US3174399A - Firing mechanism for automatic firearms - Google Patents

Firing mechanism for automatic firearms Download PDF

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Publication number
US3174399A
US3174399A US171874A US17187462A US3174399A US 3174399 A US3174399 A US 3174399A US 171874 A US171874 A US 171874A US 17187462 A US17187462 A US 17187462A US 3174399 A US3174399 A US 3174399A
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US
United States
Prior art keywords
sear
breech bolt
face
pivot
support
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
Application number
US171874A
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English (en)
Inventor
Brieger Hans
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.)
Rheinmetall Air Defence AG
Original Assignee
Werkzeugmaschinenfabrik Oerlikon Buhrle AG
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 Werkzeugmaschinenfabrik Oerlikon Buhrle AG filed Critical Werkzeugmaschinenfabrik Oerlikon Buhrle AG
Application granted granted Critical
Publication of US3174399A publication Critical patent/US3174399A/en
Anticipated expiration legal-status Critical
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
    • F41A19/06—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms
    • F41A19/12—Sears; Sear mountings

Definitions

  • the invention relates to a firing mechanism for automatic firearms having a device for the displacement of a scar between a release position, in which a lock catch arranged on it is outside the range of an engaging portion of the breech bolt, and an engaging position, in which the lock catch engages into the path on which said engaging portion runs during the forward movement and the recoil stroke of the breech bolt, and having detent means co-operating with said displacement device for locking said sear in the release position.
  • the locking device which is mounted on the support of the weapon, is controlled by a component taking part in the recoil movement of the weapon relative toits support and forming the control device, in such a manner that the release of a lock catch is possible during the period at the end of the return of the weapon into the firing position and at the beginning of its recoil.
  • Such a construction assumes that the weapon is mounted moveably in such a manner that it advances after each recoil into a well defined starting position.
  • the device controlling the recoil and forward move ments of the weapon is laid out for certain reasons in such a manner that the weapon during the firing of a series of shots does not return to the starting position occupied at the beginning of the firing, but is braked at any time already during its advance and thrown back by the action of the following shot, the lengths of the advance paths of the individual shots may differ from one another, as well known.
  • the locking device cannot be brought at all by the control device out of the release position during the individual intervals between shots.
  • a firing mechanism for automatic fire arms comprising in combination: a stationary breech casing, a support, a breech bolt having an initial position in operation reciprocating under the influence of a return spring longitudinally over said breech casing, a scar having a lock catch pivotally mounted relative to said support, a displacement device operatively connected with said sear and displacing the latter between a release position, wherein said lock catch is kept outside the range of the engaging portion of said reciprocating breech bolt, and a holding position, wherein said lock catch engages into the path of said reciproeating breech bolt, during the recoil and advance thereof, and detent means co-operating with said displacement device in the sense of locking said sear in the release position, said breech bolt during the last part of its recoil stroke and first part of its forward stroke while its engaging portion is behind said sear
  • FIG. 1 illustrates the initial position
  • FIG. 2 the release position, e.g. the firing position with the trigger actuated.
  • FIG. 3 the transitory position from the release position to the holding position.
  • a casing 2 containing the firing mechanism is attached on the parts 1 of the breech casing.
  • the buffer spring 4 with damping elements is arranged for taking the impact when engaging the breech bolt 3.
  • self-damping annular disc springs may be provided.
  • One end of this spring abuts the casing 2 and the other end abuts a sleeve 5 which is longitudinally slidable in the casing 2.
  • the sleeve 5 has a cam 5a engaging into a slot 6 of the support 7 and abutting the latter.
  • This support 7 has a groove-shaped recess and is mounted in the casing 2, a locking slide 8 forming part of the displacement device and being guided in the interior of easing 2.
  • the forward portion of said locking slide has two faces 8a and 8b.
  • Two roof-like converging abutment cam faces and 8b are arranged ahead of an aperture 9, intowhich engages one arm 10b of a two-armed trigger 10 pivotally mounted on a pivot 11 fixed to the casing 2.
  • the second arm 10a thereof abuts a face 12 which can be raised and lowered when actuating the trigger mechanism (not shown).
  • the casing 2 is connected with a spring sleeve 13, in the bore of which a bushing 14 is moveably mounted.
  • the latter is subject to the bias of a spring 15 abutting the end-wall of said sleeve, and bears on the wall 8e of the locking slide 8, applying a pressure on it in the direction towards the wall 2a of the casing 2.
  • the displacement device comprises in addition to the locking slide 8, trigger 10, face 12 and trigger mechanism also the sleeve 13, bushing 14 and spring 15.
  • a sear 16 is pivotally mounted on a pivot 17 fixed to the side walls of the support 7.
  • a lock catch 18 having an engaging face 18a is inserted into the sear 16 rotatably about a pivot 19.
  • the pivot of this lock catch 18 and of the sear 16 are so arranged that a force applied substantially perpendicular to the engaging face 18a acts on the sear 16 in the sense of turning the same clockwise, while the same force acts on the lock catch 18 in the sense of turning the latter anticlockwise about the pivot 19, forcing thereby the lock catch 18 against the face 16a of the sear 16 and thus assisting the action of a spring 20.
  • the sear 16 has a supporting face 16b, a projection 21 with the faces 21a and 21b, as well as a bearing surface upon which the spring 28 from the support 7 passes.
  • a tumbler 22 is mounted on the support 7 pivotally about a pivot 23, the face 22a of which tumbler 22 is convexly curved towards the path of the breech bolt 3.
  • a detent member 24 is mounted pivotally about the pivot 25, and moreover in a bore of said tumbler a spring 26 is housed, which abuts the spring sleeve 13 and bears on the detent member 24 tending to turn the same to the positions illustrated in all three figures.
  • the mounting of the detent member 24 on the tumbler 22 is chosen in such a manner that said detent member 24 abuts said tumbler after a short movement.
  • the spring 26 applies a bias to the tumbler 22 turning the same anticlockwise about the pivot 23. It tends to turn the same into a rest position shown in FIGS. 1 and 2, in which its face 22b abuts the wall of the spring sleeve 13.
  • detent member 24 is provided with a projection having faces 24b and 240.
  • a groove 27 is cut, the rear boundary of which is formed as an engaging portion by the incline 3a, which leads into a control face 3b parallel to the path of movement of a projection of the breech bolt.
  • the firing mechanisrn is here illustrated in its initial position.
  • the looking slide 8 abuts with its rear end face 8e the wall 2:: of the casing 2.
  • the breech bolt bears with its incline 3a on the engaging face 18a of the lock catch 18 and thereby applies a moment to the sear 16, which tends to release the same, but cannot turn it owing to the forward portion of the locking slide 8 lying under the face 16b thereof.
  • the trigger mechanism i.e.
  • the arm 10a of the trigger 16 is raised, by raising the face 12 and by its other arm 16b the locking slide 8 is forced forward (to the left) while simultaneously loading the spring 15.
  • the detent member 24 is raised against the bias of the spring 26 by the cam face 8c of the locking slide 8 abutting its face 240, whereby the detent member 24 is slightly turned clockwise relative to the tumbler 22 which remains unmoved.
  • the cam faces 8c, 8:! of the locking slide 8 can move forward under and past the detent member 24.
  • the forward portion of the locking slide 8 acting as a bolster slides away under the face 16b of the sear 16, so that the bolstering thereof is abolished.
  • the detent member 24 then remains in its rest position, and the locking slide 8 can release the sear 16 for being turned into the holding position then only, when the advancing breech bolt 3 has slid with its control face 3b past the face 22a of the tumbler 22, and the latter turns upward together with the detent member 24 under the thrust of a locking slide 8.
  • the tumbler 22 accordingly acts as the control member for the locking slide 8. While being overlapped by the breech bolt 3 it prevents the locking slide 8 from releasing the sear 16 for turning into the holding position already at a moment, when, as in the position of the breech bolt indicated in FIG. 2 in chain-dotted lines, the time is no longer sufficient for turning the engaging face 18a of the lock catch 18 in good time sutficently high into the path of the incline 3a for engaging the same for full area contact, before the passing of the breech bolt 3 advancing again after its rear reversal.
  • the lock catch 18 when after releasing the trigger mechanism, the lock catch 18 has been returned into the path of the recoiling breech bolt 3 (moving to the right in the figure), the nose is resiliently depressed by said bolt running up its face 18b and is turned clockwise about the pivot 19 and thereby swung out of the path of the breech bolt 3 so that the latter can pass unhampered.
  • the latter is returned by the spring 20 to the holding position in order to catch the advance movement of the breech bolt 3 after the rear reversal thereof, in the initial position illustrated in FIG. 1, whereby the firing is terminated.
  • a firing mechanism for automatic firearms comprising in combination a support, a pivot on said support, a breech bolt having a control face reciprocating in operation on said support on a linear path of motion, an inclined surface on said breech bolt adjacent said control face inclined towards said path of motion at an inclination of less than a return spring acting on said breech bolt for the forward motion of said breech bolt, holding means for locking said breech bolt in an initial position, said holding means comprising a sear pivotable on said pivot having a stop face, an auxiliary pivot spaced from said pivot on said sear, a lock catch for said breech bolt pivotable on said auxiliary pivot having an engaging face cooperating with said inclined surface and an engaging face cooperating with said stop face, an auxiliary spring for the adjustment of said lock catch cooperating with said sear and said lock catch, spring means acting on said sear for loading said sear in the direction to breech bolt holding position, means for rotating said sear from said holding position to release position, said last named means comprising a locking slide operable
  • a firing mechanism for automatic firearms comprising in combination a support, a breech bolt reciprocating longitudinally relative to said support on a straight path of motion, with a rear reversal and a last portion of said path of motion in front of said rear reversal and a first portion behind said reversal, with an initial position on said path, an incline on said breech bolt sloped towards said path, a control face on said breech bolt adjoining said incline towards the rear, holding means pivotally mounted on said support having an engaging face extending towards said incline, a projection on said holding means, said holding means having a release position in which said engaging face is kept outside the range of said incline and a holding position in which said engaging face extends into said path, said holding means having a bearing surface and a supporting surface, a spring supported on one side on said support and on the other side on said bearing surface, said spring urging a rotation of said holding means to holding position, a locking slide having an operating surface and two cam faces movable to a

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Buckles (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
US171874A 1961-02-13 1962-02-08 Firing mechanism for automatic firearms Expired - Lifetime US3174399A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH169761A CH402670A (de) 1961-02-13 1961-02-13 Abzugsvorrichtung an selbsttätiger Feuerwaffe

Publications (1)

Publication Number Publication Date
US3174399A true US3174399A (en) 1965-03-23

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ID=4216475

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Application Number Title Priority Date Filing Date
US171874A Expired - Lifetime US3174399A (en) 1961-02-13 1962-02-08 Firing mechanism for automatic firearms

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US (1) US3174399A (de)
CH (1) CH402670A (de)
DE (1) DE1203164B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0123871A1 (de) * 1983-04-29 1984-11-07 Werkzeugmaschinenfabrik Oerlikon-Bührle AG Abzugseinrichtung für eine automatische Feuerwaffe
CN110243230A (zh) * 2018-03-09 2019-09-17 郎婳笛 轻型低后坐力自动武器

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2403477C2 (de) * 1974-01-25 1982-11-18 Wegmann & Co, 3500 Kassel Verschlußfangeinrichtung für fernbediente, automatische Feuerwaffen
DE4003600C2 (de) * 1990-02-07 1993-10-07 Mauser Werke Oberndorf Sicherungsvorrichtung für einen Verschluß-Fanghebel einer automatischen Feuerwaffe
DE102008009827B4 (de) * 2007-10-08 2014-10-16 Heckler & Koch Gmbh Sicherungsmechanik für Waffen
RU2447389C1 (ru) * 2010-10-07 2012-04-10 Государственное унитарное предприятие "Конструкторское бюро приборостроения" Автоматическое стрелковое оружие
RU2447388C1 (ru) * 2010-11-18 2012-04-10 Государственное унитарное предприятие "Конструкторское бюро приборостроения" Автоматическое стрелковое оружие

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE716924C (de) * 1937-11-04 1942-02-02 Rheinmetall Borsig Ag Abzugsvorrichtung fuer Feuerwaffen
US2524258A (en) * 1945-02-28 1950-10-03 Oerlikon Buehrle Ag Trigger mechanism for automatic firearms
DE925158C (de) * 1950-10-10 1955-03-14 Fernand Bruneau Selbsttaetige Feuerwaffe mit zurueckziehbarem Lauf und Abzugsvorrichtung fuer Einzel- und Dauerfeuer
US2765709A (en) * 1950-05-27 1956-10-09 Mach Tool Works Oerlikon Admin Trigger mechanism for automatic firearms
US2905058A (en) * 1954-05-21 1959-09-22 Brevets Aero Mecaniques Trigger mechanisms for recoiling automatic guns of the open breech type

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1511262A (en) * 1923-09-21 1924-10-14 John M Browning Automatic firearm
CH184909A (de) * 1939-06-17 1936-06-30 Oerlikon Buehrle Ag Abzugseinrichtung an automatischen Feuerwaffen.
US2342283A (en) * 1940-08-09 1944-02-22 Firearms Res Corp Rifle
NL113339C (de) * 1958-06-23

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE716924C (de) * 1937-11-04 1942-02-02 Rheinmetall Borsig Ag Abzugsvorrichtung fuer Feuerwaffen
US2524258A (en) * 1945-02-28 1950-10-03 Oerlikon Buehrle Ag Trigger mechanism for automatic firearms
US2765709A (en) * 1950-05-27 1956-10-09 Mach Tool Works Oerlikon Admin Trigger mechanism for automatic firearms
DE925158C (de) * 1950-10-10 1955-03-14 Fernand Bruneau Selbsttaetige Feuerwaffe mit zurueckziehbarem Lauf und Abzugsvorrichtung fuer Einzel- und Dauerfeuer
US2905058A (en) * 1954-05-21 1959-09-22 Brevets Aero Mecaniques Trigger mechanisms for recoiling automatic guns of the open breech type

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0123871A1 (de) * 1983-04-29 1984-11-07 Werkzeugmaschinenfabrik Oerlikon-Bührle AG Abzugseinrichtung für eine automatische Feuerwaffe
US4607563A (en) * 1983-04-29 1986-08-26 Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag Firing mechanism for an automatic firing weapon
CN110243230A (zh) * 2018-03-09 2019-09-17 郎婳笛 轻型低后坐力自动武器
CN110243230B (zh) * 2018-03-09 2021-11-30 郎婳笛 轻型低后坐力自动武器

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Publication number Publication date
CH402670A (de) 1965-11-15
DE1203164B (de) 1965-10-14

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