EP2029956A1 - Safety lighter for pyrotechnic device - Google Patents

Safety lighter for pyrotechnic device

Info

Publication number
EP2029956A1
EP2029956A1 EP07786736A EP07786736A EP2029956A1 EP 2029956 A1 EP2029956 A1 EP 2029956A1 EP 07786736 A EP07786736 A EP 07786736A EP 07786736 A EP07786736 A EP 07786736A EP 2029956 A1 EP2029956 A1 EP 2029956A1
Authority
EP
European Patent Office
Prior art keywords
pyrotechnic
igniter
safety
drawer
chamber
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
EP07786736A
Other languages
German (de)
French (fr)
Other versions
EP2029956B1 (en
Inventor
Christophe Riviere
Patrick Cohe
Alain Dousset
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.)
TDA Armements SAS
Original Assignee
TDA Armements SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TDA Armements SAS filed Critical TDA Armements SAS
Publication of EP2029956A1 publication Critical patent/EP2029956A1/en
Application granted granted Critical
Publication of EP2029956B1 publication Critical patent/EP2029956B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F42C15/18—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved
    • F42C15/184—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a slidable carrier
    • 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
    • F42B3/18—Safety initiators resistant to premature firing by static electricity or stray currents

Definitions

  • the present invention relates to a safety igniter to initiate combustion of any type of pyrotechnic device after a determined delay time, such as for example the pyrotechnic engines missiles ignited at a safe distance.
  • the pyrotechnic initiator the first component of the pyrotechnic ignition chain, can be activated by various means such as electrical, mechanical, thermal, optical means. These means provide stimuli most often of low amplitude to activate the initiator. These stimuli, which may be in the normal or accidental environment of the pyrotechnic device, may inadvertently activate the igniter causing the nominal operation of the pyrotechnic device.
  • the main safety criterion is that the pyrotechnic device does not fire unexpectedly. Uncontrolled triggering can result in serious risk to personnel and significant property damage.
  • state-of-the-art igniters whose ignition chain contains sensitive pyrotechnic compositions usually comprise a safety switch, for example a shutter, a slide, a rotor, which separates these sensitive compositions from the ignition circuit. rest of the pyrotechnic chain, and which can be opened during the voluntary operation of the igniter only by the activation of at least one safety device.
  • a safety switch for example a shutter, a slide, a rotor
  • Firing delays are often introduced into the igniters according to parameters related to the use of the pyrotechnic device, for example to ensure a sufficient safety distance from the personnel and the equipment to be protected. These firing delays can easily be obtained and managed by an electronic receiving an activation signal and providing a delayed electrical signal of a predetermined time t depending on the use of the pyrotechnic device. Such electronic devices for generating activation delay require a source of electrical energy and occupy a volume sometimes incompatible with the constraints of space available for certain applications.
  • the invention proposes a safety igniter intended to initiate combustion of a pyrotechnic device, characterized in that it comprises:
  • an igniter body having a cylindrical recess of axis XX '; a pyrotechnic drawer comprising pyrotechnic means for initiating combustion of the pyrotechnic device, the pyrotechnic drawer being able to move in the cylindrical recess of the igniter body of a so-called safety position, ensuring the isolation between the means pyrotechnic drawer and the pyrotechnic device to initiate, to a position, called initiation, intended to cause the ignition of the pyrotechnic device;
  • the pyrotechnic means of the pyrotechnic drawer comprise an igniter, a pyrotechnic delay initiated by the igniter and an intermediate ignition relay initiated by the pyrotechnic delay.
  • the safety igniter includes an output ignition relay initiated by the intermediate ignition relay.
  • a main objective of the invention is to obtain pyrotechnic igniters having a greater safety and reliability of operation.
  • Another objective is to make compact igniters compatible with pyrotechnic devices having little space for the igniter.
  • FIGS. 1, 2 and 3 show an exemplary embodiment of a safety igniter according to the invention. 'invention.
  • the igniter of FIG. 1 comprises a body 10 of the igniter having a cylindrical recess 12 of axis XX ', in which a pyrotechnic drawer 14 can slide.
  • the pyrotechnic drawer 14 can move in the cylindrical recess 12 of the body 10 of the igniter, a so-called safety position Ps, ensuring the isolation between the pyrotechnic means of the igniter and the pyrotechnic device, to a position Pi said initiation, to cause the initiation of combustion of the pyrotechnic device (not shown in the figures).
  • the pyrotechnic drawer 14 comprises a pyrotechnic chamber 20 in the form of a tube closed at one end by a closure wall 22 perpendicular to the axis XX 'having a first hole 24 for the passage of gas between the pyrotechnic chamber 20 and a cell 26 of a cap 28 for closing the pyrotechnic chamber
  • the cell 26 of the cap 28 includes an intermediate ignition relay 30 that can be activated by hot gases from the pyrotechnic chamber 20 through the first hole 24 for the passage of gases.
  • the closure cap 28 has two opposite ends of cylindrical shape, a first end 32 in the form of a tube, of the same diameter D1 as that of the pyrotechnic chamber 20, integral with the end of the pyrotechnic chamber comprising the closure wall 22 and a cylindrical second end 34 of smaller D2 diameter as the first.
  • the connection between the two ends 32, 34 of different diameters D1 and D2 of the cap 28 form at least one shoulder 36 of the cap.
  • the pyrotechnic drawer 14 is closed at its other end opposite the end comprising the cap 28, by a stop 50 in the form of a tube having a first end 52 of the abutment integral with the pyrotechnic chamber 20 and a second end 54 of the stop intended to bear against an element 60 of a safety latch 62 to prevent the pyrotechnic drawer 14 from moving in the body 10 of the igniter, from the safety position Ps to the initiation position Pi.
  • the pyrotechnic chamber 20, in the form of a tube, closed at one end by the closing wall 22 and at the other end by the abutment 50, comprises inside the tube, on the side of the abutment 50, an igniter 70 to electrical control and facing the igniter 70 against the closing wall 22 of the pyrotechnic chamber 20, a pyrotechnic delay 74.
  • the igniter 70 inside the pyrotechnic chamber 20 comprises an active portion 72 facing the pyrotechnic delay 74 and a hermetic feedthrough 76 in contact with the stop 50 hermetically closing the pyrotechnic chamber.
  • the hermetic feedthrough 76 comprises two electrical contacts 80 for bringing an electrical activation current of the igniter 70.
  • the cylindrical recess 12 of the body of the igniter 10 comprises a first cylindrical zone 90 of the same diameter D1 as the diameter of the pyrotechnic chamber 20 allowing the sliding of the pyrotechnic slide in the body 10 of the igniter and a second cylindrical zone. 92 of the same diameter D2 as the diameter of the second end 34 of the cap 28.
  • the two cylindrical regions 90, 92 of the body of the igniter are connected by a shoulder 94 of the body of the igniter.
  • the body 10 of the igniter comprises, at the end of the second cylindrical zone 92, a third hole 96 opening into another cell 97 of the body 10 of the igniter, this other cell 97 being open towards the load of the pyrotechnic device to be initiated. .
  • the igniter comprises a damper 108 in the form of a washer disposed between the cylindrical surface of the abutment 50 and a fixed cylindrical stop 1 10 integral with the body 10 of the igniter along the axis XX '.
  • the damper 108 may be, for example, a spring, an elastomer washer or the like.
  • the other cell 97 of the body 10 of the igniter comprises an ignition relay output 1 10 for initiating the combustion of the load of the pyrotechnic device.
  • the igniter 70, the pyrotechnic delay 74 and the intermediate ignition relay 30 are arranged in a closed volume consisting of the pyrotechnic chamber 20, the hermetic passage 76, the cap 28 and the body of the igniter 10, its sealing is ensured by three O-rings:
  • the element 60 of the safety lock 62 can be fixed by means of control of the lock, or in a closed position Pf preventing the passage of the moving chamber from the safety position Ps to the initiation position Pi, or in a open position Po allowing the passage of the pyrotechnic drawer 14 from the safety position Ps to the initiation position Pi.
  • the safety igniter comprises another means for holding the slide 14 in the safety position Ps consisting of a shear pin 120 secured by one of its ends of the body 10 of the igniter and the other end to the pyrotechnic drawer 14.
  • the pyrotechnic chain is said to be misaligned.
  • the pyrotechnic slide 14 comprising the initiation chain is isolated from the output ignition relay 1 10 and the pyrotechnic device, for example the ignition charge of a thruster, thanks to the O-ring 100.
  • the pyrotechnic drawer 14 is held in the safety position Ps in the body 10 of the igniter by the shear pin 120 and the mechanical element 60 of the safety lock 62 in the closed position Pf.
  • the drawer is in so-called security position Ps.
  • the pyrotechnic drawer can move (or move back) in the body 10 of the igniter under the effect of the combustion gases of the pyrotechnic delay and / or the intermediate ignition relay 30 only to bear on the mechanical element 60 of the safety lock 62.
  • the pyrotechnic chain is still out of alignment, the hot gases gz from the combustion of the initiation chain remain confined in the pyrotechnic drawer 14 and in the areas of the igniter isolated from the pyrotechnic device by the seal 100. No gas hot can not activate the pyrotechnic device to initiate or the output pyrotechnic relay 1 10.
  • an electrical signal activates the igniter 72 which ignites the pyrotechnic delay 74 in the drawer 14.
  • the pyrotechnic delay 74 ignites the intermediate ignition relay 30 by the hot gases passing through the first hole 24 of the pyrotechnic chamber towards the cell 26.
  • the hot gases produced by the combustion of the intermediate ignition relay 30 pass through the second holes 38 of the cap 28 of the pyrotechnic chamber to the body 10 of the igniter pushing back the pyrotechnic drawer 14 in the body 10 of the igniter under the pressure of hot gases gz.
  • the pyrotechnic drawer 14 no longer being impeded in its movement by the mechanical element 60 of the safety latch 62 disengages from the safety position Ps towards the initiation position Pi after having sheared the pin 120 until it comes to rest on the fixed stop 1 10.
  • the damper 108 mitigates the effect of the shock of the pyrotechnic drawer 14 on the fixed stop 1 10 integral with the body 10 of the igniter.
  • the hot gases gz produced by the intermediate ignition relay 30 pass through the gas passage holes 38 to the second cylindrical zone 92 of the igniter body 10 and initiate the output ignition relay 1 10 in the other cell 97 and finally the charge of the pyrotechnic device to be initiated (thruster for example).
  • a main advantage of the invention is to obtain pyrotechnic igniters having greater security and reliability and allowing safe storage.
  • the igniter is mounted in a pyrotechnic device, inadvertent ignition of the pyrotechnic chain does not cause accidental ignition of the load of the pyrotechnic device.
  • the safety igniter according to the invention can be used for many civil or military applications, for example for the ignition of rockets, missile engines, gas generators for tank pressurization, pyromechanisms such as cylinders or pyrotechnic shears.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Lighters Containing Fuel (AREA)
  • Air Bags (AREA)

Abstract

The device concerns a safety lighter designed to initiate a pyrotechnic device into combustion, with the lighter including: a lighter body (10) with a cylindrical groove (12) of XX' axis; a pyrotechnic drawer (14) including pyrotechnic methods (70, 74, 30) to initiate the pyrotechnic device into combustion, with the pyrotechnic drawer (14) being capable of moving into the cylindrical groove, from position (Ps) of security, guaranteeing isolation between the pyrotechnic methods of the drawer and the pyrotechnic device to be initiated into combustion, toward position (Pi), referred to as that of initiation, designed to cause combustion of the pyrotechnic device. Suitable for use with firing rockets, missile motors, gas generators for pressurization of the reservoir, pyromechanisms.

Description

ALLUMEUR DE SECURITE POUR DISPOSITIF PYROTECHNIQUE SAFETY IGNITER FOR PYROTECHNIC DEVICE
La présente invention concerne un allumeur de sécurité pour initier en combustion tout type de dispositif pyrotechnique après un temps de retard déterminé, comme par exemple les moteurs pyrotechniques des missiles allumés à distance de sécurité. L'initiateur pyrotechnique, premier composant de la chaîne pyrotechnique d'allumage, peut être activé par différents moyens tels que des moyens électriques, mécaniques, thermiques, optiques. Ces moyens fournissent des stimulus le plus souvent de faible amplitude pour activer l'initiateur. Ces stimulus, qui peuvent se trouver dans l'environnement normal ou accidentel du dispositif pyrotechnique, peuvent activer intempestivement l'allumeur provoquant le fonctionnement nominal du dispositif pyrotechnique.The present invention relates to a safety igniter to initiate combustion of any type of pyrotechnic device after a determined delay time, such as for example the pyrotechnic engines missiles ignited at a safe distance. The pyrotechnic initiator, the first component of the pyrotechnic ignition chain, can be activated by various means such as electrical, mechanical, thermal, optical means. These means provide stimuli most often of low amplitude to activate the initiator. These stimuli, which may be in the normal or accidental environment of the pyrotechnic device, may inadvertently activate the igniter causing the nominal operation of the pyrotechnic device.
La réglementation concernant la mise à feu des dispositifs d'allumage pyrotechniques, notamment des missiles, ne cesse d'évoluer vers une plus grande sécurité, par exemple par l'application de normes de l'OTAN.Regulations on the firing of pyrotechnic devices, including missiles, are constantly evolving towards greater safety, for example through the application of NATO standards.
Le principal critère de sécurité est que le dispositif pyrotechnique ne se déclenche pas intempestivement. Un déclenchement incontrôlé peut se traduire par des risques sérieux pour le personnel et des dommages matériels significatifs.The main safety criterion is that the pyrotechnic device does not fire unexpectedly. Uncontrolled triggering can result in serious risk to personnel and significant property damage.
Pour éviter les effets des déclenchements intempestifs, les allumeurs de l'état de l'art dont la chaîne d'allumage contient des compositions pyrotechniques sensibles comportent habituellement un interrupteur de sécurité, par exemple volet, glissière, rotor, qui sépare ces compositions sensibles du reste de la chaîne pyrotechnique, et qui ne peut être ouvert lors du fonctionnement volontaire de l'allumeur que par l'activation d'au moins un dispositif de sécurité.In order to avoid the effects of nuisance tripping, state-of-the-art igniters whose ignition chain contains sensitive pyrotechnic compositions usually comprise a safety switch, for example a shutter, a slide, a rotor, which separates these sensitive compositions from the ignition circuit. rest of the pyrotechnic chain, and which can be opened during the voluntary operation of the igniter only by the activation of at least one safety device.
Des retards de mise à feu sont souvent introduits dans les allumeurs en fonction de paramètres liés à l'utilisation du dispositif pyrotechnique, par exemple pour assurer une distance de sécurité suffisante par rapport aux personnels et aux matériels à protéger. Ces retards de mise à feu peuvent facilement être obtenus et gérés par une électronique recevant un signal d'activation et fournissant un signal électrique retardé d'un temps t prédéterminé en fonction de l'utilisation du dispositif pyrotechnique. De tels dispositifs électroniques de génération de retard d'activation nécessitent une source d'énergie électrique et occupent un volume parfois incompatible avec les contraintes d'encombrement disponible pour certaines applications.Firing delays are often introduced into the igniters according to parameters related to the use of the pyrotechnic device, for example to ensure a sufficient safety distance from the personnel and the equipment to be protected. These firing delays can easily be obtained and managed by an electronic receiving an activation signal and providing a delayed electrical signal of a predetermined time t depending on the use of the pyrotechnic device. Such electronic devices for generating activation delay require a source of electrical energy and occupy a volume sometimes incompatible with the constraints of space available for certain applications.
Afin de palier les inconvénients des allumeurs de l'état de l'art, l'invention propose un allumeur de sécurité destiné à initier en combustion un dispositif pyrotechnique, caractérisé en ce qu'il comporte :In order to overcome the drawbacks of state-of-the-art igniters, the invention proposes a safety igniter intended to initiate combustion of a pyrotechnic device, characterized in that it comprises:
- un corps d'allumeur ayant un évidement cylindrique d'axe XX' ; - un tiroir pyrotechnique comportant des moyens pyrotechniques d'initiation en combustion du dispositif pyrotechnique, le tiroir pyrotechnique pouvant se déplacer dans l'évidement cylindrique du corps de l'allumeur d'une position, dite de sécurité, assurant l'isolement entre les moyens pyrotechniques du tiroir et le dispositif pyrotechnique à initier, vers une position, dite d'initiation, destinée à provoquer l'allumage du dispositif pyrotechnique ;an igniter body having a cylindrical recess of axis XX '; a pyrotechnic drawer comprising pyrotechnic means for initiating combustion of the pyrotechnic device, the pyrotechnic drawer being able to move in the cylindrical recess of the igniter body of a so-called safety position, ensuring the isolation between the means pyrotechnic drawer and the pyrotechnic device to initiate, to a position, called initiation, intended to cause the ignition of the pyrotechnic device;
- des moyens d'étanchéité entre le tiroir pyrotechnique et le corps d'allumeur pour isoler, en position de sécurité, le tiroir pyrotechnique du dispositif pyrotechnique à initier ; - des moyens mécaniques de maintien du tiroir pyrotechnique en position de sécurité.sealing means between the pyrotechnic slide and the igniter body for isolating, in the safety position, the pyrotechnic slide of the pyrotechnic device to be initiated; - Mechanical means for holding the pyrotechnic drawer in the safety position.
Avantageusement, les moyens pyrotechniques du tiroir pyrotechnique comportent un inflammateur, un retard pyrotechnique initié par l'inflammateur et un relais d'allumage intermédiaire initié par le retard pyrotechnique.Advantageously, the pyrotechnic means of the pyrotechnic drawer comprise an igniter, a pyrotechnic delay initiated by the igniter and an intermediate ignition relay initiated by the pyrotechnic delay.
Dans une autre réalisation, l'allumeur de sécurité comporte un relais d'allumage de sortie initié par le relais d'allumage intermédiaire. Un principal objectif de l'invention est d'obtenir des allumeurs pyrotechniques ayant une plus grande sécurité et fiabilité de fonctionnement.In another embodiment, the safety igniter includes an output ignition relay initiated by the intermediate ignition relay. A main objective of the invention is to obtain pyrotechnic igniters having a greater safety and reliability of operation.
Un autre objectif est de réaliser des allumeurs compacts compatibles avec des dispositifs pyrotechniques ne disposant que de peu de place pour l'allumeur.Another objective is to make compact igniters compatible with pyrotechnic devices having little space for the igniter.
Un autre objectif est de diminuer les coûts de tels allumeurs pyrotechniques en réduisant le nombre de composants nécessaires à son fonctionnement. L'invention sera mieux comprise à l'aide d'exemples de réalisation de l'allumeur selon l'invention en référence aux dessins indexés dans lesquels les figures 1 , 2 et 3 représentent un exemple de réalisation d'un allumeur de sécurité selon l'invention.Another objective is to reduce the costs of such pyrotechnic igniters by reducing the number of components necessary for its operation. The invention will be better understood with the aid of embodiments of the igniter according to the invention with reference to the indexed drawings in which FIGS. 1, 2 and 3 show an exemplary embodiment of a safety igniter according to the invention. 'invention.
L'allumeur de la figure 1 comporte un corps 10 de l'allumeur ayant un évidement cylindrique 12 d'axe XX', dans lequel peut coulisser un tiroir pyrotechnique 14.The igniter of FIG. 1 comprises a body 10 of the igniter having a cylindrical recess 12 of axis XX ', in which a pyrotechnic drawer 14 can slide.
Le tiroir pyrotechnique 14 peut se déplacer dans l'évidement cylindrique 12 du corps 10 de l'allumeur, d'une position dite de sécurité Ps, assurant l'isolement entre les moyens pyrotechniques de l'allumeur et le dispositif pyrotechnique, vers une position Pi dite d'initiation, pour provoquer l'initiation en combustion du dispositif pyrotechnique (non représenté sur les figures).The pyrotechnic drawer 14 can move in the cylindrical recess 12 of the body 10 of the igniter, a so-called safety position Ps, ensuring the isolation between the pyrotechnic means of the igniter and the pyrotechnic device, to a position Pi said initiation, to cause the initiation of combustion of the pyrotechnic device (not shown in the figures).
Le tiroir pyrotechnique 14 comporte une chambre pyrotechnique 20 en forme de tube fermé à une des extrémités par une paroi de fermeture 22 perpendiculaire à l'axe XX' comportant un premier trou 24 de passage des gaz entre la chambre pyrotechnique 20 et une alvéole 26 d'un capuchon 28 de fermeture de la chambre pyrotechniqueThe pyrotechnic drawer 14 comprises a pyrotechnic chamber 20 in the form of a tube closed at one end by a closure wall 22 perpendicular to the axis XX 'having a first hole 24 for the passage of gas between the pyrotechnic chamber 20 and a cell 26 of a cap 28 for closing the pyrotechnic chamber
20. L'alvéole 26 du capuchon 28 comporte un relais d'allumage intermédiaire 30 pouvant être activé par des gaz chauds provenant de la chambre pyrotechnique 20 par le premier trou 24 de passage des gaz.20. The cell 26 of the cap 28 includes an intermediate ignition relay 30 that can be activated by hot gases from the pyrotechnic chamber 20 through the first hole 24 for the passage of gases.
Le capuchon 28 de fermeture comporte deux extrémités opposées de forme cylindrique, une première extrémité 32 en forme de tube, de même diamètre D1 que celui de la chambre pyrotechnique 20, solidaire de l'extrémité de la chambre pyrotechnique comportant la paroi de fermeture 22 et une seconde extrémité cylindrique 34 de plus petit diamètre D2 que la première. Le raccordement entre les deux extrémités 32, 34 de différents diamètres D1 et D2 du capuchon 28 forment au moins un épaulement 36 du capuchon.The closure cap 28 has two opposite ends of cylindrical shape, a first end 32 in the form of a tube, of the same diameter D1 as that of the pyrotechnic chamber 20, integral with the end of the pyrotechnic chamber comprising the closure wall 22 and a cylindrical second end 34 of smaller D2 diameter as the first. The connection between the two ends 32, 34 of different diameters D1 and D2 of the cap 28 form at least one shoulder 36 of the cap.
Des deuxièmes trous 38 de passage des gaz traversent les parois cylindriques du capuchon 28 débouchant d'une part dans l'alvéoleSecond holes 38 through which the gases pass through the cylindrical walls of the cap 28 opening on the one hand into the cell
26 du capuchon et d'autre part au niveau de l'épaulement 36 du capuchon.26 of the cap and secondly at the shoulder 36 of the cap.
Le tiroir pyrotechnique 14 est fermé à son autre extrémité opposée à l'extrémité comportant le capuchon 28, par une butée 50 en forme de tube comportant une première extrémité 52 de la butée solidaire de la chambre pyrotechnique 20 et une seconde extrémité 54 de la butée destinée à venir en appui sur un élément 60 d'un verrou de sécurité 62 pour empêcher le déplacement du tiroir pyrotechnique 14 dans le corps 10 de l'allumeur, de la position de sécurité Ps vers la position d'initiation Pi.The pyrotechnic drawer 14 is closed at its other end opposite the end comprising the cap 28, by a stop 50 in the form of a tube having a first end 52 of the abutment integral with the pyrotechnic chamber 20 and a second end 54 of the stop intended to bear against an element 60 of a safety latch 62 to prevent the pyrotechnic drawer 14 from moving in the body 10 of the igniter, from the safety position Ps to the initiation position Pi.
La chambre pyrotechnique 20, en forme de tube, fermée à une extrémité par la paroi de fermeture 22 et à l'autre extrémité par la butée 50, comporte à l'intérieur du tube, du côte de la butée 50, un inflammateur 70 à commande électrique et face à l'inflammateur 70, contre la paroi de fermeture 22 de la chambre pyrotechnique 20, un retard pyrotechnique 74.The pyrotechnic chamber 20, in the form of a tube, closed at one end by the closing wall 22 and at the other end by the abutment 50, comprises inside the tube, on the side of the abutment 50, an igniter 70 to electrical control and facing the igniter 70 against the closing wall 22 of the pyrotechnic chamber 20, a pyrotechnic delay 74.
L'inflammateur 70, à l'intérieur de la chambre pyrotechnique 20 comporte une partie active 72 face au retard pyrotechnique 74 et une traversée hermétique 76 en contact avec la butée 50 fermant hermétiquement la chambre pyrotechnique. La traversée hermétique 76 comporte deux contacts électriques 80 pour amener un courant électrique d'activation de l'inflammateur 70.The igniter 70, inside the pyrotechnic chamber 20 comprises an active portion 72 facing the pyrotechnic delay 74 and a hermetic feedthrough 76 in contact with the stop 50 hermetically closing the pyrotechnic chamber. The hermetic feedthrough 76 comprises two electrical contacts 80 for bringing an electrical activation current of the igniter 70.
L'évidement cylindrique 12 du corps de l'allumeur 10 comporte une première zone cylindrique 90 de même diamètre D1 que le diamètre de la chambre pyrotechnique 20 permettant le coulissement du tiroir pyrotechnique dans le corps 10 de l'allumeur et, une deuxième zone cylindrique 92 de même diamètre D2 que le diamètre de la seconde extrémité 34 du capuchon 28. Les deux zones cylindriques 90, 92 du corps de l'allumeur sont raccordées par un épaulement 94 du corps de l'allumeur. Le corps 10 de l'allumeur comporte, au bout de la deuxième zone cylindrique 92, un troisième trou 96 débouchant dans une autre alvéole 97 du corps 10 de l'allumeur, cette autre alvéole 97 étant ouverte vers la charge du dispositif pyrotechnique à initier. L'allumeur comporte un amortisseur 108 en forme de rondelle disposé entre la surface cylindrique de la butée 50 et une butée cylindrique fixe 1 10 solidaire du corps 10 de l'allumeur selon l'axe XX'. L'amortisseur 108 peut être par exemple un ressort, une rondelle en élastomère, ou autre. Dans une variante de l'allumeur de sécurité, l'autre alvéole 97 du corps 10 de l'allumeur comporte un relais d'allumage de sortie 1 10 destiné à initier la combustion de la charge du dispositif pyrotechnique.The cylindrical recess 12 of the body of the igniter 10 comprises a first cylindrical zone 90 of the same diameter D1 as the diameter of the pyrotechnic chamber 20 allowing the sliding of the pyrotechnic slide in the body 10 of the igniter and a second cylindrical zone. 92 of the same diameter D2 as the diameter of the second end 34 of the cap 28. The two cylindrical regions 90, 92 of the body of the igniter are connected by a shoulder 94 of the body of the igniter. The body 10 of the igniter comprises, at the end of the second cylindrical zone 92, a third hole 96 opening into another cell 97 of the body 10 of the igniter, this other cell 97 being open towards the load of the pyrotechnic device to be initiated. . The igniter comprises a damper 108 in the form of a washer disposed between the cylindrical surface of the abutment 50 and a fixed cylindrical stop 1 10 integral with the body 10 of the igniter along the axis XX '. The damper 108 may be, for example, a spring, an elastomer washer or the like. In a variant of the safety igniter, the other cell 97 of the body 10 of the igniter comprises an ignition relay output 1 10 for initiating the combustion of the load of the pyrotechnic device.
L'inflammateur 70, le retard pyrotechnique 74 et le relais d'allumage intermédiaire 30 sont disposés dans un volume fermé constitué par la chambre pyrotechnique 20, la traversée hermétique 76, le capuchon 28 et le corps de l'allumeur 10, son étanchéité est assurée par trois joints toriques :The igniter 70, the pyrotechnic delay 74 and the intermediate ignition relay 30 are arranged in a closed volume consisting of the pyrotechnic chamber 20, the hermetic passage 76, the cap 28 and the body of the igniter 10, its sealing is ensured by three O-rings:
- un premier joint torique 100 dans une rainure circulaire 102 autour de la seconde extrémité cylindrique 34 de diamètre D2 du capuchon 28 en contact avec le corps 10 de l'allumeur ;- A first O-ring 100 in a circular groove 102 around the second cylindrical end 34 of diameter D2 of the cap 28 in contact with the body 10 of the igniter;
- un deuxième joint torique 104 dans une rainure circulaire 106 autour de la chambre pyrotechnique 20 en contact avec le corps 10 de l'allumeur ;a second O-ring 104 in a circular groove 106 around the pyrotechnic chamber 20 in contact with the body 10 of the igniter;
- un troisième joint torique 105 dans une rainure circulaire 107 autour de la traversée hermétique 76.a third O-ring 105 in a circular groove 107 around the hermetic feedthrough 76.
L'élément 60 du verrou de sécurité 62 peut être fixé par des moyens de commande du verrou, soit dans une position fermée Pf empêchant le passage de la chambre mobile de la position de sécurité Ps vers la position d'initiation Pi, soit dans une position ouverte Po permettant le passage du tiroir pyrotechnique 14 de la position de sécurité Ps vers la position d'initiation Pi.The element 60 of the safety lock 62 can be fixed by means of control of the lock, or in a closed position Pf preventing the passage of the moving chamber from the safety position Ps to the initiation position Pi, or in a open position Po allowing the passage of the pyrotechnic drawer 14 from the safety position Ps to the initiation position Pi.
L'allumeur de sécurité comporte un autre moyen de maintien du tiroir 14 en position de sécurité Ps consistant en une goupille cisaillable 120 solidaire par une des ses extrémités du corps 10 de l'allumeur et par l'autre extrémité au tiroir pyrotechnique 14.The safety igniter comprises another means for holding the slide 14 in the safety position Ps consisting of a shear pin 120 secured by one of its ends of the body 10 of the igniter and the other end to the pyrotechnic drawer 14.
Nous allons par la suite expliquer le fonctionnement de l'allumeur à l'aide des figures 1 à 3 dans différentes configurations.We will then explain the operation of the igniter with the help of Figures 1 to 3 in different configurations.
- Configuration de stockage, représentée à la figure 1 (ou en position dite de sécurité).- Storage configuration, shown in Figure 1 (or so-called security position).
Dans cette configuration de sécurité, la chaîne pyrotechnique est dite désalignée. Le tiroir pyrotechnique 14 comportant la chaîne d'initiation est isolé du relais d'allumage de sortie 1 10 et du dispositif pyrotechnique, par exemple la charge d'allumage d'un propulseur, grâce au joint torique 100.In this security configuration, the pyrotechnic chain is said to be misaligned. The pyrotechnic slide 14 comprising the initiation chain is isolated from the output ignition relay 1 10 and the pyrotechnic device, for example the ignition charge of a thruster, thanks to the O-ring 100.
Le tiroir pyrotechnique 14 est maintenu en position de sécurité Ps dans le corps 10 de l'allumeur par la goupille cisaillable 120 et l'élément mécanique 60 du verrou de sécurité 62 en position fermée Pf.The pyrotechnic drawer 14 is held in the safety position Ps in the body 10 of the igniter by the shear pin 120 and the mechanical element 60 of the safety lock 62 in the closed position Pf.
- Configuration allumage intempestif représenté à la figure 2. Le tiroir est en positon dite de sécurité Ps. En cas d'initiation intempestive de l'inflammateur 72, du retard pyrotechnique 74 ou du relais d'allumage intermédiaire 30 de la chaîne pyrotechnique d'initiation, le tiroir pyrotechnique ne peut se déplacer (ou reculer) dans le corps 10 de l'allumeur sous l'effet des gaz de combustion du retard pyrotechnique et/ou du relais d'allumage intermédiaire 30 que pour venir en appui sur l'élément mécanique 60 du verrou de sécurité 62.- Configuration inadvertent ignition shown in Figure 2. The drawer is in so-called security position Ps. In case of inadvertent initiation of the igniter 72, the pyrotechnic delay 74 or the intermediate ignition relay 30 of the pyrotechnic chain of initiation, the pyrotechnic drawer can move (or move back) in the body 10 of the igniter under the effect of the combustion gases of the pyrotechnic delay and / or the intermediate ignition relay 30 only to bear on the mechanical element 60 of the safety lock 62.
La chaîne pyrotechnique est toujours désalignée, les gaz chauds gz issus de la combustion de la chaîne d'initiation restent confinés dans le tiroir pyrotechnique 14 et dans les zones de l'allumeur isolées du dispositif pyrotechnique par le joint d'étanchéité 100. Aucun gaz chaud ne peut activer le dispositif pyrotechnique à initier ou le relais pyrotechnique de sortie 1 10.The pyrotechnic chain is still out of alignment, the hot gases gz from the combustion of the initiation chain remain confined in the pyrotechnic drawer 14 and in the areas of the igniter isolated from the pyrotechnic device by the seal 100. No gas hot can not activate the pyrotechnic device to initiate or the output pyrotechnic relay 1 10.
- Configuration allumage normal (intentionnel) représenté à la figure 3. Lorsque dispositif de commande du verrou de sécurité 62 détecte le ou les événements spécifiques qui autorisent l'allumage du dispositif pyrotechnique par exemple un propulseur, il débloque et efface le verrou de sécurité 62 qui assure la sécurité de l'allumeur. L'élément mécanique 60 du verrou passe de la position fermée Pf à la position ouverte Po.- Normal (intentional) ignition configuration shown in Figure 3. When the security lock control device 62 detects the specific event or events that allow the pyrotechnic device, for example a thruster, to be ignited, it unlocks and clears the security lock 62 which ensures the safety of the igniter. The mechanical element 60 of the lock moves from the closed position Pf to the open position Po.
Simultanément, un signal électrique active l'inflammateur 72 qui allume le retard pyrotechnique 74 dans le tiroir 14.Simultaneously, an electrical signal activates the igniter 72 which ignites the pyrotechnic delay 74 in the drawer 14.
A l'issue de sa combustion, après un temps t prédéterminé, le retard pyrotechnique 74 allume le relais d'allumage intermédiaire 30 par les gaz chauds passant par le premier trou 24 de la chambre pyrotechnique vers l'alvéole 26.At the end of its combustion, after a predetermined time t, the pyrotechnic delay 74 ignites the intermediate ignition relay 30 by the hot gases passing through the first hole 24 of the pyrotechnic chamber towards the cell 26.
Les gaz chauds produits par la combustion du relais d'allumage intermédiaire 30 passent par les deuxièmes trous 38 du capuchon 28 de la chambre pyrotechnique vers le corps 10 de l'allumeur faisant reculer le tiroir pyrotechnique 14 dans le corps 10 de l'allumeur sous la pression des gaz chauds gz.The hot gases produced by the combustion of the intermediate ignition relay 30 pass through the second holes 38 of the cap 28 of the pyrotechnic chamber to the body 10 of the igniter pushing back the pyrotechnic drawer 14 in the body 10 of the igniter under the pressure of hot gases gz.
Le tiroir pyrotechnique 14 n'étant plus entravé dans son mouvement par l'élément mécanique 60 du verrou de sécurité 62 se dégage de la position de sécurité Ps vers la position d'initiation Pi après avoir cisaillé la goupille 120 jusqu'à venir en appui sur la butée fixe 1 10. L'amortisseur 108 permet d'atténuer l'effet du choc du tiroir pyrotechnique 14 sur la butée fixe 1 10 solidaire du corps 10 de l'allumeur.The pyrotechnic drawer 14 no longer being impeded in its movement by the mechanical element 60 of the safety latch 62 disengages from the safety position Ps towards the initiation position Pi after having sheared the pin 120 until it comes to rest on the fixed stop 1 10. The damper 108 mitigates the effect of the shock of the pyrotechnic drawer 14 on the fixed stop 1 10 integral with the body 10 of the igniter.
Les gaz chauds gz produits par relais d'allumage intermédiaire 30 traversent les trous de passage des gaz 38 vers la deuxième zone cylindrique 92 du corps 10 de l'allumeur et initient le relais d'allumage de sortie 1 10 dans l'autre alvéole 97 et finalement la charge du dispositif pyrotechnique à initier (propulseur par exemple).The hot gases gz produced by the intermediate ignition relay 30 pass through the gas passage holes 38 to the second cylindrical zone 92 of the igniter body 10 and initiate the output ignition relay 1 10 in the other cell 97 and finally the charge of the pyrotechnic device to be initiated (thruster for example).
Un principal avantage de l'invention est d'obtenir des allumeurs pyrotechniques ayant une plus grande sécurité et fiabilité et permettant un stockage sans risques. Dans le cas où l'allumeur est monté dans un dispositf pyrotechnique, l'allumage intempestif de la chaîne pyrotechnique ne provoque pas l'allumage accidentel de la charge du dispositif pyrotechnique. L'allumeur de sécurité selon l'invention peut être utilisé pour de nombreuses applications civiles ou militaires, comme par exemple pour l'allumage de roquettes, de moteurs de missiles, de générateurs de gaz pour la pressurisation de réservoir, de pyromécanismes comme les vérins ou les cisailles pyrotechniques. A main advantage of the invention is to obtain pyrotechnic igniters having greater security and reliability and allowing safe storage. In the case where the igniter is mounted in a pyrotechnic device, inadvertent ignition of the pyrotechnic chain does not cause accidental ignition of the load of the pyrotechnic device. The safety igniter according to the invention can be used for many civil or military applications, for example for the ignition of rockets, missile engines, gas generators for tank pressurization, pyromechanisms such as cylinders or pyrotechnic shears.

Claims

REVENDICATIONS
1 . Allumeur de sécurité destiné à initier en combustion un dispositif pyrotechnique, caractérisé en ce qu'il comporte : - un corps (10) d'allumeur ayant un évidement cylindrique (12) d'axe XX' ;1. Safety igniter for initiating combustion of a pyrotechnic device, characterized in that it comprises: an igniter body (10) having a cylindrical recess (12) of axis XX ';
- un tiroir pyrotechnique (14) comportant des moyens pyrotechniques (70, 74, 30) d'initiation en combustion du dispositif pyrotechnique, le tiroir pyrotechnique (14) pouvant se déplacer dans l'évidement cylindrique (12) du corps (10) de l'allumeur d'une positiona pyrotechnic drawer (14) comprising pyrotechnic pyrotechnic means (70, 74, 30) for the combustion initiation of the pyrotechnic device, the pyrotechnic drawer (14) being able to move in the cylindrical recess (12) of the body (10) of the igniter of a position
(Ps), dite de sécurité, assurant l'isolement entre les moyens pyrotechniques du tiroir et le dispositif pyrotechnique à initier, vers une position (Pi), dite d'initiation, destinée à provoquer la combustion du dispositif pyrotechnique ; - des moyens d'étanchéité (100) entre le tiroir pyrotechnique(Ps), said security, ensuring the isolation between the pyrotechnic means of the drawer and the pyrotechnic device to initiate, to a position (Pi), called initiation, intended to cause the combustion of the pyrotechnic device; sealing means (100) between the pyrotechnic drawer
(14) et le corps (10) d'allumeur pour isoler, en position de sécurité (Ps), le tiroir pyrotechnique du dispositif pyrotechnique à initier ;(14) and the igniter body (10) for insulating, in the safety position (Ps), the pyrotechnic drawer of the pyrotechnic device to be initiated;
- des moyens mécaniques (60, 62, 120) de maintien du tiroir pyrotechnique (14) en position de sécurité (Ps).- Mechanical means (60, 62, 120) for holding the pyrotechnic drawer (14) in the safety position (Ps).
2. Allumeur de sécurité selon la revendication 1 , caractérisé en ce que les moyens pyrotechniques du tiroir pyrotechnique (14) comportent un inflammateur (70), un retard pyrotechnique (74) initié par l'inflammateur (70) et un relais d'allumage intermédiaire (30) initié par le retard pyrotechnique (74).2. Safety igniter according to claim 1, characterized in that the pyrotechnic means of the pyrotechnic drawer (14) comprise an igniter (70), a pyrotechnic delay (74) initiated by the igniter (70) and an ignition relay intermediate (30) initiated by the pyrotechnic delay (74).
3. Allumeur de sécurité selon la revendication 2, caractérisé en ce qu'il comporte un relais d'allumage de sortie (1 10) initié par le relais d'allumage intermédiaire (30). 3. Safety igniter according to claim 2, characterized in that it comprises an output ignition relay (1 10) initiated by the intermediate ignition relay (30).
4. Allumeur de sécurité selon l'une des revendications 1 à 3, caractérisé en ce que le tiroir pyrotechnique (14) comporte une chambre pyrotechnique (20) en forme de tube fermé à une des extrémités par une paroi de fermeture (22) perpendiculaire à l'axe XX' comportant un premier trou (24) de passage des gaz entre la chambre pyrotechnique4. Safety igniter according to one of claims 1 to 3, characterized in that the pyrotechnic slide (14) comprises a pyrotechnic chamber (20) in the form of a tube closed at one end by a closing wall (22) perpendicular to the axis XX 'having a first hole (24) for the passage of gases between the pyrotechnic chamber
(20) et une alvéole (26) d'un capuchon (28) de fermeture de la chambre pyrotechnique (20).(20) and a cell (26) of a cap (28) for closing the pyrotechnic chamber (20).
5. Allumeur de sécurité selon la revendication 4, caractérisé en ce que l'alvéole (26) du capuchon (28) comporte un relais d'allumage intermédiaire (30) pouvant être activé par des gaz chauds provenant de la chambre pyrotechnique (20) par le premier trou (24) de passage des gaz.5. Safety igniter according to claim 4, characterized in that the cell (26) of the cap (28) comprises an intermediate ignition relay (30) can be activated by hot gases from the pyrotechnic chamber (20) by the first hole (24) for the passage of gases.
6. Allumeur de sécurité selon l'une des revendications 4 ou 5, caractérisé en ce que le capuchon (28) de fermeture comporte deux extrémités opposées de forme cylindrique, une première extrémité (32) en forme de tube, de même diamètre D1 que celui de la chambre pyrotechnique (20), solidaire de l'extrémité de la chambre pyrotechnique, comportant la paroi de fermeture (22) et une seconde extrémité cylindrique (34) de plus petit diamètre D2 que la première (32), le raccordement entre les deux extrémités (32, 34) de différents diamètres D1 et D2 du capuchon (28) formant au moins un épaulement (36) du capuchon et en ce que des deuxièmes trous (38) de passage des gaz traversent les parois cylindriques du capuchon (28) débouchant d'une part dans l'alvéole (26) du capuchon et d'autre part au niveau de l'épaulement (36) du capuchon.6. Safety igniter according to one of claims 4 or 5, characterized in that the closure cap (28) comprises two opposite ends of cylindrical shape, a first end (32) in the form of a tube, of the same diameter D1 as that of the pyrotechnic chamber (20), integral with the end of the pyrotechnic chamber, comprising the closure wall (22) and a second cylindrical end (34) of smaller diameter D2 than the first (32), the connection between the two ends (32, 34) of different diameters D1 and D2 of the cap (28) forming at least one shoulder (36) of the cap and in that second holes (38) through which the gases pass through the cylindrical walls of the cap ( 28) opening on the one hand into the cavity (26) of the cap and on the other hand at the shoulder (36) of the cap.
7. Allumeur de sécurité selon l'une des revendications 4 à 6, caractérisé en ce que le tiroir pyrotechnique (14) est fermé à son autre extrémité opposée à l'extrémité comportant le capuchon (28), par une butée (50) en forme de tube comportant une première extrémité (52) de la butée solidaire de la chambre pyrotechnique (20) et une seconde extrémité (54) de la butée destinée à venir en appui sur un élément (60) d'un verrou de sécurité (62) pour empêcher le déplacement du tiroir pyrotechnique (14) dans le corps (10) de l'allumeur, de la position de sécurité (Ps) vers la position d'initiation (Pi).7. Safety igniter according to one of claims 4 to 6, characterized in that the pyrotechnic slide (14) is closed at its other end opposite the end comprising the cap (28), by a stop (50) in tube shape having a first end (52) of the abutment integral with the pyrotechnic chamber (20) and a second end (54) of the abutment intended to bear on a member (60) of a safety lock (62). ) to prevent the drawer from moving pyrotechnic (14) in the body (10) of the igniter, from the safety position (Ps) to the initiation position (Pi).
8. Allumeur de sécurité selon la revendication 7, caractérisé en ce que la chambre pyrotechnique (20), en forme de tube fermé à une extrémité par la paroi de fermeture (22) et à l'autre extrémité par la butée (50), comporte à l'intérieur du tube, du côte de la butée (50) un inflammateur (70) à commande électrique et face à lïnflammateur, contre la paroi de fermeture (22) de la chambre, un retard pyrotechnique (74).8. Safety igniter according to claim 7, characterized in that the pyrotechnic chamber (20), in the form of a tube closed at one end by the closure wall (22) and at the other end by the stop (50), comprises, inside the tube, on the side of the abutment (50) an igniter (70) electrically controlled and facing the igniter, against the closure wall (22) of the chamber, a pyrotechnic delay (74).
9. Allumeur de sécurité selon la revendication 8, caractérisé en ce que lïnflammateur (70), à l'intérieur de la chambre pyrotechnique (20) comporte une partie active (72) face au retard pyrotechnique (74) et une traversée hermétique (76) en contact avec la butée (50) fermant hermétiquement la chambre pyrotechnique (20), la traversée hermétique9. Safety igniter according to claim 8, characterized in that the igniter (70), inside the pyrotechnic chamber (20) comprises an active part (72) facing the pyrotechnic delay (74) and a hermetic passage (76). ) in contact with the stop (50) hermetically closing the pyrotechnic chamber (20), the hermetic passage
(76) comportant deux contacts électriques (80) pour amener un courant électrique d'activation de lïnflammateur (70).Device (76) having two electrical contacts (80) for supplying an electric activation current of the igniter (70).
10. Allumeur de sécurité selon l'une des revendications 4 à 9, caractérisé en ce que l'évidement cylindrique (12) du corps (10) de l'allumeur comporte une première zone cylindrique (90) de même diamètre D1 que le diamètre de la chambre pyrotechnique (20) permettant le coulissement du tiroir pyrotechnique dans le corps de l'allumeur et, une deuxième zone cylindrique (92) de même diamètre D2 que le diamètre de la seconde extrémité (34) du capuchon (28), les deux zones cylindriques (90, 92) du corps (10) de l'allumeur étant raccordées par un épaulement (94) du corps de l'allumeur.10. Safety igniter according to one of claims 4 to 9, characterized in that the cylindrical recess (12) of the body (10) of the igniter comprises a first cylindrical zone (90) of the same diameter D1 as the diameter the pyrotechnic chamber (20) for sliding the pyrotechnic slide in the body of the igniter and a second cylindrical zone (92) of the same diameter D2 as the diameter of the second end (34) of the cap (28), the two cylindrical regions (90, 92) of the igniter body (10) being connected by a shoulder (94) of the igniter body.
1 1 . Allumeur de sécurité selon l'une des revendications 8 ou 10, caractérisé en ce que le corps (10) de l'allumeur comporte, au bout de la deuxième zone cylindrique (92), un troisième trou (96) débouchant dans une autre alvéole (97) du corps (10) de l'allumeur, cette autre alvéole (97) étant ouverte vers la charge du dispositif pyrotechnique à initier. 1 1. Safety igniter according to one of claims 8 or 10, characterized in that the body (10) of the igniter comprises, at the end of the second cylindrical zone (92), a third hole (96) opening into another cell (97) of the body (10) of the igniter, this other cell (97) being open to the load of the pyrotechnic device to be initiated.
12. Allumeur de sécurité selon l'une des revendications 7 à 1 1 , caractérisé en ce qu'il comporte un amortisseur (108) en forme de rondelle disposé entre la surface cylindrique de la butée (50) et une butée cylindrique fixe (1 10) solidaire du corps (10) de l'allumeur selon l'axe XX', l'amortisseur (108) pouvant être, par exemple, un ressort, une rondelle en élastomère, ou autre.12. Safety igniter according to one of claims 7 to 1 1, characterized in that it comprises a washer-shaped damper (108) disposed between the cylindrical surface of the abutment (50) and a fixed cylindrical stop (1). 10) integral with the body (10) of the igniter along the axis XX ', the damper (108) may be, for example, a spring, an elastomer washer, or other.
13. Allumeur de sécurité selon l'une des revendications 9 à 12, caractérisé en ce que l'inflammateur (70), le retard pyrotechnique (74) et le relais d'allumage intermédiaire (30) étant disposés dans un volume fermé constitué par la chambre pyrotechnique (20), la traversée hermétique (76), le capuchon (28) et le corps de l'allumeur (10), son étanchéité est assurée par trois joints toriques :13. Safety igniter according to one of claims 9 to 12, characterized in that the igniter (70), the pyrotechnic delay (74) and the intermediate ignition relay (30) being arranged in a closed volume constituted by the pyrotechnic chamber (20), the hermetic passage (76), the cap (28) and the igniter body (10), its sealing is ensured by three O-rings:
- un premier joint torique (100) dans une rainure circulaire (102) autour de la seconde extrémité cylindrique (34) de diamètre D2 du capuchon (28) en contact avec le corps (10) de l'allumeur ;- a first O-ring (100) in a circular groove (102) around the second cylindrical end (34) of diameter D2 of the cap (28) in contact with the body (10) of the igniter;
- un deuxième joint torique (104) dans une rainure circulaire (106) autour de la chambre pyrotechnique (20) en contact avec le corps (10) de l'allumeur ; - un troisième joint torique (105) dans une rainure circulaire (107) autour de la traversée hermétique (76).- a second O-ring (104) in a circular groove (106) around the pyrotechnic chamber (20) in contact with the igniter body (10); - a third O-ring (105) in a circular groove (107) around the hermetic seal (76).
14. Allumeur de sécurité selon l'une des revendications 1 à 13, caractérisé en ce que les moyens de maintien du tiroir pyrotechnique en position de sécurité (Ps) comportent une goupille cisaillable (120) solidaire par une des ses extrémités du corps (10) de l'allumeur et par l'autre extrémité au tiroir pyrotechnique (14).14. Safety igniter according to one of claims 1 to 13, characterized in that the holding means of the pyrotechnic drawer in the safety position (Ps) comprise a shearable pin (120) integral with one of its ends of the body (10). ) of the igniter and the other end to the pyrotechnic drawer (14).
15. Allumeur de sécurité selon l'une des revendications 1 1 à 14, caractérisé en ce que l'autre alvéole (97) du corps (10) de l'allumeur comporte un relais d'allumage de sortie (1 10) destiné à initier la combustion de la charge du dispositif pyrotechnique. 15. Safety igniter according to one of claims 1 1 to 14, characterized in that the other cell (97) of the body (10) of the igniter comprises an output ignition relay (1 10) for initiate the combustion of the charge of the pyrotechnic device.
EP07786736A 2006-06-16 2007-06-14 Safety initiator for pyrotechnic device Expired - Fee Related EP2029956B1 (en)

Applications Claiming Priority (2)

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FR0604816A FR2902512B1 (en) 2006-06-16 2006-06-16 SAFETY IGNITER FOR PYROTECHNIC DEVICE
PCT/EP2007/055876 WO2007144396A1 (en) 2006-06-16 2007-06-14 Safety lighter for pyrotechnic device

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EP2029956A1 true EP2029956A1 (en) 2009-03-04
EP2029956B1 EP2029956B1 (en) 2011-07-27

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CA (1) CA2655625C (en)
ES (1) ES2368517T3 (en)
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NO (1) NO338578B1 (en)
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JP5624920B2 (en) * 2011-03-18 2014-11-12 横河電子機器株式会社 Safety device
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NO20090245L (en) 2009-03-05
ES2368517T3 (en) 2011-11-18
CA2655625A1 (en) 2007-12-21
EP2029956B1 (en) 2011-07-27
IL195950A (en) 2013-09-30
US8122829B2 (en) 2012-02-28
ZA200900261B (en) 2009-12-30
CA2655625C (en) 2015-03-31
IL195950A0 (en) 2009-09-01
NO338578B1 (en) 2016-09-12
FR2902512A1 (en) 2007-12-21
FR2902512B1 (en) 2010-02-19
WO2007144396A1 (en) 2007-12-21
US20090320709A1 (en) 2009-12-31

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