CZ20003765A3 - Firearm with at least two barrels with adjustable geometry and method and adjustment of this geometry - Google Patents

Abstract

Firearm has two superposed barrels (1, 2) attached by central band (3). Band is brazed with silver along nearly whole length of upper barrel (1), and only along small part of lower barrel (2). At end of firearm, barrels are kept apart using ring (5) slid on lower barrel, and resting against shoulder (6). Ring is located between shoulder and muzzle (7). Muzzle is kept in place using screw. Screw goes through spacer between part (8) of muzzle, and band; width of spacer determines relative position of barrels in lateral direction. Independent claims are also included for (a) the method for adjusting geometry of front barrels, and for (b) the adjusting mechanism.

Description

Technical field

The invention relates to a firearm with at least two barrels lying one above the other or side by side with adjustable geometry, which are connected to each other by at least one belt.

For these weapons, the difference between the point of hit of the projectile fired from the first barrel and the point of hit of the projectile fired from the second barrel must be limited. Permitted standards over a predetermined distance, for example 60 m, are such that this difference practically does not exist.

This, therefore, requires accurate adjustments of the main geometry at the factory or on a tester for barrel firearms.

BACKGROUND OF THE INVENTION

With known weapons of this type, one (or more) strip (s) is / are soldered to the barrel up to the barrel orifice, and the adjustability takes place during successive shots. Subsequently, one or more strip (s) are desoldered, the pad is used to set and re-solder one or more strip (s).

Adjustability of convergence and precision of the main was therefore a manual operation with subsequent firing in the tunnel and it is therefore clear that this operation is very laborious and expensive. In addition, subsequent soldering and desoldering may affect the firing characteristics of the barrel.

In other barrels, one or more strip (s) terminate at a certain distance from the barrel mouth and the adjustment device is screw-regulated and located between the parts in front of the barrels.

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In particular, they are soldered to one or more strip (s) in a manner as before, where the strip (s) is / are not present, they mainly converge too much unless they are necessarily stretched apart, especially by using a special adjustment device.

In some cases, one or more strip (s) is / are replaced by one or more struts.

These adjustment devices are quite complex. Normally, they only allow to adjust the distance between the barrels and not their relative lateral position relative to the belt, as some systems, usually complex, allow for height and lateral adjustability.

SUMMARY OF THE INVENTION

The object of the invention is to eliminate the previous drawbacks and to obtain a weapon with at least two barrels which allows relatively simple and quick adjustability of the main geometry, but without its construction being too complex.

This object is achieved according to the invention in a firearm with at least two barrels connected to each other by at least one belt whose connection ends before the mouth of the barrel, the parts in front of the barrels being convergent if not forcedly extended. barrel almost to its mouth, but is not attached to the other barrel to the mouth. barrel, the second barrel is wrapped around the front by a ring that separates it by elastically curving the first barrel belt and the sleeve is removably attached to the second barrel at the outermost limit in front of the weapon. with this belt.

The convergence of the barrel is not entirely excluded and the cradles, by which the belt-to-barrel contact areas are meant, form an angle so as to ensure sufficient convergence of the barrel to the mouth and to avoid interference with the hit.

The outer surface rings concentric with its inner surface.

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In this case, the main geometry depends on the choice of the ring and the sleeve or spacers except for the user-caused defects in this geometry. After eventual dismantling of the device, it is sufficient to re-attach the ring and the sleeve and possibly the expansion to obtain the correct main geometry again and no further adjustment is necessary. The setting may change with the washer, which may damage the adjustment device and must be readjusted after removal.

The aforementioned part of the sleeve may be fastened to the belt, for example by a screw at the location where the sleeve is opened, the opening of the sleeve being dimensioned to allow a screw connection for different distances between the barrels.

The ring should be placed on the barrel between the sleeve and the arm, which is formed by one part of the belt.

The invention also relates to a method of adjusting the geometry of the front of a weapon with two barrels connected to each other by at least one belt that does not reach the mouth of the barrel.

This method is characterized in that:

if the barrels are arranged one above the other, side or side by side, a special ring of a series of multiple rings with outer different diameters, which have the function of height adjustment, is gradually moved along the loose barrel, then fired from a gun with two barrels up to an acceptable deviation , and moving the sleeve along a portion of the belt on the front outer side of the barrel mentioned above, a special spacer from a series of spacers of different thickness is inserted between this portion and the belt, for lateral adjustment if they are mainly one above the other or height if they are mainly adjacent itself, then fired from a weapon with two barrels up to a deviation that is acceptable, or moves on the front outside of the aforementioned barrel of a particular nozzle from a series of nozzles having the aforesaid parts modified at different distances from their geometric axes, function already mentioned which is acceptable.

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The aforementioned part should be placed in a removable manner on the belt either directly or by inserting a spacer.

The invention also relates to an adjustment device used in the method.

The adjusting device according to the invention represents a series of rings with different outer diameters or sleeves adaptable to the aforementioned barrel with a series of spacers for insertion between the belt and said part of the sleeve or series of sleeves which are already spaced apart by their washer .

BRIEF DESCRIPTION OF THE DRAWINGS

By way of illustration, some examples of embodiments of a firearm with at least two adjustable barrel barrels are provided, and the method and apparatus for adjusting this geometry described in accordance with the invention below, without limiting the invention, referring to the accompanying drawings in which:

figure 1 shows a side schematic view of the weapon according to the invention figure 2 shows on an enlarged scale the part described as F2 in figure 1 figure 3 shows a section II-III of figure 2 on a larger scale figure 4 shows section IV-IV of figure 2 on the same scale as Figure 3 Figure 5 shows a cross-section of Figure 3 but with another ring Figure 6 shows a cross-section of Figure 4 but with a ring of Figure 5 Figure 7 shows a cross-section of Figures 3 and 5 with a ring of Figures 5 and 6 but with a different spacer Figure 8 shows the section VIII-VIII of Figure 2; Figure 9 shows an enlarged section of the part indicated by F9 in Figure 2; Figures 10, 11 and 12 show the section of Figure 3, but with another embodiment of the invention and with three different sleeves.

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DETAILED DESCRIPTION OF THE INVENTION

Figure 1 shows a carabiner with two barrels one above the other 1 and 2, which are connected to each other by a central belt 3 and which are soldered into a ring (not shown) in Figure 1.

The strip 3 is brazed, for example gold, over its entire length of the barrel 1, almost to the mouth of the barrel 1, for example to a distance of about 8 millimeters before this mouth.

This strip is brazed only over a portion of the length of the lower barrel 2 and is not joined by brazing at a certain distance from the mouth of the lower barrel, creating a gap 4, for example, at one third of the barrel length as shown in Figure 2.

In particular, 1 and 2 are slightly convergent where they are interconnected by belt 3, and the cradle or region of contact of the belt 3 with the barrels 1 and 2 forms a small angle A, for example 0 ° 14 '.

At the front of the weapon, i.e. near the mouth of the barrels 1 and 2, they are mainly slightly deflected by a ring 5 slidable on the lower barrel 2 and rests on an arm 6 formed by enlarging the gap 4.

The outer and inner surfaces of the ring 5 are concentric and the inner diameter of the ring 5 corresponds to the outer diameter of the lower barrel 2. The outside of the ring 5 contacts the lower flat surface of the belt 3 at the enlarged gap 4, as shown in detail in Figure 4.

This ring 5 is part of a series of rings having a different outer diameter. Ring 5 is shown in Figures 1 to 4 and is the smallest ring in the series.

Figure 6 shows a cross-section of Figure 4, but the ring 5 has a larger outer diameter.

The ring 5 is located on the barrel 2 between the arm 6 and the sleeve 7.

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The sleeve 7, i.e. the cell surrounding at least partially the lower barrel 2, has a portion 8 longitudinally disposed on the belt 3 and is mounted thereon removably by a screw 9 on the belt 3.

In the described example, this part 8 is one of two vertical flanks 10 extending from the ring-shaped part 11 surrounding the barrel 2. These flanks 10 are connected to each other at the front of the weapon by a transverse sidewall 12 whose upper grooves are cut along a curve with radius greater than ,

The ring-shaped portion 11 is flattened between the flanks 10 and its thickness is such that it does not exceed the ring 5 by height and thus does not affect the deviation between the barrels 1 and 2.

The screw 9 is screwed into the strip 3 and passes freely through the opening 13, i.e. the longitudinal vertical opening, due to the height delimitation of the flank 10, which varies according to the ring 5.

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The screw 9 also extends through a spacer 14 interposed between the portion 8 and the sleeve 7 and the strip 3, the thickness of this spacer 14 predetermining the relative position of the main in the lateral position.

The screw 9 prevents the sleeve 7 from sliding off the lower barrel 2, but also prevents this barrel from rotating around the barrel 2, the part 8 being coherent with the belt 3 in the lateral direction.

The strut 14 is part of a series of struts of varying thickness.

In Figures 1 to 4 and 8 and 9, the spacer 14 is shown with an average thickness, and the axis of the higher barrel 1 is positioned in the same vertical view as the axis of the lower barrel 2.

In Figures 5 and 6, the spacer 14 is shown with a minimum thickness. For this reason, the axis of the lower barrel 2 is laterally offset by a distance D1 in comparison with a vertical view passing through the axis of the higher barrel 1.

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Figure 7 shows a cross-section of Figure 5 but with a spacer 14 that is thicker. The axis of the lower barrel 2 is laterally offset in the opposite direction to that indicated and by a distance D2 as compared to a vertical view passing through the axis of the higher barrel 1.

The sides 10 and the transverse wall 12 have a height such that they do not touch the higher barrel 1 and prevent lateral movement of the lower barrel 2 compared to the main 1.

The weapon geometry is adjusted as follows:

Before firing, one of the rings 5, most often the smallest, slides along the lower barrel 2 to the shoulder 6, deflecting the belt 3 and hence the higher barrel 1 from the lower barrel 2.

Shooting from both the main 1 and 2 at the target from a predetermined distance. The deviation between the impact of the first bullet and the second bullet is measured, and if not acceptable, the ring 5 is replaced by another, fired again, and the deviation of the wounds is measured. This is repeated until the ideal distance between the mouth of the barrel 1 and 2 is reached.

For lateral adjustment we use a sleeve 7 with insertion of spacers 14, most often the weakest. The screw 9 is screwed into the belt 3, thereby sliding the part 8 against the strut 14, and it slides against the belt 3.

Shoots from both main 1 and 2 and the deviation of the impact of the missiles is measured.

If the deviation is not negligible, the entire cycle mentioned above is repeated with a different spacer and all other steps until the deviation is negligible.

The carabiner user cannot damage the main 1 and 2 geometry alignment. When the sleeve 7, strut 14 and ring 5 are removed from the weapon, their reconnection automatically ensures perfect alignment. In fact, the height adjustment depends only on the outer diameter of the ring 5, when the lateral adjustment depends only on the thickness of the spacer.

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If for any reason someone wants another adjustment, it is sufficient to replace the ring 5 and / or spacer 14 with another.

Instead of using only one sleeve with a set of different spacers, a lateral adjustment can also be made using a set of different sleeves 7 without spacers 14.

Figures 10 to 12 show just this case.

These figures show a cross-section of a weapon with the same adjusting device as that described, but in any case using a different sleeve 7. In particular, the sleeve 7 provided with the flank 10 shifts the part 8 to a different distance from a vertical view passing through the bottom geometric axis. barrel 2, that is from the point of view of the location of the sleeve 7 on the lower barrel, the geometric axes of the barrel 2 and the sleeve 7 are identical.

In the accompanying examples illustrated in Figures 10 to 12, this is achieved by slipping or not slipping the washer into the groove 15 formed by the two flanks 10, this groove 15 having, for example, a thickness only slightly greater than the thickness of the strip 3.

However, it is not excluded that the strip 3 is inserted into the groove 15 without the possibility of mutual displacement. This variant also falls within the scope of the patent application.

It is clear that the location of this groove 15 determines the location of the part 8 moving towards the belt 3 and also the location of the barrel 2 relative to the barrel 1 in a lateral position.

The depicted sleeve 7 in Figure 10 comprises a groove 15 symmetrical with its vertically symmetrical view passing through the geometric axis of the lower barrel 2, after being placed on this barrel 2, unless the possibility of relative displacement is considered.

This last axis is thus placed in the same vertical view as the geometric axis of the higher barrel 1.

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In the sockets shown in Figures 11 and 12, the groove 15 is laterally offset in one or the other direction. With the nipple 7 shown in Figure 11, the geometric axis of the lower barrel 2 is offset laterally by a distance D3 from the geometric axis of the higher barrel 1 when the nipple 7 shown in Figure 12 creates the aforementioned offset in the opposite direction by a distance D4.

The adjustment of the geometry of the main 1 and 2 in this case is carried out according to the above-mentioned procedure with the difference that the lateral adjustment is performed instead of using the same sleeve and replacing the spacers through the sleeve 7 which is replaced by another set where Part 8 is elsewhere.

The ring 5 and the sleeve 7 do not necessarily have to be attached to the lower barrel 2. They can likewise be attached to the higher barrel 1 and the belt 3 is thus released from the barrel 1.

Likewise, it is not necessary that the barrels 1 and 2 are above each other. They can be side by side. In the latter case, the vertical direction must be replaced by the lateral direction and vice versa.

The invention is not limited to carabiners, but is applicable to other types of weapons with two or more barrels.

It is to be understood that the invention is not limited to the examples given, but is applicable to other weapons of arms, according to the method and apparatus set forth above within the scope of the invention as defined in the following claims.

Claims (13)

PATENT CLAIMS A firearm with at least two barrels joined to one another by a belt, except for a minimum distance at the barrel mouth, the parts in front of the barrels being convergent unless they are forced to deflect, characterized in that the belt (3) is attached to one of the barrels (1) practically to the mouth, but to the second barrel (2) is not attached to the mouth, while the second barrel (2) is placed at the front ring (5) separating the elastic deformation band (3), and the first barrel (2) and sleeve ( 7) is placed in a removable manner on the second barrel (2) on the front part of the weapon, part (8) of this sleeve (7) is located along the belt (3) and cooperates directly or by spacing with this belt (3). A weapon according to claim 1, characterized in that the cradles, i.e. the points of contact of the strip (3) with the barrels (1,2), form a sufficient angle so as to achieve a convergence of the barrel (1). , 2) to the mouth and thus avoid crossing the intervention. A weapon according to claim 1 or 2, characterized in that the outer surface of the ring (5) is concentric to its inner surface. Weapon according to any one of the preceding claims, characterized in that said part (8) of the sleeve (7) is attached to the belt (3). Gun according to claim 4, characterized in that the part (8) of the sleeve (7) is fixed to the belt (3) by means of a screw (9) screwed into the belt (3) through the opening (13) in said part, which is formed for the passage of the screw (9) and allows different distances between the barrels. Weapon according to any one of the preceding claims, characterized in that the sleeve (7) is provided with a part (11) which at least partially surrounds the barrel (2) and at least one flank (10) extending therefrom. and forms a part (8) along the length of the strip (3). Weapon according to claim 6, characterized in that the sleeve is formed by two flanks (10) forming a groove (15) therebetween, and into said groove (15). · 1 99,999 99 9 • 9 9 9 9 9 9 998 9 · · «• I» 9 ··· A belt (3) is disposed, wherein one of the sides (10) forms the aforementioned portion (8) which is in direct contact with the belt (3). Weapon according to any one of the preceding claims, characterized in that the ring (5) is located on the barrel (2) between the sleeve (7) and the arm (6) and is formed by a part of the belt (3). A method of adjusting the geometry of the front of a weapon with two barrels (1, 2) connected by a belt (3), which is formed in front of one of the barrel (1, 2), characterized in that: if the barrels (1,2) are arranged one above the other, laterally or side by side, a separate ring (5) of a series of several rings with outer different diameters, which have the function of height adjustment, gradually moves along the loose barrel (2) guns with two barrels (1, 2) up to a deviation that is acceptable, and the sleeve (7) is displaced along a portion (8) of the belt (3) at the front outer side of said barrel (2) interposed therebetween and strip successively struts (14) from a series of struts (14) of different thickness, for lateral adjustment if they are mainly (1, 2) above each other or in height if they are mainly next to each other, then fired from a gun with two barrels (1) , (2) up to an acceptable tolerance. 4 · ' 10. A method of adjusting the geometry of the front of a weapon with two barrels (1, 2) connected to one another by a belt (3) formed at the front of the weapon on one of the barrel (2), characterized in that: one of the rings (5) of a series of multiple rings of different outer diameter is moved along the belt-provided barrel (2) so that the height variation if the barrels (1, 2) are one above the other or laterally if these barrels (1,2) are adjacent each other so that when shooting from both mains the deviation is acceptable, and in front of the barrel (2) is moved the nozzle (7), which is from a series of different nozzles to allow the deviation, in the lateral direction if they are above each other or 1, 2) side by side, when shooting from both mains, the deviation was acceptable, these different sleeves (7) having their part (8) formed at different distances compared to their geometric axes. Method according to claim 9 or 10, characterized in that the part (8) of the sleeve (7) is attached in a removable manner to the belt (3) either directly or by means of a spacer (14). A device for adjusting the geometry of the front of a weapon with two barrels (1,2) connected to one another by a belt (3) formed at the front of the weapon on one of the barrel (2), characterized in that it has a series of rings (5) with a different outer diameter and a sleeve (7) adapted to the barrel (2) with a series of spacers (14) for insertion between the strip (3) and the part (8) of the sleeve (7). A device for adjusting the geometry of the front of a weapon with two barrels (1, 2) connected to one another by a belt (3) formed at the front of the weapon from one of the barrel (2), characterized in that it has a series of rings ( 5) with different outside diameters and a series of sleeves (7), the parts of which are formed at different distances from their geometric axes.