Abstract: In a railway vehicle with a secondary spring arrangement acting between the chassis and the vehicle body which generates a continuously increasing restoring moment at a relative inclination between the two units until the maximum permissible angle of roll is reached, according to the invention a permissible limitation of the angle of roll is achieved without any adverse effect on the derailing limit and ride comfort on straights in a structurally simple and reliable manner, in that the spring arrangement is comparatively soft and there is a passively acting supplementary spring with a limited range of rotation (rotation play coupling) connected in parallel to the spring arrangement, which operates virtually without restoring moment in a partial range of slight roll angle movements, and at greater deviations of the roll angle within the permissible range, generates a steeply increasing restoring moment which is many times greater than that of the spring arrangement at the maximum permissible angle of body roll

Abstract: A wheel set for rails has a divided axle and two wheels rigidly attached to he respective axle section. The axle sections are interconnected in a force transmitting manner by a clutch for adjusting a differential r.p.m. between the two axle sections. However, the clutch components also permit a relative rotation when the clutch is not energized. The clutch has an inner clutch component and an outer clutch component forming a work gap (7.4) between the clutch components. The work gap extends concentrically to the rotational axis of the shaft and is filled with a magnetizable powder for engaging and disengaging the clutch components which are so mounted to the respective axle section that an axial displacement of the clutch components relative to each other is prevented.