WITHIN EACH SAID END HOUSING; A PLATFORM TO SUPPORT AND CARRY A CRANE, SAID PLATFORM BEING DISPOSED HORIZONTALLY WITHIN THE CAGE, AND HAVING EXTERNAL HORIZONTAL DIMENSIONS TO ENABLE THE CAGE TO MOVE FREELY IN A VERTICAL DIRECTION TO A SELECTED LEVEL RELATIVE TO AND WITHIN THE CAGE; AN UPPER PLATFROM HOUSING STRUCTURALLY SECURED TO THE TOP OF SAID PLATFROM ALONG EACH SIDE EDGE OF SAID PLATFROM AND ALIGNED DIRECTLY BENEATH THE CORRESPONDING TOP HOUSING ALONG THE RESPECTIVE SIDE ENDS OF SAID CAGE, EACH SAID UPPER PLATFROM HOUSING BEING OPEN AT THE TOP FOR ACCESS TO SAID UPPER PLATFROM HOUSING; SHAFT MEANS SUPPORTED IN EACH SAID UPPER PLATFROM HOUSING; ROTATABLE PULLEY MEANS SUPPORTED ON EACH SAID SHAFT MEANS WITHIN EACH SAID TOP PLATFROM HOUSING; A LOWER PLATFROM HOUSING STRUCTURALLY SECURED TO THE BOTTOM OF SAID PLATFROM ALONG EACH RESPECTIVE SAID SIDE EDGE OF SAID PLATFROM, EACH SAID LOWER PLATFROM HOUSING BEING OPEN AT THE BOTTOM FOR ACCESS TO SAID HOUSING; SHAFT MEANS SUPPORTED IN EACH SAID LOWER PLATFROM HOUSING; ROTATABLE PULLEY MEANS SUPPORTED ON EACH SAID SHAFT MEANS WITHIN EACH SAID LOWER PLATFROM HOUSING;