EP0775887A1 - 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
EP0775887A1
EP0775887A1 EP96402312A EP96402312A EP0775887A1 EP 0775887 A1 EP0775887 A1 EP 0775887A1 EP 96402312 A EP96402312 A EP 96402312A EP 96402312 A EP96402312 A EP 96402312A EP 0775887 A1 EP0775887 A1 EP 0775887A1
Authority
EP
European Patent Office
Prior art keywords
case
chamber
skirt
stopper
retainer
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
EP96402312A
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German (de)
French (fr)
Other versions
EP0775887B1 (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
Original Assignee
Giat Industries SA
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Filing date
Publication date
Application filed by Giat Industries SA filed Critical Giat Industries SA
Publication of EP0775887A1 publication Critical patent/EP0775887A1/en
Application granted granted Critical
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 an artillery propellant charge case.
  • the artillery propellant charges today consist of a case, made of combustible material, and inside which is placed a propellant powder in bulk or in bundles.
  • the propellant case may slide at least partially out of the chamber before it is closed by the shooting plate, thus disrupting the closing and possibly causing shooting incidents.
  • This hollow or this cylindrical surface is delimited on the side of the firing plate by a bearing surface which retains the propellant charge inside the chamber.
  • the stopper according to the invention is carried by the case itself and it makes it possible to ensure the axial maintenance of the case in the chamber of the weapon even when the case is coaxial with the chamber.
  • the retainer according to the invention ensures such maintenance whatever the geometry of the chamber, in particular even if the chamber of the weapon is devoid of holding means.
  • the subject of the invention is a stopper for a propellant charge case, case comprising a cylindrical envelope intended to contain a propellant charge and to be introduced into the chamber of a weapon, stopper 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 chamber and intended to be fixed to the case by connecting means, this skirt deforming during the introduction of the holster in the chamber of the weapon so as to maintain the holster in the chamber.
  • the retainer comprises a tubular portion intended to surround the envelope of the case, tubular portion which carries the connecting means.
  • the connecting means may include at least one cylindrical bead carried by the tubular portion and intended to cooperate with a complementary bead carried 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 of the chamber of the weapon.
  • the retainer comprises at least one flat face substantially normal to the axis of the skirt, square face intended to be applied against a bottom of the case and carrying the means of liaison.
  • the connecting means may include at least two tabs cut on the flat face and intended to cooperate with notches carried by the bottom of the case.
  • the stopper according to the invention will be made of a combustible material.
  • the invention also relates to a case for propellant charge provided with such a retainer whether it is removable or not.
  • a retainer 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 envelope of a propellant charge case (not shown) and its internal diameter is therefore substantially equal to the external diameter of the case.
  • the skirt 3 has an external 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 longitudinal slots 5, regularly distributed angularly, and arranged so as to give a certain radial elasticity to the tubular portion 2, at the level of the bead 4.
  • This stopper is made of a combustible material, such as a cardboard loaded or not with nitrocellulose, and it is intended to be fixed to a case 6 of propellant charge as shown in Figures 2a and 2b.
  • the case 6 comprises a cylindrical envelope 7 closed 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 details).
  • Casing and bottom are made of combustible material.
  • the cylindrical envelope 7 also carries a bead 10, which may be continuous over the entire circumference of the envelope or else discontinuous.
  • the bead 4 of the retainer constitutes a means of connection between the retainer and the case 6.
  • the stopper is fixed to the case by sliding it on the casing 7 of the latter.
  • 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 is housed 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 the chamber 9 of the weapon with preferably an orientation such that the bead 4 enters the chamber before the skirt 3, this in order to facilitate the introduction of the stop in the room.
  • FIG. 2b shows the case after it has been placed in the chamber 9.
  • the skirt 3 is defined so that its external diameter is greater than the diameter of the chamber 9.
  • the retainer 1 deforms inside the chamber and the skirt 3 is in contact with the internal cylindrical surface 12 of the chamber 9.
  • the elastic radial deformation of the skirt ensures the maintenance of the contact between the retainer and the chamber.
  • This contact generates friction and grip forces which allow the axial retention of the holster in the chamber of the weapon when the latter is strongly inclined.
  • the length of the skirt 3 so as to ensure sufficient friction.
  • the skirt will be given a length in contact with the chamber of the order of 0.1 times the diameter of the chamber.
  • the bead 4 will be given an external diameter substantially equal to the diameter of the chamber 9 of the weapon.
  • Such a retainer can be permanently fixed to the case.
  • Figures 3a and 3b show a stopper 1 according to a second embodiment of the invention.
  • this retainer comprises a skirt 3 having a slightly conical shape flared towards a rear part AR of the retainer.
  • the skirt is connected to a face 13 substantially flat and normal to the axis 14 of the skirt.
  • the flat face 13 is cut and carries three tabs 15 regularly distributed angularly
  • This stopper is made of a combustible material, such as a cardboard loaded or not with nitrocellulose, and it is intended to be fixed to a case 6 of propellant charge as shown in FIG. 4.
  • the flat face 13 of the support 1 is applied against a bottom 11 of the case 6.
  • the diameter of the skirt 3 is greater than that of the envelope of the case 6 and it is also chosen to be greater than the diameter of the chamber of the weapon.
  • the bottom of the case carries three notches 16, regularly angularly distributed, and intended to receive the tongues 15 of the retainer.
  • the tongues 15 thus constitute a means of connecting the retainer and the case.
  • the bottom 11 of the case will preferably be made of a combustible material.
  • the shape of the bottom is obtained by stamping a sheet of combustible material, such as a cardboard loaded with nitrocellulose.
  • the propellant charge case 6 carrying the retainer 1 is introduced into the chamber 9 of the weapon with an orientation as shown in FIGS. 5a and 5b, that is to say with the skirt 3 penetrating into the chamber 9 after the case 6 itself.
  • FIG. 5b shows the case after it has been placed in the chamber 9.
  • the skirt 3 is defined so that its external diameter is greater than the diameter of the chamber 9.
  • the retainer 1 deforms inside the chamber and the skirt 3 is in contact with the internal cylindrical surface 12 of the chamber 9.
  • This contact generates friction and grip forces which allow the axial retention of the holster in the chamber of the weapon when the latter is strongly inclined.
  • the support of the skirt on the chamber causes an elastic deformation of the flat face 13 held by the notches 16, causing an arching of the skirt which has the effect of increasing the contact pressure between the skirt and the chamber, therefore the rigidity of the axial support.
  • This variant of the invention makes it possible to maintain the holster for holsters whose external diameter is close to that of the chamber of the weapon.
  • the length and the taper of the skirt 3 will be defined so as to ensure sufficient holding rigidity.
  • the skirt will be given a slope of the order of 20%, the length in contact with the chamber possibly being of 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 easily separated from it and can only be put in place at the last moment according to operational needs.
  • the stopper made of fragmentable plastic during firing for example in high density polyethylene or in polyamide. Provision will be made, if necessary, for ruptures on the retainer to 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)

Abstract

The arrester is used on a cylindrical cartridge containing a propellant charge (8) designed to fire an artillery projectile. The arrester has a skirt (3) which is made in one piece or several sections. The skirt has a diameter greater than that of the cartridge (6) or the chamber (9) of the artillery piece. The skirt flexes as the cartridge is inserted into the chamber, holding the cartridge in place. The skirt has a tubular section (2) which fits against the outer wall of the cartridge with a projecting ring (4) to engage with a similar ring on the cartridge wall, and a flared end of greater diameter. It can be made from a combustible material or one which fragments on firing, e.g. high density polyethylene or polyamide.

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 an 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.The artillery propellant charges today consist of a case, made of combustible material, and inside which is placed a propellant powder in bulk 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 introduced inside 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 so as to fire with a large angle of elevation (of the order of 45 °), the propellant case may slide at least partially out of the chamber before it is closed by the shooting plate, thus disrupting the closing and possibly causing 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 making it possible to prevent the propellant charge from leaving the chamber generally provide for specific machining of the chamber.

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 achieved a hollow (called a spoon) or a cylindrical machining slightly offset from the chamber. This hollow or this cylindrical surface is delimited on the side of the firing plate by a bearing surface which retains the propellant charge inside the chamber.

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. On the other hand, they are ineffective in maintaining current cylindrical cases, the rigidity of which is such that they ensure their positioning in a manner substantially coaxial with the chamber, thus preventing them from being pressed into 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 stopper for a propellant charge case which does not have such drawbacks.

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 stopper according to the invention is carried by the case itself and it makes it possible to ensure the axial maintenance of the case in the chamber of the weapon even when the case is coaxial with the chamber.

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 connection with the case, the retainer according to the invention ensures such maintenance whatever the geometry of the chamber, in particular even if the chamber of the weapon is devoid of holding means.

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 may or may not be attached to the case as required.

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 propellant charge case, case comprising a cylindrical envelope intended to contain a propellant charge and to be introduced into the chamber of a weapon, stopper 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 chamber and intended to be fixed to the case by connecting means, this skirt deforming during the introduction of the holster in the chamber of the weapon so as to maintain the holster in the chamber.

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 comprises a tubular portion intended to surround the envelope of the case, tubular portion which carries the connecting means.

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 connecting means may include at least one cylindrical bead carried by the tubular portion and intended to cooperate with a complementary bead carried 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 of the chamber of the weapon.

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 comprises at least one flat face substantially normal to the axis of the skirt, square face 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 connecting means may include at least two tabs cut on the flat face and intended to 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 stopper 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 propellant charge provided with such a retainer whether it is removable or not.

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 put in place 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 reference is made to FIG. 1, a retainer 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 envelope of a propellant charge case (not shown) and its internal diameter is therefore substantially equal to the external 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 external 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 longitudinal slots 5, regularly distributed angularly, and arranged so as to give a certain radial elasticity to the tubular portion 2, at the level of the bead 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 a cardboard loaded or not with nitrocellulose, and it is intended to be fixed to a case 6 of propellant charge 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 cylindrical envelope 7 closed 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 details).

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

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 else 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.The stopper is fixed to the case by sliding it on the casing 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 is housed 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 the chamber 9 of the weapon with preferably an orientation such that the bead 4 enters the chamber before the skirt 3, this in order to facilitate the introduction of the stop in the room.

La figure 2b montre l'étui après sa mise en place dans la chambre 9.FIG. 2b shows the case after it has been placed in the chamber 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 external diameter 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 retainer 1 deforms inside the chamber and the skirt 3 is in contact with the internal cylindrical surface 12 of the 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 maintenance of the 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 and grip forces which allow the axial retention of the holster in the chamber of the weapon when the latter is strongly inclined.

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, the skirt will be given a length in contact with the chamber of 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 an external diameter substantially equal to the diameter of the chamber 9 of the weapon.

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 relative to the chamber. This ensures coaxiality of the case 6 and the chamber at the level of the retainer 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 also makes it possible to lock the retainer on the case. There is then no risk of seeing the stopper separating from the case at the time of introduction into the room or of seeing it detach 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 put in place at the last moment according to operational needs.

Diverses variantes de ce mode de réalisation sont possibles.Various variants 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.Thus, it is possible to provide a stopper made of fragmentable plastic material during firing, for example in High density polyethylene or Polyamide. Provision will be made, if necessary, for ruptures on the retainer to 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.One 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 according to 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 comprises a skirt 3 having a slightly conical shape flared towards a rear part 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 face 13 substantially flat 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 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 a cardboard loaded or not with nitrocellulose, and it is intended to be fixed to a case 6 of propellant charge as shown in FIG. 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 the 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 to be 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 carries three notches 16, regularly angularly distributed, and intended to receive the tongues 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 means of connecting the retainer and the 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 stopper 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 preferably be made of a combustible material. In a known manner, the shape of the bottom (and in particular the notches) is obtained by stamping a sheet of combustible material, 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 the chamber 9 of the weapon with an orientation as shown in FIGS. 5a and 5b, that is to say with the skirt 3 penetrating into the chamber 9 after the case 6 itself.

La figure 5b montre l'étui après sa mise en place dans la chambre 9.FIG. 5b shows the case after it has been placed in the chamber 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 external diameter 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 retainer 1 deforms inside the chamber and the skirt 3 is in contact with the internal cylindrical surface 12 of the 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 maintains 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 and grip forces which allow the axial retention of the holster in the chamber of the weapon when the latter is strongly inclined.

De plus, l'appui de la jupe sur la chambre provoque une déformation élastique de la face plane 13 maintenue par les encoches 16, entraînant 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 an elastic deformation of the flat face 13 held by the notches 16, causing an arching of the skirt which has the effect of increasing 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 makes it possible to maintain the holster for holsters whose external diameter is close to that of the chamber of the weapon.

On définira la longueur et la conicité de la jupe 3 de façon à assurer une rigidité de maintien suffisante.The length and the taper of the skirt 3 will be defined 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, the skirt will be given a slope of the order of 20%, the length in contact with the chamber possibly being of 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 easily separated from it and can only be put in place at the last moment according to 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.As a variant, it will be possible to make the stopper made of fragmentable plastic during firing, for example in high density polyethylene or in polyamide. Provision will be made, if necessary, for ruptures on the retainer to 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)

Arrêtoir (1) 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 (3), 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.Stopper (1) for a propellant charge case, case comprising a cylindrical casing intended to contain a propellant charge and to be introduced into the chamber of a weapon, stopper characterized in that it comprises a skirt (3), continuous or formed of several sectors, skirt of diameter greater than that of the envelope and that of the chamber and intended to be fixed to the case by connecting means, this skirt deforming during the introduction of the case into the weapon chamber so as to maintain the holster in the chamber. Arrêtoir selon la revendication 1, caractérisé en ce qu'il comporte une portion tubulaire (2) destinée à entourer l'enveloppe de l'étui, portion tubulaire qui porte les moyens de liaison (4).Stopper according to claim 1, characterized in that it comprises a tubular portion (2) intended to surround the envelope of the case, tubular portion which carries the connecting means (4). Arrêtoir selon la revendication 2, caractérisé en ce que les moyens de liaison comprennent au moins un bourrelet cylindrique (4) porté par la portion tubulaire (2) et destiné à coopérer avec un bourrelet complémentaire porté par l'enveloppe de l'étui.Stop according to claim 2, characterized in that the connecting means comprise at least one cylindrical bead (4) carried by the tubular portion (2) and intended to cooperate with a complementary bead carried by the envelope of the case. Arrêtoir selon la revendication 3, caractérisé en ce que la portion tubulaire (2) comporte au moins deux fentes (5) régulièrement réparties angulairement et permettant la mise en place par déformation élastique du bourrelet (4) de l'arrêtoir sur le bourrelet de l'enveloppe.Stopper according to claim 3, characterized in that the tubular portion (2) comprises at least two slots (5) regularly distributed angularly and allowing the positioning by elastic deformation of the bead (4) of the stopper on the bead of the 'envelope. Arrêtoir selon une des revendications 3 ou 4, caractérisé en ce que le bourrelet (4) de l'arrêtoir présente un diamètre externe sensiblement égal au diamètre de la chambre de l'arme.Stopper according to one of claims 3 or 4, characterized in that the bead (4) of the stopper has an external diameter substantially equal to the diameter of the chamber of the weapon. Arrêtoir selon la revendication 1, caractérisé en ce qu'il comporte au moins une face plane (13) sensiblement normale à l'axe (14) de la jupe (3), face place destinée à être appliquée contre un fond de l'étui et portant les moyens de liaison (15).Stopper according to claim 1, characterized in that it comprises at least one flat face (13) substantially normal to the axis (14) of the skirt (3), place face intended to be applied against a bottom of the case and carrying the connecting means (15). Arrêtoir selon la revendication 6, caractérisé en ce que les moyens de liaison comprennent au moins deux languettes (15) découpées sur la face plane (13) et destinées à coopérer avec des crans portés par le fond de l'étui.Stopper according to claim 6, characterized in that the connecting means comprise at least two tabs (15) cut out on the flat face (13) and intended to cooperate with notches carried by the bottom of the case. Arrêtoir selon une des revendications 1 à 7, caractérisé en ce qu'il est réalisé en un matériau combustible.Stopper according to one of claims 1 to 7, characterized in that it is made of a combustible material. Etui pour charge propulsive caractérisé en ce qu'il est muni d'un arrêtoir (1) selon une des revendications 1 à 8.Case for propellant charge characterized in that it is provided 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 true EP0775887A1 (en) 1997-05-28
EP0775887B1 EP0775887B1 (en) 2000-03-08

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ID=9484884

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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)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2811073A1 (en) * 2000-06-29 2002-01-04 Rheinmetall W & M Gmbh MULTIPLE AMMUNITION
WO2009004384A1 (en) * 2007-07-04 2009-01-08 Bae Systems Plc Charge mount
US7707940B2 (en) 2005-06-04 2010-05-04 Nitrochemie Aschau Gmbh Multiple part munition

Citations (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

Patent Citations (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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2811073A1 (en) * 2000-06-29 2002-01-04 Rheinmetall W & M Gmbh MULTIPLE AMMUNITION
ES2195725A1 (en) * 2000-06-29 2003-12-01 Nitrochemie Gmbh Multi-section munition has sections joined together by bayonet couplings
US7707940B2 (en) 2005-06-04 2010-05-04 Nitrochemie Aschau Gmbh Multiple part munition
WO2009004384A1 (en) * 2007-07-04 2009-01-08 Bae Systems Plc Charge mount
US8127684B2 (en) 2007-07-04 2012-03-06 Bae Systems Plc Charge mount

Also Published As

Publication number Publication date
EP0775887B1 (en) 2000-03-08
FR2741709B1 (en) 1998-01-30
FR2741709A1 (en) 1997-05-30
DE69606954D1 (en) 2000-04-13
DE69606954T2 (en) 2000-06-29
ZA969862B (en) 1998-06-08

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