Abstract: A torque transmitting devices has an input shaft having two axially-spaced sets of external splines. Two internally splined members are threadedly interengaged and respectively engage the spline sets on the shaft. The angular positions of the members are adjusted by spacers so that the portion of the shaft between its spline sets is in torsion, the direction of the torsion being such as to increase the threaded engagement between the members.

Abstract: A feed apparatus for displacing a movable part or component relative to a stationary part of component by means of a threaded spindle mounted at one part and a nut member arranged at the other part. Between the nut member and the part associated with the nut member there are provided two rings concentric to the spindle axis, each of said rings being supported to be radially displaceable upon a surface perpendicular to the spindle axis and extending into a substantially ring-shaped groove and hydraulically held in axial direction. Between the grooves and the ring members there is present sufficient play for inclinedly positioning the ring members in the grooves and the aforementioned surfaces are directed in opposite directions from one another.