Abstract: The invention relates to a drive for closures of apertures, more particularly sectional gates. The sectional gate is made up of slats 1a-1c directly hinged to one another and guided in vertical and horizontal rails 3, 5 on both longitudinal edges. In the deflecting zone between the vertical portion and the horizontal portion of the aperture closure, associated with each edge of the aperture closure is a sprocket wheel 6 engaging with a roller chain. The rollers 21-24 of the roller chain are disposed on pivot pins 17-20 borne by locking members 10-12. The locking members 10-12 are inserted in the ends of every second hollow slat 1a, 1b, 1c. The pivot pins 17-20 are so arranged as to be in alignment with the hinge points 13-15 of the slats 1a-1e hinged to one another.

Abstract: A roller blind for closing openings in buildings, such as windows, doors, or the like, which blind is formed from a plurality of laminated strips which are attached one to the other and whose ends are guided in guide rails, and has an insertable bolt for locking the roller blind and which is provided in the lowermost laminated strip. This lowermost strip is formed as an end bar housing said bolt which can penetrate into an opening in one of the guide rails in the closed (locked) position under the action of a spring. For unlocking purposes, a cord which is secured to the bolt, is guided upwards through endpieces of the laminated strips and secured so that, upon winding the laminated strips around the winding shaft, the bolt is withdrawn from the opening in the guide rail against the action of the spring.