EP0775887B1 - Retainer for the case of an explosive charge - Google Patents

Retainer for the case of an explosive charge Download PDF

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Publication number
EP0775887B1
EP0775887B1 EP96402312A EP96402312A EP0775887B1 EP 0775887 B1 EP0775887 B1 EP 0775887B1 EP 96402312 A EP96402312 A EP 96402312A EP 96402312 A EP96402312 A EP 96402312A EP 0775887 B1 EP0775887 B1 EP 0775887B1
Authority
EP
European Patent Office
Prior art keywords
retainer
casing
chamber
case
skirt
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
EP96402312A
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German (de)
French (fr)
Other versions
EP0775887A1 (en
Inventor
Frédéric Barreau
Jean-Claude Lacote
Michel Hossard
Laurent Deguen
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.)
Giat Industries SA
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Giat Industries SA
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Filing date
Publication date
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Publication of EP0775887A1 publication Critical patent/EP0775887A1/en
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Publication of EP0775887B1 publication Critical patent/EP0775887B1/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
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/38—Separately-loaded propellant charges, e.g. cartridge bags

Definitions

  • the technical field of the invention is that of retainers for artillery propellant charge case.
  • Artillery propellant charges are today constituted by a case, made of combustible material, and inside which is placed a propellant powder in loose or in bundles.
  • the case of propellant charge may slip at least partially out of the room before it is closed by the firing plate, thus disturbing the closing and being able cause shooting incidents.
  • This hollow or this cylindrical surface are delimited on the side of the shooting plate by a surface of support which retains the propellant charge inside bedroom.
  • the retainer according to the invention is carried by the case itself and it ensures the axial maintenance of the holster in the gun chamber even when the holster is finds coaxial in the room.
  • the retainer according to the invention ensures such maintenance whatever the geometry of the room, especially even if the room of the weapon is deprived of means of maintenance.
  • the subject of the invention is a stopper for a case propellant charge, case comprising an envelope cylindrical intended to contain a propellant charge and to be introduced into the chamber of a weapon, retainer characterized in that it comprises a skirt, continuous or formed of several sectors, skirt of diameter greater than that of the envelope and that of the bedroom and intended for be attached to the case by connecting means, this skirt deforming when the case is introduced into the weapon chamber so as to maintain the holster in the bedroom.
  • the retainer has a tubular portion intended for surround the envelope of the case, tubular portion which carries the means of connection.
  • connection means may include at least one cylindrical bead carried by the tubular portion and intended to cooperate with a complementary bead worn by the envelope of the case.
  • the tubular portion may include at least two slots regularly distributed angularly and allowing the establishment by elastic deformation of the bead of the retainer on the bead of the envelope.
  • the bead of the retainer may have an external diameter substantially equal to the diameter from the gun room.
  • the retainer has at least one substantially flat face normal to the axis of the skirt, face up intended to be applied against a bottom of the case and carrying the means of liaison.
  • connection means may include at least two tabs cut on the flat face and intended for cooperate with notches carried by the bottom of the case.
  • the retainer according to the invention will be made of a combustible material.
  • the invention also relates to a case for charging propellant provided with such a retainer whether it is removable or no.
  • a stopper 1 according to a first embodiment of the invention comprises a tubular portion 2 extended by a skirt 3.
  • the tubular portion 2 is intended to surround the casing of a propellant charge case (not shown) and its internal diameter is therefore substantially equal to outer diameter of the case.
  • the skirt 3 has an outer diameter greater than that of the tubular portion 2. It has a slightly conical shape flared towards a rear part (AR) of the retainer.
  • the tubular portion 2 carries a cylindrical bead 4 as well as 5 longitudinal slots, regularly distributed angularly, and arranged so as to give a some radial elasticity to tubular portion 2, to bead level 4.
  • This stopper is made of a combustible material, such as cardboard with or without nitrocellulose, and it is intended to be fixed to a propellant charge case 6 as shown in Figures 2a and 2b.
  • the case 6 comprises a closed cylindrical envelope 7 by a bottom 11 and intended to contain a propellant charge 8.
  • the case 6 is intended to be introduced into the chamber 9 of a weapon (not shown in detail).
  • Envelope and bottom are made of material combustible.
  • the cylindrical envelope 7 also carries a bead 10, which may be continuous over the entire circumference of the envelope or discontinuous.
  • the bead 4 of the retainer constitutes a means of connection between the retainer and the case 6.
  • the slots 5 allow the radial deformation of the tubular part 2, thus allowing the passage of the bead 10 of the envelope. The latter comes to lodge in the hollow formed by the inside of the bead 4 of the retainer 1.
  • the propellant charge case 6 carrying the retainer 1 is introduced into chamber 9 of the weapon with preferably an orientation such that the bead 4 enters the chamber before skirt 3, this in order to facilitate the introduction of the retainer in the room.
  • Figure 2b shows the case after its installation in room 9.
  • the skirt 3 is defined so that its diameter external is greater than the diameter of the chamber 9.
  • the stopper 1 deforms inside the chamber and the skirt 3 is in contact with the surface internal cylindrical 12 of chamber 9.
  • the elastic radial deformation of the skirt ensures the maintaining contact between the retainer and the chamber.
  • This contact generates friction forces and of adhesion which allow the axial retention of the case in the weapon chamber when the latter is strongly tilted.
  • the bead 4 will be given a diameter outer substantially equal to the diameter of the chamber 9 of tear.
  • Such a retainer can be permanently fixed to the case.
  • Figures 3a and 3b show a stopper 1 along a second embodiment of the invention.
  • this retainer includes a skirt 3 having a slightly conical shape flared towards a part rear AR of the retainer.
  • the skirt is connected to a substantially flat face 13 and normal to the axis 14 of the skirt.
  • the flat face 13 is cut out and carries three tabs 15 regularly distributed angularly
  • This stopper is made of a combustible material, such as cardboard with or without nitrocellulose, and it is intended to be fixed to a propellant charge case 6 as shown in figure 4.
  • the flat face 13 of the support 1 is applied against a bottom 11 of case 6.
  • the diameter of the skirt 3 is greater than that of the envelope of the case 6 and it is also chosen greater than the diameter of the chamber of the weapon.
  • the bottom of the case has three notches 16, regularly distributed angularly, and intended to receive the tabs 15 of the retainer.
  • the tongues 15 thus constitute a connecting means retainer and case.
  • the bottom 11 of the case will be preferably made of a combustible material.
  • the shape of the bottom is obtained by stamping a sheet of material combustible, such as a cardboard loaded with nitrocellulose.
  • the propellant charge case 6 carrying the retainer 1 is introduced into chamber 9 of the weapon with an orientation as shown in Figures 5a and 5b, i.e. with the skirt 3 entering the chamber 9 after the case 6 himself.
  • Figure 5b shows the case after its installation in room 9.
  • the skirt 3 is defined so that its diameter external is greater than the diameter of the chamber 9.
  • the stopper 1 deforms inside the chamber and the skirt 3 is in contact with the surface internal cylindrical 12 of chamber 9.
  • the elastic radial deformation of the skirt 3 ensures the maintaining contact between the retainer and the chamber.
  • This contact generates friction forces and of adhesion which allow the axial retention of the case in the weapon chamber when the latter is strongly tilted.
  • the support of the skirt on the chamber causes a elastic deformation of the flat face 13 maintained by the notches 16, causing a bracing of the skirt which has to increase the contact pressure between the skirt and the chamber, therefore the rigidity of the axial support.
  • This variant of the invention ensures a holding the case for cases with an external diameter is close to that of the gun chamber.
  • the skirt In practice, we will give the skirt a slope of the order 20%, the length in contact with the chamber can be on the order of 0.1 times the diameter of the chamber.
  • the retainer can be fixed so permanent on the case, but it can also be separated easily from it and can only be put in place last moment depending on operational needs.
  • the stopper can be made by fragmentable plastic during firing, for example in High density polyethylene or Polyamide. We will provide the if necessary, initiations of ruptures on the retainer for facilitate its destruction during firing.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Description

Le domaine technique de l'invention est celui des arrêtoirs pour étui de charge propulsive d'artillerie.The technical field of the invention is that of retainers for artillery propellant charge case.

Les charges propulsives d'artillerie sont aujourd'hui constituées par un étui, réalisé en matériau combustible, et à l'intérieur duquel est placée une poudre propulsive en vrac ou en fagot.Artillery propellant charges are today constituted by a case, made of combustible material, and inside which is placed a propellant powder in loose or in bundles.

Ces étuis sont destinés à être introduits à l'intérieur de la chambre d'une arme, à la suite d'un projectile.These cases are intended to be inserted inside from the chamber of a weapon, following a projectile.

Lorsque l'arme est réglée de façon à tirer avec un angle de site important (de l'ordre de 45°), l'étui de charge propulsive risque de glisser au moins partiellement hors de la chambre avant que celle-ci soit fermée par la plaque de tir, perturbant ainsi la fermeture et pouvant causer des incidents de tir.When the weapon is adjusted to fire with a large angle of elevation (of the order of 45 °), the case of propellant charge may slip at least partially out of the room before it is closed by the firing plate, thus disturbing the closing and being able cause shooting incidents.

Les solutions connues permettant d'éviter la sortie de la charge propulsive hors de la chambre prévoient généralement des usinages particuliers de la chambre.Known solutions to avoid the exit of propellant charge out of the room plan generally specific machining of the room.

On réalise ainsi le plus souvent un creux (appelé cuillère) ou un usinage cylindrique légèrement désaxé par rapport à la chambre. Ce creux ou cette surface cylindrique sont délimités du côté de la plaque de tir par une surface d'appui qui retient la charge propulsive à l'intérieur de la chambre.This is most often a hollow (called spoon) or a cylindrical machining slightly offset by report to the room. This hollow or this cylindrical surface are delimited on the side of the shooting plate by a surface of support which retains the propellant charge inside bedroom.

De telles solutions sont bien adaptées au maintien des charges propulsives en sacs souples. Elles sont par contre inefficaces pour maintenir les étuis cylindriques actuels dont la rigidité est telle qu'elle assure leur positionnement d'une façon sensiblement coaxiale à la chambre, interdisant ainsi leur appui dans le creux ou la cuillère de maintien.Such solutions are well suited to maintaining propellant charges in flexible bags. They are however ineffective in maintaining current cylindrical cases whose rigidity is such that it ensures their positioning substantially coaxially to the chamber, thus prohibiting their support in the hollow or the holding spoon.

C'est le but de l'invention que de proposer un arrêtoir pour un étui de charge propulsive qui ne présente pas de tels inconvénients.It is the object of the invention to propose a retainer for a propellant charge case that has no such disadvantages.

Ainsi, l'arrêtoir selon l'invention est porté par l'étui lui même et il permet d'assurer le maintien axial de l'étui dans la chambre de l'arme même lorsque l'étui se trouve coaxial à la chambre. Thus, the retainer according to the invention is carried by the case itself and it ensures the axial maintenance of the holster in the gun chamber even when the holster is finds coaxial in the room.

Du fait de sa solidarisation avec l'étui, l'arrêtoir selon l'invention assure un tel maintien quelle que soit la géométrie de la chambre, en particulier même si la chambre de l'arme est dépourvue de moyens de maintien.Due to its attachment to the case, the retainer according to the invention ensures such maintenance whatever the geometry of the room, especially even if the room of the weapon is deprived of means of maintenance.

C'est un autre but de l'invention que de fournir un arrêtoir amovible pouvant être fixé ou non à l'étui en fonction des besoins.It is another object of the invention to provide a removable retainer which can be fixed or not to the case in according to needs.

Ainsi l'invention a pour objet un arrêtoir pour un étui de charge propulsive, étui comprenant une enveloppe cylindrique destinée à contenir une charge propulsive et à être introduite dans la chambre d'une arme, arrêtoir caractérisé en ce qu'il comporte une jupe, continue ou formée de plusieurs secteurs, jupe de diamètre supérieur à celui de l'enveloppe et à celui de la chambre et destinée à être fixée à l'étui par des moyens de liaison, cette jupe se déformant lors de l'introduction de l'étui dans la chambre de l'arme de façon à assurer un maintien de l'étui dans la chambre.Thus, the subject of the invention is a stopper for a case propellant charge, case comprising an envelope cylindrical intended to contain a propellant charge and to be introduced into the chamber of a weapon, retainer characterized in that it comprises a skirt, continuous or formed of several sectors, skirt of diameter greater than that of the envelope and that of the bedroom and intended for be attached to the case by connecting means, this skirt deforming when the case is introduced into the weapon chamber so as to maintain the holster in the bedroom.

Selon un premier mode de réalisation de l'invention, l'arrêtoir comporte une portion tubulaire destinée à entourer l'enveloppe de l'étui, portion tubulaire qui porte les moyens de liaison.According to a first embodiment of the invention, the retainer has a tubular portion intended for surround the envelope of the case, tubular portion which carries the means of connection.

Les moyens de liaison pourront comprendre au moins un bourrelet cylindrique porté par la portion tubulaire et destiné à coopérer avec un bourrelet complémentaire porté par l'enveloppe de l'étui.The connection means may include at least one cylindrical bead carried by the tubular portion and intended to cooperate with a complementary bead worn by the envelope of the case.

La portion tubulaire pourra comporter au moins deux fentes régulièrement réparties angulairement et permettant la mise en place par déformation élastique du bourrelet de l'arrêtoir sur le bourrelet de l'enveloppe.The tubular portion may include at least two slots regularly distributed angularly and allowing the establishment by elastic deformation of the bead of the retainer on the bead of the envelope.

Avantageusement, le bourrelet de l'arrêtoir pourra présenter un diamètre externe sensiblement égal au diamètre de la chambre de l'arme.Advantageously, the bead of the retainer may have an external diameter substantially equal to the diameter from the gun room.

Selon un deuxième mode de réalisation de l'invention, l'arrêtoir comporte au moins une face plane sensiblement normale à l'axe de la jupe, face place destinée à être appliquée contre un fond de l'étui et portant les moyens de liaison.According to a second embodiment of the invention, the retainer has at least one substantially flat face normal to the axis of the skirt, face up intended to be applied against a bottom of the case and carrying the means of liaison.

Les moyens de liaison pourront comprendre au moins deux languettes découpées sur la face plane et destinées à coopérer avec des crans portés par le fond de l'étui.The connection means may include at least two tabs cut on the flat face and intended for cooperate with notches carried by the bottom of the case.

De préférence, l'arrêtoir selon l'invention sera réalisé en un matériau combustible.Preferably, the retainer according to the invention will be made of a combustible material.

L'invention a également pour objet un étui pour charge propulsive muni d'un tel arrêtoir qu'il soit amovible ou non.The invention also relates to a case for charging propellant provided with such a retainer whether it is removable or no.

L'invention sera mieux comprise à la lecture de la description qui va suivre de modes particuliers de réalisation, description faite en référence aux dessins annexés et dans lesquels:

  • la figure 1 représente en demi-vue / demi-coupe axiale un arrêtoir selon un premier mode de réalisation de l'invention,
  • les figures 2a et 2b représentent en demi-coupe cet arrêtoir mis en place sur un étui de charge propulsive et respectivement avant et après introduction dans la chambre d'une arme,
  • les figures 3a et 3b représentent un arrêtoir selon un deuxième mode de réalisation de l'invention, la figure 3a étant une vue frontale et la figure 3b une coupe axiale de la précédente suivant le plan AA,
  • la figure 4 montre cet arrêtoir mis en place sur un étui de charge propulsive,
  • les figures 5a et 5b représentent en demi-coupe cet arrêtoir mis en place sur un étui de charge propulsive et respectivement avant et après introduction dans la chambre d'une arme.
The invention will be better understood on reading the description which follows of particular embodiments, description made with reference to the appended drawings and in which:
  • FIG. 1 shows a half-view / axial half-section of a retainer according to a first embodiment of the invention,
  • FIGS. 2a and 2b show in half-section this retainer put in place on a propellant charge case and respectively before and after introduction into the chamber of a weapon,
  • FIGS. 3a and 3b represent a stopper according to a second embodiment of the invention, FIG. 3a being a front view and FIG. 3b an axial section of the previous one along the plane AA,
  • FIG. 4 shows this retainer put in place on a propellant charge case,
  • Figures 5a and 5b show in half-section this retainer set up on a propellant charge case and respectively before and after introduction into the chamber of a weapon.

Si on se reporte à la figure 1, un arrêtoir 1 selon un premier mode de réalisation de l'invention comporte une portion tubulaire 2 prolongée par une jupe 3.If we refer to Figure 1, a stopper 1 according to a first embodiment of the invention comprises a tubular portion 2 extended by a skirt 3.

La portion tubulaire 2 est destinée à entourer l'enveloppe d'un étui de charge propulsive (non représenté) et son diamètre interne est donc sensiblement égal au diamètre extérieur de l'étui. The tubular portion 2 is intended to surround the casing of a propellant charge case (not shown) and its internal diameter is therefore substantially equal to outer diameter of the case.

La jupe 3 a un diamètre externe supérieur à celui de la portion tubulaire 2. Elle a une forme légèrement conique évasée vers une partie arrière (AR) de l'arrêtoir.The skirt 3 has an outer diameter greater than that of the tubular portion 2. It has a slightly conical shape flared towards a rear part (AR) of the retainer.

La portion tubulaire 2 porte un bourrelet cylindrique 4 ainsi que des fentes 5 longitudinales, régulièrement réparties angulairement, et disposées de façon à donner une certaine élasticité radiale à la portion tubulaire 2, au niveau du bourrelet 4.The tubular portion 2 carries a cylindrical bead 4 as well as 5 longitudinal slots, regularly distributed angularly, and arranged so as to give a some radial elasticity to tubular portion 2, to bead level 4.

Cet arrêtoir est réalisé en un matériau combustible, tel un carton chargé ou non de nitrocellulose, et il est destiné à être fixé à un étui 6 de charge propulsive comme représenté aux figures 2a et 2b.This stopper is made of a combustible material, such as cardboard with or without nitrocellulose, and it is intended to be fixed to a propellant charge case 6 as shown in Figures 2a and 2b.

L'étui 6 comporte une enveloppe cylindrique 7 fermée par un fond 11 et destinée à contenir une charge propulsive 8. L'étui 6 est destiné à être introduit dans la chambre 9 d'une arme (non représentée en détails).The case 6 comprises a closed cylindrical envelope 7 by a bottom 11 and intended to contain a propellant charge 8. The case 6 is intended to be introduced into the chamber 9 of a weapon (not shown in detail).

Enveloppe et fond sont réalisés en matériau combustible.Envelope and bottom are made of material combustible.

L'enveloppe cylindrique 7 porte elle aussi un bourrelet 10, qui pourra être continu sur toute la circonférence de l'enveloppe ou bien discontinu.The cylindrical envelope 7 also carries a bead 10, which may be continuous over the entire circumference of the envelope or discontinuous.

Le bourrelet 4 de l'arrêtoir constitue un moyen de liaison entre l'arrêtoir et l'étui 6.The bead 4 of the retainer constitutes a means of connection between the retainer and the case 6.

On fixe l'arrêtoir à l'étui en le faisant coulisser sur l'enveloppe 7 de ce dernier.We fix the retainer to the case by sliding it on envelope 7 of the latter.

Les fentes 5 autorisent la déformation radiale de la partie tubulaire 2, permettant ainsi le passage du bourrelet 10 de l'enveloppe. Ce dernier vient se loger dans le creux formé par l'intérieur du bourrelet 4 de l'arrêtoir 1.The slots 5 allow the radial deformation of the tubular part 2, thus allowing the passage of the bead 10 of the envelope. The latter comes to lodge in the hollow formed by the inside of the bead 4 of the retainer 1.

L'étui de charge propulsive 6 portant l'arrêtoir 1 est introduit dans la chambre 9 de l'arme avec de préférence une orientation telle que le bourrelet 4 pénètre dans la chambre avant la jupe 3, cela afin de faciliter l'introduction de l'arrêtoir dans la chambre.The propellant charge case 6 carrying the retainer 1 is introduced into chamber 9 of the weapon with preferably an orientation such that the bead 4 enters the chamber before skirt 3, this in order to facilitate the introduction of the retainer in the room.

La figure 2b montre l'étui après sa mise en place dans la chambre 9. Figure 2b shows the case after its installation in room 9.

La jupe 3 est définie de telle sorte que son diamètre externe soit supérieur au diamètre de la chambre 9.The skirt 3 is defined so that its diameter external is greater than the diameter of the chamber 9.

Ainsi, l'arrêtoir 1 se déforme à l'intérieur de la chambre et la jupe 3 est en contact avec la surface cylindrique interne 12 de la chambre 9.Thus, the stopper 1 deforms inside the chamber and the skirt 3 is in contact with the surface internal cylindrical 12 of chamber 9.

La déformation radiale élastique de la jupe assure le maintien du contact entre l'arrêtoir et la chambre.The elastic radial deformation of the skirt ensures the maintaining contact between the retainer and the chamber.

Ce contact engendre des efforts de frottement et d'adhérence qui permettent le maintien axial de l'étui dans la chambre de l'arme lorsque cette dernière est fortement inclinée.This contact generates friction forces and of adhesion which allow the axial retention of the case in the weapon chamber when the latter is strongly tilted.

On définira la longueur de la jupe 3 de façon à assurer des frottements suffisants. Pratiquement on donnera à la jupe une longueur en contact avec la chambre de l'ordre de 0,1 fois le diamètre de la chambre.We will define the length of the skirt 3 so as to ensure sufficient friction. In practice, we will give the skirt a length in contact with the room in the order of 0.1 times the diameter of the chamber.

Avantageusement on donnera au bourrelet 4 un diamètre externe sensiblement égal au diamètre de la chambre 9 de l'arme.Advantageously, the bead 4 will be given a diameter outer substantially equal to the diameter of the chamber 9 of tear.

Une telle disposition permet de guider l'étui 6 par rapport à la chambre. On assure ainsi une coaxialité de l'étui 6 et de la chambre au niveau de l'arrêtoir 1, ce qui permet une déformation sensiblement symétrique de la jupe par la chambre, donc une symétrie des efforts de maintien.Such an arrangement makes it possible to guide the case 6 by report to the room. This ensures a coaxiality of the case 6 and the chamber at the stop 1, which allows a substantially symmetrical deformation of the skirt by the chamber, therefore a symmetry of the holding forces.

Le contact du bourrelet 4 et de la chambre permet également de verrouiller l'arrêtoir sur l'étui. Il n'y a alors aucun risque de voir l'arrêtoir de séparer de l'étui au moment de l'introduction dans la chambre ou de le voir se désolidariser par un effet d'arc-boutement.Contact between the bead 4 and the chamber allows also to lock the retainer on the case. There is then there is no risk of the retainer separating from the case upon entering the room or seeing it disassociate by a bracing effect.

Un tel arrêtoir peut être fixé de façon permanente sur l'étui.Such a retainer can be permanently fixed to the case.

Il peut également être séparé facilement de l'étui et n'être mis en place qu'au dernier moment en fonction des besoins opérationnels.It can also be easily separated from the case and only be implemented at the last moment according to the operational needs.

Diverses variantes de ce mode de réalisation sont possibles.Various variations of this embodiment are possible.

Ainsi on peut prévoir un arrêtoir réalisé en matière plastique fragmentable lors du tir, par exemple en Polyéthylène Haute densité ou en Polyamide. On prévoira le cas échéant des amorces de ruptures sur l'arrêtoir pour faciliter sa destruction lors du tir.So we can provide a stopper made of fragmentable plastic when fired, for example in High density polyethylene or Polyamide. We will provide the if necessary, initiations of ruptures on the retainer for facilitate its destruction during firing.

On peut également définir un arrêtoir dont la jupe n'est pas continue mais formée de plusieurs secteurs (ou doigts) régulièrement répartis angulairement.We can also define a retainer whose skirt is not continuous but formed of several sectors (or fingers) regularly distributed angularly.

Les figures 3a et 3b montrent un arrêtoir 1 selon un deuxième mode de réalisation de l'invention.Figures 3a and 3b show a stopper 1 along a second embodiment of the invention.

Comme le précédent, cet arrêtoir comporte une jupe 3 ayant une forme légèrement conique évasée vers une partie arrière AR de l'arrêtoir.Like the previous one, this retainer includes a skirt 3 having a slightly conical shape flared towards a part rear AR of the retainer.

La jupe est reliée à une face 13 sensiblement plane et normale à l'axe 14 de la jupe.The skirt is connected to a substantially flat face 13 and normal to the axis 14 of the skirt.

La face plane 13 est découpée et porte trois languettes 15 régulièrement réparties angulairementThe flat face 13 is cut out and carries three tabs 15 regularly distributed angularly

Cet arrêtoir est réalisé en un matériau combustible, tel un carton chargé ou non de nitrocellulose, et il est destiné à être fixé à un étui 6 de charge propulsive comme représenté à la figure 4.This stopper is made of a combustible material, such as cardboard with or without nitrocellulose, and it is intended to be fixed to a propellant charge case 6 as shown in figure 4.

La face plane 13 du support 1 est appliquée contre un fond 11 de l'étui 6.The flat face 13 of the support 1 is applied against a bottom 11 of case 6.

Le diamètre de la jupe 3 est supérieur à celui de l'enveloppe de l'étui 6 et il est également choisi supérieur au diamètre de la chambre de l'arme.The diameter of the skirt 3 is greater than that of the envelope of the case 6 and it is also chosen greater than the diameter of the chamber of the weapon.

Le fond de l'étui porte trois crans 16, régulièrement répartis angulairement, et destinés à recevoir les languettes 15 de l'arrêtoir.The bottom of the case has three notches 16, regularly distributed angularly, and intended to receive the tabs 15 of the retainer.

Les languettes 15 constituent ainsi un moyen de liaison de l'arrêtoir et de l'étui.The tongues 15 thus constitute a connecting means retainer and case.

La mise en place de l'arrêtoir est réalisée de la façon suivante :

  • l'arrêtoir 1 est positionné avec sa face plane 13 contre le fond 11 de l'étui 6, les languettes 15 étant disposées en alternance avec les crans 16 du fond 11,
  • on fait tourner l'arrêtoir par rapport à l'étui d'un angle (ici de l'ordre de 60°) de façon à glisser les languettes 15 derrière les crans 16.
The installation of the retainer is carried out as follows:
  • the retainer 1 is positioned with its flat face 13 against the bottom 11 of the case 6, the tongues 15 being arranged alternately with the notches 16 of the bottom 11,
  • the stopper is rotated with respect to the case by an angle (here of the order of 60 °) so as to slide the tongues 15 behind the notches 16.

Du point de vue fabrication, le fond 11 de l'étui sera réalisé de préférence en un matériau combustible. D'une façon connue, la forme du fond (et notamment les crans) est obtenue par emboutissage d'une feuille de matériau combustible, tel un carton chargé de nitrocellulose.From the manufacturing point of view, the bottom 11 of the case will be preferably made of a combustible material. Of a in known manner, the shape of the bottom (and in particular the notches) is obtained by stamping a sheet of material combustible, such as a cardboard loaded with nitrocellulose.

L'étui de charge propulsive 6 portant l'arrêtoir 1 est introduit dans la chambre 9 de l'arme avec une orientation telle que représentée aux figures 5a et 5b, c'est à dire avec la jupe 3 pénétrant dans la chambre 9 après l'étui 6 lui même.The propellant charge case 6 carrying the retainer 1 is introduced into chamber 9 of the weapon with an orientation as shown in Figures 5a and 5b, i.e. with the skirt 3 entering the chamber 9 after the case 6 himself.

La figure 5b montre l'étui après sa mise en place dans la chambre 9.Figure 5b shows the case after its installation in room 9.

La jupe 3 est définie de telle sorte que son diamètre externe soit supérieur au diamètre de la chambre 9.The skirt 3 is defined so that its diameter external is greater than the diameter of the chamber 9.

Ainsi, l'arrêtoir 1 se déforme à l'intérieur de la chambre et la jupe 3 est en contact avec la surface cylindrique interne 12 de la chambre 9.Thus, the stopper 1 deforms inside the chamber and the skirt 3 is in contact with the surface internal cylindrical 12 of chamber 9.

La déformation radiale élastique de la jupe 3 assure le maintien du contact entre l'arrêtoir et la chambre.The elastic radial deformation of the skirt 3 ensures the maintaining contact between the retainer and the chamber.

Ce contact engendre des efforts de frottement et d'adhérence qui permettent le maintien axial de l'étui dans la chambre de l'arme lorsque cette dernière est fortement inclinée.This contact generates friction forces and of adhesion which allow the axial retention of the case in the weapon chamber when the latter is strongly tilted.

De plus, l'appui de la jupe sur la chambre provoque une déformation élastique de la face plane 13 maintenue par les encoches 16, entraínant un arc-boutement de la jupe qui a pour effet d'augmenter la pression de contact entre la jupe et la chambre, donc la rigidité du maintien axial.In addition, the support of the skirt on the chamber causes a elastic deformation of the flat face 13 maintained by the notches 16, causing a bracing of the skirt which has to increase the contact pressure between the skirt and the chamber, therefore the rigidity of the axial support.

Cette variante de l'invention permet d'assurer un maintien de l'étui pour des étuis dont le diamètre externe est proche de celui de la chambre de l'arme.This variant of the invention ensures a holding the case for cases with an external diameter is close to that of the gun chamber.

On définira la longueur et la conicité de la jupe 3 de façon à assurer une rigidité de maintien suffisante.We will define the length and the taper of the skirt 3 of so as to ensure sufficient holding rigidity.

Pratiquement on donnera à la jupe une pente de l'ordre de 20%, la longueur en contact avec la chambre pouvant être de l'ordre de 0,1 fois le diamètre de la chambre.In practice, we will give the skirt a slope of the order 20%, the length in contact with the chamber can be on the order of 0.1 times the diameter of the chamber.

Là encore, l'arrêtoir peut être fixé de façon permanente sur l'étui, mais il peut également être séparé facilement de celui-ci et peut n'être mis en place qu'au dernier moment en fonction des besoins opérationnels.Again, the retainer can be fixed so permanent on the case, but it can also be separated easily from it and can only be put in place last moment depending on operational needs.

A titre de variante, on pourra réaliser l'arrêtoir en matière plastique fragmentable lors du tir, par exemple en Polyéthylène Haute densité ou en Polyamide. On prévoira le cas échéant des amorces de ruptures sur l'arrêtoir pour faciliter sa destruction lors du tir.Alternatively, the stopper can be made by fragmentable plastic during firing, for example in High density polyethylene or Polyamide. We will provide the if necessary, initiations of ruptures on the retainer for facilitate its destruction during firing.

On pourra également définir un arrêtoir dont la jupe n'est pas continue mais formée de plusieurs secteurs (ou doigts) régulièrement répartis angulairement.We can also define a stopper whose skirt is not continuous but formed of several sectors (or fingers) regularly distributed angularly.

Claims (9)

  1. A retainer (1) for a propellant charge casing, a casing comprising a cylindrical envelope intended to contain a propellant charge and to be introduced into the chamber of a weapon, a retainer characterised in that it comprises a skirt (3), continuous or formed of several segments, a skirt of a diametre which is greater than that of the envelope and the chamber and which is intended to be attached to the casing by joining means, this skirt deforming when the casing is introduced into the weapon chamber so as to ensure that the casing is retained in the chamber.
  2. A retainer according to Claim 1, characterised in that it incorporates a tubular part (2) intended to surround the envelope of the casing, a tubular part which carries joining means (4).
  3. A retainer according to Claim 2, characterised in that the joining means comprise at least a cylindrical rib (4) carried by the tubular part (2) and intended to work in conjunction with a matching rib carried by the casing envelope.
  4. A retainer according to Claim 3, characterised in that the tubular part (2) comprises at least two slits (5) evenly spaced at an angle and enabling the retainer rib (4) to be set into place on the envelope rib.
  5. A retainer according to one of Claims 3 or 4, characterised in that the rib (4) has an outer diametre which is roughly equal to the diametre of the weapon chamber.
  6. A retainer according to Claim 1, characterised in that it incorporates at least a plane face (13) roughly perpendicular to the skirt (3) axis (14), a plane face intended to be applied against the bottom of the casing and carrying the joining means (15).
  7. A retainer according to Claim 6, characterised in that the joining means comprise at least two tabs (15) cut out of the plane face (13) and intended to work in conjunction with notches carried by the casing bottom.
  8. A retainer according to one of Claims 1 to 7, characterised in that it is made of a combustible material.
  9. A casing for a propellant charge, characterised in that it is equipped with a retainer (1) according to one of Claims 1 to 8.
EP96402312A 1995-11-27 1996-10-30 Retainer for the case of an explosive charge Expired - Lifetime EP0775887B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9513977A FR2741709B1 (en) 1995-11-27 1995-11-27 STOP FOR A PROPULSIVE LOAD CASE
FR9513977 1995-11-27

Publications (2)

Publication Number Publication Date
EP0775887A1 EP0775887A1 (en) 1997-05-28
EP0775887B1 true EP0775887B1 (en) 2000-03-08

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ID=9484884

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96402312A Expired - Lifetime EP0775887B1 (en) 1995-11-27 1996-10-30 Retainer for the case of an explosive charge

Country Status (4)

Country Link
EP (1) EP0775887B1 (en)
DE (1) DE69606954T2 (en)
FR (1) FR2741709B1 (en)
ZA (1) ZA969862B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10031588C2 (en) * 2000-06-29 2003-08-07 Rheinmetall W & M Gmbh Multi-part ammunition
DE102005025714A1 (en) 2005-06-04 2007-01-04 Nitrochemie Aschau Gmbh Multi-part ammunition
GB0713369D0 (en) * 2007-07-04 2008-03-12 Bae Systems Plc Charge Mount

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2399398A (en) * 1940-07-05 1946-04-30 Smith William Herbert Ammunition
US2419949A (en) * 1944-02-07 1947-05-06 Edwin J Hottinger Device for securing a propellent charge to an artillery primer

Also Published As

Publication number Publication date
EP0775887A1 (en) 1997-05-28
DE69606954D1 (en) 2000-04-13
ZA969862B (en) 1998-06-08
DE69606954T2 (en) 2000-06-29
FR2741709A1 (en) 1997-05-30
FR2741709B1 (en) 1998-01-30

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