Abstract: The invention relates to a louver blind having louvers (1) that can be pivoted about a vertical axis, displaceably held at both ends thereof by louver holders (2) extending beyond the louver width between an upper and a lower guide track (3). The louver holders (2) are hereby connected to each other by carriages (4) displaceable in the guide tracks (3) and aligned in parallel to each other, and can be pivoted by synchronously driven drive device disposed in the carriages (4). In order to make the installation of the louver blind—or optionally the removal thereof—easier, according to the invention, decoupleable permanent magnets (16, 18) are provided for connecting between the louver mounts (2) and the carriages (4). Said arrangement has the further advantage that the connections can automatically release when critical tension or rotational forces are exceeded, so that damage can be prevented in the connecting parts.

Abstract: In a drive device which is especially suitable for moving and turning the slats of a blind in a runner and in which the rotational movement of a drive wheel (2) can be alternately transmitted to a turning drive means effecting the rotational movement of the slats and to a transport drive means effecting the movement of the salts in the runner, the drive wheel (2) is driven by electric motor and, in addition, the shift of the change gear from its one shifting position into the other shifting position is effected by an electrical signal. For this purpose, a toothed sleeve (3) driving the transport drive means and a toothed sleeve (4) driving the turning drive means is alternately coupled to a drive tube (1), which can be driven via the drive wheel (2), in dependence on the relative rotational position of a reversing shaft (10) in the drive tube (1) via locking members (7, 8) arranged on its periphery.

Abstract: A device for shutting off the rotary movement of a shaft driven by an electric motor via a reducing gear, after an adjustably predetermined number of revolutions, particularly a shaft for activating a window covering such as a blind with individual slats, with several ring-shaped switching disks arranged next to one another in their axial direction, each having a notch on its outside, which disks can be rotated about their common axis when the shaft is driven, with a rocker switch pressed against the switching disks by a spring and resting against the outside of the disks, which rocker shuts off the drive of the shaft when it simultaneously drops into the notches of all the switching disks, and on the inside of which disks inside gear teeth are provided, with the number of teeth being different from the number of teeth of the other switching disks in each instance, where the switching disks can be driven on their inside gear teeth by means of a gear wheel driven by the shaft, where the gear wheel is arranged

Abstract: A drive mechanism, particularly for moving and turning the slats of a blind, is disclosed. The drive mechanism comprises a suitable drive element for driving one or the other of a first and a second shaft. Connected between the drive element and the first shaft there is connected a freewheel which is contained between two end positions and is in effect during the rotation of the second shaft in both directions. A clutch is connected between the drive element and the second shaft to automatically decouple the second shaft from the drive element on completion of the freewheel action.