Attachment of rotor blading for axial flow turbo-machines

Claim 1

A BLADE INTERCONNECTING STRUCTURE FOR ROTOR BLADING OF AN AXIAL FLOW TURBO-MACHINE OF THE TYPE WHEREIN THE BLADES OF A CIRCULAR ROW INCLUDE INTEGRAL ENLARGED HEAD PORTIONS ESTABLISHING A CYLINDRICAL ARRAY OF MUTUALLY ABUTTING COVER PLATES, SAID BLADE INTERCONNECTING STRUCTURE COMPRISING A CYLINDRICAL COVER BAND SURROUNDING SAID CYLINDRICAL ARRAY OF COVER PLATES, MEANS PROVIDING A CIRCUMFERENTIAL CHANNEL BETWEEN SAID COVER BAND AND COVER PLATES AND WHICH EXTENDS OVER A PORTION OF THE AXIAL WIDTH OF SAID COVER PLATES, A PAIR OF AXIALLY SPACED CIRCUMFERENTIALLY EXTENDING WELDING SEAMS JOINING SAID COVER BAND TO SAID CYLINDRICAL ARRAY OF COVER PLATES, SAID WELDING SEAMS BEING LOCATED RESPECTIVELY AT EACH SIDE OF SAID CIRCUMFERENTIAL CHANNEL, AND MEANS ESTABLISHING CIRCUMFERENTIALLY SPACED AXIALLY EXTENDING OPENINGS THROUGH SAID WELDING SEAM IN RADIAL ALIGNMENT WITH THE ABUTTING FACES OF THE COVER PLATES OF ADJACENT BLADES, SAID OPENINGS REACHING INWARDLY FROM THE OUTER SIDES OF SAID WELDING SEAMS AND TERMINATING AT AND IN COMMUNICATION WITH SAID CIRCUMFERENTIAL CHANNEL.