Hoist rigging assembly for crane apparatus and the like

Claim 1

A HOIST RIGGING ASSEMBLY FOT A CRANE APPARATUS AND THE LIKE HAVING A SUPPORT FRAME FOR THE ASSEMBLY AND A BOOM MAST COMPRISING A FIRST SHEAVE ASSEMBLY MOUNTED ON A MOUNTING MEANS OPERATIVELY CONNECTABLE TO SAID SUPPORT FRAME, SAID FIRST SHEAVE ASSEMBLY INCLUDING AN INTERMEDIATE SHEAVE HAVING ITS AXIS LYING IN THE VERTICAL PLANE OF MOVEMENT OF SAID BOOM MAST DEFINING A DATUM PLANE, FIRST AND SECOND AXIALLY SPACED SHEAVES HAVING A COMMON AXIS LYING IN A PLANE PARALLEL TO SAID DATUM PLANE AND THIRD AND FOURTH AXIALLY SPACED SHEAVES HAVING A COMMON AXIS LYING IN A PLANE PARALLEL TO SAID DATUM PLANE AND EQUIDISTANT THEREFROM RELATIVE TO THE PLANE INCLUDING THE AXES OF SAID FIRST AND SECOND SHEAVES, A SECOND SHEAVE ASSEMBLY MOUNTED ON MOUNTING MEANS OPERATIVELY CONNECTABLE TO THE UPPER TERMINUS OF SAID BOOM MAST, SAID SECOND SHEAVE ASSEMBLY HAVING FIRST, SECOND, THIRD AND FOURTH SHEAVES HAVING A COMMON AXIS LYING IN SAID DATUM PLANE AND A LINE HAVING ONE END ATTACHABLE TO SAID APPARATUS PASSING OVER THE THIRD SHEAVE OF SAID THIRD SHEAVE ASSEMBLY, UP AND AROUND THE SECOND SHEAVE OF SAID SECOND SHEAVE ASSEMBLY, DOWN AND AROUND THE FOURTH SHEAVE OF SAID FIRST SHEAVE ASSEMBLY, UP AND AROUND THE THIRD SHEAVE OF SAID SECOND SHEAVE ASSEMBLY, DOWN AND AROUND THE INTERMEDIATE SHEAVE OF SAID FIRST SHEAVE ASSEMBLY, UP AND AROUND THE FOURTH SHEAVE OF SAID SECOND SHEAVE ASSEMBLY, DOWN AND AROUND THE SECOND SHEAVE OF SAID FORST SHEAVE ASSEMBLY, UP AND AROUND THE FIRST SHEAVE OF SAID SECOND SHEAVE ASSEMBLY, DOWN AND PASSING OVER THE FIRST SHEAVE OF SAID FIRST SHEAVE ASSEMBLY AND HAVING ITS OPPOSITE END OPERATIVELY CONNECTABLE TO A HOUSING MEANS MOUNTED ON SAID APPARATUS.