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EP0240375B1 - Device for connecting a fuse to an igniter - Google Patents

Device for connecting a fuse to an igniter Download PDF

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Publication number
EP0240375B1
EP0240375B1 EP87400318A EP87400318A EP0240375B1 EP 0240375 B1 EP0240375 B1 EP 0240375B1 EP 87400318 A EP87400318 A EP 87400318A EP 87400318 A EP87400318 A EP 87400318A EP 0240375 B1 EP0240375 B1 EP 0240375B1
Authority
EP
European Patent Office
Prior art keywords
end piece
sleeve
connecting device
forming
igniter
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.)
Expired - Lifetime
Application number
EP87400318A
Other languages
German (de)
French (fr)
Other versions
EP0240375A1 (en
Inventor
Marie-Jacques Jullien
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.)
Ruggieri SA
Original Assignee
Ruggieri SA
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 Ruggieri SA filed Critical Ruggieri SA
Priority to AT87400318T priority Critical patent/ATE55008T1/en
Publication of EP0240375A1 publication Critical patent/EP0240375A1/en
Application granted granted Critical
Publication of EP0240375B1 publication Critical patent/EP0240375B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F42B3/26—Arrangements for mounting initiators; Accessories therefor, e.g. tools
    • 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
    • F42D1/043—Connectors for detonating cords and ignition tubes, e.g. Nonel tubes

Definitions

  • the present invention relates to pyrotechnic products for fireworks and relates more particularly to the ignition of pyrotechnic products.
  • a pyrotechnic firework product generally consists of a tubular casing made of cardboard or the like which contains a dose of igniting powder linked by a delay to a firework composition.
  • the ignition powder is connected to a wick, the ignition of which is ensured using a lighter.
  • Electric ignition means are also used in which case the end of the wick opposite the dose of ignition powder is placed in contact with an igniter or match, constituted by a conductive filament coated with a flammable composition and connected by two electrical conductors to an energy source such as a battery (for example DE-C 745 360).
  • an igniter or match constituted by a conductive filament coated with a flammable composition and connected by two electrical conductors to an energy source such as a battery (for example DE-C 745 360).
  • connection between the wick and the igniter is generally protected by a plastic or cardboard sleeve surrounding the igniter, in which it is engaged.
  • connection between the wick and the igniter is devoid of weather protection.
  • the invention aims to remedy the above drawbacks of conventional connection means by creating a connection device between an igniter and a fuse for igniting a pyrotechnic product, which, while being simple in construction, is quick to install. and has increased operational safety.
  • a connecting device between a firing wick of a pyrotechnic product and an electric igniter characterized in that it comprises a nozzle forming a socket fixed to one end of the wick and a sleeve surrounding the igniter, and forming a plug, engaged in said tip, the latter comprising an inner rim for holding in position the sleeve forming a plug in said tip.
  • the pyrotechnic product which represents in FIG. 1 is a fireworks rocket 1 provided with a fuse 2 connected to an igniter connected to a source of electrical energy such as a battery by an electric wire 3 with two conductors via 'A connecting device 4 according to the invention.
  • connection device between the wick and the igniter shown in Fig.2 essentially comprises a nozzle 5 forming a socket provided with a tubular connection 6 made of material engaged between the wick 7 itself and the sheath 8 of plastic material this one.
  • the connector 6 advantageously has external projections 9 intended to ensure its axial retention with respect to the sheath 8 and internal projections 10 for axial maintenance of the wick 7.
  • the endpiece 5 has a flange 11 facing inwards intended to ensure the holding in position of a sleeve 12 forming a plug and containing an igniter 13 whose resistive filament 14 surrounded by a flammable material 15 is connected to two electrical conductors 16 intended to be connected to an energy source such as a battery not shown.
  • the tip 5 and the sleeve 12 forming a plug are advantageously made of plastic.
  • the end piece 5 also has axial slots 17 intended to facilitate the insertion of the sleeve 12 forming a plug into the cavity of the socket 5 by spacing its side walls delimited by the slots, the inner rim 11 of the socket closing on the rear end of the sleeve 12 to immobilize it in translation.
  • the slots 17 also allow the withdrawal of the sleeve 12 and consequently of the igniter 13 by spacing the lips formed by the rim 11.
  • connection device which has just been described is supplemented by a plastic cap 18 which covers the end piece 5 and clamps the conductors 16.
  • This cap provides additional security for the connection between the end piece 5 and the sleeve 12 and improves the tightness of the assembly to bad weather.
  • Fig.3 there is partially shown a variant of the connecting device according to the invention in which the end piece 5a is provided with internal axial grooves 19 extended by grooves 20 extending roughly perpendicular to the grooves 19 and with which cooperate diametrically opposite lugs 21 provided on the outer surface of the sleeve 12a forming a plug.
  • the lugs 21 are engaged in the axial grooves 19 and when they reach the bottom of these grooves, a rotation of the sleeve 12! 1 ensures their engagement in the grooves 20 and immobilization of the sleeve 12 e relative to the tip 5 °.
  • a bayonet device is known as a bayonet device.
  • FIG.4 there is shown a connecting device according to the invention incorporated in a pyrotechnic product.
  • the pyrotechnic product comprises an envelope 25 containing a mass of igniting powder 26 and a wick 27 provided with a nozzle 28 forming a socket, housed in an axial orifice 29 of an end wall of the envelope 25.
  • a sleeve 30 forming a plug and protecting an igniter 31 is engaged in the socket 28.
  • the igniter 31 is connected to two electrical conductors which are intended to be connected to a source of electrical energy not shown.
  • FIG.4 shows that it is possible to integrate the connecting device according to the invention directly and therefore without intermediate cord to a pyrotechnic part.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)
  • Control Of Combustion (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

The connecting device between a firing fuse (2) of a pyrotechnic product and an electric igniter (13) comprises an end member (5) forming a socket fixed to one end of the fuse (2) and a sleeve (12) surrounding the igniter (13) and constituting a plug engaged in the socket (5).

Description

La présente invention est relative aux produits pyrotechniques pour pièces d'artifice et se rapporte plus particulièrement à l'allumage des produits pyrotechniques.The present invention relates to pyrotechnic products for fireworks and relates more particularly to the ignition of pyrotechnic products.

Un produit pyrotechnique d'artifice est généralement constitué par une enveloppe tubulaire en carton ou analogue qui contient une dose de poudre de mise à feu reliée par un retard à une composition d'artifice.A pyrotechnic firework product generally consists of a tubular casing made of cardboard or the like which contains a dose of igniting powder linked by a delay to a firework composition.

La poudre de mise à feu est reliée à une mèche dont l'allumage est assuré à l'aide d'un briquet.The ignition powder is connected to a wick, the ignition of which is ensured using a lighter.

On utilise également des moyens d'allumage électriques auquel cas l'extrémité de la mèche opposée à la dose de poudre de mise à feu est placée en contact avec un inflammateur ou allumette, constitué par un filament conducteur enrobé d'une composition inflammable et connecté par deux conducteurs électriques à une source d'énergie telle qu'une pile (par exemple DE-C 745 360).Electric ignition means are also used in which case the end of the wick opposite the dose of ignition powder is placed in contact with an igniter or match, constituted by a conductive filament coated with a flammable composition and connected by two electrical conductors to an energy source such as a battery (for example DE-C 745 360).

La liaison entre la mèche et l'allumeur est généralement protégée par un manchon en matière plastique ou en carton entourant l'inflammateur, dans lequel elle est engagée.The connection between the wick and the igniter is generally protected by a plastic or cardboard sleeve surrounding the igniter, in which it is engaged.

Un tel agencement présente un certain nombre d'inconvénients.Such an arrangement has a number of drawbacks.

Le positionnement de l'extrémité de la mèche par rapport à l'allumeur est imprécis et peu fiable. Il en résulte de nombreux défauts de fonctionnement à l'allumage.The positioning of the end of the wick relative to the igniter is imprecise and unreliable. This results in numerous malfunctions upon ignition.

La liaison entre la mèche et l'allumeur est dépourvue de protection contre les intempéries.The connection between the wick and the igniter is devoid of weather protection.

Le maintien de la liaison entre la mèche et l'allumeur nécessite l'emploi de moyens d'immobilisation tels que du papier entourant l'ensemble et maintenu par de la ficelle, ce qui augmente le coût de la mise en place des feux d'artifice.Maintaining the connection between the wick and the igniter requires the use of immobilization means such as paper surrounding the assembly and maintained by string, which increases the cost of setting up the lights. artifice.

L'invention vise à remédier aux inconvénients ci- dessus des moyens de liaison classiques en créant un dispositif de liaison entre un inflammateur et une mèche de mise à feu de produit pyrotechnique, qui tout en étant de construction simple, soit rapide à mettre en place et présente une sécurité de fonctionnement accrue.The invention aims to remedy the above drawbacks of conventional connection means by creating a connection device between an igniter and a fuse for igniting a pyrotechnic product, which, while being simple in construction, is quick to install. and has increased operational safety.

Elle a donc pour objet un dispositif de liaison entre une mèche de mise à feu d'un produit pyrotechnique et un inflammateur électrique, caractérisé en ce qu'il comprend un embout formant douille fixé à une extrémité de la mèche et un manchon entourant l'in- flammteur, et formant fiche, engagé dans ledit embout, celui-ci comportant un rebord intérieur de maintien en position du manchon formant fiche dans ledit embout.It therefore relates to a connecting device between a firing wick of a pyrotechnic product and an electric igniter, characterized in that it comprises a nozzle forming a socket fixed to one end of the wick and a sleeve surrounding the igniter, and forming a plug, engaged in said tip, the latter comprising an inner rim for holding in position the sleeve forming a plug in said tip.

L'invention sera mieux comprise à l'aide de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés, sur lesquels:

  • - la Fig. 1 est une vue schématique d'un produit pyrotechnique équipé d'un dispositif de liaison suivant l'invention;
  • - la Fig. 2 est une vue en élévation et en coupe du dispositif de liaison suivant l'invention;
  • - la Fig. 3 est une vue partielle éclatée d'une variante du dispositif de liaison suivant l'invention; et
  • - la Fig. 4 est une vue partielle en coupe d'un dispositif de liaision suivant l'invention incorporé à un produit pyrotechnique.
The invention will be better understood with the aid of the description which follows, given solely by way of example and made with reference to the appended drawings, in which:
  • - Fig. 1 is a schematic view of a pyrotechnic product equipped with a connection device according to the invention;
  • - Fig. 2 is a view in elevation and in section of the connecting device according to the invention;
  • - Fig. 3 is a partial exploded view of a variant of the connection device according to the invention; and
  • - Fig. 4 is a partial sectional view of a connection device according to the invention incorporated into a pyrotechnic product.

Le produit pyrotechnique qui représente à la Fig. 1 est une fusée d'artifice 1 pourvue d'une mèche 2 de mise à feu reliée à un inflammateur connecté à une source d'énergie électrique telle qu'une pile par un fil électrique 3 à deux conducteurs par l'intér- mediaire d'un dispositif de liaison 4 suivant l'invention.The pyrotechnic product which represents in FIG. 1 is a fireworks rocket 1 provided with a fuse 2 connected to an igniter connected to a source of electrical energy such as a battery by an electric wire 3 with two conductors via 'A connecting device 4 according to the invention.

Le dispositif de liaison entre la mèche et l'allumeur représenté à la Fig.2, comporte essentiellement un embout 5 formant douille pourvu d'un raccord tubulaire 6 venu de matière engagé entre la mèche 7 proprement dite et la gaine 8 en matière plastique de celle-ci. Le raccord 6 présente avantageusement des saillies externes 9 destinées à assurer son maintien axial par rapport à la gaine 8 et des saillies internes 10 de maintien axial de la mèche 7.The connection device between the wick and the igniter shown in Fig.2, essentially comprises a nozzle 5 forming a socket provided with a tubular connection 6 made of material engaged between the wick 7 itself and the sheath 8 of plastic material this one. The connector 6 advantageously has external projections 9 intended to ensure its axial retention with respect to the sheath 8 and internal projections 10 for axial maintenance of the wick 7.

A son extrémité libre, l'embout 5 comporte un rebord 11 tourné vers l'intérieur destiné à assurer le maintien en position d'un manchon 12 formant fiche et contenant un inflammateur 13 dont le filament ré- sistif 14 entouré par une matière inflammable 15 est connecté à deux conducteurs électriques 16 destinés à être reliés à une source d'énergie telle qu'une pile non représentée.At its free end, the endpiece 5 has a flange 11 facing inwards intended to ensure the holding in position of a sleeve 12 forming a plug and containing an igniter 13 whose resistive filament 14 surrounded by a flammable material 15 is connected to two electrical conductors 16 intended to be connected to an energy source such as a battery not shown.

L'embout 5 et le manchon 12 formant fiche sont avantageusement réalisés en matière plastique.The tip 5 and the sleeve 12 forming a plug are advantageously made of plastic.

L'embout 5 présente en outre des fentes axiales 17 destinées à faciliter l'insertion du manchon 12 formant fiche dans la cavité de la douille 5 par écartement de ses parois latérales délimitées par les fentes, le rebord intérieur 11 de la douille se refermant sur l'extrémité arrière du manchon 12 pour l'immobiliser en translation. Les fentes 17 permettent également le retrait du manchon 12 et par conséquent de l'inflammateur 13 par écartement des lévres formées par le rebord 11.The end piece 5 also has axial slots 17 intended to facilitate the insertion of the sleeve 12 forming a plug into the cavity of the socket 5 by spacing its side walls delimited by the slots, the inner rim 11 of the socket closing on the rear end of the sleeve 12 to immobilize it in translation. The slots 17 also allow the withdrawal of the sleeve 12 and consequently of the igniter 13 by spacing the lips formed by the rim 11.

On voit donc que grâce à un tel agencement, on parvient à assurer une liaison rapide et sure de l'inflammateur 13 avec l'extrémité de la mèche 7 qui débouche dans l'embout 5.We therefore see that thanks to such an arrangement, we manage to ensure a quick and safe connection of the igniter 13 with the end of the wick 7 which opens into the nozzle 5.

Le dispositif de liaison qui vient d'être décrit est complété par un capuchon 18 en matière plastique qui vient coiffer l'embout 5 et pince les conducteurs 16. Ce capuchon assure une sécurité supplémentaire de la liaison entre l'embout 5 et le manchon 12 et améliore l'étanchéité de l'ensemble aux intempéries.The connection device which has just been described is supplemented by a plastic cap 18 which covers the end piece 5 and clamps the conductors 16. This cap provides additional security for the connection between the end piece 5 and the sleeve 12 and improves the tightness of the assembly to bad weather.

A la Fig.3, on a représenté partiellement une variante du dispositif de liaison suivant l'invention dans laquelle l'embout 5a est pourvu de rainures axiales internes 19 prolongées par des gorges 20 s'étendant à peu près perpendiculairement aux rainures 19 et avec lesquelles coopérent des ergots 21 diamètralement opposés prévus sur la surface extérieure du manchon 12a formant fiche. Lors de l'introduction du manchon 1211 dans l'embout 5°, les ergots 21 sont engagés dans les rainures axiales 19 et lorsqu'ils arrivent au fond de ces rainures, une rotation du manchon 12!1 assure leur engagement dans les gorges 20 et l'immobilisation du manchon 12e par rapport à l'embout 5°. Un tel dispositif est connu sous le nom de dispositif à baionnette.In Fig.3, there is partially shown a variant of the connecting device according to the invention in which the end piece 5a is provided with internal axial grooves 19 extended by grooves 20 extending roughly perpendicular to the grooves 19 and with which cooperate diametrically opposite lugs 21 provided on the outer surface of the sleeve 12a forming a plug. When the sleeve 1211 is introduced into the tip 5 °, the lugs 21 are engaged in the axial grooves 19 and when they reach the bottom of these grooves, a rotation of the sleeve 12! 1 ensures their engagement in the grooves 20 and immobilization of the sleeve 12 e relative to the tip 5 °. Such a device is known as a bayonet device.

Sur la Fig.4, on a representé un dispositif de liaison suivant l'invention incorporé à un produit pyrotechnique.In Fig.4, there is shown a connecting device according to the invention incorporated in a pyrotechnic product.

Le produit pyrotechnique comporte une enveloppe 25 contenant une masse de poudre de mise à feu 26 et une mèche 27 pourvu d'un embout 28 formant douille, logé dans un orifice axial 29 d'une paroi d'extrémité de l'enveloppe 25. Un manchon 30 formant fiche et protégeant un inflammateur 31 est engagé dans la douille 28. L'inflammateur 31 est relié à deux conducteurs électriques qui sont destinés à être connectés à une source d'énergie électrique non représentée.The pyrotechnic product comprises an envelope 25 containing a mass of igniting powder 26 and a wick 27 provided with a nozzle 28 forming a socket, housed in an axial orifice 29 of an end wall of the envelope 25. A sleeve 30 forming a plug and protecting an igniter 31 is engaged in the socket 28. The igniter 31 is connected to two electrical conductors which are intended to be connected to a source of electrical energy not shown.

La construction de l'embout 29 et du manchon 30 formant fiche est identique à celle des pièces correspondantes du dispositif de liaison de la Fig.2.The construction of the end piece 29 and of the sleeve 30 forming a plug is identical to that of the corresponding parts of the connection device in FIG.

L'agencement représenté à la Fig.4, montre qu'il est possible d'intégrer le dispositif de liaison suivant l'invention directement et par conséquent sans cordon intermédiaire à une pièce pyrotechnique.The arrangement shown in Fig.4, shows that it is possible to integrate the connecting device according to the invention directly and therefore without intermediate cord to a pyrotechnic part.

Claims (7)

1. Connecting device between a fuse (2, 27) for firing a pyrotechnic product and an electric igniter (13, 31), characterized in that it comprises a socket-forming end piece (5, 27) fixed to one end of the fuse (2, 27) and a sleeve (12, 30) surrounding the igniter (13, 31) and forming a plug, which is engaged in said end piece (5, 28), the latter having an internal rim (11) for maintaining in position the plug-forming sleeve (12) in said end piece (5).
2. Connecting device according to claim 1, characterized in that said socket-forming end piece (5) has a tubular coupling (6) engaged between the actual fuse (7) and its sheath (8).
3. Connecting device according to claim 2, characterized in that said tubular coupling (6) has outer projections (9) for axially maintaining in place the end piece relative to the sheath (8) and internal projections (10) for axially maintaining in place the actual fuse (7).
4. Connecting device according to one of the claims 2 and 3, characterized in that the socket-forming end piece (5) has axial slits (17) permitting the moving apart of the side walls of the end piece (5) during the introduction of sleeve (12) into the latter or the retraction of sleeve (12) therefrom.
5. Connecting device according to one of the claims 2 and 3, characterized in that the end piece (5a) has axial slots (19) terminated by grooves (20) transverse with respect to said slots and cooperating with projections (29) on said sleeve (12a) for forming a device for the bayonet fixing of the sleeve in end piece (5a).
6. Connecting device according to one of the claims 1 to 5, characterized in that it also has a protective cap (18) mounted on end piece (5) following the engagement of sleeve (12) into the same.
7. Connecting device according to one of the claims 1, 4 and 5, characterized in that said end piece (28) is directly mounted in an orifice (29) of the envelope (25) of a pyrotechnic device.
EP87400318A 1986-02-24 1987-02-12 Device for connecting a fuse to an igniter Expired - Lifetime EP0240375B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87400318T ATE55008T1 (en) 1986-02-24 1987-02-12 DEVICE FOR CONNECTING A DELIGHT TO A LIGHTER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8602514A FR2594823B1 (en) 1986-02-24 1986-02-24 CONNECTION DEVICE BETWEEN A FIRE WICK OF A PYROTECHNIC PRODUCT AND AN INFLAMMATOR
FR8602514 1986-02-24

Publications (2)

Publication Number Publication Date
EP0240375A1 EP0240375A1 (en) 1987-10-07
EP0240375B1 true EP0240375B1 (en) 1990-07-25

Family

ID=9332456

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87400318A Expired - Lifetime EP0240375B1 (en) 1986-02-24 1987-02-12 Device for connecting a fuse to an igniter

Country Status (6)

Country Link
US (1) US4825764A (en)
EP (1) EP0240375B1 (en)
AT (1) ATE55008T1 (en)
DE (1) DE3763876D1 (en)
ES (1) ES2017724B3 (en)
FR (1) FR2594823B1 (en)

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US6125762A (en) * 1997-07-03 2000-10-03 The Ensign-Bickford Company Flat-form separation devices
FR2866702B1 (en) 2004-02-25 2008-03-07 Ardi BONDING ELEMENT FOR A PYROTECHNIC FIRE-SETTING CHAIN OF A ENTERTAINMENT ARTIFICE
US20060060575A1 (en) * 2004-09-17 2006-03-23 Lindsey Kevin M Fireworks safety lighter
CN101551217B (en) * 2008-04-01 2012-11-28 周正江 Connector of stage fountain firework and electric igniter
US9435618B2 (en) * 2014-05-14 2016-09-06 Billy R Dean Fireworks safety igniter
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US11709037B2 (en) * 2016-09-02 2023-07-25 Pyromart Inc. Automated detonation of fireworks
US11713142B2 (en) * 2017-12-01 2023-08-01 Ensign-Bickford Aerospace & Defense Comany Separation device assemblies
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Also Published As

Publication number Publication date
US4825764A (en) 1989-05-02
FR2594823B1 (en) 1992-06-12
ES2017724B3 (en) 1991-03-01
DE3763876D1 (en) 1990-08-30
ATE55008T1 (en) 1990-08-15
FR2594823A1 (en) 1987-08-28
EP0240375A1 (en) 1987-10-07

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