Abstract: An arrangement for liquid supply into the rotor of an electric machine comprises a bush mountable on the rotor shaft and having a duct for passing the liquid therethrough and projecting circular partitions, and a pressure, drain, and a collecting circular chambers embracing the bush. These chambers are formed by interconnected stationary circular partitions mounted with a clearance relative to the bush circular partitions. Each of the clearances of the pressure and of the collecting circular chambers is sealed by a sealing plate made of resilient rubberlike material, mounted in these chambers and fixed on the stationary circular partition or on the bush partition, and contacting with its operating surface with another one of these partitions.

Abstract: A rotor, for a synchronous salient-pole electrical machine, having a rim built up in annular layers consisting of segments provided with recesses forming slots on the rim circumference, in which like poles are mounted and which form a plurality of groups distributed in series over the rim circumference, the distances between the adjacent slots in all the groups being the same and different than equal distances between the adjacent slots of different groups. In some of the segments the adjacent recesses are spaced from each other by a distance equal to the distance between the slots within a group.

Abstract: A hydrogenerator comprises a rotor with poles and a stator formed as a ring consisting of separate sectors secured to each other, the angle of every stator sector being of such a value that the product of that value and the number of rotor pole pairs is a multiple of .pi..