DE1021759B - Cartridge for in particular automatic firearms - Google Patents

Description

GERMAN

The invention relates to a cartridge for firearms, in particular automatic ones, the case thereof has at least two contact surfaces staggered in the axial direction, which when loading with two in axial direction staggered stops come into contact in the cartridge chamber.

The two staggered stops at the end of the cartridge insert come into the barrel at the same time against the corresponding attacks on the way to the system. The cartridges are preserved when inserted a violent thrust in the barrel, especially with the row fire, through which the bullet penetrates into the The neck of the cartridge case can loosen or even come loose, causing irregular shooting or under certain circumstances even spontaneous ignition can occur.

In order to avoid these excessively strong impacts, it is proposed according to the invention that the shape and the mutual position of the contact surfaces on the case and the stops in the cartridge chamber are such that that the cartridge at the end of its introduction into the cartridge chamber initially by deformation of the braked a contact surface and then by contacting the second contact surface in its correct position is set. The braking surface of the cartridge case of the ammunition should advantageously be in front of the adjustment surface the sleeve. The adjustment surface can in a known manner by a bead at the rear end the cartridge case be formed, the diameter of which is greater than the diameter of the jacket of the case is. In this known ammunition and the associated weapon, however, the staggered attacks the cartridge case the. staggered stops in the chamber of the weapon adapted so that the shocks occur, which are avoided by the invention.

It is also known to push cartridges into the cargo space of the gun barrel at such speed to introduce that the sleeve length when the sleeve edge suddenly hits its bearing as a result the inertia of the projectile mass is increased in order to achieve that the projectile is properly attached the pipe pulls. This requires a very firm connection of the projectile with the case, since otherwise pulls the projectile out of the case, resulting in a regular sequence of shots should be avoided at all costs. A deliberate braking of the cartridges to be inserted according to the invention cannot be achieved through this well-known training.

Finally, it is known to provide the cartridge chamber with a tapering in the case of guns which are loaded with cartridges separated from the projectile, the diameter of which is smaller than the peripheral parts of the cartridge that come into contact here, so that the cartridge to be inserted is attached to this cartridge for in particular
automatic firearms

Applicant:

Brevets Aero-Mecaniques SA _r
Geneva (Switzerland)

Representative: Dr. H. Wilcken, patent attorney,
Lübeck, Breite Str. 52-54

Claimed priority:
Luxembourg of February 16, 1954

Taper presses tightly and tightly against the taper. In contrast, it is the case with the invention in order to introduce cartridges as a whole into the cartridge chamber of an automatic firearm which the inventive training a Abbremsumg experienced without the projectile loosening or loosening in the neck of the cartridge case, which is a irregular firing or even spontaneous ignition due to those that otherwise occur when inserting the cartridge strong impacts are avoided.

The invention is illustrated in the drawing, for example.

Fig. 1 shows in longitudinal section the cartridge chamber of an automatic weapon with a cartridge which is just being introduced;

2 and 3 show two schematic longitudinal partial sections on a larger scale, two characteristic stages in the insertion of the cartridge into the Cartridge chamber.

The weapon can be designed in any way.

As is known, the ammunition of an automatic weapon consists of a cartridge, which is essentially formed by a generally metallic, at the bottom containing a primer and the propellant charge 3 enclosing sleeve 2 and a projectile 4, which z. B. is fastened tightly by pressing in the neck c of the sleeve.

Regardless of the ignition system (mechanical or electrical ignition) can be a satisfactory one The weapon can only work if the cartridges all have the same position in the cartridge chamber take in.

709 846/87

It has already been proposed that this task of defining the position of the cartridge should be performed solve that one provides the sleeve 1 with a bottom bead, which solely by resting against the forehead the barrel of the weapon causes the braking and the determination of the position of the inserted cartridge.

However, such a solution has the disadvantage that the cartridge is subjected to a violent shock

schlul.i from a larger return, at the end of which he compresses a buffer and accelerator spring, the effect of which is added to that of the return spring in order to scbleu the lock forwards again the one whose speed at the end of the forward stroke is greater than the speed which he had the first shot in the same phase of the working game. Therefore, during the row fire the adjustment surface becomes with each shot after the pre-shot, which reduces the risk of loosening the contour of the braking surface.

Loss brings with it, what the following disadvantages to The braking surface is then conveniently in front of the

Can have consequence: adjustment surface and is through the shoulder c of the sleeve 2

In the case of partial loosening, the volume is formed, while the adjustment surface is changed by one in which the propellant charge burns, so that bead b is formed, which becomes irregular at the rear end of the shooting; when the case is complete 15 2. eg immediately in front of the pull-out groove, the propellant charge can be loosened with the hot barrel and has a diameter. which is larger than the one in contact, which is a self-ignition diameter of the shell of the sleeve. evocation to can. So that the shoulder of the sleeve 2 through its

To prevent these disadvantages, the fitting has a braking effect; it is advisable that the trone at the end of their way into the cartridge chamber 20 in the cartridge chamber 1 lying stop one of decelerated so that it has a gently deviating shape in its final place of the shape of this shoulder, lung comes. - so that the shoulder is not accurate and without deformation

So one has a braking of the cartridge by fitting into the bore delimited by the stop, shaping the shoulder ”? of the cartridge 2, but that at the beginning of the braking phase a partial, whereby this deformation is achieved by the impact of the gradual deformation a smooth, gradual shoulder e on a stop in the barrel of the weapon slowing down the cartridge during its insertion. tion in the cartridge chamber causes.

This solution does not always allow an exact

Determination of the position of the cartridge, in particular. has a truncated shape and the corresponding when the Einführgeschwindiigkeit the cartridge reaches high 30 stop through a shoulder C _{1 of} the cartridge chamber values, as is formed in an automatic weapon, these two shoulders are obtained at a high rate of fire. different opening angles.

In this case, namely, the production. One then preferably gives the shoulder c the

tolerances of the sleeve, minor differences in hardness sleeve 2 an opening angle, ζ. Β. of 45 °, which of the metal of the individual sleeves, inequalities of 35 are much larger than the opening angle, ζ. Β. of the rate of fire at the row fire and at the 30 ". of the shoulder C _{x of} the cartridge chamber 1

ter e against the correct setting of the cartridge in the cartridge stroke rigidly connected to the barrel influence, an irregularity of the position chamber 1 in the first shot only by the required trailing edge of the finally inserted cartridge 40 mung the shoulder e of the case 2 by stop and in axial direction. Rolling effect on the shoulder e _{t of} the cartridge chamber,

The aim of the invention is to eliminate the bead b only at its stop to the disadvantages, ie a precise setting of the position, in the following shots l> ei row position of the bottom of the inserted cartridge without fire initially due to the above deformation and Risk of loosening of the projectile so that the weapon 45 rolling action and then by a more or properly works. less forceful hitting of the bead b.

According to Fig. 1, the cartridge case and In Figs. 2 and 3, the most characteristic positions are

the chamber designed so that the shape and
mutual position of the contact surfaces on the sleeve and
the stops in the cartridge chamber are so that the 50 After the shoulder of the case 1 with the school cartridge at the end of its insertion path into the ter e _{x of} the cartridge chamber (Fig. 1) in contact ge-cartridge chamber 1 initially by deformation of the
braked a contact surface and then by contacting the second contact surface in its exact position
is set.

It is possible to design the braking surface and the corresponding stop so that when you open

lungs of the deformation phase of the shoulder sleeve 2 shown.

when it comes, it is gradually deformed until it hugs the shoulder C ₁ exactly, where this deformation, which produces gradual braking, takes place on a path which, in the case of a 20 mm gun, is about 2 mm (Fig. 2) > Can bear, whereupon the cartridge covers an additional path α (which is 1.2 mm in the example), while the braking effect continues because the school

hit the setting surface the speed of the
Cartridge has become so small that the impact of the adjustment surface against its stop is weak and is pushed back by the same distance (1.2 mm) in 60th c , this additional way bringing the bottom bead b to its stop

In no case, there is a risk of the projectile loosening brings with it.

So you can set it up so that the braking surface only a correct setting of the cartridge with the first shot, when the breech of its rear position, in which he is retained by the trigger system, under the sole effect the recoil spring runs forward. With this type of weapon, the 70

(Fig. 2). The cartridge is then completely closed.

Claims (6)

Patent claims: 1. Cartridge for automatic firearms, in particular, whose case has at least two in the axial direction Direction has staggered contact surfaces, which when loading with two in the axial direction staggered stops in the cartridge chamber come into contact with the weapon, characterized in that the shape and mutual position of the contact surfaces on the case (2) and the stops in the cartridge chamber (Ij are such that the cartridge at the end of its introduction is initially through deformation of one contact surface (e) braked and then set in their correct position by applying a second contact surface. 2. Cartridge according to claim 1, characterized in that the braking surface {e) of the sleeve (2) of the cartridge is in front of the adjustment surface of the sleeve. 3. Cartridge according to claim 2, characterized in that the braking surface (2j by the shoulder (e) of the sleeve is formed, while its adjustment surface is formed in a known manner by a bead (b) at the rear end of the sleeve, the diameter of which is greater than is the diameter of the shell of the sleeve (2). 4. Cartridge according to claim 3, characterized in that the bead (b) is located immediately in front of the pull-out groove in the bottom of the sleeve (2). 5. Cartridge according to claim 3 or 4, characterized in that the shoulder (e) of the sleeve (2) has an opening angle which _{is different from that of the shoulder (^ 1} ) of the cartridge chamber of the weapon. 6. Cartridge according to claim 5, characterized in that the opening angle (z. B. 45 °) of the shoulder (s) of the sleeve (2) is greater than the opening angle (z. B. of 30 °) of the shoulder O ₁ ) of the Cartridge chamber (1) of the weapon is. Considered publications:
German patent specifications No. 72 590, 456 220,
348. 1 sheet of drawings