DE1453914A1 - Tube for firing practice ammunition from automatic weapons - Google Patents

Description

14539H

ExpL

DYNAMIT NOBEL AKTIENGESELLSCHAFT Troisdorf, District Cologne

Tube for firing training ammunition from automatic weapons

When firing practice ammunition, for example those known as plastic training cartridges Target practice cartridges from automatic firearms with locking breeches have shown that in comparison With the appropriate sharp cartridges lower gas pressure is not sufficient to keep the recoiling parts of the weapon in the required Way to move. However, the automatic puncture of the weapon does not correspond to the advance of practice ammunition guaranteed.

It is known that this deficiency can be remedied by arranging recoil-enhancing jets in front of the barrel mouth. If these nozzles can be attached at all, they must be made relatively large. The consequence of this is that the weight of the weapon increases significantly, which in many cases, however, cannot be accepted. In addition, when the weapons are installed in tanks, the required space may not be available.

It is also known to use non-locking closures, so-called mass closures . However, these do not lead to the desired success with many weapons, as they cannot always be implemented in the required manner for structural reasons.

For firing blank cartridges, use has already been made of keeping the barrel at a certain distance

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"■ to be divided into two parts before the chamber. The division is made to match the gas pressure, which is also lower than that of live cartridges, so that the masses to be moved, ie the rear tube part including any locking devices, are matched to a weight, that ensures the automatic puncture of the weapon.

For practice ammunition where a projectile in the barrel is a perfect one Must receive guidance, such a subdivided pipe is not suitable because when the two pipe parts diverge on the one hand, a gap forms through which the projectile must pass, and on the other hand, the trains and pads of the tube against each other offset.

To remedy this disadvantage, the invention proposes for the shooting of such training ammunition from automatic weapons, the barrel at the front end of the chamber, at least close to "flush with the case mouth of a training cartridge inserted in the camp, in two in the rest position with their adjacent end faces to subdivide an annular gap which is connected to the pipe bore and extends over at least a part of the cross-section of the pipe and is axially displaceably guided to a limited extent relative to one another and is axially displaceable against a constantly effective force, preferably spring force.

With such a design of the pipe is achieved in that the standing at the front end of the cartridge chamber still under relatively high pressure combustion gases from entering a short way in the existing between the pipe parts annulus and move through their pressure on the end face of the rear tubular part of this backward. By appropriately dimensioning the radial expansion of the Ringapaltee you have it in hand to adjust the size of the end face so that a sufficient return of the rear pipe part is achieved, which ensures the automatic function of the closure parts. Furthermore, with the design of the tube according to the invention

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reaches that the projectile when loading the cartridge in the transition of the tube comes to rest, so that as soon as it starts moving after the shot has been fired, it is immediately flawless and has no interrupted guidance at any point on the further way, whereby a good shot precision is ensured.

The invention is shown in the drawing in an exemplary embodiment and will be explained below with reference to this. It: demonstrate

Pig. 1 in an axial section the pipe parts before the shot and

Pig. 2 the pipe parts shortly after the shot was fired.

The relatively short rear pipe socket 2 is in the corresponding recess by means of its pin-shaped extension 6 of the front tubular part 1 and forms with this the annular gap 4 * The floor 5 of the dash-dotted lines Exercise cartridge is already in the rear end of the tubular part 1 or in the transition from the cartridge chamber to the, not shown also not shown trains and fields of the pipe. With 3 closure or locking parts of the weapon are schematic indicated.

According to Fig. 2, the developing when the shot is fired Combustion gases by their pressure on the annular front face of the pipe part 2 against the constantly effective Force of a closing or recoil spring or the like, not shown shifted backwards, while the projectile, as indicated, simultaneously moved forward through the pipe.

Other implementation options are conceivable. Instead of leading the two pipe parts 1 and 2 into one another like a sleeve as shown, the annular gap 4 could, if necessary, also extend over the entire pipe cross-section and the two pipe parts 1 and 2 could be in a special, preferably on the front pipe part, covering the annular gap outwardly 1 attached sleeve. _O ' _nΩo ~ _{.. Λ} _ __

yuyoo4 / 0007

Claims (1)

H539H Claim Tube for firing practice ammunition from automatic weapons, characterized in that it is at the front end of the chamber, at least almost flush with the case mouth of a training cartridge inserted into the camp, in two in the rest position with their adjacent end faces one in connection with the tube bore standing annular gap (4) extending over at least a part of the pipe cross-section and forming parts (1 and Z) that are axially displaceably limited relative to one another and counter to a constantly effective force, preferably spring force, is subdivided. Troisdorf, November 25, 1965 Kg / hub. 909834/0007