CARTRIDGE CHAMBER AND CARTRIDGE CASE

Abstract

A cartridge chamber, specifically a cartridge chamber of a hand-held firearm for loading cartridges consisting of a bullet and a cartridge case comprising an inner surface of the cartridge chamber where the cartridge chamber in the direction from the barrel mouth, terminates with a head of the breechblock, where the inner surface of the cartridge chamber comprises at least one shaped recess for carrying out the marking of the cartridge case. A cartridge case, specifically a cartridge case of a cartridge, after shooting a bullet fired from the cartridge chamber, which contains on its outer surface at least one trace of the shaped recess of the inner surface of the cartridge chamber.

Claims

1. A cartridge chamber for a hand-held firearm for loading cartridges, comprising a bullet and a cartridge case including an inner surface of the cartridge chamber where the cartridge chamber, in the direction from a barrel mouth, terminates with a head of a breechblock, wherein the inner surface of the cartridge chamber includes at least one shaped recess configured to carry out marking of the cartridge case.

2. The cartridge chamber according to claim 1, wherein the shaped recess is arranged on the inner surface of the cartridge chamber so that the shaped recess is completely inside a space for placing the cartridge case.

3. The cartridge chamber according to claim 1, wherein the shaped recess is arranged on the inner surface of the cartridge chamber so that the shaped recess extends beyond a space in which the inner surface of the cartridge chamber abuts a wall of the cartridge case.

4. The cartridge chamber according to claim 1, wherein the shaped recess is in the form of a graphic and/or pictorial and/or alphanumeric character.

5. The cartridge chamber according to claim 1, wherein the shaped recess has a depth of at least 10 μm.

6. The cartridge chamber according to claim 2, wherein the shaped recess is configured to create a shaped trace on the cartridge case.

7. The cartridge chamber according to claim 3, wherein the shaped recess is configured to mark the cartridge case with residues of pressurised gases from a firing of a spent cartridge.

8. The cartridge chamber according to claim 1, wherein the shaped recess is made using stamping or chip machining and/or electroerosion machining and/or laser ablation.

9. The cartridge chamber according to claim 1, wherein the shaped recess is configured to be irremovable without damaging the firearm.

10. A cartridge case of a cartridge, along a bullet fired from a cartridge chamber according to claim 1 wherein the cartridge case contains on an outer surface of the cartridge case at least one trace of the shaped recess of the inner surface of the cartridge chamber.

11. The cartridge case according to claim 10, wherein the trace of the shaped recess of the inner surface of the cartridge chamber is a shaped trace.

12. The cartridge case according to claim 10, wherein the trace of the shaped recess of the inner surface of the chamber is a coloured gas trace of the residue from a pressurised gas after firing.

Description

OVERVIEW OF THE FIGURES

[0019] The invention will be further elucidated using drawings, in which

[0020] FIG. 1 shows a cartridge chamber with a cartridge which includes recesses for marking the cartridge cases with a gas trace created by residual pressurised gas after firing,

[0021] FIG. 2 shows a cartridge chamber with a cartridge, which includes a shaped recess to mark the cartridge with a shaped trace which is a mechanical deformation of the cartridge case, and

[0022] FIG. 3 shows a cartridge chamber with a cartridge which includes a shaped recess for marking the cartridge with both a gas trace as well as a shaped trace.

EXAMPLES OF THE PERFORMANCE OF THE INVENTION

Example 1

[0023] A cartridge chamber 1 of a hand-held firearm (FIG. 1) for loading cartridges 7 consisting of a bullet 6 and a cartridge case 5 comprising an inner surface 2 of the cartridge chamber 1 where the cartridge chamber 1, in the direction from the barrel mouth 13, terminates with a head 3 of the breechblock.

[0024] The inner surface 2 of the cartridge chamber 1 comprises a plurality of shaped recesses 4 for carrying out marking 10 of the cartridge case 5, where the shaped recesses 4 are arranged on the inner surface 2 of the cartridge chamber 1 so as to extend beyond the space 8 in which the inner surface 2 of the cartridge chamber 1 abuts the wall of the cartridge case 5. The shaped recesses 4 are arranged for marking 10 the cartridge 5 with residual 15 pressurised gases burning from the spent cartridge 7, with these residual 15 pressurised gases creating carbon prints.

[0025] The shaped recesses 4 form a so-called bar code which consists of graphical and alphanumeric characters.

[0026] The shaped recesses 4 have a depth in the range of 10 to 50 μm and are made by electroerosion machining. Alternatively, the recesses 4 may be stamped and/or chipping machined and/or laser ablated.

[0027] The shaped recesses 4 are made to be irremovable without damaging the weapon.

[0028] The cartridge case 5 along the bullet 6 fired from the cartridge chamber 1 comprises on its outer surface 11 a plurality of traces 14 of the shaped recesses 4 of the inner surface 2 of the cartridge chamber 1. These traces 14 are coloured gas traces 12 of the residual 15 pressurised gases after firing, they are in essence, carbon prints by means of which a barcode (not shown) consisting of graphical and alphanumeric characters is created.

Example 2

[0029] A cartridge chamber 1 of a hand-held firearm (FIG. 2) for loading cartridges 7 consisting of a bullet 6 and a cartridge case 5 comprising an inner surface 2 of the cartridge chamber 1 where the cartridge chamber 1, in the direction from the barrel mouth 13, terminates with a head 3 of the breechblock.

[0030] The inner surface 2 of the cartridge chamber 1 comprises a plurality of shaped recesses 4 for carrying out marking 10 of the cartridge case 5, where the shaped recesses 4 are arranged on the inner surface 2 of the cartridge chamber 1 so that they are completely inside the space 8 for loading the cartridge case 5. The shaped recesses 4 are provided to create shaped traces 9 on the cartridge case 5 by means of an overpressure 16 of gas, these shaped traces 9 forming on the cartridge case 5, a plurality of small protrusions.

[0031] The shaped recesses 4 create an image character and several alphanumeric characters.

[0032] The shaped recesses 4 have a depth of approximately 20 μm, and are made by laser ablation. Alternatively, the shaped recesses 4 may be stamped and/or chipping machined and/or electroerosion machined.

[0033] The shaped recesses 4 are made to be irremovable without damaging the weapon.

[0034] The cartridge case 5 of the cartridge 7 along the bullet 6 fired from the cartridge chamber 1 comprises on its outer surface 11 a plurality of traces 14 of the shaped recesses 4 of the inner surface 2 of the cartridge chamber 1, the shaped traces 9 being small protrusions created by the mechanical deformations of the outer surface 11 of the cartridge case 5 which create a single image character and several alphanumeric characters.

Example 3

[0035] A cartridge chamber 1 of a firearm (FIG. 3) for loading cartridges 7 consisting of a bullet 6 and a cartridge case 5 comprising an inner surface 2 of the cartridge chamber 1 where the cartridge chamber 1, in the direction from the barrel mouth 13, terminates with a head 3 of the breechblock.

[0036] The inner surface 2 of the cartridge chamber 1 comprises a plurality of shaped recesses 4 for carrying out marking 10 of the cartridge case 5, where the shaped recesses 4 are arranged on the inner surface 2 of the cartridge chamber 1 so that they extend beyond the space 8 in which the inner surface 2 of the cartridge chamber 1 abuts the wall of the cartridge case 5. The shaped recesses 4 for carrying out marking 10 of the cartridge case 5 with the residual 15 gases from the burning of the spent cartridge 7, with these residual 15 pressurised gases creating carbon prints. These shaped recesses 4 form an alphanumeric code consisting of alphanumeric characters.

[0037] At the same time, further shaped recesses 4 are arranged on the inner surface 2 of the cartridge chamber 1 so that they are entirely within the space 8 for placement of the cartridge case 5. These shaped recesses 4 are provided to create shaped traces 9 on the cartridge case 5 by means of an overpressure 16 of gas while forming on the cartridge case 5, a plurality of small protrusions. These shaped recesses 4 form an image symbol.

[0038] The shaped recesses 4 have a depth in the range of 10 to 60 μm and are made using electroerosion machining and laser ablation.

[0039] The shaped recesses 4 are made to be irremovable without damaging the weapon.

[0040] The cartridge case 5 of the cartridge 7 along the bullet 6 fired from the cartridge chamber 1 comprises on its outer surface 11 a plurality of traces 14 of the shaped recesses 4 of the inner surface 2 of the cartridge chamber 1 these traces 14 creating both coloured carbon residues 15 of the pressurised gases after firing which produces on the outer surface 11 of the cartridge case 5 an alphanumeric code consisting of alphanumeric characters. Further traces 14, which are shaped traces 9 in the form of small protrusions formed by mechanical deformations of the outer surface 11 of the cartridge case 5, then form an image symbol on the outer surface 11 of the cartridge case 5.

INDUSTRIAL APPLICATION

[0041] The cartridge chamber and the cartridge according to the invention can be used to simplify the identification of the firearm from which it was fired, which greatly simplifies the identification of the perpetrator of a criminal offence.