Abstract: It comprises a cylindrical body 1 which is intended to be fixed on an explosive projectile. A detonator 12 comprising a casing 13 whose rearward portion serves as armor plating 13' is mounted slidably in a casing 11 which is fixed coaxially in the cylindrical body, from an inactive position within the casing 11 to an active position within a case member 18 which extends the casing 11 rearwardly and which is disposed in the operating position within the explosive charge 4 of the projectile. In the inactive position, the detonator is retained by balls 19 which are partially engaged in a groove 16 provided in a cover 15 which extends the detonator in a forward direction, and emerge from openings 20 provided in the wall of the casing 11. The balls are held in position by the bore of an arming inertia weight member 21 which is mounted slidably outside of the casing 11 and which is subjected to a resilient action and to retardation of its movement in a forward direction.

Abstract: The invention relates to an aiming instrument for a small arms weapon comprising an arrangement for directional aiming and an arrangement for vertical aiming, wherein the directional and vertical arrangements are integral and a fixing device is provided to connect them detachably to the barrel of the weapon; the directional aiming arrangement includes an alidade; and the vertical aiming arrangement comprises at least one partially transparent chamber containing at least one movable mass which is displaced opposite a scale.

Abstract: The invention relates to a bottom fuse for an explosive projectile for example a rifle grenade comprising a hollow revolution body the rear end of which is provided either with a primer or with a percussion point and inside of which a detonator is slidably mounted. The detonator is movable from an inactive stocking position completely inside said body to an active working position partly outside of said body, and means are provided for locking the detonator in stocking position. A sleeve is further slidably mounted outside of said body and is subjected to a resilient action and to the action of delay means of its forward motion under the effect of said resilient action. Finally a percussion point carrier or a primer carrier is slidably mounted outside of the rear end of said hollow revolution body and is subjected to a resilient action intended to maintain the percussion point away from the primer.

Abstract: The invention relates to a fuze plug for hand grenade comprising a rotative drum having two axial bores having respectively a detonator and its propulsive charge and a pyrotechnic timer. In active position of the drum the detonator is aligned with a chamber provided in the explosive charge of the grenade and the pyrotechnic timer is operatively connected to a primer. In safety position of the drum physical barriers are interposed between the detonator and the explosive charge of the grenade as well as between the pyrotechnic timer and the primer.

Abstract: The invention relates to an explosive fragmentation type projectile stabilized by gyration, carrying a tubular case and provided with an instantaneous percussion head fuse and a tracer.The base of the projectile comprises a thick heavy and projecting central part, having at its rear end means of attaching a tracer, and an annular part of connecting the central part of the base to the cylindrical wall of the projectile having a thickness which diminishes in the direction of the central part.This annular part of the base extends towards the rear of the projectile, and comprises at least one zone of diminished strength.

Abstract: The invention relates to an explosive projectile comprising an explosive charge and a device for firing a detonator outside of the charge, characterized in that the explosive charge comprises a recess, in that the projectile comprises a device for priming this explosive charge comprising an explosive relay housed at all times at least partially in the recess in the explosive charge and mounted to slide therein between a retracted safety position in the explosive charge for which the relay is kept remote from the detonator and a forward armed position in which this relay is situated in the immediate proximity of the detonator or is in contact therewith, while being partially engaged in the explosive mass, and in that it also comprises a device for locking the explosive relay in its retracted safety position.

Abstract: A portable fire-arm having a recoil brake braking the recoil stroke of the barrel relative to the breech-carrier when a shot is fired, which includes a manually operated mechanical connection device between the barrel and the recoil brake the whole being so arranged that the barrel can be manually retracted into the breech-carrier in the retracted carrying position, the brake being rendered inoperative. A device is provided for locking the barrel relative to the breech-carrier in that retracted position.

Abstract: The invention relates to a ball-and-socket joint comprising an upper jaw and a lower jaw, one arranged on one side of a median plane of a ball, and the other disposed on the other side of said plane, and a means for clamping these jaws to lock the joint in a required position, characterized in that it comprises: a part-spherical cup disposed between the upper jaw and the ball; a first guide means limiting displacement of this cup relatively to the upper jaw in a first central plane of symmetry of the ball; and a second guide means limiting displacement of this cup relatively ot the ball in a second central plane of symmetry of the ball, and in that this first and second plane of symmetry are at right-angles to each other.

Abstract: The invention relates to a support which comprises a spindle at the ends of its usable length two resting bosses, concentric with its axis in neutral position, the one being fixed and the other being displaceable by a varying excentricity. Thereby it is possible to displace the axis of the spindle within a cone the summit angle of which is given by the constructional characteristics of said spindle.