Load control valve for gas turbine compressors

Claim 1

THE COMBINATION COMPRISING A GAS TUBINE COMPRESSOR HAVING A COMPRESSOR, A COMBUSTOR, A TURBINE OPERATIVELY CONNECTED WITH SAID COMPRESSOR, AND A BLEED FLOW OUTPUT CONDUIT LEADING FROM THE COMPRESSOR; A VALVE FORMED FOR DISPOSITION IN THE BLEED FLOW OUTPUT CONDUIT TO CONTROL PNEUMATIC BLEED FLOW THROUGH THE CONDUIT; FIRST MEANS HAVING A REFERENCE PRESSURE CHAMBER WITH A RESTRICTED INLET COMMUNICATING WITH THE BLEED FLOW OUTPUT CONDUIT UPSTREAM OF SAID VALVE, SAID INLET ALSO SERVING AS THE SOLE OUTLET FROM SAID REFERENCE PRESSURE CHAMBER; SECOND MEANS HAVING A COMPRESSOR OUTPUT PRESSURE RECEIVING CHAMBER COMMUNICATING WITH THE BLEED FLOW OUTPUT CONDUIT UPSTREAM OF SAID VALVE, SAID REFERENCE PRESSURE CHAMBER AND SAID COMPRESSOR OUTPUT PRESSURE RECEIVING CHAMBER BOTH COMMUNICATING WITH THE SAME PRESSURE REGION; A MOVABLE WALL BETWEEN SAID CHAMBERS; A SECOND MOVABLE WALL DISPOSED TO OPERATE SAID VALVE; MEANS FOR APPLYING OPPOSING PNEUMATIC FORCES ON SAID SECOND MOVABLE WALL; A SECOND VALVE OPERABLE BY SAID FIRST MOVABLE WALL FOR RELIEVING PNEUMATIC FORCE ACTING IN ONE DIRECTION ON SIAID SECOND WALL; AND A THERMOSTAT COMMUNICATING WITH SAID TURBINE FOR SENSING EXCESSIVE TEMPERATURE THEREOF AND ADAPTED TO RELIEVE PNEUMATIC FORCE ACTING IN ONE DIRECTION ON SAID SECOND WALL.