Gas turbine control method and system

Claim 1

A CONTROL SYSTEM FOR A GAS TURBINE AND A VARIABLE PITCH PROPELLER DRIVEN THEREBY, COMPRISING, IN COMBINATION, MEANS FOR ADJUSTING THE QUANTITY OF FUEL DELIVERED TO THE TURBINE IN ORDER TO MAINTAIN CONSTANT THE WORKING ROTATION SPEED THEREOF, MEANS FOR INDEPENDENTLY CONTROLLING THE BLADE PITCH OF THE PROPELLER BETWEEN REVERSE AND FEATHERING, MEANS FOR CONTINUOUSLY COMPARING THE ACTUAL TURBINE TEMPERATURE WITH THE MAXIMUM PERMISSIBLE TEMPERATURE FOR SAID TURBINE, MEANS FOR REDUCING THE BLADE PITCH AS SOON AND AS LONG AS THE ACTUAL TURBINE TEMPERATURE TENDS TO EXCEED SAID MAXIMUM PERMISSIBLE TEMPERATURE, MEANS CONNECTED TO SAID PITCH CONTROLLING MEANS AND CONTROLLED BY SAID TEMPERATURE COMPARING MEANS FOR AUTOMATICALLY INCREASING THE BLADE PITCH UNTIL MAXIMUM LOADING IS ATTAINED FOR THE TURBINE AS LONG AS THE ACTUAL TURBINE TEMPERATURE IS LESS THAN SAID MAXIMUM PERMISSIBLE TEMPERATURE, MEANS INTERCONNECTING SAID TEMPERATURE COMPARING MEANS AND SAID PITCH AUTOMATICALLY INCREASING MEANS FOR RENDERING SAID LAST MEANS INEFFECTIVE AS SOON AS THE ACTUAL TURBINE TEMPERATURE IS EQUAL TO SAID MAXIMUM PERMISSIBLE TEMPERATURE AND FOR STARTING AGAIN SAID PITCH AUTOMATIC INCREASING MEANS AS SOON AS THE ACTUAL TURBINE TEMPERATURE DECREASES BELOW SAID MAXIMUM PERMISSIBLE TEMPERATURE, MEANS FOR AUTOMATICALLY RENDERING EFFECTIVE SAID PITCH REDUCING MEANS AS SOON AS THE ACTUAL TURBINE TEMPERATURE OVERREACHES SAID MAXIMUM PERMISSIBLE TEMPERATURE, AND MEANS FOR RENDERING INEFFECTIVE SAID LAST MEANS AND THE PITCH REDUCING AND AUTOMATIC INCREASING MEANS AS SON AS THE DECREASING PITCH ATTAINS A PREDETERMINED POSITIVE VALUE.