Abstract: A spacer for lamella carriers of vertical lamella blinds comprises an oblong, strip-shaped section, an end connector element for positive engagement with the lamella carrier, as well as a detent arranged at its free end that can be guided into seating with the neighboring lamella carrier. For simplification of assembly and in order to avoid a spreading of the strip-shaped sections, the connector element of the spacer carriers two channels at its side facing away from the lamella carrier, these two channels being directed toward one another and their spacing and width essentially corresponding to the dimensions of the strip-shaped section of the spacer, so that the strip-shaped section of the spacer of the following lamella carrier is capable of sliding in these channels during extension of retraction.

Abstract: A worm drive for setting the angular position of vertical slat blinds comprising a vertical axis or shaft arranged inside a slat carrier housing and carrying a pinion torsionally connected thereto and having its end side joined to a slat. A worm rotatable by a drive shaft is in drive engagement with the pinion. This worm drive is characterized by a worm having an axial center opening that, given significantly simplified assembly and reduced structural depth of the slat carrier housing, is held by a snap-on sleeve on a projection of the slat carrier housing shaped like a connecting piece. The worm is provided with an inside dentation that is in engagement with cams arranged at the outside circumference of the snap-on sleeve and thus forms a friction clutch that allows a hamrless overturning of the worm as a consequence of the limited transmission of torque.