RU187763U1 - CARTRIDGE OF THE AUTOMATIC FIRE-SHOT WEAPON BARREL - Google Patents

Abstract

The utility model relates to the field of small arms, namely, to the design of the chamber of the barrel of an automatic firearm. The chamber 1 of the barrel 2 of an automatic firearm contains external longitudinal grooves 3, intended for the removal of powder gases from the bullet entrance and associated supply holes 4, at least some of which are connected with the internal grooves 5, providing a supply of powder gases to the outer surface of the wall of the sleeve 6 The chamber 1 can be made in the form of a separate removable element or made integral with the barrel 2 mounted, for example, in the sleeve 7. The inlet holes 4 can be made in plan at an angle α to the the axis of the trunk, the value of which lies in the range of 20-90 °. The holes 8, the exhaust powder gases from the bullet inlet, can be made in plan at an angle β to the longitudinal axis of the barrel, the value of which lies in the range of 20-90 °.

Due to the implementation in the chamber of the internal longitudinal grooves 5, a sufficiently large backpressure zone is provided that acts on the outer surface of the wall of the sleeve 6, which provides it with a "floating" position during firing and longitudinal mobility. And due to a change in the supply of powder gases to the internal grooves 5, the probability of clogging is reduced, and even if there are foreign particles in the groove 5, part of it will still work, and when the sleeve is removed after the shot, the internal grooves 5 are easily cleaned by the residual pressure of the powder gases. 4 s.p. f-ly, 12 ill.

Description

The invention relates to the field of small arms, namely, to the design of the barrel chamber of an automatic firearm.

The design of automatic and other firearms is known (see, for example, the description of the UK patent for invention No. 8943 with a convention priority of 06/18/1914). In this weapon in the chamber of the barrel, grooves are made in the form of longitudinal grooves providing the supply of powder gases from the bullet entrance to the outer surface of the sleeve wall. Thus, due to the equality of pressure from the inside and the outside of the sleeve, it gets the possibility of easy longitudinal movement, which is especially important in weapons using automation with free or semi-free bolts, where the sleeve is the leading link in automation. However, in the event of a clogging of the discharge grooves of the chamber, the automatic weapon ceases to function. Further development of this design of the chamber can be considered technical solutions related to the method and device providing easy extraction of cartridges from the barrel of a weapon (see, for example, the description of the UK patent for invention No. 605136 with priority dated 12/14/1945). The patent describes a wide range of structural designs for the discharge grooves of the chamber, but, like their ancestor, in the event of clogging of the grooves, the automatic weapon ceases to function.

The design of the barrel of a firearm is known (see, for example, the description of the UK patent for invention No. 1208361 with a convention priority of 03/08/1967). The barrel chamber is made in cross section in the form of a regular polygon, the center of which is on the longitudinal axis of the barrel. The outer surface of the sleeve wall touches the middle of each side of the polygon, and the corners of the polygon are, in fact, discharge grooves. Due to this form of the chamber, it is less prone to clogging as a powder deposit, and external weeds in adverse conditions, but is not completely devoid of this drawback. In addition, the manufacture of such a chamber is a technologically challenging task.

A known design of the chamber of automatic weapons (see, for example, the description of the German patent for the invention No. 548102 with a priority of 06/12/1930). The chamber is a separate element of the barrel. The chamber is made with external longitudinal grooves discharging powder gases from the pool entrance zone and guiding them through the supply holes to the outer surface of the sleeve wall. This design makes the chamber less sensitive to external weeds, however, backpressure is transmitted to the sleeve only in the areas of the supply openings.

A further development of this design is a chamber made at the same time with the barrel (see, for example, the description of the German patent for invention No. 603190 with priority dated 02.17.1933), which has the same advantages and disadvantages as the ancestor.

The purpose of the utility model is to create an unloaded chamber, which, while maintaining the advantages of the prototype for a low tendency to clogging, would provide a large unloaded sleeve area during operation, while maintaining its longitudinal mobility even in difficult operating conditions.

To do this, in the chamber of the barrel of an automatic firearm containing external longitudinal grooves for the removal of powder gases from the zone of the pool entrance and the associated supply holes, at least some of them are connected with the internal longitudinal grooves supplying powder gases to the outer surface of the liner wall.

Due to the implementation of internal longitudinal grooves in the chamber, a sufficiently large backpressure zone of the sleeve acting on the external surface of the wall is provided, which provides it with a “floating” position during firing and longitudinal mobility. By changing the supply of powder gases to the internal grooves (from the chain of supply holes, and not directly from the pool entrance), the likelihood of clogging of the internal grooves is reduced, and even if there are foreign particles in the groove, part of it will still work, and if the sleeve is removed after shots, internal grooves are easily cleaned by the residual pressure of the powder gases.

The proposed chamber can be made in the form of a separate removable (detachable) element or along with the body of the barrel.

The supply holes can be made in plan at an angle α to the longitudinal axis of the barrel, the value of which lies in the range of 20-90 °. The implementation of the supply holes in the plan at an angle to the longitudinal axis of the barrel allows not only to create a buoyant force acting on the sleeve 6, but also to purge the inner surface of the chamber in the direction of its entrance with the residual pressure of the powder gases when removing the sleeve, which leads to the removal of weeds from the chamber.

The holes for discharging powder gases from the pool entrance can be made in plan at an angle β to the longitudinal axis of the barrel, the value of which lies in the range of 20-90 °. The implementation of the outlet holes in the plan at an angle to the longitudinal axis of the barrel can reduce their clogging by the particles of the shell of the bullet upon contact.

in FIG. 1 - a General view of the chamber made in the form of a separate removable element;

in FIG. 2 is a view B in FIG. one;

in FIG. 3 is a section AA in FIG. 1 (chamber with alternating internal grooves and feed holes);

in FIG. 4 is a section BB in FIG. 1 (chamber with alternating internal grooves and feed holes);

in FIG. 5 is a section GG in FIG. 2 (chamber with alternating internal grooves and feed holes);

in FIG. 6 is a section AA in FIG. 1 (chamber with internal grooves);

in FIG. 7 is a section BB in FIG. 1 (chamber with internal grooves);

in FIG. 8 is a section GG in FIG. 2 (chamber with internal grooves);

in FIG. 9 is a longitudinal section of a barrel with a mounted chamber and a cartridge installed therein;

in FIG. 10 is a longitudinal section of the barrel with a chamber made at the same time (with alternating internal grooves and feed holes) mounted in the sleeve;

in FIG. 11 is a longitudinal section of the barrel with a chamber made integral with it and a cartridge installed therein;

in FIG. 12 is a General view of the barrel with a chamber made at the same time with it.

The chamber 1 of the barrel 2 of an automatic firearm contains external longitudinal grooves 3 intended for the removal of powder gases from the bullet inlet, and related supply holes 4, at least some of which are connected with the internal grooves 5 providing the supply of powder gases to the outer surface of the wall of the sleeve 6.

The chamber 1 can be made in the form of a separate removable element (see, for example, Fig. 1 - Fig. 9) or at the same time with the barrel mounted, for example, in the sleeve 7 (see, for example, Fig. 10 - Fig. 12) .

The inlet holes 4 can be made in plan at an angle α to the longitudinal axis of the barrel, the value of which lies in the range of 20-90 °. The implementation of the supply holes 4 in plan at an angle to the longitudinal axis of the barrel allows not only to create a buoyant force acting on the sleeve 6, but also to purge the inner surface of the chamber in the direction of its entrance by the residual pressure of the powder gases when removing the sleeve, which leads to the removal of weeds from the chamber.

Holes 8 exhaust powder gases from the bullet inlet can be made in plan at an angle β to the longitudinal axis of the barrel, the value of which lies in the range of 20-90 °. The implementation of the outlet holes in the plan at an angle to the longitudinal axis of the barrel can reduce their clogging by the particles of the shell of the bullet upon contact.

Consider the operation of automatic small arms with the proposed design of the chamber.

We consider the following conditions for consideration. The cartridge is located in the chamber 1 of the barrel 2, the hammer hit the cartridge’s capsule, the powder ignited in the sleeve and, under the influence of the increasing pressure of the powder gases, the bullet begins to move.

After the bullet completely leaves the sleeve 6 and begins to cut into the grooves of the barrel 2 with its shell, the powder gases will be able to get into the external grooves 3 of the chamber 1, and then, through the supply holes 4, to the internal grooves 5. Pressure from the powder gases in internal grooves 5 is transmitted to the outer surface of the wall of the sleeve 6. Thus, the equality of pressure from the inner and outer sides of the wall of the sleeve 6 is ensured and the force of the pressing wall of the sleeve 6 to the inner surface is significantly reduced atronnika 1. The sleeve 6 into a "floating" mode, which allows her to longitudinal mobility, which is an important factor affecting the performance of weapons uses automation based on free or delayed blowback, where the sleeve is a leading automation link.

The sleeve 6 begins to move in the direction opposite to the movement of the bullet, while it transfers its force to the shutter cup (not shown) with its bottom, actuating the locking mechanism of the weapon to unlock. After the bullet leaves the barrel 2, the weapon bolt is fully unlocked and rolled back, compressing the return spring (not shown) and removing the fired sleeve 6 from the cartridge chamber 1. At the same time, due to the inclination of the supply holes 4, the inner surface of the chamber 1 and grooves 5 are blown by the residual the pressure of the powder gases in the direction of the chamber entrance, removing possible external weeds (grains of sand, earth, etc.) from it.

Thus, due to the implementation of internal longitudinal grooves 5 in the chamber, a sufficiently large backpressure zone of the sleeve 6 acting on the external surface of the wall is provided. The supply of powder gases to the internal grooves 5 through the supply holes 4 and external grooves 3 associated with the pool entrance, and not directly from a bullet entrance, as suggested, for example, in British patent for invention No. 605136, makes the proposed design of the chamber 1 less sensitive to clogging of the internal grooves 5, and even if they are present ostoronnih particles of their still continue to operate, and the extraction of the sleeve 6 after the shot, the groove 5 can be easily cleaned residual pressure of powder gases.

Claims (5)

1. The chamber of the barrel of an automatic firearm containing external longitudinal grooves for the removal of powder gases from the zone of the pool entrance and associated supply holes, characterized in that at least part of the supply holes is also connected with the internal longitudinal grooves providing the supply of powder gases to the outer surface the walls of the sleeve. 2. The chamber of the barrel according to claim 1, characterized in that it is removable. 3. The chamber of the barrel according to claim 1, characterized in that the chamber is made integral with the barrel. 4. The barrel chamber according to claim 1, characterized in that the supply holes can be made in plan at an angle α to the longitudinal axis of the barrel, the value of which lies in the range of 20-90 °. 5. The chamber of the barrel according to claim 1, characterized in that the holes discharging the powder gases from the bullet inlet can be made in plan at an angle β to the longitudinal axis of the barrel, the value of which lies in the range of 20-90 °.

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