Turbine

Claim 1

A GAS TURBINE COMPRISING A CASING HAVING A SIDE WALL AND WALL MEANS FOR DIRECTING GAS IN A SPIRAL, A ROTOR ROTATABLY MOUNTED WITHIN SAID CASING WITH THE PERIPHERY THEREOF DEFINING A SPIRAL WITH THE OUTER WALL OF SAID CASING, SAID ROTOR HAVING A PLURALITY OF RADIALLY EXTENDING BLADES SPACED ANGULARLY TO DEFINE ENTRANCE OPENINGS AT THEIR PERIPHERIES, A PLURALITY OF OPENINGS DEFINED IN SAID SIDE WALL OF SAID CASING ADJACENT THE PERIPHERY OF SAID ROTOR AT CIRCUMFERENTIALLY SPACED LOCATIONS, AND A CONTROL RING, A PLURALITY OF CIRCUMFERENTAILLY SPACED COVERING ELEMENTS CORRESPONDING IN NUMBER TO THE NUMBER OF SAID OPENINGS AND FORMING A UNITARY STRUCTURE WITH SAID RING, SAID COVERING ELEMENTS BEING LOCATED AT CIRCUMFERENTIALLY SPACED LOCATIONS AROUND THE PERIPHERY OF SAID ROTOR AND BEING CIRCUMFERENTIALLY ELONGATED SUFFICIENTLY TO COVER THE ENTRANCE OPENINGS BETWEEN ADJACENT ONES OF SAID ROTOR BLADES AND HAVING AN INNER SURFACE CONCENTRIC TO THE AXIS OF ROTATION OF SAID ROTOR BLADES AND HAVING A LEADING AND TRAILING EDGE, THE OUTER SURFACE BETWEEN SAID EDGES BEING DEFINED BY AN UNBROKEN, SMOOTH, CONTINUOUSLY CHANGING CURVED SURFACE, SAID CONTROL MEANS BEING AXIALLY MOVABLE IN ONE DIRECTION TO POSITION SAID COVERINGS WITHIN SAID CASING ADJACNET THE PERIPHERY OF SAID ROTOR BETWEEN COVERING A PORTION OF THE PERIPHERY OF SAID ROTOR BETWEEN A PLURALITY OF BLADES FOR REGULATING THE OPERATING CHARACTERISTICS OF SAID TURBINE AND AXIALLY MOVABLE IN AN OPPOSITE DIRECTION TO UNCOVER THE PERIPHERY OF SAID ROTOR.