Abstract: A modular shutter is assembled of prefabricated components and of yard goods or piece goods which are cut to size at the locale of use. The components of the shutter include two upright guide rails for the end portions of a curtain of upwardly and downwardly movable as well as tiltable slats, a horizontal main shaft between the upper end portions of the guide rails, a housing mounted on top of each guide rail and having bearings for the corresponding end portions of the main shaft, a motor or a crank drive for rotating the main shaft clockwise or counterclockwise, and combined lifting and tilting mechanisms in the housings. Such mechanisms have lifting bands which are connected with the end portions of the slats to effect upward or downward movements of the slats in response to rotation of the main shaft in one or the other direction, and tilting bands which change the angular positions of the slats in response to selected rotation of the main shaft.

Abstract: A shutter which can be assembled of prefabricated components and yard goods cut to size at the locale of use has two upright guide rails for the end portions of a curtain of upwardly and downwardly movable as well as tiltable horizontal slats. The shutter further includes a horizontal main shaft between the upper end portions of the guide rails, a housing mounted on top of each guide rail, a motor or a crank drive for rotating the main shaft clockwise or counterclockwise, and combined lifting and tilting mechanisms in the housings. Such mechanisms have lifting bands which are connected with the end portions of the slats to effect upward or downward movements of the slats in response to rotation of the main shaft, and tilting bands which change the angular positions of the slats in response to rotation of the main shaft.

Abstract: A blind or shutter which is or can be assembled of prefabricated components and of yard goods cut to size at the locale of use has two hollow upright guide rails for the end portions of a curtain of interconnected upwardly and downwardly movable as well as tiltable slats, and combined lifting and tilting mechanisms for the slats. Such mechanisms have lifting bands which are disposed in the guide rails and are connected with the end portions of the slats to effect upward or downward movements of the slats in response to rotation of a main shaft in one or the other direction, and tilting bands which are disposed in the guide rails and change the angular positions of the slats in response to rotation of the main shaft. Blocking levers in the guide rails are connected with the ends of the lowermost slat by vertically movable carriages and engage the respective guide rails by gravity to hold the lowermost slat against unauthorized lifting when the lifting bands are slack.