US3440925A - Automatic firearm with burst control means - Google Patents

Automatic firearm with burst control means Download PDF

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Publication number
US3440925A
US3440925A US731491A US3440925DA US3440925A US 3440925 A US3440925 A US 3440925A US 731491 A US731491 A US 731491A US 3440925D A US3440925D A US 3440925DA US 3440925 A US3440925 A US 3440925A
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US
United States
Prior art keywords
rocking lever
hammer
catch
lug
firearm
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 - Lifetime
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US731491A
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English (en)
Inventor
Ernest Henri Vervier
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.)
FN Herstal SA
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FN Herstal SA
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Filing date
Publication date
Application filed by FN Herstal SA filed Critical FN Herstal SA
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Expired - Lifetime 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 fire-control camshaft pivots a first rocking lever into a position in which teeth on the forward end of the first rocking lever cooperate with a tilting finger on the hammer and the rear end of the first rocking lever and a second rocking lever engage a lug on a catch for the hamrner to move the lug out of engagement with the hammer until the tilting finger on the hammer releases the teeth on the forward end of the first rocking lever, allowing the rear ends of the first rocking lever and the second rocking lever to pivot under spring action to the starting position thus releasing the lug for engagement with the ham- THEY.
  • the invention relates to an automatic firearm, comprising a pivoting hammer having an extension with stops engaging, in the armed position, in hooks provided on pivoting catches and a device making it possible to limit the maximum number of shots fired with each burst.
  • an automatic firearm can be fired without interruption as long as the user depresses the trigger, until exhaustion of the magazine.
  • the firing is interrupted only when the trigger is released or when the feed is interrupted.
  • firearms have already been desinged which are fitted with devices for controlling the number of shots which may be fired by exerting a continuous pressure on the trigger.
  • these control devices are permanently fitted into the fire arm, and consequently must be provided during assembly of the firearms concerned.
  • the object of the present invention is to remedy these disadvantages and relates to an automatic firearm with a burst control means, which is characterised therein, that the device for limiting the maximum number of shots fired with each burst comprises a first rocking lever which, by means of an arm pivoting under the action of a firecontrol camshaft, is brought into an operative position in which, during firing, its forward extremity cooperates with a finger which tilts said first rocking lever against the action of a return spring, while its rear end engages a lug on a catch which is thus moved away from the stop of the hammer and which thereafter pushes a lower shoulder of a second rocking lever, causing it to pivot in turn, so that the rear end is in turn brought into contact with said lug in order to prevent contact between said catch and the stop of the hammer until the aforesaid lug releases the forward extremity of said first rocking lever which then returns into its starting position under the action of the spring and simultaneously pushes back the second rocking lever into its starting position as
  • the first rocking lever, the second rocking lever, the pivot arm and the return spring of the first rocking lever are mounted into a removable casing lodged into the trigger-housing and having the form of an inverted U, one arm of which is provided with a fork at the front and with an aperture at the rear for allowing passage to the fire-control camshaft.
  • the pivot arm has a tail subjected to the pressure of a protrusion of the firing lever and two pawls terminating in hooks, one of which engages underneath the first rocking lever having at the front end teeth meshing with the finger of the hammer and at the rear projections engaging with the lug of the catch, whilst the other bears on the second rocking level which also has projections at the rear.
  • FIG. 1 is a schematical side elevation of the limiting device lodged into the trigger'guard
  • FIG. 2 is an exploded view of the removable casing and of the parts contained therein.
  • the firearm concerned is an automatic rifle, fragmentarily illustrated, comprising in a known manner a triggerguard 1, on the lowcr portion of which is located a trig ger 2 mounted pivotably on an axle 3 against the action of a return spring 4. On this same axle 3 there Pivot further a forward catch 5 and a rear catch 6, provided with hooks 5a, 6a respectively, capable of engaging corresponding stops 9a, 9b of projection of the hammer 9 ivoting about the axle 10, because a spring 7 between said catches tends to tilt them to move their hooks 5n and 6a towards each other.
  • a fire-control camshaft 8, operated by an actuating button, here not visible, on a lateral face of the trigger housing, can be brought into a position determining the mode of firing, i.e. in addition to acting as a safety catch, it allows the weapon to be fired in single shots or in unlimited bursts as in a known firearm.
  • the control camshaft 8 also regulates the firing in controlled burst by acting on the device according to the invention, provided for limiting the maximum number of shots fired in each controlled burst.
  • This device comprises in the trigger-housing a casing 11 having the general shape of an inverted U with a long arm 12 and a small arm 13.
  • the long arm 12 has a fork 12a located on the axle 10 of the hammer 9, and at the rear an aperture 12b in which passes the fire control camshaft 8, so that the casing is held in position.
  • an axle 14 on which are mounted side by side a first rocking lever 15, a second rocking lever 16 and a pivot arm 17.
  • This pivot arm comprises a tail 17a whose extremity 17b can bear against the bottom of the trigger housing for limiting its movement, and further two pawls 17c and 17d, one extending forwards and in downward direction. the other rcarwards and in upward direction.
  • the pawl 17c terminates in a hook 172 engaging underneath the forward end of the first lever 15.
  • the pawl 17d terminates in a hook 17!: adapted to bear on a shoulder 16a located on the upper rear face of the second rocking lever 16 which also has a lower shoulder 16b located underneath the lower rear portion of the first rocking lever 15.
  • the first rocking lever has three teeth 15a, 15b and 156.
  • the hammer 9 After the firing of the third shot, the hammer 9 returns towards the rear and its finger 19 disengages from the tooth 150, so that the first rocking lever 15 which has just been freed pivots under the action of its return spring 18 in counter-clockwise direction. Due to this pivoting, the rear upper portion of rocking lever 15 pushes upwards the shoulder 16a of the second rocking lever 16, which thereby pivots in the same direction as the rocking lever 15. In this manner, the rear segment 16c leaves the lug 6b and, under the action of the spring 7, the catch 6 returns in forward direction, so that its hook is again in the engaging position with the catch 9b of the hammer. Although the trigger 2 has not been released, the firing is thus automatically interrupted after the third shot.
  • the release of the trigger 2 causes the catch to pivot rearwards and its lug 6b disengages from the projections of the first rocking lever 15, and the latter, under the action of its return spring 18, pivots in counter-clockwise direction to return into its starting position, so that the weapon is again ready to fire a burst of three shots.
  • the disclosed device could be adapted to fire a burst made up of a different number of shots, for example two, four or five.
  • An automatic firearm having a trigger housing, a trigger, a pivoting hammer, an extension on said hammer, stops on said extension, two pivoting catches, books on said pivoting catches engaging with said stops in the armed position, by trigger action, a device for limiting the maximum number of shots fired with each burst, said device comprising a first rocking lever, 21 return spring acting on said first rocking lever, a pivoting arm and a fire-control camshaft which acts on said pivoting arm which in turn brings said first rocking lever into an operative position during firing, a finger controlled by said pivoting hammer and cooperating with the forward extremity of said first rocking lever which tilts against the action of said return spring, a lug on one of said two pivoting catches, the rear end of said first rocking lever engaging by said tilting said lug on said one catch which is thus moved away from one stop on said extension of said hammer, a second rocking lever, 21 lower shoulder on said second rocking lever which is pivoted in turn due to pushing action of
  • a firearm according to claim 1 characterised in that said first rocking lever, said second rocking lever, said pivot arm and said return of said first rocking lever are mounted into a removable casing lodged into said trigger housing.
  • a firearm according to claim 2 characterised in that said first rocking lever, said second rocking lever and said pivot arm are pivotably mounted on a common axle carried by said removable casing.
  • a firearm according to claim 4 characterised in that one of said arms of said casing has at the front a fork bearing on the axle of the hammer and at the rear an aperture for passage of the fire control camshaft, which holds said casing in position.
  • a firearm according to claim 1 characterised in that said first rocking lever has teeth at its forward portion, with which the finger carried by the hammer meshes successively, and in that the first rocking lever and the second rocking lever have projections on their respective rear portions which successively come into engagement with the lug of the catch.
  • a firearm according to claim 1 characterised in that the finger carried by the hammer is pivotably mounted on the hub of the hammer and is subjected to the action of a spring.
  • a firearm according to claim 1 characterised in that said return spring of the first rocking lever has the form References Cited UNITED STATES PATENTS 11/1961 Silsby 89-129 10/1967 Newcomb et al. 89129 BENJAMIN A. BORCHELT, Primary Examiner.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Earth Drilling (AREA)
  • Toys (AREA)
US731491A 1967-07-07 1968-05-23 Automatic firearm with burst control means Expired - Lifetime US3440925A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE701106 1967-07-07
BE6041418 1967-07-07

Publications (1)

Publication Number Publication Date
US3440925A true US3440925A (en) 1969-04-29

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Application Number Title Priority Date Filing Date
US731491A Expired - Lifetime US3440925A (en) 1967-07-07 1968-05-23 Automatic firearm with burst control means

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US (1) US3440925A (en))
BE (1) BE701106A (en))
CH (1) CH469960A (en))
DE (1) DE1703360C3 (en))
FR (1) FR1564121A (en))
GB (1) GB1201685A (en))

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3803976A (en) * 1971-08-30 1974-04-16 H Visser Automatic pistol
EP0203034A3 (en) * 1985-03-22 1987-08-26 Fabbrica D'armi P.Beretta S.P.A. Shot-number limiters for automatic firearms
US20160069630A1 (en) * 2014-09-09 2016-03-10 Karl Hittmann Trigger Device for a Semi-Automatic Handgun

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3010370A (en) * 1961-04-05 1961-11-28 Stanley D Silsby Controlled burst firing mechanism
US3345914A (en) * 1966-03-31 1967-10-10 Fred N Newcomb Two round burst mechanism mechanical automatic rifle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3010370A (en) * 1961-04-05 1961-11-28 Stanley D Silsby Controlled burst firing mechanism
US3345914A (en) * 1966-03-31 1967-10-10 Fred N Newcomb Two round burst mechanism mechanical automatic rifle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3803976A (en) * 1971-08-30 1974-04-16 H Visser Automatic pistol
EP0203034A3 (en) * 1985-03-22 1987-08-26 Fabbrica D'armi P.Beretta S.P.A. Shot-number limiters for automatic firearms
US20160069630A1 (en) * 2014-09-09 2016-03-10 Karl Hittmann Trigger Device for a Semi-Automatic Handgun
US9651329B2 (en) * 2014-09-09 2017-05-16 Karl Hittmann Trigger device for a semi-automatic handgun

Also Published As

Publication number Publication date
GB1201685A (en) 1970-08-12
CH469960A (fr) 1969-03-15
FR1564121A (en)) 1969-04-18
DE1703360C3 (de) 1974-10-10
DE1703360B2 (de) 1974-03-07
DE1703360A1 (de) 1972-04-06
BE701106A (en)) 1967-12-18

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