Abstract: A security screen (5) comprises: a shutter frame (6) securable in a window opening (1) in a building, with a first side facing the window and a reverse side facing away from the window inwardly of the building; a plurality of parallel blades (7) extending across the shutter frame (6), each said blade having in cross-section a shape which includes a point at each opposed edge of the blade and having a reinforcing axial member (8) extending therethrough and engaged in respective opposing sides of the shutter frame, the blades being linked together and rotatable such that rotation of one blade induces the other blades to rotate simultaneously between a closed position, in which the blades lie substantially parallel to the frame so as to form a continuous shutter, and an open position substantially normal to the closed position; and a sheet of transparent plastic material (10) mounted on the frame and extending across the frame at a predetermined distance from the edges of the blades when in the open position the

Abstract: A security screen (5) comprises: a shutter frame (6) securable in a window opening (1) in a building, with a first side facing the window and a reverse side facing away from the window inwardly of the building; a plurality of parallel blades (7) extending across the shutter frame (6), each said blade having in cross-section a shape which includes a point at each opposed edge of the blade and having a reinforcing axial member (8) extending therethrough and engaged in respective opposing sides of the shutter frame, the blades being linked together and rotatable such that rotation of one blade induces the other blades to rotate simultaneously between a closed position, in which the blades lie substantially parallel to the frame so as to form a continuous shutter, and an open position substantially normal to the closed position; and a sheet of transparent plastic material (10) mounted on the frame and extending across the frame at a predetermined distance from the edges of the blades when in the open position the

Abstract: A combined defence shutter and blind is located in a window opening inwardly of the window. The shutter comprises a shutter frame secured in the window opening, and a plurality of parallel blades extending across the shutter frame, each said blade having in cross-section a shape which includes a point at each opposed edge of the blade and having a reinforcing axial member extending therethrough and engaged in respective opposing sides of the shutter frame. The blades are linked together and rotatable such that rotation of one blade induces the other blades to rotate simultaneously between a closed position, in which the blades lie substantially parallel to the window so as to form a continuous shutter, and an open position substantially normal to the closed position.

Abstract: A combined window blind and security shutter comprising; a support structure (51) securable in a window opening (54); a plurality of rigid blades (50) extending across the support structure, each blade having therein a rigid reinforcing member (56) having at each end thereof a spindle engaged in the support structure in such a manner as to maintain a parallel relationship between the blades whilst permitting rotation of the blade about the spindles; and control means for simultaneously rotating the blades between a closed position, in which the blades lie substantially parallel to the window so as to form together a continuous shutter therefor, and an open position, in which the blades extend substantially normally to the window to permit light and air to pass therebetween.