FR2481437A1 - CARTRIDGE FOR METALLIZED RADAR INTERFERENCE FETES - Google Patents

Abstract

A. RADAR JAMMING FETUS CARTRIDGE 30, FOR USE IN A DISPENSER INCLUDING A COMPARTMENT MAGAZINE 21. B. CARTRIDGE CHARACTERIZED BY CONTAINING LONGITUDINAL TUBULAR CELLS 33 OPENING AT ITS ENDS BEFORE 32, 31 AND THESE ENDS. CELLS 33 COINCIDE WITH THE COMPARTMENTS 21 OF THE DISTRIBUTOR, CENTERING AND POLAR ALIGNMENT MEANS 34, 35 BEING FURTHER PROVIDED ON THE CARTRIDGE TO OBTAIN A PERFECT COINCIDENCE ALLOWING THE LOADING OF THE DISPENSER BY THE PACKS OF FETUCHES CONTAINED IN THE CARTRIDGE. C. THE INVENTION IS USED ON AIRPLANES.

Description

The invention relates to a cartridge for fetuses or strands of filaments

  metallized radar jamming, this cartridge being intended to be used in a distributor of

  fetuses to scatter these fetuses of radar jamming.

  The fetus dispenser includes a magazine containing a cer-

  number of compartments in which the fuzzy fetuses

  radar, preferably bundled together, can be

  move towards the ejection end of the magazine.-

  Throughout the following description, the term

  Radar jamming fuzz is meant to refer to all the commonly used means to scramble-radars, such as small strands of fiberglass sheets or filaments

metallized for example.

  Distributors according to the prior art, intended to scatter radar jamming fades are made in many forms for spreading, from airplanes, clouds of jamming fades. These fetal clouds may consist of a multitude of small strands of filaments

  from a pack of de-fetuses and forming electric dipoles

  predetermined lengths. Depending on the length of these

  dipoles, the cloud of fetuses obtained makes it possible to

  frequencies used by reconnaissance gratards,

  homing missiles, or other similar devices.

  The conventional fetus dispensers can be classified, according to their mode of implementation on an aircraft, into three basic types of embodiment. In the first embodiment, the dispenser constitutes a capsule amounting to

  in the form of an external load, on the system structure

weapon of the plane.

  In the second embodiment, the fetus dispenser is attached to the outer shell of the aircraft and is located

  so normally outside the body of the plane.

  In the third type of

  scorer fetus is placed inside the body of the aircraft pro

actually said.

  A common feature of these three embodiments is that the built-in magazine must be filled with radar jamming fetuses prior to use. The radar jamming fade filaments are normally in the form of packets containing a certain amount of filaments

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  interference surrounded by a housing. In a typical form

  embodiment, this housing is constituted by a sheet of aluminum

  minium. At the moment of the ejection of the fetuses, they must be released

  their case and this operation is done by means of a set

  knives arranged at the ejection end of the magazine. The packets of fetus are thus driven successively towards the ejection end and the set of knives cut out the casing in order to release the filament fetuses.

radar jamming.

  An embodiment of a fetus dispenser

  according to the prior art uses a magsin provided with a certain name-

  number of longitudinal compartments. The radar jamming fetus store is loaded by introducing the packets of

  fetus towards the ejection end of the store. Before their charge-

  In this store, packages of fetuses are stored in an outer tubular box having exactly the same dimensions as the corresponding compartment of the store. A number of packages of fetuses are placed one after the other in the outer tubular box which may for example be of cardboard or any other similar material. These cardboard tubes are also enclosed in boxes protected from moisture. At the time of loading, we first remove each cardboard tube from its box, then fit it just in front of a corresponding compartment of the dispenser and hold it in place while pushing the packets of fetus into the compartment by means of a loading rod

  introduced by the other end of the cardboard tube. -

  This loading process is extremely long

  and experience has shown that the loading time of the

  Most of the fetuses were involved in the

preparation time of the aircraft.

  The object of the invention is to overcome the disadvantages

  above of the prior art in solving the problem of

  the use of a type of dispenser allowing more rational handling of the fetus packets at the time of loading, thereby reducing the loading time so that it does not intervene any more.

  significantly in the preparation time of the aircraft.

  The invention also aims to create a much more economical solution to eliminate the use of tubes

  cardboard or the like of the prior art.

  For this purpose, the invention relates to a cartridge

  for radar jamming fetuses for use in a

  fetus to scatter a cloud of fuzzy fetus.

  This fetus dispenser includes a scanner with a number of compartments in which the fetuses or metallized radar scrambling filaments are placed. These fetuses are preferably in the form of packets of fetuses that can move towards an ejection end of the magazine, cartridge characterized in that it is preferably disposable after use and comprises a number of longitudinal tubular cells opening at a front end and at a rear end of the cartridge, the number of these cells

  corresponding to the number of compartments in the store, the dimensions

  and the relative positions of the cells, seen in cross-sections

  respective cross-sections of the cartridge and magazine,

  providing a perfect fit to the magazine compartments, the cartridge being further provided, preferably at its front end, with means for holding the front end of the cartridge centered and in proper polar alignment with the magazine during the loading process; way that each cell comes to be placed in front of its associated compartment to allow loading, in the store, packets of fetus contained in the cells1 this loading being obtained by means of a device with one or two loading rods introducing itself in the cells by the rear end of the cartridge. The cartridge according to the invention can therefore be used both as loading means facilitating and considerably shortening the loading operation of the fetus dispenser, and as packaging allowing rational handling of the fetus packets during transport between the factory of

  manufacture and the site of use.

  During transport, the cartridge may be provided with a lid at each end. The cartridge thus closed by its lids can be protected by a moisture-proof package, constituted for example by a sheet of material

  plastic laid hot. The lids are provided with a

  suitable device for catching them, this device being

  for example constituted by a central hole.

  The invention will be better understood when reading

  the detailed description that follows and that refers to an example

  preferred embodiment shown in the accompanying drawings

wherein.

  - Figure 1 is a schematic side view, partially in section, of a fetal dispenser according to the prior art; FIG. 2 is a sectional view of a magazine used in the fetus dispenser of FIG. 1, illustrating the longitudinal arrangement of the fetal bundle compartments in the magazine; FIG. 3 is a perspective view of a

cartridge according to the invention; and -

  FIG. 4 represents a side view and in view of

  end of the cartridge of Figure 3. -

  The fetus dispenser of FIG. 1 comprises an outer casing of aerodynamic shape 1 whose most

  much of it is occupied by a longitudinal store 2 containing

  a number of longitudinal compartments identi-

  (see Figure 2) in which packets of small bands of radar jamming fetuses can be moved. A motor 3 for rotating the drive screw 4 is placed in the vicinity of the input end of the magazine. Near the ejection end of this magazine is a set of knives 5 including a number of knives for cutting the envelopes of the packets of fetus when these

  pass in front of the set of knives. As the particular shape

  the embodiment of this set of knives is of no importance.

  for the understanding of the invention, this set

  will not be represented and described in detail.

  The knife assembly is supported by a breech piece 6 fixed in the housing 1. The breech 6 carries a shaft 7 protruding rearwardly. This tree is used to support

  the knife assembly 5. On the breech piece 6 is also

  provided a position pin 8 for aligning the

  polar element of the knife assembly 5, the position pin 8

  entering a corresponding hole in the set of necks

  5 at the time of assembly of the latter. The distributor of -

  the fetus further comprises an end piece 9 of aerodynamic shape.

  dynamic to produce air currents intended to properly scatter the fetuses at the time of their ejection

  of the shop. This end piece 9 is carried by the shaft 7.

  The fetal dispenser may also include, in the vicinity of the ejection end, a sleeve movable in the longitudinal direction of the dispenser and having exactly the same external shape as the casing 1. A sleeve of this type makes it possible to fix the spacing between the knife assembly and the end piece 9 when the fetus dispenser

  is not used. This sleeve then helps to give the disc

  fetus tributer a smooth outer shape decreasing the resistance of the air. For clarity, this sleeve has not been shown, and the means to provide on the boot 1 to ensure the fixing of the fetus dispenser on an aircraft.

  Figure 2 shows a section of the magazine 2 following

  I-I of Figure 1. This figure shows that the magazine contains six cylindrical longitudinal compartments 21. In the center of the store there is a free space for

receive the drive screw 4.

  This drive screw is used for the

  pulse of a fetus pack displacement block comprising a central portion 22 provided with six fins 23 arranged to each enter one of the compartments 21 by

  longitudinal slots 24 formed in the partition walls of sepa-

  ration of the compartments. The outer ends of the

  fins 23 have a suitable shape

  drag the packets of fetus. The store also has a

outer shell 20.

  At the moment of ejection of the radar jamming fetuses by the distributor of FIGS. 1 and 2, control signals are emitted by the aircraft towards the engine 3, which then turns the driving screw 4. This screw of FIG. The drive in turn rotates the central portion 22 of the fetus pack movement block, and the fins 23 drive the bundles of fetuses contained in the compartments 21 toward the ejection end of the magazine. At this ejection end, the packets of fetus pass forcibly in front of the set of knives 5 which then cut the envelopes of these packages constituted by

  example by its aluminum sheets. This operation of discovery

  page releases the fetuses from the packets and these fetuses from scrambling

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  radar are then scattered by the air turbulence produced at the ejection end, notably thanks to the

end 9.

  Fig. 3 is a perspective view of an embodiment of cartridge 30 according to the invention. In this embodiment, the cartridge 30 is cylindrical and its transverse dimensions correspond exactly to those of the magazine 20. The cartridge has a front end 31 and a rear end 32. These ends can be closed

  by lids. To facilitate the handling of the car-

  key, the covers are provided with a device for catching them, this device appearing for example under the

shape of a central hole 39.

  The cartridge has six longitudinal cylindrical cells 33. When the covers are removed, these cells 33 open out at both the front and back ends of the cartridge. This cartridge finally has in its center a

  longitudinal cylindrical cavity 34.

  The dimensions of the cavity 34 correspond to

  those of the shaft Tdu fetus distributor of Figure 1.

  The dimensions of the cartridge 30 are chosen so that it can easily be introduced into the dispenser by insertion of the shaft 7 into the cavity 34. The front end of the cartridge 30 also has a positioning cavity. 35 whose size is determined to be able to receive the position pin 8 of the dispenser of FIG. 1, which thus makes it possible to obtain the polar alignment of the cartridge 30 by introducing the position pin 8 into the cavity 35 It will be noted that it is possible to dispense with the position pin 8 and the cavity 35 by giving the shaft 7 and the cavity 34 a shape

  different such as for example a parallelepiped shape.

  The cartridge of FIG. 3 is preferably made of a light plastic material, this cartridge

  for example, can be molded in expanded polystyrene.

  Such a cartridge has the sufficient strength to sup-

  carry the amount of radar jamming fuse packets it contains. However a shop made of polystyrene

  expanded material has low resistance to shocks and

  its localized. This can possibly cause problems due to damage in the vicinity of the mouths of the hole 34.

  and cavity 35 = To avoid these disadvantages, the mouths

  res above can be provided with reinforcing elements formed in Figures 3 and 4 by rings 36 and 37 cooked

  in the plastic material constituting these openings. Years-

  Nos. 36 and 34 may be made of a stronger plastics material or other suitable material. It is also possible, if it is necessary to replace the rings 36 and 37 by a plate covering the entire front end.

  of the cartridge, this plate being then pierced with holes cor-

  corresponding to all openings in the front end of the magazine. During transport and handling, the

  covers described above protect the ends of the car-

  touch against possible damage so that one can, in

  In some cases, reinforcement rings 36 and 37 will be dispensed with.

  FIG. 4 shows a side view and an end view of the front part of the cartridge of FIG. 3, and thus shows the position of the cavity 35 intended to cooperate with the position pin 8 of FIG. 1. L opening of the cavity 35 is surrounded by a reinforcing ring 37 embedded in

  the plastic material of the cartridge. The central hole 34 represents

  As can be seen, the entire length of the cartridge 30 can be seen. However, it should be noted that this hole 34 can also be of different length, the only requirement to be met is to

  have enough space to house the tree 7.

  However, for the sake of simplicity of manufacture,

  cation and saving of material1 it is more interesting to

  provide a hole through the cartridge completely0 The opening

  This hole 34 is surrounded by a reinforcing ring 36. In the bottom of the cartridge 301 a part of the wall thereof has been cut to show a section made through the lowest cell 33e this cell containing

  a number of adjacent fetal packets 40.

  In FIG. 4e, the view of the front end of the cartridge represents the openings of the hole 36, of the cavity, and of the cells 33. The openings of the cells 33 have the

  same dimensions and the same relative positions as

  compartments 21 that the dispenser store section 2 of the

figure 2.

  The length of the cartridge of FIGS. 3 and 4 is chosen according to the number of cells 33, so that this

  cartridge filled with the desired number of fuzzy fuse packets.

  radar, takes a total weight that can be determined at will by charging the fetus dispenser. This may therefore involve the use of one or more cartridges, when charging the dispenser, to completely fill the various

  compartments of it by bundles of fetuses.

  As indicated above, the cartridge according to the

  The invention is also intended to be used as a package during the transport of radar jamming fuse packets between the manufacturing plant and the site of use. The

  purpose of the manufacturer is therefore to fill the cells of the cartridge

  with the desired number of fetal packets. When this operation is carried out, the cartridge is suitably closed by its covers, then by a protective coating against moisture, constituted for example by a sheet of material

plastic stretched hot.

  The user receives the cartridges in this state.

  When it is desired to use them subsequently to load a fetus dispenser, the coating and the covers are removed. At the location

  of use on the aircraft site, the exhibit is removed.

  tremity 9 and the set of knives 5 of the fetus dispenser.

  The cartridge 30 containing the packets of fetus is then mounted on the shaft 7 by its central hole 36 and this cartridge is rotated around the shaft 7 until the position pin 8 comes to lodge in cavity 35. In this position, each

  cell opening comes in front of the opening of the compartment

correspondingly from store 2.

  We then push the packets of fetuses into

  distributor compartments by means of a charging device

  using one or more loading rods is introduced.

  in the cells through the rear end of the cartridge.

  When all the packets of fetus have thus been loaded, the empty cartridge is removed and replaced, if necessary, by a new cartridge of packets of fetus mounted in the same way. This operation is repeated until the dispenser is completely filled with packages of fetuses, and then replaced.

  finally the set of knives 5 and the end piece 9.

  In this first use case, the cartridges 30 were considered "disposable" but

248 1,437

  consider the use of reusable cartridges that can be returned to the manufacturer for refilling of fetus packets, considering that this solution is more

economic and more practical.

  In the exemplary embodiment of the cartridge according to the invention described above, this cartridge has been equipped with

  means for centering and aligning the latter on the distribution

  using the means already provided for this distributor of

  fetus, but it is obvious that we can also equip the

  tributor and the special-resources cartridge adapting to

  various types of use and operation.

Claims (4)

R E V E N D I C A T I 0 N S   1) Cartridge (30) for jamming fuse   used in a fetus dispenser intended to   looting a cloud of radar jamming fetuses, this fetus dispenser comprising a magazine (2) provided with a number of compartments (21) in which the fetuses are placed or   metallized radar scrambling filaments these fetuses present themselves   preferably in the form of packets of fetuses (40)   moving towards an ejection end of the magazine,   key (30) characterized in that it is preferably disposable after use and comprises a number of longitudinal tubular cells (33) opening at a front end (31) and at a rear end (32) of the cartridge, the number of these cells corresponding to the number of compartments (21) of the magazine, the dimensions and the relative positions of the cells, seen in respective cross sections of the cartridge and the magazine, allowing a perfect adaptation to the compartments of the magazine, the cartridge being further provided , preferably at its front end, means (34, 35) for maintaining   this front end (31) of the cartridge centered and in alignment with   polar pattern with the magazine during the loading process, so that each cell (33)   face of its associated compartment (21) to allow charging   In the store, packages of fetuses contained in   cells (33), this loading being obtained by means of a   with one or two loading rods entering the   cells through the rear end (32) of the cartridge.   Cartridge according to claim 1, characterized in that the centering means comprise a position guide placed on the cartridge and in the form of a hole.   (34) opening at the front end of the cartridge, the dimensions   this hole corresponding to a shaft (7) placed in the vicinity of the ejection end of the fetus dispenser, thereby temporarily mounting the cartridge on the shaft   (7) during the loading process.   Cartridge according to any of the claims   1 and 2, characterized in that the hole of the cartridge and the shaft (7) of the dispenser are of cylindrical shape and are located in the center of the two elements, and in that the polar alignment means of the cartridge are constituted by a locating pin (8) protruding from the end of the distributor and intended to be housed in a corresponding cavity (35)   from the front end of the cartridge or vice versa.   4o) Cartridge according to any one of the   cations 1 to 30 carac-cterisee in that it is made of a plastic material low densityo) cartridge according to any one of claims   cations 1 to 4A characterized in that it is made of poly-   styrene enpanse by simple molding or under pressure   60) Cartridge according to any of the claims   cations 1 to 50, characterized in that it comprises at its end   mity (31) one or more reinforcing elements (36, 37) located in the vicinity of the openings (33, 34, 35) opening at this end before the cartridgeo   7) Cartridge according to any of the claims   cations 1 to 6, characterized in that it is provided with   key (38) at its forward end and at its rear end, and in that these lids are preferably provided with devices (39) for catching them to handle more easily the cartridge.   8) Cartridge according to any of the claims   cations 1 to 7, characterized in that it is provided with a packaging   the outer layer of protection against moisture 0 this coating being constituted by a plastic material placed on hot or other.