US2124911A - Automatic firearm - Google Patents

Automatic firearm Download PDF

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Publication number
US2124911A
US2124911A US27435A US2743535A US2124911A US 2124911 A US2124911 A US 2124911A US 27435 A US27435 A US 27435A US 2743535 A US2743535 A US 2743535A US 2124911 A US2124911 A US 2124911A
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United States
Prior art keywords
cartridge
carrier
breech
conveyer
action
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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US27435A
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English (en)
Inventor
Darne Regis
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Individual
Original Assignee
Individual
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Publication date
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Publication of US2124911A publication Critical patent/US2124911A/en
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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
    • 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

Definitions

  • the a; present invention relates to automatic firearms and its object is to provide a firearm of this kind which is safer to operate, easier to take to pieces, and of higher precisionthan firearms 5 of the same kind made up to this time.
  • a first feature of the present invention con sists in arranging the parts of the cartridge liftin g conveyer in such manner that the cartridges cannot escape accidentally from said conveyer under the effect of the vibrations due to the shock of the action carrier against the rear Vplate of the breech receiver. Furthermore, according to the invention, this cartridge lifting conveyer is so arrangedthat, when it reaches its higher position it can move down only when the cartridge is nearly wholly engaged into the chambenthus preventing any possible distortion of the cartridge when the latter is fed to the barrel.
  • the member intended to limit the, displacement of the action carrier toward the front is devised in such manner ⁇ as to further act as locking means for the cartridge lifting conveyer and also to be able to guide the movable breech 125 in perfectly axial relation withthe barrel.
  • Still another vfeature of the present invention consists in special meansfor fixing the feed cam on the action carrier andin the provision of a servo-pawl device intended to render im- "gj possible the incident knownunder the name of double feed, this incident consisting in a jamming of the cartridges in the feed passage as a result either of a blunder of the person who uses the firearm or of an insufficiently long Astroke of the mechanism'when the firearm is in action.
  • VStill another feature of the present" ⁇ invention consists in the provision of a connecting rod stopping device adapted to act both ways, this device being intended on the one hand to limit a yielding manner the displacements of the feed connecting rods which are always brought at the optimum 'angle into contact with the feed cam, andlon the other hand to permit the asp sembling of the parts of the firearm whatever betlie position of the 'pawl carrying slider.
  • Still another feature of the present invention consists in providing means which, while ensur ing a strong locking of the barrel, permits it to expand withoutiimpairing the precision of the arm il or disturbing its working.
  • Figs. 1 and 2 are' a'longitudinal sectional view and a transverse sectional View, respectively, illustrating the structure and operation of the cartridge lifting conveyer;
  • Fig. 3 is a. longitudinal view, in section, of the device for fixing the feed cam to the action carrier;
  • Fig. 4 is ⁇ a transverse sectional View of the firearm showing the servo-pawl in operation, before the cartridge in position in the feed passage has been withdrawn from the band of cartridges;
  • Fig. 5 is a longitudinal vertical sectional View corresponding to Fig. 4;
  • Fig. 6, is a View similar to Fig. 4, showing the parts in the position they occupy when the cartridge ⁇ has been withdrawn from the band;
  • the action carrier or frame I (Fig. l), which carries breech block 2, is violently thrown toward the rear by the gases. It rst strikes the buffer 3a and then the closure plate 3. Due to inertia, cartridge 4 has a tendency to slide in the jawsv 5% of conveyer 5 and to escape upwardly therefrom under the action of incline 6e which cooperates in ⁇ ,disengaging the cartridge from n saidV conveyer when said cartridge is engaged into 0 theuchamber ofthe barrel.
  • Several devices were suggested, prior tothe present invention, for causing this part 6 to play the part of an obturator.
  • l Breech receiver 1 is provided with .two projec- 35 tions l? and 11? andconveyer 5 is providedwith a heelhorzprojection 5c arranged in such manner that the rear end of the spring 8 of the conveyer engages said heelwhen the conveyer is in its upper position. According1y, conveyer 5 is pre- 40 vented from moving downwardly when the shock of carrier II on closureplate 3 occurs.
  • the space between projections 'la and IP is suflicientfor permitting the jaws of the conveyer, carrying a cartridge, to pass therebetweenMbut the jaws cannot move apart from each other, so that cartridge 4 can neither slide toward ⁇ the rear ⁇ nor escape upwardly, this being due 'also 4to the fact that the jaws 5a and 5b of the conveyer are engaged in the groove of the cartridge Vand are of slightly enveloping shape.
  • Piece II when it strikes the lowering pin III, serves to limit the stroke of the action carrier toward the front.
  • This piece is connected to tongue I2 through a stirrup I3, and this arrangement enables it to undergo without damage the vibrations and shocks to which it is subjected for each stroke of the action carrier.
  • VAs a matter of fact piece II bears constantly against the action carrier, at IIa and IIb, without spindle I2 undergoing any stress, owing to the fact that stirrup I3 permits it to slide with respect thereto until it reaches its optimum position.
  • Feed cam i5 (Fig. 3) is xed on the action carrier I by means of two pins I'b and Id which limit its position toward the rear, toward the top and toward the bottom.
  • This piece I5 is provided with a notch I5b in which is engaged the nose 8a of the spring 8 of the conveyer.
  • cam I4 is free to move toward the front and can thus easily be removed.
  • cartridges 50, 50a, 55h, etc., mounted in links 5I, Sla, 5Ib, etc., are fed successively into position in line with the axis of the machine gun, so as to be ready to be caught by the conveyer, the feed movement being imparted to the band of cartridges by pawl 55, pivotally mounted on slider 56, itself controlled by connecting rods interconnected with the action carrier.
  • the action of the pawl is controlled by a member 5T or servo-pawl.
  • cartridge 55 has not been removed from the band of cartridges, and from the feed passage, by the conveyer, it keeps servo-pawl 5l, pivoted at 51a to slider 56 in lowered position.
  • the nose 5'!b of said pawl 51 acts on pawl 55, itself pivoted at 55a and keeps it in inoperative position.
  • cartridge 5I! is suspended in the feed passage between the upper stop member 52 and the lower stop member 53, on the one hand, and fork 54, on the other hand.
  • Cartridge 5B depresses servo-pawl 5l through link 5I
  • cartridge 50 is withdrawn from the band. Consequently, the link 5I in which said cartridge was carried can now move upwardly (Fig. 6) and ceases to depress servo-pawl 5l, which releases pawl 55. The latter is thus in a position to bring a new cartridge 5E)ad into the place of the cartridge 50 removed from the conveyor.
  • the gun shown is of the type actuated by gas.
  • the bolting of the movable breech 2 between the back of the gun and the breech receiver 'I in the specification 'Ia provided for that purpose as well as the unlocking of the breech 2 are produced by the movements of the carrier mechanism I.
  • the carrier mechanism is actuated in the usual manner by admitting a portion of the combustion gases so as to act upon the piston I6 located in advance of the carrier mechanism and on the other hand by the reaction action of the spring a.
  • the admission of a portion of the combustion gases is secured through the gas chamber I6 which is in communication with the barrel 'I5 of the gun and with the tube 'I8 located in front of the piston I5.
  • the carrier mechanism I comprises a heavy portion b ⁇ which has the inclined surfaces c and c1 acting upon correspondingly inclined surfaces upon the breech block in order to cause a bolting thereof during its forward movement and an unlocking upon its rearward movement.
  • An automatic firearm comprising a breech block receiver, an action carrier movable in said breech receiver, a barrel fixed to said breech receiver, a barrel chamber for the cartridges, a feed passage, a device for conveying the cartridges from said passage to said chamber, said device comprising a cartridge lifting carrier having pivoted thereto grippers and a cartridge supporting lever, said grippers having external plane surfaces and internal bosses on said receiver cooperating with said plane surfaces preventing spreading of said grippers on the forward stroke of said action carrier.
  • An automatic firearm comprising a breech -block receiver, an action carrier movable in said breech receiver, a barrel fixed to said breech receiver, a barrel chamber for the cartridges, a feed passage, a device for conveying the cartridges from said passage to said chamber, said device comprising a cartridge lifting carrier having pivoted thereto grippers and a cartridge supporting lever, said cartridge lifting carrier having a shoulder, a spring engaging said shoulder preventing downward movement of said lifting carrier and means operative by said supporting lever disengaging said spring and permitting downward movement of said lifting carrier.
  • An automatic firearm comprising a breech block receiver, an action carrier movable in said breech receiver, a barrel fixed to said breech receiver, a barrel chamber for the cartridges, a feed passage, a device for conveying the cartridges from said passage to said chamber, said device comprising a cartridge lifting carrier having pivoted thereto grippers and a cartridge supporting lever, said cartridge lifting carrier having a shoulder, a spring engaging said shoulder preventing downward movement of said lifting carrier, a fixed abutment, a cam surface on said lever cooperating with said spring to dsengage the same from said shoulder upon contact of said lever with said abutment, whereby said lifting carrier is disengaged from a cartridge and is ready for a succeeding cartridge.
  • An automatic firearm comprising a breech block receiver, an action carrier movable in said breech receiver, a barrel fixed to said breech receiver, a barrel chamber for the cartridges, a feed passage, a device for conveying the cartridges fromV said Ypassage to said chamber, said ,Y
  • a cartridge lifting carrier having pivoted thereto grippers and a cartridge supporting lever and a member pivoted to said lifting carrier serving to take the forward shocks to said action carrier and also to lock said lifting carrier in said breech receiver.
  • An automatic firearm comprising a breech block receiver, an action carrier movable in said breech receiver, a barrel xed to said breech receiver, a barrel chamber for the cartridges, a feed passage, a device for conveying the cartridges from said passage to said chamber, said device comprising a cartridge lifting carrier having pivoted thereto grippers and a cartridge supporting lever and a member pivoted and longitudinally slidable to said lifting carrier serving to take the forward shocks to said action carrier and also to lock said lifting carrier in said breech receiver.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Branching, Merging, And Special Transfer Between Conveyors (AREA)
  • Buckles (AREA)
US27435A 1934-06-29 1935-06-19 Automatic firearm Expired - Lifetime US2124911A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR787904T 1934-06-29

Publications (1)

Publication Number Publication Date
US2124911A true US2124911A (en) 1938-07-26

Family

ID=9219220

Family Applications (1)

Application Number Title Priority Date Filing Date
US27435A Expired - Lifetime US2124911A (en) 1934-06-29 1935-06-19 Automatic firearm

Country Status (5)

Country Link
US (1) US2124911A (enMihai)
BE (1) BE409405A (enMihai)
CH (1) CH187732A (enMihai)
FR (1) FR787904A (enMihai)
GB (1) GB460706A (enMihai)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2486878A (en) * 1945-01-01 1949-11-01 Gen Motors Corp Reversible shell feeder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2486878A (en) * 1945-01-01 1949-11-01 Gen Motors Corp Reversible shell feeder

Also Published As

Publication number Publication date
FR787904A (fr) 1935-10-01
CH187732A (fr) 1936-11-30
BE409405A (enMihai)
GB460706A (en) 1937-01-28

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