EP0038751B1 - Compteur de coups pour armes à feu automatiques - Google Patents

Compteur de coups pour armes à feu automatiques Download PDF

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Publication number
EP0038751B1
EP0038751B1 EP19810400610 EP81400610A EP0038751B1 EP 0038751 B1 EP0038751 B1 EP 0038751B1 EP 19810400610 EP19810400610 EP 19810400610 EP 81400610 A EP81400610 A EP 81400610A EP 0038751 B1 EP0038751 B1 EP 0038751B1
Authority
EP
European Patent Office
Prior art keywords
pawl
bearing
tooth
advance
spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19810400610
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0038751A1 (fr
Inventor
Allain André Georges Coubes
René Edouard Marie Pons
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Direction General de lArmement DGA
Original Assignee
Delegation Generale pour lArmement
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Delegation Generale pour lArmement filed Critical Delegation Generale pour lArmement
Publication of EP0038751A1 publication Critical patent/EP0038751A1/fr
Application granted granted Critical
Publication of EP0038751B1 publication Critical patent/EP0038751B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A19/00—Firing or trigger mechanisms; Cocking mechanisms
    • F41A19/01—Counting means indicating the number of shots fired
    • F41A19/02—Burst limiters

Definitions

  • the technical sector of the present invention is that of shot counters, or burst limiters, for automatic firearms, in particular portable firearms, of the hammer-actuated type.
  • the advance of the notched piece is controlled by. an advance pawl, which is driven by one of the parts set in motion by the recoil of the mobile assembly.
  • a retaining pawl keeps the notched part in place while the advance pawl returns to engage in a next notch after the start of one of the bursts.
  • a spring tends to return the notched part to its initial position. This spring acts when the pawls are erased by a trigger, controlled by releasing the trigger. The system is then in the state to resume a new counting cycle.
  • the advance and retaining pawls are constantly maintained in contact with the notched part by respective springs whose force must be limited. These springs are determined in a precise manner so that they do not oppose too energetically to that, antagonist, which controls both the return of the trigger and the erasure of the pawls. They must keep the pawls in place against the inertial forces induced by the shot.
  • the invention proposes to overcome the aforementioned drawback of untimely detachment of the advance pawl during the precise duration of the disturbing shock and thus to increase the counting reliability of a system as described above, by improving the stability of the path of the pawl in advance in the engagement control.
  • the subject of the invention is a shot counter device for automatic, in particular portable firearms, device of the type comprising a notched part, for example a ratchet wheel, the advance of a tooth of which is obtained by an advance pawl driven, against a return means, by a part set in motion by the recoil of the mobile assembly, characterized in that it comprises means capable of exerting a force supplementing the force of supporting the advance pawl against a tooth of the notched part during the engagement, in order to perfect the maintenance of the pawl during the attack phase of this tooth.
  • a notched part for example a ratchet wheel
  • the means for perfecting the retention of the pawl against the tooth consist of an additional spring secured to the detent box, cooperating with a bearing face provided on the pawl.
  • This bearing face of the spring results from the adaptation of the profile of the advance pawl and, preferably, is plane.
  • the aforementioned means are constituted by an additional branch of the spring bearing, during the tooth attack phase by the pawl, on a stop secured to the underside of the expansion box.
  • the untimely detachment of the advance pawl is avoided on the one hand by the addition of a force complementary to that of the return means serving to maintain contact between the advance pawl and the notched part, and on the other hand by the action of this additional force on the pawl, which, limited to the phase strictly useful in advance of the notched part, is such that it does not disturb the control action of the detent.
  • the device shown in fig.1 and 2 includes a burst limiter which allows a limited number of shots to be fired.
  • This stroke counter comprises a ratchet wheel 1 mounted on a hub 2 rotating on an axis 3 bearing on the side walls of the expansion box 4.
  • the wheel ratchet is held in the rest position by a not shown return means resting on the trigger box, and tending to rotate it clockwise and to keep it engaged with the advance pawl 5.
  • the advance pawl consists of a part 5 located below the ratchet wheel and articulated on a lever 6 which, at its end, cooperates in abutment with a rod 7 transmitting the arming movements of the striker hammer (not shown), so that, each time the hammer is cocked, this rod comes into engagement with the lever 6, so that the pawl 5 is engaged with the ratchet wheel 1 to rotate it by a tooth counterclockwise , with the combined action of the support spring 8.
  • the advance pawl 5 returns under the action of the torsion return spring, which bears on the rear wall of the expansion box, the ratchet wheel is held in place by a retaining pawl 10, the retention of which is facilitated on this wheel by a spring.
  • the action of the pawls 5 and 10 can be neutralized using a clicker 11 via the projections 12 from the operation of the trigger (not shown).
  • the stability of the path of engagement of the advance pawl 5 on the ratchet wheel 1 is improved by the addition of an additional spring 13, fixed to the bottom wall 14 of the expansion box.
  • This spring is for example torsional. It cooperates with a suitable profile of the advance pawl so as to act on this pawl only on a track 15 thereof, in addition to the action of the support spring 8, in particular when the parts occupy the positions shown in fig. 1, that is to say during the attack phase or taking the tooth by the advance pawl, which corresponds to the beginning of the opening of the mobile assembly or at the start of the stroke.
  • the additional spring 13 comes to bear on the straight track 15 formed on the underside of the advance pawl.
  • Fig. 2 shows the positions of the constituent parts of the burst limiter according to the invention when the burst is interrupted.
  • the additional spring 13 no longer bears on the advance pawl due to the sufficient clearance of the latter and its suitable profile. The action of the additional spring 13 therefore does not interfere with the action of the trigger 11, 12 in the phase of erasing the advance and retaining pawls.
  • Fig. 3 shows another embodiment of an improved hit counter device according to the invention.
  • the additional pressing force of the advance pawl 5 on the ratchet wheel 1 during the tooth attack phase is obtained by an additional branch 8a of the pawl support spring 8.
  • This branch 8a is supported on a stop 16, for example attached to the underside of the expansion box, on a useful range 16a, preferably rectilinear, of this stop, judiciously determined to limit the support of the branch to the tooth picking phase by the advance pawl.
  • the present invention also covers other alternative embodiments of means capable of exerting a force supplementing the bearing force of the advance pawl against a tooth of the notched part during the engagement, as technically equivalent means consisting of cams or elastic stops cooperating with a suitable profile of the advance pawl.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Transmission Devices (AREA)
EP19810400610 1980-04-21 1981-04-16 Compteur de coups pour armes à feu automatiques Expired EP0038751B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8008850A FR2480930A1 (fr) 1980-04-21 1980-04-21 Compteur de coups pour armes a feu automatiques
FR8008850 1980-04-21

Publications (2)

Publication Number Publication Date
EP0038751A1 EP0038751A1 (fr) 1981-10-28
EP0038751B1 true EP0038751B1 (fr) 1984-02-15

Family

ID=9241131

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810400610 Expired EP0038751B1 (fr) 1980-04-21 1981-04-16 Compteur de coups pour armes à feu automatiques

Country Status (3)

Country Link
EP (1) EP0038751B1 (OSRAM)
DE (1) DE3162236D1 (OSRAM)
FR (1) FR2480930A1 (OSRAM)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0184581B1 (de) * 1984-12-05 1989-01-18 STEYR-DAIMLER-PUCH Aktiengesellschaft Abzugsvorrichtung für automatische Handfeuerwaffen
EP0203034B1 (fr) * 1985-03-22 1990-05-30 FABBRICA D'ARMI P.BERETTA S.p.A. Dispositif de contrôle du tir par rafales pour armes automatiques

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3216265A (en) * 1963-10-18 1965-11-09 Clary Corp Intermittent drive mechanism
US3501968A (en) * 1967-10-18 1970-03-24 Bliss Co Drive mechanism
FR2146710A5 (OSRAM) * 1971-07-20 1973-03-02 Heckler & Koch Gmbh

Also Published As

Publication number Publication date
EP0038751A1 (fr) 1981-10-28
DE3162236D1 (en) 1984-03-22
FR2480930B1 (OSRAM) 1983-09-30
FR2480930A1 (fr) 1981-10-23

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