Abstract: A toilet seat (27) is provided with a slide housing (26) comprising nozzles for spraying and/or applying water and/or disinfecting liquid. It comprises at least one wiper for drying the surface of the seat (27). The slide housing (26) is placed over a segment of the seat (27), which then, while being sprayed by the nozzles, is driven in the circumferential direction by at least one electric motor. The entire operation is started up manually by actuating the lever (2) of the flushing water cistern (1), and subsequently is controlled by the control electronics (27) until the cleaning of the seat (27) has been completed. The energy is obtained by a turbine (11), which is mechanically connected to a low-voltage direct-current generator (13), and is driven by the water filling the flushing water cistern (11). The actual flushing water, therefore, flows at the normal kinetic energy into the toilet; the hydraulic resistance of the turbine (11) is not switched on while the flushing water flows into the toilet bowl.

Abstract: This helmet comprises an outer protective shell, an impact-absorbing layer made from a non-elastically compressible material, and a layer of elastically compressible material. A dome is interposed between the said layer and the impact-absorbing layer. The said dome is obtained by hot-drawing a 0.3 to 0.7 mm sheet material, of which the modulus of elasticity is between 1800 and 3500 N/mm.sup.2, the elongation at rupture less than 100% and the ultimate tensile strength between 30 and 100 N/mm.sup.2.

Abstract: A process and plant for hydromechanical recovery of a fluid spread in a thin layer on the surface of a liquid in which predetermined portions of the liquid and superimposed fluid are successively partitioned off, enclosed in a cell of variable cross section and each portion is progressively restricted in volume by reducing the cross-sectional area of the cell to increase the thickness of the layer of contaminant fluid which is then removed.