Abstract: In a roller blind with an armor (3) comprising lamellae (4, 4') which may be moved in guiding rails (5) at the side over a deployment length and which can be rolled on or off a take-up roll (2) disposed in a roller-blind housing (1), the free end of a material or coarse-screen blind (6), which is rolled up under the tension of a spring on a roll (7) that in turn is accommodated in a blind housing (8), is fastened to the last lamella (4') at the free end of the armor (3) and the blind housing (8) is disposed below the last lamella (4') of the armor (3). Moreover, the blind housing (8) can be moved over the deployment length (L) of the armor (3), can be locked in position at any height by means of a locking mechanism (10, 11) and, when not in the locked position, is pressed by the tension of a spring in set contact with the last lamella (4').

Abstract: An alarm actuating roller shutter of interconnected armor links is disposed for movement within a pair of opposed guide rails each of which has an outer cross sectional chamber partitioned off from a guide cross sectional chamber. The alarm is actuated by a magnetic switch consisting of a magnetic actuator portion on at least one of the armor links and a stationary switch portion within the outer cross sectional chamber. The actuator and stationary switch portion are arranged so that the actuator portion will actuate the stationary switch portion when the roller shutter is in the closed position.