EP1370825A1

EP1370825A1 - Igniter with a safety device for a projectile which is shot from a pipe with angular momentum

Info

Publication number: EP1370825A1
Application number: EP02727213A
Authority: EP
Inventors: Detlef Haeselich
Original assignee: Nico-Pyrotechnikhanns-Juergen Diederichs & Co KG GmbH; NICO PYROTECHNIKHANNS JUERGEN; Nico Pyrotechnik Hanns Juergen Diederichs GmbH and Co KG
Current assignee: Rheinmetall Waffe Munition GmbH
Priority date: 2001-03-12
Filing date: 2002-03-12
Publication date: 2003-12-17
Anticipated expiration: 2022-03-12
Also published as: NO20033952D0; CA2440731C; JP4053428B2; KR20030090667A; WO2002073119A1; US6880464B2; ATE422657T1; NO20033952L; JP2004521309A; ES2324096T3; AU2002257524B2; EP1370825B1; US20040074411A1; DE50213267D1; DE10111714C1; NO327470B1; CA2440731A1

Abstract

The igniter comprises a disk-shaped element ( 15 ) with a central portion ( 16 ) and a boundary portion ( 17 ) surrounding it for interrupting and/or releasing an ignition chain ( 13 a , 13 b) of the igniter. Only the central portion interrupts the chain of ignition and is supported by a holding device ( 19 ). A collecting space is provided around the holding device which, seen in the direction of flight of the projectile, is located below the boundary portion ( 17 ). The central portion ( 16 ) and the boundary portion ( 17 ) are connected with each other by means of a rated breaking point ( 18 ). Upon the initial acceleration of the projectile the boundary portion ( 17 ) is sheared off from the central portion ( 16 ) and received in the collecting space ( 21 ), whereupon the central portion ( 16 ) is also subsequently removed from the ignition chain ( 13 a , 13 b) by the twist of the projectile.

Description

Detonator with safety device for a projectile to be fired from a tube with swirl

The invention relates to an igniter for a projectile to be fired from a tube with a swirl according to the preamble of patent claim 1.

Such projectiles, the z. B. from several pyrotechnic charges for triggering an irkeffekt should be equipped with a safety device that interrupts the ignition chain in a first position and when the projectile is shot through its initial acceleration and its swirl passes from this first position into a second position releasing the ignition chain , This prevents the ignition chain from igniting even though the projectile is at rest, e.g. B. is still in the barrel.

From DE-A12037182 a detonator for projectiles is known, which has a safety device with disc-shaped elements, for. B. has a plastically deformable plate. This plate is arranged between a body containing the primer and the part of the projectile containing an opening leading to the charge to be ignited. This arrangement is intended to prevent the explosive charge of the projectile from being detonated in the secure position of the body receiving it in the event of an unwanted ignition of the squib. In the event of an unwanted ignition of the squib, the hot explosion gases then come under high pressure onto the plastically deformable plate, as a result of which the latter is deformed and pressed firmly into the joints between the squib support and the receiving parts, so that the hot explosion gases are released of the explosive charge leading opening. Such projectiles are also called so-called

Effect ammunition used, e.g. B. in the surprise of

Criminals or in the fight against violent

Demonstrators. This effect ammunition is from the sharp

Ammunition derived, for. B. a cartridge ammunition with a caliber of 40 mm. As effects are z. B. CS,

Tear gas, fog, star-generating charges, lightning charges, etc. applied. This effect ammunition has one

Impact igniter, which ignites the effect of the impact. If this detonator does not work, it must be ensured that the effect is triggered at least after a certain time or self-dismantled in order to safely clear the

To enable effect ammunition. Here is an additional one

Safety detonator provided with an ignition chain, which consists of at least one igniter ignited when the effect bullet was fired and at least one further charge, in particular a delay charge, via which, after its combustion, the actual active charge z. B. about

Detonating cords or booster charges are fired about four seconds after the launch.

Such ammunition is usually fired from short-barreled weapons or from short drum magazines. In magazine weapons, the magazine is usually covered by a disk that only releases the cartridge that is actually to be fired, whereas all other magazine barrels are covered by the disk.

If the propellant charge is not fired when attempting to fire the effect ammunition, it may happen that the delay charge for the safety fuse is still ignited, for example by a too weak propellant charge or solely by the primer. Since the ammunition now does not leave the barrel of the firearm, be it a normal barrel weapon or a magazine weapon, the effect is triggered after the specified delay time of about 4 seconds. This can be used for bystanders and the shooter himself a high risk of injury, especially if a magazine weapon is used. As soon as the launch is triggered there, the

Magazine drum, although the projectile does not leave the magazine, turned one place, so that now the

Magazine barrel in which cartridge ammunition with burning

Delay ignition chain is located, is closed at the front.

Is then after the predetermined delay time

Effect triggered, such. B. released a tear gas, it can practically only escape towards the back of the shooter, so that a high one

There is a risk of injury.

It would therefore be desirable to insert, in a manner known per se, a safety device into the ignition chain to trigger the active effect, which interrupts the ignition chain in a first position and, when the projectile is shot down, by its initial acceleration and its swirl from this first position into a second releasing the ignition chain Position passes. Such safety devices are known for projectile detonators in a large number of variants.

The invention has for its object to provide such a safety device for a projectile of the type in question, which is simple in construction, inexpensive to manufacture and reliably ensures that the effective effect is actually only ignited when the projectile has the initial acceleration associated with a launch and experienced the twist.

This object is achieved according to the invention by the characterizing features of patent claim 1.

Accordingly, the securing device has a disk-shaped element with a central area and an edge area surrounding it. Only the central area interrupts the ignition chain and is mechanically supported by a holding device and on Held place. The central area and the peripheral area are connected to one another via a predetermined breaking point that tears open during the initial acceleration of the projectile. In addition, a collecting space is provided around the holding device, which the at the initial acceleration of the

Bullet separated from the central area at the predetermined breaking point and then by the

Swirl of the projectile removed from the central chain

Area.

Such a safety device for an igniter is very simple and inexpensive to manufacture, since the safety device z. B. is a correspondingly prepared simple plastic disc.

When the projectile is fired, the initial acceleration affects both the central area and the peripheral area. However, since only the central area is supported, this initial acceleration shears off the edge area at the predetermined breaking point from the central area and falls into the catchment area located behind the edge area in the direction of flight of the projectile. This has a thickness which corresponds to at least twice the thickness of the edge area, so that when the edge area lies in the receiving space, it is removed from the plane of the central area. The swirl now acts on this central area, so that this central area is more or less removed from the ignition chain and this is released thereby.

The swirl and the swirl acceleration are usually so large that the center area lies eccentrically to the swirl axis of the projectile due to the remnants of the predetermined breaking point alone, so that the centrifugal forces remove the central area from the ignition chain. It is of course possible to deliberately set the center of mass of the central area eccentrically to the swirl axis of the projectile. The predetermined breaking point can, for. B. by reducing the thickness of the material of the disc-shaped element in the boundary region between the central region and the edge region. Furthermore, the central area and the edge area can be connected to one another via webs. Another possibility is to design the central area and the edge area as individual parts and to connect these with a connecting element, e.g. B. to connect a self-adhesive film that forms the predetermined breaking point.

Further embodiments of the invention emerge from the subclaims.

The invention is explained in more detail in exemplary embodiments with reference to the drawing. In this represent:

1 shows a partially cut effect ammunition from the cartridge case and the projectile with a disk-shaped securing device for interrupting the ignition chain for an effective effect;

FIG. 2 shows a cross section through the rear area of a projectile with a disk-shaped securing device that is slightly modified compared to FIG. 1;

FIG. 3 shows a bottom view of the disk-shaped securing device according to FIG. 2;

Figure 4 shows another embodiment of a disk-shaped securing device according to the invention; and

Figure 5 shows another embodiment of a disk-shaped safety device according to the invention.

In Figure 1, an effect ammunition with a cartridge case 2 and a projectile 3 inserted therein is shown partially in section. At the bottom of the cartridge case 2, a primer 4 is arranged, with which one in one Cartridge 5 located propellant charge 6 is ignited. The

Cartridge 5 has overflow openings which open into a pressure chamber 8 between cartridge case 2 and floor 3.

The floor 3 has in its bow a cargo space 10 in which an effect charge, for. B. CS tear gas or the like is located, which can be triggered pyrotechnically. This is usually done by an impact detonator 11, which is only indicated here as a switch, and which ignites a pyrotechnic ignition charge 12 when the projectile hits, which in turn triggers the active charge present in the cargo space 10.

When the propellant charge 6 is ignited, a delay charge 13 is also ignited by its propellant gases, which, however, is divided into two parts 13a and 13b. The partial charges 13a and 13b are separated from one another by an ignition gap 14.

In this overfire gap 14, a disk 15 is inserted as a safety device for interrupting or releasing the ignition chain between the two delay charges 13a and 13b, which disk consists of a central area 16 and an edge area 17 surrounding it, which are separated from one another by a predetermined breaking point 18.

The central area 16 is one of the

Retention charge charge 13a surrounding holding device, for. B. a base 19 supported. The edge region 17 has a greater thickness than the central region 16, the step between the central region 16 and the edge region 17 being essentially given by the predetermined breaking point 18. With this step, the disk 15 bears against the base 19, as a result of which the disk 15 is held in its radial position.

The disc 15 also lies with its top in the direction of flight of the projectile 3 on the ceiling of a Collection space 21 in which the disc 15 is held laterally with little play. This collecting space 21 has one

Thickness, which, viewed in the direction of flight of the projectile 3, corresponds to at least twice the thickness of the edge region 17.

When the projectile 3 is fired and the propellant charge 6 ignites in accordance with regulations, a pressure builds up in the pressure chamber 8, the pressure finally increasing to such an extent that the connection between the cartridge case 2 and the projectile 3 is separated and the projectile 3 is expelled from the cartridge case 2 becomes. The projectile 3 is accelerated, and a swirl is imparted to the projectile by means of swirl bands 22 and the swirl trains of the launch run.

Due to the initial acceleration of the projectile 3, the predetermined breaking point 18 of the pane 15 breaks open, as a result of which the edge region 17 is moved against the bottom of the collecting space 21 and is preferably clamped in this position. For this, e.g. B. the side wall of the collecting space 21 is slightly conical to the inside or has slipped, etc. Due to the swirl acceleration, the central region 16 is then flung outwards from the position that locks the ignition chain and is also collected in the collecting space 21 above the edge region 17. The ignition chain is thus released in the area of the delay charge 13. The delay charge 13a can then ignite the delay charge 13b and this the active charge in the cargo space 10. For the over-ignition between the delay charges 13a and 13b, the delay charge 13a can have a conical recess in a known manner, through which the detonation waves within the delay charge 13a are focused and centered on the delay charge 13b and ignite it.

If the ignition of the propellant charge 6 is only incomplete and the delay charge 13 is still ignited, ie that the projectile does not emerge from the barrel of the weapon, then no initial acceleration occurs or a spin acceleration, so that the disc 15 remains in place and at the end of the burn

Delay charge 13a ignition of the delay charge

13b prevented. This does not mean that the active charge in the

Load space 10 detonated and projectile 3 can be removed from the barrel of the weapon without risk.

After the projectile 3 has been properly fired, in which the edge region 17 and then the central region 16 of the pane 15 are caught by the initial acceleration or the swirl in the collecting space 21, the delay charge 13a ignites the second delay charge 13b of the delay charge 13. Should then the impact detonator 11 does not function when the projectile 3 is impacted and thus the active charge in the cargo space 10 is not ignited, this is ignited after the delay charge 13b has burned down.

The igniter according to FIG. 1 is shown in FIG. 2 with a small modification of the disk 15. The circular disk 15 in turn consists of a central area 16 and an edge area 17 surrounding it, which is separated from the central area 16 by a predetermined breaking point 18 in the form of a notch. As can be seen from FIG. 3, the center of mass S of the central area 16 is located outside the longitudinal and swirl axis A of the projectile.

If, due to the initial acceleration, the edge area 17 is sheared off from the central area 16 and is received in the collecting space 21, the central area 16 is also very quickly removed from the ignition chain due to the eccentric position of the center of mass S, so that the latter is activated via the delay charges 13a and 13b can ignite.

In Figure 4, a disc 15 is shown with a central area 16 and an edge area 17, which over several Web 24 are connected to each other, the

Form predetermined breaking point 18.

FIG. 5 shows a disk 15, which in turn is constructed from a central area 16 and an edge area 17. The central area 16 and the edge area 17 are individual parts, i. H. in the simplest case, a small circular disk or an annular disk. The annular disk as the edge area 17 in turn has a greater thickness than the central area 16. The two individual parts 16 and 17 are connected to one another by a self-adhesive plastic film 25, which takes over the function of the predetermined breaking point 18. In the case shown in FIG. 5, the plastic film 25 is connected to the underside of the central area 16 and a step 26 in the edge area 17, so that when the edge area 17 is separated from the central area 16 during the initial acceleration of the projectile 3, the plastic film 25 also from the central area Area 16 is replaced. The central area 16 again preferably has a center of gravity S eccentric to the swirl axis A of the projectile 3, so that after the edge area 17 has been sheared off, the central area 16 is quickly conveyed into the collecting space 21.

It is of course possible to also attach the plastic film 25 to the upper side of the pane 15. In any case, the plastic film 25 is designed in such a way that it enables the delay charges 13a and 13b to ignite.

In all cases, the disk 15 should be made of a material with a low specific mass, so that the small disk accommodated in the collecting space 21 only exerts such a small imbalance on the projectile 3 according to the central area 16 that the trajectory of the projectile 3 does not is disturbed.

Of course, other embodiments of the invention, in particular the shape of the disc 15 are possible, for. B. elongated, rectangular or square discs.

Likewise, the base does not have to be a compact base 19, but can be z. B. several support points or

Support sections can be realized.

It is essential that the predetermined breaking point 18 of the disk 15 breaks open during the initial acceleration of the projectile 3 in the firing run, so that the central region 16, which interrupts the ignition chain, is then also quickly transported out of the ignition chain.

Claims

claims

1. Detonator for a projectile (3) to be fired from a tube with a twist, with an ignition chain that triggers an effect, a safety device (15, 19, 21) is provided which interrupts the ignition chain in a first position and when the projectile is fired ( 3) by its initial acceleration and its swirl into a second position releasing the ignition chain, the securing device (15, 19, 21) being a disk-shaped element (15) with a central region (16) and an edge region surrounding it

(17), characterized in that only the central area (16) interrupts the ignition chain, that the central area (16) of the disk-shaped element (15) but not the edge area (17) is supported by a holding device (19) and in place is held that the central region (16) and the edge region (17) over one at the

The predetermined breaking point (18) which tears open the initial acceleration of the projectile (3) are connected to one another and that a collecting space (21) is provided around the holding device (19), which serves to separate the peripheral region (16) separated from the central region (16) during the initial acceleration of the projectile (3). 17) and the central region (16) which is subsequently removed from the ignition chain by the swirl of the projectile (3).

2. Detonator according to claim 1, characterized in that the holding device (19) is a support surrounding the ignition chain for the central region (16), and that the edge region (17) has a step which rests on the support and thus the disk-shaped element

(15) in its first position, which disconnects the ignition chain.

3. Detonator according to claim 1 or 2, characterized in that the edge region (17) has a greater thickness than that Central area (16).

4. Detonator according to one of claims 1 to 3, characterized in that the collecting space (21) in the flight direction of the projectile (3) lies behind the edge region (17) and has a depth which is at least twice the thickness of the edge region (17) corresponds.

5. Detonator according to one of claims 1 to 4, characterized in that the edge of the disc-shaped element (15) in the first position lies against the side walls of the collecting space (21) with play.

6. Igniter according to one of claims 1 to 5, characterized in that for the disc-shaped element

(15) in the second position, in which it rests on the bottom of the collecting space (21), a holding, preferably clamping device is provided.

7. Detonator according to one of claims 1 to 6, characterized in that the center of mass (S) of the central region (16) is located eccentrically to the swirl axis (A) of the projectile (3).

8. Detonator according to one of claims 1 to 7, characterized in that the disc-shaped element (15) is circular or rectangular.

9. Detonator according to one of claims 1 to 8, characterized in that the disc-shaped element (15) is made of plastic.

10. Detonator according to one of claims 1 to 9, characterized in that the predetermined breaking point (18) is formed by reducing the thickness of the material of the disc-shaped element (15).

11. Detonator according to one of claims 1 to 10, characterized in that the central region (16) and the edge region (17) of the disc-shaped element (15) are connected to one another via webs (24) as a predetermined breaking point (18).

12. Detonator according to one of claims 1 to 9, characterized in that the central region (16) and the edge region (17) are each individual parts which are connected to one another by a connecting element which forms the predetermined breaking point (18).

13. Detonator according to claim 12, characterized in that the connecting element is a self-adhesive film (25).