Hydroelectric groups

Claim 1

A POWER UNIT COMPRISING A TURBINE HAVING A ROTATABLE SHAFT AND A TURBINE WHEEL MOUNTED ON SAID SHAFT, SAID WHEEL HAVING BLADES OF ADJUSTABLE PITCH, FIRST CONTROL MEANS FOR MODIFYING SAID PITCH, AN ALTERNATOR HAVING A ROTOR CONNECTED WITH SAID TURBINE SHAFT, A WATER UPSTREAM PASSAGEWAY AT THE UPSTREAM SIDE OF SAID TURBINE WHEEL FOR IMPARTING ROTATION TO SAID WHEEL, A DISTRIBUTOR GATING DISPOSED IN SAID UPSTREAM PASSAGEWAY AND HAVING A SERIES OF BLADES, SAID DISTRIBUTOR BLADES HAVING A VARIABLE ORIENTATION FOR VARYING THE OPENING OF SAID DISTRIBUTOR GATING IN VIEW OF ADJUSTING THE WATER FLOW RATE ADMITTED THROUGH SAID PASSAGEWAY TO SAID TURBINE WHEEL, SECOND CONTROL MEANS FOR MODIFYING SAID ORIENTATION, TURBINE GOVERNOR MEANS FOR ACTUATING SAID FIRST AND SECOND CONTROL MEANS IN RESPONSE TO SPEED VARIATIONS OF THE SAID TURBINE WHEEL, CAM MEANS FOR COORDINATING MOTIONS OF TURBINE BLADES AND DISTRIBUTOR BLADES UPON ACTUATION OF SAID GOVERNOR MEANS, OVERRIDING MEANS RESPONSIVE TO A ZERO LOAD CONDITION OF THE ALTERNATOR FOR OVERCOMING NORMAL REGULATION BY SAID GOVERNOR MEANS, FOR IMPARTING TO SAID WHEEL BLADES A PREDETERMINED POSITION WHEN SAID ZERO LOAD CONDITION IS EFFECTIVE, A DOWNSTREAM WATER PASSAGEWAY DISPOSED AT THE DOWNSTREAM SIDE OF SAID TURBINE WHEEL, A GATE IN SAID DOWNSTREAM PASSAGEWAY MOVABLY MOUNTED BETWEEN A FULLY OPEN POSITION AND A PARTIALLY CLOSED POSITION, AND A THIRD CONTROL MEANS FOR MOVING SAID GATE BETWEEN BOTH POSITIONS THEREOF, SAID THIRD CONTROL MEANS BEING RESPONSIVE TO THE LOAD CONDITION OF THE ALTERNATOR SO AS TO MAINTAIN SAID GATE IN THE FULLY OPEN POSITION WHEN THE LOAD OF THE ALTERNATOR IS NORMAL AND TO BRING SAID GATE INTO THE PARTIALLY CLOSED POSITION WHEN THE ALTERNATOR PASSES TO A ZERO LOAD CONDITION.