Abstract: A projectile comprises a pyrotechnic charge and a mobile member inside the projectile which rotates between a safe position and an armed position. At least part of a pyrotechnic delay device is accommodated in a passage in this mobile member. The pyrotechnic charge is initiated via this pyrotechnic delay device. The passage is oriented so as to isolate functionally the pyrotechic delay device from the pyrotechnic charge when the mobile member is in the safe position. It functionally couples the pyrotechnic delay device to the pyrotechnic charge when the mobile member is in the armed position. The projectile further comprises an arrangement on the mobile member and on the projectile to guide relative rotation between them about an axis fixed relative to the mobile member and relative to the projectile. A mechanical arming device retains the mobile member in the safe position and against rotation about the aforementioned axis relative to the projectile at least until the projectile is fired.

Abstract: A projectile has a central part relative to the longitudinal direction of the projectile which is the direction in which it is fired. The projectile contains a pyrotechnic charge in the form of two identical operational charges. These are offset longitudinally relative to the central part of the projectile and symmetrically disposed one on each side of this central part. The projectile further contains a device for initiating the pyrotechnic charge subject to a time-delay. This device is accommodated in the central part of the projectile and adapted to initiate the two operational charges simultaneously.

Abstract: A cartridge comprises a longitudinal tube having a transverse open end. A projectile is accommodated in and can slide longitudinally inside the tube. The projectile is ejected from the tube through the open end by sliding longitudinally relative to the tube. There is a pyrotechnic charge in the projectile. A device for securing delayed initiation of this charge comprises a fuse, a percussion member in the projectile movable between a retracted position in which it is removed from the fuse and a striking position in which it strikes the fuse, a device adapted to hold the percussion member temporarily in its retracted position and complementary mechanical devices on part of the projectile and part of the tube facing the path followed by this part of the projectile as it is ejected.