Abstract: An effective reduction of vibration overshoots is intended to be effected in a drive shaft, which is configured as a hollow shaft (8), with simple means at the particular vibration maximum (vibration antinode). A vibration absorber (2) is arranged within the hollow shaft (8) and includes a damping mass (absorber mass) (4) and an elastic coupling element (6). The absorber mass (4) is operatively connected to the inner wall of the hollow drive shaft (8) via the elastic coupling (6). The absorber mass is configured to be rotationally symmetrical and axially symmetrical and has, at its center, a constriction (12) for accommodating the elastic coupling element (6). For use as a drive shaft (hollow shaft) (8), which is built in in the vehicle transverse direction, and for use as a drive shaft (8) (cardanic shaft configured as hollow shaft) which is built in in the vehicle longitudinal direction.

Abstract: A vibration damper comprises an attachment member and a damping mass connected by an elastomer spring with a plurality of elastic coupling elements. The coupling elements are inclined relative to the direction of the spacing between the damping mass and the attachment member. The inclination angle of the coupling elements is adjusted so that the natural vibrational frequency of the vibration damper in the spacing direction can be tuned largely independently from that in a direction perpendicular to the spacing direction.

Abstract: A vibration damper comprises an attachment member and a damping mass connected by an elastomer spring with a plurality of elastic coupling elements. The coupling elements are inclined relative to the direction of the spacing between the damping mass and the attachment member. The inclination angle of the coupling elements is adjusted so that the natural vibrational frequency of the vibration damper in the spacing direction can be tuned largely independently from that in a direction perpendicular to the spacing direction.

Abstract: A mixture of mercury and red phosphorus obtained by flowing an aqueous solution having at least one mercury salt dissolved in it through a layer of granular red phosphorus in a column arranged in upright position and provided, close to its lower end, with means supporting the layer of red phosphorus, is separated into its constituents. To this end, fluidizing matter is forced from below under pressure over a period of 5-30 minutes through the said means and layer of red phosphorus thereon, the mercury/red phosphorus-mixture covered with solution and provided with flow deflecting paths becoming lifted up; mercury dropping from the mixture so lifted is collected over a period of 5-30 minutes on the supporting means; fluidizing matter is forced from above under pressure over a period of 1-20 seconds into contact with the said mixture; and the mercury running down from the supporting means is collected. Apparatus for carrying out the process.