Apparatus for controlling the afterburner load of a jet engine according to the jet pipe aperture

Claim 1

IN A TURBOJET HAVING: AN AFTERBURNER, A VARIABLE-AREA NOZZLE PROVIDED WITH MOVABLE ELEMENTS FOR VARYING THE AREA THEREOF BETWEEN A MAXIMUM OPENING POSITION AND A MINIMUM OPENING POSITION, A NOZZLE CONTROL SYSTEM FOR ADJUSTING THE POSITION OF SAID MOVABLE ELEMENTS, AND AN AFTERBURNER FUEL SUPPLY SYSTEM WHICH INCLUDES AN AFTERBURNER CONTROL COMPRISING AN AFTERBURNER FUEL FLOW METER, A SOURCE OF FLUID AT A PRESSURE RESPONSIVE TO AN OPERATIVE PARAMETER OF THE TURBOJET, AN ENCLOSURE, A CONNECTION BETWEEN SAID SOURCE AND SAID ENCLOSURE, A RESTRICTION IN SAID CONNECTION, A CONSTANT RESTRICTED LEAK PASSAGE COMMUNICATING WITH SAID ENCLOSURE, AND OPERATING MEANS EXTENDING BETWEEN SAID ENCLOSURE AND SAID METER FOR ACTUATING SAID METER BY SAID PRESSURE FLUID, THE ARRANGEMENT BEING SUCH THAT THE FUEL FLOW VARIES WITH THE FLUID PRESSURE IN SAID ENCLOSURE; A CORRECTING DEVICE FOR LIMITING SAID AFTERBURNER FUEL FLOW WHEN SAID NOZZLE IS IN SAID MAXIMUM OPENING POSITION, COMPRISING A FURTHER RESTRICTED LEAK PASSAGE COMMUNICATING WITH SAID ENCLOSURE, OBTURATING MEANS FOR CLOSING SAID FURTHER RESTRICTED LEAK PASSAGE, CONTROL MEANS FOR ACTUATING SAID OBTURATING MEANS SO AS TO OPEN SAID FURTHER RESTRICTED LEAK PASSAGE, AND MEANS UNDER THE CONTROL OF SAID MOVABLE ELEMENTS OF SAID NOZZLE FOR ACTUATING SAID CONTROL MEANS BY SAID MOVABLE ELEMENTS IN A POSITION NEAR TO SAID MAXIMUM OPENING POSITION.