Abstract: The height adjustment range of a levelling shoe with an annular support surface is increased by a device that includes a spacer ring having a first face and a second face. The first face has, at a radially inward location, an axially protruding annular projection. The second face has, at a radially inward location, a recess that is substantially complementary to the annular projection. There is also provided a slot that extends over the entire axial length of the spacer ring and projection and extends from an outside peripheral surface of the spacer ring to an inside peripheral surface of the projection.

Abstract: A wedge operated levelling shoe is disclosed for supporting machine tools or the like. A top and bottom plate are separated by an adjustable distance determined by the position of an intermediate wedge. The parts are maintained aligned by slidable keys and resilient spring elements which provide a compact unit with higher natural resonant frequency than the individual parts.

Abstract: A leveling element comprising a post, a support plate containing an opening defining a seat for receiving an end of the post, bearing means at said end of the post structured to be received in said opening in engagement with the seat for angular movement of the support plate relative to the longitudinal axis of the post and yieldable retaining means incorporated in the opening yieldably displaceable to permit the bearing means at the end of the post to be moved into the opening into engagement with the seat and to retain the support plate at said end of the post.

Abstract: Upon a spider with rigid arms (4) and thereon adjoining mounting plates (1) are placed spring bands (81,82,83). These are supported on battens (12) on the mounting plates (1) and connected via screw bolts (20). By means of the screw bolts (20) the spring tension of the leaf spring strips (71,72,73) can be varied. Upon this triangle of strips rests another spider, containing rigid arms (5) and mounting plates (2). The contact site of the leaf spring sections (71,72,73) on the battens (12) is linear and in the same way there exists a linear resting of the arms (5) on the underlying strips. The mounting plates (2) of the upper spider contain again battens (12) and clamp bolts (20) forming a linear support. The superposed spiders are guided against one another through sleeves (9), guide rod (10) and key (11). Because of the fact that there exist leaf spring sections, the mounting height of the vibration dampers is very small.