FR2520497A1 - MECHANICAL FIRE DEVICE FOR FIREARMS - Google Patents

Abstract

MECHANICAL FIRE DEVICE FOR FIREARMS COMPRISING A FIXED BARREL AND A MULTIPLE DRUM-SHAPED FIRE CHAMBER. IT INCLUDES A MOBILE SLIDER LONGITUDINALLY PARALLEL TO THE AXIS OF THE BARREL, IN DYNAMIC LINKAGE WITH A SPRING, ACTING ON A PUNCHER BY THE INTERMEDIATE OF A LEVER AND MAINTAINED IN ITS INITIAL POSITION BY MECHANICAL MEANS. THE SLIDER 1 INCLUDES A PART 3 ON WHICH IS FORMED A CONTROL CAM 4 ALONG WHICH SLIDE ROLLERS 5, PLACED AT THE PERIPHERY OF A DRUM 2 AT REGULAR INTERVALS WHEN THE DRUM 2 TURNS, SO THAT THE SLIDER 1 CAN MOVE AGAINST THE PRESSURE OF A PERCUSSION SPRING 15 AND IS MAINTAINED IN ITS INITIAL POSITION BY AT LEAST ONE RELEASE RATCHET SUBJECT TO THE ACTION OF A SPRING, CONNECTED TO THE RELEASE DEVICE, WHILE THE REAR END OF THE SLIDE 1 IS ARTICULATED TO AN ARM 8 OF A LEVER WITH TWO ARMS 6 OF WHICH THE SECOND ARM 10 RETAINS THE PUNCH 11 BY CONCORDANCE OF SHAPE.

Description

Mechanical firing device for firearms.

  The present invention relates to a starter device

  mechanical firing hole for firearms, in particular for automatic firearms and high power automatic cannons, comprising a fixed barrel and a multiple firing chamber in the shape of a drum, as well as a slide movable longitudinally, parallel to the axis of the barrel in dynamic connection with a spring, acting on a striker by means of a lever and held in its position

  initial by mechanical means.

  Firearms are often currently equipped with an electric firing device in which the firing takes place via a point in contact with the primer which transmits the electrical voltage to the primer by

  different contacts The primer is thus initiated outside the shot.

  We often also choose the transmission of a current to

  place of voltage transmission.

  Increasingly frequent radiation by radio and radar waves from aerodromes and ships is increasing

  the risk of spontaneous ignition of electric firing elements

  The elements of the electric firing device which are the seat of a current or a voltage can be subjected to foreign influences and cause untimely firing.

  of a weapon thus conceived It is therefore appropriate and even in part

  tie necessary to fire ammunition with mechanical firing

  from weapons of the aforementioned type.

  A mechanical firing device for handguns

  fire is described in German patent 24 60 391 When

  triggering of the shot by the trigger, a slide is guided parallel-

  parallel to the axis of the barrel by the force of a spring prestressed against a lever which acts itself on the striker and displaces it against an elastic force The striker thus initiates the propellant charge The initial position of the striker is reached

  by the return spring, while the slide is stressed

  cited by the gas pressure and returns to get stuck, In the terminal position, the slider is retained by supply rods which are immobilized, due to a switch position of a cane curve in

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  form of a loop, by a pin moving in slides

res rectilinear.

  The disadvantage of this described solution is that the striker is under the dependence of the spring, because the intense acceleration forces, for example when firing in continuous fire, cannot be absorbed by the spring, from a point Another functional disadvantage of the object of the allement patent 24 60 391 is that the guide of the slide is produced by gas pressure, because there can be delays and pressure differences

  resulting in false operations or disruption of operation

  operation. Consequently, the subject of the invention is, in the case of a firing device of the type described above, a simple structure which can be produced at low cost, guaranteeing operational safety even in continuous fire and avoiding involuntary departures under the influence of foreign influences. To achieve this objective, according to the invention, the slide comprises a control part on which is formed a control cam along which slide

  rollers placed at the periphery of the drum at angular intervals

  regular laires when the drum rotates, so that the slide can move in a straight line in the direction of the barrel against the pressure of a striker spring and is held in its initial position by at least one detent pawl subjected to spring action, connected to the device

  trigger, while the posterior end of the neck

  lisseau is articulated to one arm of a lever with two arms of which

  the second arm retains the striker by matching shape.

  It is advantageous in this mechanical starting device according to the invention that the rotary movement of the drum is transformed into a rectilinear movement of the slide which ultimately controls the striker. The firing position therefore always depends on the position of the slide. of the concordance of form between the lever with two arms and the striker an adjustment exactly synchronized of the striker by the rotation of the drum It cannot occur spontaneous ignition of any type with the device according

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  The invention The moment of firing is fixed exactly by the maneuvering processes specific to the weapon.

  and the triggering of the striker are therefore necessarily determined

  born by the proper movement of the weapon The movements of the

  cutter during arming and triggering are very reduced The mass of the striker is easy to vary The drive link between the rollers of the drum and the control part brings the striker back to the ready position only by a slight rotation of the drum The the striker tip is therefore forced out of the cartridge zone which follows in each case and is therefore protected against damage. The low masses and short journeys of the moving parts guarantee the high rate of fire in total. firing device

mechanical.

  According to a variant of the invention, the angular detent pawl can leave by pivoting under

  the action of a longitudinally parallel movable fire rod

  the axis of the barrel against the pressure of a spring

  reminder of the slide notches, the firing rod being controlled

  linked by a mechanical or electrical firing trigger in

  function of the weapon's own movement.

  The detent pawl can also be controlled according to the invention by kinematically connecting the slide to a detent pawl with two lever arms penetrating into notches or notches, the arms of which can be driven

  hydraulically pivoted by means of pistons

  alternating goalscorer, shooting triggering movements

  of the piston depending on the proper movement of the weapon being com-

  electrically or mechanically controlled.

  With the simple means described, the firearm can be equipped with both a purely mechanical device and a hydro-mechanical device for driving the slide.

to move the striker.

  So that the movement of the striker takes place with perfect synchronism and operation, according to another

  embodiment of the invention, one can train on the percussion

  two diametrically opposed surfaces on which is

  the forked end of the lever arm.

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  It is also possible to provide in the drum housing, coaxially with respect to the bottom carrying the cartridges, a

  compensation disc intended to limit the path of the percussion

  tor in the firing direction The advance of the striker towards the cartridge is therefore identical to each shot. In addition, the control part may include a control cam having an upward and downward gradient on which the drum rollers slide, and the control cam may be shorter than the arc length between two neighboring drum rolls. There is shown in the appended drawing an exemplary non-limiting embodiment of the invention:

  FIG. 1 shows, in partial section, the device

  positive firing according to the invention on a firearm; Figure 2 is a top view of the gun drum, where the control part is visible; Figure 3 is a top view of the two-arm lever with the striker, in the direction of arrow III of Figure 1;

  Figure 4 is a section of the drum with the coulis-

  bucket along line IV-IV of Figure 1; 5 shows in partial section a detent pawl with two lever arms actuated by a piston and the

slide.

  The mechanical firing device includes a

  slide 1 which is arranged parallel to the longitudinal axis

  nal of the barrel outside of the drum 2 so that it can

  move longitudinally A control piece 3 is solid

  daire of the slide; it has a control cam 4 provided with a bevel on both sides, which allows the drum 2 to operate both left and right at no additional cost. When the drum 2 rotates, drum rollers 5 slide on the control cam 4 and

  move the control part 3 at the same time as the slide

  integral bucket 1 in the direction of the barrel, when the drum roll 5 is at the top of the control cam 4 and passes The slide 1 is articulated at the rear end of the weapon to a lever with two arms 6 which can pivot around the axis of the articulation 7 The connection of the two-arm lever 6 with the slide 1 is carried out by means of the arm

  upper lever 8 and hinge pin 9 inserted.

  The lower lever arm 10 is forked and embraces the striker 11 on its two diametrically opposite surfaces 12. The striker tip 13 penetrates through a compensating disc 14 which is in contact with the bottom

ammunition pellet.

  At the front end situated on the side of the barrel, the slide 1 houses a percussion spring 15 which rests on a stop 16 located on the weapon. In addition, a notch 17 is formed in the upper part of the end; a lever arm 19 of an angularly shaped detent pawl 18 enters into the cocking position The second lever arm 20 of the detent pawl 18 is subjected to the pressure of a return spring 21 which rests on it - even on a bearing 22 fixed to the weapon The second lever arm 20 is further attacked, against the elastic force of the return spring 21, by a movable firing rod 23 parallel to the axis

  longitudinal of the barrel, which is controlled by the trigger

  ment of electric or mechanical shooting according to the movement

clean of the gun.

  The triggering of the shot, which can be electric

  or mechanical, causes the drum 2 to perform a short rotational movement of, for example 720, when there are five drum rollers 5 At each revolution of the drum 2, a roller 5 guides through the control cam

  4 of the control panel 3 the slider 1 in the direction

  firing, against the action of the percussion spring 15.

  When the drum has finished rotating, the part

  Mande 3 is each time in the middle between two of the rollers 5 arranged at regular angular intervals at the periphery of the drum When the slider 1 moves in the firing direction, the lever arm 19 of the angular detent pawl 18 penetrates, with the help of

  return spring 21, in the notch 17 of the slide 1.

  With the movement of the slide 1, the arm 8 of the lever to two

  arm 6 is controlled by the hinge pin 9 by the inter-

  median of the axis 7 of the joint When the lever arm 8 rotates, the striker 11 moves in the opposite direction to that of firing under the action of the lower arm 10 of the lever with two arms and is under dependence on

  lever with two arms 6 by shape match Le trigger-

  of the firing process may be due to the elements

  of maneuver not shown of the firearm, hydro-

  electric, purely hydraulic or mechanical, by means of the recoil mechanism Thus, the detent pawl 18, is via the firing rod 23, triggered at

  a moment corresponding precisely to the movement of the weapon.

  After triggering of the detent pawl 18, the slider 1 is accelerated at the same time as the lever with two arms 6 and the striker 11 by the percussion spring 15 and the striker 11 initiates the primer After firing, the weapon fire is again moved by means of gas pressure,

  so that the described process is repeated.

  The mechanical firing device indicated

  is fixed to the boltier 24 of the drum The drum booter itself

  even is placed so that it can retreat from the

case 25 of the weapon.

  The compensating disc 14 limits the path of the striker 11 in the firing direction by contact with the bottom of the base of the ammunition The advance of the striker

  towards the ammunition is thus equal to each shot.

  Instead of the firing rod 23 with the detent pawl 18, the movement of the slider can also, within the framework of the invention, be triggered by a pawl of

  trigger with two lever arms 26 which is kinematically connected

  hydraulically moving pistons 27 The detent pawl 26 has two lever arms 28

  and 29 each of which can be moved by a piston 27.

  The movements of the pistons in the distributor 30 always take place alternately, so that the lever arms 28 and are also alternately under pressure In the position shown in FIG. 5, the slider 1 is in the firing position To arm the striker 11, the slide 1 is moved by the rollers 5 in dynamic connection with the control part 3 relative to the barrel At the same time, the left piston 27 is subjected to hydraulic pressure,

  while the right piston 27 rests in the di tri-

  striker 30 without being subjected to pressure The lever arm

  28 penetrates by its stop edge 31 into the notch 32 of the coulis-

  bucket 1 This notching position in which the percu-

  tor 11 is armed is supported by the return spring 33. When the firing is triggered, the left piston 27 is pressurized, while the right piston is released from the pressure This raises the lever arm 29, leave

  at the stop edge 31 of the notching position in the

strip 1.

Claims (5)

  1 Mechanical firing device for   firearms, especially for automatic firearms and barrels   ques of great power, comprising a fixed barrel and a multiple firing chamber in the shape of a drum, as well as a slide movable longitudinally parallel to the axis of the barrel, in dynamic connection with a spring, acting on a striker by the '' through a lever and   maintained in its original position by mechanical means   ques, characterized in that the slide (1) comprises a control piece (3) on which is formed a control cam (4) along which rollers roll   drum (5) placed at the periphery of the drum (2) inter-   uniform angular valleys when the drum (2) rotates, so that the slide (1) can move in a straight line in the direction of the barrel against the pressure of a percussion spring (15) and is held in its initial position by at least one detent pawl (18, 26) submitted   to the action of a spring, connected to the triggering device-   ment, while the rear end of the slide (1) is articulated to an arm '(8) of a two-arm lever (6) whose second arm (10) retains the striker (11) by concordance of form.   2 mechanical firing device for firearms according to claim 1, characterized in that the angular trigger pawl (18) can leave by pivoting notches (17) of the slide (1) under the action of a rod firing (23) movable longitudinally parallel to the axis of the barrel, against the pressure of a return spring (21), the firing rod (23) being controlled by a triggering of   mechanical shot according to the proper movement of the weapon.   3 Mechanical firing device for firearms according to claim 1, characterized in that the slide (1) is kinematically connected to a pawl of   trigger with two lever arms (26) penetrating into   notches (32), whose lever arms (28, 29) can pivot   hydraulically ter by alternating pistons (27) of a distributor block (30), the pistol firing trigger movements depending on the movement   weapon clean being electrically or mechanically controlled only.   4 Firing device according to the claim   tion 1, characterized in that two diametrically opposed surfaces (12) are formed on the striker (11), surfaces on which the forked end of the lever (10).   Mechanical firing device for   firearms according to all of claims and 4,   characterized in that it comprises in the drum case   bour (24), coaxially with respect to the bottom carrying the ammunition, a compensation disc (14) intended to limit   the path of the striker in the firing direction.   6 Mechanical firing device for ar-   meshes according to claim 1, characterized in that the control piece (3) comprises a control cam (4) provided with bevels arranged on both sides in the direction of rotation, on which the drum rollers (5) slide and in that the control cam (4) is shorter than the   arc length between two drum rollers (5).