Fuel control in internal-combustion turbine engines

Claim 1

AN INTERNAL-COMBUSTION TURBINE EQUIPPED WITH AN AIR-INTAKE COMPRESSOR HAVING AN OUTLET CONSTITUTING A SOURCE OF PRESSURE VARIABLE ACCORDING TO ENGINE SPEED AND A FUEL-CONTROL DEVICE COMPRISING: A HOUSING HAVING A CYLINDRICAL BORE, A FUEL-INLET CONNECTION, AND A FUEL-DELIVERY CONNECTION BOTH SAID CONNECTIONS COMMUNICATING WITH SAID BORE AT LONGITUDINALLY SPACED POINTS; A THROTTLE VALVE INCLUDING TWO SLIDE ELEMENTS, ONE FORMING A CYLINDRICAL SLEEVE SEALINGLY FITTED IN SAID BORE FOR ROTATION ABOUT ITS AXIS AND LONGITUDINAL MOVEMENT IN SAID BORE, SAID SLEEVE HAVING FIRST AND SECOND PORT MEANS EXTENDING THROUGH THE WALL OF THE SLEEVE AT LONGITUDINALLY SPACED POINTS, SAID PORT MEANS BEING IN RESPECTIVE CONTINUOUS COMMUNICATION WITH SAID TWO CONNECTIONS, AND THE OTHER ELEMENT FORMING A VALVE SPOOL SEALINGLY FITTED INSIDE SAID SLEEVE FOR MOVEMENT LONGITUDINALLY THEREOF, SAID SPOOL HAVING TWO LONGITUDINALLY SPACED LANDS JOINTLY ISOLATING A LENGTH OF THE INTERIOR OF THE SLEEVE WHICH COMMUNICATES WITH BOTH SAID PORT MEANS, ONE OF SAID LANDS BEING ARRANGED IN CONTROLLING CO-OPERATION WITH ONE OF SAID PORT MEANS TO VARY THE EFFECTIVE CROSS-SECTIONAL AREA THEREOF ACCORDING TO THE POSITION OF THE SPOOL ALONG THE SLEEVE; AUTOMATIC SPILL BYPASS MEANS MAINTAINING THE PRESSURE DROP IN SAID ONE PORT MEANS CONSTANT, AND AUTOMATIC APERTURE-CONTROL MEANS FOR THE THROTTLE VALVE, SAID APERTURE-CONTROL MEANS INCLUDING A PISTON ELEMENT OPERATIVELY CONNECTED TO ONE OF SAID SLIDE ELEMENTS AND FORMING ONE WALL OF A CONTROL CHAMBER, A SPRING MEANS URGING SAID PISTON ELEMENT INWARDLY OF SAID CHAMBER TO REDUCE SAID EFFECTIVE AREA, A CONNECTION LEADING FROM SAID COMPRESSOR OUTLET VIA A RESTRICTION TO SAID CHAMBER TO URGE SAID PISTON IN A DIRECTION TO INCREASE SAID EFFECTIVE AREA; STOP MEANS ADJUSTABLY LIMITING THE MOVEMENT OF SAID ONE SLIDE ELEMENT AGAINST THE ACTION OF SAID SPRING MEANS; A VENT VALVE SEAT FOR SAID CHAMBER, SAID SEAT BEING MOVABLE WITH SAID PISTON ELEMENT AND FACING THE INTERIOR OF THE CHAMBER, A VENT VALVE-ELEMENT COOPERATING WITH SAID SEAT, AND A VALVE-LOADING SPRING URGING SAID VALVE ELEMENT ON TO ITS SEAT; AND MEANS RESPONSIVE TO THE SPEED OF THE TURBINE AND OPERATIVE TO MOVE THE OTHER SLIDE ELEMENT IN A DIRECTION TO REDUCE THE EFFECTIVE APERTURE OF SAID PORT MEANS WHEN THE TURBINE SPEED EXCEEDS A PREDETERMINED VALUE.