Abstract: A switch (1), in particular a foot-operated switch, with a housing (2), in which a switching device (4) is arranged, wherein a leadthrough with a bearing (6) is provided on opposite sides of the housing (2), and a pivotable pedal (3) can be fixed to the bearings (6). The pedal (3) can be positioned removably on the bearings (6) and, in the state in which it is positioned on the bearings (6), can be secured on the bearings (6) in each case via at least one connecting element (12).

Abstract: A switch (1), in particular a foot-operated switch, with a housing (2), in which a switching device (4) is arranged, wherein a leadthrough with a bearing (6) is provided on opposite sides of the housing (2), and a pivotable pedal (3) can be fixed to the bearings (6). The pedal (3) can be positioned removably on the bearings (6) and, in the state in which it is positioned on the bearings (6), can be secured on the bearings (6) in each case via at least one connecting element (12).

Abstract: An adjustment device for adjusting an article of furniture, includes a drive unit having at least one direct current positioning motor connected to a mains power source; a control unit with at least one switching device for actuating the positioning motor(s); and a mains disconnect relay connected to a mains power plug assembly or a supply line connecting the voltage source to the mains. An additional switching unit which is separate from the switching device(s) for actuating the positioning motor(s) is provided for actuating the mains disconnect relay.

Abstract: An electromotive drive unit for an adjustable structure, for example a tabletop of a piece of furniture, includes at least one drive motor for adjusting a position of a structure. The drive motor includes a measuring unit for direct or indirect measurement of drive-specific parameters. A control unit is provided for controlling operation of the drive motor, and is acted upon by an evaluation unit for intervention in the adjustment process for the structure, when an actual value of the drive-specific parameters deviates from a desired value.

Abstract: Disclosed is a progressive ophthamic lens having positive distance portion power, in which at least one surface is designed as a progressive area, and a distance portion (FT) intended for distant vision having practically constant distance portion power and a near portion (NT) intended for hear vision having practically constant near portion power including a progression zone (PZ), in which the surface refractive power increases from the surface refractive power (D.sub.F) present at the distant reference point (B.sub.F) along a curved of plane main meridian (HM) to the surface refractive power (D.sub.N) present at a near reference point (B.sub.N).