EP2077431A2 - Micro-machined or micro-engraved weaponry and security device - Google Patents

Micro-machined or micro-engraved weaponry and security device Download PDF

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Publication number
EP2077431A2
EP2077431A2 EP09290003A EP09290003A EP2077431A2 EP 2077431 A2 EP2077431 A2 EP 2077431A2 EP 09290003 A EP09290003 A EP 09290003A EP 09290003 A EP09290003 A EP 09290003A EP 2077431 A2 EP2077431 A2 EP 2077431A2
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EP
European Patent Office
Prior art keywords
flap
security
latch
substrate
centrifugal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09290003A
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German (de)
French (fr)
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EP2077431A3 (en
EP2077431B1 (en
Inventor
Renaud Lafont
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nexter Munitions SA
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Nexter Munitions SA
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Publication date
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Priority to PL09290003T priority Critical patent/PL2077431T3/en
Publication of EP2077431A2 publication Critical patent/EP2077431A2/en
Publication of EP2077431A3 publication Critical patent/EP2077431A3/en
Application granted granted Critical
Publication of EP2077431B1 publication Critical patent/EP2077431B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/005—Combination-type safety mechanisms, i.e. two or more safeties are moved in a predetermined sequence to each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/24—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected by inertia means
    • F42C15/26—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected by inertia means using centrifugal force
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/34—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected by a blocking-member in the pyrotechnic or explosive train between primer and main charge

Definitions

  • the technical field of the invention is that of security and arming devices for a pyrotechnic chain of a projectile and in particular micro-machined security and arming devices.
  • DSAs Security devices
  • They generally comprise a screen closing a transmission channel which connects a detonator and a pyrotechnic charge.
  • the screen is thus interposed on the transmission of the detonation wave between the detonator and the load and it prevents the operation of the latter.
  • the patent US 6964231 describes such a micro-machined safety device comprising a flap carrying a pyrotechnic charge and sliding by the action of the centrifugal force. This shutter itself is immobilized by a lock that is erased by the acceleration of firing of the projectile.
  • the rocking lock is operated by a pyrotechnic composition generating gas whose ignition is controlled by an electronic means.
  • Such a safety device and armament allows to use for arming two independent environmental conditions: longitudinal firing acceleration and centrifugal acceleration. This double security allows this device to comply with the highest standards of projectile arming safety (STANAG 4187).
  • the second latch (rocking latch) requires the implementation of a pyrotechnic composition and means of initiation thereof.
  • An electronics must therefore be provided to control the operation of this MEMS which is therefore unsuitable for use in ammunition of medium caliber (caliber less than 40 mm) for which the available volume is limited.
  • the object of the invention is to provide a micro-machined safety and arming device, of simple structure and satisfying the most demanding safety conditions, in particular requiring the presence of two independent environmental conditions for moving into an armed position.
  • the device according to the invention implements a 100% mechanical armament while ensuring a reliable pyrotechnic chain interruption.
  • the subject of the invention is a micro-machined or micro-engraved security and arming device for a pyrotechnic chain of a projectile which is animated when firing an axial rotational movement, a device comprising a substrate on which is disposed a pyrotechnic chain interruption flap which is movable in translation on the substrate, in which device the chain interruption flap is held immobilized by at least two bolts, a first latch (or axial acceleration latch) which is released as a result of the application of the acceleration communicated to the projectile during firing and a second latch, characterized in that the second latch is a centrifugal latch which is released as a result of the rotation of the projectile.
  • the centrifugal latch comprises at least one interlocking locking finger of the substrate, which finger is held in an impression of the flap when it is in its locking position, the holding being ensured by a micromachined centrifugal flyweight. which is itself slidably mounted in a flap housing.
  • the centrifugal weight will be slidably mounted against the action of a first spring means.
  • Braking means may be provided to slow the movement of the weight.
  • the flap itself can advantageously slide by the action of the centrifugal force and against the action of a second spring means.
  • the locking finger may be secured to the substrate by means of a flexible tongue.
  • the braking means may comprise lamellae secured to at least one of the flexible tongues, lamellae rubbing against a lateral surface of the weight.
  • the substrate will advantageously comprise an orifice on either side of the flap, the axis of these orifices, and therefore the direction of action of the pyrotechnic chain, being substantially parallel to the plane of the flap.
  • the figure 1 shows a projectile 1 of medium caliber (caliber less than 50 mm), which comprises a body 2 enclosing an explosive charge 3.
  • the body 2 receives at its front part a rocket 4 which is screwed into a tapping of the body 2.
  • the rocket 4 comprises a housing 8 which contains a firing charge 5.
  • the firing load 5 is intended to be initiated by a pyrotechnic chain comprising a detonator 6 and a relay 7 (alternatively this relay 7 could be omitted and the detonator 6 would then initiate directly the priming charge 5).
  • the detonator 6 is here a percussion detonator which is initiated by a striker 9 slidably mounted in a nose 10 secured to the casing 8 of the rocket 4. During the impact of the projectile 1 on a target, the striker 9 is projected onto the detonator 6. The striker is held in place during the storage and firing phases by a shear washer 11.
  • the rocket 4 also contains a security and arming device 12 which makes it possible to interrupt the pyrotechnic chain during the storage and firing phases of the projectile 1.
  • this safety and arming device is made in the form of a micro-machined or micro-engraved device (MEMS). It thus comprises a substrate 13 on which is mounted a sliding shutter 14 which ensures the interruption of the pyrotechnic chain.
  • MEMS micro-machined or micro-engraved device
  • the substrate 13 has two orifices 15a and 15b disposed on either side of the flap 14.
  • the detonator 6 must have the minimum size to ensure operation and it will be coupled to a suitable pyrotechnic relay 7 (or 5). It has been verified that by using a detonator comprising an output stage of 10 milligrams of Hexogen coupled to a very insensitive relay, for example in HNS (hexanotrostilbene), it was possible to make orifices 15a, 15b ( or transmission channels) of less than 1 mm 2 section (channel diameter of the order of mm) while guaranteeing the desired initiation transmission.
  • HNS hexanotrostilbene
  • the projectile 1 is also provided with a belt 2a which takes the scratches of the barrel of the weapon (not shown) and which communicates to the projectile 1 a rotational movement about its axis during firing.
  • the figure 2 shows in more detail the internal structure of the safety device 12 according to the invention.
  • the device therefore comprises a substrate 13 on which is disposed a pyrotechnic chain interruption flap 14 which is movable in translation on the substrate.
  • the flap 14 is made by micro-machining or micro-etching according to MEMS production techniques which are well known to those skilled in the art.
  • orifices 15a and 15b which are disposed on either side of the flap 14 and the axis 16 of these orifices (thus the direction of action of the pyrotechnic chain).
  • the dimension L of the shutter 14 ensures the interruption of the pyrotechnic chain in the safety position of the device 12.
  • the chain interruption flap 14 is held immobilized by two bolts.
  • a first latch 17 (or axial acceleration latch) and a second latch which is a centrifugal latch released as a result of the rotation of the projectile 1.
  • the device according to the invention directly uses the centrifugal inertia to unlock the flap 14 while maintaining the safety of the beginning of trajectory (no arming before a certain distance traveled out of the tube).
  • the first latch 17 cooperates with a notch 18a carried by a rod 18 secured to the flap 14.
  • This latch 17 is held engaged in the rod 18 by a spring means 19 interposed between the latch 17 and the substrate 13.
  • the latch 17 also carries a bar 20 carrying at least one indentation. This bar 20 is intended to cooperate with a complementary cavity 21 carried by the substrate to ensure immobilization of the first latch 17 in its unlocked position.
  • the spring means 19 is of course also made according to micro-machining or micro-etching technologies (MEMS technologies).
  • MEMS technologies micro-machining or micro-etching technologies
  • the centrifugal latch comprises at least one locking pin 22 which is integral with the substrate 13.
  • the device here comprises two fingers 22 made in the form of cylindrical micro-machined or micro-etched discs and made integral with the substrate 13 via flexible tongues 23, also micro-machined or micro-engraved.
  • Each finger 22 is housed in a recess 24 of complementary shape and which is arranged in a housing 25 of the flap 14.
  • the fingers 22 are held in the cavities 24 by a micromachined or micro-engraved centrifugal feeder 26 which is itself slidably mounted with respect to the substrate 13 and in the housing 25 of the shutter 14.
  • the weight 26 is held in its locking position ( figure 2 ) by a first spring means 27 (also micro-machined or micro-engraved).
  • first spring means 27 also micro-machined or micro-engraved.
  • the mechanical characteristics of the first spring means 27 are chosen so that the weight 26 moves only as a result of the forces related to the centrifugal acceleration resulting from the rotation of the projectile 1 during firing.
  • the counterweight must however remain in its locking position when it will be subjected to efforts related to handling or falling of the projectile.
  • the substrate 13 carries a bar 28 carrying at least one indentation. This bar 28 is intended to cooperate with a complementary cavity 29 carried by the weight 26 to ensure immobilization of the weight 26 in its unlocked position.
  • the shutter 14 itself is slidably mounted in a housing 30 of the substrate 13. Once the latches 17, 22 are removed, the shutter 14 can slide in this housing 30 by the action of the centrifugal force and against the action of a second spring means 31 (here formed by two parallel springs).
  • lamellae 32 which are integral with the flexible tongues 23 and which rub against the lateral surfaces 33 of the weight 26 (surfaces which could possibly carry roughness or roughness).
  • the braking means can slow down the movement 26 of the weight, so to slow the erasure of the centrifugal locks 22. This ensures a mouth security during firing.
  • the arming device 12 will intervene after the course of a certain distance after the exit of the tube of the weapon.
  • the figure 3a shows the device in the position it adopts inside the barrel of the weapon when firing.
  • the firing acceleration causes the appearance of an axial inertia force Fy on the first latch 17. This latch thus releases the flap 14.
  • the latch 17 remains immobilized in its unlocked position by the engagement of the bar 20 in the cavity 21.
  • the flap 14 is, however, still maintained in the safety position by the centrifugal latch 26/22.
  • the figure 3b shows the device in the position that it adopts after its exit from the tube of the weapon and at a distance of the order of about fifty meters.
  • the centrifugal acceleration has caused the appearance of a radial inertia force F 1 ⁇ which is exerted on the flyweight 26.
  • the flyweight has gradually moved away against the action of the second spring means 27 and being slowed down by the friction of the lamellae 32 on the lateral surfaces 33 of the weight 26.
  • the stiffness of the spring means 27, and the braking means 32,33 are defined so as to delay the passage of the weight 26 to its unlocked position, so that the configuration according to the figure 3b only intervenes about fifty meters from the barrel of the weapon. The security is then optimal for the servants of the weapon.
  • the flap 14 is then no longer immobilized by the locks 22 and can therefore adopt its unlocked position ( figure 3c ).
  • the movement of the flap causes the tongues 23 bearing the latches 22 to deflect.
  • the housing 25 is defined with a depth sufficient to allow the bolts 22 to pass between the flyweight 26 and the flap 14.
  • the flap 14 no longer closes the orifices 15a, 15b.
  • the direction of action 16 of the pyrotechnic chain is released and the device is in the armed position. An impact on a target will initiate the explosive charge of the projectile.
  • the flap 14 is locked in its armed position by tabs 36 secured to the substrate 13 and which engage in notches 37 arranged on a side surface of the flap 14 so as to prohibit the return of the latter to its seat. security position.
  • the device according to the invention is extremely simple and compact. It has a totally mechanical structure and can be incorporated into a medium caliber projectile at a lower cost.
  • the axis 35 along which moves the weight 26 and the flap 14 is perpendicular to the axis 16 of the direction of pyrotechnic action.
  • the axis 35 therefore corresponds to a radial direction of the projectile and centrifugal inertia can be exerted on the flyweight 26 and the flap 14.
  • the integration of the device in a projectile is therefore extremely simple despite the reduced dimensions for this device 12. Indeed the pyrotechnic alignment of the axis 16 necessarily leads to a correct orientation of the device relative to the projectile.
  • the forms of the spring means may be different. They will be defined according to the shooting constraints that the projectile must undergo.

Abstract

The device (12) has a substrate (13) on which a pyrotechnic chain interruption flap (14) is placed, where the flap is movable in translation and maintained immobilized by an axial acceleration bolt (17) and a centrifugal bolt. The acceleration bolt is released as a result of application of acceleration communicated to a missile during firing, and the centrifugal bolt is released as a result of rotation of the missile. The centrifugal bolt includes a locking finger (22) integrated to the substrate by a flexible tab (23).

Description

Le domaine technique de l'invention est celui des dispositifs de sécurité et d'armement pour une chaîne pyrotechnique d'un projectile et notamment des dispositifs de sécurité et d'armement micro-usinés.The technical field of the invention is that of security and arming devices for a pyrotechnic chain of a projectile and in particular micro-machined security and arming devices.

Les dispositifs de sécurité (ou DSA) sont bien connus. Ils comportent généralement un écran obturant un canal de transmission qui relie un détonateur et une charge pyrotechnique.Security devices (or DSAs) are well known. They generally comprise a screen closing a transmission channel which connects a detonator and a pyrotechnic charge.

L'écran s'interpose ainsi sur la transmission de l'onde détonique entre le détonateur et la charge et il empêche le fonctionnement de cette dernière.The screen is thus interposed on the transmission of the detonation wave between the detonator and the load and it prevents the operation of the latter.

Un des problèmes rencontrés avec les dispositifs classiques est leur encombrement. Les pièces sont relativement massives pour pouvoir assurer l'interruption de la chaîne pyrotechnique. Les moyens moteurs permettant de déplacer l'écran doivent donc être puissants. On utilise le plus souvent des ressorts qui restent bandés au cours des phases de stockage, ce qui peut conduire à une dégradation de leurs caractéristiques mécaniques et à une perte de la fiabilité de l'armement.One of the problems encountered with conventional devices is their size. The pieces are relatively massive to be able to ensure the interruption of the pyrotechnic chain. The motor means for moving the screen must be powerful. In most cases, springs are used which remain bandaged during the storage phases, which can lead to a degradation of their mechanical characteristics and to a loss of reliability of the armament.

Depuis quelques années il a été proposé de réaliser tout ou partie des dispositifs de sécurité à l'aide de puces incorporant des éléments électro mécaniques micro usinés ou micro gravés soit dans un élément déposé sur un substrat soit directement sur le substrat lui-même. Cette technologie connue sous le nom de MEMS (Micro Electro Mechanical System) permet en effet aujourd'hui de réaliser des micro mécanismes en mettant en oeuvre une technique proche de celle permettant de réaliser les circuits intégrés électroniques.In recent years it has been proposed to carry out all or part of the safety devices using chips incorporating electromechanical micro-machined or micro-etched elements either in an element deposited on a substrate or directly on the substrate itself. This technology known under the name of MEMS (Micro Electro Mechanical System) makes it possible today to achieve micro mechanisms by implementing a technique similar to that for producing electronic integrated circuits.

Le brevet US-6964231 décrit un tel dispositif de sécurité micro-usiné comportant un volet portant une charge pyrotechnique et coulissant par l'action de la force centrifuge. Ce volet est lui-même immobilisé par un verrou qui est effacé par l'accélération de tir du projectile.The patent US 6964231 describes such a micro-machined safety device comprising a flap carrying a pyrotechnic charge and sliding by the action of the centrifugal force. This shutter itself is immobilized by a lock that is erased by the acceleration of firing of the projectile.

Un autre verrou basculant permet de libérer le volet qui est conduit à sa position armée par la force d'inertie centrifuge. Le verrou basculant est actionné par une composition pyrotechnique génératrice de gaz dont l'allumage est commandé par un moyen électronique.Another tilting lock releases the shutter which is led to its armed position by the centrifugal force of inertia. The rocking lock is operated by a pyrotechnic composition generating gas whose ignition is controlled by an electronic means.

Un tel dispositif de sécurité et d'armement permet d'utiliser pour assurer l'armement deux conditions d'environnement indépendantes : l'accélération longitudinale de tir et l'accélération centrifuge. Cette double sécurité permet à ce dispositif d'être conforme aux normes les plus exigeantes en matière de sécurité d'armement des projectiles (STANAG 4187).Such a safety device and armament allows to use for arming two independent environmental conditions: longitudinal firing acceleration and centrifugal acceleration. This double security allows this device to comply with the highest standards of projectile arming safety (STANAG 4187).

Il est cependant de structure complexe et notamment le deuxième verrou (verrou basculant) nécessite la mise en oeuvre d'une composition pyrotechnique ainsi que des moyens d'initiation de celle ci. Une électronique doit donc être prévue pour piloter le fonctionnement de ce MEMS qui est donc peu adapté à une utilisation dans les munitions de moyen calibre (calibre inférieur à 40 mm) pour lesquelles le volume disponible est limité.However, it is of complex structure and in particular the second latch (rocking latch) requires the implementation of a pyrotechnic composition and means of initiation thereof. An electronics must therefore be provided to control the operation of this MEMS which is therefore unsuitable for use in ammunition of medium caliber (caliber less than 40 mm) for which the available volume is limited.

L'invention a pour but de proposer un dispositif de sécurité et d'armement micro usiné, de structure simple et satisfaisant aux conditions de sécurité les plus exigeantes en nécessitant notamment la présence de deux conditions d'environnement indépendantes pour passer en position armée.The object of the invention is to provide a micro-machined safety and arming device, of simple structure and satisfying the most demanding safety conditions, in particular requiring the presence of two independent environmental conditions for moving into an armed position.

Le dispositif selon l'invention met en oeuvre un armement 100% mécanique tout en assurant une interruption de chaîne pyrotechnique fiable.The device according to the invention implements a 100% mechanical armament while ensuring a reliable pyrotechnic chain interruption.

Ainsi, l'invention a pour objet un dispositif de sécurité et d'armement micro-usiné ou micro-gravé pour une chaîne pyrotechnique d'un projectile qui est animé lors du tir d'un mouvement de rotation axiale, dispositif comprenant un substrat sur lequel est disposé un volet d'interruption de chaîne pyrotechnique qui est mobile en translation sur le substrat, dispositif dans lequel le volet d'interruption de chaîne est maintenu immobilisé par au moins deux verrous, un premier verrou (ou verrou d'accélération axiale) qui est libéré comme suite à l'application de l'accélération communiquée au projectile lors du tir et un deuxième verrou, dispositif caractérisé en ce que le deuxième verrou est un verrou centrifuge qui est libéré comme suite à la rotation du projectile.Thus, the subject of the invention is a micro-machined or micro-engraved security and arming device for a pyrotechnic chain of a projectile which is animated when firing an axial rotational movement, a device comprising a substrate on which is disposed a pyrotechnic chain interruption flap which is movable in translation on the substrate, in which device the chain interruption flap is held immobilized by at least two bolts, a first latch (or axial acceleration latch) which is released as a result of the application of the acceleration communicated to the projectile during firing and a second latch, characterized in that the second latch is a centrifugal latch which is released as a result of the rotation of the projectile.

Selon un mode de réalisation préféré, le verrou centrifuge comprend au moins un doigt de verrouillage solidaire du substrat, doigt qui se trouve maintenu dans une empreinte du volet lorsqu'il occupe sa position de verrouillage, le maintien étant assuré par une masselotte centrifuge micro usinée qui est elle-même montée coulissante dans un logement du volet.According to a preferred embodiment, the centrifugal latch comprises at least one interlocking locking finger of the substrate, which finger is held in an impression of the flap when it is in its locking position, the holding being ensured by a micromachined centrifugal flyweight. which is itself slidably mounted in a flap housing.

La masselotte centrifuge sera montée coulissante contre l'action d'un premier moyen ressort.The centrifugal weight will be slidably mounted against the action of a first spring means.

Des moyens de freinage pourront être prévus pour ralentir le déplacement de la masselotte.Braking means may be provided to slow the movement of the weight.

Le volet lui-même pourra avantageusement coulisser par l'action de la force centrifuge et contre l'action d'un deuxième moyen ressort.The flap itself can advantageously slide by the action of the centrifugal force and against the action of a second spring means.

Le doigt de verrouillage pourra être rendu solidaire du substrat par l'intermédiaire d'une languette flexible.The locking finger may be secured to the substrate by means of a flexible tongue.

Selon un mode particulier de réalisation, les moyens de freinage pourront comprendre des lamelles solidaires d'au moins une des languettes flexibles, lamelles venant frotter contre une surface latérale de la masselotte.According to a particular embodiment, the braking means may comprise lamellae secured to at least one of the flexible tongues, lamellae rubbing against a lateral surface of the weight.

Le substrat comportera avantageusement un orifice de part et d'autre du volet, l'axe de ces orifices, donc la direction d'action de la chaîne pyrotechnique, étant sensiblement parallèle au plan du volet.The substrate will advantageously comprise an orifice on either side of the flap, the axis of these orifices, and therefore the direction of action of the pyrotechnic chain, being substantially parallel to the plane of the flap.

L'invention sera mieux comprise à la lecture du descriptif qui va suivre d'un mode particulier de réalisation, description faite en référence aux dessins annexés et dans lesquels :

  • la figure 1 est une vue schématique en coupe d'un projectile de moyen calibre équipé d'une fusée incorporant un dispositif de sécurité et d'armement selon l'invention,
  • la figure 2 est une vue d'un mode de réalisation du dispositif de sécurité et d'armement selon l'invention dans sa position de sécurité,
  • les figures 3a, 3b et 3c montrent ce même dispositif au cours des différentes étapes conduisant à son armement.
The invention will be better understood on reading the following description of a particular embodiment, description made with reference to the accompanying drawings and in which:
  • the figure 1 is a schematic sectional view of a medium-caliber projectile equipped with a rocket incorporating a security and arming device according to the invention,
  • the figure 2 is a view of an embodiment of the safety and arming device according to the invention in its safety position,
  • the figures 3a , 3b and 3c show this same device during the different stages leading to its armament.

La figure 1 montre un projectile 1 de moyen calibre (calibre inférieur à 50 mm), qui comprend un corps 2 renfermant un chargement explosif 3. Le corps 2 reçoit à sa partie avant une fusée 4 qui est vissée dans un taraudage du corps 2. La fusée 4 comprend un boîtier 8 qui renferme une charge d'amorçage 5. La charge d'amorçage 5 est destinée à être initiée par une chaîne pyrotechnique comprenant un détonateur 6 et un relais 7 (alternativement ce relais 7 pourrait être omis et le détonateur 6 initierait alors directement la charge d'amorçage 5). Le détonateur 6 est ici un détonateur à percussion qui est initié par un percuteur 9 monté coulissant dans un nez 10 solidaire du boîtier 8 de la fusée 4. Lors de l'impact du projectile 1 sur une cible, le percuteur 9 est projeté sur le détonateur 6. Le percuteur est maintenu en place lors des phases de stockage et de tir par une rondelle cisaillable 11.The figure 1 shows a projectile 1 of medium caliber (caliber less than 50 mm), which comprises a body 2 enclosing an explosive charge 3. The body 2 receives at its front part a rocket 4 which is screwed into a tapping of the body 2. The rocket 4 comprises a housing 8 which contains a firing charge 5. The firing load 5 is intended to be initiated by a pyrotechnic chain comprising a detonator 6 and a relay 7 (alternatively this relay 7 could be omitted and the detonator 6 would then initiate directly the priming charge 5). The detonator 6 is here a percussion detonator which is initiated by a striker 9 slidably mounted in a nose 10 secured to the casing 8 of the rocket 4. During the impact of the projectile 1 on a target, the striker 9 is projected onto the detonator 6. The striker is held in place during the storage and firing phases by a shear washer 11.

Il est bien entendu possible de mettre en oeuvre le dispositif selon l'invention avec un détonateur 6 électrique commandé par exemple par un moyen électronique de chronométrie ou un détecteur de proximité.It is of course possible to implement the device according to the invention with an electric detonator 6 controlled for example by an electronic chronometry means or a proximity detector.

La fusée 4 renferme également un dispositif de sécurité et d'armement 12 qui permet d'interrompre la chaîne pyrotechnique au cours des phases de stockage et de début de tir du projectile 1.The rocket 4 also contains a security and arming device 12 which makes it possible to interrupt the pyrotechnic chain during the storage and firing phases of the projectile 1.

Conformément à l'invention, ce dispositif de sécurité et d'armement est réalisé sous la forme d'un dispositif micro-usiné ou micro-gravé (MEMS). Il comprend ainsi un substrat 13 sur lequel est monté un volet coulissant 14 qui assure l'interruption de la chaîne pyrotechnique.According to the invention, this safety and arming device is made in the form of a micro-machined or micro-engraved device (MEMS). It thus comprises a substrate 13 on which is mounted a sliding shutter 14 which ensures the interruption of the pyrotechnic chain.

Le substrat 13 comporte deux orifices 15a et 15b disposés de part et d'autre du volet 14. L'axe de ces orifices 15a,15b, donc la direction d'action de la chaîne pyrotechnique (6-7), est ainsi sensiblement parallèle au plan du volet 14.The substrate 13 has two orifices 15a and 15b disposed on either side of the flap 14. The axis of these orifices 15a, 15b, therefore the direction of action of the pyrotechnic chain (6-7), is thus substantially parallel in terms of component 14.

Une telle disposition d'un volet d'interruption de chaîne pyrotechnique de telle sorte que la direction de la chaîne pyrotechnique se trouve en regard de l'épaisseur du volet 14 et non perpendiculaire au plan du volet (comme dans les dispositifs MEMS habituels) est connue notamment du brevet EP1780496 .Such an arrangement of a pyrotechnic warp shutter such that the direction of the pyrotechnic chain is opposite the thickness of the flap 14 and not perpendicular to the plane of the flap (as in the usual MEMS devices) is known in particular from the patent EP1780496 .

L'Homme du Métier se reportera à ce brevet qui décrit les caractéristiques générales d'un tel type de chaîne d'amorçage et du volet qui lui est associé.Those skilled in the art will refer to this patent which describes the general characteristics of such a type of priming chain and the shutter associated therewith.

On note ainsi que le détonateur 6 devra avoir la taille minimale permettant d'assurer le fonctionnement et il sera couplé à un relais pyrotechnique 7 (ou 5) approprié. On a pu vérifier qu'en mettant en oeuvre un détonateur comportant un étage de sortie de 10 milligrammes d'Hexogène couplé à un relais très peu sensible, par exemple en HNS (hexanotrostilbène), il était possible de réaliser des orifices 15a, 15b (ou canaux de transmission) de moins de 1 mm2 de section (diamètre de canal de l'ordre du mm) tout en garantissant la transmission d'initiation souhaitée.It should be noted that the detonator 6 must have the minimum size to ensure operation and it will be coupled to a suitable pyrotechnic relay 7 (or 5). It has been verified that by using a detonator comprising an output stage of 10 milligrams of Hexogen coupled to a very insensitive relay, for example in HNS (hexanotrostilbene), it was possible to make orifices 15a, 15b ( or transmission channels) of less than 1 mm 2 section (channel diameter of the order of mm) while guaranteeing the desired initiation transmission.

Il est ainsi possible d'assurer une interruption de l'effet pyrotechnique avec un volet de silicium ayant une longueur L de l'ordre de 3 mm ce qui est tout à fait réalisable avec les technologies MEMS. Cette longueur de silicium de l'ordre de 3mm correspond donc ici à la dimension L du volet 14 repérée sur les figures 1 et 2.It is thus possible to ensure an interruption of the pyrotechnic effect with a silicon flap having a length L of the order of 3 mm which is quite feasible with MEMS technologies. This length of silicon of the order of 3 mm therefore corresponds here to the dimension L of the flap 14 identified on the figures 1 and 2 .

Le projectile 1 est par ailleurs doté d'une ceinture 2a qui prend les rayures du tube de l'arme (non représenté) et qui communique au projectile 1 un mouvement de rotation autour de son axe lors du tir.The projectile 1 is also provided with a belt 2a which takes the scratches of the barrel of the weapon (not shown) and which communicates to the projectile 1 a rotational movement about its axis during firing.

La figure 2 montre de façon plus détaillée la structure interne du dispositif de sécurité 12 selon l'invention.The figure 2 shows in more detail the internal structure of the safety device 12 according to the invention.

Le dispositif comprend donc un substrat 13 sur lequel est disposé un volet 14 d'interruption de chaîne pyrotechnique qui est mobile en translation sur le substrat.The device therefore comprises a substrate 13 on which is disposed a pyrotechnic chain interruption flap 14 which is movable in translation on the substrate.

Le volet 14 est réalisé par micro-usinage ou micro-gravure suivant les techniques de réalisation des MEMS qui sont bien connues de l'Homme du Métier.The flap 14 is made by micro-machining or micro-etching according to MEMS production techniques which are well known to those skilled in the art.

On a représenté sur les figures les orifices 15a et 15b qui sont disposés de part et d'autre du volet 14 ainsi que l'axe 16 de ces orifices (donc la direction d'action de la chaîne pyrotechnique). La dimension L du volet 14 assure l'interruption de la chaîne pyrotechnique dans la position de sécurité du dispositif 12.There is shown in the figures the orifices 15a and 15b which are disposed on either side of the flap 14 and the axis 16 of these orifices (thus the direction of action of the pyrotechnic chain). The dimension L of the shutter 14 ensures the interruption of the pyrotechnic chain in the safety position of the device 12.

Le volet 14 d'interruption de chaîne est maintenu immobilisé par deux verrous.The chain interruption flap 14 is held immobilized by two bolts.

Un premier verrou 17 (ou verrou d'accélération axiale) et un deuxième verrou qui est un verrou centrifuge libéré comme suite à la rotation du projectile 1.A first latch 17 (or axial acceleration latch) and a second latch which is a centrifugal latch released as a result of the rotation of the projectile 1.

Ainsi, contrairement au dispositif connu de US6964231 qui nécessite un verrou basculant actionné par une composition pyrotechnique spécifique, le dispositif selon l'invention utilise directement l'inertie centrifuge pour déverrouiller le volet 14 tout en maintenant cependant la sécurité de début de trajectoire (pas d'armement avant une certaine distance parcourue hors du tube).Thus, unlike the known device of US6964231 which requires a rocking latch actuated by a specific pyrotechnic composition, the device according to the invention directly uses the centrifugal inertia to unlock the flap 14 while maintaining the safety of the beginning of trajectory (no arming before a certain distance traveled out of the tube).

Le premier verrou 17 coopère avec une encoche 18a portée par une tige 18 solidaire du volet 14.The first latch 17 cooperates with a notch 18a carried by a rod 18 secured to the flap 14.

Ce verrou 17 est maintenu engagé dans la tige 18 par un moyen ressort 19 interposé entre le verrou 17 et le substrat 13.This latch 17 is held engaged in the rod 18 by a spring means 19 interposed between the latch 17 and the substrate 13.

Le verrou 17 porte également une barrette 20 portant au moins une indentation. Cette barrette 20 est destinée à coopérer avec une cavité complémentaire 21 portée par le substrat pour assurer une immobilisation du premier verrou 17 dans sa position déverrouillée.The latch 17 also carries a bar 20 carrying at least one indentation. This bar 20 is intended to cooperate with a complementary cavity 21 carried by the substrate to ensure immobilization of the first latch 17 in its unlocked position.

Le moyen ressort 19 est bien entendu lui aussi réalisé suivant les technologies de micro-usinage ou micro-gravure (technologies MEMS). Les caractéristiques mécaniques du moyen ressort 19 sont choisies de telle sorte que le verrou 17 ne soit dégagé que comme suite aux efforts liés à l'accélération de tir du projectile 1. Ce verrou devra par contre rester dans sa position de verrouillage lorsqu'il est soumis aux efforts liés aux manipulations ou chutes du projectile.The spring means 19 is of course also made according to micro-machining or micro-etching technologies (MEMS technologies). The mechanical characteristics of the spring means 19 are chosen so that the latch 17 is released only as a result of the forces related to the firing acceleration of the projectile 1. This latch will however remain in its locking position when it is subjected to the efforts related to the handling or falling of the projectile.

Le verrou centrifuge comprend au moins un doigt de verrouillage 22 qui est solidaire du substrat 13.The centrifugal latch comprises at least one locking pin 22 which is integral with the substrate 13.

Le dispositif comprend ici deux doigts 22 réalisés sous la forme de disques cylindriques micro-usinés ou micro-gravés et rendus solidaires du substrat 13 par l'intermédiaire de languettes flexibles 23, elles aussi micro usinées ou micro-gravées.The device here comprises two fingers 22 made in the form of cylindrical micro-machined or micro-etched discs and made integral with the substrate 13 via flexible tongues 23, also micro-machined or micro-engraved.

Chaque doigt 22 se loge dans une empreinte 24 de forme complémentaire et qui est aménagée dans un logement 25 du volet 14.Each finger 22 is housed in a recess 24 of complementary shape and which is arranged in a housing 25 of the flap 14.

Dans la position de verrouillage représentée à la figure 2, les doigts 22 sont maintenus dans les empreintes 24 par une masselotte centrifuge 26 micro usinée ou micro-gravée qui est elle-même montée coulissante par rapport au substrat 13 et dans le logement 25 du volet 14.In the locking position shown in figure 2 the fingers 22 are held in the cavities 24 by a micromachined or micro-engraved centrifugal feeder 26 which is itself slidably mounted with respect to the substrate 13 and in the housing 25 of the shutter 14.

La masselotte 26 est maintenue dans sa position de verrouillage (figure 2) par un premier moyen ressort 27 (lui aussi micro usiné ou micro-gravé). Bien entendu les caractéristiques mécaniques du premier moyen ressort 27 sont choisies de telle sorte que la masselotte 26 ne se déplace que comme suite aux efforts liés à l'accélération centrifuge résultant de la rotation du projectile 1 lors du tir. La masselotte devra par contre rester dans sa position de verrouillage lorsqu'elle sera soumise aux efforts liés aux manipulations ou chutes du projectile.The weight 26 is held in its locking position ( figure 2 ) by a first spring means 27 (also micro-machined or micro-engraved). Of course the mechanical characteristics of the first spring means 27 are chosen so that the weight 26 moves only as a result of the forces related to the centrifugal acceleration resulting from the rotation of the projectile 1 during firing. The counterweight must however remain in its locking position when it will be subjected to efforts related to handling or falling of the projectile.

Le substrat 13 porte une barrette 28 portant au moins une indentation. Cette barrette 28 est destinée à coopérer avec une cavité complémentaire 29 portée par la masselotte 26 pour assurer une immobilisation de la masselotte 26 dans sa position déverrouillée.The substrate 13 carries a bar 28 carrying at least one indentation. This bar 28 is intended to cooperate with a complementary cavity 29 carried by the weight 26 to ensure immobilization of the weight 26 in its unlocked position.

Le volet 14 lui-même est monté coulissant dans un logement 30 du substrat 13. Une fois les verrous 17, 22 retirés, le volet 14 peut coulisser dans ce logement 30 par l'action de la force centrifuge et contre l'action d'un deuxième moyen ressort 31 (formé ici de deux ressorts parallèles).The shutter 14 itself is slidably mounted in a housing 30 of the substrate 13. Once the latches 17, 22 are removed, the shutter 14 can slide in this housing 30 by the action of the centrifugal force and against the action of a second spring means 31 (here formed by two parallel springs).

Enfin des moyens de freinage sont prévus pour ralentir le déplacement de la masselotte 26.Finally braking means are provided to slow the movement of the weight 26.

Ces moyens comprennent des lamelles 32 qui sont solidaires des languettes flexibles 23 et qui frottent contre les surfaces latérales 33 de la masselotte 26 (surfaces qui pourraient porter éventuellement des aspérités ou rugosités). Les moyens de freinage permettent de ralentir le déplacement de la masselotte 26, donc de ralentir l'effacement des verrous centrifuges 22. On assure ainsi une sécurité de bouche lors du tir. L'armement du dispositif 12 n'interviendra qu'après le parcours d'une certaine distance après la sortie du tube de l'arme.These means comprise lamellae 32 which are integral with the flexible tongues 23 and which rub against the lateral surfaces 33 of the weight 26 (surfaces which could possibly carry roughness or roughness). The braking means can slow down the movement 26 of the weight, so to slow the erasure of the centrifugal locks 22. This ensures a mouth security during firing. The arming device 12 will intervene after the course of a certain distance after the exit of the tube of the weapon.

Le fonctionnement de ce dispositif va maintenant être décrit en référence aux figures 3a à 3c.The operation of this device will now be described with reference to Figures 3a to 3c .

La figure 3a montre le dispositif dans la position qu'il adopte à l'intérieur du tube de l'arme lors du tir.The figure 3a shows the device in the position it adopts inside the barrel of the weapon when firing.

L'accélération de tir entraîne l'apparition d'une force d'inertie axiale Fy sur le premier verrou 17. Ce verrou libère donc le volet 14. Le verrou 17 reste immobilisé dans sa position déverrouillée par l'engagement de la barrette 20 dans la cavité 21.The firing acceleration causes the appearance of an axial inertia force Fy on the first latch 17. This latch thus releases the flap 14. The latch 17 remains immobilized in its unlocked position by the engagement of the bar 20 in the cavity 21.

Le volet 14 est cependant toujours maintenu en position de sécurité par le verrou centrifuge 26/22.The flap 14 is, however, still maintained in the safety position by the centrifugal latch 26/22.

En effet la vitesse de rotation n'est pas encore suffisante pour provoquer l'écartement de la masselotte 26. L'interruption de la chaîne pyrotechnique par le volet 14 est donc toujours assurée.Indeed the speed of rotation is not yet sufficient to cause the separation of the feeder 26. The interruption of the pyrotechnic chain by the flap 14 is always ensured.

La figure 3b montre le dispositif dans la position qu'il adopte après sa sortie du tube de l'arme et à une distance de l'ordre d'une cinquantaine de mètres.The figure 3b shows the device in the position that it adopts after its exit from the tube of the weapon and at a distance of the order of about fifty meters.

L'accélération centrifuge a entraîné l'apparition d'une force d'inertie radiale F1ω qui s'exerce sur la masselotte 26. La masselotte s'est progressivement écartée contre l'action du deuxième moyen ressort 27 et en étant ralentie par le frottement des lamelles 32 sur les surfaces latérales 33 de la masselotte 26.The centrifugal acceleration has caused the appearance of a radial inertia force F 1 ω which is exerted on the flyweight 26. The flyweight has gradually moved away against the action of the second spring means 27 and being slowed down by the friction of the lamellae 32 on the lateral surfaces 33 of the weight 26.

La raideur du moyen ressort 27, et les moyens de freinage 32,33 sont définis de façon à retarder le passage de la masselotte 26 à sa position déverrouillée, de telle sorte que la configuration selon la figure 3b n'intervienne qu'à une cinquantaine de mètres du tube de l'arme. La sécurité est alors optimale pour les servants de l'arme.The stiffness of the spring means 27, and the braking means 32,33 are defined so as to delay the passage of the weight 26 to its unlocked position, so that the configuration according to the figure 3b only intervenes about fifty meters from the barrel of the weapon. The security is then optimal for the servants of the weapon.

Une fois la masselotte 26 verrouillée dans cette position par l'engagement de la barrette 28 dans la cavité complémentaire 29, les verrous centrifuges 22 ne sont plus maintenus par la masselotte 26 (qui comporte par ailleurs des profils avant 34 en biseau qui facilitent la libération des verrous 22).Once the weight 26 locked in this position by the engagement of the bar 28 in the complementary cavity 29, the centrifugal locks 22 are no longer maintained by the weight 26 (which also comprises profiles before 34 bevel that facilitate the release of the locks 22).

Le volet 14 n'est alors plus immobilisé par les verrous 22 et il peut donc adopter sa position déverrouillée (figure 3c).The flap 14 is then no longer immobilized by the locks 22 and can therefore adopt its unlocked position ( figure 3c ).

Il est déplacé lui aussi par l'effet d'une force d'inertie centrifuge F2ω et contre l'action des seconds moyens ressort 31.It is also displaced by the effect of a centrifugal inertia force F 2 ω and against the action of the second spring means 31.

Le déplacement du volet entraîne le fléchissement des languettes 23 portant les verrous 22. Le logement 25 est défini avec une profondeur suffisante pour autoriser le passage des verrous 22 entre la masselotte 26 et le volet 14.The movement of the flap causes the tongues 23 bearing the latches 22 to deflect. The housing 25 is defined with a depth sufficient to allow the bolts 22 to pass between the flyweight 26 and the flap 14.

Le volet 14 n'obture plus les orifices 15a,15b. La direction d'action 16 de la chaîne pyrotechnique est donc libérée et le dispositif est en position armée. Un impact sur une cible entraînera l'initiation de la charge explosive du projectile.The flap 14 no longer closes the orifices 15a, 15b. The direction of action 16 of the pyrotechnic chain is released and the device is in the armed position. An impact on a target will initiate the explosive charge of the projectile.

On notera que le volet 14 se trouve verrouillé dans sa position armée par des languettes 36 solidaires du substrat 13 et qui viennent s'engager dans des encoches 37 aménagées sur une surface latérale du volet 14 de façon à interdire le retour de ce dernier à sa position de sécurité.Note that the flap 14 is locked in its armed position by tabs 36 secured to the substrate 13 and which engage in notches 37 arranged on a side surface of the flap 14 so as to prohibit the return of the latter to its seat. security position.

On voit que le dispositif selon l'invention est extrêmement simple et peu encombrant. Il a une structure totalement mécanique et il peut être incorporé à un projectile de moyen calibre à moindre coût.We see that the device according to the invention is extremely simple and compact. It has a totally mechanical structure and can be incorporated into a medium caliber projectile at a lower cost.

L'axe 35 suivant lequel se déplace la masselotte 26 et le volet 14 est perpendiculaire à l'axe 16 de la direction d'action pyrotechnique. Lorsque le dispositif est mis en place dans un projectile, l'axe 35 correspond donc à une direction radiale du projectile et l'inertie centrifuge pourra s'exercer sur la masselotte 26 et le volet 14. L'intégration du dispositif dans un projectile est donc extrêmement simple malgré les dimensions réduites pour ce dispositif 12. En effet l'alignement pyrotechnique de l'axe 16 conduit obligatoirement à une orientation correcte du dispositif par rapport au projectile.The axis 35 along which moves the weight 26 and the flap 14 is perpendicular to the axis 16 of the direction of pyrotechnic action. When the device is placed in a projectile, the axis 35 therefore corresponds to a radial direction of the projectile and centrifugal inertia can be exerted on the flyweight 26 and the flap 14. The integration of the device in a projectile is therefore extremely simple despite the reduced dimensions for this device 12. Indeed the pyrotechnic alignment of the axis 16 necessarily leads to a correct orientation of the device relative to the projectile.

Diverses variantes sont possibles sans sortir du cadre de l'invention.Various variants are possible without departing from the scope of the invention.

Il est possible notamment d'adopter des solutions techniques différentes pour les moyens 20/21, 28/29 assurant l'immobilisation des verrous. Les formes des moyens ressorts pourront être différentes. Elles seront définies en fonction des contraintes de tir que doit subir le projectile.It is possible in particular to adopt different technical solutions for the means 20/21, 28/29 ensuring the immobilization of the locks. The forms of the spring means may be different. They will be defined according to the shooting constraints that the projectile must undergo.

Il est également possible d'associer le dispositif de sécurité et d'armement selon l'invention à un détonateur 6 à initiation électrique couplée par exemple à un moyen électronique de chronométrie ou de détection de proximité.It is also possible to associate the safety and arming device according to the invention with an electric initiation detonator 6 coupled for example to an electronic means of chronometry or proximity detection.

Claims (8)

Dispositif de sécurité et d'armement (12) micro-usiné ou micro-gravé pour une chaîne pyrotechnique d'un projectile (1) qui est animé lors du tir d'un mouvement de rotation axiale, dispositif comprenant un substrat (13) sur lequel est disposé un volet (14) d'interruption de chaîne pyrotechnique qui est mobile en translation sur le substrat (13), dispositif dans lequel le volet (14) d'interruption de chaîne est maintenu immobilisé par au moins deux verrous (lè,22), un premier verrou (17) (ou verrou d'accélération axiale) qui est libéré comme suite à l'application de l'accélération communiquée au projectile (1) lors du tir et un deuxième verrou (22), dispositif caractérisé en ce que le deuxième verrou (22) est un verrou centrifuge qui est libéré comme suite à la rotation du projectile (1).Micro-machined or micro-engraved security and arming device (12) for a pyrotechnic chain of a projectile (1) which is animated when firing an axial rotation movement, device comprising a substrate (13) on which is disposed a flap (14) of pyrotechnic chain interruption which is movable in translation on the substrate (13), in which device the flap (14) chain interruption is held immobilized by at least two latches (le, 22), a first latch (17) (or axial acceleration latch) which is released as a result of the application of the acceleration communicated to the projectile (1) upon firing and a second latch (22), characterized that the second latch (22) is a centrifugal lock which is released in response to the rotation of the projectile (1). Dispositif de sécurité et d'armement selon la revendication 1, caractérisé en ce que le verrou centrifuge comprend au moins un doigt de verrouillage (22) solidaire du substrat (13), doigt qui se trouve maintenu dans une empreinte (24) du volet (14) lorsqu'il occupe sa position de verrouillage, le maintien étant assuré par une masselotte centrifuge (26) micro usinée qui est elle-même montée coulissante dans un logement (25) du volet (14).Security and arming device according to claim 1, characterized in that the centrifugal latch comprises at least one locking pin (22) integral with the substrate (13), which finger is held in a cavity (24) of the flap ( 14) when it occupies its locking position, the maintenance being provided by a micromachined centrifugal flyweight (26) which is itself slidably mounted in a housing (25) of the flap (14). Dispositif de sécurité et d'armement selon la revendication 2, caractérisé en ce que la masselotte centrifuge (26) est montée coulissante contre l'action d'un premier moyen ressort (27).Security and arming device according to claim 2, characterized in that the centrifugal weight (26) is slidably mounted against the action of a first spring means (27). Dispositif de sécurité et d'armement selon la revendication 3, caractérisé en ce que des moyens de freinage (32) sont prévus pour ralentir le déplacement de la masselotte (26).Security and arming device according to claim 3, characterized in that braking means (32) are provided for slowing the displacement of the weight (26). Dispositif de sécurité et d'armement selon une des revendications 1 à 4, caractérisé en ce que le volet (14) lui-même coulisse par l'action de la force centrifuge et contre l'action d'un deuxième moyen ressort (31).Security and arming device according to one of claims 1 to 4, characterized in that the flap (14) itself slides by the action of the centrifugal force and against the action of a second spring means (31) . Dispositif de sécurité et d'armement selon une des revendications 2 à 5, caractérisé en ce que le doigt de verrouillage (22) est solidaire du substrat (13) par l'intermédiaire d'une languette flexible (23).Security and arming device according to one of Claims 2 to 5, characterized in that the finger of locking (22) is secured to the substrate (13) by means of a flexible tongue (23). Dispositif de sécurité et d'armement selon les revendications 4 et 6, caractérisé en ce que les moyens de freinage comprennent des lamelles (32) solidaires d'au moins une des languettes flexibles (23), lamelles venant frotter contre une surface latérale de la masselotte (26).Security and arming device according to claims 4 and 6, characterized in that the braking means comprise lamellae (32) secured to at least one of the flexible tongues (23), lamellae rubbing against a lateral surface of the flyweight (26). Dispositif de sécurité et d'armement selon une des revendications 1 à 7, caractérisé en ce que le substrat (13) comporte un orifice (15a,15b) de part et d'autre du volet (14), l'axe (16) de ces orifices, donc la direction d'action de la chaîne pyrotechnique, étant sensiblement parallèle au plan du volet (14).Security and arming device according to one of claims 1 to 7, characterized in that the substrate (13) has an orifice (15a, 15b) on either side of the flap (14), the axis (16) these orifices, so the direction of action of the pyrotechnic chain, being substantially parallel to the plane of the flap (14).
EP09290003.4A 2008-01-07 2009-01-06 Micro-machined or micro-engraved safing and arming device Active EP2077431B1 (en)

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FR0800069A FR2926134B1 (en) 2008-01-07 2008-01-07 MICRO-FACTORY OR MICRO-GRAVE SECURITY AND ARMING DEVICE

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Cited By (15)

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Publication number Priority date Publication date Assignee Title
EP2402706A1 (en) 2010-07-02 2012-01-04 Nexter Munitions Safety and arming device with MEMS technology inertia lock
EP2402707A1 (en) 2010-07-02 2012-01-04 Nexter Munitions Anti-adhesion raised patterns for a safety and arming device
FR2962209A1 (en) * 2010-07-02 2012-01-06 Nexter Munitions RELIEF ANTI ADHERENCE FOR SAFETY AND ARMING DEVICE
FR2962210A1 (en) * 2010-07-02 2012-01-06 Nexter Munitions INTEGRAL SECURITY AND ARMING DEVICE WITH MEMS TECHNOLOGY
US9194682B2 (en) 2010-07-02 2015-11-24 Nexter Munitions Safety and arming device for a projectile and using micro electro-mechanical technology
US8656837B2 (en) 2010-07-02 2014-02-25 Nexter Munitions Safety and arming device for projectiles inertial lock with MEMS technology
EP2482028A1 (en) 2011-01-31 2012-08-01 NEXTER Munitions Security and weaponry device with breakable bolt
FR2971048A1 (en) * 2011-01-31 2012-08-03 Nexter Munitions SECURITY AND ARMING DEVICE WITH A CASSABLE LATCH
FR2971050A1 (en) * 2011-01-31 2012-08-03 Nexter Munitions SECURITY AND ARMING DEVICE FOR A PYROTECHNIC CHAIN OF A PROJECTILE
FR2971049A1 (en) * 2011-01-31 2012-08-03 Nexter Munitions DEVICE FOR TIMING A MOTION OF A MICRO-MACHINED MASSELOTTE AND A SAFETY AND ARMING DEVICE COMPRISING SUCH A TIMER
US8459184B2 (en) 2011-01-31 2013-06-11 Nexter Munitions Safety and arming device for a pyrotechnic train of a projectile
EP2482027A1 (en) 2011-01-31 2012-08-01 NEXTER Munitions Weaponry and security device for a pyrotechnic chain of a missile
US8689690B2 (en) 2011-01-31 2014-04-08 Nexter Munitions Safety and arming device with breakable lock
US8714090B2 (en) 2011-01-31 2014-05-06 Nexter Munitions Time control device for the movement of a micro-machined and safety and arming device comprising such a time control device
EP2482029A1 (en) 2011-01-31 2012-08-01 NEXTER Munitions Device for timing a movement of a micro-machined balance weight and security and weaponry device including such a timer device

Also Published As

Publication number Publication date
ES2429491T3 (en) 2013-11-15
US20090205526A1 (en) 2009-08-20
EP2077431A3 (en) 2010-02-10
FR2926134A1 (en) 2009-07-10
EP2077431B1 (en) 2013-07-17
PL2077431T3 (en) 2013-12-31
FR2926134B1 (en) 2010-03-26
US8166880B2 (en) 2012-05-01

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