Control mechanism for adjustable gas turbine nozzle

Claim 1

IN A MULTIPLE STAGE GAS TURBINE ENGINE HAVING A COMPRESSOR DRIVING ROTOR IN ONE STAGE AND A POWER ROTOR IN A SUBSEQUENT STAGE, AN AIR COMPRESSOR DRIVEN BY SAID COMPRESSOR DRIVING ROTOR FOR SUPPLYING COMBUSTION AIR TO SAID ENGINE, MEANS FOR SUPPLYING MOTIVE GASES TO SAID ROTORS TO ROTATE THE SAME, MANUALLY POSITIONABLE THROTTLE MEANS FOR SUPPLYING FUEL TO SAID ENGINE, MEANS FOR CONDUCTING MOTIVE GASES TO SAID ROTORS TO ROTATE THE SAME, ADJUSTABLE NOZZLE MEANS INTERPOSED IN THE PATH OF SAID GASES AND SHIFTABLE TO ADJUST THE ANGLE OF CONTACT THEREWITH TO VARY THE POWER IMPARTED TO SAID POWER ROTOR BY SAID GASES, ONE OF THE POSITIONS OF ADJUSTMENT OF SAID NOZZLE MEANS COMPRISING AN ACCELERATION POSITION FOR IMPARTING COMPARATIVELY LOW POWER TO SAID POWER ROTOR WHILE CAUSING A COMPARATIVELY HIGH POWER TO BE IMPARTED TO SAID COMPRESSOR ROTOR, CONTROL MEANS FOR ADJUSTING SAID NOZZLE MEANS INCLUDING PRESSURE RESPONSIVE PISTON MEANS OPERATIVELY CONNECTED TO SAID NOZZLE MEANS, A SERVO VALVE MECHANICALLY MOVABLE TO VARIOUS POSITIONS FOR ADJUSTING THE POSITION OF SAID PRESSURE RESPONSIVE MEANS IN ACCORDANCE THEREWITH, LEVER MEANS RESPONSIVE TO THE POSITION OF SAID THROTTLE MEANS FOR ABUTTING AGAINST SAID SERVO VALVE IN ORDER TO ADJUST THE POSITION OF SAID SERVO VALVE AND SAID PISTON MEANS AND ADJUST SAID NOZZLE MEANS IN ACCORDANCE WITH THE POSITION OF SAID THROTTLE MEANS, AND ADDITIONAL PRESSURE RESPONSIVE ABUTMENT MEANS EFFECTIVE ONLY DURING PERIODS OF ENGINE ACCELERATION FOR ABUTTABLY ENGAGING AND VARYING THE POSITION OF SAID LEVER MEANS FROM THAT POSITION INDICATED BY THE POSITION OF SAID THROTTLE MEANS DURING SUCH PERIODS OF ENGINE ACCELERATION.