Abstract: A table (11) can be stopped in a vertical movement with respect to a fixed guide (15) by selectively engaging an engagement and locking element (21) in form of a angled lever having a control arm (33) and a stopping and locking arm (31) with adjustment and stop elements (19) secured on the vertically extending second part (15). Upon movement from a predetermined position, the control arm (33) is engaged in a guide track (51) of the engagement and locking element, permitting unlimited movement in a direction away from an adjustment and stopping shoulder (37) on the abutment and stop element. Upon reverse direction, however, the control arm engages a first can (47) which moves the locking arm (31) against the abutment shoulder (37).

Abstract: To support machinery subject to dynamic vibration in operation, such as sewing machines and the like, on a platform which is movable longitudinally with respect to a post (12), a carriage (14) has at least three or four rollers located thereon of essentially double-conical shape, engaging circular guide surfaces (24) formed on the post. The post (12) preferably is a hollow extruded aluminum rail (12), and the conical portions (46) of the roller form lateral portions having, in cross section, a concave contour which overlaps a projected contour of the guide surfaces of the rails adjacent the terminal ends. The rollers are of elastically deformable material so that, upon engagement with the rail, the terminal end portions will compress and place the guide surfaces under compressive force which is accepted by the rollers, acting in the direction parallel to the shaft axis of the rollers.