Gas turbine control

Claim 1

A GAS TURBINE AND SINGLE PNEUMATIC CONTROL THEREFOR ADAPTED TO SHUT DOWN THE TURBINE IN EVENT OF ECCENTRIC TURBINE ROTATION AS A RESULT OF A BEARING FAILURE OR IN THE EVENT OF OVERSPEED OF THE TURBINE COMPRISED OF: A RADIAL-FLOW TURBINE WHEEL HAVING A SHAFT EXTENDING FROM ONE SIDE AND BLADES AND AN AXIAL PROJECTION ON THE OTHER SIDE, BEARING MEANS SUPPORTING SAID TURBINE WHEEL SHAFT FOR NORMAL ROTATION IN A FIXED TRANSVERSE PLANE, A TUBULAR EXHAUST DUCT ENCASING SAID TURBINE BLADES AND SAID TURBINE AXIAL PROJECTION, AN ANNULAR MANIFOLD CONSTRUCTED AND ARRANGED TO SUPPLY GAS TO SAID TURBINE BLADES, A GAS SUPPLY PIPE CONNECTED TO SAID MANIFOLD AND HAVING A BUTTERFLY VALVE MOUNTED THEREIN, PNEUMATIC MEANS FLUIDLY CONNECTED TO SAID GAS SUPPLY PIPE UPSTREAM OF SAID BUTTERFLY VALVE AND CONSTRUCTED TO OPEN SAID BUTTERFLY VALVE WHEN SUBJECT TO A PREDETERMINED-PRESSURIZED GAS FROM SAID GAS SUPPLY PIPE, A PLURALITY OF TUBES PROJECTING FROM SAID EXHAUST DUCT AT LEAST THREE EQUI-SPACED LOCATIONS AND TERMINATING IN FRANGIBLE TIPS ADJACENT THE BLADES OF SAID TURBINE WHEELS, SAID FRANGIBLE TIPS SEALING THE ENDS OF SAID TUBES AND BEING CONSTRUCTED TO BREAK WHEN CONTACTED BY SAID BLADES UPON ECCENTRIC ROTATION OF SAID TURBINE WHEEL TO PROVIDE AN OUTLET FOR SAID TUBES, VENT CONDUIT MEANS CONNECTING SAID TUBES TO SAID PNEUMATIC MEANS TO PROVIDE A VENT FLOW PATH FROM SAID PNEUMATIC MEANS TO SAID EXHAUST DUCT WHEN ONE OF SAID FRANGIBLE TIPS IS BROKEN, SAID PNEUMATIC MEANS BEING CONSTRUCTED TO CLOSE SAID BUTTERFLY VALVE WHEN SAID VENT FLOW PATH IS PROVIDED UPON BREAKING OF ONE OF SAID FRANGIBLE TIPS AS A RESULT OF ECCENTRIC ROTATION OF SAID TURBINE WHEEL, A GAS ESCAPE CONDUIT HAVING AN OPEN END AXIALLY-ALIGNED WITH AND SPACED FROM SAID AXIAL PROJECTION OF SAID TURBINE WHEEL, SAID GAS ESCAPE CONDUIT BEING CONNECTED TO SAID PNEUMATIC MEANS TO PROVIDE A GAS ESCAPE FLOW PATH TO SAID EXHAUST DUCT DURING NORMAL OPERATION, A SPEED-RESPONSIVE PLUNGER HAVING CENTRIFUGAL FLYWEIGHTS AXIALLY MOUNTED IN THE PROJECTION OF SAID TURBINE WHEEL, SAID PLUNGER BEING MOVABLE TO CLOSE SAID GAS ESCAPE CONDUIT WHEN SAID TURBINE WHEEL ROTATES ABOVE A PREDETRMINED SPEED, SAID PNEUMATIC MEANS BEING CONSTRUCTED TO CLOSE SAID BUTTERFLY VALVE WHEN SAID PLUNGER CLOSES SAID GAS ESCAPE CONDUIT WHEREBY SAID TURBINE IS PREVENTED FROM OVERSPEEDING.