FR2672379A1 - AUTOMATIC FIREARM WITH CYLINDRICAL CYLINDER HEAD. - Google Patents

Abstract

Cylindrical breech automatic firearm. This automatic firearm is characterized in that there has been provided a movable stop coupled to a cocking mechanism, this stop being, when the cocking mechanism is not actuated and the breech is in position. feed, in front of the end of the chamber opposite to that through which a new cartridge is introduced. Armament.

Description

The invention relates to an automatic firearm with cylindrical cylinder head

  on an automatic firearm for cartridges without a case, preferably a rifle, provided in a piece integral with the barrel of a cutterectangle with respect to the axis of the barrel, in which a cylinder head for

  the essential of cylindrical form is arranged coaxial-

  and rotates about its longitudinal axis for feeding, the breech including a chamber aligned with the barrel when the breech is in the firing position, and provided with a mechanism for tilting

  the breech from the firing position to the feed position

  the chamber being designed so that a cartridge can be engaged by either end, with a manual arming mechanism which ejects when arming the cartridge in the chamber by the opposite side to the one by which is

introduced the new cartridge.

  A weapon of this type is described in DE-A zo 28 13 633. On this known weapon, the chamber has stops that stop the movement of engagement of the cartridge, these stops coming into contact with the ranges of the propellant charge when the cartridge is inserted, these stops immediately stop the very fast engagement movement of the cartridge during the feeding, the projectile pulse protruding from the front of the propellant charge being absorbed only by the forces of adhesion holding the projectile in the propelling charge This limits the speed of maximum engagement of the cartridge It also seems possible, in

  particularly under exceptional climatic conditions

  and in particular in the presence of large variations in temperature, that in rare cases the projectile of a cartridge becomes unstable under the effect of the braking process described. If such a cartridge is not pulled but removed from the disarmament weapon and reloaded later, it is possible that the game of the projectile increases which would make conceivable

  malfunctions of the weapon.

  The object of the invention is to give a weapon of the type described above a configuration reducing the

  possibility of malfunction.

  This problem is solved according to the invention as far as

  o a movable stop has been provided coupled with a mechanism

  arming device, this stop being, when the

  arming mechanism is not actuated and that the culas-

  is in the feeding position, in front of the end of the chamber opposite to that through which a new cartridge is introduced, at the front end of the cartridge fully engaged in the chamber, and can be disengaged from the end mentioned from the

  chamber by means of the arming mechanism.

  According to the design of the cartridges provided for this weapon, this has the following advantages: t If the tip of the projectile protruding from the front of the propelling charge reaches approximately the lap of the cylinder head at the level of the chamber, it is possible to arrange, depending on the dimensions of the cartridge, the stops located inside the chamber so that the movement of engagement of the cartridge is normally stopped by the movable stop whose position and shape will be, as provided in an embodiment of the invention, such in this case that the stop is at least at the point of the projectile of the fully engaged cartridge This excludes the projectile take the game because the mass of the propellant simply braked in this case by the projectile, is relatively weak The stops provided inside the chamber are used in this case only to limit, in firing position, the movement of the c artouche so that the firing by the firing pin

is done reliably.

  If the shape of the cartridge and / or the layout of the

  stops in the room is such that during the engagement

  The point of the cartridge does not come into contact with the movable stop so that, as on the known weapon, the movement of engagement of the cartridge is

  only stopped by the stops provided in the chamber.

  In this case, the movable stop ensures a safety function because it prevents a projectile having play in the propellant charge from being detached from the propellant charge and sliding forward, which causes serious operating defects. In the presence of such a projectile having play, it is normally

  still possible to draw the cartridge after its introduction.

  duction and tilting of the bolt in firing position.

  However, the invention also makes it possible, as provided for in one embodiment of the invention, to dispense with

  full of stops inside the chamber.

  According to this embodiment of the invention, it is provided that the shape of the chamber allows a cartridge to pass through it completely since there is no longer inside the stop chamber which is even to stop the engagement movement, the stopping of the engagement movement is ensured in this case by the movable stop provided according to the invention Again, the movable stop can be located adequately in the

level of the projectile point.

  It is thus possible, on the weapon according to the invention, to obtain a reliable positioning of the cartridge or at least a part of the cartridge, namely the

  projectile and thus to avoid malfunctions

the weapon.

  An advantage of this embodiment lies in the fact that the ejection of a cartridge from the chamber can be carried out in the same direction as that of the engagement.

  of the cartridge in the chamber In the example of execu-

  tion described later, the ejection of a cartridge is generally effected in the opposite direction to that of the engagement, in particular by the pressure exerted at the time of arming by the newly engaged cartridge or by the ejector on the tip However, it is conceivable that the ejection by means of the arming mechanism is not possible because, as a result of a fault, the ejector did not come

  align with the room while the store is empty.

  In this case, after the arming (the magazine being empty), the chamber will be in this example of execution in a position aligned with the axis of the barrel the tip of the cartridge being however directed towards the back If the shooter engages now a new magazine in the weapon and if it resets, the cylinder head will perform on this example of execution a new rotation of 900 so that the cartridge which had not been ejected until now is found in the same position if it had just been loaded The new cartridge engaged in the chamber during arming expels the cartridge to be ejected, the mobile stop releasing the passage at the end of the

  opposite room to that by which the new cart-

  is committed, which is due to the fact that the engagement of the new cartridge results from the actuation of the

arming mechanism.

  Another advantage of this embodiment lies in the fact that the absence, inside the chamber, of stops intended for the positioning of the cartridge, reduces in a particularly simple way the risk of a setting. spontaneous fire (cook-off) of the cartridge. Such stops protruding inside the

  room tend to warm up strongly.

  In this form of execution it is advantageous and

  tun to use a cartridge whose propellant charge -

  at least in some parts of a section passing through the front end of the cartridge extends

  at least almost to the point of the projectile.

  These extreme parts of the propulsive charge make it possible to limit in a simple manner the possibilities of moving the cartridge in firing position and by

  therefore a single firing by firing pin.

  When using such a cartridge whose projectile is housed almost throughout its length in the propellant charge (telescopic cartridge) and thus bound over a large area to the propellant charge, it is also possible to arrange the movable stop so that at the engagement of a cartridge it does not come into contact with the projectile but only with the propellant charge In this case also the stop is

  located outside the room.

  In order to create by simple means a stop at the front of a telescopic cartridge in firing position, it is provided according to one embodiment of the invention that at least one diameter of the section of the recess of the piece secured to the barrel in which is housed 7 - the end of the breech-side barrel, is less than the corresponding diameter of the cartridge It follows that the periphery of the recess constitutes a stop for

the cartridge.

  This feature being described in the document mentioned at the beginning is in fact known but is not intended to determine the position of the cartridge and thus to avoid operating defects The recess preferably has a round section and the cartridge

  has a rectangular section in the execution example

  preferably square, which can be modified at the front end by cutting or chamfering

corners.

  The mobile assembly of the movable stop is particularly

  easy to perform on an embodiment of the invention

  on which the movable stop is pivotally mounted.

  In one embodiment of the invention in which the weapon has an ejection duct (hereinafter simply called duct) through which the cartridge is expelled, it is provided that the ejection channel is mobile and

  constitutes the movable stop when the weapon mechanism

  is not actuated and that it comes to align with the chamber in ejection position when the mechanism

arming is activated.

  The advantage here lies in the fact that there is a multitude of design possibilities of the control mechanism of the movable stop, because a mechanism actuating the movable stop can for example act on the end of the duct opposite to the bolt The duct can, according to one embodiment of the invention, slide, according to a

  Another embodiment of the invention may be

  In the exemplary embodiment, the pivot axis is parallel to the pivot axis of the cylinder head. However, this is not imperative, quite the opposite, if the width of the weapon allows it, it would be possible to provide a pivot axis of the

  led parallel to the axis of the barrel core.

  In one embodiment of the invention, there is provided a rotary control disk, in junction actuated with the arming mechanism, which has sectors of different outer radius and a bevel that comes into contact during rotation with a arm of a spring return slide, which it moves, and a spring lever meshing with a piece integral with the movable stop and pivoting under the action of the movements of the slide so as to control the movable stop thus creates a simple and reliable control mechanism for the movable stop. The slide can be advantageously used as a shutter element in the

  Shutter mechanism described below.

  In one embodiment of the invention it has been provided that an ejection orifice of the weapon can be closed by a shutter mechanism coupled to the cocking mechanism and opens only when the mechanism This prevents fouling of the weapon by penetration of impurities in the ejection port because this ejection port is open only when it is armed. This is also a prevention of malfunctions. the gun The slide is a particularly simple shutter mechanism. In one embodiment of the invention, there is provided a rotating disk, in operative junction with the arming mechanism and mechanically coupled to another rotating disk; this other disc is mounted in front of an ejection orifice of the weapon and has a cutout which releases the ejection orifice in a predetermined position of this other disc which is also provided with a control cam which comes into contact, during the rotation of this other disc, with a movable element carrying the movable stop and the actuates the mechanical coupling is advantageous

  from the point of view of a silent operation for example.

  In one embodiment of the invention, a spacing between the end of the barrel and the barrel end of a cartridge in firing position has been provided. This reduces the risk of spontaneous firing. (cook-off). In one embodiment of the invention, a cartridge without a case, in the form of a telescopic cartridge, has, as an adaptation to the weapon, at the front and rear end of the propellant charge a convex rounding adapted to the breech radius If the cartridge has a rectangular section (not square) it is sufficient that this rounding extends in a plane If the cartridge has a square section so that it can be engaged in the chamber in positions that differ from each other. an angle of rotation of 900 about its longitudinal axis,

  the rounding extends in at least two planes which are

  parallel to one of the longitudinal sides of the cartridge The rounding could however also be

a part of spherical surface.

  Other features and advantages of the invention

  mentioned in the description of examples of

  invention based on the drawing showing essential details of the invention and in

  the claims An embodiment of the invention

  can present the different individual characteristics

  The figures represent: Fig 1 a longitudinal section in the vertical plane of a weapon, passing through the axis of the soul, the charged chamber being in firing position, Fig 2 a section in the ' same plane as FIG 1, the chamber having tilted 90 in the direction of the clock and the cartridge therein being ejected by a new cartridge from the store,

  Fig 3 a section in the same plane as fig 2 the food

  4, a partial section along the line V-IV of FIG. 2, FIG. 6 is a partial view along the line VI-VI of FIG. FIG. 5 is a view along line VII-VII of FIG. 5, FIG. 8 a view of the duct in the direction of arrow VIII of FIG. 2 without support, FIG. 9 a view from above in the direction of the arrow. 1 X of Figure 8 of the duct with support, partly in section, Fig 10 the duct partially in longitudinal section, partially in side view, Fig 11 a section corresponding to Figure 2 of a weapon according to a second example of FIG. 12 is a view in the direction of the arrow XIII of FIG. 12 without an ejection duct. FIG. line XIV-XIV of fig 13, showing only the visible parts on

fig 13.

  The figures include only the parts necessary for

  understanding of the invention and are not

  The control mechanisms mentioned are the same as those of the weapon described in document DE-A-28 13 633 and the corresponding document: US Pat. A-4 348 941 By this reference the content of the documents referred to is considered to be an integral part of this specification.

breve t.

  As shown in FIGS. 1 to 3, the piece 2 secured to the

  barrel i of the weapon has a bore 3 essentially.

  cylindrical whose axis is perpendicular to the axis of the barrel and cuts the latter This bore 3 serves as housing for an essentially cylindrical cylinder head 4 which pivots about the axis of the bore 3 In FIG. 1, this cylinder head is shown in the firing position In this firing position, a chamber 9 made in the yoke 4 is aligned with the core 5 of the barrel 1 A cartridge without a case 6 located in the chamber 9 consists of a projectile 7 and a propellant 8 The projectile 7 is entirely embedded in the propellant charge 8, it is a telescopic cartridge there is at the tip 10 a radial free space between the projectile and the propellant charge 8 The cartridge 6 presents on entire length a section

  square At the rear end 13 it has an arround

  di spherical, the propellant charge 8 being also rounded at the front end 14 but there only on an annular surface because of the free space 11 The tip 10 does not exceed the mentioned spherical surface which constitutes the rounding of the front end 15. On the side of the bore 3 opposite the core 5 of the barrel 1 is a bore 21 in which is housed as outlined a striker 22 This striker 22 is projected by a 13 - dog 24 on a armor 23 located at the rear end of the cartridge which causes the firing of the cartridge 6 housed in the chamber 9 The striker 22 is normally in the position shown in Fig 1, position in which its front end does not exceed the cylindrical surface

bore 3.

  If the cartridge shown in FIG. 1 in the chamber 9 is pulled, the automatic weapon, which is in the example a rifle, but which could also be a submachine gun for example, performs an automatic loading during which the bolt 4 rotates clockwise 900 relative to the position of Fig 1 and a supply element 94 engages in the chamber 9 the last cartridge in Figure 1 is shown on the right, this cartridge being in This magazine 25 is a magazine in which the cartridges 6 are arranged perpendicularly to the firing direction, the tips 10 of the projectiles 7 being oriented towards the axis of the barrel. The cartridge 6 is in the first position. position (last position in the firing direction) in the magazine is aligned with the chamber 9 of the cylinder head 4 when the latter is in the feed position As described later and

  as provided also on the weapon according to document DE-

  A-28 13 633, a cartridge housed in the chamber can be ejected from the chamber 9 and the weapon on the opposite side

at the store.

  Room 9 is designed so that it does not show any

  stop limiting the displacement of the cartridge to engage.

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  In particular, the chamber 9 does not include any part that limits the section of the chamber to a value smaller than the largest section of the cartridge. In the exemplary embodiment, the cartridge does not have different sections but an identical section over its entire length.

  length except at the ends at the rounded edges.

  After pivoting of the cylinder head 9, in the position described at the moment, it is perpendicular to the axis of the barrel 1 and one of its open ends is opposite the magazine 25 fixed on the barrel 1 of the armed,

parallel to this one.

  Since the chamber 9 of the weapon described here has no stops limiting the longitudinal movement of the cartridge 6, the movement of engagement of the

  cartridge introduced into chamber 9 during feeding.

  This stop is a part of the wall 32 of a pipe or tubing or a section of tube 34 whose passage section is adapted to the section of the cartridge Ce * fi The tube section 34 pivots within certain limits about two axes 36, their axis of rotation being parallel to the axis of the cylinder head 4. In the position of the pipe section 34 shown in FIG. upper part of the section is in contact with a stop 38 located on the part 2 integral with the barrel, which prevents the tube section 34 from

  rotate in fig 1 in the opposite direction of the clock.

  The stop 30 is directly outside the edge of the cylindrical surface which defines the bore 3 In the indicated position of the tube section 34, the stop 30 is placed in such a way that the tip 10 of the projectile of a cartridge newly engaged in the chamber 9 comes to bear on this stop 30 as shown in Fig 3 After complete engagement of this cartridge in the chamber 9, the automatic weapon prints the cylinder head 4 a new rotational movement in the direction of the clock, the inserted cartridge being again in the position relative to the barrel 1 shown on

FIG.

  In the case where in the position of the cylinder head 4 shown

  in Fig. 3, the newly engaged cartridge exceeds

  somewhat of the lower end of the chamber 9, the integral part of the barrel has an oblique bearing 40, the bore 3 enlarging slightly at this point, so that the oblique bearing 40 pushes the cartridge 6 by its front end in the chamber 9 when the yoke 4 pivots from the position shown

  in FIG. 3 in the position shown in FIG.

  The barrel 1 has at its rear end a cicular tip 42 housed in a bore 44 of the piece 2 integral with the barrel This bore 44 extends rearward, so to the right in FIG 1, to the Bore 3 The diameter of the bore 44 is smaller than the diagonal dimension of the cartridge 6 so that the integral part 2 of the barrel prevents the cartridge 6 whose front end is oriented as shown in FIG. of the chamber 9 in the direction of the barrel 1 This ensures reliable firing of the cartridge by the firing pin 22 and allows 16 - additionally, when it comes to unload the weapon, the cylinder head 4 to rotate without hindrance of 900 in the sense of

  the clock with respect to the position of fig 1.

  The diameter of the bore 21 is also smaller than the diagonal dimension of the cartridge 6 which prevents the cartridge 6 oriented as shown in FIG.

  slide back out of room 9.

  The rear end of the tip 42 has a space

  free in relation to the propulsive charge 8 and the -

  the projectile 7 of the cartridge 6 in firing position; this reduces the risk of spontaneous firing.

  surface of the bore 3 which supports nearby im-

  mediate the bore 44 the front end 15 of the car-

  key, is located on a relatively massive metal part, namely the piece 2 integral with the barrel, so that the rapid heat dissipation of this piece of the bore 3 serving range also reduces

  the risk of spontaneous firing.

  As long as the weapon carries out the loadings automatically, the length of tube 34 remains, and therefore the stop 30

  also, in the position shown in fig 1.

  Figures 1 to 3 are used as a basis in the following

  description of how the weapon works when it comes

  to eject a cartridge 6 shown in firing position

  in fig 1 because it was not fired.

  For this purpose, I possess an arming mechanism which the shooter must actuate by turning a cocking button 122 (FIG. 5). When the cocking mechanism is actuated, a control disk 50 is located in a cockpit.

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  plan anterior to the sectional plane of Fig 1 to 3 and for this reason only sketched dotted, rotates in the opposite direction of the clock in the views of Figs. 1 to 3 The cylinder head 4 pivots at the same time 90 in the clockwise direction from the position shown in FIG. 1 to the position shown in FIG. 2. The control disk 54 forms a cam disk consisting of two sectors of circle of different radius, namely the part 52 having the large radius and the part 54 with small radius In the upper part in FIG.

  between the two parties 52 and 54 a brief transi-

  tion constituted by an inclined plane 55 forming an edge with the portion 52 while in the lower part in Figure 1 the transition is constituted by an inclined plane 57 and a straight portion 56 whose end forms an edge 59 with the portion 54 This small control disk 50 is used to tilt the pipe section 34 and to open or close the ejection port 58.

of the weapon.

  A spring with branches mounted on an axis 60, fixed on the piece 2 integral with the barrel, has a branch 61 which bears on a stop 62 of the piece 2 integral with the barrel and another branch 64 which extends on an axis quasi-parallel to the axis of the barrel 5 towards the rear, to the right in FIG. 1, and whose end 66 in FIG. 1 rests on a stop 68 of the wall 70 of the tube section 34, this wall being the left one on the section of the pipe section of fig 1 Above

  of the stop 68 there is a stop 72 on which

  The end 66 of the limb 64 when the limb 64 moves upward in the position of FIG. 1, the branch 64 exerts via the abutment 68 on the tube section 34 a torque in the opposite direction of the clock which holds the tube section 34

in the position shown.

  In FIG. 1, the view shows the edge of the branch 64 At its end 66, the branch 64 is provided with an ear 75 folded so as to be parallel to the sectional plane of FIG. rear or face 77 of the ear 75 forms a stop in contact with a stop 78 integral with the stopper 68 When the tube section 34 is subjected to mass inertia forces which |, tend to rotate it in the sense of the clock, such a movement is not only impeded by the pressure lt of the branch 64 on the projection 68 but also blocked t by the edge 77 and the stop 78 which bear on the axis 60 via the branch 64 Grice to this support, the branch 64 is subjected, in the presence of die forces mass, to a pressure substantially oriented in the longitudinal direction which allows the branch 64 to absorb without significant deformation of

relatively large forces.

  The lower part of FIG. 1 has a slider, see also FIG. 4, sliding parallel to the axis of the fender 5 of the barrel 1. The major part of this slider 80 is located in front of the cutting plane of the slider. 1 and is therefore shown in dashed line. The slider 80, however, has a bend 82 which extends as far as the plane of the drawing and has therefore been shown in section. The slider 80 also has an arm 84 which extends into the plane of the control disk When actuation of the cocking mechanism rotates the control disk 50 in the opposite direction of the clock in FIG. 1, the inclined plane 57 of the disk of FIG.

  as 50 comes into contact with the arm 84 of the slide

  bucket 80 and moves the slider against the force of a spring 85 to the right in fig 1 This also moves to the right and opens a sliding cover 86 which is fixed to the slider and which closes in FIG 1 the ejection port 58 When moving the slide, the elbow 82 comes into contact with a projection 88

  provided on branch 64 and thus pivot the end

  mite 66 of the branch 64 upwards which has the effect of making the end 66 come into contact with the stop 72 and of rotating the tube section 34 in the clockwise direction until a bearing 90 of the tube section 34 comes into contact with an abutment 92 of the part 2 integral with the barrel In this position the tube section 34 is exactly vertical and the ejection duct that it constitutes is aligned with the chamber 9 of the yoke 4 which has meanwhile adopted the position shown in FIG. 2, shifted by 90 in

  the direction of the clock compared to that of fig 1.

  When the actuation of the cocking mechanism continues, the feed element 94 engages in the

  room 9 a new cartridge 6 from the store 25.

  The projectile tip of this new cartridge comes into contact with the projectile tip of the cartridge that is still in the chamber, and pushes the cartridge down, out of the chamber and into the weapon through the air duct. ejection and the ejection port 58 While this actuation of the arming mechanism continues, the control disk

50 also continues to rotate.

  When the pieces of the weapon are in the position shown in FIG. 2, the edge 59 of the control disk 50 just keeps the arm 84 in the position indicated. It is sufficient for the control disk 50 to turn slightly further so that the edge 59 releases the arm 84 and the latter moves to the left under the force of the spring 85 acting on the slide 80 until it comes into contact with the portion 54 of the control disk 50, close to the inclined plane 55 This therefore results in a slight displacement of the sliding cover 86 which does not shrink the ejection orifice 58 At this time, the cartridge to be ejected is still partially in the chamber 9 and in part in the tube section 34 The displacement of the slider 80 described at the moment brings out the bend 82 of the zone o is the boss 88, the branch 64 of the spring branches which bears again on the abutment 68, having then tend to pivot Again, the tube section 34 in the position shown in FIG. 1 is however not possible due to the presence, partly in the tube section 34, partly in the chamber 9 of the cartridge preventing this pivoting. As soon as the new cartridge 6 engaged in the chamber 9 has expelled the cartridge to be ejected from the chamber, the section of tube 34 begins to pivot under the force exerted by the branch 64 of the branch spring. The ejected cartridge leaves the lower part of the tube section 34 and is ejected by the ejection orifice 58, while the tube section 34 continues to pivot in the opposite direction of the clock The device can also be designed so that the cartridge to be ejected does not leave the section of tube 34 that when it has returned to its initial position, the position shown in FIG.

identical to that of fig 1.

  21 - When the actuation of the arming mechanism continues, the control disk 50 continuing to rotate, the cylinder head 4 pivots again in the clockwise direction of 901 with respect to the position of FIG. which brings the new cartridge 6 into the firing position. As soon as during the rotation of the control disk 50 the edge 56 releases the arm 84, the slide 80 returns from the position shown in FIG. 3 to that of FIG. 1, in which the ejection orifice 58 is plugged

by the sliding cover 86.

  In FIG. 4, the control disc 50, which is again outside the sectional plane of the drawing, is again shown in dashed form. FIG. 4 clearly shows that the arm 84 extends to the circumference of the control disk. 50 while the bend 82 is in the vicinity of the sectional plane of Fig 2 The ejection port 58 and the sliding cover 86 are located in the sectional plane of Fig 2 This cutting plane is indicated on the

fig 4 by the reference 100.

  The stops 68 and 72, interacting with the end 66 of the branch 64, are located with respect to the axis 36 at the end of the tube section 34 diametrically opposite the movable stop 30. The axis 36 is off-center by to the length of the pipe section 34 insofar as the portion of the tube section 34 above the axis 36 is

  longer than the part below.

  When the magazine 25 is empty or has been removed from the weapon, an ejector 96 switches to the occupied zone on

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22 -

  FIG. 1 by the last cartridge 6 and expels, when

  that the arming mechanism is actuated, the cartridge which is still in the chamber The different parts of the weapon, with the exception of the ejector 96, are then in the position shown in FIG. 96 penetrates during this ejection in the chamber 9 until its lower end reaches the lower end in FIG 2 of the chamber 9 Since the interior of the chamber 9 has no projection, the ejector 96 does not risk

to hang in the room.

  An axis 112 is housed in a bore 110 of the part 2,

  cf fig 5 The end of the axis 112, opposed to the obser-

  the carrier, carries a disk with pins interacting with the grooves of a Maltese cross provided on the mentioned side of the bolt 4 The drive of this disc, carrying pegs, by the pressure of the arms of the weapon and the driving of the bolt are performed in the same way as on the weapon described in document DE-A 28 13

  633 and in the corresponding US-A 4,348,941.

  This also applies to the drive of the feed mechanism 94 Unlike the known weapon, these different drives are provided on one side of the weapon. On the side facing the observer, the axis 112 carries a disc 116 integral with the axis In the same axis as the disc 116 is the disc 50 rotating about an axis housed in a fairing 120 of the weapon and can only be operated manually by the shooter in the opposite direction of the clock (FIG. 1) by means of a cocking button 122. The disk 50 is provided for this purpose on the 23 - face facing the disk 116. a leaf spring 124

  attached at one end to the disc 50, the end

  When the shooter rotates the cocking button 122 in the opposite direction of the clock in FIGS. 1 and 7, the end 125 of the leaf spring 124 bears on a protrusion 126 (FIG. 7) of the disk 116 and drives this disk When the shooter rotates the cocking button 122 in the opposite direction, the end 125 of the leaf spring 124 slides on the projection 126 without causing the

record 116.

  As shown in FIG. 7, a single-arm lever 152 is fixed on an axis 150 parallel to the axis 112, the lever

  being oriented upwards and coupled by an articula-

  At the other end of the conducting rod 154 there is an ejector 96 pivoting by means of a hinge 156. When the magazine still contains at least one cartridge, the cartridge holds the ejector 96 in a position , relative to the firing direction, behind the next cartridge to engage in the yoke 4 While the lever 152 is attached to the end of the axis 150 not visible to the observer in Fig 7, the lever 152 being integral with the axis, the other end of the axis 150, visible to the observer is provided with a lever arm 160, integral with the axis, the end has an oblong hole 164 in which comes is engagerune

  ankle 162 of a lever with two arms 1b 6.

  One of the lever arms of this two-armed lever 166 is

  delimited by the pin 162 and the hinge pin 168.

  The other lever arm 170 forms with the first an angle of about 1350. The free end of the lever arm 170 has on the non-visible side for the observer a pin 172 When a cartridge is in the magazine 25 , the lever mechanism 96, 154, 152, 160, 166 takes the position shown in Fig 7, the pin 172 of the lever arm 170 then being located near the periphery of the disk 116, without coming into contact with the disk If, on the other hand, the magazine 25 does not contain a cartridge, the lever mechanism 96, 154, 152, 160, 166, whose elements 152 and are integral with each other, rests via the pin 172 on the circumference of the disk 116 due to the force exerted by a tension spring 171 The pin 172 engages in a groove 173 of the disk 116 as a result of the force exerted by the tension spring 171 only when the disc 116 rotates slowly, as is the case when actuating man The curvilinear pattern of the groove 173 finally controls, via the pin 172 and the lever mechanism, the movement of the ejector 96 and takes, in a first step, the position of the cartridge. 6 shown in FIG. 7 The pivoting movement of the ejector 96 in

  the clock sense (fig 7) is obtained by the commitment

  of an extension 158 of the ejector 96 into the hole

  guide 159 "delimited by two blocks 159 and 159 '.

  When the rotational movement of the disc 116 continues and as long as the stud 172 is guided in the first part of the groove 173, the ejector 96 passes through the chamber 9, in the feed position. This has the effect of ejecting the cartridge The second part of the groove 173 has the effect of removing the ejector Their 96 from the chamber When the pin 172 leaves the groove 173, the lever mechanism returns to the initial position and the spring force 171 is exercising again, as

  mentioned above, on the edge of the disk 116.

  The automatic rotation of the disk 116 driven by the start of the stroke is performed at a high angular speed so that the pin 172 does not engage in the groove 173 due to the inertia of the two-armed lever

  166; this prevents the ejector 158 from automatically entering

  in action after firing the last cartridge

of the shop.

  The groove 173 constitutes a mechanical and therefore reliable drive of the ejector 96 in the two directions of actuation of the ejector. The outline of the groove 173, shown in FIG. 7, is formed by two successive curved segments. meeting the two segments at an obtuse angle constitutes the point of

  the groove 173 closest to the axis of the disk 116.

  FIG. 8 shows a side view of the duct or tube section 34, on which are also visible the

  stops 72, 68 and 78 of the tube section 34.

  FIG 9 shows the mounting of the tube section 34 on the pins 36 which cross from the outside two monobloc plates 180 connected to the parts 2 integral with the barrel and are housed in two pins 184 and 186 drilled with holes 182 to the size of the axes and located outside the

-y tube section 34.

  FIG 10 is a partial view of the pipe or tube section 34, a longitudinal section in major part, in a view corresponding to a rotation of 1800 by

relation to fig 1.

  The diameter of the cylinder head 4 is 49 mm.

  other dimensions refer to the sketch side.

  The weapon shown in FIGS. 11 to 14 differs from the example of execution described at the moment simply by the following characteristics: The control disc 50 No formed by a cam disc has been replaced by a gear wheel 250 Instead of being in contact with the slider, the toothed wheel 250 meshes with a toothed wheel 252 whose plane forms an angle of 900 with respect to that of the toothed wheel 250. The toothed wheel 252 opens or closes, according to its rotational position, the ejection orifice 258 which provides the same functions as

  the ejection orifice 58 of the first embodiment.

  In place of the pipe section 34, an evacuation element 234 has been provided which, like the pipe section 34, pivots and whose position is

  determined by a cam 282 located on the toothed wheel 252.

  The axis of rotation of the toothed wheel 250 coincides with the axis of rotation of the control disk 50, and in the view of FIG. 4 the toothed wheel 250 is at the same place as the control disk 50. The toothed wheel 250 also has in one place an elastic projection

  225 interacting with the projection 126 (Fig. 7).

  The toothed wheel 252 rotates about an axis 260 housed in a base 261 of the plastic fairing of the weapon. The toothed wheel 252 has an elongated hole 262 in an arc of a circle which extends at an equal distance from the rotation axis of the toothed wheel, at an angle slightly less than 1800 When the oblong hole 262 aligns with the ejection orifice 258, it releases the passage towards the outside of a cartridge to be ejected FIG. the toothed wheel 252 in the position where it is when the cocking mechanism is at rest, position in which the end of the oblong hole 262 closest to the gear wheel 250 is a little closer to the orifice of 252 that the other end of the slot 262 A near its axis, the toothed wheel 252 carries a concentric cam 282 having a wedge-shaped convex plane 283 and the upper end * of which is the end the farthest from the gear wheel 252, turns progress The horizontal plane 284 terminates in a vertical recess 285 which also delimits the assembly of the projection constituting the cam 282. The cam 282 is essentially situated on the side of the axis of the toothed wheel 252 opposite to that o is the hole

  oblong 262 Figure 13 shows the exact position.

  The cam 282 encounters on the stroke it describes when the actuation of the cocking button 122 (FIG 14) in the opposite direction of the clock in FIG 11 rotates the toothed wheel 252 also in the opposite direction of the clock in Fig. 13, a projection 288 of the element 234 In the position of the gear 252 shown in Fig. 13, the projection 288 is not in contact with the cam 282. In this case the element 234

  takes the position shown in fig 12.

  When the cocking button 122 is actuated, the parts being in the position shown in FIG. 13, the wedge-shaped plane 283 comes into contact with the lower face 294 of the projection 288 whose projection has been drawn in FIG. dotted, raises the projection 288 and thus rotates the element 234 in the clockwise direction in FIG. 11 At the same time, the actuation of the cocking button 122 causes the arming mechanism described in FIG. About

the first execution example.

  The stop 290 formed by an obtuse angle arm, provided on the element 234, is located when the arming mechanism is at rest, exactly in the race of a cartridge from the magazine and engaged in the chamber 9, nevertheless on the periphery of the cylindrical surface of the cylinder head 4 This stop 290 leaves during the pivoting

  of the element 234 in the sense of the clock the prolon-

  As soon as this has taken place and the element 234 has reached the position shown in FIG. 11, the arming mechanism begins to move the feed element 94 which has positioned in the meantime above the next cartridge to be loaded in the magazine, and begins to engage the cartridge, points down, in the chamber 9 The cartridge 6 engaged makes contact with the tip of

the cartridge 6 to eject.

  At the moment when the feeder 94 begins to engage the next cartridge in the chamber 9, the position of the gear 252 is such that the oblong hole 262 clears

  completely the ejection port 258 When the rotation

  When the arming button continues, the feeder 94 continues to engage the cartridge to be loaded into the chamber 9 and the gearwheel 252 also continues to

  turn The ejection port 258 is always open.

  As soon as the element 234 has taken the position indicated on the S fig 11, the lower face of the projection 288 comes into contact with the horizontal plane 284 of the cam 282 and the

  position of element 234 remains unchanged.

  Just before the cartridge engaged in the chamber is fully inserted, the vertical plane 285 of the projection 288 contacts the forwardly inclined portion and the top 296 of the underside of the projection 288, and a spring branches 297 bearing on the element 234 now tends to rotate the element 234 in the opposite direction of the clock in FIG. 11 This rotational movement is first hindered when the edge 298 of the projection 290 between in contact with the right lateral face, in FIG. 11, of the cartridge 6 being ejected. Since the cam 282 continues to rotate with the toothed wheel 252, the

protrusion 288 no longer has support.

  As soon as the end face, slightly rounded and facing upwards, of the cartridge 6 which is being ejected reaches the edge 298, the advance 290 is inserted under the pressure of the mainspring 297, by the edge 298 in the free space between the ejected cartridge and the new cartridge engaged, and thus prevents the new cartridge engaged from escaping from the bottom of the chamber 9 The cartridge to be ejected has completely left the chamber 9 and is expelled from the weapon from below through the still open ejection orifice 258. The ejection movement - is accompanied by the arm 290, a surface 300 of which is oblique with respect to the longitudinal axis of the chamber 9. in contact with the cartridge which rests on a surface 302 of the part 2 integral with the barrel At this moment the cam 282 has completely left the region of the projection 288 so that the element 234 rebascles under the pressure of the mainspring 297 in the position represented Fig. 12 The slot 262 begins to move out of the area of the ejection port 258 shortly after the cam 282 has completely left the area of the projection 288. complete turn, the gear 252 has returned to the position shown in Fig 13 in which the ejection port 258 is closed Meanwhile, the yoke 4 has also rotated in the clockwise direction of 900 relative to the position of Fig 11, so that the cartridge that has just been loaded is in

shooting position.

  As long as the weapon described on the basis of FIGS. 11 to 14 performs the loading operations automatically, the element 234 is in the position shown in FIG. 12 and a stop 308 is exactly in the stroke of the tip of the projectile. 7 of the cartridge 6 engaged by the feeder 94 in the chamber 9 in

  feed position This allows instant stop

  but with care, however, the movement of engagement of the cartridge which is carried out at very high speed (the weapon must be designed for a rate of fire of at least 2,000 rounds per minute) The arm 290 being folded under a obtuse angle, it is possible that this arm is very slightly elastic and that consequently the

  braking is done with even more care.

* 31 - In the position shown in Fig 12, the element 234 is supported by a surface 312 facing upwards on a horizontal surface 314, facing downwards,

of the piece 2 secured to the barrel.

  The lower face 320 of the gear 252 is in contact when the ejection port 258 is closed, with a lining 322 made of a substantially tubular piece of soft plastic. This prevents penetration.

  of impurities and moisture In order to remove the

  322 during manual arming, the area of the lower face 320 which is above the lining 322 when the arming mechanism is not actuated, is at a lower level than the others areas of the underside of the gear wheel 252 so that the latter do not come into contact with

the trim 322.

  The teeth of the gears 250 and 252 have essentially

  The different teeth are delimited on their outer surface by a

  cylindrical surface coaxial with the axis of the

  Toothed wheels 250 and 252 The width of the teeth is a multiple of their height Since the gears 250 and 252 create a mechanical coupling between the cocking button 122 and the toothed wheel 252 which serves at the same time as a shutter member. the hole

  ejection 258, this device is very quiet.

  In the examples of execution described, the ejection of a

  cartridge not fired is carried out by means of the

  When the store is at least partially

  When the magazine is empty, the ejection is effected by means of the ejector 96. In the examples of execution, the actuation of the cocking button 122 controls the opening of the ejection orifice for This is also valid when the unarmed weapon is loaded for the first time, although in this case there is no cartridge.

ejec Ler.

Claims (8)

claims   1 Automatic firearm for cartridges without a flare preferably a rifle, provided in a piece (2) integral with the barrel of a cutout (3) rectangle with respect to the axis of the barrel, in which a cylinder head (4) for the cylindrical main body is arranged coaxially and rotates about its longitudinal axis for feeding, the cylinder head having a chamber (9) aligned with the barrel when the cylinder head is in the firing position, and provided with a mechanism for tilting the breech from the firing position to the feed position, the chamber (9) being designed so that a cartridge can be engaged by either end, with a manual arming mechanism which ejects when arming the cartridge located in the chamber by the opposite side to that by which the new cartridge is introduced, characterized in that there is provided a movable stop (30, 308) coupled to an arming mechanism, this stop was found nt, when the arming mechanism is not actuated and that the yoke (4) is in the feeding position, in front of the end of the chamber (9) opposite to that by which a new   cartridge (6) is introduced, at the level of the   front (15) of the cartridge (6) fully engaged in the chamber (9), and releasable from the mentioned end of the chamber by means of the arming mechanism.   2 weapon according to claim 1, characterized in that the movable stop (30, 308) is arranged and shaped so as to be at least at the point (10) of the projectile of the cartridge (6) fully engaged.   Weapon according to one of claims 1 or 2,   characterized in that the shape of the chamber (9) allows a cartridge (6) to pass through it completely.   4 Weapon according to any one of the claims   previous, characterized in that at least one diameter of the section of the recess (44) of the piece (2) integral with the barrel in which is housed the end of the barrel (1) side breech, is lower   to the corresponding diameter of the cartridge (6).   Weapon according to any one of the claims   preceding, characterized in that the movable stop (30, 308) is pivotally mounted.   Weapon according to any one of the claims   preceding, provided with an ejection duct through which the cartridge is expelled, characterized in that the ejection channel (34, 234) is movable and constitutes the   stop (30, 308) when the weapon mechanism   ment is not actuated and that it aligns with the chamber in the ejection position when the   arming mechanism is actuated.   Weapon according to any one of the claims   preceding, characterized in that there is provided a rotary control disc (50), in operative junction with the cocking mechanism, which has sectors of different outer radius and a bevel (57) comes into contact during the rotating with an arm (84) of a slide (80) with a return spring, which it moves, and a spring lever (branch 64) engaged with a piece (68, 72) secured to the movable stop (30) and pivoting under the action of the movements of the slider (80) so as to control the movable stop (30).   Weapon according to any one of the claims   preceding, characterized in that it has been provided that an ejection port (58, 258) of the weapon can be closed by a closure mechanism (50, 80, 86, 250, 252) coupled to the mechanism of arming and only opens when the arming mechanism is actuated.   9 weapon according to any of the claims of 1   at 6, characterized in that a rotating disk (toothed wheel 250) has been provided, in operative junction with the cocking mechanism and mechanically coupled to another rotary disk (toothed wheel 252), and that this other disk is mounted in front of an ejection port (258) of the weapon and has a cutout (slot 262) which releases the ejection orifice (258) in predetermined positions of the other disk (252) which is also provided with a control cam (282) which, upon rotation of this other disc, comes into contact with a movable member (234) bearing the stop mobile (308) and operates it.   O.Arm according to any one of the claims   preceding, characterized in that there is provided a spacing between the end of the barrel (42) and the end facing the barrel of a cartridge (6) in firing position.