EP2390617B1 - Secured detonator - Google Patents

Secured detonator Download PDF

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Publication number
EP2390617B1
EP2390617B1 EP20110290241 EP11290241A EP2390617B1 EP 2390617 B1 EP2390617 B1 EP 2390617B1 EP 20110290241 EP20110290241 EP 20110290241 EP 11290241 A EP11290241 A EP 11290241A EP 2390617 B1 EP2390617 B1 EP 2390617B1
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European Patent Office
Prior art keywords
plate
detonator
stage
composition
projected
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EP20110290241
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German (de)
French (fr)
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EP2390617A1 (en
Inventor
Gérard Tanguy
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Nexter Munitions SA
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Nexter Munitions SA
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Publication of EP2390617A1 publication Critical patent/EP2390617A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F42B3/12—Bridge initiators
    • F42B3/124—Bridge initiators characterised by the configuration or material of the bridge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F42B3/113—Initiators therefor activated by optical means, e.g. laser, flashlight

Definitions

  • the technical field of the invention is that of detonators plate or projected element.
  • This type of detonator as described in US6374740 comprises a body in which there is a first stage, or inflammatory stage, comprising at least a first pyrotechnic composition or an explosive secondary explosive.
  • a relay stage comprising at least one secondary explosive.
  • the first composition may be initiatable by an optical means such as an optical fiber or an electrical means (hot wire) while the secondary explosive is initiatable by an impact. This is why a thin metal plate is placed between the two pyrotechnic stages. Following the custom initiation of the first composition, the metal plate is projected onto the secondary explosive which will then be initiated following the energy of the shock provided by the plate.
  • the first composition may react and cause the projection of the plate and thereby the reaction of the secondary explosive and the whole of the pyrotechnic chain.
  • the invention proposes to set up a fuseplatable plate at a temperature below the instability temperature of the igniter stage.
  • the subject of the invention is a detonator comprising a plate projected by an igniter stage comprising at least a first pyrotechnic composition and / or a first explosive on a relay stage comprising at least one secondary explosive, detonator characterized in that the plate projected is made of a fusible material at a temperature below the instability temperature of the igniter stage.
  • the melting temperature T of the plate is at least 15 ° C. lower than the instability temperature of the igniter stage.
  • the plate may be made of a tin-based alloy.
  • the first pyrotechnic composition of the igniter stage may be in contact with the end of an optical fiber.
  • the detonator 1 comprises a substantially cylindrical body 2 having three parts 2a, 2b and 2c.
  • the central portion 2b of the body has an external thread 2d for securing the detonator with a mounting for receiving such a munition (assembly not shown).
  • a sheathed optical fiber 3 passes through the rear part 2a of the body.
  • the optical fiber 3 opens in contact with a first pyrotechnic composition 4 photosensitive forming here the igniter stage of the detonator.
  • a first pyrotechnic composition 4 photosensitive forming here the igniter stage of the detonator.
  • a first pyrotechnic composition 4 a composition combining zirconium and potassium perchlorate. Such a composition is conventional and it is not necessary to describe it in more detail.
  • Other types of pyrotechnic compositions may be used such as: boron / potassium nitrate, boron / zirconium / potassium nitrate .
  • the secondary explosive may be pure or incorporate an optical dopant as described by the patent EP1742009 .
  • a layer of pyrotechnic ignition composition (such as a zirconium / potassium perchlorate composition) in contact with the optical fiber and which ignites a layer of a secondary explosive will be associated with the ignor stage. explosion, for example octogen.
  • pyrotechnic ignition composition such as a zirconium / potassium perchlorate composition
  • the patent EP1306643 describes such an association of an ignition composition and a secondary explosive.
  • the igniter stage comprises a first composition (and / or a secondary explosive explosion) having a particle size perfectly controlled and relatively reduced (less than or equal to 60 micrometers).
  • This first pyrotechnic composition 4 is loaded into a case 5 whose bottom comprises a projectable metal plate 6 (also called projected element 6).
  • the case 5 has an annular area surrounding the rear portion 2a of the body and is welded to the rear portion 2a to seal.
  • the case 5 is thus held in position by a thread 9 solidarisant the rear part of the body 2a to the central part of the body 2b.
  • the metal plate 6 is supported by its periphery on a shoulder of the front portion 2c of the body 2.
  • a secondary explosive 7 sensitive to shock which forms a relay stage.
  • the distance D will be chosen by the person skilled in the art as being that which makes it possible to obtain the optimal projection speed at the shock release of the secondary explosive 7 by virtue of the characteristics of the igniter stage, and therefore especially of the nature and the mass of the first composition 4 and the mass of the plate.
  • the invention proposes that the projectable metal plate is made of a metal or metal alloy whose melting temperature is at least 15 ° C lower than the reaction temperature of the metal.
  • the inflammatory stage thus here the first pyrotechnic composition 4 or, in the case of an inflammatory stage comprising several layers, less than the reaction temperature of the most temperature-sensitive layer (usually the explosive secondary explosive layer).
  • the pyrotechnic compositions and secondary explosives commonly used in this type of detonator which are thermally stable up to at least 230 ° C, the following examples of alloys can be used for producing the projectable plate.
  • lead alloys are also feasible but is not to be favored for environmental and normative reasons.
  • the figure 2 shows the detonator 2 when it has been subjected to a temperature of the order of 215 ° C., ie approximately 15 ° below the reaction temperature of the first pyrotechnic composition 4.
  • the projectable metal plate 6 has melted at this temperature T while the first composition 4 has remained stable. If the temperature continues to increase up to the instability temperature of the first composition 4, it will react but it will not be able to project the plate 6 which will not cause the detonation of the explosive 7. In the case the most unfavorable, the secondary explosive 7 will be able to deflagrate what will not be enough to trigger the continuation of the pyrotechnic chain.
  • the plate 6 as a pinch between the case 5 and the front portion 2c of the body 2.
  • the plate 6 could be secured to the case and form for example a closing flap closing this case. In this case the outer edge of the case will be crimped on the plate 6.
  • the invention has also been described with an igniter stage initiated by an optical fiber.
  • the invention can also be implemented with an igniter stage initiated in a more conventional manner by the electrical energy, for example a hot-wire or exploded-wire igniter.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Air Bags (AREA)

Description

Le domaine technique de l'invention est celui des détonateurs à plaque ou élément projeté.The technical field of the invention is that of detonators plate or projected element.

Ce type de détonateur tel que décrit dans US6374740 comporte un corps dans lequel se trouve un premier étage, ou étage inflammateur, comprenant au moins une première composition pyrotechnique ou un explosif secondaire déflagrant. En regard de ce premier étage inflammateur se trouve un étage relais comprenant au moins un explosif secondaire. La première composition peut être initiable par un moyen optique tel qu'une fibre optique ou un moyen électrique (fil chaud) alors que l'explosif secondaire est initiable par un choc. C'est pourquoi une plaque de métal mince est placée entre les deux étages pyrotechniques. Suite à l'initiation sur commande de la première composition, la plaque de métal est projetée sur l'explosif secondaire qui va alors s'initier suite à l'énergie du choc fourni par la plaque.This type of detonator as described in US6374740 comprises a body in which there is a first stage, or inflammatory stage, comprising at least a first pyrotechnic composition or an explosive secondary explosive. In front of this first stage igniter is a relay stage comprising at least one secondary explosive. The first composition may be initiatable by an optical means such as an optical fiber or an electrical means (hot wire) while the secondary explosive is initiatable by an impact. This is why a thin metal plate is placed between the two pyrotechnic stages. Following the custom initiation of the first composition, the metal plate is projected onto the secondary explosive which will then be initiated following the energy of the shock provided by the plate.

Ce fonctionnement présente un inconvénient sécuritaire. En cas d'exposition du détonateur à une forte chaleur due à un incendie par exemple, la première composition risque de réagir et de provoquer la projection de la plaque et par-là même la réaction de l'explosif secondaire et de l'ensemble de la chaine pyrotechnique.This operation has a security disadvantage. If exposure of the detonator to high heat due to a fire for example, the first composition may react and cause the projection of the plate and thereby the reaction of the secondary explosive and the whole of the pyrotechnic chain.

Pour remédier à ce problème, l'invention se propose de mettre en place une plaque projetable fusible à une température inférieure à la température d'instabilité de l'étage inflammateur.To remedy this problem, the invention proposes to set up a fuseplatable plate at a temperature below the instability temperature of the igniter stage.

Ainsi l'invention à pour objet un détonateur comportant une plaque projetée par un étage inflammateur comprenant au moins une première composition pyrotechnique et/ou un premier explosif sur un étage relais comprenant au moins un explosif secondaire, détonateur caractérisé en ce que la plaque projetée est réalisée en un matériau fusible à une température inférieure à la température d'instabilité de l'étage inflammateur.Thus, the subject of the invention is a detonator comprising a plate projected by an igniter stage comprising at least a first pyrotechnic composition and / or a first explosive on a relay stage comprising at least one secondary explosive, detonator characterized in that the plate projected is made of a fusible material at a temperature below the instability temperature of the igniter stage.

Avantageusement, la température T de fusion de la plaque est inférieure d'au moins 15°C à la température d'instabilité de l'étage inflammateur.Advantageously, the melting temperature T of the plate is at least 15 ° C. lower than the instability temperature of the igniter stage.

La plaque pourra être réalisée en un alliage à base d'étain.The plate may be made of a tin-based alloy.

Selon différents modes de réalisation, la plaque pourra être réalisée en un alliage choisi parmi les alliages ayant les compositions suivantes :

  • SnAg3.4Bi4.8 ou SnBi7.5Ag2.0 ou SnZn9 ou SnZn8Bi3.
According to various embodiments, the plate may be made of an alloy chosen from alloys having the following compositions:
  • SnAg3.4Bi4.8 or SnBi7.5Ag2.0 or SnZn9 or SnZn8Bi3.

Selon un mode particulier de réalisation, la première composition pyrotechnique de l'étage inflammateur pourra être en contact avec l'extrémité d'une fibre optique.According to a particular embodiment, the first pyrotechnic composition of the igniter stage may be in contact with the end of an optical fiber.

L'invention sera mieux comprise à la lecture de la description suivante, description illustrée par les dessins annexés dans lesquels :

  • La figure 1 représente un détonateur en coupe longitudinale avant fusion de la plaque.
  • La figure 2 représente un détonateur en coupe longitudinale après fusion de la plaque.
The invention will be better understood on reading the following description, a description illustrated by the appended drawings in which:
  • The figure 1 represents a detonator in longitudinal section before melting of the plate.
  • The figure 2 represents a detonator in longitudinal section after melting of the plate.

Selon la figure 1, et selon un mode de réalisation, le détonateur 1 comporte un corps 2 sensiblement cylindrique comportant trois parties 2a, 2b et 2c. La partie centrale 2b du corps comporte un filetage externe 2d permettant de solidariser le détonateur avec un montage destiné à le recevoir tel qu'une munition (montage non représenté). Coaxialement au corps 2 une fibre optique 3 gainée traverse la partie arrière 2a du corps. La fibre optique 3 débouche au contact d'une première composition pyrotechnique 4 photosensible formant ici l'étage inflammateur du détonateur. Un tel montage de fibre optique en contact avec la composition pyrotechnique est décrit par le brevet FR2914056 .According to figure 1 , and according to one embodiment, the detonator 1 comprises a substantially cylindrical body 2 having three parts 2a, 2b and 2c. The central portion 2b of the body has an external thread 2d for securing the detonator with a mounting for receiving such a munition (assembly not shown). Coaxially with the body 2 a sheathed optical fiber 3 passes through the rear part 2a of the body. The optical fiber 3 opens in contact with a first pyrotechnic composition 4 photosensitive forming here the igniter stage of the detonator. Such an optical fiber assembly in contact with the pyrotechnic composition is described by the patent FR2914056 .

Comme le précise le brevet FR2914056 , on pourra utiliser comme première composition pyrotechnique 4 une composition associant Zirconium et perchlorate de potassium. Une telle composition est classique et il n'est pas nécessaire de la décrire plus en détails. On pourra utiliser d'autres types de compositions pyrotechniques telles que : Bore / Nitrate de potassium, Bore/Zirconium/Nitrate de potassium .....As stated in the patent FR2914056 it is possible to use as a first pyrotechnic composition 4 a composition combining zirconium and potassium perchlorate. Such a composition is conventional and it is not necessary to describe it in more detail. Other types of pyrotechnic compositions may be used such as: boron / potassium nitrate, boron / zirconium / potassium nitrate .....

On pourra aussi remplacer la première composition pyrotechnique par un explosif secondaire pouvant adopter un régime déflagrant. L'explosif secondaire pourra être pur ou incorporer un dopant optique tel que décrit par le brevet EP1742009 .It will also be possible to replace the first pyrotechnic composition with a secondary explosive that can adopt an explosion-proof regime. The secondary explosive may be pure or incorporate an optical dopant as described by the patent EP1742009 .

D'une façon préférée on associera au niveau de l'étage inflammateur une couche de composition pyrotechnique d'allumage (telle qu'une composition zirconium/Perchlorate de potassium) en contact avec la fibre optique et qui allumera une couche d'un explosif secondaire déflagrant, par exemple de l'octogène. Le brevet EP1306643 décrit une telle association d'une composition d'allumage et d'un explosif secondaire.In a preferred manner, a layer of pyrotechnic ignition composition (such as a zirconium / potassium perchlorate composition) in contact with the optical fiber and which ignites a layer of a secondary explosive will be associated with the ignor stage. explosion, for example octogen. The patent EP1306643 describes such an association of an ignition composition and a secondary explosive.

L'essentiel pour que l'allumage optique soit assuré est que l'étage inflammateur comporte une première composition (et/ou un explosif secondaire déflagrant) ayant une granulométrie parfaitement maîtrisée et relativement réduite (inférieure ou égale à 60 micromètres).The essential for the optical ignition is ensured is that the igniter stage comprises a first composition (and / or a secondary explosive explosion) having a particle size perfectly controlled and relatively reduced (less than or equal to 60 micrometers).

Cette première composition pyrotechnique 4 est chargée dans un étui 5 dont le fond comporte une plaque métallique projetable 6 (aussi appelée élément projeté 6). L'étui 5 comporte une zone annulaire entourant la partie arrière 2a du corps et il est soudé sur cette partie arrière 2a pour assurer l'étanchéité.This first pyrotechnic composition 4 is loaded into a case 5 whose bottom comprises a projectable metal plate 6 (also called projected element 6). The case 5 has an annular area surrounding the rear portion 2a of the body and is welded to the rear portion 2a to seal.

Le vissage de la partie arrière 2a sur la partie centrale 2b permet d'appliquer le fond de l'étui 5 contre la plaque 6 qui est pincée entre l'étui 5 et la partie avant 2c du corps.The screwing of the rear portion 2a on the central portion 2b allows to apply the bottom of the case 5 against the plate 6 which is clamped between the case 5 and the front portion 2c of the body.

L'étui 5 est donc maintenu en position grâce à un filetage 9 solidarisant la partie arrière du corps 2a à la partie centrale du corps 2b. La plaque métallique 6 est en appui par sa périphérie sur un épaulement de la partie avant 2c du corps 2.The case 5 is thus held in position by a thread 9 solidarisant the rear part of the body 2a to the central part of the body 2b. The metal plate 6 is supported by its periphery on a shoulder of the front portion 2c of the body 2.

A une distance D de la plaque métallique projetable 6, dans la partie avant du corps 2c se trouve un explosif secondaire 7 sensible au choc qui forme un étage relais. La distance D sera choisie par l'homme du métier comme étant celle permettant d'obtenir la vitesse de projection optimale au déclenchement par choc de l'explosif secondaire 7 en vertu des caractéristiques de l'étage inflammateur, donc notamment de la nature et de la masse de la première composition 4 et de la masse de la plaque.At a distance D from the projectable metal plate 6, in the front part of the body 2c is a secondary explosive 7 sensitive to shock which forms a relay stage. The distance D will be chosen by the person skilled in the art as being that which makes it possible to obtain the optimal projection speed at the shock release of the secondary explosive 7 by virtue of the characteristics of the igniter stage, and therefore especially of the nature and the mass of the first composition 4 and the mass of the plate.

Le fonctionnement du détonateur est le suivant:

  • Un rayon lumineux est acheminé par la fibre optique 3 jusqu'à la première composition pyrotechnique 4 (étage inflammateur). Celle ci réagit en déflagrant provoquant la projection de la plaque métallique projetable 6 vers l'explosif secondaire 7 (étage relais). Le choc provoque alors la détonation de ce dernier qui entraine la réaction de la suite de la chaine pyrotechnique (non représentée) associée au montage recevant le détonateur.
The operation of the detonator is as follows:
  • A light beam is conveyed by the optical fiber 3 to the first pyrotechnic composition 4 (ignition stage). This one reacts in explosion causing the projected metal plate 6 to project to the secondary explosive 7 (relay stage). The shock then causes the detonation of the latter which causes the reaction of the rest of the pyrotechnic chain (not shown) associated with the assembly receiving the detonator.

Pour assurer sa fonction sécuritaire en cas de forte élévation de température, l'invention propose que la plaque métallique projetable soit en un métal ou alliage de métal dont la température de fusion est inférieure d'au moins 15°C à la température de réaction de l'étage inflammateur, donc ici de la première composition pyrotechnique 4 ou, dans le cas d'un étage inflammateur comportant plusieurs couches, inférieure à la température de réaction de la couche la plus sensible à la température (généralement la couche d'explosif secondaire déflagrant). Compte tenu des compositions pyrotechniques et explosifs secondaires couramment utilisés dans ce type de détonateur qui sont stables thermiquement jusqu'à au moins 230 °C, les exemples d'alliages suivant peuvent être utilisés pour la réalisation de la plaque projetable.To ensure its safety function in case of high temperature rise, the invention proposes that the projectable metal plate is made of a metal or metal alloy whose melting temperature is at least 15 ° C lower than the reaction temperature of the metal. the inflammatory stage, thus here the first pyrotechnic composition 4 or, in the case of an inflammatory stage comprising several layers, less than the reaction temperature of the most temperature-sensitive layer (usually the explosive secondary explosive layer). Given the pyrotechnic compositions and secondary explosives commonly used in this type of detonator which are thermally stable up to at least 230 ° C, the following examples of alloys can be used for producing the projectable plate.

La désignation de ces alliages est faite en citant en premier le symbole chimique de l'élément principal suivi par chaque symbole chimique des autres éléments de l'alliage accompagnés de leur teneur moyenne en pourcentage massique respectif.

  • SnAg3.4Bi4.8 (température de fusion 201-215°C), ce qui signifie un alliage d'étain (Sn) comprenant 3,4% en masse d'Argent (Ag) et 4,8% en masse de Bismuth (Bi).
  • SnBi7.5Ag2.0 (température de fusion 191-216°C), ce qui signifie un alliage d'étain (Sn) comprenant 7,5% en masse de bismuth (Bi) et 2% en masse d'argent (Ag).
  • SnZn9 (température de fusion 199°C), ce qui signifie un alliage d'étain (Sn) comprenant 9% en masse de Zinc (Zn).
  • SnZn8Bi3(température de fusion 191-198°C), ce qui signifie un alliage d'étain (Sn) comprenant 8% en masse de zinc (Zn) et 3% en masse de Bismuth (Bi).
The designation of these alloys is made by first citing the chemical symbol of the main element followed by each chemical symbol of the other elements of the alloy accompanied by their respective average percentage by weight.
  • SnAg3.4Bi4.8 (mp 201-215 ° C), which means a tin alloy (Sn) comprising 3.4% by weight of silver (Ag) and 4.8% by weight of Bismuth ( Bi).
  • SnBi7.5Ag2.0 (melting temperature 191-216 ° C), which means a tin alloy (Sn) comprising 7.5% by weight of bismuth (Bi) and 2% by weight of silver (Ag) .
  • SnZn9 (melting temperature 199 ° C), which means a tin alloy (Sn) comprising 9% by weight Zinc (Zn).
  • SnZn8Bi3 (melting temperature 191-198 ° C), which means a tin alloy (Sn) comprising 8% by weight of zinc (Zn) and 3% by weight of Bismuth (Bi).

L'usage d'alliages de plomb est envisageable également mais n'est pas à favoriser pour des raisons environnementales et normatives.The use of lead alloys is also feasible but is not to be favored for environmental and normative reasons.

La figure 2 montre le détonateur 2 lorsqu'il a été soumis à une température de l'ordre de 215°C, soit environ 15° en dessous de la température de réaction de la première composition pyrotechnique 4.The figure 2 shows the detonator 2 when it has been subjected to a temperature of the order of 215 ° C., ie approximately 15 ° below the reaction temperature of the first pyrotechnic composition 4.

La plaque métallique projetable 6 a fondu à cette température T alors que la première composition 4 est restée stable. Si la température continue d'augmenter jusqu'à la température d'instabilité de la première composition 4, celle ci va réagir mais elle ne pourra plus projeter la plaque 6 ce qui ne provoquera pas la détonation de l'explosif 7. Dans le cas le plus défavorable, l'explosif secondaire 7 pourra déflagrer ce qui ne suffira pas à déclencher la suite de la chaine pyrotechnique.The projectable metal plate 6 has melted at this temperature T while the first composition 4 has remained stable. If the temperature continues to increase up to the instability temperature of the first composition 4, it will react but it will not be able to project the plate 6 which will not cause the detonation of the explosive 7. In the case the most unfavorable, the secondary explosive 7 will be able to deflagrate what will not be enough to trigger the continuation of the pyrotechnic chain.

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

On a ainsi représenté sur la figure 1 la plaque 6 comme pincée entre l'étui 5 et la partie avant 2c du corps 2. Selon un autre mode de réalisation, la plaque 6 pourrait être solidaire de l'étui et former par exemple un paillet de fermeture obturant cet étui. Dans ce cas le rebord externe de l'étui sera serti sur la plaque 6.It has thus been represented on the figure 1 the plate 6 as a pinch between the case 5 and the front portion 2c of the body 2. According to another embodiment, the plate 6 could be secured to the case and form for example a closing flap closing this case. In this case the outer edge of the case will be crimped on the plate 6.

On a également décrit l'invention avec un étage inflammateur initié par une fibre optique. L'invention peut également être mise en oeuvre avec un étage inflammateur initié d'une façon plus classique par l'énergie électrique, par exemple un inflammateur à fil chaud ou à fil explosé.The invention has also been described with an igniter stage initiated by an optical fiber. The invention can also be implemented with an igniter stage initiated in a more conventional manner by the electrical energy, for example a hot-wire or exploded-wire igniter.

Claims (8)

  1. A detonator (1) incorporating a plate (6) projected by an igniter stage comprising at least a first pyrotechnic composition and/or a first explosive (4), on a relay stage comprising at least a secondary explosive (7), detonator (1) characterized in that the projected plate (6) is made of a material that melts at a temperature T that is lower than the instability temperature of the igniter stage.
  2. A detonator (1) with projected plate (6) according to Claim 1, characterized in that the melting temperature T of the plate (6) is lower by at least 15 °C than the instability temperature of the igniter stage (4).
  3. A detonator (1) with projected plate (6) according to one of Claims 1 or 2, characterized in that the plate (6) is formed of a tin-based alloy (Sn).
  4. A detonator (1) with a projected plate (6) according to Claim 3, characterized in that the plate is formed of an alloy having the following composition: SnAg3.4Bi4.8.
  5. A detonator (1) with a projected plate (6) according to Claim 3, characterized in that the plate is formed of an alloy having the following composition: SnBi7.5Ag2.0.
  6. A detonator (1) with a projected plate (6) according to Claim 3, characterized in that the plate is formed of an alloy having the following composition: SnZn9.
  7. A detonator (1 with a projected plate (6) according to Claim 3, characterized in that the plate is formed of an alloy having the following composition: SnZn8Bi3.
  8. A detonator (1) with projected plate (6) according to one of Claims 1 to 7, characterized in that the first pyrotechnic composition of the igniter stage is in contact with the end of an optical fibre.
EP20110290241 2010-05-31 2011-05-25 Secured detonator Active EP2390617B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1002316A FR2960541B1 (en) 2010-05-31 2010-05-31 SECURED DETONATOR

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EP2390617A1 EP2390617A1 (en) 2011-11-30
EP2390617B1 true EP2390617B1 (en) 2013-03-13

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FR (1) FR2960541B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114353600B (en) * 2022-01-17 2024-01-16 中北大学 Spacer type high-safety small-size laser detonation device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3062143A (en) * 1959-11-02 1962-11-06 Armour Res Found Detonator
FR2796142B1 (en) * 1999-07-06 2002-08-09 Saint Louis Inst TWO-STAGE OPTICAL DETONATOR WITH SHOCK-DETONATION TRANSITION
FR2831659B1 (en) * 2001-10-26 2004-04-09 Saint Louis Inst LOW ENERGY OPTICAL DETONATOR
FR2888234B1 (en) * 2005-07-05 2008-05-02 Saint Louis Inst OPTICALLY DOPED ENERGETIC COMPOSITION
FR2914056B1 (en) * 2007-03-21 2010-03-12 Nexter Munitions OPTO PYROTECHNIC INITIATOR

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FR2960541A1 (en) 2011-12-02
FR2960541B1 (en) 2012-05-04
EP2390617A1 (en) 2011-11-30

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