Rifled weapon identification system

FIELD: designing and production of piece firearm, applicable for identification of the barrel of a rifled firearm manufactured by small lots.

SUBSTANCE: the rifled weapon barrel is made at least with one marking element on its inner surface leaving traces on the bullet at a shot. At least one rifle with a changed shaped of cross-section is used as the marking element, variation of the rifle width does not exceed 6.4%, and that of the depth - 8.7% of the initial value of the barrel rifles.

EFFECT: provided identification of barrels of the rifled weapon, preferably manufactured by small lots.

3 cl, 3 ex

 

The invention relates to the design and production of a piece of firearms and can be used for identification of the barrel rifled small arms manufactured in small batches.

Well-known classical method of identification of the barrel rifles (Kustanovich S.D. Forensic ballistics. M: Legal literature, 1956, p.24-27). According to a known method carried out a comparison of the two bullets, one of which obviously westralian of the test barrel, and the second is presumably westralian of the test barrel. The comparison is carried out, in General, the number and width of traces of the fields of the grooves, the direction and angle of inclination. In addition, compare the shape and size of the individual tracks, the configuration of the projections and depressions, as well as their mutual arrangement - i.e. the elements inherent in the individual barrel rifle.

The disadvantage of this method should recognize the need for the expert ballista barrel (or bullets)that can be used as an element of comparison. In the absence of the barrel or bullet examination cannot be performed.

Also known construction the barrel (RU, patent 2148769, 2000), containing on the inner surface of the cover, ensuring the implementation of a set of microelements in the side surface of the pool is by passing it on to the target during the shot, allowing by chemical analysis of the surface of the bullet, and surfaces in contact with the bullet after firing, to determine the qualitative and quantitative composition of the established elements and, therefore, the trunk from which a shot was fired.

This method of marking is not useful to identify the barrels of weapons, because there is currently not known how precise application on the internal surface coatings.

Also known construction rifled barrel (US, 4175346, 1979). Proposed to be applied to the inner surface of the barrel rifled weapons additional marking elements, leaving traces on the pool, which can be identified as individual characteristics of the barrel rifled weapons.

A disadvantage of known construction admittedly not take into account the impact of the additional marking elements on ballistic weapons.

The closest analogue of the claimed invention can recognize the design of barrel rifle (RU, patent 2212609, 2003). There is a construction barrel rifle contains on its inner surface, at least one marking element, leaving the shot on the pool traces that can be identified as individual code of the trunk, and as specified marcinowicz the th element used field between adjacent grooves, width different from the width of other fields, and change the width ranges from 2.8 to 5.7% of the width of the field, defined as the difference between the circumference of the barrel and the total width of the grooves, divided by the number of fields.

A disadvantage of the known design of the barrel rifles admittedly small number of weapons that can be marked up in this way without sacrificing ballistic performance of the weapon.

The technical problem to be solved by the present invention is to provide opportunities for marking barrels of rifles, preferably produced in small batches.

The technical result obtained by implementing the proposed design is to provide for the identification of rifled weapons.

To achieve the technical result of the proposed use of the system identification of rifles, containing on the inner surface, at least one marking element, leaving the shot on the pool traces to identify the trunk, and as specified marking element used cross-sectional shape, at least one of the grooves, thus changing the width of the grooves should not exceed 6.4% of the original value, and the depth of the thread - 8.7% of the initial the note.

To expand the number marked in a similar way rifled weapons as specified marking element can be used cross-sectional shape of the two grooves. For even greater expansion in the number marked in a similar way weapons as additional marking element may be used, the distance between the longitudinal axes of these grooves.

Currently fighting fire rifles contains at least three thread which may have in cross section a triangular, rectangular or trapezoidal. By changing the ratio of the base and a height of at least one thread, you can mark a small number of firearms rifles. By changing the ratio of the base and height of the two grooves with different combinations, you can mark a significant number of firearms rifles. If the distance between the grooves with a modified cross-section geometry can significantly expand the number of units marked small arms.

Execution method of rifling on the inner surface of the barrel is no different from the traditional way of execution of rifling used in the production of rifled weapons.

it was established Experimentally by ballistic characteristics manufactured with the proposed identification labels barrels of rifles, for high quality (accurate) shooting changing the width of the grooves should not exceed 6.4% of the original value, and the depth of the thread - 8.7% of the original values.

Because of the possibility of such marking rifled barrels are rather limited, it can be applied to types of weapons produced in small batches.

Each such rifled barrel after fabrication passes the shooting, during which define the configuration changes to the surface of the bullet. The obtained information is stored in the database factory, as well as in the database of the internal Affairs bodies. Upon detection of a bullet fired from such a barrel rifled weapons, define a specific trunk, from which it was released. This facilitates the investigation of crimes.

Below are examples of the implementation of the proposed system identification rifle.

1. The barrel of the gun 7.62 contains three thread having a sectional shape of an isosceles triangle, each of which has a width of 1.4 mm and a depth of 1.8 mm, the First thread was changed, and its dimensions were: width of 1.35 mm, depth - of 1.86 mm, the second thread is 1.35 mm, depth of 1.75 mm, and the distance between the longitudinal axes of these grooves was increased by 4%.

2. The barrel of the gun 5.45 contains three thread having in cross section the shape of pramogos is nick, each of which has a width of 1.2 mm and a depth of 1.5 mm, the First thread was changed, and its dimensions were: width - 1,22 mm, depth - of 1.46 mm, the second thread is 1.15 mm, the depth of 1.55 mm, the distance between the longitudinal axes of these grooves has been increased by 3.5%.

3. The barrel sniper rifle caliber 9,00 contains three thread having a sectional shape of an isosceles triangle, each of which has a width of 1.6 mm and a depth of 2.0 mm, the First thread was changed, and its dimensions were: width of 1.65 mm, depth - 1,95 mm, the second thread - 1,55 mm, depth of 2.05 mm, the distance between the longitudinal axes of these grooves was increased by 7%.

These design changes of the barrel rifles practically does not change its ballistic characteristics, but is easily able to identify the trunk, which was released bullet.

1. The barrel is rifled weapons, made with at least one marking element on its inner surface, leaving the shot on the pool traces, characterized in that the marking element is used, at least one thread with a modified cross-sectional shape, thus changing the width of the thread does not exceed 6.4%, and the depth of 8.7% from the original value of the rifling of the barrel.

2. Barrel according to claim 1, characterized in that, as specified marking element and is used two thread.

3. Barrel according to claim 2, characterized in that as an additional marking element is used the distance between the longitudinal axes of the grooves.



 

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