US2669160A - Belt feed for firearms - Google Patents

Belt feed for firearms Download PDF

Info

Publication number
US2669160A
US2669160A US98736A US9873649A US2669160A US 2669160 A US2669160 A US 2669160A US 98736 A US98736 A US 98736A US 9873649 A US9873649 A US 9873649A US 2669160 A US2669160 A US 2669160A
Authority
US
United States
Prior art keywords
cartridge
breechblock
belt
cam
stroke
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
US98736A
Other languages
English (en)
Inventor
Maillard Bernard
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.)
Brev Aero Mecaniques S A Soc
Society "brevets Aero-Mecaniques" S A
Original Assignee
Brev Aero Mecaniques S A Soc
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 Brev Aero Mecaniques S A Soc filed Critical Brev Aero Mecaniques S A Soc
Application granted granted Critical
Publication of US2669160A publication Critical patent/US2669160A/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
    • F41A9/00—Feeding or loading of ammunition; Magazines; Guiding means for the extracting of cartridges
    • F41A9/29—Feeding of belted ammunition
    • F41A9/32—Reciprocating-slide-type belt transporters
    • 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
    • F41A9/00—Feeding or loading of ammunition; Magazines; Guiding means for the extracting of cartridges
    • F41A9/29—Feeding of belted ammunition
    • F41A9/30—Sprocket-type belt transporters
    • 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
    • F41A9/00—Feeding or loading of ammunition; Magazines; Guiding means for the extracting of cartridges
    • F41A9/29—Feeding of belted ammunition
    • F41A9/32—Reciprocating-slide-type belt transporters
    • F41A9/33—Reciprocating-slide-type belt transporters with cartridge stripping means
    • 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
    • F41A9/00—Feeding or loading of ammunition; Magazines; Guiding means for the extracting of cartridges
    • F41A9/38—Loading arrangements, i.e. for bringing the ammunition into the firing position
    • F41A9/39—Ramming arrangements
    • F41A9/40—Ramming arrangements the breech-block itself being the rammer
    • 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
    • F41A9/00—Feeding or loading of ammunition; Magazines; Guiding means for the extracting of cartridges
    • F41A9/54—Cartridge guides, stops or positioners, e.g. for cartridge extraction
    • F41A9/56—Movable guiding means
    • F41A9/57—Flexible chutes, e.g. for guiding belted ammunition from the magazine to the gun

Definitions

  • the present invention relates to semi-automatic rearrns the reloading of which takes place automatically but with which the gunner must operate the trigger upon every shot, automatic firearms iiring by bursts and arms capable of working either in a semi-automatic or in a fully automatic manner, these firearms including a movable breech piece having a reciprocating motion in a direction substantially parallel tothat of the firing axis of the arm.
  • a feeding device operted step by step by the movable breechblock so that two successive steps correspond to a total feed displacement of an amplitude equal to the pitch and take place, respectively, the first one during the recoil stroke of said breechblock and the second one at the rend of the frontward return stroke thereof
  • Figs. l to 4 show, respectively in vertical section, in top View with .parts in section and parts cutaway, and in 'cross sections in two dilerent respective vertical planes, an automatic firearm made according to the invention; g 1
  • ylilig'.' Sis a transverse half-section ofafirst construction ofthe device operatedby the movable vbreecliblock fory actuating the feeding Kde-rv Vquerif.:
  • Figs. 'l ⁇ and 8 show, respectively in cross section and in longitudinal section on the line VIII-EVIII of Fig. 7, a second construction.
  • the whole of the barrel and of breech casing 3 is supported by a stock :ty withrespect to which said whole is given a reciprocating motion V(recoil movement and return movement) during the operation of. the firearm.
  • V reciprocating motion
  • f o Y e I mount on said stock a cover l, intended to reg-fceive the feedingdevicaianda feed guide 8, the latter supporting the belt'lA andfbeing provided with a gapinfitfs middlepcrtion to permit passage, between two introduction-,edges 8a, ofthe... breechblock nose Eaduring'fthe step of intro1u..v tion of the'cartridge into the arm barrel.
  • a co'verl doesvnot participate in the recoil',movementv of breechv casing 3 and that, due tothe fact thatfit is stationary, it is particularly adaptedtoact assupport for the feeding device intendedto ⁇ move' beltl.
  • This feeding device is arranged tojproduce a discontinuousstep by stepmovementof said belt, the movement of 4one cartridge over afdistance equal to the pitch therefore taking place in two steps, to Wit a preparatory step of. an amplitude. equal to one halffpitch, the effect ofwhich is to bring this rcartridge into awaiting position (shown for cartridge 2 in the Diagram ,l of Fig, 5), and a complementary step,Y also ⁇ of onehalf? pitch, ensuring the passage of said cartridge ⁇ from this waiting position to the introductoryuposi-w tion (shown at 2 on the Diagram of Eig.;5,) 1., K
  • every full reciprocation of said breechblock producing first the complementary step relative to the cartridge which is in waiting position and the introduction of this cartridge into the cartridge chamber and, then, the preparatory step relative to the next cartridge which is thus brought into waiting position.
  • said device is controlled by breechblock 5 in such manner that the complementary step of a cartridge in waiting position takes place during the breech recoil stroke and begins only after said breechblock has travelled through a Vsubstantial portion of this recoil stroke.
  • the beginning of the complementary step may correspond to breechblock 5 having already moved a distance equal to two thirds of its recoil stroke.
  • Such a device includes two sliding members 9 and I0 carried by cover 1 and capable of moving transversely with respect to the axis of the rearm, these sliding members being tted with respective pawls I I and I2, said pawls being each retracted against the action of a spring (not shown) when the corresponding sliding member moves in a direction opposed to the direction of feed of belt I and coming on the contrary to catch a cartridge and to drive said belt over a distance corresponding to one half of the pitch when said sliding member is moved in the direction of forward feed of the belt.
  • Sliding members 9 and I0 are controlled by an oscillating lever I3 hinged aboutia pivot axis I4 on cover 1, and connected to said sliding members in such manner that they move in opposite direcof a roller 20 carried by said lever I3 and movtions to each other, for which purpose, for instance, sliding member I0 is directly acted upon by the front end of lever I3 and there is interposed between said end and sliding member 9 a link I5 pivotally mounted on cover 1 about an axis I6 located substantially opposite the middle point of said link.
  • Oscillating lever I3 is driven by movable breechblock 5 by means of a camming mechanism including a cam I1 pivoted (about axis I8) to breech casing 3 and subjected to the action of a return spring I9 intended to keep said cam in correct position when said cover is closed.
  • a camming mechanism including a cam I1 pivoted (about axis I8) to breech casing 3 and subjected to the action of a return spring I9 intended to keep said cam in correct position when said cover is closed.
  • Connection between cam I1 and lever I3 takes place through a device adapted to permit recoil movement of breechblock casing 3 with respect to cover 1, for instance through the intermediate ing between guides 2
  • a cam follower constituted by a roller 22 is mounted on breechblock 5 ⁇ opposite cam I1, the active portions of said cam being., arranged in such fashion that, on the one hand, the complementary step of a cartridge in waiting position takes place after the breechblock has moved a distance corresponding to a substantial portion of its recoil stroke (active portion
  • the whole of the active portions I1a (corresponding to the end of the recoil stroke of the breechblock) and I1b (corresponding to the second fraction of its return stroke) therefore has a characteristic curve with a double concavity which is shownby a reinforced line on the diagrams of Fig. 5, points ra and rb of this curve (which might possibly coincide together) corresponding respectively to the beginning of the intervention of active portion I1a during the recoil stroke of movable breechblock 5 and of active portion I1@ during the return stroke of said movable breechblock.
  • This phase corresponds to the complementary step which brings cartridge 2 between the edges 8a, i. e. across the path of travel of the nose 8a of the breechblock; during the first portion of the return stroke of the breechblock 5, cartridge 2 is extracted from the belt which is stationary and is introduced into the cartridge chamber; when roller 22 moves past point 1t and only from this time on, the active portion I1b is acted upon and cam I1 is returned (position shown by Diagram IV) into the position it occupied initially (Diagram I), this phase of the operation corresponding to the preparatory step for the next cartridge, which cartridge is then brought into waiting position at a distance from the ring axis equal to one half of the pitch. The various elements of the arm are then back into their initial position and the cycle is repeated upon the next recoil stroke of the breechblock.
  • said breechblock has moved backward to a distance non negligible but however insuilcient for catching the cartridge, in which case, for an arm tted with a feeding device of a conventional type which starts bringing the cartridge into position of introduction as soon as the recoil stroke begins, wedging of the arm would be unavoidable.
  • breechblock 5 is protected against the transverse reaction, produced for instance by the action of roller 22 against cam Il, by fitting this breechblock with at least one bearing piece, such for instance, as a roller 23, cooperating in the transverse direction with a bearing surface, such for instance, as a rectilinear rail 24 rigid with the breech casing 3.
  • roller 23 is so located as to absorb the perturbing reaction in the very region where it originates, whereby I avoid any tilting torque which might produce wedging of the breechblock.
  • I may for instance, as shown by Figs. 1 to 3, mount roller 23 coaxially with roller 22 Iand immediately below (or above) it.
  • I may also, as shown by Fig. 6, provide two rollers 23 located coaxially with roller 22, respectively above and below said roller, in which case the perturbing torque is wholly eliminated.
  • a rearm of the type described in which the cartridges are detachably carried by a belt and juxtaposed along said belt transversely thereto at a constant interval or pitch from one another which firearm comprises, in combination, a stock, means forming a cartridge chamber movable with respect to said stock in a direction parallel to the axis of said chamber, a cover rigid with said stock, a breech casing rigid with said chamber, a breechblock movable in said breech casing with a reciprocating motion parallel to the axis of said cartridge chamber and including a recoil stroke and a return stroke, means carried by said breechblock for pushing into said cartridge chamber, during the return stroke of said breechblock, a cartridge located in a lgiven position parallel to said axis, a feeding device for moving said belt transversely to said axis with a step by step displacement of an amplitude equal for every step to one half of said pitch, alever pivoted to said cover and operatively connected with said feeding mechanism for operation
  • a firearm of the type described in which the cartridges are detachably carried by a belt and juxtaposed along said belt transversely thereto at a constant interval or pitch from one another which firearm comprises, a combination, a stock, means forming a cartridge chamber movable with respect to said stock in a direction parallel to the axis of said chamber, a cover rigid with said stock, a breech casing rigid with said chamber, a breech block movable in said breech casing with a reciprocating motion parallel to the axis of said cartridge chamber and including a recoil stroke and a return stroke, means carried by said breech block for pushing into said cartridge chamber, during the return stroke of said breech block, a cartridge located in a given position parallel to said axis, a feeding device for moving said belt transversely to said axis with a step by step displacement of an amplitude equal for one step to a portion of said pitch and for the next step to another portion of said pitch such that the sum of these two portions is equal to

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Toys (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
US98736A 1948-06-19 1949-06-13 Belt feed for firearms Expired - Lifetime US2669160A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB678078T
LU281167X 1948-06-19

Publications (1)

Publication Number Publication Date
US2669160A true US2669160A (en) 1954-02-16

Family

ID=26267880

Family Applications (1)

Application Number Title Priority Date Filing Date
US98736A Expired - Lifetime US2669160A (en) 1948-06-19 1949-06-13 Belt feed for firearms

Country Status (7)

Country Link
US (1) US2669160A (fr)
BE (1) BE489581A (fr)
CH (2) CH281167A (fr)
FR (1) FR988387A (fr)
GB (2) GB678000A (fr)
LU (1) LU29099A1 (fr)
NL (2) NL93282C (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2875671A (en) * 1953-08-06 1959-03-03 Russell S Robinson Ammunition belt feed system for automatic firearms
US3563132A (en) * 1968-09-19 1971-02-16 Us Navy Grenade launcher
US4539890A (en) * 1982-09-03 1985-09-10 Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag Cartridge infeed apparatus for automatic firing weapons
US5691497A (en) * 1993-10-08 1997-11-25 Heckler & Koch Self-loading grenade launcher

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE515574A (fr) * 1951-11-17

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US863101A (en) * 1904-10-21 1907-08-13 Andreas Wilhelm Schwarzlose Automatic gun
DE700629C (de) * 1936-02-07 1940-12-24 Rheinmetall Borsig Akt Ges Verschlussgesteuerter Hebelantrieb fuer Patronengurte in Maschinenwaffen
US2417080A (en) * 1940-08-24 1947-03-11 Nasa Cartridge feed system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US863101A (en) * 1904-10-21 1907-08-13 Andreas Wilhelm Schwarzlose Automatic gun
DE700629C (de) * 1936-02-07 1940-12-24 Rheinmetall Borsig Akt Ges Verschlussgesteuerter Hebelantrieb fuer Patronengurte in Maschinenwaffen
US2417080A (en) * 1940-08-24 1947-03-11 Nasa Cartridge feed system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2875671A (en) * 1953-08-06 1959-03-03 Russell S Robinson Ammunition belt feed system for automatic firearms
US3563132A (en) * 1968-09-19 1971-02-16 Us Navy Grenade launcher
US4539890A (en) * 1982-09-03 1985-09-10 Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag Cartridge infeed apparatus for automatic firing weapons
US5691497A (en) * 1993-10-08 1997-11-25 Heckler & Koch Self-loading grenade launcher

Also Published As

Publication number Publication date
CH284468A (fr) 1952-07-31
NL93282C (fr)
GB678000A (en) 1952-08-27
LU29099A1 (fr)
BE489581A (fr)
FR988387A (fr) 1951-08-27
NL93280C (fr)
GB678078A (en) 1952-08-27
CH281167A (fr) 1952-02-29

Similar Documents

Publication Publication Date Title
US2146185A (en) Automatic firearm
US2644365A (en) Feed mechanism for automatic firearms cartridge belt feed type
US2093169A (en) Automatic firearm, in particular machine gun
GB1229025A (fr)
US2669160A (en) Belt feed for firearms
US3241447A (en) Cartridge ramming device of a gun
US3650175A (en) Rotary sprocketed feeder for belted ammunition
US3198075A (en) Automatic firearm with a recoiling barrel
US2756640A (en) Breech block locking means
US3289535A (en) Breech operating mechanism for a gas pressure loader for guns
US2389960A (en) Automatic gun
US2365459A (en) Automatic gun
US3417657A (en) Toothed rotor mechanisms for automatic guns fed from two cartridge belts
US2875671A (en) Ammunition belt feed system for automatic firearms
US1007911A (en) Automatic firearm.
US3680433A (en) Semi-automatic shotgun having rotary and sliding breech block
US2889749A (en) Sprocket type feeding for a gas piston gun
US2876680A (en) Pivotally mounted oscillating breech member coupled with a ramactor mechanism
US2920536A (en) Recoil and shock absorbing means for a reciprocating gun
US2367488A (en) Automatic firearm
US2977854A (en) Single-sprocket twin-barrel gun
US3234850A (en) Breech mechanisms for automatic firearms having a recoiling tube
US2899865A (en) Cartridge feeding mechanism
US3242815A (en) Cartridge ramming device for introducing cartridges into the cartridgechamber of the barrel of a gun
US1518498A (en) Automatic firearm