WO2019207328A1

WO2019207328A1 - Ammunition magazine with great capacity

Info

Publication number: WO2019207328A1
Application number: PCT/HR2019/000010
Authority: WO
Inventors: Erwin BEKTO
Original assignee: Bekto Erwin
Priority date: 2018-04-24
Filing date: 2019-04-24
Publication date: 2019-10-31
Also published as: HRP20180652A2

Abstract

A high capacity ammunition magazine shaped and sized taking into consideration the dimension of the bullets or the envelope comprising a certain number of bullets in a particular column within the magazine, arranged so that the adjacent envelopes are tangent to each other, wherein the parts of the circle with radius R₁ (5.1) connecting the bottoms (1.1) of the bullets/cartridges, and a part of the circle with radius R₂ (5.2), connecting the diameters (1.2) at the tip of the bullet cartridges as well as a part of the circle with radius R₃ (5.3) connecting the tips (1.3) of the bullets correspond to the same angle α₁, and each of the radiuses is within the full span of the arch corresponding to the angle α of the same amount. The feed mechanism within the magazine housing, acting with a certain force on the bullet feeder and hence on all bullets arranged in columns and layers within the magazine housing, consists of the bullet feeder (8.1), a small spring (8.2), a large spring (8.3), a joint (8.4) between the small and large spring and the lower support (8.5) and lower cover (8.6) of the magazine, wherein the shape of the central axis (8.7) of the feed mechanism follows the shape of the central axis (8.8) of the magazine housing, The magazine housing designed as a single-piece tube of a required shape, subject to circumstances and needs, may be manufactured with appropriate technological processes from different materials, including the injection methods of plastic materials of adequate properties.

Description

DESCRIPTION OF THE INVENTION

AMMUNITION MAGAZINE WITH GREAT CAPACITY

1. Technical field

The present invention relates to a firearm ammunition magazine covered by the technical field failing under Class F41A9/61 of the International Patent Classification. .

2. Technical problem

The technical problem is a multiple aspect one wherein the principal problem solved with this invention originates from the fact that previous technical solutions of the magazine had not achieved a direct and consistent correlation between the bullet size and volume and the shape of the available space for such bullets in the magazine housing which actually means that the problem arises as a consequence of the fact that technical solution of the available space in the magazine housing is neither correlated to nor reflects the bullet dimensions, primarily in respect of the volume and shape of the inner space as well as the shape of the space in the magazine housing where the bullets are placed and through which they move during the loading and unloading, resulting in the fact that such technical solution of the magazine is neither consistent with nor optimally adapted to the bullets for which the magazine has been designed and, due to such unsuitability, the possibility of even and compact stacking of bullets within the housing is reduced with consequent reduction of a particular magazine capacity, i.e. a reduced number of bullets of corresponding dimensions that can be stacked within the magazine volume/space.

Another aspect of the technical problem is that the magazine housing is not a single piece one but made up of several component parts not only requiring a lot of time for their assembling in a single whole which reflects upon the magazine price but involves a particularly important fact that the inner surface of such magazine cannot be shaped to achieve a small distance between the bullets inside the magazine housing whereby not only the compactness but also the specific capacity of the magazine are reduced.

In addition to the above described aspects of the technical problem resulting from inadequate reflection of the bullet size to the technical solution of the magazine housing, another technical problem arises as a rule due to the fact that the structure with corresponding bend radius of the inner feed mechanism is not compatible with the configuration and geometrical features of the inner surface of the magazine housing where the bullets are placed which prevents even and smooth moving of the bullets through all magazine loading and unloading stages. Among all above mentioned problems encountered with magazines and solved with the present invention, of absolute priority and importance is the fact that the present invention solves technical problems in respect of the manufacture of the magazine using certain types of plastic materials which, in addition to their properties which come close to and in certain cases even outperform the materials traditionally used in the manufacture of magazines, also feature additional properties including the possibility of manufacturing the magazines by their reprocessing using the injection method..

Thus realistic possibilities for a radical shortening of the manufacturing cycle are achieved, the weight is significantly reduced, the useful life of the magazine is extended since the corrosion is fully eliminated and the manufacturing price is drastically reduced.

3. State of the art

The first evidence of rifles in Europe dates back to 14th century and the magazines have been used for more than a century in which period steel was the material predominantly used for the manufacture of rifles and magazines with continuous attempts to reduce the weight and price while increasing the reliability of the rifle alone and in combination with the magazine, which resulted in the use of different composite materials aimed at achieving these objectives. .

As far as the magazines are concerned, ever increasing requirements in respect of the number of bullets available for use with the rifle in ever more demanding modes of use had a great and decisive influence upon determination of requirements regarding their development in the past, which also resulted in that, in addition to one magazine attached to the gun, spare bullet containing magazines were also provided which naturally resulted in that, in determining the requirements for the magazines, the activities related to the concept and design of a magazine of as high capacity as possible, with a volume capable of receiving as many bullets as possible, were given an ever increasing priority and importance.

In the past, bullets of very different dimensions had been used but, over the time, adequate standardisation was introduced whereby such great variety of dimensions was reduced to a minimum.

In addition to attempts to increase the magazine capacity, efforts were made to develop and manufacture magazines which would be adequate for use with as many types of rifles and ammunition as possible and to facilitate the magazine loading procedure within the shortest possible time and in the easiest possible way, while eliminating the possibility of jamming or deformation during the loading and unloading.

Understandable are the attempts to achieve a good price of the magazine and its long useful life without failures or wear and tear. Today, many magazines exist differing in a number of parameters so that we still cannot speak about compatibility of technical solutions and their realisation in practice.

4. Essence of the invention

The essence of the solution of the technical problem according to the present invention includes several new, crucial solutions which represent a novelty in respect of the known state of the art solutions, whereby a number of superior essential characteristics and properties of the magazine is achieved.

The essence and the backbone of the technical solution of the magazine according to the present invention is that the technical solution of the magazine housing, where the bullets are placed and through which they move during the loading and unloading is defined taking into consideration the relevant bullet dimension data as a basis and predominant criterion for defining the shape of the space and, in the first place, the bend radius of such space within the magazine housing, wherein the technical solution of the magazine housing represents the best solution for the bullets for which such magazine has been designed, which means that such inner configuration and geometry of the space within the magazine housing are achieved which enables even and compact stacking of the bullets inside the magazine, directly resulting in a maximum possible capacity of the magazine, i.e. the maximum possible number of bullets of corresponding dimensions which can be stacked within the volume/space of the magazine housing.

The above described adaptation of the magazine housing to the bullets for which they are designed, makes it possible to achieve the conformity between the shape and bend radius of the feed mechanism and the shape and the corresponding bend radius of the housing space or the inner configuration of the space of the magazine housing where the bullets are placed, whereby even movement of the bullets through all loading and unloading stages is enabled.

A special characteristic of the technical solution according to this invention is a possibility of using a variety of different low specific weight materials for the manufacture of the magazine component parts, including plastics the non-corrosive properties whereof allow a reduced weight and extended useful life.

Of critical importance in the process is to create realistic prerequisites for the manufacture of magazines using also the materials having all property of plastics with a possibility of their reprocessing by injection method with such a possibility having the attribute of a revolutionary event, which is understandable taking into consideration that with such realistic prerequisite make it possible to radically shorten the manufacturing cycle, to significantly reduce their weight, to fully eliminate corrosion, to achieve an unlimited useful life with a drastic reduction of the magazine price. Among the information about any magazine, its capacity, i.e. the number of bullets of corresponding dimensions that can be stacked within the volume/space of the magazine is the most important information which synthesises the level of successfulness of the technical solution of any magazine under a number of criteria and it is therefore self-explanatory why magazines are ranked by their capacity.

In the context of the technical solution according to the present invention, the magazine capacity predominantly depends on its housing, in particular the geometry and configuration of its inner surfaces.

The magazine capacity is actually the capacity of its housing whose shape and almost all inner but also the outer dimension are predominantly dictated by its inner volume where the bullets are places, wherein almost all outer dimensions of the housing are at the same time the outer dimensions of the magazine.

The magazine capacity is derived from the volume, shape and bend radius of the space within the magazine housing where the bullets are placed and through which they move during the loading and unloading, wherein according this invention the volume, space and bend radius of the space within the magazine housing are determined taking into account the bullet dimensions resulting in a technical solution of the magazine which is to the greatest possible extent adapted to the bullets for which the magazine has been designed, which means that with the inner configuration and geometry of the space within the magazine housing so achieved allows for event and compact stacking of the bullets within the housing.

Therefore, the dimensions of bullets of various shapes, sizes and purposes represent a data set to be taken into account in defining the magazine houses, where such data vary within certain limits and today such dimensions are regulated by specific standards and a common characteristic of all bullets is their round shape along the whole length, wherein their diameter size varies at certain points of their length with the largest diameter being that of the base, i.e. the bottom of the cartridge and gradually decreasing from the bottom to the tip.

As an illustration, the Figure 1 shows an example of a bullet indicating several dimensions of relevance for the presentation of the technical solution according to this invention, where it is clearly visible that the bullet diameters from the bottom of the bullet, i.e. bottom of the bullet cartridge (1.1), over all diameters on the remaining part of the bullet length (1.3) up to its tip are not reduced in a gradual continuity but the line connecting the bullet diameters up to its tip is broken with two largest diameters, one of them being the diameter of the bottom (1.1 ) of the bullet, i.e. the cartridge and the other being the diameter of the cartridge towards the tip of the bullet before the reduction of its diameter (1.2), from which it follows that the straight lines (1.6) are tangential to the two largest and most prominent diameters, (1.1 and (1.2), at a certain angle a (1.5), wherein such two straight lines (1.6) belong to the sheath forming the contours of the space within which a single whole bullet is placed which, with the total length (1.3) of the bullet forms the envelope enclosing the space required for placement of a single bullet.

The amount of a particular and hence the total capacity of the magazine expressed in a total number of bullets of corresponding dimensions which can be placed in a magazine of a certain volume and shape of the space results from the manner of stacking the bullets within the magazine space or more specifically, from interrelations of the envelopes of the adjacent bullets, wherein the envelopes have a corresponding amount of the volume of the space required for placement of a single bullet..

It is clear that the maximum amount of a specific and hence the total capacity of the magazine is achieved if the bullets within the magazine are arranged so that the envelopes of adjacent bullets of the same type within the whole volume of the magazine space intended for the placement of bullets, or within the housing of the magazine, lean one against the other with the central axes of the envelopes of the adjacent bullets lying in the same plane and the central axes of the bullet envelopes lying perpendicular to the central axis (8.8) of the magazine whereby a minimum gap is achieved between the envelopes. .

Therefore, in the attempt to achieve a technical solution of a magazine with the highest possible capacity expressed in the total number of bullets that can be placed therein, it is understood that the shape and volume of the space of the magazine housing are modelled so to achieve the maximum specific and hence the total capacity of the magazine..

As an illustration of geometric layouts resulting from the stacking of bullets within the magazine housing in the attempt to achieve the largest possible capacity and hence the highest possible compactness of the magazine as a whole, the Figure 2 shows and example of one layer consisting of four bullets positioned adjacent to each other with the central axes (2.6) lying in the same plane from which it is visible that the bullet dimensions require that:

BBS > Bvsi where BBS (2.1) - is a sum of the base diameters of 4 bullets and Bvs (2.2) - is the length between two tangents (2.5) touching the tips of the cartridges of 4 bullets placed adjacent to each other with their central axes (2.6) lying in the same plane wherein the total lengths (L^) of each bullet are equal.

The lines (2.5) touching the points of the outer perimeter are at the angle□ (2.4) and represent the corresponding lateral parts of the envelope of four bullets positioned to that their central axes (2.6) are lying in the same plane. A view of the parts of two adjacent columns of 6 bullets each, with the central axes of each column comprising 6 bullets lying in the same but separated planes is shown in the Figure 3, wherein R_BR,

(3.1) is the bend radius of the bullet bases, i.e. cartridge bases while RVR (3.2) is the bend radius of the tips of the bullets arranged in the same way so that the width B_BR (3.5) corresponds to the length of the arch of the bend radius R_br> (3.1) of the bullet bases while B_VR (3.4) is the length of the arch of the bend radius R_VR (3.2) of the bullet tips.

“The envelope" (4.1 ) as the outer wall of the cross section of the space for placement of four bullets in one layer is shown in the Figure 4, with the central axes of the bullets iying in the same plane. The space encompassed by the inner surface (4.4) of the magazine housing in respect of the space within the envelope (4.1) of the bullets must, of course, be increased by a certain amount whereby adequate space is provided for the placement and also for undisturbed and smooth movement of the bullets within the space encompassed by the inner surface (4.4) The so sized inner surface (4.4) of the magazine housing must, of course, be increased for the necessary thickness of the wall (4.2) of the housing thus determining the dimensions of the outer surface (4.3) of the magazine housing which is also the outer size of the cross section of the magazine.

By applying the above described procedure of the magazine housing sizing, based on consistently taking into consideration the bullet dimensions as a starting point, in case of a larger number of bullets in a column, arranged so that the adjacent envelopes touch each other which is a general objective when the bullets are placed within the magazine housing according to this invention, there are apparently great differences between the radius Ri (5.1) of the circle connecting the bottoms (1.1) of the bullets/cartridges and the radius R₂ (5.2) of the circle connecting the diameters

(1.2) at the tip of the bullet cartridge as well as the radius R₃ (5.3) of the circle connecting the tips

(1.3) of the bullets, wherein all these three circles have the same centre (5.8), R3 (5.3), The above described views shown in the Fig. 2, Fig. 3 and Fig. 4 P illustrate that the dimensions of the outer bullet contour require that when a certain number of bullets arranged adjacent to each other in a column or a layer with their central axes Iying in the same plane, the envelopes (2.5), (3.3) and (4.1), of the bullets so arranged assume the shape of a trapezoid where the joints between its sides, instead with the lines as is usually the case with the geometric shape of a trapezoid, are achieved with certain radius, as shown in the Figure 6 of the shapes (6.1) and (6.2) of the cross section perpendicular to the central axis of the magazine.

The magazine housing according to this invention takes the form of a compact tube the interior whereof, both in terms of the shape and dimensions, is determined by the dimensions of the bullets intended to be housed within the magazine, so that its bend radiuses ,Ri, (5.4), R₂, (5.5) and R₃, (5.6) as well as the trapezoid shape of its interior follow from the bullet dimensions, shape of the envelopes (2 5), (3.3), (4.1) of the bullet layers and columns. So, the magazine housing according to this invention is a compact tube of certain wall thickness with the cross sections perpendicular to the central axis of the magazine of a trapezoid shape virtually along the whole length, from the very bottom of the magazine housing almost to the top, wherein the shapes of the interior of the trapezoidal shape of the cross section,, the dimensions whereof may vary slightly, and the inner surface of the magazine housing is shaped so to achieve functional correlation between it and the internal feed mechanism.

The cross section along the axis perpendicular to the bullets shown in the Figure 7, illustrates the structure and layout of the component segments of one example of the magazine when it is fully loaded with bullets arranged in 4 columns (7.5), and a certain number of layers (7 6) of the bullets where, in the event when the magazine is fully loaded with bullets, individual housing segments are indicated, in particular:

7.1 - a - adapter zone,

7.1 - b - transitional segment,

7.1 - c - magazine storage and bullet holding space,

7.1 - d -the space occupied by the spring loaded feed mechanism.

The feed mechanism installed within the magazine housing feeds the bullets acting with a certain force upon the first bullet layer in front of it and thus to all bullets arranged in columns and layers within the magazine housing after this first layer and, according to this invention, it consists of a bullet feeder (8.1), a small spring (8.2), a large spring (8.3), a joint (8.4) between the small and large spring and the lower support (8.5) of the large spring with the lower magazine cove leaning against it.

The magazine feed mechanism is symbolically shown in the Figure 8 in correlation with the magazine housing where the mechanism is located and performs its role, wherein it is clearly visible that the present invention achieves that the shape of the central axis (8.7) of the feed mechanism follows the shape of the central axis (8.8) of the magazine housing, whereby the conformity is achieved between the shape and dimensions of the complete feed mechanism with the shape of the inner surface of the magazine housing in which the feed mechanism is installed and performs its activity so that the bullet feeder (8.1) moves along the magazine housing without any overtight fitting or scraping.

The magazine housing, consisting of a single tube with openings at the ends of which one (9.3) is designed for insertion into the corresponding opening in the rifle and the other opening (9.4) on the other side is closed with appropriate cover, is shaped base on the criterion of consistently takin into consideration the bullet dimensions as described above, resulting in the cross section of the inner space being perpendicular to the central axis of the magazine in which the feed mechanism as well as the corresponding number of bullets are installed in a trapezoidal geometric shape wherein the joints between the sides are designed with a certain radius (6.1) and (6.2), instead of the lines usually appearing in case of a trapezoidal geometric shape, wherein the whole hosing is slightly curved with radiuses have the same bend centre (5.8) of the magazine housing and the longitudinal axial cross section in the middle of the front/narrower and rear/wider side of the housing shown in the Figure 9., showing the guides of the feed mechanism, in particular the front one (9.1 ) to be inserted into the front grooves (8.6) and the rear one to be inserted into the rear groove (10.1).

For the magazine loading and unloading procedure by feeding the bullets into the rifle receiver, a great advantage is that it is achieved by force the amount of which does not differ substantially from the initial and final stage of the magazine unloading or loading cycle.

In is clear that such favourable condition cannot be achieved only by means of one conventional spring regardless of its shape. By the very nature of things, both the magazine loading and unloading forces should preferably be smaller and, according to this invention, such preferred condition is achieved by a combination of a small spring with a series of elliptic helices with a large spring. Interconnected in a series wherein the small elliptic spring (11.1) has all helices of equal dimensions, wherein its outer dimension do not exceed the inner dimension of the diameter Do

(12.4) of the large spring.

The largest amount of force of the small spring is sufficiently lower that the smallest amount of the initial force of the large spring in its installed condition, resulting in that the loading of the bullets into the magazine and hence the pressing and shortening of the small spring has no impact on the length of the large spring bud only up to some 20% of the total number of bullets..

Upon reaching the said number of approx. 20% bullets in the magazine, the lower plate of the bullet feeder (10.12) leans against the upper plate (13.7) of the joint between the small and the large spring, in which position the small spring is fully compressed whereby the heights of the bullet bearing surface of the bullet feeder, of the first (10.4) bullet and the bearing surface of the second

(10.5) bullet become levelled with the corresponding bearings (13.2) of the bullets at the joint between the large and the small springs, at which point, by loading further bullets into the magazine the amount of force increases acting upon the large spring with its consequential shortening, whereby the sprig force develops which acts upon the existing number of ammunition in the magazine and the fact that the shapes and dimensions of helices at individual lengths of the spring are different, results in that at the very beginning, at the length L₀ (12.1) and diameter D₀ (12.4) of the large spring the helices are of a circular shape and the smallest cross section and thereafter, at the height L_mt (12.2) and the medium diameter D_mt, (12.5), the helices are of triangular shape with somewhat larger dimensions to include, at the end of the spring compression at the spring length L_t (12.3) and medium diameter D_t (12.6), the helices of also triangular shape but of a larger mid diameter D_t (12.6), with the following characteristic: the force - the length of the combined spring is more laid down and the spring force gradually increases with its compression. .

The first helix (14.1) of the large spring at the beginning of the length (12.3) is inserted into the bearing (14.3) of the lower support of the large spring, dimensioned to achieve“tight” fitting of the first helix into the bearing due to which, as well as due to the action of the fixing member (14.2) of the first helix, the first helix of the large spring is firmly fixed to the lower support..

Connection between the lower support of the large spring with the lower support of the magazine is achieved by pressing laterally the narrowest side of the lower support of the large spring, of a given thickness (14.4), at the longest side of the lower cover into a groove, the groove width (15.1) being by a required amount larger than the thickness (14.4) of the lower support and further pressure is applied up to the point when the ratchet (14.5) enters into the penetration (15.2), whereby a reliable connection of the lower support of the large spring with the lower cover of the magazine is achieved and the openings (15.3) are provided for discharge of any condensate accumulated inside the magazine..

5. Brief description of the drawings

Figure 1 A view of some relevant bullet dimensions

Position 1 .1 : Diameter of the bottom of the bullet cartridge;

Position 1 .2: Diameter at the tip of the bullet cartridge;

Position 1 .3: Total length of one bullet;

Position 1.4: Central axis of the bullet;

Position 1.5: a -angle between then tangents or the sheath of the bullet;

Position 1.6: Tangent of two most prominent points of the bullet; ;

Fig. 2 :A view of a layer of 4 adjacent bullets with the respective central axes in one plane

Position 2.1 : B_bs - Sum of the bases of 4 adjacent bullets, i.e. cartridges with their central axes lying in the same plane;

Position 2.2: B_Vs Length of the line between two tangents (2.5) touching the tips of the 4 adjacent bullet cartridges with their central axes lying in the same plane;

Position 2. 3: Lm - Total length of one bullet;;

Position 2 4: □ The angle between the tangents (2.5) along the surface area of the two end bullets;

Position 2 5: Envelops of the 4-bullet layer;

Position 2 6: Central axes of the bullets;

Position 2. 7: Bend radius of the tips of one bullet layer;

Position 2. 8: Bend radius of the bases of one bullet layer;

Position 2. 9: R_BS - Bend radius of the bases of 4 bullets in a layer;

Position 2.10: Rvs -Bend radius of the tips of 4 bullets in a layer;

Fig. 3.:A view of component parts of two adjacent columns with 6 bullets each

with the bullet central axes of each column Ivina in the corresponding planes ;

Position 3.1 : RBR - Bend radius of the bases of each column of bullets

Position 3.2: RVR - Bend radius of the tips of each column of bullets;

Position 3.3: Envelope of a part of the bullet columns;

Position 3.4: B_VR - Sum of the tip diameters of a perf of the column of adjacent bullets; Position 3.5: B_BR - Sum of the base diameters of a part of the column of adjacent bullets; Fig- 4.: A view of the“envelope” of one layer of 4 adjacent bullets with their respective central axes Ivina in one plane

Position 4.1 : Envelope as a wall of the cross section of the minimum space for

accommodation of four bullet columns in one layer

Position 4.2: Thickness of the housing wall;

Position 4.3: Outer surface of the housing and also of the magazine;

Position 4.4: Inner surface of the magazine housing;

Position 4.5: The“longer” magazine side, i.e. the side where the bullet bases are placed; Position 4.6: The‘'shorter2 magazine side, i.e. the side where the bullet tips are placed;

Fig. 5.: Iliustration of the arrangement of one bullet column in the magazine

Position 5.1 : Arch corresponding to the angle a of the circle with radius R-i connecting the bottoms (1.1) of the bullets;

Position 5.2: Arch corresponding to the angle a of the circle with radius R₂ connecting the diameters (1.2) of the bullet cartridges;

Position 5.3: Arch corresponding to the angle a of the circle with radius R₃ connecting the tips (1.3) of the bullets;

Position 5.4: Ri - Radius of the arch formed by the diameters of the bottom 1.1) of the bullets/cartridges;

Position 5.5: R₂ - Radius of the arch formed by the diameters (1.2) at the tips of the bullet cartridges;

Position 5.6: R₃ - Radius of the arch connecting the tips (1.3) of the bullets;

Position 5.7: a - Angle corresponding to the length of the arches (5,1), 5.2) and (5.3);

Position 5.8: Centre of all bend radiuses of the magazine housing;

Fig. 6.: A View of the diameters of cross sections of the housing of a particular magazine

Position 6.1 : Geometric shape formed by the bullet envelopes in the planes perpendicular to the central axis of the magazine in the adapter (7.1) zone segment

Position 6.2: Geometric shape formed by the bullet envelopes in the planes perpendicular to the central axis of the magazine in the segments (7.2) and (7.3);

Fig. 7.: A view of the magazine segments

Position 7.1 a - Adapters zone of the magazine;

Position 7.2 b - Transit segment of the segment;

Position 7.3 c - Space for bullets, i.e. magazine storage;;

Position 7.4: d - Space occupied by the springs when the magazine is fully loaded with bullets;

Position 7.5: Bullet columns within the magazine;

Position 7.6: Bullet layers within the magazine;

Position 7.7: Width of the adapter (7.1) zone of the magazine.

Fig.8.: A view of the feed mechanism

Position 8.1 : Bullet feeder;

Position 8.2: Small spring;

Position 8.3: Large spring;

Position 8.4: Joint between the small and the large spring;

Position 8.5: Lower support of the large spring;

Position 8,6: Front grooves for the front (9.1) guide of the magazine housing;

Position 8.7: Central axis of the feed mechanism;

Position 8.8: Central axis of the magazine housing;

Position 8.9: Front side of the magazine; Position 8.10: Rear side of the magazine;

Fig. 9.: A view of the longitudinal axial cross section of the single magazine housing in the mid part of the front/narrower and rear/wider side of the housing

Position 9.1 : Front guide for the front grooves (8.6) of the feed mechanism;

Position 9.2: Rear guide for rear grooves;;

Position 9.3: Opening for insertion into the corresponding opening in the rifle;;

Position 9.4: Opening closed with a cover;

Fig. 10: A view of the bullet feeder

Position 10.1 : Front groove in the bullet feeder;

Position 10.2: TM of the small spring;;

Position 10.3: Rear part of the bullet feeder with the rear groove (10.11);

Position 10.4: Bearing surface of the first bullet;

Position 10.5: Bearing surface of the second bullet;

Position 10.6: Ri , R2 , bend radiuses of the feeder TM;

Position 10.7: Width of the bullet feeder on the rear side;

Position 10.8: Width of the bullet feeder on the front side;

Position 10.9: Feed mechanism course limit switch;

Position 10.10: Bend radius of the small spring TM;

Position 10.12: Lower feeder surface leaning against the upper surface (13.7) of the joint between the large and small spring;

Fig. 1 1.: A view of the small spring

Position 11.1: Shape of the spring coil;

Fig. 12 A view of the large spring

Position 12.1 : U - Length of the round coil spring, .

Position 12.2: L_mt. Length of the small trapezoidal coil spring;

Position 12.3: L_t - Length of the trapezoidal coil spring

Position 12.5: Shape of the coil spring over the length 12,2;

Position 12.6: Shape of the coil spring over the length 12.3;

Fig. 13.: A view of the joint between the large and small spring

Position 13.1 : Large spring TM;

Position 13.2: Bullet bearings upon activation of the large spring;

Position 13.3: Passage width on the rear side of the bullet feeder (10.7);

Position 13.4: Passage width on the front side of the bullet feeder (10.8);

Position 13.5: R - Bend radius of the large spring TM;

Position 13.6: Groove on the front side of the joint between the large and small spring; Position 13.7: Upper surface of the joint between the large and small spring against which the lower surface (10.12) of the bullet feeder leans;

Fig. 14.: A view of the lower support of the large spring

Position 14.1 : The first coil of the large spring;;

Position 14.2: Fixing member of the first coli of the large spring;

Position 14.3: Bearing of the first coil of the large spring;

Position 14.4: Thickness of the lower bearing plate of the large spring;

Position 14.5: Ratchet entering into the penetration (15.2) against radial shift of the lower support of the large spring in respect of the lower magazine cover;

Fig. 15.: A view of the lower magazine cover

Position 15.1 : Thickness of the groove for the lower support plate of the large spring (14.4); Position 15.2: Penetration for the ratchet (14.5): Position ib.^'J: Openings for condensate discharge.

Fig. 16.: A view of the empty magazine

Fig. 17.: A view of the magazine with occupied 25 % of the bullet holding capacity Fig. 18.: A view of the magazine with occupied 100 % of the bullet holding capacity

6. Description of one method for realisation of the invention

The invention is realised by using the technical and technological procedures known for many decades if not centuries, including the procedures comprising certain specificities relating to the manufacture of ammunition magazines, wherein for this invention to be realised certain specific technological possibilities and experience in individual technical fields are required.

Apart from the realisation of this invention by applying traditional technological procedures, according to this invention, the plastics injection technology is also used with exceptionally high requirements in respect of complex shapes of the component parts, in particular the magazine housing.

7. Industrial or other applications of the invention

In general, the present invention is traditionally applied in the manufacture of firearm ammunition magazines with a wide range of ammunition types and calibres.

The technical solution of a magazine according to this invention can be used for a wide range of the exiting rifle types, concepts and designs covered by the firearm ammunition product range, where it is necessary, of course, to implement feasible adaptations in order to achieve perfect magazine insertion into the corresponding opening of the rifle.

Claims

1 . A high capacity ammunition magazine capable of receiving a large number of bullets which can be placed inside the magazine housing, consistently shaped and sized taking into account the bullet dimensions, characterised in that the bullets are arranged in the magazine housing so that all the three circles of corresponding bend radiuses of the magazine, in particular the radius R1 (5.1) of the circle connecting the bottoms (1 1) of the bullets/cartridges, radius R2, (5.2) of the circle connecting the diameters (1.2) at the tip of the bullet cartridge, as well as the R3 (5.3) of the circle connecting the tips (1.3) of the bullets, have the same centre.

2. A high capacity ammunition magazine according to Claim 1 , characterised in that all the three circles with the corresponding bend radiuses R1 (5.1), R2, (5.2) and R3 (5.3) of the magazine housing have the same centre (5.8).

3. A high capacity ammunition magazine according to preceding Claims, characterised in that the amount of the angle a (5.7), corresponding to the number of bullets inside the magazine housing, determines the segments of the circles or the corresponding arches of the circles of the magazine housing bend radiuses, i.e. the radius RT (5.1), radius R₂ (5.2), radius R₃ (5.3) ranging within the arch span at the angle a (5.7).

4. A high capacity ammunition magazine according to preceding Claims, characterised in that the housing of the magazine takes the form of a single tube of corresponding bend radiuses R_{1 f} (5.4), R₂, (5 5), R₃, (5.6), wherein each bend radius belongs to the corresponding circle, all circles having the same centre (5.8), and the arch segments of all these circles correspond to the angle a (5.7), and is made, apart from other suitable materials, of plastics of adequate properties, using the injection methods..

5. A high capacity ammunition magazine according to preceding Claims, characterised in that the shape and dimensions of the volume being the space inside the magazine housing derive from a corresponding number of bullets arranged in layers as well as in columns, wherein the bullets are arranged adjacent to each other with their respective central axes (2.6) lying in the same place and their envelopes touch each other.

6. A high capacity ammunition magazine according to preceding Claims, characterised in that the envelope of one or more bullets on the lateral side is formed by the straight lines (2.5), parallel to the centres of the bullet axes, also being the tangents along one or, in case of two or more bullets, wherein in addition to the straight lines (2.5) component parts of the envelopes are also the bend radiuses of the bases R_B, (2.8), or (3.1), and tips R_v, (2 7) or (3.2).

7. A high capacity ammunition magazine according to Claim 1 , characterised in that the “envelope” (4.1 ) of four bullets is in one layer, wherein the space enclosed by the inner surface (4.4) of the magazine housing is increased for a certain amount in respect of the space within the envelope (4.1 ), ensuring the accommodation and smooth movement of the bullets within the space of the inner surface (4.4), so that taking into account also the thickness of the wall (4.2) of the housing, follows the amount of the outer surface (4.3) of the magazine which can be also taken as the outer dimension of the magazine cross section.

8. A high capacity ammunition magazine according to preceding Claims, characterised in that when a certain number of bullets are arranged adjacent to each other in a column or a layer with their central axes lying in the same plane, the outer contours of the bullets so arranged, assume the shape (6.1) and (6.2) being the geometric shape of a trapezoid, wherein the joints between its sides, instead with the lines as is usually the case with the geometric shape of a trapezoid, are achieved with certain radius, thanks to which the cross sections perpendicular to the central axis of the magazine have the trapezoid shape virtually over its whole length.

9. A high capacity ammunition magazine according to preceding Claims, characterised in that that the adjacent bullet envelopes, such as (2.5) and (3.3) and (4.1 ) inside the magazine are tangential to each and the same angle a (5.7) determines the arches as segments of the circle with radius R-_t (5.1) connecting the bottoms (1.1) of the bullets /cartridge and the arches as segments of the circle with radius R₂ (5.2), connecting the diameters (12) at the tip of the bullet cartridge as well as a part of the arches being the segments of the circle with the radius R₃ (5.3) connecting the tips (1.3) of the bullets, wherein all bend radiuses of the magazine housing have the same centre (5.8) over the entire span of the arch corresponding to the angle a.

10. A high capacity ammunition magazine according to preceding Claims, characterised in that the feed mechanism consists of the bullet feeder (8.1), a small spring (8.2), a large spring (8.3), a joint (8.4) between the small and large spring and the lower support (8.5) and lower cover (8.6) of the magazine, wherein the shape of the central axis (8.7) of the feed mechanism follows the shape of the central axis (8.8) of the magazine housing. 1 A high capacity ammunition magazine according to preceding Claims, characterised in that the propulsion force of the feed mechanism is provided by a combination of a small spring with a series of elliptic helices with a large spring interconnected in a series wherein the small elliptic spring (1 1.1) has all helices of equal dimensions, wherein its outer dimensions do not exceed the smallest inner dimension of the diameter D₀ (12.4) of the large spring, wherein the largest amount of the force of the small spring is significantly smaller that the smallest amount of the force of the large spring, resulting in that the feeding of bullets into the magazine and hence the compression and shortening of the small spring has no impact on the length of the large spring up to some 20% of the total number of bullets.

12. A high capacity ammunition magazine according to preceding Claims, characterised in that after having reached the above mentioned number corresponding to approx. 20% of the bullets in the magazine housing, the full compression of the small spring takes place when pressure starts to be exerted on the large spring causing its shortening, when the spring force is developed acting upon the existing number of ammunition in the magazine, wherein the shapes and dimensions of helices at individual lengths of the spring are different, which results in that at the very beginning, at the length L₀ (12.1) and the helix diameter D₀ (12.4) of the large spring the helices are of a circular shape and the smallest diameter and thereafter, at the height L_mt (12.2) and the medium diameter D_mt, (12.5), the helices are of triangular shape with somewhat larger dimensions to include, at the end of the spring compression at the spring length L_t (12.3) and medium diameter D_t (12.6).

13. A high capacity ammunition magazine according to preceding Claims, characterised in that the first helix (14.1 ) of the large spring at the beginning of the length (12.3) is inserted into the bearing (14.3) of the lower support of the large spring, dimensioned to achieve “tight" fitting of the first helix into the bearing due to which, as well as due to the action of the fixing member (14.2) of the first helix, the first helix of the large spring is firmly fixed to the lower support.

14. A high capacity ammunition magazine according to preceding Claims, characterised in that the connection between the lower support of the large spring with the lower support of the magazine is achieved by pressing laterally the narrowest side of the lower support of the large spring, of a given thickness (14.4), at the longest side of the lower cover into a groove, the groove width 15.1) being by a required amount larger than the thickness (14.4) of the lower support and further pressure is applied up to the point when the ratchet (14.5) enters into the penetration (15.2) and the openings (15.3) are provided for discharge of any condensate accumulated inside the magazine.