EP1079200B9 - Pyrotechnic device for connection and delay - Google Patents

Pyrotechnic device for connection and delay Download PDF

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Publication number
EP1079200B9
EP1079200B9 EP00410101A EP00410101A EP1079200B9 EP 1079200 B9 EP1079200 B9 EP 1079200B9 EP 00410101 A EP00410101 A EP 00410101A EP 00410101 A EP00410101 A EP 00410101A EP 1079200 B9 EP1079200 B9 EP 1079200B9
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EP
European Patent Office
Prior art keywords
cylinder
pyrotechnic device
parts
track
internal
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EP00410101A
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German (de)
French (fr)
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EP1079200A1 (en
EP1079200B1 (en
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Francesco Ambrico
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/04—Arrangements for ignition
    • F42D1/06—Relative timing of multiple charges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B4/00—Fireworks, i.e. pyrotechnic devices for amusement, display, illumination or signal purposes
    • F42B4/24—Fireworks, i.e. pyrotechnic devices for amusement, display, illumination or signal purposes characterised by having plural successively-ignited charges

Definitions

  • the present invention relates to the field of pyrotechnics.
  • the delay devices are of various types. he for example, slow wicks or Bickford cords. However, more generally, delays consisting of powder packed in a cardboard cylinder as it is currently the cheapest device.
  • the links between igniter, wicks and delay devices are provided by sheaths of kraft paper and ligatures, such sheaths and ligatures being then possibly themselves ligated or nailed on wooden bars, for example the housing in which are arranged several mortars.
  • the realization of such editing is long and tedious. So, in general, we proceed to assemble the various elements in advance, in workshop. In addition, such montages are not very accessible to a unprofessional user.
  • the delay devices above also present the disadvantage of not allowing to realize any delay time. It is generally admitted that, with common powders, the length of the cardboard cylinder sets the length of the delay which is of the order of one second per centimeter. In practice, he is difficult to obtain relatively precise delays from a duration less than 2 seconds or greater than 5 to 6 seconds. Otherwise, it is necessary to pass to slow loops of type cords Bickford which are significantly more expensive.
  • delay systems produce strong flames on one side of the cylinder when the delay starts to ignite and on both sides when the flame reaches the other end of the delay. These strong flames are likely to ignite wicks or delay devices located at proximity. This requires taking extra precautions and further complicates editing.
  • an object of the present invention is to provide a connection and delay system between wicks or between igniter and wick (s) which is particularly simple to put into and which allows to reach delays of durations chosen, for example ranging from zero duration to durations of the order of a minute or more.
  • Another object of the present invention is to provide such a system for selecting a delay of a duration chosen from several predetermined durations.
  • the present invention provides a pyrotechnic device for connection and delay between wicks and / or between igniter and wicks, comprising a cavity divided into two parts whose inner walls are coated a highly flammable material; means for blocking one or several wicks in each of the parts; and means of communication between the two parties.
  • Figure 1A is a sectional view of a first embodiment of embodiment of the present invention consisting of a cylinder hollow 1 whose inner walls 2 are coated with a material highly flammable, preferably a burning powdery product very easily inside a cavity. This product is for example glued black powder.
  • a means 3 of maintaining a wick At each end of the cylinder 1 is mounted a means 3 of maintaining a wick.
  • this holding means is represented in the form of a cap.
  • the cylinder 1 is made of plastic as well as caps 3.
  • Figure 1B shows an end view of an example of cap.
  • the flat part of the cap is for example a sheet of thin plastic material and elastic cut in star for forming tabs whose tip is substantially intersection of the sheet and the axis of the cylinder. So, when a wick is pushed into the cylinder, elemental tabs deform and bend inwards, opposing withdrawal of the wick.
  • FIG. 1C represents the device of FIG. 1A also in a sectional view, in the case of wicks 4 and 5 are respectively inserted in the left part 6 and in the straight part 7 of the cylinder.
  • the locks can be more or less sunken and go or not to join.
  • FIG. 1D illustrates a variant embodiment of wick holding means 3 according to the present invention.
  • This medium takes the form of a flange 8 provided with teeth turned inward and fixed at a point 9 at one end of the tube 1.
  • the free ends of the collar are provided with means complementary fasteners 10, for example by clipping, for tighten the collar against a bit and the walls of the tube.
  • This embodiment makes it possible to better adapt to wicks relatively hard and large diameter.
  • the device according to the first embodiment of the present invention allows the connection between two wicks.
  • the wick 4 Once the wick 4 has been lit, it transmits flames inside the cylinder that can ignite directly the end of the opposite wick 5.
  • the wick 4 causes extremely rapid ignition of the powder disposed on the internal walls 2 and the flame created by this powder causes the ignition of the second wick 5 if a conflagration direct did not occur.
  • the cylinders 1 and their caps 3 can be sized so that we can introduce to each end one or more wicks. We can also to penetrate on one side a wick and on the other side an igniter electric power supply, or to turn a wick and a igniter and on the other side one or more wicks to be able to propagate the flame communicated by the igniter simultaneously to several locks.
  • FIG. 2 represents a sectional view of a second embodiment of the present invention providing a connection function between wicks with a non-zero delay.
  • the device according to the second embodiment of the present invention comprises two cylindrical parts 11 and 12 recessed one in the other.
  • the inner cavity of the inner cylinder 11 is divided into two parts 13 and 14 by a partition 15.
  • the inner walls of each of the two parts 13 and 14 are, as in the case of the first embodiment of the present invention, covered with a highly flammable material 2.
  • the outer wall of the inner cylinder 11 is provided with a grooving, for example thread-like helical, forming a track 16 which communicates through a first end with an orifice 17 in the wall of the left part 13 of the internal cavity of the cylinder 11 and by a second end with an orifice 18 in the wall of the right part 14 of the internal cavity of the cylinder 11.
  • the track 16 formed between the openings 17 and 18 is filled with a material allowing, when it is lit at one end, to propagate the flame towards the other end at a substantially linear velocity constant. This will be for example black powder packed or a specific bead such as a thin slow wick made by Bickford society.
  • end caps 3 allow insertion and blocking of bits 4 and 5 in each of the cavity portions 13 and 14.
  • this flame ignites the powder disposed on the walls of this part 13.
  • the flame propagates in powder disposed in the orifice 17 and the along runway 16, reaches orifice 18, ignites the powder disposed on the walls of the straight portion 14 of the cavity, and triggers the ignition of the wick 5.
  • FIG. 3 represents a variant embodiment of the device of Figure 2, constituting a third mode of embodiment of the present invention.
  • the device comprises an inner cylinder 21 and an outer cylinder 22.
  • the cavity internal is divided into two parts 23 and 24 by a partition 25.
  • a short rectilinear track 26 extends between orifices 27 and 28 through the walls of the cavity portions 23 and 24.
  • FIG. 3 A system for holding / locking the locks different from that of Figures 1 and 2 is also illustrated in Figure 3.
  • the outer tube 22 overflows on both sides of the inner tube 21 and has in the overflow portion an annular groove 29 for receiving a disk 30 for locking a wick.
  • This disc may have in view end, a look similar to that of Figures 1 and 2. It may also be chosen that the Figure 3 shows larger slots between the elementary tabs, and that the central part is cut. We can also choose a disc made of a material flexible metal.
  • the holding system can be consisting of integral molded plastic tongues ends of the inner cylinder.
  • FIG. 4 represents a fourth embodiment of the present invention.
  • the left part of the figure includes a device similar to that of Figure 2 in which the same elements have been designated by the same references.
  • the part right 14 of the cavity to the right of the partition 15 is extends by dividing into several cylinders 31 to 34, including each is intended to receive a wick 35 to 38.
  • Figures 5A and 5B show in side view and in front view a fifth embodiment of the present invention.
  • the left part of the device of Figure 5A is similar to Figure 4.
  • the device instead of dividing into several cylinders, flares in a fan 41, its extreme face including a system 42 of lock anti-withdrawal of several wicks that can be inserted in parallel.
  • the present invention provides a device for particularly simple, reliable, adjustable and safe delay. Moreover, this device can be of relatively low cost, be manufactured in large series in plastic ...
  • Fig. 6 shows a sixth embodiment of the present invention in which the same pyrotechnic device may, at the option of the user, perform one of several predetermined delays.
  • This device comprises an inner tube 50, a tube intermediate 60 and an outer tube 70.
  • the inner tube 50 like the tube 1 of FIG. tube 11 of Figure 2 or the tube 21 of Figure 3 has its walls internally coated with a highly flammable material 2.
  • This tube 50 is divided into two parts by an internal partition 51. It includes through openings 52 and 53 on both sides of the partition.
  • the intermediate tube 60 is a tube on the surface outer of which are formed several tracks 61, 62, 63, longitudinal in the example shown, whose ends comprise openings 61-1, 61-2, 62-1, 62-2 and 63-1, 63-2. These openings cross the tube 60.
  • the device comprises an outer tube 70 of protection.
  • the outer tube 70 is fixedly mounted relative to the tube intermediate 60 which can rotate relative to the inner tube 50.
  • Various means may be provided so that, after assembly, the inner tube can rotate relative to the intermediate tube while being held axially.
  • the ignition is transmitted with a delay determined by runway 61 to opening 61-2.
  • the inner tube relative to the intermediate tube can select one of the delays 62 or 63 or another delay not shown disposed on the non-visible face of the intermediate cylinder.
  • a first marker 54 is formed on the outer edge of the inner tube, which for example is slightly longer than the intermediate tube, to facilitate its grip and its rotation.
  • the intermediate tube is provided with second markers, preferably at both ends, respectively 61-0, 62-0 and 63-0.
  • a track 65 extends between the ends of the tracks 61, 62, 63 on the opposite side to the side where ignition normally occurs. So once a track has been lit and played its effect of delay, the ignition propagates towards the other tracks and the powder they contain is burned, which prevents the device, once used, may present any danger.
  • Figure 7 shows a variant of the sixth mode of embodiment of the present invention.
  • the openings of the intermediate tube can be those shown in Figure 6. It can also be the openings of a helical track 71 shown in FIG. embodiment, it will be necessary to provide a number of identical references 59 on the side of the inner tube and 72 on the side of the outer tube.
  • the markers will have to be identified. Preferably they will be identified by the same colors or the same indications.
  • this tube could be replaced by a varnish or soaking the intermediate cylinder part in a material substance plastic capable of polymerizing.
  • This sixth embodiment of the present invention may appear more complex than the described embodiments previously.
  • the cost of manufacturing such a device will be weaker than the others because it could be manufactured in very large series, the same device that can be used to achieve different delays.
  • it will not arise again, for the user, the problem of having to store ranges of delay devices.
  • the present invention is capable of various variations and modifications that will appear to the man from art.
  • the various embodiments described can be combined; for example the multirate systems of Figures 4 and 5 can to be adapted to the first embodiment of the invention.

Abstract

The connector consists of a tube (12) with an inner cylinder (11) which has its cavity divided into two sections (13, 14) by a middle partition (15) and lined with a highly inflammable material (2). Two fuses (4, 5) are inserted into the cavities and held in place by end caps (3), while the inner cylinder's outer surface has a spiral groove (16) containing a slow-burning material, such as a compacted powder. The groove is connected to the two inner cavities by a hole (17, 18) at each end.

Description

La présente invention concerne le domaine de la pyrotechnie.The present invention relates to the field of pyrotechnics.

Quand on veut déclencher un feu d'artifice, on cherche à minimiser le nombre d'allumages de pièces pyrotechniques individuelles, telles que des fusées, des fontaines lumineuses, des bougies, etc. Ainsi, les diverses pièces pyrotechniques, par exemple des fusées placées dans des mortiers, sont connectées en grappes, c'est-à-dire que la mèche rapide de chaque pièce est reliée à une autre mèche directement ou par l'intermédiaire d'un retard pyrotechnique, lui-même lié à une autre mèche, à un autre retard, etc., jusqu'à un point auquel on relie un allumeur électrique. Il serait peut-être plus simple de relier directement chaque mèche de chaque pièce pyrotechnique à un allumeur spécifique et, par un circuit électronique, de commander l'instant d'allumage de chaque élément. Néanmoins, en pratique, ceci s'avère beaucoup trop cher et l'on préfère utiliser le système traditionnel à mèches et retards pyrotechniques.When we want to start a fireworks, we search to minimize the number of ignitions of pyrotechnics individual, such as rockets, fountains, candles, etc. Thus, the various pyrotechnic example of rockets placed in mortars, are connected in clusters, that is to say that the quick wick of each piece is connected to another wick directly or through a pyrotechnic delay, itself linked to another wick, to another delay, etc., to a point where an igniter is connected electric. It might be easier to connect directly each strand of each pyrotechnic piece to a specific igniter and, by an electronic circuit, to control the moment ignition of each element. Nevertheless, in practice, this is much too expensive and we prefer to use the system traditional wicks and pyrotechnic delays.

Les dispositifs de retard sont de divers types. Il s'agira par exemple de mèches lentes ou cordons Bickford. Toutefois, plus généralement, on utilise des retards constitués de poudre tassée dans un cylindre de carton car c'est actuellement le dispositif le moins cher. Couramment, les liaisons entre allumeur, mèches et dispositifs de retard sont assurées par des gaines de papier kraft et des ligatures, ces gaines et ces ligatures étant ensuite éventuellement elles-mêmes ligaturées ou clouées sur des barrettes en bois, par exemple le boítier dans lequel sont disposés plusieurs mortiers. La réalisation d'un tel montage est longue et fastidieuse. Ainsi, de façon générale, on procède à l'assemblage des divers éléments à l'avance, en atelier. En outre, de tels montages sont peu accessibles à un utilisateur non professionnel.The delay devices are of various types. he for example, slow wicks or Bickford cords. However, more generally, delays consisting of powder packed in a cardboard cylinder as it is currently the cheapest device. Commonly, the links between igniter, wicks and delay devices are provided by sheaths of kraft paper and ligatures, such sheaths and ligatures being then possibly themselves ligated or nailed on wooden bars, for example the housing in which are arranged several mortars. The realization of such editing is long and tedious. So, in general, we proceed to assemble the various elements in advance, in workshop. In addition, such montages are not very accessible to a unprofessional user.

Les dispositifs de retard ci-dessus présentent aussi l'inconvénient de ne pas permettre de réaliser n'importe quelle durée de retard. On admet généralement que, avec les poudres courantes, la longueur du cylindre en carton fixe la durée du retard qui est de l'ordre d'une seconde par centimètre. En pratique, il est difficile d'obtenir des retards relativement précis d'une durée inférieure à 2 secondes ou supérieure à 5 à 6 secondes. Sinon, il faut passer à des mèches lentes de type cordons Bickford qui sont nettement plus coûteuses.The delay devices above also present the disadvantage of not allowing to realize any delay time. It is generally admitted that, with common powders, the length of the cardboard cylinder sets the length of the delay which is of the order of one second per centimeter. In practice, he is difficult to obtain relatively precise delays from a duration less than 2 seconds or greater than 5 to 6 seconds. Otherwise, it is necessary to pass to slow loops of type cords Bickford which are significantly more expensive.

De plus, les assemblages à papier kraft sont sujets à de mauvais fonctionnements en cas de fortes pluies. Il faut alors protéger les divers dispositifs de retard et les divers montages : voir à cet effet le document FR-A-353200.In addition, kraft paper assemblies are subject to malfunctions in case of heavy rains. It is then necessary protect the various delay devices and the various assemblies: see document FR-A-353200.

En outre, les systèmes de retard produisent de fortes flammes d'un côté du cylindre quand le retard commence à s'enflammer et des deux côtés quand la flamme arrive à l'autre extrémité du retard. Ces fortes flammes sont susceptibles d'enflammer des mèches ou des dispositifs de retard situés à proximité. Cela impose de prendre des précautions supplémentaires et complique encore le montage.In addition, delay systems produce strong flames on one side of the cylinder when the delay starts to ignite and on both sides when the flame reaches the other end of the delay. These strong flames are likely to ignite wicks or delay devices located at proximity. This requires taking extra precautions and further complicates editing.

Ainsi, un objet de la présente invention est de prévoir un système de connexion et de retard entre mèches ou entre allumeur et mèche(s) qui soit particulièrement simple à mettre en oeuvre et qui permette d'atteindre des retards de durées choisies, par exemple allant d'une durée nulle à des durées de l'ordre d'une minute ou plus. Thus, an object of the present invention is to provide a connection and delay system between wicks or between igniter and wick (s) which is particularly simple to put into and which allows to reach delays of durations chosen, for example ranging from zero duration to durations of the order of a minute or more.

un autre objet de la présente invention est de prévoir un tel système permettant de sélectionner un retard d'une durée choisie parmi plusieurs durées prédéterminées.another object of the present invention is to provide such a system for selecting a delay of a duration chosen from several predetermined durations.

Pour atteindre ces objets, la présente invention prévoit un dispositif pyrotechnique de connexion et de retard entre mèches et/ou entre allumeur et mèches, comprenant une cavité divisée en deux parties dont les parois internes sont revêtues d'un matériau très inflammable ; des moyens de blocage d'une ou plusieurs mèches dans chacune des parties ; et des moyens de communication entre les deux parties.To achieve these objects, the present invention provides a pyrotechnic device for connection and delay between wicks and / or between igniter and wicks, comprising a cavity divided into two parts whose inner walls are coated a highly flammable material; means for blocking one or several wicks in each of the parts; and means of communication between the two parties.

Des modes de réalisation particuliers de la présente invention sont indiqués dans les revendications dépendantes.Particular embodiments of the present invention are indicated in the dependent claims.

Ces objets, caractéristiques et avantages, ainsi que d'autres de la présente invention seront exposés en détail dans la description suivante de modes de réalisation particuliers faite à titre non-limitatif en relation avec les figures jointes parmi lesquelles :

  • la figure 1A est une vue en coupe d'un premier mode de réalisation de la présente invention ;
  • la figure 1B est une vue en bout d'un exemple de capuchon du dispositif de la figure 1A ;
  • la figure 1C représente le dispositif de la figure 1A dans lequel sont insérées des mèches ;
  • la figure 1D est une vue en perspective représentant une variante d'un capuchon de blocage selon la présente invention ;
  • la figure 2 est une vue en coupe schématique d'un deuxième mode de réalisation de la présente invention ;
  • la figure 3 est une vue en coupe schématique d'un troisième mode de réalisation de la présente invention ;
  • la figure 4 est une vue en coupe schématique, partiellement en coupe, d'un quatrième mode de réalisation de la présente invention ;
  • la figure 5A est une vue de côté d'un cinquième mode de réalisation de la présente invention ;
  • la figure 5B est une vue en bout du cinquième mode de réalisation de la présente invention ;
  • la figure 6 est une vue de côté de trois tubes constituant un sixième mode de réalisation de la présente invention ; et
  • la figure 7 est une vue de côté de deux tubes constituant une variante du sixième mode de réalisation de la présente invention.
    • These and other objects, features, and advantages of the present invention will be set forth in detail in the following description of particular embodiments given as a non-limiting example in connection with the accompanying drawings in which:
  • Fig. 1A is a sectional view of a first embodiment of the present invention;
  • Figure 1B is an end view of an exemplary cap of the device of Figure 1A;
  • FIG. 1C represents the device of FIG. 1A in which wicks are inserted;
  • Figure 1D is a perspective view showing a variant of a locking cap according to the present invention;
  • Figure 2 is a schematic sectional view of a second embodiment of the present invention;
  • Fig. 3 is a schematic sectional view of a third embodiment of the present invention;
  • Figure 4 is a schematic sectional view, partly in section, of a fourth embodiment of the present invention;
  • Fig. 5A is a side view of a fifth embodiment of the present invention;
  • Fig. 5B is an end view of the fifth embodiment of the present invention;
  • Figure 6 is a side view of three tubes constituting a sixth embodiment of the present invention; and
  • Figure 7 is a side view of two alternative tubes of the sixth embodiment of the present invention.

    • La figure 1A est une vue en coupe d'un premier mode de réalisation de la présente invention constitué d'un cylindre creux 1 dont les parois internes 2 sont revêtues d'un matériau très inflammable, de préférence un produit pulvérulent s'enflammant très facilement à l'intérieur d'une cavité. Ce produit est par exemple de la poudre noire collée.Figure 1A is a sectional view of a first embodiment of embodiment of the present invention consisting of a cylinder hollow 1 whose inner walls 2 are coated with a material highly flammable, preferably a burning powdery product very easily inside a cavity. This product is for example glued black powder.

    A chacune des extrémités du cylindre 1 est monté un moyen 3 de maintien d'une mèche. Dans le mode de réalisation de la figure 1A, ce moyen de maintien est représenté sous forme d'un capuchon. De préférence, le cylindre 1 est en matière plastique de même que les capuchons 3.At each end of the cylinder 1 is mounted a means 3 of maintaining a wick. In the embodiment of FIG. 1A, this holding means is represented in the form of a cap. Preferably, the cylinder 1 is made of plastic as well as caps 3.

    La figure 1B représente une vue en bout d'un exemple de capuchon. La partie plane du capuchon est par exemple une feuille de matière plastique mince et élastique découpée en étoile pour former des languettes dont la pointe est sensiblement au point d'intersection de la feuille et de l'axe du cylindre. Ainsi, quand une mèche est enfoncée vers l'intérieur du cylindre, les languettes élémentaires se déforment et se courbent vers l'intérieur, s'opposant à un retrait de la mèche.Figure 1B shows an end view of an example of cap. The flat part of the cap is for example a sheet of thin plastic material and elastic cut in star for forming tabs whose tip is substantially intersection of the sheet and the axis of the cylinder. So, when a wick is pushed into the cylinder, elemental tabs deform and bend inwards, opposing withdrawal of the wick.

    La figure 1C représente le dispositif de la figure 1A également dans une vue en coupe, dans le cas où des mèches 4 et 5 sont respectivement insérées dans la partie gauche 6 et dans la partie droite 7 du cylindre. Les mèches peuvent être plus ou moins enfoncées et aller ou non jusqu'à se rejoindre. On a représenté les languettes des capuchons 3 déformées vers l'intérieur et l'on conçoit bien que ceci s'oppose à un arrachement des mèches en exerçant une force raisonnable. Bien entendu, il sera toujours possible, en utilisant un outil de déblocage ou en tirant suffisamment fort, d'arracher les mèches si cela est nécessaire.FIG. 1C represents the device of FIG. 1A also in a sectional view, in the case of wicks 4 and 5 are respectively inserted in the left part 6 and in the straight part 7 of the cylinder. The locks can be more or less sunken and go or not to join. We have shown the tabs of the hoods 3 deformed inwards and it is well understood that this is opposed to tearing wicks by exercising reasonable force. Of course, he will be always possible, using a deblocking tool or pulling hard enough, tear off the wicks if this is necessary.

    La figure 1D illustre une variante de réalisation du moyen de maintien de mèche 3 selon la présente invention. Ce moyen prend la forme d'une collerette 8 munie de dents tournées vers l'intérieur et fixée en un point 9 à une extrémité du tube 1. Les extrémités libres de la collerette sont munies de moyens de fixation complémentaires 10, par exemple par enclipsage, pour serrer la collerette contre une mèche et les parois du tube. Ce mode de réalisation permet de mieux s'adapter à des mèches relativement dures et de gros diamètre.FIG. 1D illustrates a variant embodiment of wick holding means 3 according to the present invention. This medium takes the form of a flange 8 provided with teeth turned inward and fixed at a point 9 at one end of the tube 1. The free ends of the collar are provided with means complementary fasteners 10, for example by clipping, for tighten the collar against a bit and the walls of the tube. This embodiment makes it possible to better adapt to wicks relatively hard and large diameter.

    Le dispositif selon le premier mode de réalisation de la présente invention permet la liaison entre deux mèches. Par exemple, une fois que la mèche 4 a été allumée, elle transmet des flammes à l'intérieur du cylindre qui peuvent enflammer directement l'extrémité de la mèche opposée 5. En outre, la mèche 4 provoque l'allumage extrêmement rapide de la poudre disposée sur les parois internes 2 et la flamme créée par cette poudre provoque l'allumage de la deuxième mèche 5 si un embrasement direct ne s'est pas produit.The device according to the first embodiment of the present invention allows the connection between two wicks. By example, once the wick 4 has been lit, it transmits flames inside the cylinder that can ignite directly the end of the opposite wick 5. In addition, the wick 4 causes extremely rapid ignition of the powder disposed on the internal walls 2 and the flame created by this powder causes the ignition of the second wick 5 if a conflagration direct did not occur.

    On notera que les cylindres 1 et leurs capuchons 3 peuvent être dimensionnés pour que l'on puisse introduire à chaque extrémité une ou plusieurs mèches. On pourra également faire pénétrer d'un côté une mèche et de l'autre côté un allumeur électrique ou encore faire rentrer d'un côté une mèche et un allumeur et de l'autre côté une ou plusieurs mèches pour pouvoir propager la flamme communiquée par l'allumeur simultanément à plusieurs mèches.It will be noted that the cylinders 1 and their caps 3 can be sized so that we can introduce to each end one or more wicks. We can also to penetrate on one side a wick and on the other side an igniter electric power supply, or to turn a wick and a igniter and on the other side one or more wicks to be able to propagate the flame communicated by the igniter simultaneously to several locks.

    La figure 2 représente une vue en coupe d'un deuxième mode de réalisation de la présente invention assurant une fonction de connexion entre mèches avec un retard non nul. Le dispositif selon le deuxième mode de réalisation de la présente invention comprend deux pièces cylindriques 11 et 12 encastrées l'une dans l'autre. La cavité interne du cylindre intérieur 11 est divisée en deux parties 13 et 14 par une cloison 15. Les parois internes de chacune des deux parties 13 et 14 sont, comme dans le cas du premier mode de réalisation de la présente invention, revêtues d'un matériau très inflammable 2. La paroi externe du cylindre interne 11 est munie d'un rainurage, par exemple hélicoïdal analogue à un filetage, formant une piste 16 qui communique par une première extrémité avec un orifice 17 dans la paroi de la partie gauche 13 de la cavité interne du cylindre 11 et par une seconde extrémité avec un orifice 18 dans la paroi de la partie droite 14 de la cavité interne du cylindre 11. La piste 16 formée entre les orifices 17 et 18 est remplie d'un matériau permettant, quand il est allumé à une extrémité, de propager la flamme vers l'autre extrémité, à une vitesse linéaire sensiblement constante. Il s'agira par exemple de poudre noire tassée ou d'un cordon spécifique tel qu'une mèche lente fine fabriquée par la société Bickford.FIG. 2 represents a sectional view of a second embodiment of the present invention providing a connection function between wicks with a non-zero delay. The device according to the second embodiment of the present invention comprises two cylindrical parts 11 and 12 recessed one in the other. The inner cavity of the inner cylinder 11 is divided into two parts 13 and 14 by a partition 15. The inner walls of each of the two parts 13 and 14 are, as in the case of the first embodiment of the present invention, covered with a highly flammable material 2. The outer wall of the inner cylinder 11 is provided with a grooving, for example thread-like helical, forming a track 16 which communicates through a first end with an orifice 17 in the wall of the left part 13 of the internal cavity of the cylinder 11 and by a second end with an orifice 18 in the wall of the right part 14 of the internal cavity of the cylinder 11. The track 16 formed between the openings 17 and 18 is filled with a material allowing, when it is lit at one end, to propagate the flame towards the other end at a substantially linear velocity constant. This will be for example black powder packed or a specific bead such as a thin slow wick made by Bickford society.

    Comme dans le cas du premier mode de réalisation, des capuchons d'extrémité 3 permettent l'insertion et le blocage de mèches 4 et 5 dans chacune des parties de cavité 13 et 14. Ainsi, quand la mèche 4, ou un allumeur remplaçant la mèche 4, amène une flamme à se créer dans la partie gauche 13, cette flamme allume la poudre disposée sur les parois de cette partie 13. La flamme se propage dans de la poudre disposée dans l'orifice 17 et le long de la piste 16, arrive à l'orifice 18, enflamme la poudre disposée sur les parois de la partie droite 14 de la cavité, et déclenche l'allumage de la mèche 5.As in the case of the first embodiment, end caps 3 allow insertion and blocking of bits 4 and 5 in each of the cavity portions 13 and 14. Thus, when the wick 4, or an igniter replacing the wick 4, brings a flame to be created in the left side 13, this flame ignites the powder disposed on the walls of this part 13. The flame propagates in powder disposed in the orifice 17 and the along runway 16, reaches orifice 18, ignites the powder disposed on the walls of the straight portion 14 of the cavity, and triggers the ignition of the wick 5.

    Le dispositif illustré en figure 2 présente de nombreux avantages par rapport à un retard pyrotechnique classique :

  • simplicité d'utilisation : il permet l'insertion facile de mèches 4 et 5 ; plusieurs retards peuvent simplement être montés en série ;
  • fiabilité : il est pratiquement insensible à l'humidité ou à une forte pluie ;
  • plage de réglage étendue : les durées de retard peuvent être choisies dans une très large plage de valeurs ; on peut atteindre en choisissant un pas extrêmement serré de la piste 15 des retards pouvant atteindre ou dépasser la minute ;
  • sécurité : l'allumage se propageant d'une partie à l'autre du dispositif par une piste protégée par le cylindre extérieur 17, il ne se produit pas de jet de flamme vers l'extérieur et le dispositif ne risque pas d'enflammer des dispositifs voisins ni de brûler un opérateur ;
  • retards multiples : comme on le verra ci-après, un dispositif selon l'invention peut permettre de sélectionner un retard parmi plusieurs retards prédéterminés.
    • The device illustrated in FIG. 2 has many advantages over a conventional pyrotechnic delay:
  • simplicity of use : it allows the easy insertion of locks 4 and 5; several delays can simply be connected in series;
  • reliability : it is virtually insensitive to moisture or heavy rain;
  • extended setting range : Delay times can be selected from a very wide range of values; it can be reached by choosing an extremely tight pace of the track 15 delays that can reach or exceed the minute;
  • safety : the ignition propagating from one part to another of the device by a track protected by the outer cylinder 17, it does not occur flame jet to the outside and the device is not likely to ignite neighboring devices or burn an operator;
  • multiple delays : as will be seen below, a device according to the invention may allow to select a delay among several predetermined delays.

    • La figure 3 représente une variante de réalisation du dispositif de la figure 2, constituant un troisième mode de réalisation de la présente invention. En figure 3, le dispositif comprend un cylindre interne 21 et un cylindre externe 22. La cavité interne est divisée en deux parties 23 et 24 par une cloison 25. Une piste rectiligne courte 26 s'étend entre des orifices 27 et 28 traversant les parois des parties de cavité 23 et 24.FIG. 3 represents a variant embodiment of the device of Figure 2, constituting a third mode of embodiment of the present invention. In Figure 3, the device comprises an inner cylinder 21 and an outer cylinder 22. The cavity internal is divided into two parts 23 and 24 by a partition 25. A short rectilinear track 26 extends between orifices 27 and 28 through the walls of the cavity portions 23 and 24.

    Dans le mode de réalisation de la figure 3, si l'on veut encore raccourcir le retard entre la partie gauche et la partie droite du cylindre 21, on peut ouvrir la cloison 25. On arrive alors à une structure très similaire à celle du premier mode de réalisation de l'invention.In the embodiment of Figure 3, if one still wants to shorten the delay between the left part and the right part of the cylinder 21, the partition 25 can be opened. then comes to a structure very similar to that of the first embodiment of the invention.

    Un système de maintien/blocage des mèches différent de celui des figures 1 et 2 est également illustré en figure 3. Cette variante pourrait être utilisée dans les autres modes de réalisation de la présente invention. Comme le montre la figure 3, le tube externe 22 déborde de part et d'autre du tube interne 21 et comporte dans la partie en débordement une rainure annulaire 29 destinée à recevoir un disque 30 de blocage d'une mèche. Ce disque pourra avoir en vue en bout, une allure similaire à celle des figures 1 et 2. On pourra également choisir que le dispositif de la figure 3 présente des fentes plus importantes entre les languettes élémentaires, et que la partie centrale soit découpée. On pourra également choisir un disque en un matériau métallique souple. Selon une autre variante de la présente invention, non représentée, le système de maintien pourra être constitué de languettes de matière plastique moulée solidaires des extrémités du cylindre interne.A system for holding / locking the locks different from that of Figures 1 and 2 is also illustrated in Figure 3. This variant could be used in other modes of embodiment of the present invention. As shown in the figure 3, the outer tube 22 overflows on both sides of the inner tube 21 and has in the overflow portion an annular groove 29 for receiving a disk 30 for locking a wick. This disc may have in view end, a look similar to that of Figures 1 and 2. It may also be chosen that the Figure 3 shows larger slots between the elementary tabs, and that the central part is cut. We can also choose a disc made of a material flexible metal. According to another variant of the present invention, not shown, the holding system can be consisting of integral molded plastic tongues ends of the inner cylinder.

    La figure 4 représente un quatrième mode de réalisation de la présente invention. La partie gauche de la figure comporte un dispositif similaire à celui de la figure 2 dans lequel de mêmes éléments ont été désignés par de mêmes références. La partie droite 14 de la cavité située à droite de la cloison 15 se prolonge en se divisant en plusieurs cylindres 31 à 34, dont chacun est destiné à recevoir une mèche 35 à 38.FIG. 4 represents a fourth embodiment of the present invention. The left part of the figure includes a device similar to that of Figure 2 in which the same elements have been designated by the same references. The part right 14 of the cavity to the right of the partition 15 is extends by dividing into several cylinders 31 to 34, including each is intended to receive a wick 35 to 38.

    Les figures 5A et 5B représentent en vue de côté et en vue de face un cinquième mode de réalisation de la présente invention. La partie gauche du dispositif de la figure 5A est similaire à celle de la figure 4. Du côté droit de la figure, le dispositif, au lieu de se diviser en plusieurs cylindres, s'évase en un éventail 41, sa face extrême comprenant un système 42 de blocage anti-retrait de plusieurs mèches que l'on peut insérer en parallèle.Figures 5A and 5B show in side view and in front view a fifth embodiment of the present invention. The left part of the device of Figure 5A is similar to Figure 4. On the right side of the figure, the device, instead of dividing into several cylinders, flares in a fan 41, its extreme face including a system 42 of lock anti-withdrawal of several wicks that can be inserted in parallel.

    Ainsi, la présente invention fournit un dispositif de retard particulièrement simple, fiable, réglable et sûr. De plus, ce dispositif peut être de relativement faible coût, être fabriqué en grande série en matière plastique...Thus, the present invention provides a device for particularly simple, reliable, adjustable and safe delay. Moreover, this device can be of relatively low cost, be manufactured in large series in plastic ...

    La figure 6 représente un sixième mode de réalisation de la présente invention dans lequel un même dispositif pyrotechnique de retard peut, au choix de l'utilisateur, réaliser l'un de plusieurs retards prédéterminés.Fig. 6 shows a sixth embodiment of the present invention in which the same pyrotechnic device may, at the option of the user, perform one of several predetermined delays.

    Ce dispositif comprend un tube interne 50, un tube intermédiaire 60 et un tube externe 70.This device comprises an inner tube 50, a tube intermediate 60 and an outer tube 70.

    Le tube interne 50, comme le tube 1 de la figure 1, le tube 11 de la figure 2 ou le tube 21 de la figure 3 a ses parois internes revêtues d'un matériau très inflammable 2. Ce tube 50 est divisé en deux parties par une cloison interne 51. Il comprend des ouvertures traversantes 52 et 53 de part et d'autre de la cloison. The inner tube 50, like the tube 1 of FIG. tube 11 of Figure 2 or the tube 21 of Figure 3 has its walls internally coated with a highly flammable material 2. This tube 50 is divided into two parts by an internal partition 51. It includes through openings 52 and 53 on both sides of the partition.

    Le tube intermédiaire 60 est un tube sur la surface externe duquel sont formées plusieurs pistes 61, 62, 63, longitudinales dans l'exemple représenté, dont les extrémités comportent des ouvertures 61-1, 61-2, 62-1, 62-2 et 63-1, 63-2. Ces ouvertures traversent le tube 60.The intermediate tube 60 is a tube on the surface outer of which are formed several tracks 61, 62, 63, longitudinal in the example shown, whose ends comprise openings 61-1, 61-2, 62-1, 62-2 and 63-1, 63-2. These openings cross the tube 60.

    Enfin, le dispositif comprend un tube externe 70 de protection.Finally, the device comprises an outer tube 70 of protection.

    Le tube externe 70 est monté fixe par rapport au tube intermédiaire 60 qui peut tourner par rapport au-tube interne 50. Divers moyens pourront être prévus pour que, après montage, le tube interne puisse tourner par rapport au tube intermédiaire tout en étant maintenu axialement.The outer tube 70 is fixedly mounted relative to the tube intermediate 60 which can rotate relative to the inner tube 50. Various means may be provided so that, after assembly, the inner tube can rotate relative to the intermediate tube while being held axially.

    Quand les fentes 52, 53 sont, par exemple, en regard des ouvertures 61-1, 61-2, si une mèche est allumée du côté de l'ouverture 61-1, l'allumage est transmis avec un retard déterminé par la piste 61 vers l'ouverture 61-2. En faisant tourner le tube interne par rapport au tube intermédiaire, on peut sélectionner l'un des retards 62 ou 63 ou un autre retard non représenté disposé sur la face non visible du cylindre intermediaire.When the slots 52, 53 are, for example, opposite openings 61-1, 61-2, if a wick is lit on the side of the opening 61-1, the ignition is transmitted with a delay determined by runway 61 to opening 61-2. Doing turn the inner tube relative to the intermediate tube, can select one of the delays 62 or 63 or another delay not shown disposed on the non-visible face of the intermediate cylinder.

    Un premier repère 54 est formé sur le bord externe du tube interne, qui est par exemple légèrement plus long que le tube intermédiaire, pour faciliter sa préhension et sa mise en rotation. Le tube intermédiaire est muni de seconds repères, de préférence à ses deux extrémités, respectivement 61-0, 62-0 et 63-0. Par tout moyen, on peut indiquer en regard de ces repères, la durée du retard correspondant. On pourra par exemple inscrire les durées des retards ou utiliser divers codes de couleurs.A first marker 54 is formed on the outer edge of the inner tube, which for example is slightly longer than the intermediate tube, to facilitate its grip and its rotation. The intermediate tube is provided with second markers, preferably at both ends, respectively 61-0, 62-0 and 63-0. By any means, we can indicate next to these landmarks, the duration of the corresponding delay. For example, we can register the lengths of the delays or use various color codes.

    Selon une variante de l'invention, illustrée en figure 6, une piste 65 s'étend entre les extrémités des pistes 61, 62, 63 du côté opposé au côté où se produit normalement l'allumage. Ainsi, un fois qu'une piste a été allumée et a joué son effet de retard, l'allumage se propage vers les autres pistes et la poudre qu'elles contiennent est brûlée, ce qui évite que le dispositif, une fois utilisé, puisse présenter un danger quelconque. According to a variant of the invention, illustrated in FIG. 6, a track 65 extends between the ends of the tracks 61, 62, 63 on the opposite side to the side where ignition normally occurs. So once a track has been lit and played its effect of delay, the ignition propagates towards the other tracks and the powder they contain is burned, which prevents the device, once used, may present any danger.

    La figure 7 représente une variante du sixième mode de réalisation de la présente invention. Au lieu de prévoir dans le tube interne 50 des rainures 52, 53 de part et d'autre de la cloison 51, on prévoit des ouvertures appariées 56, 57, 58 destinées à coopérer avec des ouvertures correspondantes du tube intermédiaire. Les ouvertures du tube intermédiaire peuvent être celles représentées en figure 6. Ce peut aussi être les ouvertures d'une piste hélicoïdale 71 représentée en figure 7. Dans ce mode de réalisation, il faudra prévoir un nombre de repères identiques 59 du côté du tube interne et 72 du côté du tube externe. Les repères devront être identifiés. De préférence ils seront identifiés par de mêmes couleurs ou de mêmes indications.Figure 7 shows a variant of the sixth mode of embodiment of the present invention. Instead of predicting in the internal tube 50 grooves 52, 53 on both sides of the partition 51, there are provided matched openings 56, 57, 58 intended to cooperate with corresponding openings of the tube intermediate. The openings of the intermediate tube can be those shown in Figure 6. It can also be the openings of a helical track 71 shown in FIG. embodiment, it will be necessary to provide a number of identical references 59 on the side of the inner tube and 72 on the side of the outer tube. The markers will have to be identified. Preferably they will be identified by the same colors or the same indications.

    A titre de variante, dans le cadre de la figure 7, on n'a pas représenté de tube de protection externe. En effet, ce tube pourrait être remplacé par un vernis ou un trempage de la pièce du cylindre intermédiaire dans une substance en matière plastique susceptible de polymériser.As a variant, in the context of FIG. did not represent an external protective tube. Indeed, this tube could be replaced by a varnish or soaking the intermediate cylinder part in a material substance plastic capable of polymerizing.

    Ce sixième mode de réalisation de la présente invention peut paraítre plus complexe que les modes de réalisation décrits précédemment. Toutefois, le coût de fabrication d'un tel dispositif sera plus faible que les autres car il pourrait être fabriqué en très grande série, un même dispositif pouvant être utilisé pour réaliser différents retards. En outre, il ne se posera plus, pour l'utilisateur, le problème d'avoir à stocker des gammes de dispositifs de retard.This sixth embodiment of the present invention may appear more complex than the described embodiments previously. However, the cost of manufacturing such a device will be weaker than the others because it could be manufactured in very large series, the same device that can be used to achieve different delays. In addition, it will not arise again, for the user, the problem of having to store ranges of delay devices.

    Bien entendu, la présente invention est susceptible de diverses variantes et modifications qui apparaítront à l'homme de l'art. En particulier, on peut, dans certain cas, prévoir sur un même dispositif plusieurs pistes dont l'une ou l'autre peut être remplie de matière inflammable, de sorte que, avec une même pièce en matière plastique, on peut réaliser plusieurs retards. De plus les divers mode de réalisation décrits peuvent être combinés ; par exemple les systèmes multiraccord des figures 4 et 5 peuvent être adaptés au premier mode de réalisation de l'invention.Of course, the present invention is capable of various variations and modifications that will appear to the man from art. In particular, one can, in certain cases, provide on a same device several tracks of which one or the other can be filled with flammable material, so that with the same coin made of plastic, several delays can be realized. Moreover the various embodiments described can be combined; for example the multirate systems of Figures 4 and 5 can to be adapted to the first embodiment of the invention.

    Claims (10)

    1. A pyrotechnic device of connection and delay between detonating cords and/or between an igniter and detonating cords, characterized in that it includes:
      a cavity divided up in two parts (6, 7; 13, 14; 23, 24), the internal walls (2) of which are coated with a very flammable material;
      means (3; 30) for blocking one or several detonating cords in each of the parts; and
      means for communicating between the two parts.
    2. The pyrotechnic device of claim 1, characterized in that the two parts (13, 14; 23, 24) are separated by a partition (15; 25) and the communication means includes a track (16; 26), containing a slowly and regularly burning material, extending outside the cavity walls between openings (17, 18; 27, 28) communicating with each of the two cavity parts.
    3. The pyrotechnic device of claim 2, characterized in that it includes:
      a first hollow cylinder (11), the internal cavity of which is divided up in two parts (13, 14; 23, 24) by a partition (15; 25), and the external wall of which includes a track (16; 26) which communicates through openings (17, 18; 27, 28) with said parts; and
      a second hollow cylinder (12), the internal diameter of which corresponds to the external diameter of the first hollow cylinder and in which the first cylinder is inserted.
    4. The pyrotechnic device of claim 2, characterized in that it includes:
      a hollow internal cylinder (50), the internal cavity of which is divided up in two parts by a partition (51) and the external wall of which includes apertures (52, 53; 56, 57, 58); and
      a hollow intermediary cylinder (60) likely to be assembled coaxially and rotatably outside of the internal cylinder, the external wall of the intermediary cylinder including tracks (61, 62, 63; 71), the ends of which communicate through openings with the apertures of the internal cylinder, when the cylinders are properly oriented in rotation.
    5. The pyrotechnic device of claim 3 or 4, characterized in that said track (16; 71) extends helically.
    6. The pyrotechnic device of claim 3 or 4, characterized in that said track(s) (26; 61, 62, 63) extend rectilinearly.
    7. The pyrotechnic device of any of claims 3 or 6, characterized in that said track(s) (16; 26) are filled with a packed-down flammable powder.
    8. The pyrotechnic device of claim 3, characterized in that, on one side, the first cylinder divides up in several tubes (31, 34).
    9. The pyrotechnic device of claim 3, characterized in that, on one side, the first cylinder opens out in a fan (41).
    10. The pyrotechnic device of any of claims 1 to 8, wherein the blocking means (3; 30; 42) includes strips made of a flexible but relatively sturdy material, extending substantially perpendicularly to detonating cord insertion apertures, and likely to deform towards the inside upon insertion of a detonating cord, to block an extraction of the detonating cord.
    EP00410101A 1999-08-24 2000-08-23 Pyrotechnic device for connection and delay Expired - Lifetime EP1079200B9 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9910880 1999-08-24
    FR9910880A FR2797947B1 (en) 1999-08-24 1999-08-24 PYROTECHNIC DEVICE FOR CONNECTION AND DELAY

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    EP1079200A1 EP1079200A1 (en) 2001-02-28
    EP1079200B1 EP1079200B1 (en) 2004-10-13
    EP1079200B9 true EP1079200B9 (en) 2005-01-05

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    EP (1) EP1079200B9 (en)
    AT (1) ATE279710T1 (en)
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    ES (1) ES2228432T3 (en)
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    DE60014810D1 (en) 2004-11-18
    ES2228432T3 (en) 2005-04-16
    EP1079200A1 (en) 2001-02-28
    US6499405B1 (en) 2002-12-31
    FR2797947A1 (en) 2001-03-02
    EP1079200B1 (en) 2004-10-13
    FR2797947B1 (en) 2001-11-16
    DE60014810T2 (en) 2006-03-09

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