Hydraulic turbine speed control device

Claim 1

A SPEED CONTROL DEVICE FOR A HYDRAULIC TURBINE HAVING TWO CONTROL MEMBERS FOR DUAL REGULATION OF THE FLOW OF FLUID THERETHROUGH, COMPRISING: A VELOCITY REGULATING MEMBER FOR MEASURING THE SPEED OF THE TURBINE; A FIRST SERVO-MOTOR OPERATIVELY CONNECTED TO THE FIRST OF SAID TWO CONTROL MEMBERS; A SECOND SERVO-MOTOR OPERATIVELY CONNECTED TO THE SECOND OF SAID TWO CONTROL MEMBERS; A FIRST DISTRIBUTOR AND A SECOND DISTRIBUTOR EACH OPERATIVELY CONNECTED TO SAID VELOCITY REGULATING MEMBER; A FIRST SLIDE VALVE IN SAID FIRST DISTRIBUTOR OPERATIVELY CONNECTED TO SAID FIRST SERVO-MOTOR; A SECOND SLIDE VALVE IN SAID SECOND DISTRIBUTOR OPERATIVELY CONNECTED TO SAID SECOND SERVO-MOTOR; AND LINKING MEANS CONNECTED BETWEEN SAID TWO CONTROL MEMBERS, SAID LINKING MEANS INCLUDING A SINGLE CAM OPERATIVELY CONNECTED TO BOTH OF SAID SERVO-MOTORS AND WHOSE POSITION DEPENDS OF THE POSITION OF SAID TWO SERVO-MOTORS, A CAM FOLLOWER IN CONTACT WITH AND FOLLOWING THE PROFILE OF SAID CAM AND TRANSMISSION ELEMENTS CONNECTING SAID CAM FOLLOWER TO SAID FIRST SLIDE VALVE AND SAID SECOND SLIDE VALVE, AND TO SAID VELOCITY REGULATING MEMBER SO THAT WHEN ONE SLIDE VALVE IS DISPLACED IN ONE SENSE THE OTHWE SLIDE VALVE IS DISPLACED IN THE OPPOSITE SENSE WHEREBY SAID CAM AND FOLLOWER CAUSE A CLOSING MOVEMENT OF ONE CONTROL AND AN OPENING MOVEMENT OF THE OTHER CONTROL AND THE LINKING MEANS TRANSMITS A MOVEMENT TO THE TWO SIDES VALVES TO CAUSE SAID SERVO-MOTORS TO ACT IN THE DESIRED DIRECTION ON THE CONTROL MEMBERS TO REGULATED THE FLOW OF FLUID THROUGH THE TURBINE.