Variable stator vane actuating mechanism

In a turbo-machine having a casing and a compressor with at least one row of stator vanes which are angularly adjustable, a mechanism comprising a beam connected at one end to the casing through a universal joint and a pivot offset therefrom, a beam driving member, means mounting said member for movement in a straight line tangent to an imaginary circle, which is coaxial with the compressor casing, an actuator for driving said beam driving member along said straight line, means pivotally connecting said beam to said beam driving member at a position remote from the end of the beam, which is connected to the casing through said universal joint and said pivot, said pivot being offset from said universal joint so as to enable the beam to move in the direction of its own longitudinal length relative to said casing by motion at the pivot and at the universal joint and to enable the beam simultaneously to move by motion at the universal joint when the beam driving member is driven along said straight line by the actuator, a ring, and means connecting the beam through universal joints to said ring, and means connecting said ring to the stator vanes whereby movement of the driving member causes variation of the angles of the stator vanes.