DE1578427A1 - Automatic firearm - Google Patents

Description

26 "9ol966

fo-sto-12

Eugene Morrison St oner, Route 1, Box 7o, Port Clinton., Ohio / USA

Automatic firearm

The invention relates to automatic firearms, in particular automatic rapid fire guns with short rewind.

In particular when used in military operations, an automatic rapid-fire weapon must not only be faultless shoot, but can also be maintained and repaired in the field with a minimum of tools. For this Basically, the weapon should have a simple construction and consist of as few parts as is compatible with a high performance of the weapon.

Furthermore, firearms intended for installation on military vehicles, armored vehicles, for example, are intended to be more compact and lighter than fixed firearms. the The size of that part of the firearm that extends rearward from the ammunition guide or magazine is particular critical because the rear end of the firearm, usually including the ammunition guide, engages in the dome of the

QQ98 32 / Q2 48 ~ ² "

Armor extends. Since the firearm has to be set up on the The target is moved, the space required inside the vehicle for the firearm takes up the size of the rear Ammunition guide located part quickly.

The firearm according to the invention can be easily and quickly expanded in the field by a man, without the need for tools are. Many of the parts of the firearm serve multiple functions, thereby reducing the weight and size of the firearm and their construction and maintenance can be simplified, and reliability is increased. The parts are like that arranged that in particular the size of that part of the firearm that must be contained in a vehicle is reduced.

The firearm according to the invention generally operates with a barrel return. The barrel of the firearm reciprocates axially in a housing prior to the point at which the ammunition is inserted into the housing. A closure is moved axially past the feed point with the aid of a closure carrier. The bolt carrier has a relatively short upper part and a lower part which is longer than the stroke of the bolt carrier. A supply device for the munition is provided with a cam stop that cooperates with a cam, which extends over the entire length of, the lower part of the bolt carrier. In this way, ammunition is fed to the feed point.

009833/0248

1578-27

Between the tube and the housing, a recuperator is switched on, which is arranged below the pipe and before the Verschlußträger.ange- · ¹ and serves to cushion the recoil and Vorholkräfte. The retractor is also caused by the return of the tube to engage the front end of the lower part of the bolt carrier, so that the movement of the bolt carrier relative to the tube is accelerated during the return movement. At the rear end of the housing a buffer arrangement is provided which engages the rear end of the upper part of the bolt carrier and thereby cushions the recoil force acting on the bolt and the bolt carrier.

In one embodiment of the invention is at the rear At the end of the housing a sear is provided, which is optional can engage in a trigger notch in the lower part of the bolt carrier to the forward stroke of the bolt carrier interrupt. This sear is cushioned by the buffer arrangement, which is also used to cushion the recoil force of the Lock and the lock carrier is used.

The invention also includes several novel sub-combinations, which are particularly useful in the context of the firearm described above, but also to other automatic ones with advantage Automatic weapons can be used. For example According to one feature of the invention, the fetcher has one Druckraittelylinder, which is attached to the housing and arranged below the tube and with the lower part of the Lock carrier is aligned. The inner walls of the cylinder

0098 3 3/02 4 8 '- 4 -

^BATH ORIGINAL

in the swgefas &all; grofisnp .iforclo ^ ea part _ff in öem Bidh © isa ¥ © ^ fe © lkolb © a Ms- Bid li © rfa®x-jegfc _ft naä a diameter lslein © r © n, posterior, part _? ± n which you can see an acceleration piston moving back and forth. The advance piston is attached to the barrel. The acceleration piston engages the front end of the lower part of the breechblock carrier and accelerates it when it travels backwards in relation to the tube.

The acceleration indicator comes to a stop on the cylinder, when the pipe has completed an initial phase of its return movement. As a result of an upper flow throttle opening, the advance piston can continue its backward movement for a short distance, ' whereby the recoil force of the tube is cushioned.

The invention also provides a switchable Munitionszuführungselnrichtung _f are particularly advantageously used in the above-described fire weapon, but also to other firearms can be applied _o the known automatic firearms ,, which have been used for military purposes, are diverse from eiaem single Munitions stock charged "For However, many different types of ammunition are required, such as spr, narrow ammunition for personal targets and armor-piercing ammunition for tanks. As a result, the known firearms encountered difficulties. Often one and the same type of ammunition was fired with the known firearms _B which represents a compromise between the desired types © or was only effective against targets of a certain type. In another case, different types of ammunition were used on one

33/0248 BADORiGlNAL

single strap united so that all types of ammunition on all Targets were fired. Of course, none of these measures were satisfactory.

As a result of the switchable ammunition feed according to the invention, the correct type of ammunition can be selected quickly for each target. The firearm is therefore more adaptable and there is no need for inefficient firing of unsuitable cartridges. According to this feature of the invention, the device is connected for supplying the ammunition with different ammunition supplies and is a changeover _r provided which serves to select the ammunition from the ammunition is fed to the housing.

In one embodiment, the lock carrier, which moved in the housing in the longitudinal direction past the feed point, a relatively short, upper part and a relatively long lower part, which is longer than the stroke of the bolt carrier . An elongated link is formed in each of the two opposite sides of the lower part of the lock carrier. The device for feeding ammunition has two sliding blocks, each of which interacts with a gate and actuates a feed pawl. Each of these pawls does the supply of ammunition from another supply. The switching device is used to select the ammunition supply.

The types of ammunition in the various supplies often have different ballistic properties. After a

0 09833/0248

Another feature of the invention, this is taken into account, that the sighting device is automatically adjusted according to the selected ammunition supply.

These and other objects and features of the invention emerge the following description of exemplary embodiments of the Invention based on the drawings. In these shows

Fig. 1 diagrammatically shows a preferred embodiment of a cannon according to the invention and

Fig. 2 on a larger scale a section along the line 2-2 of Fig. 1,

FIGS. 3a and 3b show a vertical longitudinal section on a larger scale Parts of the downhaul shown in FIG.

Fig. 4 shows a section along the line 4-4 of Fig. 3a,

Fig. 5 is a perspective view of part of the dismantled from the cannon Vorholers and

Fig. 6 is a section along the line 6-6 of Fig. 2,

7-3 show on a larger scale in vertical longitudinal section the central part of the cannon shown in FIG. 1 in successive forms Phases of the shooting process.

Fig. 10 shows on a larger scale a section according to Line 10-10 of Fig. 2,

_ 7 009833/02 48

■ ä »7

1 is fSöB © £ © s KaSstab f ₃ S 12ΪΜ2 ^:

aas Sctoitt E. aefe. äes Sdais

.Fig. 12 ia größere® scale a section do ä <ss corn 12 _"12. of Fig. 2., -

Figures "13-16 show on a larger scale in vertical longitudinal section the rear part of the cannon shown in Fig. 1 in successive Phases of the shooting process.

Fig. 17 shows, on a larger scale, a rear view of the cannon of Fig. 1 with parts cut away;

18 is a section taken generally along line 18-18 of FIG. and

19 shows a perspective view of the rear buffer and draw-off tunnel arrangement after removal from the cannon.

20 and 21 show on a larger scale in horizontal section, seen from above, the central part of the cannon according to FIG. 1 with the device for supplying the ammunition in successive phases of the shooting process.

Fig. 22 shows a section along line 22-22 of Pig »20,

FIG. 23 shows a similar section to FIG. 23, but with the Bolt and bolt carrier in the front position,

24 shows a perspective view of part of an ammunition belt which has been removed from the cannon,

009833/02

BATH ORIGINAL

Fig. 25 is a perspective view of a part of the device for feeding " the ammunition, with parts cut away,

26 is a perspective view of part of the removed from the cannon, Device for feeding the ammunition,

27 is a diagrammatic vertical longitudinal section of the central part of the cannon during the advance phase,

28 in a horizontal section similar to FIGS. 21 and 22, seen from above, the switching device for the ammunition feed in an intermediate position,

29 shows another embodiment in a vertical longitudinal section of the voyager and

30 is a diagram of a circuit for setting a fully automatic or semi-automatic shooting process depending on the position of the switching device for the ammunition supply .

1, 2 and 6 show a machine gun with a barrel 5, a housing 6 and a device 7 for feeding Ammunition. The cannon is z. B. mounted on a vehicle, such as a tank for military use. An embodiment A holder for the cannon comprises a ring 11 with inner rails 12 which fit into corresponding outer grooves 13 engage on the side of the housing. A releasably arranged pin 14 passes through openings which are aligned with one another 15, 16 in the ring and the housing 6 and fixed the cannon in

0 09833/024 8

1579427

the longitudinal direction opposite the ring. The support ring 11 is carried by a horizontal pivot pin 18 which is mounted in a yoke 17. A vertical pin 19 extends from the web of the yoke, with which the yoke is mounted pivotably about a vertical axis in a vehicle (not shown). The gun is thus prevented positively against a displacement relative to the vehicle but _r sjuia setting pivotable.

The tube is in the front portion of the elongated, generally cylindrical portion 25 of the housing along the axis 26 of the Tubular core mounted so that it can move back and forth. For introducing Cartridges 27 in the chamber / as well as firing the Cartridges and to eject the empty cartridge cases A locking device is provided. This has a locking device 28, which is aligned with the tube axis, and a locking device carrier 29, which carries the closure and is reciprocable in the longitudinal direction of the housing. The bolt carrier moves past a point 3o that is arranged behind the barrel, and on which the ammunition is fed. The lock carrier 29 has a relative short, sleeve-shaped upper part 31, which is the closure carries, and a relatively long, lower or main part 32, in a generally rectangular lower part 33 of the Housing is housed.

Between the tube and the front end of the lower housing part 33, a Vorholer 36 is switched on, which under the

00983370248

Tube is arranged and to cushion the recoil and Forcing forces serves. The fetcher is aligned with the lower part 32 of the bolt carrier and engages the front thereof End to accelerate the breechblock carrier 29 as it moves back against the tube.

The recoil force of the breech 28 and its carrier 29 is cushioned by a buffer assembly 38 on the rear Is arranged at the end of the housing and towards the end of the recoil barrel engages at the rear end of the sleeve 31 of the lock carrier. With the buffer arrangement 38 is a sear 41 pivotally connected, which engages in a pull-off notch 42 in the lower part 32 of the bolt carrier to the retraction movement to interrupt the bolt and bolt carrier and to keep them in the rear, cocked position. By When the trigger 4o is pressed, the sear 41 is lifted out of the notch 42, thereby initiating the shooting process.

A muzzle brake 43 is attached to the front end of the barrel connected, through the openings of which gas escape to the rear can.

2 and 6-9 is on the rear end of the A pipe extension 48 is screwed on the main part of the pipe. The outer surface of the tubular extension forms a bearing surface, with an internally arranged bearing surface 49 in the upper region of the front part 25 of the housing in sliding contact

009833/0248

1576427

stands. A collar 5o surrounding it is attached to the tube, which also has a bearing surface 51 on the outside, which with a corresponding inner Lager.flache 52 in the front end part of the front area of the upper housing part 25 in Slidable contact is so that the pipe is supported. At the front The end of the pipe collar 5o has a shoulder 53 which is attached to a arranged between the ends of the tube shoulder 54 rests. A nut 55 is screwed onto the tube in front of the collar, which defines the waistband in the longitudinal direction. A locking ring 57 is inserted between the nut 55 and the collar 5o, which has tabs 56 which are in opposite directions Directions are turned and in pegs of the federal government and the Mother intervene. In this way, inadvertent loosening of the nut 55 is prevented. A twist of the covenant opposite the pipe is 6o des by an inner wedge Federal prevented. This wedge engages in a corresponding keyway 61 of the barrel. The covenant is with a downward facing Tab 62 provided which penetrates a guide slot 63 open to the front of the housing and on the sides engages the guide slot. This fixes the collar 5o and the tube against rotation relative to the housing, while they are axially reciprocable.

According to FIGS. 2, 3a and 3b, the hauler 36 has a Vorholzylinder 7o, the front end of which penetrates a downwardly directed lobe 71 of the housing 6. That rear end 72 of the cylinder is in the front area

'- 12 -

- 0098 33/02 i 8

of the lower housing part 33 is screwed in. The cylinder therefore extends parallel to below the pipe axis 26 you and is aligned with the lower part 32 of the lock carrier. In the pre-wood cylinder 7o a pre-recovery piston 73 is arranged, which has a piston head 75 and a piston rod 74 which extends away from the piston head through a recess 76 in the downward part of the tab 62 of the pipe collar extends. On the piston rod 74 is an internally threaded sleeve 77 screwed, which has an outer flange 78 which engages the tab 62 of the pipe collar and thereby the Holding the rag on the piston rod. Unintentional loosening of the threaded sleeve 77 is caused by a spring-loaded Prevents locking pin 79, which engages in one of the notches 8o arranged in a circle, which in the flange 78 of the Internally threaded sleeve are formed. An adjusting nut 83 is arranged on the piston rod behind the tab 62 of the collar, which precisely determines the position of the pipe in relation to the housing and the fetcher in the longitudinal direction. In a tapered, arcuate slot 86 of the adjusting nut is wedged in an arcuate piece 85 of resilient material, which holds the nut in the selected position on the thread 87 of the piston rod.

The internally threaded sleeve has a knurled outer surface so it can be easily removed by hand. After the acceptance of the Internally threaded sleeve 77, the tube can easily be pulled out of the front end of the housing.

00983 3/02 U 8

■■ '■ .: - π -

Since the advance piston rod 74 through the internally threaded sleeve 77 and the adjusting nut 83 is attached to the tube 5, the piston head 75 moves with the return and advance Pipe backwards and forwards.

The advance piston moves in a relative diameter large, front bore 91 of the Vorholzylinders 7 ο back and forth. In one formed in the cylinder, smaller in diameter An acceleration piston 93 moves in the rear bore 92 back and forth. The acceleration piston 93 has a piston head 95 with a seal in the form of an O-ring 96. Between the advance piston head 75 and the acceleration piston head, the interior 94 of the advance cylinder is filled with a liquid filled, so that when the return piston moves backwards, the smaller diameter acceleration piston 93 is moved backwards at a higher speed.

The acceleration piston 93 is hollow. It has a closed extension lol, which protrudes from the piston head 95 to the front, and an open extension 107, which protrudes from the piston head 95 to the rear. During the return movement, the rear extension 107 of the acceleration piston engages the aligned front end 97 of the lower part 32 of the lock carrier and thereby pushes the lock carrier 29 backwards out of the closed position shown in FIG. The backward movement of the accelerator piston is limited by an inner shoulder 108 at the rear end of the fore cylinder. ■■■ '■. ■■■'' ^: -14 -

0 0 9833 /0.2 48

Inside the Vorholzylinders a strong Vorholg-f is created between a shoulder 99 of the cylinder wall and the Vorhol piston head _; > Spring 98 compressed, which pushes the advance piston 73 forward->. The accelerator piston 93 is lighter. Return spring 100 pushed forward, which is arranged in the hollow acceleration piston and its closed, front extension 101. This extension is surrounded by the return spring 98. The return spring 100 is compressed between the closed, front end of the acceleration piston and a plug 102. This is displaceably mounted in the rear extension 107 of the acceleration piston and rests on a stop pin 103 which is attached to the pre-wood cylinder 70 and penetrates an elongated slot 104 in the rear extension of the acceleration piston. In its foremost position, the acceleration piston head 95 rests on a ring 105 which is connected between the shoulder 99 and the return spring 98. Since the return spring is considerably stronger than the return spring for the acceleration piston, the forward movement of the acceleration piston is limited in this way.

In the wall of the larger diameter part of the forewood cylinder a tapered, in particular wedge-shaped throttle groove 110 is formed according to FIGS. 3a and 4. This groove 110 allows the liquid to pass the prefetch plunger head in a programmed amount after it is removed Moved backwards a certain distance when reversing

- 15 00 983 3/02 48

has · Between the front end of the recoil spring and the recoil piston head If a spacer ring 111 (Flg. 3a and 5} is arranged, the forward-facing, spaced-apart finger 112 has and creates radial passages 113, which ensure that the flow connection between the Throttle groove Ho and the liquid that is in the space behind the piston head 75 is located by compressing the return spring 98 is not interrupted. The sealing of the overflow channel Ho poses a particular problem because of the high acceleration that occurs in automatic rapid-fire cannons occurs, leads to a dynamic compression of the return spring, which is strongest in the initial phase of the return in its front part adjacent to the Vorhol piston head is compressed.

The space 94 closed in the pre-wood cylinder 7o is at his rear end through the sealing ring 96 of the acceleration piston * head sealed. At its front end is this room with a screw plug 115, through which the Vorhol piston rod 74 extends, which is attached to a seal in the form an O-ring 114 is applied. The advance piston head 75 divides the interior of the advance cylinder into a rear and a front Part shared. The advance piston head 75 has approximately the same diameter as the front bore part 91 and is is not sealed against the bore part 91. The interior of the cylinder can be vented using a clamping screw 116 is loosened and thereby a ball valve 117, which is arranged in the plug 115, is opened.

~ 16 -

00 9833/02 4 8

A jacket bellows 118 extends between the plug 115 and the adjusting nut 83, which forms the extended sealing surface of the Vorhol piston rod 74 encloses,

The prefetch piston head 75 is provided with a check valve 122 in order to facilitate the timely return of the barrel to the forward position for the next round. When the advance piston moves forward, it opens the check valve 122 and then allows a reverse flow of the liquid through several small openings 123 of the advance piston head. The valve 122 has an annular closure piece 124 against its. Seat of one Spring 125 is printed which engages an outwardly facing shoulder or cap 126 which is attached to a central arranged, rearward extension 128 of the Vorhol piston head it is attached. As a result, the openings 123 exposed only during the forward movement of the piston head.

In front of the advance piston head, disc springs 127 are in opposite directions connected in series, which cooperate with the piston head and the plug 115 to cushion the fore-pulling forces.

The advance piston rod 74 is hollow and contains a chamber to refill the liquid in the chamber of the forewood cylinder and to compensate for the thermal expansion of the liquid. A refill piston I3o is displaceable in the refill chamber 131, the piston head of which with an O-ring surrounding it

- 17 0098 33/02 48

is sealed. The refill piston is held by a refill pen 134 pushed backwards. This spring surrounds the refill piston rod 135 and engages a cap 136 which is held in the front end of the advance piston rod 74.

If the volume of liquid in the pre-wood cylinder decreases as a result of cooling or losses, causes the pressure difference between the container 131 and the space 94 that a spring-loaded check valve 138 is opened, which is arranged in the piston head and has a spring-loaded ball. This way becomes a Cleared the way through which the liquid can enter the pre-wood cylinder for refilling »

On the other hand, when the liquid in the preprocessing cylinder heats up, this liquid seeps on the preprocessing piston head past forward, as this piston head is not sealed against the walls of the cylinder. The liquid passes through a small drainage hole 139 in the wall of the fetch piston rod into the refill container and therefore presses the refill piston 13o forward against the refill spring. The refill pen 134 is considerably weaker than the return spring loo, so that expansion of the liquid causes movement of the refill piston and not caused by the accelerator piston 93.

If the liquid expands sufficiently, it moves the refill piston moves forward beyond a radial outlet opening I4o, which extends the side wall of the advance piston rod penetrated so that the liquid between the threads

009833/0248

- 18 -

the adjusting nut 83 and the Vbrhol piston rod seeps out. The outer surface 141 of the pre-wood cylinder is provided with circumferential ribs which enlarge the cooling surface and thereby reduce the likelihood of excessive stretching.

Since the drainage hole 139 is very small and the duration of the return and return movement is very short, the refill piston leads in the west, no movement occurs when the pressure in the fluid chamber 94 is under the action of the return of the advance piston increases momentarily.

The amount by which the refill piston rod 135 moves forward protrudes from the pre-recovery piston rod 74, the amount of fluid contained in the pre-recovery cylinder is proportional. The refill piston rod therefore serves as a dipstick on which the liquid supply is measured with the aid of measuring marks (not shown) can be read, which are provided on the immersion rod and are visible through a recess 142 in the internally threaded sleeve 77.

the description is now based on FIGS. 2, lo-12 and 27 continued. During the reciprocating movement of the lock carrier 29, two are at the front end of the lower part 32 of the lock carrier spaced apart arms 148 and two at the rear end of the lower part 32 at a distance arms 149 arranged from one another are guided in longitudinal guides 15o, which are arranged in the base plate 151 of the housing 6 are. On the upper side of the lower part 32 are raised bearing surfaces at its front end, in the middle and at the rear end 152, 153 and 154 formed with the underside

0 0 9833/0248 - 19 -

of parallel, elongated guide rails 155 in sliding contact which are mounted inwardly from the side walls of the housing. The bolt carrier has a neck portion 156, which the sleeve-shaped upper part 31 with the lower part 32 integrally connects. The side surfaces of this neck part 156 rest on the side surfaces of the rails 155. This will the upper part of the bolt carrier opposite the housing laterally, set. During the reciprocating movement of the bolt carrier in the housing in the longitudinal direction, the guides hold hence the closure in the position in alignment with the pipe.

According to FIGS. 7, Io and 27 are at the front end of the closure Outside locking tabs or locking teeth I6o are provided, which are attached to locking tabs or attack ratchet teeth 161, which are arranged on the inside at the rear end of the tubular extension. In this way, the The shutter is locked in the front position with the barrel. When the shutter rotates from the locking position into one position being in which his teeth I6o with the gaps between his teeth 161 of the tubular extension are aligned, the lock is unlocked and can move backwards away from the pipe.

7, 11 and 27, the closure 28 is in the sleeve-shaped Part 31 of the bolt carrier is axially movable and rotatably mounted and connected to the sleeve-shaped part by a sliding pin 162, which penetrates the closure and is in radial surface scenes 163 extends which are formed on opposite sides of the sleeve of the lock carrier. The sliding pin

- 2o -

0.098 33/0: 2 4 8

is in its position through the inner walls of the housing 6 held. The front and the back of each backdrop are parallel to the pipe axis so that there is limited axial movement of the closure in the sleeve of the wearer is possible, wherein the lock is in the aligned position when the Slide pin 162 arranged in the front part of the scenes is, and in the locked position when the sliding pin engages in the rear gate part. The middle part of the backdrop runs obliquely to the lock axis, so that the lock is rotated between the locked position and the aligned position. With the backward acceleration of the lower part of the The lock carrier acts on the tube through the retractor 36 therefore the sliding pin with the scenes together in such a way that the Lock comes in the aligned position and then together with the bolt carrier is moved backwards.

When the closure leaves the tube, the closure is in alignment and opposite the sleeve of the bolt carrier extended. According to FIGS. 7, 13 and 18, a spring-loaded inner pin 165 is mounted in the neck and the sleeve of the lock carrier, which opposite the The tube axis is radially movable and is pressed upwards into a detent 166 in order to close the lock in relation to the sleeve of the lock carrier in the extended or aligned position keep. A cam stop pin 167 extends outward from the inner pin 165 and runs on elongated cam surfaces which are formed on the guide rails 155 at the top.

- 21 τ BD & 833 / Q248

:. ■■■■ - 21 -

forms are. In this way, the inner tenon 165 becomes in held in its upper or engaged position when the shutter has left the front position, so that the shutter remains extended even when it is under the action of Is subjected to forces acting on the stopping of the bolt carrier at the rear end of the housing and the stripping off Cartridges are returned during fetching. Of the front edge of the inner pin 165 is beveled so that the lock disengages the inner pin when it is in the front Position returns and strikes the barrel, while the sleeve 31 of the breechblock carrier in the course of the advance movement moved even further forward.

An extractor claw 168 extends from the lock forward, which engages the edge bead 169 of a cartridge case. The claw 168 is with the lock by a Pivot pin I7o and is held by a spring 171 in the attack position moves. At the front edge of the claw is provided with an inclined surface 172 with which the claw over the rim of a cartridge runs as the breech advances and engages a cartridge. On the back one A firing pin 173 is at the end of the barrel of the bolt carrier attached by means of a pin 178, which is attached to the walls of the Housing 6 is held in place. The firing pin 173 is slidably mounted in a bore 174 of the closure. In another bore 176 of the breech and an arcuate one Recess 177 (Fig. 171 i »rear end of the sleeve

00983 3/0248

An ejector pin 175 is displaceable on the lock carrier stored. This is held between the lock and the sleeve of the lock carrier by a thickened shoulder 180, which is formed between the ends of the pin and in with each other aligned recesses of the lock and the lock carrier sleeve engages.

According to FIGS. 15 and 19, the buffer arrangement 38 arranged at the rear end of the housing has a plurality of annular disc springs 82 _f which are arranged one behind the other and are aligned with the sleeve 31 of the closure carrier. The disc springs 182 are contained in a cylindrical sleeve 183 which is mounted in the rear part of the housing so as to be longitudinally displaceable. The sleeve has an integral rear end wall 184 which bears against the rear plate 185 of the housing. In the front end part of the sleeve, a piston 186 is slidable in the longitudinal direction. This piston is held against the disc springs by a stop or a screw 187 which is slidably mounted in the piston 186 and the end wall 184 and is screwed into the back plate 185 of the housing. To adjust the preload of the disc springs 182, the screw can be tightened or loosened as desired.

y When the bolt carrier is at the end of its return stroke approaches, the rear surface 190 of the sleeve of the lock carrier engages on the piston 186 so that the disc springs 182 backwards are compressed against the end wall of the buffer sleeve

- 23 0 0983 3/0248

^: - 23 - ■■■ '■' ■

and the return movement of the shutter and the shutter carrier is gradually stopped. The disc springs expand on this again and press the lock and the lock carrier in the front position, whereupon another Shot can be fired.

The sear 41 is pivotably mounted on the underside of the buffer sleeve between its ends, with the aid of a pin 192 which penetrates recesses in two tabs 193 attached to the sleeve. Between the sleeve 183 and the sear is a compression spring 194 which urges the sear down into the trigger notch 42 formed in the upper surface of the lower part 32 of the bolt carrier near the rear end of this lower part.

The trigger 40 is by means of a pivot pin 195 in the Mounted back plate 185 of the housing. It has a front part 44, which engages in a notch 45 formed in the rear end of the lower part 32 of the lock carrier 32 (FIG. 27) is. Thus, the front part of the trigger lies under the sear. The trigger can be operated by hand or by an electromagnet 196 such that the sear from the Trigger notch is held disengaged and the bolt carrier therefore returns to the front position. When released On the trigger, the spring 194 pushes the sear down into the trigger notch, so that the forward movement of the bolt carrier interrupted and the bolt carrier in its rear or

- 24 0098 3 3/02 4 8

Clamped position is held. The force acting on the sear is cushioned with the help of the sleeve 183, which holds the disc springs 182 forward against, the screw head 188 and the piston 186 compresses as the sleeve 183 advances in the housing (Fig. 16).

According to FIGS. 7, 9 and 13, a long recoil spring passes through it an opening 201 in the lower part 32 of the lock carrier. This spring is between the back plate 185 of the housing and the clamped front part of the lower part 32 of the bolt carrier and moves the lock carrier forward. The return spring 200 is guided on a rod 202 which is attached to the back plate of the Housing fastened by means of a pin 203 and in a bore 204 is slidably mounted in the front end of the lower part 32 of the bolt carrier. There is a stop on the rod 202 233 which is stopped by a thickened head 234 at the front end of the rod. The front end of the guide bar 202 extends into the open rear end 107 of the accelerator piston 93. In this way, the rod becomes supported while the bolt carrier moves backwards from the front position.

There is a clamping device is provided which is used to To pull the bolt carrier backwards from the front position into the clamping position. According to FIGS. 1, 2 and 7 to 12 um-. holds the tensioning device a chain 205, which is between the paired arms 148, 149 of the lock carrier and along a central channel 206 in the floor panel 151

009833/0248

■. - 25 -

of the housing 6 extends in the longitudinal direction thereof. At her front At the end, the chain is connected to a tensioning block 207, which is free at the front end when the chain is pulled backwards of the lower part 32 of the lock carrier engages. The block 207 migrates along the channel 206 on a guide rod 208, which extends through a recess 209 of the block into a recess 210 extends at the front end of the housing. At her back At the end, the guide rod of the tensioning device is attached to the housing by means of a support 211 that extends from the base plate is directed upwards. A sprocket 215, which is mounted in the base plate at the rear end of the housing, engages in the chain. To turn the sprocket, a removable Hand crank 216 (see FIGS. 1 and 17) or one not shown Serve power drive. On the rod 208, an elongated spring 220 is guided, the block 207 in its front Seeks to postpone position.

13 and 17, the back plate 185 of the housing is connected to the housing body through an upper and a lower one Pin 217 connected. These pins are removable and pass through eyelets 218 of the housing body and support pieces 214 on the back plate. After removing the pins 217, the back plate together with the parts attached to it, namely the trigger 40, the electromagnet 196, the buffer 38, the sear 41, the cantilever spring 200 for the bolt carrier and the guide rod 202 can be removed from the housing body. Thereafter the lock 28 and the lock carrier 29 can be pulled out of the housing to the rear. The different cones

009833/0248

are now no longer held by the walls of the housing, so that the closure is easily removed from its wearer and can be taken apart.

As best seen in FIGS. 1, 11, 20 to 23, 25 and 27 is, the feed device 7 for the ammunition has a right and a left ammunition guide 228 and a left ammunition guide on opposite sides of the housing 6 at the feed point 30. 229. The similarly designed ammunition guides 228, 229 are used to feed cartridges 27 from a supply to the feed point 30.

The two ammunition guides 228, 229 are with the housing pivotally connected by two vertical support rods 219. These rods are arranged in front of the ammunition guides and pass through upper and lower eyelets 221 on the ammunition guides and upper and lower support pieces 223 on the housing. According to Fig. 11 each support rod 219 has a spring-loaded upper part 222 which telescopes in a sleeve-like lower Part 224 sits. The two ammunition guides are on theirs rear ends by an upper and a lower, horizontal coupling strip 225, 226 coupled to one another. These bars slide in a keyway 227 in the transverse direction of the housing, when the ammunition guides around the holder arranged in front uagsstangen 219 are pivoted. The coupling strips 225, 226 are connected to the ammunition guides by vertical, rear support rods 230 which form the front support rods 219 resemble and enforce aligned recesses that

- 27 0 0 9833/0248

in the strips and in upper and lower support pieces 232, 235 are trained, which differ from the corresponding ammunition guides extend backwards. Each ammunition guide can be from removed from the housing when the mounting rods 219, 230 are pulled apart and removed from their support pieces.

20 to 23, 25 and 27 show the right ammunition guide 228 in its position of use in the area of the housing, while the left ammunition guide 229th away from the housing in the rest position is pivoted. A switching device is provided which is used to switch one or the other of the other to pivot coupled ammunition guides into the position of use. This determines from which supply Ammunition is fed. The switching device has a switching lever 236, which with the help of a telescopic support rod 237 is pivotably connected to support pieces 238, 239 which are attached to the housing behind the right ammunition guide are. The switching lever 236 is connected to the right rear support rod 230 through an upper and a lower bell crank 240, 241 connected, which can be pivoted together with the switching lever 236 about the mounting rod 237 of the switching device are. Each lever 240, 241 is at one end with connected to the switching lever 236 and at the other end with one forwardly open slot 242 which receives the end of the rear support rod 230 for the right ammunition guide. When the switch lever around its support rod 237

β ■ ■

is pivoted backwards, the angle levers 240, 241 cause a movement of the coupling strips 225, 226 for the ammunition

- 28 009833/0248

guides to the right. This moves the right ammunition guide sideways out of the use position and the left ammunition guide moved sideways into the position of use. This is indicated by dash-dotted lines in FIG.

A trigger-like locking member 245 (see also FIG. 17), which can be pivoted at 246 with it, is accommodated in the switching lever is connected to the switching lever. This locking member has an arm 247, which has a latching tab 248 on its upper side which engages in one of three notches 249, 250, 251 in the upper support piece 238. The ammunition guides are therefore pivoted in such a way that the right ammunition guide is in the position of use when the tab 248 is engaged in the foremost notch 249 that the left Ammunition guide is in the position of use when the Tab 248 is engaged in the rearmost notch 251, and both ammunition guides are in the rest position when the tab is locked in the middle notch 250 (see Fig. 28) A spring 252 is arranged in the interior of the switching lever, which spring 252 moves the locking member 245 into the locked position seeks. A downwardly directed arm 253 is pressed to disengage the locking member.

Since the ammunition in an ammunition guide is different may have ballistic properties than the ammunition in the other ammunition guide, a device is provided with the one sighting device depending on the position of the

009833/024 8

- 29 -

Ammunition guides is adjusted. The sighting device has a front sight 255 and a rear sight Lochkiirane 256. According to FIGS. 14 and 25, the rear sight is mounted so that it can be moved vertically in a U-shaped support piece 254, which is open to the front and attached to the top of the housing. A sliding block 257 is provided on the rear sight, which is inserted into a backdrop 258 engages, which is formed in a horizontal, U-profile-shaped support piece 259 which is attached to the coupling strip 225 is attached and to the front surface of the vertical support piece 254 is applied, so that according to the predetermined ballistic properties of the two types of ammunition, the rear sight is raised when the left ammunition guide is in the use position, and the rear sight is lowered when the right Ammunition guide arrives in the position of use.

According to FIGS. 22 to 24, the individual cartridges 27 are through, for example illustrated members 262 of a disintegration belt connected to one another, the details of which, except for the type of The interaction of the belt members with the firearm according to the invention and its feed device do not form part of the invention. The ammunition belts of each supply are in the Ammunition guides along the housing and then through a side Exit opening 263 of the ammunition guide and through opposing side openings 265 in the upper housing part moved laterally inwards through it. The openings 263 and 265 form the feed point 30 of the housing. After Feeding point are the individual cartridges through the effect of the reciprocating buckle stripped from the belt

- 30 009833/0248

and placed in the chamber. This process is described below. The belt links 262 continue to move up through upper openings 266 in the upper part of each ammunition guide and are separated from the belt there, whereupon they fall off the gun.

The ammunition feeder 7 is similar to one another Link stop rollers 270, which interact with similar, inclined links 271 to actuate the feed device, which are formed on opposite sides of the lower part 32 of the lock carrier. The lower part 32 of the lock carrier and the scenes 271 are longer than the stroke of the bolt carrier, so that the stop rollers 270 remain in the coulisse 271 during the entire stroke. The feeders on both sides of the housing are similar to each other, so that for the corresponding parts of both Facilities similar reference numerals are used.

According to FIGS. 22, 23 and 25, each stop roller 270 is approximately centered at the feed point 30 (see FIG. 2) and rotatably mounted in a pawl carrier 272 with a horizontal axis 273 in the vicinity of the longitudinal center of the latter. Each of the pawl carriers 272 is arranged between the lower part 32 of the bolt carrier and one of the ammunition guides. ⁱ The pawl carrier 272 of the sidewall of the housing moves vertically in a rectangular opening 272 to the supply point and away from it. On the front and rear edge of the pawl carrier, an elongated tongue 275 is formed, which in

- 31 009833/0248

each engages a vertical groove 276 in the side wall of the housing. In this way, the pawl carrier is guided in its vertical back and forth movement. In the latch bracket is pre or behind the stop roller 270 one of two similar feed pawls 277 are pivotally mounted and spring loaded outwardly to pass through vertical slots 278 protrude in the inner rare walls 279 of the corresponding ammunition guides and attack the cartridges located in the ammunition guide. The pawls can be freely pivoted upwards. Their downward pivoting, however, is limited by the fact that the lower end of the pawl on the inner wall 280 of the pawl carrier attacks.

When the bolt carrier moves forward, the move Feed pawls 277 down from the position shown in FIG. 22 into the position shown in FIG Cartridge 27c pushed inward by this. The feed pawls are in the foremost position of the bolt carrier under the cartridge to be detected 27c because the pawl springs push the pawls outwards. When the bolt carrier moves backwards, the pawls raise the cartridge 27c in the ammunition guide.

The upward moving cartridge 27c pivots two identical, inwardly facing, spring loaded pawls 283 up out of the way. Of these pawls 283 is shown in FIG. 25 only one shown. The pawls are then returned under the raised cartridge 27c and hold it while the

- 32 - 0098 33/02 4 8

Feed pawls move down to the next cartridge 27d to be recorded. Each pawl is pivotably mounted in a support member 284 which extends on the outside of the ammunition guide and is moved inwardly by a spring 285 to engage the cartridges. The downward pivoting of the The pawl is limited by the abutment * of its lower ends 286 (see FIG. 26) on the support member 284.

An upwardly and inwardly inclined leaf spring 288 guides the upper cartridge 27a sideways to the feed point 30, whereupon the cartridge is stripped off, inserted into the chamber and fired. One end of the guide spring 288 is attached to a rod 290 which extends between two spaced guide arms 291 (See also Fig. 26) - · The other end of the spring is at the top Attached to the end of the ammunition guide. In the middle is that Leaf spring bent around a rod 292 which is fastened to the support member 284 and on which the guide arms 291 are pivotable are stored »

The rear part 302 of the lateral opening 263 of each ammunition guide is narrower than the diameter of the rear part of cartridge 27. The front part 300 of this opening is wider as the widest part of the cartridge 27. The opening 263 connects to an opening 301 in the front wall of the ammunition guide. The raised cartridge 27 is held in the ammunition guide because it is not completely through the narrow rear part 302 of the opening can occur. The cartridge 27 is stationary

009833/02 48 - 33 -

however, as a result of the action of the leaf spring 288 so far through the lateral opening 263 of the ammunition guide that in their Use position of the shutter 28 during its forward movement engages at the rear end of the cartridge 27, stripping it from the belt members 262 and through the front part 300 of the lateral opening 263 and opening 301 pushes forward and inward and thereby introduces it into the cartridge chamber.

The empty belt links 262 are passed through the openings 266 moved upwards in the upper part of the ammunition guides because forward and backward flaps 293 of the belt links (see Fig. 24) in vertical guide grooves 294 in the upper end the spaced-apart guide arms 291 engage

At the feed point 30, the cartridge 27a engages a stop 295, whereby the upward movement of the cartridge at the feed point is positively limited and the cartridge is fixed will. This stop is mounted pivotably about a horizontal transverse axis in the cover plate 296 of the ammunition guide and is therefore forward of the cartridge case from the Pushed away when the cartridge moves forward to the chamber moved towards. A spring 297 sets the stop in its Active position back. The front end of the cartridge is supported by a ramp 299 at the front end of the ammunition guide and from inclined surfaces 298 of the ratchet teeth 161 in the area of the opposite sides of the barrel extension into the cartridge chamber guided (see Fig. 21),

- 34 0 0 9833/0248

When an ammunition guide is pivoted into a rest position is, as for example in Figs. 22 and 23 for the left Ammunition guide and in Fig. 28 for both ammunition guides As shown, the feed pawls continue to move vertically as the bolt carrier reciprocates and here and there, but then the cartridges in the ammunition guide are so far out from the feed pawls, that this rricht attack the cartridges, so that from this Ammunition guide no ammunition is fed. The top one Cartridge is held in the ammunition guide because it cannot pass so far through the rear part 302 of the lateral opening 263 that the cartridge can be removed from the closure is detected. Since the pawls form part of the ammunition guide, they remain effective and hold the cartridges in the ammunition guide, which is therefore used to feed ammunition is ready when it is pivoted into the position of use.

The outer side plate 303 of each ammunition guide can be opened so that the inside of the ammunition guide is accessible will. The side plate is pivotably mounted on the front vertical support rod 219 with the aid of a support piece 304, which is attached to the front end of the side plate and has eyelets 305 through which the support rod is inserted will. The rear edge 306 of the side plate extends backward beyond the ammunition guide so that this edge can be detected for pivoting the side plate.

009833/0248

When the side plate is open, the one in the ammunition guide can Ammunition by pulling up a U-shaped release handle 307 can be removed. This is an extension a U-shaped connector 309, the ends of which are the support rod 290 are surrounded for the leaf spring and attached to this support rod. When you pull the release handle 307, the Guide arms 291 pivoted outward so that the leaf spring 288 is pulled away from the cartridges. This is shown in phantom in FIG indicated * Wires 308 are attached to connector 309 that connect the release handle to the pawls 283. The wires 308 pull the pawls away from under the cartridges

outward when the release handle 307 is pulled. For unloading the K &tione; can then move the cartridges down from the Ammunition guide are pulled out.

Oils mode of operation of the cannon is best understood by means of the description of a complete firing process The cannon begins at the shooting angle shown in FIG. 2 is located. After firing the cartridge moves the tube 5 in the housing 6 back. The one attached to the pipe Recall piston 73 moves in the return of the pipe stationary Vorholzylinder 70 backwards and thereby drives the Accelerator piston 93 to the rear. Since the cross-sectional area of the advance piston head 75 is larger than the cross-sectional area of the acceleration piston head 95, e.g. in Ratio of three to .zitei, the acceleration piston moves backwards faster than the tube and the advance piston.

- 36 009833/0248

The rear end of the rear extension 107 of the acceleration ' piston engages the front end of the lower part 32 of the

Closing carrier and moves the breechblock carrier with an acceleration opposite the pipe backwards. After an initial phase of the return movement of the pipe, e.g. a movement of 13 mm, the accelerator piston 93 has moved backwards so far that for example by about 19 mm that it comes to a stop in the pre-wood cylinder 70, as shown in FIG. In. this point has the accelerator piston to the breechblock carrier 29 has such a movement size issued that the shutter carrier and shutter 28 move rapidly to the rear of the housing. In this The front surface of the advance piston head is also at the point in time 75 moved past the front edge of the wedge-shaped throttle groove 110 in the cylinder wall, so that through this Now liquid can pass the advance piston head. The cross section of the throttle groove decreases towards the rear, see above that the amount of liquid passing through the groove increases at a programmed rate as the Recall piston moved backwards. In this way, the groove works the return spring 98 together in such a way that the recoil force of the tube is cushioned and the tube and the return piston in be stopped in a position in which the Vorholkolben at a short distance from the front extension 101 of the acceleration piston and the tubular extension 48 at a short distance from a shoulder 310 of the housing (FIG. 8).

According to Fig. 7 is during the first part of the return process the lock 28 by the ratchet teeth 160, 161 with the tube

009833/0248 - 37 -

- J I -

locked while the bolt carrier moves backward faster than the breech and the tube and the slide pin 162 of the lock extends through the rear axial part of the Move scenes 163 of the sleeve of the bolt carrier. If the bolt carrier has moved backwards relative to the tube and the bolt to such an extent that the sliding pin 162 of the bolt enters the middle part of the scenes 163 and the shutter Twisted into the unlocked or aligned position, there is Residual pressure in the chamber has already been reduced somewhat, so that the friction between the teeth 160, 161 of the breech block and the pipe is reduced. When the latch has reached the aligned or unlocked position, one follows short dwell time in which the sliding pin 162 passes through the front part of the connecting links 163 of the sleeve of the bolt carrier emotional. When the sliding pin reaches the front end of the link has, the shutter moves relative to the tube and the on the edge bead of the empty cartridge case engaging extractor claw 168 backwards, so that the cartridge case out of the chamber is pulled out and moved backwards with the shutter. The cartridge case is pulled out of the chamber during the slowed return of the pipe between the in 7 and 8 positions shown. During removal of the empty cartridge case is therefore the relative speed between the shutter and the tube is smaller than when the tube would have already stopped, so that the removal of the empty cartridge case is facilitated.

- 38 -

009833/0 248

When the closure 28 begins its backward movement with respect to the tube, the sleeve 31 of the closure carrier is in its rear position opposite the lock and becomes the inner cap 165 pressed by the spring 164 into the detent 166. After the closure has left the tube, the stop pin stops 167 the inner pin in the detent, so that the lock remains in the aligned position until its ratchet teeth 160 again are engaged with the teeth 161 of the tube.

While the lock and the lock carrier are together with move the cartridge case backwards, press according to FIG. 9 the Return spring 98 and the accelerator spring 100, the acceleration piston 93, the return piston 73 and the tube 5 in the in Fig. 2 position shown forward (advance movement). During the initial phase of the advance movement of the pipe, liquid occurs the advance piston head 75 past or through it, both through the wedge-shaped throttle groove 110 and through the openings 123, since the non-return flap valve 122 in the advance piston head opens (FIG. 3a). When the advance piston head Has moved forward beyond the throttle groove 110, the liquid can only in the openings 123 through the Step piston head 75 so that the advance piston is braked. The openings 123 are dimensioned so that the tube reaches the front position before a new cartridge is stripped off, however the tube reaches the front position so slowly that no strong blow is generated at the end of the advance movement. After Completion of the advance movement of the tube, the advance piston 75 rests against the plate springs 127 of the advance cylinder, whereby the The forward pulling force of the pipe is cushioned and the pipe is brought to a standstill.

009833/024 8
is brought. . - 39 -

In the meantime, the lock and the lock carrier have moved backwards into the position shown in FIG. 13, in which the cartridge case directly below an ejection opening 311 in the top of the case and the ejector pin 175 engages piston 186 of the rear buffer assembly. if the bolt carrier changes from the one shown in FIG. 13 to the one shown in FIG 14 moved further backwards, the shutter 28 and the shutter carrier 29 move with respect to the ejector pin 175 backwards so that the front end of the ejector pin engages the empty cartridge case, releases it from the pivoting claw 168 and ejects it through the ejection opening 311. The ejecting force is cushioned by the plate springs 182.

The rear surface of the sleeve 31 of the bolt carrier engages the piston 186 so that the disc springs are compressed backwards and cushion the recoil force of the bolt and bolt carrier. After stopping the return movement of the shutter and its carrier stretch according to Fig. 15 the disc springs 182, .which they the bolt carrier push forward. If the sear 41 is in the lower Position is (Fig. 15), it engages in the trigger notch of the bolt carrier, so that its forward movement is stopped will. According to FIG. 16, the force acting on the sear is cushioned by the plate springs 182 of the buffer arrangement, because the breechblock carrier pushes the sear 41 and the buffer sleeve 183 forward, with the disc springs following are compressed against the screw head 188 at the front. The parts then come to a standstill approximately in the position shown in FIG.

009833/02 ^ 8 - 40 -

Move during the return movement of the bolt carrier the feed pawls upward from the position shown in FIG. 23 into the position shown in FIG. 22, thereby lifting a cartridge 27a into the feed point located in front of the closure (FIGS. 20 and 22).

When the sear 41 is disengaged with the aid of the trigger 40 will or at the end of the return not in its lower Position was, the bolt carrier of the plate springs 182 and the recoil spring 200 for the bolt carrier in the forward position reset. During the forward movement of the breech block carrier and the breech block, the latter grips the rear one End of the cartridge 27 located at the feed point (Fig. 2Γ and 27) and pushes it forward into the chamber of the pipe.

When the bolt and bolt carrier move forward in move the position shown in FIG. 2, the teeth 160 kick the lock between the ratchet teeth 161 of the tubular extension through and then engage the tube itself, thereby stopping the forward movement of the closure. Against it the bolt carrier 29 continues its forward movement. It pushes he the inner pin 165 out of the notch 166 and rotates the Lock 28 in the locked position, while the sliding pin of the lock the middle part of the link 163 of the sleeve the lock carrier wanders through. When the bolt carrier reaches the position shown in Fig. 2, the front part engages its sleeve 31 at the rear end of the tubular extension 48, so that the bolt carrier comes to a standstill. The impulse to catch up

-009833/024 β - 41 -

the bolt carrier is on the relatively heavy tube and the advance piston 73 transferred and cushioned by the disc springs 127 in the advance cylinder. At the same time the bolt carrier moves the firing pin 173 through the opening 173 of the bolt against the cartridge, so that this ignited and the whole Process is repeated.

According to Fig. 22, the cartridges emerge from the right and left Ammunition guide 228 and 229 from each other with respect to the barrel axis opposite quadrants into the feed point, while the empty cartridge cases are ejected upwards into a third quadrant and the lower part 32 of the breechblock carrier extends downward into a fourth quadrant. This creates a mutual interference between the fast moving Bolt carrier 29 and the cartridges 27 avoided.

What speeds and forces in the operation of this cannon occur, it follows that an embodiment of the cannon according to the invention with a barrel of about 23 kg and a Bolt carrier of about 5.4 kg grenades of 25 mm determined and is suitable for delivering 700 rounds per minute, the bolt carrier moving back and forth at about 13.7 m per second.

29 shows another embodiment of the advance and acceleration device . In this embodiment are a Pre-wood cylinder 312 and a pre-recovery piston 313 with the housing 6 or the tube or barrel 5 is connected similarly to the pre-wood cylinder

009833/0248 - 42 -

1578A27

70 and the retraction piston 73 In the Flg. 3a and 3b. The Vorholzylinder However, 312 does not contain any liquid. An acceleration lever 314 is pivotably mounted in the housing at 315, which engages the front end of the lower part 32 of the lock carrier. Extends rearwardly from the advance piston head 317 an accelerator piston rod 316 pivotally connected to lever 314 by a handlebar at 318. The relationship between the distance between the two joints 315, 318 of the lever 314 and its length determine the acceleration of the lower part 32 of the bolt carrier with respect to the barrel or barrel 5.

When returning, the fetch piston head 317 moves backwards with the tube or barrel. In its initial phase, the rewind only braked by a relatively weak compression spring 320, which is arranged behind the piston head. After moving backwards of the advance piston head 317 over a predetermined distance, this piston head engages a piston 322, the rests against several disc springs 323, which are arranged in opposite directions one behind the other and form a relatively strong spring, which cushions the recoil force of the tube or barrel 5 and returns the barrel or barrel to its forward position while the bolt carrier 29 continues its rearward movement. The advance movement of the tube or barrel is as in the embodiment according to FIGS. 3a and 3b cushioned by the front plate spring 324. The buffer arrangement shown in FIG with spring and handlebar is applicable in smaller weapons in which the recoil and recoil forces and the weight of the tube or

- 43 009833 / 02A8

Barrel and bolt carrier are smaller than in the Cannon shown in Fig. 2.

Fig. 30 shows a control circuit for controlling the firing mode of the automatic firearm, for example between fully automatic and semi-automatic shooting. A fully automatic shooting is often desirable when using explosive ammunition. Armor-piercing ammunition is usually semi-automatic Shoot more appropriately so that the firearm is fresh for each shot can be set up.

According to FIG. 20, a normally open contact switch 330 has an arm 331, attack on which the switching lever 241 to close the switch can when the switching lever in the one shown in phantom Position is pivoted, i.e. the left ammunition guide 229 provided with explosive cartridges in the use position opposite the breech and the * feed pawls and the right ammunition guide 228 containing the armor-piercing ammunition the position of use is moved out. This will make the firearm prepared for automatic shooting.

According to FIG. 30, when automatic shooting, when closed Switch 330, the electromagnet 196 for actuating the trigger is fed by a battery 336 as long as the release button is pressed 332 of a remote control device 334 is depressed.

If the switch 330 is on the other hand for semi-automatic Shooting with armor-piercing ammunition from the right ammunition

009833/0248 ■ ..

- 44 -

leadership In its normal open state, the Pressing the release button 332 of the remote control device of the electromagnet 196 to operate the trigger only via the. Normally closed contact 339 of a control relay 341 is fed. This relay 341 is switched on when the release button 332 is pressed, pulls but with respect to the electromagnet 196 with such a delay that the electromagnet only pulls the trigger 40 for delivery a single shot can operate before the break contact 339 of the control relay is opened.

Depending on the position of the switching lever 241, the switch 330 and the circuit assigned to it are used for Controlling the firing mode of the firearm according to the type of ammunition fired.

- 45 -

009833/0248

Claims (12)

1578Λ27 claims; 1.) Automatic firearm with a housing that houses an ammunition feeder ungs point has at the cartridges are fed to the housing, further with a barrel or barrel, the or the is mounted in front of the feed point in the housing, one Ammunition feeding device attached to the housing is and is used to successively feed the cartridges to feed, as well as a closure device, which is located in the Moved back and forth in the longitudinal direction of the housing, successive cartridges stripped from the feed point and they introduces into the cartridge chamber of the barrel or barrel, characterized in that the ammunition feed device at least two ammunition guides (228, 229) which serve to supply ammunition from various supplies feed, and an actuating device (236, 277) for selectively actuating one of the ammunition guides. 2. Automatic firearm according to claim 1, characterized in that the housing on different sides in the area of Feed point has ammunition receiving openings (265), the ammunition guides on different sides of the housing are arranged in the vicinity of the ammunition receiving openings and the switching device for selectively actuating one of the Ammunition guides one for each of these ammunition guides Includes feed pawl (277) by the locking device is driven> to advance cartridges through the guide - 46 - 00983 ^ / 0248 1578A27 slide, as well as a switching device (236, 225, 226), the is movable between different positions to operate the feed pawls in the various ammunition guides or render it ineffective. 3. Automatic firearm according to claim 2, characterized in that the ammunition receiving openings are arranged on opposite sides of the housing, the two ammunition guides are also arranged on opposite sides of the housing, in their inner side wall (279) each have an ammunition discharge opening (263) which is aligned with the corresponding ammunition receiving opening in the housing, and in their inner side wall below the ammunition discharge opening each have an opening (278) for the feed pawl, the feed pawls are arranged on opposite sides of the housing such that they can be reciprocated vertically and with the openings provided in the ammunition guides for the feed pawls are aligned, the feed pawls are driven by cams (271) which point to each other Sides of the locking device are arranged, each ammunition guide relative to the housing in a first position is movable, in which this ammunition guide is in Area of the housing and with the corresponding / Feed pawl and ammunition receiving opening cooperate, and in a second position in which the cooperation the ammunition guide with the corresponding ammunition receiving opening and feed pawl is canceled, and the switching device mechanically in such a way with the ammunition guides 009833/0248 - 47 - is coupled that each one of them in the first and the other is moved to the second position. 4. Automatic firearm according to claim 1, characterized in that the actuating device for optionally actuating one of the ammunition guides has a switching device (236, 225, 226) which can be moved between different positions to select different ammunition guides 1st, the firearm has an adjustable straightening mechanism, in particular in the form of a sighting device (256, 254, 259), and this straightening unit is coupled with the switching device and can be moved into different positions by moving them, whereby the aiming angle of the firearm is changed. 5. Automatic firearm according to claim 1, characterized in that the actuating device for optional actuation one of the ammunition guides has a switching device (236, 225, 226) which is used to select different ammunition guides is movable between different positions, and the firearm has a device (Fig. 30) for control the type of shooting depending on the position of the switching device. 6. Automatic firearm, in particular according to one of the claims 1 to 5, with a housing that has an ammunition guide part possesses, on the cartridges are fed to the housing, further with a barrel or tube, the or the before Feed point is mounted in the housing, an ammunition 009833/0248 - 48 - Feed device which is attached to the housing and serves to feed cartridges one after the other to the feed point, as well as a closure device which moves back and forth in the longitudinal direction of the housing, strips successive cartridges from the feed point and puts them in the chamber of the barrel or barrel introduces, characterized in that the locking device has a lock (28) and a lock carrier (29) which has a relatively short sleeve (31) in which the lock is mounted and which is axially aligned with the barrel or barrel, and one relatively long lower part (32), which is arranged below the sleeve of the bolt carrier and is longer than the stroke of the bolt carrier, the barrel or the tube is mounted axially reciprocating in the housing, between the barrel or tube and the housing a retractor (36) for cushioning recoil and retraction forces switched on below the barrel or barrel and in front of the lower part of the bolt carrier is arranged, is aligned with this lower part and has an accelerating member (93) which engages at the front end of the lower part of the bolt carrier when the barrel or tube returns and accelerates the bolt carrier relative to the barrel or tube when it returns, and at the rear end A buffer arrangement (38), which is aligned with the sleeve of the bolt carrier, is mounted on the housing for cushioning the recoil force of the bolt carrier. 7. Automatic firearm according to claim 6, characterized in that that the lower part of the bolt carrier in the vicinity 0 09 8 3 3/02 A 8 - 49 - 1575427 its rear end has a trigger notch (42) on which Buffer assembly, a sear (41) is mounted, which can be used to interrupt the forward stroke of the bolt carrier can be brought into engagement in the trigger notch, and the buffer arrangement can be compressed back and forth to cushion the recoil force of the breechblock carrier or the advance force acting on the sear. 8. Automatic firearm according to claim 6, characterized in that the lock in the sleeve of the lock carrier between a front and a rear position axially and is moveable, the sleeve of the lock carrier has a cam (163) which serves to move the lock around its Axis in a locked and an unlocked position opposite to rotate the barrel or barrel when the breechblock is off with respect to the sleeve in its front or rear position moved, an inner pin (165) mounted in the bolt carrier is the one to releasably hold the closure in its front position opposite the sleeve of the bolt carrier can engage in a notch (166) of the closure, and. an elongated cam (155) is mounted in the housing and extends along the path of the lock carrier and a cam stop (167) engages the inner pin, moving along the elongated curve piece to the engagement of the inner pin in the closure during a To maintain a predetermined part of the stroke of the bolt carrier. Q09833 / 024 & 9. Automatic firearm according to claim 6, characterized in that it extends over the length of the lower part of the bolt carrier at least one curve (271) extends and the ammunition feed device from a curve stop (270) is driven, which is on the curve of the lower part of the bolt carrier attacks. 10. Automatic firearm according to claim 6, characterized in that the housing has ammunition receiving openings (265) on different sides in the region of the feed points, two curves (271) extend along opposite sides of the lower part of the bolt carrier, the ammunition feed device zr.i, ammunition guides (228, 229), which are arranged on opposite sides of the housing in the vicinity of the ammunition receiving openings, the ammunition guides are each assigned a feed pawl (277), which is used to advance cartridges through the relevant guide, with the two curves on opposite sides _r cooperating of the bottom part of the bolt carrier two cam stops (270) sides which serve for driving the feed pawl, and a switching device (236, 225, 226) is provided which is movable between different positions in which the various feed pawls in) ammunition guides effective or . unir are ksam. 11. Automatic firearm according to claim 6, characterized in that the passer has a hollow pre-wood cylinder (70), .; ■ ■ '■. . -; ■. ■■■■ ": ■ .- ■ .-. ■■■ - si - 003833/0248 which is mounted on the housing and arranged below the barrel or ν tube parallel to its axis, is aligned with the lower part of the bolt carrier and inside a fluid-filled chamber with a larger diameter, front part (91) and a smaller diameter , rear part (92), the retractor also has a retraction piston (73) connected to the barrel or tube, which is mounted axially to and fro in the larger diameter part of the chamber, a retraction spring (98), which in the larger diameter part of the chamber and tends to move the advance piston · in the cylinder forward, and an acceleration piston (93), which in the smaller diameter, rear part of the chamber reciprocally mounted and is suitable, through the to engage the open rear end (72) of the forewood cylinder on the front end (97) of the lower part of the bolt carrier, the acceleration piston has a closed tubular member (101) which extends forward within the recoil spring extends and in which a return spring (100) is mounted is / which seeks to move the acceleration piston in the pre-wood cylinder forward, and a device (110, 122) is provided, which serves to facilitate the passage of fluid past or through the advance piston to control during its return and its Vorholhubes. 12. Automatic firearm according to claim 11, characterized in that that the device for controlling the passage of the '- ■■■ 009833/0248 '- 52 - Fluid has an overflow opening (110) past the recovery piston or through the recovery piston, which are provided in the inner wall of the VorholZylinders and so is designed that they during the return of the return piston allowing a decreasing amount of fluid to pass past the recovery piston, and at least a check valve (122) restricting a flow of the fluid permitted by the advance piston during its advance stroke. 0 0983 3 /02.4-8