Abstract: In adjusting turbine vanes to control the nozzle area, the unison ring actuates a lever that has one end fixed to the vane casing ring and the vane actuating arm is connected to the lever at a point between the ends to reduce actuating forces required by the unison ring and to permit close tolerance control on the vane angle position.

Abstract: A turbine having a radial inlet to the turbine wheel is provided with variable nozzle vanes to control the inlet flow to the turbine. The vanes are controlled by lever-actuated gearing to provide a positive coupling of input to the vanes.

Abstract: A hydraulic machine, wherein means for rotating guide apparatus vanes comprises a control ring and at least two actuating motors. Each actuating motor is movably connected to the control ring. The control ring is operatively connected to each vane of the guide apparatus. The actuating motor is fixed to a support member which is rigidly fixed to embedded parts of the hydraulic machine and cast in concrete.

Abstract: A mechanical joint for connecting each of the actuating levers on a row of variable position engine vanes to a common synchronizing ring including a flattened cylindrical slider fitting in a cylindrical recess in the actuating lever and having a stepped hole to receive a substantially radially extending pin in the synchronizing ring.

Abstract: A stator of a hydraulic machine with the end-face sealing of vanes comprises an upper rim, a lower rim and rotatable stator vanes mounted with their journals in said rims in such a manner as to form an annular row. The upper and lower rims are provided with holes for receiving the vane journals and with rectangular recesses located between the adjacent holes receiving the vane journals in the zone of projection of the section of the vanes on said rims when the vanes are in the closed position. In order to eliminate leakages of liquid between the rims and the end faces of the vanes, a seal is disposed in each recess along the entire length thereof. The seal comprises a gasket inserted in the recess with a space remaining between the base thereof and the bottom of the recess, the gasket having at least one through passage for filling the space with liquid flowing to the stator.