EP0030052A1 - Telescopic projectile - Google Patents

Telescopic projectile Download PDF

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Publication number
EP0030052A1
EP0030052A1 EP80201098A EP80201098A EP0030052A1 EP 0030052 A1 EP0030052 A1 EP 0030052A1 EP 80201098 A EP80201098 A EP 80201098A EP 80201098 A EP80201098 A EP 80201098A EP 0030052 A1 EP0030052 A1 EP 0030052A1
Authority
EP
European Patent Office
Prior art keywords
tail
head
projectile
projectile according
aforesaid
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
EP80201098A
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German (de)
French (fr)
Other versions
EP0030052B1 (en
Inventor
André Jozef Christiaan Gabriels
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.)
FABRIQUE NATIONALE NOUVELLE HERSTAL, AFGEKORT FNNH
Original Assignee
FN Herstal SA
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Filing date
Publication date
Priority claimed from BE2/58240A external-priority patent/BE880348A/en
Application filed by FN Herstal SA filed Critical FN Herstal SA
Priority to AT80201098T priority Critical patent/ATE4841T1/en
Publication of EP0030052A1 publication Critical patent/EP0030052A1/en
Application granted granted Critical
Publication of EP0030052B1 publication Critical patent/EP0030052B1/en
Expired legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/18—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
    • F42B10/02—Stabilising arrangements
    • F42B10/12—Stabilising arrangements using fins longitudinally-slidable with respect to the projectile or missile
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B30/00—Projectiles or missiles, not otherwise provided for, characterised by the ammunition class or type, e.g. by the launching apparatus or weapon used
    • F42B30/04—Rifle grenades

Definitions

  • An object of the invention is to lower the cost of such projectiles by replacing conventional firing devices (such as mechanical, electromechanical rockets and the like) for launching and fragmentation, by clearly simpler means, without prejudice, however. efficiency, reliability and operational safety.
  • Another object of the invention is to reduce the size of said projectiles, during their storage and / or transport.
  • Another object of the invention is to improve the effectiveness of such projectiles, particularly in anti-personnel use.
  • Yet another object is to increase the sensitivity of the projectile to impact.
  • the invention provides a projectile having a head extended by a tubular tail and containing an explosive charge as well as a pyrotechnic chain for the latter, projectile characterized in that said tail is produced in two telescopic parts, one of which is integral with said head and carries therewith a first part of said chain and the other part of which carries the remainder of the latter, guide means being distributed over said two parts in order to assign them relative angular positions determined as a function of their relative axial positions.
  • the projectile represented in FIGS. 1-16 comprises a head 1 and a telescopic tubular tail 2 with tail section 3.
  • the tail 2 is made in two parts, one of which - 4 - is integral with the head 1 and the other - 5 - of which can slide around the first.
  • the front end of the part 5 is provided with a collar 6, the shape of which complements that of the head 1 when the projectile is in the position of FIG. 1 or at impact.
  • the body of the tail part 4 constitutes the load projectile explosive.
  • This explosive is composed for example of a secondary explosive such as hexogen, octogen, pentrite, with a plastic binder such as nylon, polybutadiene, polyurethane, polyester or the like.
  • This explosive charge can be manufactured according to one of the known methods by casting or compression depending on the type of binder.
  • Part 5 is made of prefragmented metal.
  • the firing pyrotechnic chain comprises- on the one hand, a percussion point 7 provided on the rear face of the head 1 as well as a secondary relay 8 inserted in said explosive charge and, on the other hand, a detonator 9 and a primary relay 10 housed in the front face of said collar 6.
  • Guide means are distributed on the two parts 4 and 5 in order to impose angular positions relatively v are chosen based on their respective axial positions.
  • these means consist of a set of grooves, detailed below, provided in the body of part 4 and in a finger 11, mounted on the spring 12, provided in the flange 6.
  • Said set of grooves has two grooves 13 and 14 extending along two generatrices of the body 4 and here spaced apart by 180 °.
  • the groove 1 3 is extended by a curved part 15 ending under the percussion tip 7.
  • the groove 13 is connected to the groove 14 by a connecting groove 16.
  • a recess 17 separated from the latter by a thin wall 18.
  • Positioning bosses 19 and 20 are respectively provided in the bottom of the grooves 16 ( Figure 11) and 15 ( Figure 15).
  • the rear end of the part 4 is provided with a caudal piece 21 serving as a support, on the one hand, for a shutter 22 (for example as described in another request of the Request) and, on the other hand , to an external spring 23 also bearing on an annular stop 24 engaging an internal projection 25 of said part 5.
  • a deformable safety element 26 is provided between the end of the tail piece 21 and the annular stop 24.
  • the flange 6 has a recess 27 intended to accommodate the percussion point 7 when the projectile is in the state of FIG. 1 (transport).
  • the bore of the tail part 4 is extended by a corresponding passage 28 in the head 1, the front wall of which is provided with a circular weakening zone 29.
  • part 5 occupies an angular position, relative to the head 1 and part 4 - such that the point 7 is located in the housing 27 (figure 3).
  • the projectile thus has a minimum bulk and its pyrotechnic chain is misaligned (see Figure 2).
  • the parts 4 and 5 are mutually locked in this position by engagement of the finger 11 behind a boss 30 (FIG. 5) provided on the bottom of the groove 14.
  • the launch can be carried out using a special propellant cartridge or an ordinary bullet cartridge.
  • the launch is carried out using a bullet ammunition, the latter will pass through the shutter 22 which will close behind it, which prevents the propellant gases from escaping.
  • the bullet passes the explosive charge 4 through the central channel, arrives in the passage 28 of the head 1 and escapes from the head 1 by breaking the zone 29.
  • the head 1 - tail 4 assembly receives all the propelling force and accelerates relative to the tail part 5. This results in the permanent deformation of the safety element 26, the compression of the spring 23 and the entry of finger 11 into groove 13 (see FIG. 12).
  • part 5 catches up with the head 1 - tail 4 assembly, under the joint action of the trigger, of spring 23, of the difference in weight between the elements named (the first part of the tail being lighter than the second) and the difference of their respective aerodynamic coefficients.
  • the finger 11 runs through the groove 13. If, during this phase, an obstacle was encountered by the projectile, the finger 11 would fracture the thin wall -18 to arrive in the recess 17. In this position, the firing of the detonator 9 cannot take place, the latter not being aligned with the striker 7. This constitutes the security of start of trajectory.
  • the sensitivity is further increased thanks to the high mass of part 5, carrying in the collar 6 the detonator 9.
  • This high mass is set in motion upon impact of the projectile and communicates all of its energy to the detonator when it strikes the striker 7.
  • the tail part 5 After firing the pyrotechnic chain, the tail part 5 gives rise to a quantity of fragments, under the effect of the detonation of the explosive charge 4.
  • a thin fracturable wall could be provided in the groove 16.
  • the projection 38 is engaged in its housing, so that the finger 35 of the ring 33 is engaged in the groove 14, the finger 36 overhanging the groove 13.
  • the inertia When firing, the inertia causes the compression of the spring 23, the repression of the finger 35 out of the groove 14 with rupture of the projection 38 and penetration of the finger 36 in the groove 13.
  • the projectile then behaves as in the previous example.
  • the presence of the spring 23 is not essential if the shapes and weights of the elements are judiciously chosen.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

Abstract

1. Projectile having a head (1) extended by a tubular tail (2) made up of two tubular telescopic parts (4, 5), the first (4) of which is solidary with the aforesaid head (1), being mainly constituted by an explosive charge, whilst the second one (5) may slide around the first part (4) of the tail, characterized in that the aforesaid first (4) and second (5) parts of the tail carry respectively a first (7, 8) and second (9, 10) parts of a chain of firing the aforesaid explosive charge and in that guiding means (11, 13) are distributed on the first (4) and second (5) parts of the tail (4, 5), in order to give them a determined angular position corresponding to their relative axial position, the aforesaid guiding means (11, 13) being constituted, one the one hand, by at least one groove (13) provided for in one part (4) of the tail and extending according to a generating line of same and, on the other hand, by at least one finger (11) carried by the other part (5) of the aforesaid tail, the end of the aforesaid groove (13) being prolonged by a curved groove (15) in the vicinity of the head (1), and a recess (17) being provided between the aforesaid curved groove (15) and head (1), this recess (17) being separated from the curved groove (15) by a partition wall (18), the aforesaid finger (11) fracturing the aforesaid wall in order to come into the aforesaid recess (17) if during the releasing of the projectile an obstacle is being encountered.

Description

La présente invention concerne un projectile télescopique tel que par exemple une grenade destinée à être lancée à l'aide d'un fusil.The present invention relates to a telescopic projectile such as for example a grenade intended to be launched using a rifle.

Un but de l'invention est d'abaisser le coût de tels projectiles en remplaçant les dispositifs classiques de mise à feu (tels que fusées mécaniques, électromécaniques et similaires) de lancement et de fragmentation, par des moyens nettement plus simples, sans préjudice toutefois d'efficacité de la fiabilité et de la sécurité de fonctionnement.An object of the invention is to lower the cost of such projectiles by replacing conventional firing devices (such as mechanical, electromechanical rockets and the like) for launching and fragmentation, by clearly simpler means, without prejudice, however. efficiency, reliability and operational safety.

Un autre but de l'invention est de réduire l'encombrement desdits projectiles, lors de leur stockage et/ou transport.Another object of the invention is to reduce the size of said projectiles, during their storage and / or transport.

Un autre but de l'invention est d'améliorer l'efficacité de tels projectiles, particulièrement en utilisation antipersonnel.Another object of the invention is to improve the effectiveness of such projectiles, particularly in anti-personnel use.

Un autre but encore est d'augmenter la sensibilité du projectile à l'impact.Yet another object is to increase the sensitivity of the projectile to impact.

A cet effet, l'invention propose un projectile ayant une tête prolongée par une queue tubulaire et contenant une charge explosive ainsi qu'une chaîne pyrotechnique pour cette dernière, projectile caractérisé en ce que ladite queue est réalisée en deux parties télescopiques dont l'une est solidaire de ladite tête et porte avec celle-ci une première partie de ladite chaîne et dont l'autre partie porte le restant de cette dernière, des moyens de guidage étant répartis sur lesdites deux parties afin de leur assigner des positions angulaires relatives déterminées en fonction de leurs positions axiales relatives.To this end, the invention provides a projectile having a head extended by a tubular tail and containing an explosive charge as well as a pyrotechnic chain for the latter, projectile characterized in that said tail is produced in two telescopic parts, one of which is integral with said head and carries therewith a first part of said chain and the other part of which carries the remainder of the latter, guide means being distributed over said two parts in order to assign them relative angular positions determined as a function of their relative axial positions.

Ces moyens de guidage sont tels que le projectile peut être amené dans les états suivants :

  • 1.- stockage et transport : les deux parties de queue sont télescopées et la chaîne pyrotechnique est interrompue, respectivement non alignée;
  • 2.- lancement : les deux parties de queue sont en extension maximum et la chaîne pyrotechnique est non alignée;
  • 3.- début de trajectoire : les deux parties de queue retournent à l'état télescopé en effectuant une rotation relative amenant l'alignement de la chaîne pyrotechnique;
  • 4.- vol et impact : les deux parties de queue sont télescopées et la chaîne pyrotechnique est alignée.
These guide means are such that the projectile can be brought into the following states:
  • 1.- storage and transport: the two tail parts are telescoped and the pyrotechnic chain is interrupted, respectively not aligned;
  • 2.- launch: the two tail parts are in maximum extension and the pyrotechnic chain is not aligned;
  • 3.- start of trajectory: the two tail parts return to the telescoped state by performing a relative rotation bringing the alignment of the pyrotechnic chain;
  • 4.- flight and impact: the two tail parts are telescoped and the pyrotechnic chain is aligned.

Pour plus de clarté, un exemple de réalisation de l'invention est décrit ci-après, à titre illustratif et non restrictif, avec référence aux dessins annexés, dans lesquels :

  • la figure 1 représente un projectile selon l'invention en position de stockage et transport;
  • la figure 2 est une coupe selon la ligne II-II de la figure 1;
  • la figure 3 est une coupe selon la ligne III-III de la figure 2;
  • la figure 4 est une vue du projectile selon la figure 1, en position de lancement;
  • les figures 5-11 sont des coupes selon les lignes V-V à XI-XI de la figure 4, la figure 11 étant une coupe partielle à échelle agrandie;
  • la figure 12 est une vue à échelle agrandie de la partie centrale de la figure 5 mais au départ du projectile;
  • la figure 13 représente la partie avant du projectile en position "prêt à l'impact";
  • la figure 14 est une coupe selon la ligne XIV-XIV de la figure 13;
  • les figures 15 et 16 sont des coupes partielles selon les lignes XV-XV et XVI-XVI de la figure 14;
  • la figure 17 est une vue similaire à celle de la figure 5, d'une variante intéressante d'exécution de l'invention;
  • la figure 18 représente la partie de la figure 17 indiquée par la flèche F18, dans une autre position caractéristique; et
  • la figure 19 est une coupe selon la ligne XIX-XIX de la figure 17.
For greater clarity, an exemplary embodiment of the invention is described below, by way of illustration and without limitation, with reference to the appended drawings, in which:
  • FIG. 1 represents a projectile according to the invention in the storage and transport position;
  • Figure 2 is a section along the line II-II of Figure 1;
  • Figure 3 is a section along line III-III of Figure 2;
  • Figure 4 is a view of the projectile according to Figure 1, in the launch position;
  • Figures 5-11 are sections along lines VV to XI-XI of Figure 4, Figure 11 being a partial section on an enlarged scale;
  • Figure 12 is an enlarged view of the central part of Figure 5 but from the projectile;
  • FIG. 13 represents the front part of the projectile in the "ready to impact"position;
  • Figure 14 is a section along the line XIV-XIV of Figure 13;
  • Figures 15 and 16 are partial sections along lines XV-XV and XVI-XVI of Figure 14;
  • Figure 17 is a view similar to that of Figure 5, of an interesting alternative embodiment of the invention;
  • FIG. 18 represents the part of FIG. 17 indicated by the arrow F18, in another characteristic position; and
  • Figure 19 is a section along line XIX-XIX of Figure 17.

Le projectile représenté aux figures 1-16 comporte une tête 1 et une queue tubulaire télescopique 2 avec empennage 3.The projectile represented in FIGS. 1-16 comprises a head 1 and a telescopic tubular tail 2 with tail section 3.

La queue 2 est réalisée en deux parties dont l'une - 4 - est solidaire de la tête 1 et dont l'autre - 5 - peut coulisser autour de la première.The tail 2 is made in two parts, one of which - 4 - is integral with the head 1 and the other - 5 - of which can slide around the first.

L'extrémité avant de la partie 5 est pourvue d'une collerette 6 dont la forme vient compléter celle de la tête 1 lorsque le projectile est dans la position de la figure 1 ou à l'impact.The front end of the part 5 is provided with a collar 6, the shape of which complements that of the head 1 when the projectile is in the position of FIG. 1 or at impact.

Le corps de la partie de queue 4 constitue la charge explosive du projectile. Cet explosif est composé par exemple d'un explosif secondaire tel que l'héxogène, l'octogène, la pentrite, avec un liant en matière plastique tel que le nylon, le polybutadiène, le polyuréthane, le polyester ou autre. Cette charge explosive peut être fabriquée selon un des procédés connus par coulage ou compression dépendant du type de liant. La partie 5 est réalisée en métal préfragmenté.The body of the tail part 4 constitutes the load projectile explosive. This explosive is composed for example of a secondary explosive such as hexogen, octogen, pentrite, with a plastic binder such as nylon, polybutadiene, polyurethane, polyester or the like. This explosive charge can be manufactured according to one of the known methods by casting or compression depending on the type of binder. Part 5 is made of prefragmented metal.

La chaîne pyrotechnique de mise à feu comprend-, d'une part, une pointe de percussion 7 prévue sur la face arrière de la tête 1 ainsi qu'un relais secondaire 8 enfoncé dans ladite charge explosive et, d'autre part, un détonnateur 9 et un relais primaire 10 logés dans la face avant de ladite collerette 6.The firing pyrotechnic chain comprises- on the one hand, a percussion point 7 provided on the rear face of the head 1 as well as a secondary relay 8 inserted in said explosive charge and, on the other hand, a detonator 9 and a primary relay 10 housed in the front face of said collar 6.

Des moyens de guidage sont répartis sur les deux parties 4 et 5 afin de leur imposer des positions angulaires relati- ves choisies en fonction de leurs positions axiales respectives. Dans l'exemple représenté, ces moyens consistent en un jeu de rainures, détaillé ci-après, prévu dans le corps de la partie 4 et en un doigt 11, monté sur le ressort 12, prévu dans la collerette 6.Guide means are distributed on the two parts 4 and 5 in order to impose angular positions relatively v are chosen based on their respective axial positions. In the example shown, these means consist of a set of grooves, detailed below, provided in the body of part 4 and in a finger 11, mounted on the spring 12, provided in the flange 6.

Ledit jeu de rainures comporte deux rainures 13 et 14 s'étendant selon deux génératrices du corps 4 et mutuellement espacées ici de 180°.Said set of grooves has two grooves 13 and 14 extending along two generatrices of the body 4 and here spaced apart by 180 °.

En son extrémité la plus voisine de la tête 1, la rainure 13 se prolonge par une partie courbe 15 se terminant sous la pointe de percussion 7. En son autre extrémité, la rainure 13 se raccorde à la rainure 14 par une rainure de liaison 16.At its end closest to the head 1, the groove 1 3 is extended by a curved part 15 ending under the percussion tip 7. At its other end, the groove 13 is connected to the groove 14 by a connecting groove 16.

Entre la tête 1 et la partie courbe 15 est prévu un évidement 17 séparé de cette dernière par une paroi mince 18.Between the head 1 and the curved part 15 is provided a recess 17 separated from the latter by a thin wall 18.

Des bossages de positionnement 19 et 20 sont respectivement prévus dans le fond des rainures 16 (figure 11) et 15 (figure 15).Positioning bosses 19 and 20 are respectively provided in the bottom of the grooves 16 (Figure 11) and 15 (Figure 15).

L'extrémité arrière de la partie 4 est pourvue d'une pièce caudale 21 servant d'appui, d'une part, à un obturateur 22 (par exemple tel que décrit dans une autre demande de la Demandresse) et, d'autre part, à un ressort externe 23 prenant par ailleurs appui sur une butée annulaire 24 engageant une saillie interne 25 de ladite partie 5. Un élément déformable de sécurité 26 est prévu entre l'extrémité de la pièce caudale 21 et la butée annulaire 24.The rear end of the part 4 is provided with a caudal piece 21 serving as a support, on the one hand, for a shutter 22 (for example as described in another request of the Request) and, on the other hand , to an external spring 23 also bearing on an annular stop 24 engaging an internal projection 25 of said part 5. A deformable safety element 26 is provided between the end of the tail piece 21 and the annular stop 24.

La collerette 6 comporte un évidement 27 destiné à accommoder la pointe de percussion 7 lorsque le projectile est dans l'état de la figure 1 (transport).The flange 6 has a recess 27 intended to accommodate the percussion point 7 when the projectile is in the state of FIG. 1 (transport).

L'alésage de la partie de queue 4 se prolonge par un passage correspondant 28 dans la tête 1 dont la paroi avant est pourvue d'une zone circulaire d'affaiblissement 29.The bore of the tail part 4 is extended by a corresponding passage 28 in the head 1, the front wall of which is provided with a circular weakening zone 29.

Dans la réalisation illustrée, on remarque encore un bossage 30 dans le fond de la rainure 14 et un fourneau 31 dans le corps 4 se terminant par un manchon 32.In the illustrated embodiment, there is also a boss 30 in the bottom of the groove 14 and a furnace 31 in the body 4 ending in a sleeve 32.

Le projectile susdécrit s'utilise et fonctionne de la manière suivante.The above-described projectile is used and operates in the following manner.

Dans la position de stockage-transport (figure 1) la partie 5 occupe une position angulaire, par rapport à la tête 1 et la partie 4 - telle que la pointe 7 se trouve dans le logement 27 (figure 3). Le projectile présente ainsi un encombrement minimum et sa chaîne pyrotechnique est désalignée (voir figure 2). Les parties 4 et 5 sont mutuellement verrouillées dans cette position par engagement du doigt 11 derrière un bossage 30 (figure 5) prévu sur le fond de la rainure 14.In the storage-transport position (figure 1), part 5 occupies an angular position, relative to the head 1 and part 4 - such that the point 7 is located in the housing 27 (figure 3). The projectile thus has a minimum bulk and its pyrotechnic chain is misaligned (see Figure 2). The parts 4 and 5 are mutually locked in this position by engagement of the finger 11 behind a boss 30 (FIG. 5) provided on the bottom of the groove 14.

Pour amener le projectile en position de tir (figures 4 et 5) l'utilisateur tient la tête 1 d'une main et, de l'autre, exerce une traction sur la partie 5. Le doigt 11 franchit le bossage susmentionné et parcourt la rainure '14, puis la rainure 16 au bout de laquelle il vient se placer entre les bossages 19. Avancer manuellement plus loin la partie 5 est impossible grâce à l'élément de sécurité 26. La partie de queue 5 peut maintenant recevoir le canon d'un fusil utilisé pour le lancement.To bring the projectile into the firing position (Figures 4 and 5) the user holds the head 1 with one hand and, with the other, exerts traction on the part 5. The finger 11 crosses the above-mentioned boss and traverses the groove '14, then groove 16 at the end of which it is placed between the bosses 19. Manually advancing further part 5 is impossible thanks to the safety element 26. The tail part 5 can now receive the barrel d 'a rifle used for launching.

Le lancement peut s'effectuer à l'aide d'une cartouche propulsive spéciale ou d'une cartouche ordinaire à balle.The launch can be carried out using a special propellant cartridge or an ordinary bullet cartridge.

Si le lancement s'effectue à l'aide d'une munition à balle, cette dernière traversera l'obturateur 22 qui se refermera derrière elle, ce qui empêche les gaz propulsifs de s'échapper. La balle passe la charge explosive 4 à travers du canal central, arrive dans le passage 28 de la tête 1 et s'échappe de la tête 1 par rupture de la zone 29.If the launch is carried out using a bullet ammunition, the latter will pass through the shutter 22 which will close behind it, which prevents the propellant gases from escaping. The bullet passes the explosive charge 4 through the central channel, arrives in the passage 28 of the head 1 and escapes from the head 1 by breaking the zone 29.

Au départ du coup, l'ensemble tête 1 - queue 4 reçoit toute la force propulsive et accélère par rapport à la partie de queue 5. Ceci entraîne la déformation permanente de l'élément de sécurité 26, la compression du ressort 23 et l'entrée du doigt 11 dans la rainure 13 (voir figure 12).At the start of the blow, the head 1 - tail 4 assembly receives all the propelling force and accelerates relative to the tail part 5. This results in the permanent deformation of the safety element 26, the compression of the spring 23 and the entry of finger 11 into groove 13 (see FIG. 12).

Sitôt après le départ, la partie 5 rattrape l'ensemble tête 1 - queue 4, sous l'action conjointe de la détente, du ressort 23, de la différence de poids entre les éléments prénommés (la première partie de queue étant plus légère que la seconde) et de la différence de leurs coefficients aérodynamiques respectifs.Immediately after the start, part 5 catches up with the head 1 - tail 4 assembly, under the joint action of the trigger, of spring 23, of the difference in weight between the elements named (the first part of the tail being lighter than the second) and the difference of their respective aerodynamic coefficients.

Le doigt 11 parcourt la rainure 13. Si, pendant cette phase, un obstacle était rencontré par le projectile, le doigt 11 viendrait fracturer la paroi mince -18 pour arriver dans l'évidement 17. En cette position, la mise à feu du détonateur 9 ne peut pas avoir lieu ce dernier n'étant pas aligné avec le percuteur 7. Ceci constitue la sécurité de début de trajectoire.The finger 11 runs through the groove 13. If, during this phase, an obstacle was encountered by the projectile, the finger 11 would fracture the thin wall -18 to arrive in the recess 17. In this position, the firing of the detonator 9 cannot take place, the latter not being aligned with the striker 7. This constitutes the security of start of trajectory.

Lorsque le doigt 11 pénètre dans la rainure 15, il entraîne une rotation de la partie 5 par rapport à l'ensemble 1, 4. Le projectile est maintenant dans la position des figures 13 à 16, dans laquelle la chaîne pyrotechnique est alignée. Le bossage 20 empêche toute progression ultérieure de la partie 5, jusqu'à l'impact.When the finger 11 enters the groove 15, it causes the part 5 to rotate relative to the assembly 1, 4. The projectile is now in the position of FIGS. 13 to 16, in which the pyrotechnic chain is aligned. The boss 20 prevents any further progression of the part 5, until impact.

Une très grande sensibilité à la mise à feu de la chaîne pyrotechnique, même sous des angles d'impact très faibles, est réalisée grâce à la forme extérieure de la tête 1, qui s'accroche plus facilement à l'obstacle.Very high sensitivity to firing of the pyrotechnic chain, even at very low impact angles, is achieved thanks to the external shape of the head 1, which hooks more easily to the obstacle.

La sensibilité est encore augmentée grâce à la masse élevée de la partie 5, portant dans la collerette 6 le détonateur 9. Cette masse élevée est mise en mouvement lors de l'impact du projectile et communique toute son énergie au détonateur quand celui-ci frappe le percuteur 7.The sensitivity is further increased thanks to the high mass of part 5, carrying in the collar 6 the detonator 9. This high mass is set in motion upon impact of the projectile and communicates all of its energy to the detonator when it strikes the striker 7.

Après mise à feu de la chaîne pyrotechnique, la partie de queue 5 donne naissance à une quantité de fragments, sous l'effet de la détonation de la charge explosive 4.After firing the pyrotechnic chain, the tail part 5 gives rise to a quantity of fragments, under the effect of the detonation of the explosive charge 4.

Pour plus de sécurité encore, une paroi mince fracturable pourrait être prévue dans la rainure 16.For even greater security, a thin fracturable wall could be provided in the groove 16.

Dans l'exemple de réalisation susdécrit, l'utilisateur a besoin de ses deux mains pour amener le projectile en position de tir, puisqu'il doit tenir la tête 1 d'une main et la partie 5 de l'autre. Ceci peut être évité avec la variante de réalisation représentée aux figures 17-19, dans lesquelles les éléments identiques ou équivalents à ceux des figures 1-16 conservent les mêmes références.In the embodiment described above, the user needs both hands to bring the projectile into the firing position, since he must hold the head 1 with one hand and the part 5 with the other. This can be avoided with the variant embodiment shown in Figures 17-19, in which the elements identical or equivalent to those of FIGS. 1-16 retain the same references.

Cette variante se différencie essentiellement de la précédente par les mesures constructives suivantes :

  • - la rainure de liaison 16 est omise;
  • - la collerette ,6 contient une bague 33 à lumière 34 oblongue et portant deux doigts décalés de 180°, respectivement 35 et 36;
  • - le manchon 32 est pourvu d'une rampe 37;
  • - la bague 33 est pourvue d'une saillie 38 destinée à prendre appui sur la partie avant de la queue 5.
This variant differs essentially from the previous one by the following constructive measures:
  • - The connecting groove 16 is omitted;
  • - The collar, 6 contains a ring 33 with light 34 oblong and carrying two fingers offset by 180 °, respectively 35 and 36;
  • - the sleeve 32 is provided with a ramp 37;
  • the ring 33 is provided with a projection 38 intended to bear on the front part of the tail 5.

Durant le stockage et le transport, la saillie 38 est engagée dans son logement, de sorte que le doigt 35 de la bague 33 se trouve engagé dans la rainure 14, le doigt 36 surplombant la rainure 13.During storage and transport, the projection 38 is engaged in its housing, so that the finger 35 of the ring 33 is engaged in the groove 14, the finger 36 overhanging the groove 13.

Pour préparer le projectile au lancement, il suffit de le prendre à l'état télescopé et d'y enfoncer le canon de l'arme utilisée pour le lancement. Ceci a pour effet d'amener le projectile dans la position de la figure 17, le doigt 35 venant buter contre la rampe 37.To prepare the projectile for launching, it is enough to take it in the telescoped state and to insert in it the barrel of the weapon used for launching. This has the effect of bringing the projectile into the position of FIG. 17, the finger 35 abutting against the ramp 37.

Au moment du tir, l'inertie cause la compression du ressort 23, le refoulement du doigt 35 hors de la rainure 14 avec rupture de la saillie 38 et pénétration du doigt 36 dans la rainure 13. Le projectile se comporte ensuite comme dans l'exemple précédent.When firing, the inertia causes the compression of the spring 23, the repression of the finger 35 out of the groove 14 with rupture of the projection 38 and penetration of the finger 36 in the groove 13. The projectile then behaves as in the previous example.

Il est évident que de nombreuses modifications peuvent être apportées à l'exemple susdécrit, sans pour autant sortir du cadre de l'invention.It is obvious that many modifications can be made to the example described above, without going beyond the ambit of the invention.

Ainsi, la présence du ressort 23 n'est pas indispensable si les formes et poids des éléments sont judicieusement choisis.Thus, the presence of the spring 23 is not essential if the shapes and weights of the elements are judiciously chosen.

Claims (15)

l.- Projectile ayant une tête prolongée par une queue tubulaire et contenant une charge explosive ainsi qu'une chaine de mise à feu de cette dernière, caractérisé en ce que ladite queue (2) est réalisée en deux parties tubulaires télescopiques dont l'une (4) est solidaire de ladite tête (1) et porte avec cette dernière une première partie de ladite chaîne de mise a feu et dont l'autre (5) porte la partie restante de cette dernière, des moyens de guidage étant répartis sur lesdites deux parties afin de leur assigner une position angulaire déterminée, en fonction de leur position axiale relative.l.- Projectile having a head extended by a tubular tail and containing an explosive charge as well as a firing chain of the latter, characterized in that said tail (2) is made of two telescopic tubular parts, one of which (4) is integral with said head (1) and carries with the latter a first part of said firing chain and the other (5) of which carries the remaining part of the latter, guide means being distributed over said two parts in order to assign them a determined angular position, as a function of their relative axial position. 2.- Projectile selon la revendication 1, caractérisé en ce que la partie de queue (4) solidaire de la tête (1) est principalement constituée par une charge explosive.2.- Projectile according to claim 1, characterized in that the tail part (4) integral with the head (1) consists mainly of an explosive charge. 3.- Projectile selon la revendication 2, caractérisé en ce que l'autre partie (5) de la queue est susceptible de coulisser autour de la première nommée (4) et est réalisée en métal préfragmenté.3.- Projectile according to claim 2, characterized in that the other part (5) of the tail is capable of sliding around the first named (4) and is made of prefragmented metal. 4.- Projectile selon la revendication 1, caractérisé en ce que la première partie de la chaîne de mise à feu est constituée par un percuteur (7) solidaire de la partie arrière de ladite tête (1) ainsi que par un relais secondaire (8) noyé dans ladite charge explosive, tandis que la partie restante de la chaîne est constituée par un détonnateur (9) et un relais primaire (10), portés par l'autre partie (5) de la queue.4.- Projectile according to claim 1, characterized in that the first part of the firing chain is constituted by a striker (7) secured to the rear part of said head (1) as well as by a secondary relay (8 ) embedded in said explosive charge, while the remaining part of the chain consists of a detonator (9) and a primary relay (10), carried by the other part (5) of the tail. 5.- Projectile selon la revendication 1, caractérisé en ce que lesdits moyens de guidage sont constitués, d'une part, par au moins une rainure (13, 14) prévue dans l'une partie de la queue et, d'autre part, par au moins un doigt (11) porté par l'autre partie de cette dernière.5.- Projectile according to claim 1, characterized in that said guide means are constituted, on the one hand, by at least one groove (13, 14) provided in one part of the tail and, on the other hand , by at least one finger (11) carried by the other part of the latter. 6.- Projectile selon la revendication 5, caractérisé en ce que lesdits moyens de guidage comportent deux rainures (13, 14) s'étendant selon deux génératrices de la partie de queue correspondante (4), une extrémité de l'une desdites rainures (13) étant prolongée par une rainure courbe (14) au voisinage de la tête (1) du projectile.6.- Projectile according to claim 5, characterized in that said guide means comprise two grooves (13, 14) extending along two generatrices of the corresponding tail part (4), one end of one of said grooves ( 13) being extended by a curved groove (14) in the vicinity of the head (1) of the projectile. 7.- Projectile selon la revendication 6, caractérisé en ce qu'entre ladite rainure courbe (15) et ladite tête (1) est prévu un évidement (17) séparé de ladite courbe par une paroi mince (18).7.- Projectile according to claim 6, characterized in that between said curved groove (15) and said head (1) is provided a recess (17) separated from said curve by a thin wall (18). 8.- Projectile selon la revendication 6, caractérisé en ce qu'il comporte un doigt (11), une rainure de liaison (16) mettant en communication mutuelle les extrémités desdites deux rainures (13, 14) les plus éloignées de ladite tête (1) du projectile.8.- Projectile according to claim 6, characterized in that it comprises a finger (11), a connecting groove (16) putting in communication the ends of said two grooves (13, 14) furthest from said head ( 1) of the projectile. 9.- Projectile selon la revendication 5, caractérisé en ce que ledit doigt (11) est monté sur ressort (12), des bossages (19, 20, 30) de positionnement étant prévus dans lesdites rainures (14, 15, 16).9.- Projectile according to claim 5, characterized in that said finger (11) is mounted on a spring (12), bosses (19, 20, 30) for positioning being provided in said grooves (14, 15, 16). 10.- Projectile selon la revendication 6, caractérisé en ce qu'il comporte deux doigts (35, 36) portés par une bague (33) captive de ladite autre partie de la queue mais susceptible d'être déplacée perpendiculairement à l'axe de cette dernière.10.- Projectile according to claim 6, characterized in that it comprises two fingers (35, 36) carried by a ring (33) captive of said other part of the tail but capable of being displaced perpendicular to the axis of the latter. 11.- Projectile selon la revendication lO, caractérisé en ce que le déplacement de ladite bague (33) est assuré, lors de l'amenée en position de lancement du projectile, par la coopération de deux plans inclinés complémentaires, l'un présenté par l'un (35) desdits doigts et l'autre (37) par une collerette terminale de ladite première partie.11.- Projectile according to claim lO, characterized in that the displacement of said ring (33) is ensured, during the bringing into the launching position of the projectile, by the cooperation of two complementary inclined planes, one presented by one (35) of said fingers and the other (37) by an end flange of said first part. 12.- Projectile selon la revendication 1, caractérisé en ce que la partie arrière de la première partie de queue (4) porte un moyen élastique (23) destiné à refouler la deuxième partie de queue (5) vers ladite tête (1).12.- Projectile according to claim 1, characterized in that the rear part of the first tail part (4) carries an elastic means (23) intended to push the second tail part (5) towards said head (1). 13.- Projectile selon la revendication 12, caractérisé en ce qu'un moyen de sécurité (26), écrasable ou fragmentable sous l'effet du départ, est prévu afin de ne permettre l'entrée en fonction dudit moyen élastique (23) qu'après le départ du projectile.13.- Projectile according to claim 12, characterized in that a safety means (26), crushable or fragmentable under the effect of departure, is provided so as to allow the entry into function of said elastic means (23) only after the projectile has left. 14.- Projectile selon la revendication 1, caractérisé en ce que l'ensemble constitué par la tête (1) et la première partie de queue (4) est plus léger que l'autre partie de queue (5).14.- Projectile according to claim 1, characterized in that the assembly constituted by the head (1) and the first tail part (4) is lighter than the other tail part (5). 15.- Projectile selon la revendication 1, caractérisé en ce que l'ensemble constitué par la tête (1) et la première partie de queue (4) présente un coefficient aérodynamique moins favorable que celui de la deuxième partie de queue (5).15.- Projectile according to claim 1, characterized in that the assembly constituted by the head (1) and the first tail part (4) has a less favorable aerodynamic coefficient than that of the second tail part (5).
EP80201098A 1979-11-30 1980-11-20 Telescopic projectile Expired EP0030052B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80201098T ATE4841T1 (en) 1979-11-30 1980-11-20 TELESCOPIC PROJECTILE.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
BE2058240 1979-11-30
BE2/58240A BE880348A (en) 1979-11-30 1979-11-30 TELESCOPIC PROJECTILE
BE2058794 1980-10-10
BE2058794 1980-10-10

Publications (2)

Publication Number Publication Date
EP0030052A1 true EP0030052A1 (en) 1981-06-10
EP0030052B1 EP0030052B1 (en) 1983-09-28

Family

ID=25661741

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80201098A Expired EP0030052B1 (en) 1979-11-30 1980-11-20 Telescopic projectile

Country Status (4)

Country Link
US (1) US4448129A (en)
EP (1) EP0030052B1 (en)
BE (1) BE885618R (en)
DE (1) DE3065083D1 (en)

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BE905563A (en) * 1986-10-07 1987-04-07 Herstal Sa TELESCOPIC GRENADE.
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WO1996010159A1 (en) * 1992-10-25 1996-04-04 Etzion Metal Works A device for preventing accidental discharging of a bullet from a firearm
IL122886A (en) 1998-01-09 2001-01-11 Mofet Etzion Device for preventing the accidental discharge of a bullet from a firearm
NO995142A (en) * 1999-06-04 2000-10-16 Nammo Raufoss As Propulsion device for a projectile in a missile
US6289623B1 (en) 1999-06-21 2001-09-18 Mofet Etzion Agricultural Association Ltd. Device for reducing the danger of harm caused by accidental discharge of a bullet from a firearm
US6581521B1 (en) 2002-08-26 2003-06-24 Robert G. Dixon Reusable gas grenade canister
US7380504B2 (en) * 2005-08-16 2008-06-03 Raytheon Company Telescoped projectile
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WO2008118235A2 (en) * 2006-12-20 2008-10-02 Ruhlman James D Reduced collateral damage bomb (rcdb) including fuse system with shaped charges and a system and method of making same

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Also Published As

Publication number Publication date
US4448129A (en) 1984-05-15
DE3065083D1 (en) 1983-11-03
BE885618R (en) 1981-04-10
EP0030052B1 (en) 1983-09-28

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