US2031305A - Automatic firearm - Google Patents

Automatic firearm Download PDF

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Publication number
US2031305A
US2031305A US687218A US68721833A US2031305A US 2031305 A US2031305 A US 2031305A US 687218 A US687218 A US 687218A US 68721833 A US68721833 A US 68721833A US 2031305 A US2031305 A US 2031305A
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US
United States
Prior art keywords
post
breech
barrel
breech block
piston
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
US687218A
Other languages
English (en)
Inventor
End Gotthard
Gaetzi Jakob
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.)
Schweizerische Industrie Gesellschaft
Original Assignee
Schweizerische Industrie Gesellschaft
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 Schweizerische Industrie Gesellschaft filed Critical Schweizerische Industrie Gesellschaft
Application granted granted Critical
Publication of US2031305A publication Critical patent/US2031305A/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
    • F41A3/00—Breech mechanisms, e.g. locks
    • F41A3/12—Bolt action, i.e. the main breech opening movement being parallel to the barrel axis
    • F41A3/14—Rigid bolt locks, i.e. having locking elements rigidly mounted on the bolt or bolt handle and on the barrel or breech-housing respectively
    • F41A3/32—Rigid bolt locks, i.e. having locking elements rigidly mounted on the bolt or bolt handle and on the barrel or breech-housing respectively the bolt being rocked about a notional axis transverse to the barrel axis
    • 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
    • F41A19/25—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins
    • F41A19/27—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block
    • F41A19/29—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block propelled by a spring under tension
    • F41A19/30—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block propelled by a spring under tension in bolt-action guns
    • 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
    • F41A3/64—Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings
    • F41A3/78—Bolt buffer or recuperator means
    • F41A3/82—Coil spring buffers
    • 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
    • F41A5/00—Mechanisms or systems operated by propellant charge energy for automatically opening the lock
    • F41A5/18—Mechanisms or systems operated by propellant charge energy for automatically opening the lock gas-operated

Definitions

  • the invention more particularly relates to au.- :tomatic gas operated firearms having a' 'statio'ne ary barrel and a locked breech bolt.
  • the main object of the invention is the pro duction of a firearm of the type aforesaid of --very simple Construction, of extreme accuracy and of absolute reliability.
  • Fromran'automatic weapon which, on account :of its highifiring power, is allocated to apartic'- ularly expert marksman, great precision is ex- .pected. This lprecision should'be equivalent to that of an ordinary repeating weapon.
  • Figs. l and 2 illustrate the ⁇ principle of the invention, 'the rear of the barrel being shown 72 with the breech mechanism in side elevation, partsbeingshown in section;
  • Figs. 3 and l show the back part of 'the weaponin longitudinal vertical section with closed and open breech
  • Figs. 5 and 6 areside views of the breech mech'- an'i's'min closed and open 'positions respectively;
  • Figs. 7' and ⁇ 8 show the striker post and a breech looking member separately in plan; V i
  • Figs 9 and -10 are cross-sections on the lines .35 -IX IX ⁇ and X-X of Figs. 7 and 8 respectively.
  • 'a gas chamber casing '2 is rigidly attached 'to the :barrel l, communicating therewith by a hole 23, andhaving a gas piston-3 fitted therein.
  • the breech mechanism 'of the 40 *weapon consists of a breech block 'I and a post 5.
  • Thebreech block 4 is shown in the locked'position and is held in this position by the post 5.
  • In 'the 'looking 'of the breech block &the latter abuts -jagain'sta wallof'the fixed breech casing E, which is 'rig-idl'y attached to 'the barrel l.
  • Figs. 2 and 4 show themechanism when the bree'eh block ⁇ 4 'is in its open position. In this position the 'breech block 4 with the post 5 are held *bythe trigger 35 (Figu a) against the action of the compressed spring 1. The gas piston 3 is held in the front position by the piston spring 8.
  • the breech block 4 (Figs. 3 and 5) lies at an inclination.
  • the pressure transmitted from the rear of the Cartridge on to the breech block is transmitted by the rear upper face, the so-called locking face ID, on to the breech casing 6 rigidly connected to the barrel l.
  • the back part of the breech block 4 projects in the said inclined locked position through an opening !4 (Figs. 3 and 4) of the breech casing 6 and is prevented from shifting upward by two side lugs !3 (Fig. 3) on the edge of the opening l4. Underneath, the breech block 4 is supported on the supporting surface !5 of the post 5 and is thus Secured in the locked position.
  • the breech block 4 is horizontal.
  • the turning of the breech block 4 out of the locked position takes place about a horizontal axis in the plane of the front end face 40.
  • the breech block rocks on this axis in a Vertical plane which contains the axis of the barrel.
  • the post 5 is constructed and arranged to hold down the cartridges in the magazine and is arranged not toaccompany the turning movement of the member 4. This post 5 holds the cartridges in the low position necessary for the subsequent rise of a cartridge in front of the delivery member 3! forming part of the bolt.
  • the bolt 5 is movable on fillets ll in grooves 12 on 4 and in casing 6 respectively to such an extent that it releases the column of cartridges in the magazine when the uppermost Cartridge 42 has to rise in front of the breech mechanism as soon as the mechanism reaches its rearmost position.
  • Two lugs l on the under side of the breech block 4 act as guides for part 29 and engage the topmost Cartridge on the forward stroke of the mechanism so as to position the Cartridge for firing.
  • This straight movement of the post 5 is utilized for the looking of the breech block 4.
  • the post 5 assumes together with locked breech block 4 the front position shown in Fig. 5 and it rests with its face l'l against the lower part of the looking face of the breech block 4.
  • the sup- -porting face !8 of the post which secures the breech block 4 in the locked inclined position, runs horizontally.
  • the looking is effected by the post 5, when the member 4 has reached its forward position, raising, by means of the looking ramp !9, the looking ramp 20 at the back part of the breech block 4 (Fig. 5).
  • the breech block 4 assumes the locked position when its lower surface rests on the upper surfaces !3 of the post 5.
  • the further forward movement of the bolt 5 no longer varies the position of the breech block 4 and it consequently merely supports said breech block.
  • the post 5 In the opening movement of the breech the post 5 first moves below the face !5 of the breech block 4, without influencing said block. Thereupon the unlocking ramps 2! of the post 5 run on to 22 of the breech block 4 and deflect the back part of the latter downwardly. The member 4 thus unlocked is rigidly coupled with the post 5 and makes the opening movement therewith.
  • the closing spring i is arranged centrally and bears at the back against the rear 27 of the casing 6.
  • the lug 26 carries the firing pin 23.
  • the post 5 acting as a driving weight, is therefore also the striking mass for effecting the firing. This firing is only possible with the breech block locked since the firing pin 23, firmly connected to the post 5, can only pass beyond the front face of the breech block when the post is in its most forward position.
  • the gas piston rod 9 reaches into the range of the breech mechanism. It runs for its whole length under the barrel l and is oarried in a hole of the casing 6, between the casing 6 and the barrel l specially constructed for this purpose.
  • the post 5 has a bolt projection 29 which, directed forward and cutting through the cartridge guide surface 30 of the casing 6, reaches a point underneath the rear end of the barrel l (Fig. 3). In the foremost position of the post it rests with its front face 3
  • the gas piston movement taking place on the firing is transmitted through the points 32, 21 directly on to the post 5. Due to this transmission of movement to the post member 5 great advantages are obtained in the Construction of the weapon.
  • the line of force runs from the gas piston 3 in a direct straight line to the post 5 and this in the centre plane of the weapon.
  • the lock projection 29 runs according to Fig. 9 between the two fillets !6 of the breech block 4.
  • the rear face 32 of the gas piston rod 9 only runs into the position indicated in dotted lines in Fig. 4. From such point the front end 3! of the post 5 leaves the gas piston rod 9 and runs the remainder of the back stroke by itself.
  • the gas piston 3, together with the gas piston rod 9 is again pushed forward by the piston spring 8 when the action of the gas pressure in the cylinder 24 is terminated.
  • the bolt projection 29 has on the subsequent unl'ocking of the breech block passed behind the front face of the breech block, corresponding to the displacement of the post 5 with respect to the breech block on the unlocking. consequently when it reaches the rear position it releases the upper Cartridge for lifting in front of the fillets H of the breech block 4, whereby it is loaded on the completion of the next closing process.
  • the Cartridge guide surface 30 is so constructed that the recess for the bolt projection 29 in no Way affects the insertion.
  • the lug 26 against which the closing spring 1 bears is arranged well forward, so that this spring 1, in spite of its central arrangement, is sufllciently long.
  • the breech block 4 gives it sufficient room, within its range, by a half-round ing spring 1.
  • the guide sleeve 33 can then be drawn back in the post 5 up to a stop ⁇ not shown in such manner that it is itself sufliciently held in the guide sleeve 25 of the post 5.
  • the inserted closing spring T in spite of the greater untensioned length, is supported over'the whole untensioned length, after the insertion of the casing cover 21 with the guide rod 36. In this way the usual difficult insertion of the closing spring in the case of weapons with partial external and partial internal closing spring guide, is avoided.
  • the tubular guide 33 is carried in the post 5 so as be easily movable, the latter is easily movable on the guide 33 on the next loading movement, the said guide when still in the assembled position having previously reached the end plate 21 and being retained there.
  • the post 5 is retained in its rear position by a trigger rod. On the subsequent release of its detent the post 5 moves forward under the action of the closing spring 'I and fires with the firing pin 28.
  • the length of the supporting surface !8 may also be increased, thus giving a good striking eifect. It is however possible to retain the arrangement described with extended supporting surface
  • Fig. 9 shows this arrangement with locked breech block 4 and post on bolt 5 retained by a sear.
  • Fig. 10 corresponds to the moment of firing, the sear having freed the bolt.
  • a breech mechanism including a breech block and a longitudinally movable post carrying said breech block to move it into and from breech closing positiongsaid breech block being also independently movable relative to said post to a limited extent; a gas cylinder on the barrel and in communication with the bore thereof to receive gas from the fore part of the barrel, a piston movable in said cylinder, a piston rod extending par- 'all'el to the barrel and connected with one end to said piston, the other end being free and being adapted toengage the forwardend of said post which post is adapted to close and open saidmagazine, means independent of said post to return .said piston to its initial position after having actuated said post, said piston and piston rod being arranged to impart such momentum to the post as to cause it to move the breech block re'arwardly into open position and to un- -coverthemagazine so that the next cartridge may be :
  • a breech mechanism including a breech block and a lcngitudina1lymovable post carrying said breech block to move itinto and from breech closing position, saidlbreech block being also independently movable relatively 'to said post to a limited extent; a gas cylinder on the barrel and in communication with the bore thereof to receive gas from the fore part of the barrel, a piston movable *in said cylinder, a piston rod extending parallel to the barrel and connected with one end to said piston, the other end being free and being adapted to engage the forward end of said post which is also adapted to close and open said magazine, means independent of said post to return said piston to its initial position after having actuated said post said piston and piston rod being arranged to impart such momentum to the post as tocause it to move the breech block rearwardly into open position and to uncover the magazine so that the next Cartridge may be moved into a position for feeding it
  • breech casing provided at the upper end of its rear wall with a looking face adapted to be engaged by the rear end of the breech block when the latter is moved by said post forwardly into breech closing position
  • said breech block and post being provided each with rigid cooperating cam means adapted to move said breech block during the forward movement of said post into an inclined position with the rear end of said breech block raised in engagement with said looking face, whereby the breech 'block is locked in breech closing position.
  • breech casing provided at the upper end of its rear wall with a looking face adapted to be engaged by the rear end of the breech block when the latter is moved by said post forwardly into breech closing position
  • said breech block and post being provided with cooperating rigid cam means adapted to move said breech block during the forward movement of said breech block raised in engagement with said looking face, whereby the breech block is locked in breech closing position
  • said post being provided with a firing pin in permanent alinement with the axis of the barrel said firing pin reaching its firing position at the end of the forward stroke of the post immediately after the breech block has been moved and locked by said post in breech closing position.
  • a breech mechanism including a breech block and a. longitudinally movable post carrying said breech block to move it into and from breech closing position, said breech block being also independently movable relatively to said post to a limited ⁇ extent;
  • a gas cylinder on the barrel and in communication with the bore thereof to receive gas from the fore part of the barrel, a piston rod extending parallel to the barrel and connected With one end to said piston, the other end being free and being adapted to engage the forward end of said post which is also adapted to close and open said magazine, means independent of said post to return said piston to its initial position after being actuated by gas pressure, said piston and piston rod being arranged to impart such mom'ntum to the post as to Cause it to move the breech block rearwardly into open position and to uncover the magazine so that the next Cartridge may be moved into a position for feeding it into the barrel, said post and said piston rod being arranged in a common plane and in proximity to the axis of the barrel,

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US687218A 1932-09-03 1933-08-28 Automatic firearm Expired - Lifetime US2031305A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB171420X 1932-09-03
GB300633X 1933-06-30

Publications (1)

Publication Number Publication Date
US2031305A true US2031305A (en) 1936-02-18

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ID=26252505

Family Applications (1)

Application Number Title Priority Date Filing Date
US687218A Expired - Lifetime US2031305A (en) 1932-09-03 1933-08-28 Automatic firearm

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US (1) US2031305A (enrdf_load_html_response)
BE (1) BE398412A (enrdf_load_html_response)
CH (1) CH171420A (enrdf_load_html_response)
ES (1) ES131693A1 (enrdf_load_html_response)
FR (1) FR761924A (enrdf_load_html_response)
GB (1) GB405728A (enrdf_load_html_response)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494889A (en) * 1947-03-08 1950-01-17 Brevets Aero Mecaniques Gas piston operated firearm
WO2004029535A1 (de) * 2002-09-04 2004-04-08 Heckler & Koch Gmbh Verriegelte selbstlade-feuerwaffe
WO2004029534A3 (de) * 2002-09-04 2004-06-03 Heckler & Koch Gmbh Handfeuerwaffe mit verriegeltem verschluss
US20050132875A1 (en) * 2002-09-04 2005-06-23 Johannes Murello Locked automatic and semi-automatic firearms
US20050217473A1 (en) * 2002-09-04 2005-10-06 Johannes Murello Firearms having a locked breech
US20050235817A1 (en) * 2002-09-04 2005-10-27 Johannes Murello Firearms with gas pressure loading mechanisms
US20050235543A1 (en) * 2002-04-09 2005-10-27 Johannes Murello Cartridge ejection mechanisms and methods for operating the same
US20050241471A1 (en) * 2002-09-04 2005-11-03 Johannes Murello Firearms and methods for operating the same

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494889A (en) * 1947-03-08 1950-01-17 Brevets Aero Mecaniques Gas piston operated firearm
US20050235543A1 (en) * 2002-04-09 2005-10-27 Johannes Murello Cartridge ejection mechanisms and methods for operating the same
WO2004029535A1 (de) * 2002-09-04 2004-04-08 Heckler & Koch Gmbh Verriegelte selbstlade-feuerwaffe
WO2004029534A3 (de) * 2002-09-04 2004-06-03 Heckler & Koch Gmbh Handfeuerwaffe mit verriegeltem verschluss
US20050132875A1 (en) * 2002-09-04 2005-06-23 Johannes Murello Locked automatic and semi-automatic firearms
US20050217473A1 (en) * 2002-09-04 2005-10-06 Johannes Murello Firearms having a locked breech
US20050235817A1 (en) * 2002-09-04 2005-10-27 Johannes Murello Firearms with gas pressure loading mechanisms
US20050241471A1 (en) * 2002-09-04 2005-11-03 Johannes Murello Firearms and methods for operating the same
US7237469B2 (en) 2002-09-04 2007-07-03 Heckler & Koch, Gmbh Firearms having a locked breech
US7311032B2 (en) 2002-09-04 2007-12-25 Heckler & Koch, Gmbh Firearms with gas pressure loading mechanisms

Also Published As

Publication number Publication date
FR761924A (fr) 1934-03-30
BE398412A (enrdf_load_html_response)
GB405728A (en) 1934-02-15
CH171420A (de) 1934-08-31
ES131693A1 (es) 1933-10-16

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