US2330626A - Elevator for repetition and automatic firearms - Google Patents

Description

G. REVELLI Sept. 28, 1943.

ELEVATOR FOR REPETITION AND AUTOMATIC FIRE-ARMS Filed Oct. 6, 1939 Zhmoalj 6 .2720 FmZ/z" Patented Sept. 28, 1943 Property pusto'di'an The repetition automatic (guns,

machine-guns and the like), using, cartridge loaders in which the cartridges are displaced by a translation motion perpendicular to their axis and contained in the plane of the loaderyare provided with spring elevator devices pusl iingfthe whole" of the cartridges, towards the position where they are taken by the bolt to be thrustinto the barrel. I v

The elevators of cartridges known. till now have1a1l-the inconvenience not to support {in their exact predetermined position the cartridges of:the; l oade r as they exercise a variable push ingstrainijapplied in a variable position to the cartridge casing in contact vwith the I pushing member, of. the elevator, no mechanisml lavin been till now suggested capable of keeping its exact functioning even after a highnumberof shots of thepfire-arm. v

1- Theuseof modern materials and processes of production for gun-barrels has doubled' and;;

tripled thelifeand consequently the whole life of a fire-arm, so that the elevator device has to be constructed in such a way to be kept in perfect conditions of functioning for the life of the barrel, that is till the arm has to be sent back to a workshop to have the barrel repaired or changed.

One of the devices most known and used at large comprises an elevator consisting of a simple lever of third kind anteriorly fulcrumed with respect to the loader stressed at an intermediary point of its length by a spring preferably laminated bearing against the bottomcartridge of the loader with an arcuated end, the shape of which has the object to keep as long as possible unvaried the position of the elevators lever against the cartridge while the position of translation of the cartridge varies within the loader. Said device, when for instance applied to the Italian repetition gun Mod. 1891 often causes the obstruction of the last cartridge which may be not well held between the curved flanges of the loader.

Another device known in different forms of realisation comprises a Nuremberg shear system operated by a spring lodged under the loader. This device has the inconvenience to be very encumberous consequently not adapted for repetition and automaticportable arms.

Another system also known comprises a lever system shaped as an articulated parallelogram, two sides ofwhich being of a great-length and the other two of a relatively very short length. The control of the elevation by means of this the spring 3. o V According to a characteristic of the present I invention both levers I and II are curved, and;:'

ot the eversgnia simplylbea the other lever; I

owing to the strong influence; exercised on the he niember IofJcontaQt' of th get I pos o eto light plays 'th insistin support member forthe bottom lcartridgeg Q de 1 r fem =bp ifi ii'fi t r111 iollow'er, connectedby a piv' invention is illlistrated ifi ti-pre erred 'rorih vention applied to a repetition gun;

Fig. 2 shows the same-elevator in another position.

With reference to the drawing the elevator indicated byway of small strokes.

or follower 4 supporting the cartridges 5 contained in the loader 6 may beraised. The lever I is articulated with the ruler 4 by meansof. the pivot I. The prolongations 8 of the lever l be yond the pivot I cooperates" with the back end 9' of the member 4 so that this member is prevented from forming with the leverl an angle greaterthan the predetermined maximum one.

On the fixed pivot Iflfthere is fulcrumed the secondary lever II, provided with a pin I2 co.- operating with the profile surface I3 of the lever.

I. The profile surface I3 might be substituted by a groove of corresponding form. The end I4 of the lever II co-operates with theruler lslidr ing on its lower surface I5 which maybe fiat or conveniently shaped. The ruler I is kept bearing against the point Id of the lever lI' bythe presf; sure of the overlying Cartridge against which the ruler 4 is pushed by the lever I operated by am lte'vlliQ-Rome', Italy}vested'injtlie-Alien' f conveniences. are removed? the preso theendofpne v. ac -seemin i 11 1 shows an elev tartcaramgfio t substantially bent at right angle so that they may be disposed with the minimum encumbrance possible on the front and downwards with respect to the cartridge loader inserted into the 7 arm, 'nearly embracing the anterior, inferior angle of encumbrance of the loader provided with all its. cartridges; This disposition} oi the elevator is extraordinarily advantageous since greater room and consequently tear aQdapta-Q tions. U V, 7 Q

During the movement of elevation, that-is dur;

plate 4 has to be keptbearing on thepointylfi I oftl'ielever l' lfassum 'attfiejsan tinie-the positionf of theji n ferior enerajtrix of the casin of the bottoin cartridge asdt is'pre-establisheda for each, deter'ininedfarmi Consequently should the" casings of the cartridges i as'i'llustrated in Fig 1 ,be cylindrical the rule r -4 'rnus tfbe dis plat d bviemaining parallel to; itself j while if the casing of.the cartridges 'ijsconical; the ruler it lm d s'i b dibl madame?- venient sh-apej'of the'surfaces"l 3 and l5; which may be easilyjw'orked with high precision and had'ened in such afwav'that no remarkable trace ith the elevator according to the present secondary lever"! I Inthat way the'best possible u t ned r he car rid es 5. i ia the 4 has correspondently'tofvary' inclination while i the" other T F .nz d va a loader 6 during the whole stroke of the elevator.

By positioning the pivot 2 of lever I' substantially level with the mid point of the curve A-B the longitudinal or sliding movement of the lifter 5 against the cartridge is reduced to a'minimum.

The present, invention has. been illustrated and described in a; preferred; f cr m or; realisation, but

it isunderstood that constructive changes may be inserted therein without surpassing the limits Q of protectionof the present industrial patent.

l. A' cartridge feeding mechanism for v firearms including anupwardly extending magazine 5 adapted to receive a row of cartridges, a. lifting 1. vplate disposed beneath the cartridges in the mag- .l s v aZineLa lever of approximately L-shape provided 'ing the passage from the position illustratedin Fig. 1 to the one illustrated in Fig. 2, the liiting with a cam surface thereon and having its rear end. pivotally connected to the plate adjacent r ar e I, hesa sl, la d i war .pivotally connected to the fir-armfanarcw shaped: laye av n t z i t iv ta v connected t9 the fire-anti andits rear ena slide,--

bly'en ging the lifting pIa'teQa projection-extending .froni said second nanied lever for v slidable 25 engagement "with said 'carns'ur-fa'ce and [means 101 di ning said f rst naineddeven about its pivotal mounting to raise the'rear 'end'oi-saidfirst'named lever and by means of said cam surface and 1 t" n to turn'said-arcuate shapd} lever about 3 its mo V ng and raise'the'rearend thereoj;said c a rn' 'suiira cet'being' so' iorined'as to'maintain raising cohtacc'with'said projection 'tOc'ause' thc rea 'end-of said ieversgte traveltogether and; to nt inthe Iift'ing 'pIa'te'parallebtfithe fire-am 35 'through'out'the' entire rangeoNifting m Vement.

mechanism. as" specified "inf claim 1 wherein said first named lever is pivoted a point substantially level with the mid-point cl.

1 "the path oimiover'nent of the rear"end{o j said arno anmm

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