Shotgun-Barrel Projectile with Intercalaction and Cartridge

Abstract

The invention relates to a ball cartridge (1) for a shotgun with an intermediate means (2) which can be built into a cartridge (20). The bullet (1) has a cylindrical free area (10) on the lower side thereof and the intermediate means (2) is embodied as a piston (21) on the end thereof facing the bullet (1) and the diameter thereof is adapted to the free area (10). In order to provide a solid link between the bullet (1) and the intermediate means (2), the bullet (1) is placed on the piston (21) or vice-versa and is pushed into the free area (10) and wedged during the piston (21) shot.

Description

The invention will be elucidated in more detail in the following on the basis of Figures.

FIG. 1 shows, in a cross-section through a cartridge 20, a shotgun-barrel projectile 1 according to the invention with an intercalation 2 inserted in a cartridge case 26. A propelling charge 27 is arranged below the intercalation 2.

FIG. 2 shows this cartridge 20 shortly after the detonation of the propelling charge 27 before the projectile 1 has left the cartridge 20. The upper part of the intercalation 2, taking the form of a plunger 21, has been inserted into the projectile 1 and is also wedged there (see description below).

FIG. 3 shows the cartridge 20 after the end of the cartridge case 26 facing in the direction of firing has burst open.

The cartridge 20 shown in FIGS. 1 to 3 will be elucidated in more detail in the following.

The material of the shotgun-barrel projectile 1 consists of Pb (lead) or of a readily deformable material (see FIG. 1). A bevel 3 with adjoining shoulder 4 has been introduced at the upper end of the projectile 1. In the course of assembly—i.e. doubling-back of the cartridge case 26 inwards by 180° for the purpose of holding the projectile 1 in place—the bevel 3 serves as a guiding aid. The shoulder 4 centres the case 26, and the adjacent plane face 5 extending perpendicular to the axis of symmetry 22 provides for a firm seating of the projectile 1 in the cartridge case 26.

In the course of firing, the shoulder 4 with the plane face 5 consequently has the advantage that the case 26 is held in place until snapping open, and the projectile 1 is thereby centred in the case 26 and also remains centred until leaving the cartridge case 26 (improved hit pattern).

The intercalation 2 consists of plastic, the front part taking the form of a plunger 21, and in the rear part has an obturation aid 6 which prevents a leakage of the propellant charge 27—or, to be more precise, of the gases thereof—in the direction of the projectile 1 after detonation has taken place. In the front region the intercalation 2—or, to be more precise, the plunger 21—has a shoulder 7 which centres the projectile 1 with the intercalation 2. The adjoining large diameter (projectile diameter) of the ring 8, which in this embodiment is connected to the plunger 21 in one piece via an incorporated predetermined breaking-point 9, serves as an assembly stop in the course of mounting the projectile 1 onto the plunger 21 (projectile seating—retracted case). In the course of firing, the predetermined breaking-point 9 provides for a uniform build-up of pressure. After the ring 8 has been sheared off by the pressure of the propelling gases that builds up, the plunger 21 is pushed into the free space 10 of the projectile 1. The sheared-off ring 8 is pressed rearwards in the direction of the obturation aid 6 by the projectile 1 on the centring diameter 11 or on the plunger 21. In this description, the terms “downwards” and “rearwards” are always understood to mean the end opposed to the direction of firing.

When the projectile 1 is telescoped together with the intercalation 2—or, to be more precise, with the plunger 21—a projectile spigot 12 with incorporated bevel 13 and bore 14 is pushed into the bore 15 in the plunger 21 with incorporated diameter reduction 16 and with a hemisphere 17 at the bottom of the bore 15. Once the plunger 21 has travelled a certain distance in the direction of the projectile 1, the bevel 13 comes into contact with the hemisphere 17. From this time until the abutment of the upper side 18a of the plunger against the bottom 18 of the free space 10 (initial motion of the projectile), the material of the projectile is pressed into the diameter 19 which becomes larger again. In this way, the desired connection arises, which can no longer be released. The projectile spigot 12 with its bore 14, and the bore 15 with the hemisphere 17 are arranged on the axis of symmetry 22. The diameter of the projectile spigot 12 in the region of the bore 14 is somewhat reduced in comparison with the diameter of the bore 15 in the plunger 21 and corresponds approximately to the diameter created by the diameter reduction 16.

The height of the firm connection between the plunger 21 and the ring 8 determines the gas pressure at which the rupture of the ring 8 takes place. The build-up of pressure in the powder chamber, where the propelling charge 27 is located, determines the rupture of the ring 8 at the predetermined breaking-point 9 and consequently releases the intercalation 2 with the plunger 21. The ring 8 is able to move rearwards on the diameter 11 in a centred manner. The plunger 21 is pushed into the projectile 1, which is held in place by the case 26 which is retracted by 180° at the upper end.

After a certain distance, the bevel 13 impinges on the hemisphere 17 and presses the material located on the bevel 13 into the diameter 19 that becomes larger again. In this way, a firm connection arises between the projectile 1 and the plunger 21. If the two faces 18 and 18a abut in a positive manner, the projectile 1 is set in motion contrary to the force of the retracted case 26.

In the process, the case 26 is peeled upwards by the shoulder 4 and by the plane face 5 and additionally centres and stabilises the projectile 1 in the case 26 until said projectile leaves the case 26. This is the prerequisite for a stable flight within and outside the barrel. But only the fully coordinated system guarantees the desired precision.

Advantages of the invention are:

• • Centred and stabilised projectile 1 in the case 26 by virtue of the shoulder 4
  • A stable intercalation 2 made of plastic
  • Uniform build-up of pressure by virtue of the predetermined breaking-point 9 on the ring 8
  • Centring of the intercalation 2 and of the projectile 1
  • Additional stabilisation by virtue of the sheared-off ring 8
  • Firm connection between projectile 1 and intercalation 2—or, to be more precise, plunger 21 (no deflection errors as a result of detachment of the intercalation 2 from the projectile 1).

FIG. 4 shows an embodiment in which the ring 8 is L-shaped and with one shank 8a encompasses the projectile 1 almost as far as the nose of the projectile. By virtue of this measure, the abrasion of Pb in the barrel is minimised, since the projectile 1 comes into contact with the barrel only in the upper region.

Claims

1. A shotgun-barrel projectile (1) with an intercalation (2) for fitting into a cartridge (20), the projectile (1) exhibiting a cylindrical free space (10) on its underside, and the intercalation (2) taking the form of a plunger (21) at its end facing towards the projectile (1), this plunger having a diameter adapted to the free space (10), characterised in that the projectile (1) is mounted onto the plunger (21), or conversely, and the plunger (21) is inserted into the free space (10) and wedged in the course of firing.

2. A shotgun-barrel projectile according to claim 1, characterised in that the free space (10) exhibits a projectile spigot (12) arranged on the axis of symmetry (22),the plunger (21) exhibits a bore (15) arranged on the axis of symmetry (22),the projectile spigot (12) and the bore (15) are substantially adapted to one another in diameter, andthe projectile spigot (12) and the bore (15) are endowed with wedging elements (13, 16, 17) which in the course of firing and insertion of the plunger (21) into the free space (10) bring about a wedging of the plunger (21) and therefore of the intercalation (2) with the projectile (1).

3. A shotgun-barrel projectile according to claim 2, characterised in that the wedging elements (13, 16, 17) include a hollow cylindrical design of the end of the projectile spigot (12) facing towards the intercalation, the underside of the projectile spigot (12) exhibiting an inwardly inclined bevel (13), the bore (15) in the plunger (21) exhibiting a hemisphere (17) arranged at the bottom, and, in addition, a diameter reduction (16) being arranged on the wall of the bore (15) above the hemisphere (17).

4. A shotgun-barrel projectile according to claim 1, characterised in that a ring (8) is connected to the plunger (21) on the outer periphery of the plunger (21) via a predetermined breaking-point (9).

5. A shotgun-barrel projectile according to claim 4, characterised in that the ring (8) is formed in one piece with the plunger (21).

6. A shotgun-barrel projectile according to claim 4, characterised in that ring (8) constitutes a stop for the projectiles base (23).

7. A shotgun-barrel projectile according to claim 4, characterised in that the ring (8) is L-shaped and with one shank (8a) encompasses the projectile (1) almost as far as the nose of the projectile.

8. A shotgun-barrel projectile according to claim 7, characterised in that the one shank (8a) exhibits an inward-facing projection (24) which engages a corresponding recess (25) in the projectile (1).

9. A shotgun-barrel projectile according to claim 1, characterised in that the nose of the projectile merges, via a bevel (3) with adjoining shoulder (4) running parallel to the axis of symmetry (22), with a plane face (5) running perpendicular to the axis of symmetry (22) and extending as far as the outer periphery of the projectile (1).

10. A shotgun-barrel projectile according to claim 1, characterised in that the intercalation (2) consists of a plastic material and the projectile (1) consists of a readily deformable material, preferably lead.

11. A cartridge with a cartridge case (26) and with a propelling charge (27), characterised in that a shotgun-barrel projectile (1) with an intercalation (2) according to claim 1 is mounted on the propelling charge (27).

12. Cartridge according to claim 11, characterised in that the upper end of the cartridge case (26) is retracted inwards by 180° and rests on the plane face (5).