Fuel control

Claim 1

A FUEL CONTROL FOR A TURBINE TYPE OF POWER PLANT HAVING A COMPRESSOR, A BURNER AND A TURBINE RECEIVING THE DISCHARGE GASES OF THE BURNER FOR DRIVING THE COMPRESSOR, MEANS FOR ESTABLISHING THE ACCELERATION SCHEDULE FOR THE ENGINE SO AS TO PREVENT SURGE AND OVERTEMPERATURE OF THE ENGINE INDEPENDENTLY OF EACH OTHER, SAID MEANS INCLUDING A FIRST VALVE RESPONSIVE TO COMPRESSOR DISCHARGE PRESSURE FOR ESTABLISHING A FIRST HYDRAULIC SIGNAL, A SECOND VALVE HAVING FIRST AND SECOND METERING MEANS LOCATED IN PARALLEL TO EACH OTHER BUT SERIALLY CONNECTED TO SAID FIRST VALVE FOR MODIFYING SAID FIRST HYDRAULIC SIGNAL AND PRODUCING A SECOND AND THIRD HYDRAULIC SIGNAL, SAID SECOND VALVE BEING RESPONSIVE TO COMPRESSOR INLET TEMPERATURE, A THIRD VALVE RESPONSIVE TO CORRECTED COMPRESSOR SPEED HAVING A FIRST METERING MEANS SERIALLY CONNECTED TO SAID FIRST METERING MEANS OF SAID SECOND VALVE AND A SECOND METERING MEANS SERIALLY CONNECTED TO SAID SECOND METERING MEANS OF SAID SECOND VALVE EACH MODIFYING SAID SECOND AND THIRD HYDRAULIC SIGNALS FOR PRODUCING A FOURTH AND FIFTH HYDRAULIC SIGNAL, SAID FIRST AND SECOND METERING MEANS OF SAID THIRD VALVE BEING PARALLELLY DISPOSED RELATIVE TO EACH OTHER, AND A SELECTOR VALVE CONNECTED TO THE FIRST AND SECOND METERING MEANS OF SAID THIRD VALVE FOR SELECTING EITHER THE FOURTH OR FIFTH HYDRAULIC SIGNAL.