Locking device for turbine rotor blades

Claim 1

A TURBINE ROTOR HAVING AXIAL SPACED OPPOSITE FACES, SPACED, AXIALLY EXTENDING PERIPHERALLY DOVETAILED GROOVES THEREIN DEFINING PROJECTIONS BETWEEN THE ADJACENT GROOVES, EACH OF SAID PROJECTIONS HAVING AN AXIAL CHANNEL IN THE PERPHERAL SURFACE THEREOF EXTENDING TO THE OPPOSITE AXIAL FACES OF THE ROTOR, SAID CHANNELS HAVING IDENTICALLY OPPOSED CIRCUMFERENTIALLY EXTENDING RECESSES COMMUNICATING WITH EACH OF SAID CHANNELS, BLADES HAVING DOVETAILED GROOVE PROJECTIONS INTERENGAGING SAID DOVETAILED GROOVES IN SAID ROTOR AND HAVING CIRCUMFERENTIALLY EXTENDING PLATFORMS OVERLYING SAID PROJECTIONS AND THE CHANNELS AND RECESSES THEREIN, EACH OF SAID PLATFORMS HAVING AXIALLY SPACED ENDS TERMINATING IN THE CORRESPONDING PLANE OF THE AXIAL OPPOSED ENDS OF THE ROTOR, A RECESS IN EACH END OF THE SAID PLATFORM OVERLYING SAID PROJECTIONS AND THE CHANNELS THEREIN AND COMPLEMENTARY TO SAID CHANNELS, A KEY IN LEACH OF SAID CHANNELS HAVING PROJECTIONS THEREON FITTING THE IDENTICALLY OPPOSED RECESSES AND UNDERLYING SAID PLATFORMS, AND A PROJECTION IN EACH END OF SAID KEY FITTING THE RECESSES IN EACH END OF THE PLATFORM TO PREVENT THE BLADES FROM BEING AXIALLY DISPLACED FROM THE ROTOR.