[go: up one dir, main page]

US2536997A - Pivoted lock mechanism for breech bolts of automatic firearms - Google Patents

Pivoted lock mechanism for breech bolts of automatic firearms Download PDF

Info

Publication number
US2536997A
US2536997A US713958A US71395846A US2536997A US 2536997 A US2536997 A US 2536997A US 713958 A US713958 A US 713958A US 71395846 A US71395846 A US 71395846A US 2536997 A US2536997 A US 2536997A
Authority
US
United States
Prior art keywords
energy accumulator
breech
locking
breech block
front part
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
US713958A
Other languages
English (en)
Inventor
Lippert Hanns
Hepperle Erwin
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 US2536997A publication Critical patent/US2536997A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F41A3/00—Breech mechanisms, e.g. locks
    • F41A3/12—Bolt action, i.e. the main breech opening movement being parallel to the barrel axis
    • F41A3/36—Semi-rigid bolt locks, i.e. having locking elements movably mounted on the bolt or on the barrel or breech housing
    • F41A3/38—Semi-rigid bolt locks, i.e. having locking elements movably mounted on the bolt or on the barrel or breech housing having rocking locking elements, e.g. pivoting levers or vanes

Definitions

  • the present invention relates to an automatic firm-arm with one-piece breechblock, in which the locking of the breechblock is effected in a novel way by means of a locking mechanism of extremely simple design.
  • the automatic firearm with one-piece breechblock is characterised by the feature that for bringing the breech look into locking position at least one energy accumulator is provided, consisting of two parts connected by an energy-accumulating organ, the rear part holding the lock in the open position, while the front part catches behind the lock fitted in a seat of the breech casing, thus keeping up the pre-tension of the energy-accumulating organ, in such a manner that the breechblock on its forward run, under tension of the energy accumulator, moves the rear part of the energy accumulator to an extreme forward position, thus removing the rear part of the energy accumulator out of the position in which it keeps the lock open as soon as the breechblock comes close to its forward reversal position, the lock is moved into locking position by the front part of the energy accumulator
  • Fig. l is a longitudinal section through an automatic firearm with one-piece breechblock, in
  • Figs. 2-4-various positions of the breechblock on an enlarged scale Fig. 2 showing the breechblock at the moment it engages the rear part of the energy accumulator, while Fig. 3 shows the parts in the position in which the rear part strikes the front part of the energy accumulator, Fig. 4 showing the result of the rebound of the front part of the accumulator in the cammin-g upwardly of the locking means into the operative position.
  • Fig. 5 is a section along line I-I in Fig. 4;
  • Fig. 6 is a section along line II--II in Fig. 4;
  • Fig. '7 shows the breechblock at the forward limit of its movement with the locking means held in the operative position by the front part of the energy accumulator;
  • Fig. 8 illustrates the action of the gas-operated rod on the front part of the energy accumulator whereby the locking means are released;
  • Fig. 9 shows the locking means cammed into 2 the inoperative position by the rear surface of the breechblock with the rear part of the energy accumulator about to overlap the locking means;
  • Fig. 10 shows the seating of the lock on an enlarged scale
  • Fig. 11 is a section along line III-III in Fig. 9;
  • Fig. 12 shows an automatic fire-arm, in section, according to a second constructional example
  • Fig. 13 shows on an enlarged scale a position of the breechblock according to the constructional example of Fig. 12 just after the release of the locking means;
  • Fig. 14 is a section through the breechblock casing with breech and the organs locking the latter, in the alternative with two locks; while Fig. 15 shows a modification of the construction according to Fig. 14 with the locking means arranged to engage a forward portion of the breechblock.
  • Fig. l designates the barrel inserted in known manner in the breech casing 3 by means of a bayonet joint 2. Within the breechblock casing 3 slides the breech 4 under the action of a recuperating spring 5.
  • S designates schematically the trigger mechanism.
  • an energy accumulator consisting of the two parts i and 8 connected together by means of an energy-accumulating organ, a spring 9, by Way of example.
  • Hi designates the look fitted in a seating ll of the breech casing.
  • the breech casing is slidingly fitted in a cradle i2 so as to recoil against the action of a spring l3.
  • the two parts 'i' and 3 constitutin-g the energy accumulator are fitted in the breech casing 3, laterally of the breechblock, the rear part 8 resting on rails It of the front part i of the energy accumulator.
  • the rails it are connected together at the rear ends by a web (bridge) l5, by means of whicn they seize behind the lock it at its face it (see Figs. 1, 2, 9 and 10).
  • the rear part 8 resting-as already mentionedon the rails 14 of the front part i, and fitted in the breecnblock casing laterally of the breechblock (see Fig. 6), is provided with shouders it coming in contact with stops it; of the breechblock 4.
  • the rear part 8 of the energy accumulator during the forward travel of the breechblock, overlaps a projection I9 of the lock IE3.
  • the lock It] itself is provided with a slanting face 2@, which in the locked position of the breech contacts another slanting face 2i of the breech block 4.
  • These two faces are shaped so as to be selfunlocking, in other words, should a force acting
  • a body 33 Fig. 11
  • the two parts i and 8 of the energy accumulator are connected together by the spring ii standing under a permanent definite pie-tension.
  • the breech block In the position represented in Fig. 2 the breech block is on its forward travel and, with its stops i8, comes into contact with the shoulders if of the rear part 8 of the energy accumulator.
  • the lock it itself-owing to the fact that the rear part 8 of the energy accumulator is resting on its projection l-is prevented from moving against the breech block, in other words, friction between breech block and lock which might impair the firing rate, does not arise.
  • Fig. 3 shows the manner in which the two parts i and 8 of the energy accumulator engage one another, while in Fig. i a slight unst-ressing of the energy-accumulating organ has already taken place, the lock it, however, being already in the completely locked position.
  • the web iii now underlaps the lock, the spring 9 being further unstressed, as shownin Fig. 7.
  • a gas rod 28 presses back the front part 1 of the energy accumulator, tensioning the spring and depriving the lock Iii of its underlapping through the web i5 and-causing it to swing downward under the action of the remaining gas pressure forces, since the faces 28 and 2i by which it bears on the breech block i, are self-unlocking.
  • Fig. 14 shows a constructional example in which the breech block 4 is locked by two looks it. These two locks'are laterally arranged in the breech casing 3 and are actuated in exactly the same way as in the constructional example ac- They catch behind the breech block 3 at its rear part. With a view to shortening the length of the weapon, the constructional example according to Fig. 15 provides for the locks It to catch behin the breech block 3 at its front part.
  • the functions of the other parts carrying out the locking process are exactly the same as in the constructional example according to Figs. 1-11.
  • Automatic fire-arm comprising a casing, a
  • mechanism for moving the locking means into locking position comprising at least one energy accumulator having a front and a rear part acted upon by an energy-accumulating organ, the rear part of the energy accumulator being arranged to hold the locking means in the open position, while the front part of the energy accumulator is adapted to catch behind the locking means, and means for moving the rear part of the energy accumulator forwardly on the forward run of the breech :block, whereby the energy accumulator is placed under tension and the rear part of the energy accumulator is moved out of the position in which it keeps the locking means in the'open position, the front part of the energy accumulator being slidable under the action of the tensioned organ, as soon as the breech block comes into proximity of its front reversal position, to move the looking means into locking position, the locking means in the front reversal position of the breech block being underlapped by the front part of the energy accumulator and thereby held in looking position.
  • the locking means comprises a pivoted member swing able into and out of locking position, and wherein the surfaces along which the locking means and breech block engage are inclined in such manner that the direction of the force transmitted by the breech block to the looking means forms with the straight line connecting the center of the force-transmitting area of such surfaces and the fulcrum of the locking means an angle which is greater than the angle of friction, so that upon removal of the underlapping of the locking means by the front portion of the energy accumulator, unlocking occurs automatically.
  • Automatic fire-arm according to claim 1 including a striker mounted on the breech block, the front partof the energy accumulator being arranged to move the striker into firing position as such part moves into its end position underlapping the locking means.
  • Automatic fire-arm including a rod actuated by gas under pressure from the barrel for initiating unlocking of the locking means, said rod being arranged to engage the front part of the energy accumulator to move said part out of the position in which it supports the locking means in the operative position.
  • Automatic fire-arm including a cradle for slidably supporting the breech casing, a stop on the cradle, a lever pivoted on the breech casing and engaging the front part of the energy accumulator and arranged to strike said stop during the recoiling movement of the breech casing, whereupon said lever operates to 'move the front part of the energy accumulator out of the position in which it supports the looking means in operative position.
  • Automatic fire-arm comprising a cradle; a breech casing slidable on the cradle; a breech block slidable in the casing; and means for looking and releasing the breech block and comprising a locking member seated in the breech casing and normally disposed out of the path of the breech block, and an energy accumulator including a front part, a rear part, and a compression spring disposed between said parts, the rear portion of the front part engaging the locking member along inclined surfaces of such shape that the locking member is urged into locking position, the rear part having a portion normally overlying the locking member to hold the same in inoperative position, and means actuated by the breech block on its forward travel to shift the rear part of the energy accumulator to cause release of the locking member and to compress said spring, whereupon said locking member is urged into locking position by the front part of the accumulator under the action of said spring.
  • Automatic fire-arm according to claim 12 including means actuated by the pressure of the explosion gases in the barrel to shift the front part of the accumulator rearwardly to release the locking member.
  • Automatic fire-arm according to claim 12 including mechanism operative after the firing of the shot to move the front part of the accumulator rearwardly to release the locking member.
  • an energy accumulator is disposed upon opposite sides of the breech block.
  • Automatic fire-arm comprising a cradle; a, breech casing slidable on the cradle; a breech block slidable in the casing; and means for locking and releasing the breech block and comprising a locking member supported on the breech casing and normally disposed out of the path of the breech block, and a floating energy accumulator including .a front part and a rear part movable relative to each other and both slidable in the casing, and a compression spring disposed between said ,parts, the rear part holding the locking member in inoperative positionand being movable by the breech block as it approaches its forward reversal position to release the locking member, While simultaneously compressing the spring, the front part engaging the locking memher and acting under the pressure of the so-compressed spring to cam the locking member into locking position, means operative upon firing of a cartridge to move the .front part rrearwardly REFERENCES CITED
  • the following references are of record in

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Toys (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US713958A 1945-12-06 1946-12-04 Pivoted lock mechanism for breech bolts of automatic firearms Expired - Lifetime US2536997A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH261658T 1945-12-06

Publications (1)

Publication Number Publication Date
US2536997A true US2536997A (en) 1951-01-02

Family

ID=4523949

Family Applications (1)

Application Number Title Priority Date Filing Date
US713958A Expired - Lifetime US2536997A (en) 1945-12-06 1946-12-04 Pivoted lock mechanism for breech bolts of automatic firearms

Country Status (7)

Country Link
US (1) US2536997A (de)
BE (1) BE469639A (de)
CH (2) CH261658A (de)
DE (1) DE844559C (de)
FR (1) FR937798A (de)
GB (1) GB618757A (de)
NL (1) NL71848C (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2789479A (en) * 1952-11-08 1957-04-23 Mccoll Alexander Stone Bolt lock and retracting mechanism for gas operated machine gun
US2798415A (en) * 1952-12-24 1957-07-09 Company Brevets Aero Mecanique Breechbolt lock for automatic firearms
US2900878A (en) * 1955-10-04 1959-08-25 Nomar Arms Inc Toggle breech block locking means for a gas piston operated gun
US3318191A (en) * 1965-07-09 1967-05-09 Frederick P Reed Machine gun with a mount for reducing the recoil forces applied to the trunnions
US3872771A (en) * 1972-10-10 1975-03-25 France Etat Automatic firearm with gas actuated breech mechanism
US6109160A (en) * 1996-03-13 2000-08-29 Zanieri; Gianni Breechblock for automatic or semi-automatic weapons
US20100088942A1 (en) * 2006-10-25 2010-04-15 Svatopluk Petruj Recoil absorbing firearm

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB489752A (en) * 1929-05-01 1938-08-03 Rheinmetall Borsig Ag Improvements in or relating to automatic guns
DE706158C (de) * 1937-03-12 1941-05-19 Rheinmetall Borsig Akt Ges Selbsttaetige Feuerwaffe mit gleitendem Lauf

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB489752A (en) * 1929-05-01 1938-08-03 Rheinmetall Borsig Ag Improvements in or relating to automatic guns
US2202201A (en) * 1929-05-01 1940-05-28 Rheinmetall Borsig Ag Automatic gun
DE706158C (de) * 1937-03-12 1941-05-19 Rheinmetall Borsig Akt Ges Selbsttaetige Feuerwaffe mit gleitendem Lauf

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2789479A (en) * 1952-11-08 1957-04-23 Mccoll Alexander Stone Bolt lock and retracting mechanism for gas operated machine gun
US2798415A (en) * 1952-12-24 1957-07-09 Company Brevets Aero Mecanique Breechbolt lock for automatic firearms
US2900878A (en) * 1955-10-04 1959-08-25 Nomar Arms Inc Toggle breech block locking means for a gas piston operated gun
US3318191A (en) * 1965-07-09 1967-05-09 Frederick P Reed Machine gun with a mount for reducing the recoil forces applied to the trunnions
US3872771A (en) * 1972-10-10 1975-03-25 France Etat Automatic firearm with gas actuated breech mechanism
US6109160A (en) * 1996-03-13 2000-08-29 Zanieri; Gianni Breechblock for automatic or semi-automatic weapons
US20100088942A1 (en) * 2006-10-25 2010-04-15 Svatopluk Petruj Recoil absorbing firearm
US8074391B2 (en) * 2006-10-25 2011-12-13 Petruj Svatopluk Recoil absorbing firearm

Also Published As

Publication number Publication date
BE469639A (de) 1947-01-31
CH275693A (de) 1951-05-31
FR937798A (fr) 1948-08-26
CH261658A (de) 1949-05-31
NL71848C (de) 1953-03-16
GB618757A (en) 1949-02-25
DE844559C (de) 1952-07-21

Similar Documents

Publication Publication Date Title
US8117957B2 (en) Breech device for a hand firearm
US4825744A (en) Automatic pistol
US4015512A (en) Gas-operated firearm
GB1056056A (en) An improved rifle
US2523704A (en) Automatic firearm breech bolt locking mechanism
US2536997A (en) Pivoted lock mechanism for breech bolts of automatic firearms
US3678800A (en) Self-loading pistol with cocking trigger
US2785605A (en) Firing mechanism for automatic rifles
US4841840A (en) Firing mechanism for a semi-automatic arm
US2622359A (en) Firing mechanism for guns
US2366823A (en) Firing mechanism for firearms
US2031305A (en) Automatic firearm
US2341780A (en) Automatic firearm
GB430493A (en) Improvements in or relating to automatic firearms
US2365389A (en) Firearm
GB649519A (en) Improvements in automatic shotgun
US804694A (en) Automatic firearm.
US2604821A (en) Locking device for fire control mechanism
US12072162B1 (en) Compact gas-operated autoloading firearm mechanism
US976122A (en) Automatic firearm.
RU2003123148A (ru) Способ работы автоматики оружия с приводом механизма подачи боеприпасов от ствола при его откате и автоматическое огнестрельное оружие на его основе
US3901126A (en) Automatic small arm
US2039814A (en) Firearm
US1026609A (en) Automatic firearm with fixed barrel and locked breech.
US2429650A (en) Front sear for rifles