DE145971C - - Google Patents

Description

de * \ £ 3 W t-iTtZT'i't'CT'l · 'ö C'Z · C / tX ·

IMPERIAL

PATENT OFFICE.

As is known, forms in recoil loading weapons, especially those with movable ones Run, pulling out the sleeve is an essential moment, which most often gives rise to malfunctions, insofar as, when a relatively large development of force must take place at the moment of pulling out, to loosen the sleeve, which is firmly seated in its bearing. If a shell is fired

ίο their dimensional dimensions by chance go to the extreme tolerance limit, so it often happens that this is then particularly the case that is firmly seated in the chamber is not pulled out; the chamber flies empty back without pulling out the case and pushes a new one as it moves forward Cartridge against the chamber, so that a jam occurs, which occurs with recoilers Is more difficult to fix than with ordinary firearms, because there the breech block is under permanent spring pressure and is therefore more difficult to handle than the one for manual operation from the outset equipped single loader lock.

The invention now relates to a breechblock assembly for recoil chargers with movable Barrel in which a safe and quick extraction of the fired case it is ensured that the sleeve is inevitably loosened before it is pulled out is effected. For this purpose, the arrangement is made so that the lock between barrel and breech causing organ, z. B. the so-called. Bolt head, which is known to be the extractor carries such a special when unlocking under the action of the recoil Relative adjustment with respect to the other closure parts undergoes through which the case is momentarily loosened with a jerk, whereupon it is fully pulled out, be it as with recoil loaders with a short return movement, through the locking piece, which continues to recede after its separation from the barrel, be it, as in Recoil loaders with a long reverse motion, held by the end of their breech block Chamber in the previous run.

The drawing shows an example of an embodiment of the invention on a recoil loader, System Mauser, illustrated, showing: Figure 1 the locking parts in the longitudinal view, partly in section, in the position with the lock unlocked and loosened sleeve. Fig. 2 shows the closure piece alone in longitudinal section, in the same position of the parts as in Fig. 1. Fig. 3 illustrates the closure piece in the Longitudinal view, with the bolt head in the locked position. Fig. 4 is a longitudinal section to FIG. 3.

As for the overall arrangement of the weapon on which the invention is illustrated is, this is what it is

Claims (3)

a recoil loader with a long return movement, in which, after the firing, the barrel L and the breech block K jointly perform the return movement in the coupled state. In the last phase of this backward movement, the unlocking between barrel and breech chamber is initiated by, before barrel and chamber have reached their outermost position, the rotary sleeve A forming the lock with its rear protruding end against the rear end closing the lock housing P hits; once the chamber has reached the end of its path of movement in the lock housing, the lock chamber has also been unlocked from the barrel. The barrel then moves forward again under the influence of its return spring, while the locking chamber is held in its rearmost position until the barrel has reached its front position, the release of the chamber taking place, which then jumps forward into the closed position. As soon as the chamber has now reached its foremost position, the locking takes place in a non-positive manner under the action of a special spring tensioned during unlocking. The locking and unlocking between the barrel and the breech block takes place by means of the bolt head R, which in turn is rotated by the rotating sleeve A, which is displaceable in the chamber and which engages in corresponding grooves r1 of the bolt head with helically wound lugs a '. The rotary sleeve, for its part, receives its relative, locking effecting displacement backwards by a special spring T located in the chamber housing, while the unlocking effecting displacement forwards takes place in that, as mentioned, the part A1 protruding backwards beyond the end of the chamber in the locked state When the moving system (chamber and barrel) retreats, the sleeve A hits the butt plate P, and is thereby pushed inwards, the sleeve turning the bolt head R with the lugs r into the unlocked position by means of its screw strips al. According to the invention, the locking head R is screwed into the chamber housing with a special, relatively flat thread; on the other hand, the thread pitch of the screw strips a1 of the rotary sleeve is very steep, and this results in the following work process through the interaction of these two threads: When the rotary sleeve is pressed inwards (by striking the bottom plate, whereby, as explained earlier, the bolt head with its lugs into the Unlocking position is rotated), it is not only rotated, but also screwed back a little, so that by means of its extractor, when screwing back in the chamber housing, it simultaneously pulls out the cartridge case somewhat, i.e. loosens it. This inevitable loosening takes place at the same time as the unlocking in the last phase of the retreat from the barrel and breech under the effect of the recoil; the recoil itself is used to loosen the case so that the barrel, after the backward movement is complete and the chamber is held, can proceed without any particular force being absorbed by the separation of the cartridge case from the barrel. The barrel with its cartridge chamber slides down from the case, which has already been loosened, without great friction or force. The forward movement of the barrel is therefore not impaired in any way by pulling out the case, which is extremely important for the prompt function of the weapon. In the manufacture of the lock respectively. with the outward movement of the rotary sleeve, the head is again by the amount by which it. was screwed back when unlocking, screwed forward. In Fig. 3 and 4, this latter position (locking position) can be seen; 1 and 2 show the chamber with the bolt head screwed back in the unlocked position. Patent-A ν Proverbs: 1. Closure for recoil loader with movable barrel, characterized in that the locking between barrel and breech causing the extractor organ (z. B. breech head R) such a special relative adjustment during unlocking under the action of the recoil with reference to the other closure parts learns that the sleeve is momentarily loosened jerkily before the actual pull-out takes place. 2. Closure according to claim 1, characterized in that the rotation of the closure head (for the purpose of unlocking and locking) and the relative adjustment of the same in the breech block thereby achieved is that the bolt head can be screwed in and unscrewed in the breech block, as a result a retraction at the unlocking rotation by screwing in the locking rotation by screwing outwards a corresponding forward movement takes place. 3. Closure according to claim 1 and 2, characterized in that the inward screwing of the closure head (for unlocking and loosening the sleeves) and the outward screwing of the same (for locking and pressing against the sleeve base) by a horizontally displaceable in the closure piece, with steep threaded strips ( a \) in corresponding grooves (r ^l ) of the bolt head (R) engaging rotary sleeve (A) is effected. 1 sheet of drawings.