Abstract: A machining device has a machine head capable of displacement along at least three translation axes X, Y, Z for machining an immobile part fixed above the machining head. The machining head is maintained in a constant orientation by at least three articulated connecting rods. Two connecting rods define together with the machining head and with a first Y carriage, on which they are articulated, an deformable articulated parallelogram in the XZ plane. Another connecting rod is articulated on the machining head and on a second Y carriage and the second Y carriage is capable of displacement along Y on a second X carriage capable of displacement along X. The relative movement along X of the Y carriages results in a displacement in the Z direction. Several devices can be positioned in a plurality of tunnels, these tunnels being arranged so as to share several things.

Abstract: A machining device has a machine head capable of displacement along at least three translation axes X, Y, Z for machining an immobile part fixed above the machining head. The machining head is maintained in a constant orientation by at least three articulated connecting rods. Two connecting rods define together with the machining head and with a first Y carriage, on which they are articulated, an deformable articulated parallelogram in the XZ plane. Another connecting rod is articulated on the machining head and on a second Y carriage and the second Y carriage is capable of displacement along Y on a second X carriage capable of displacement along X. The relative movement along X of the Y carriages results in a displacement in the Z direction. Several devices can be positioned in a plurality of tunnels, these tunnels being arranged so as to share several means.

Abstract: A fixed carrier for machine tool parts includes a table frame and a table having a first face That can hold a first part to be machined, the first face being fixed above a machining device and the first part being stationary during the machining process. The table also has a second face for holding steady a second part to be machined.

Abstract: A device enabling the ignition of at least two explosive charges using a single detonator, device wherein it comprises at least a first pyrotechnic booster that is ignited by the detonator, a first booster that firstly ignites a first explosive charge by projecting a casing onto it and which is secondly connected to a second explosive charge by at least one detonation wave transmission booster.

Abstract: A neutralization device for a payload carried by a vector, such as a rocket. This device incorporates at least one explosively-formed charge, where such charge is made integral with the vector by a positioning device ensuring the orientation of its direction of action towards the payload.

Abstract: The invention relates to a wall (2)-protection device (1), notably for a vehicle wall, against attack by a projectile. This device comprises at least one explosive charge (3) able to project at least one metallic block (7) in the direction of the projectile. The device is characterized in that the block or blocks (7) are in the shape of elongated bars, that is which have a maximal length greater than or equal to 10 times their smallest crosswise dimension, the explosive charge (3) being position opposite a longitudinal surface of the bar (7).

Abstract: The invention relates to safety priming device for an explosive charge, notably a shaped charge, comprising a pyrotechnic igniter and at least one igniting relay placed between the igniter and an explosive load. This priming device is characterized in that the igniting relay comprises means enabling the detonation wave produced by the igniter or igniters to be re-centered along the charge axis, said means comprising a confinement block having a bore converging between an external face positioned beside the igniter or igniters and an inner face positioned beside the explosive load, said bore filled with a relay explosive, the confinement block comprising means to prevent the propagation of a shock wave axially through the confinement block between the igniter or igniters and the explosive load.

Abstract: The invention relates to a wall (2)-protection device (1), notably for a vehicle wall, against attack by a projectile.

Abstract: The invention relates to safety priming device for an explosive charge, notably a shaped charge, comprising a pyrotechnic igniter and at least one igniting relay placed between the igniter and an explosive load.

Abstract: The invention relates to a neutralization device for a payload 4 carried by a vector 1, such as a rocket.

Abstract: A vehicle bumper with shock-absorbers, including a rigid support attached to a vehicle onto which a bumper shell is fitted, the shock-absorbers including at least two pyrotechnic actuators linking the rigid support to the vehicle, the actuators being connected for activation by a control system including an impact or deceleration sensor, and each pyrotechnic actuator including at least two gas-generating powder tablets to be primed individually by the control system.

Abstract: An active protection device for a surface, the device having at least one casing enclosing at least one shaped charge having a direction of action substantially parallel to or else inclined with respect to the surface as well as detection device ensuring the triggering of the shaped charge in response to the onset of a projectile. The casing encloses four dihedral shaped charges forming a quadrilateral, or four groupings of shaped charges, and having converging directions of action, the directions of action of the shaped charges can be inclined with respect to the surface and oriented towards the outside of the surface.

Abstract: The charge of the invention comprises a plate placed between the explosive charge and the liner. The diameter of the plate is equal to the internal diameter of the casing of the charge. The material used for the plate must be such that its density is lower than or equal to that of the material used for the liner and must have a volumetric compressibility modulus greater than or equal to 100 GPa, with the thickness of the plate greater than or equal to that of the liner at any point of a central area surrounding the axis of the charge, so as to ensure that upon initiation of the charge the centripetal deformation of the plate will be less than that of the liner.

Abstract: A gun barrel lining made of composite material having refractory fiber reinforcement and a ceramic matrix, the fiber reinforcement comprises a cylindrical inner portion constituted by a three-dimensional fiber texture and a cylindrical outer portion surrounding the inner portion and having the same axis, the outer portion being constituted by a strip wound around the inner portion, and the inner and outer portions being codensified by the ceramic matrix.

Abstract: A structural connection is obtained between elements (21, 22) of the reinforcement texture to be assembled by using at least one blocking means (23). The latter is made of a fibrous texture that is compacted prior to being inserted in a corresponding lodging formed in at least one of the elements of the reinforcement texture in order to conform with the shape of the lodging. The blocking means (23) then locks itself into the lodging by relaxation of its fibrous texture, as a result of a removal of the prior compacting. The blocking means can be in the form of a dowel (23) inserted inside aligned lodgings formed in the elements (21, 22) of the reinforcement texture to be assembled, or may alternatively be part of one of the elements of reinforcement texture to be assembled.

Abstract: The armor for providing ballistic protection comprises an armor plate for stopping projectiles with an auxiliary plate disposed in front thereof at a determined spacing therefrom, the auxiliary plate being constituted by a ceramic plate pierced by a large number of cells distributed in a regular mesh and constituted by blind holes extending perpendicularly to the rear face of the auxiliary plate and opening out into the front face thereof. The effect of the auxiliary plate is to destabilize and to score the projectiles so as to enhance their tendency to shatter on striking the armor plate.

Abstract: The seat comprises panels made of ceramic matrix composite and assembled to one another by shape and by adhesion, either by interposition of an adhesive or else by condensification using the ceramic matrix material. The invention is particularly suitable for armored seats for helicopters.

Abstract: A fibrous preform (10) of the component to be manufactured is conformed in the desired shape with the desired degree of compacting, prior to densification by chemical vapor deposition. The conformation is achieved by linking the preform (10) onto a rigid shaping device (12) by threads (30) that traverse the preform (10) and pass through holes (14) in the shaping device. The linking threads (30) are made of carbon or ceramic. Prior to the linking, a covering layer (16) may be arranged on the face of the preform (10) opposite to the one turned towards the shaping device.

Abstract: The invention relates to the manufacture of a composite material part by shaping a fibrous reinforcement texture and densifying the texture by chemical vapor infiltration of the material constituting the matrix of the composite through the porosity of the texture. Before densification, the texture is separated from an adjacent structure, such as an adjacent surface of a tool (12, 14) inside which the texture is held, or another texture, by means of an inserted layer (10) of fabric produced in a refractory material having a thermal expansion coefficient different from that of the constituent material of the texture.

Abstract: Sintered ceramic elements are associated to at least one composite material layer having a fibrous reinforcement arrangement and a ceramic matrix located behind the sintered ceramic elements.