Abstract: Apparatus for driving a rotatable mantle, such as a mantle of a deflection compensated roll of a paper machine, which is mounted by bearings on a fixed axle, includes a substantially tubular axle fixed to an end of the rotatable mantle. A housing or gear box which constitutes a carrier for at least one drive gear, is mounted by bearings on the tubular axle so that the housing or gear box and the gears associated therewith are fixed to the mantle so as to follow any deflections thereof. Rotation preventing apparatus are provided for fixing the housing or gear box against rotation around the fixed axle yet which permits the housing or gear box to follow any deflections of the mantle. The rotation preventing apparatus includes a toothed coupling member which extends between and is coupled to the housing or gear box and a bearing block in which an end of the fixed axle is mounted.

Abstract: A disc cylinder lock comprising a turnable cylinder enclosing a plurality of locking discs, turnable by the key of the lock, and between adjacent locking discs, intermediate discs. The intermediate discs are radially larger than the locking discs and are provided on one side with an axially extending edge portion defining a cup-formed space on one side of the intermediate disc, the opposite side of the disc being its bottom side. In the lock, the axially extending edge portion contacts the bottom side of an adjacent intermediate disc, so that the last mentioned bottom side forms a cover on the cup-formed space, thereby providing a substantially closed space for each locking disc, located between two adjacent intermediate discs. In this space the locking disc can move without being subject to axial load.