FR2529662A1 - CARTRIDGE SOCKET FOR SHOOTING SIGNAL AMMUNITION - Google Patents

Abstract

FOR THE CARTRIDGE SLEEVES, WHICH ARE USED FOR THE STORAGE AND SHOOTING OF A SIGNALING AMMUNITION, PROTECTION AGAINST AGGRESSIONS OF MOISTURE IS PROVIDED WITH A SHEET OF METAL SHEET 6, WHICH IS WELDED ON THE SOCKET IN SYNTHETIC MATERIAL. WITH THE BLOCKING SHEET 6 AND A CARDBOARD DISC 7, A REGULARITY OF THE NECESSARY PUNCHING FORCE OF THE AMMUNITION IS OBTAINED, WHICH EXTENDS AN INFLUENCE ON THE FORCE OF THE RECOIL AND ON THE INITIAL SPEED OF THE AMMUNITION AT THE START AND, THEREFORE, ON THE REGULARITY OF THE HEIGHT OF ASCENSION OF THE AMMUNITION. THE REQUIRED PUNCHING FORCE CAN BE ADJUSTED BY ADJUSTING THE THICKNESS 12 OF THE METAL SHEET AS WELL AS THE DIMENSIONS OF THE CLOSED SURFACE 8, 10.

Description

l

  Cartridge cartridge case for firing signal ammunition

  station. The present invention relates to a cartridge case for firing signaling ammunition with,

  on the mouth, a sealing impermeable to humidity.

  Signaling ammunition intended for use

  tion on land or at sea, are housed for storage in suitable sockets, insensitive to

  humidity, these sockets being used to draw the

  say ammunition directly from the hand Usually, the orifice of the socket, on the side of the mouth, is closed by a cardboard or plastic disc, and additional sealing means such as varnish, silicone, rubber, glue or sealing rings. The object of the present invention is to provide a simple and economical closure for the orifice on the mouth side of a cartridge case. According to the present invention, this result is obtained by using, to close said orifice, an aluminum obturation sheet. commercial, provided with an adhesive layer and joined to the

  cartridge case made of a thermoplastic material

  tick by the combined action of pressure, temperature

erasure and time.

  According to an exemplary embodiment of the invention, a disk made of relatively rigid material, such as cardboard or aluminum, is disposed on a shoulder

  from the socket and held in place by the sealing sheet

  The shutter sheet is folded around the hole.

  fice from the mouth of the socket and the rush surfaces

  tion by welding extend as well on the front part, around the orifice, as on the periphery of the socket The socket can be made of polystyrene The sealing sheet preferably has a thickness of about 0.1 to 0, 2 mm, and the junction surface, around the periphery of the socket, a width approximately equal to twenty

  times the thickness of the shutter metal sheet.

  According to the present invention, the closure properly

  said consists of the aluminum shutter sheet

  nium The adhesive layer deposited on the aluminum foil

  nium and which combines with the socket made of a thermoplastic material under the effect of temperature and pressure, ensures that it is very thin and above all very regular, that no moisture can penetrate from the outside to the inside of the socket What is particularly important is that thanks to the extraordinary reproducibility of the bonding junction,

  the force of per-

  borehole to be developed by ammunition Strength

  perforation, which among other things has a definite influence

  nante on the force of the recoil in the case where the ammunition is pulled by hand, can be determined or adjusted by acting on the dimensioning of the thickness of the sheet

  shutter and / or on the size or diameter of the sur-

  face thus closed Thanks to the reproducibility of the retaining effect, a clear reduction in the variation in height is obtained, compared with already known systems

  of the signaling ammunition.

  With the presence of the disc of rigid material, mentioned above, it is ensured that the pressure exerted by the ammunition at the time of firing of the propellant charge is uniformly distributed over the sheet

  shutter This avoids any deviation in a safe way

  initial tion of the trajectory of the ammunition, at the exit of the casing, which could occur in the event that the tearing of the obturation did not occur

  only on one side only of the mouth opening.

  Thanks to the folding of the obturator sheet on the outer rim of the cartridge case, a junction is obtained between the obturator sheet and the case which is insensitive to deterioration which may occur during the storage of the cartridges Shocks acting on the peripheral junction surface have no influence on the front junction surface With only a front junction surface, there is a risk of the metal foil peeling off the

  front junction face under the effect of a stress

  tion acting on a part of the periphery Such stresses are absorbed by the part of the sealing sheet which is folded over the edge of the sleeve. In the drawing, an example of

realization of the invention.

  We see, in the single figure of the drawing, the starting orifice 1 or "mouth" of a cartridge case 2 for -10 housing and firing a signaling ammunition which

  not shown In mouth 3, the cartridge case

  key 2 has a shoulder 4 on which rests a cardboard disk S closing said mouth 3 On the side of the mouth, the sleeve 2 is closed by means of a sheet

  shutter 6 which simultaneously fixes the disc 5 on the

payment 4.

  The obturation sheet 6, which is commercially available, consists of a 0.1 mm thick aluminum sheet, which is coated with an adhesive layer.

  obturation sheet covers the entire front side

  tale 7 of the disc 5 as well as the front end of the sleeve 2 The sealing sheet 6 is folded down further on the periphery of the sleeve The width 9 of the peripheral band 10 thus folded down is approximately equal

  at twenty times the thickness of the sealing sheet 6.

  The sealing sheet 6 is welded to the socket,

  which is made of polystyrene, by bringing it to a

  temperature of approximately 473 O K at a pressure of approximately 1.50 M Pa with an application time of approximately 5 s Du

  side of the socket, the welding surfaces are thus

  formed by the front face 8 and the peripheral surface which is covered by the folded edge 10 of the sheet

shutter 6.

  When the signaling ammunition, not 3 S shown, is pulled through the disc Seals

  exerts pressure on the bonding surfaces 8, 10.

  The obturator sheet 6 elongates to begin with and then tears along a circumference, in the region of the

edge 11 of socket 2.

  For disc 5, made of cardboard, aluminum could also be used.

Claims (6)

  1 cartridge case for firing a muni-   signaling with, on the mouth, a sealing device impermeable to humidity, characterized in that to make said device, there is provided a sealing sheet (6) commercially available,   made of aluminum, coated with an adhesive layer, which   bine to the polystyrene cartridge socket (2) under the combined action of pressure, temperature and of an application time.   2 cartridge case according to claim 1,   characterized by the fact that a disc (5) made of relative material   rigidly such that cardboard or aluminum is placed on a shoulder (4) provided inside the sleeve (2), and that this disc is held by the sheet shutter (6).   3 cartridge case -as claimed in claim 1, characterized in that the closure sheet (6) is folded out around the mouth (3) of the socket (2) and that the junction surfaces by welding are provided both frontally (8) and at the periphery (10).   4 cartridge case according to claim 1,   characterized by the fact that said socket is made of polys-   tyrene. 5 cartridge case according to claim 1, characterized in that the closure sheet (6)   has a thickness of about 0.1 to 0.2 mm.   6 cartridge case according to claim 3,   characterized by the fact that the junction surface peri-   spherical (10), on the sleeve (2) has a width (9) approximately equal to twenty times the thickness (12) of the shutter sheet.