DE2058888A1 - Pinchhole bullet volley - Google Patents

Description

PATENT LANWXtIE

dk.-ing. if. f: ncke

DlPL-ING. H. BOHR

WPL-ING S.STAEöeR 1 fl NOV 1970

COLT'S INC MONKS 5 ^ " ^NUV · ^{Ia / U}

MOLLERSTR. M.

Connecticut USA

QUETSGHBOHRUNGSGESGH0SSAL7E

Priority: USA No. 883.013
Patent application dated December 8, 1969

The present invention generally relates to [Ammunition for firearms with pinch bores and in particular on the production of improved pinch bore ammunition, whereby when a single shot is fired a projectile unit in .a volley of bullets disintegrates.

As in Russell U.S. Patent No. 3,450,050 S. Robinson, which invention was transferred to the applicant of the present invention, are rifles with Pinch hole known in technology. They are in general characterized by a rifle barrel whose bore on the breech has a larger diameter than on the Muzzle j such a barrel can be drawn or smooth, the shape of the barrel can also be different. Ammunition for such firearms are also known and various projectiles having various shapes have been made to date related, including the bullets of the aforementioned Robinson Patent which first proposed a projectile unit composed of a plurality of specifically shaped projectiles is to be produced, with each projectile resting feet on the following projectile so as to interact with the side wall of the pinch hole behind the unit, to create a sealed cavity to allow the bullets to separate while the barrel is traversing.

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It is an object of the "present invention" to provide an improved one To produce pinch hole projectile unit in which the projectiles all have a simple shape so that a Separation of the projectiles while crossing the pinch, bore, without the use of "tools" between the different Shot like for example compressed liquids, or gases, or the like is possible.

It is another object of the invention to provide a cartridge for pinchhole projectile units to make available in which the floors are easily and safely connected to each other can and where the bullet unit is securely fastened in the cartridge without any adverse effect on the bullet separation, Furthermore, normal handling of the cartridge is possible without projectiles being able to accidentally separate; This also includes the manufacture of a floor unit

; which the bullet lying at the tip during the passage : the pinch hole is crossed.

! It is yet another object of the invention to provide a pinch hole > to produce a floor unit where at least one of the ; shot is designed as a tracer bullet, its function differs from the function of the other projectiles without affecting the effect of the projectile unit.

i
It is yet another example of the invention to manufacture a cartridge for pinch hole projectile units at a low cost which can be manufactured by modern manufacturing and assembly processes, the unit thus produced being stored and handled under normal conditions like other common ammunition.

These and other objects of the invention, as well as the advantages, properties and contexts of the invention will be more readily understood when reference is made to the following Description and drawings illustrating examples of the invention.

Figure 1 int a plan view of an ordinary flaschinen-

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gun barrel. .at., which the front, upper section has broken away is which barrel was modified and a pinch hole part having at the mouth;

FIG. 2 is a top plan view of a pinch bore cartridge of FIG present invention in which the upper section is broken away was made to show the details of the cartridge;

FIG. 3 is a cross section taken along line 3-3 of FIG which shows the details of the projectile unit;

Figure 4- is a cross-sectional view taken along line 4-4 of Figure 3;

Figure 5 is an enlarged, partial cross-section of the projectile portion which is represented in Figure 3 by the line 5-5;

FIG. 6 is a schematic cross section showing the projectiles emerging from the pinch bore of the gun barrel of FIG shows;

, Figure 7 is a cross section of another example of one Floor unit;

Figure 8 shows another example of a projectile unit with modified bullet shape;

FIG. 9 is a cross-section of a projectile of the unit of FIG Figure 8 after launch;

FIG. 10 is a partial cross-sectional view of another example of FIG Invention; and

Figure 11 is a cross-section of a single projectile of Figure 10 after launch.

The barrel 10 shown in Figure 1 consists of a normal one Running part of shortened length and a pinch bore running part 12 together, which are held together by the rotating handle 13. Part 11 can be a normal .50 caliber the barrel, the mouth of which was removed in order to attach the pinch bore part 12 to the part that was left in this way.

1 0 9 8 2 A / 1 2 3 7

In the example, the entry caliber 14 at the beginning of the pinch-boning barrel part 12 is caliber 50, the diameter of the barrel in this part decreasing conically after point 15 and the desired end caliber at point 15, in this case caliber .30; This is followed by a straight barrel part between 15 and the mouth 16. The rotation (not shown!) And other normal properties of a standard .50 caliber barrel can be retained in the barrel part 11, whereas the conical barrel part 17 can be kept smooth in order to compensate for a change in the spin speed of the projectiles, which change due to the smaller diameter of run 17 is conditional. The barrel 10 was only described for a better understanding of the invention; it is pointed out that any pinch bore barrel j can be used in conjunction with a projectile unit of the invention .

In Figure 2 , the cartridge 20 is shown and this cartridge comprises a common .50 caliber cartridge case 21 with a normal igniter 22 and a normal powder charge 23. If desired, the projectile unit 25 can be selected so that its mass is generally that of one an ordinary • 50 caliber bullet. A preferred example of a projectile unit of the present invention is shown in enlarged cross section in FIG. The pinch bore projectile assembly 25 comprises five, generally identical, conically shaped projectiles 26, each at the trailing edge with one of the surface 26b coaxial and the same! Conical recess 26a having apex angles is provided. Or in other words, jj ^ecl it has a basement ^! Hollow body structure with a conical outer surface and a coaxial, conical inner surface, so that the outer I surface 28 of each floor lies against the entire length of the inner surface 29 of the floor lying on the floor. : From, Figure 4 shows that the outer diameter of the outward. The lower edge of each bullet in the preferred example has a diameter "D" of .50 caliber and this portion also has a plurality of grooves 30 extending lengthways across the flat portion 31 of each bullet

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drag on. Above the projectile unit there is a plastic film 32 which extends over the first projectile 33 and extends along the unit to the rear surface 35 of the last floor; the grooves 30 are used to To better distribute plastic during the sheathing and to produce a structure that is continuous in length. It will assumed that these races also contribute to the spin speed, which is caused by the drawn barrel, easier to transfer to the projectile unit. An annular one Kille 40 is located in the plastic casing to make the installation of the projectile unit in the cartridge case easier, by forming a recess into which the upper part of the cartridge case is pressed, the plastic actually has no influence on the storey separation, so the selection of the plastic is not critical, but Mylon is preferred.

As it traverses the barrel, the outer diameter of each bullet changes from .5Q caliber to the final .30 caliber downsized; It is therefore important that at least the rear section, which is denoted by the number 4-5, consists of a deformable or fragile material exists to allow a reduction in diameter. It was found, that bullets made of copper deform sufficiently and excessive wear and tear on the barrel of the pinch bore avoid so that they can be used well as projectiles of this type. However, other materials can also be used needed, this only depends on the specific application of the bullet.

With reference to FIGS. 5 and 6, it can also be stated that the pinch bore part of the barrel performs the same function as the pinch bore barrel of the Robinson patent already mentioned; here, too, the outer diameter of the projectiles is reduced, the projectiles are lengthened somewhat. and separated so that 5 discontinuously separated projectiles emerge at the mouth 16. The specific procedures involved in separating the projectiles of the present invention 'are not yet fully understood * but it is believed'

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that the surfaces 28 and 29 of each projectile relative to one another by the compressive forces of the conical barrel part be moved because there is no liquid or other means to drive the projectile between 2 floors. The angle of the conical recess (and the conical shape of the Tips) must be selected in such a way that the bullets are not wedged due to friction. It was found that an angle of about 30 fulfills this condition. To a Wedging of the basement floors due to sliding friction between the contacting, conical surfaces of the floors is to be avoided it / advantageous (as shown schematically in Figure 5) a thin film 41 of a lubricant such as a A film of soap, an oxide film, or another film

"Apply lubricant in a thin layer to keep the To facilitate separation of the projectiles, whereby the lubricant can also be applied as a coating to the projectiles. As can be seen from Figure 6, the shape of the tip A of each bullet is not changed, although the diameter of the rear part B is gradually reduced through the pinch hole of the barrel, with the projectiles in the pinch hole part of the barrel are separated from each other so that they ■ emerge as separate, hollow balls of caliber .30. In In another example, shown in Figure 7, the projectile unit 60 is generally identical to that of Figure 3> it also includes a plastic sheet 61 which holds the unit together.

| holds, several floors 62 and a recess 63 in the film 61 to facilitate clamping of the cartridge case. In this example, however, the last floor 66 is exposed a body 67 to which a deformable or fragile strip 68 is attached, so that this is externally resembles a projectile in front of it. The way in which the strip 68 is fastened to the body 67 is not relevant to this invention important, the same applies to the material that is used for this bar, because this bar only serves as a gas seal for one. Drive means and must be deformed or broken when traversing the pinch bore barrel part. The body 67 is made of a harder material, has, on the upper part, a conical shape to ensure separation from the projectile in front of it and has a recess 70 in which,

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for example, a tracer mixture that can be ignited by the launcher can be introduced. Such a combination can also be used with an armored projectile, the body of which has a certain diameter, which is provided with a bar in order to form the desired gas seal. It should be noted that the specific configuration of the gas seal and the material from which it is made does not form part of the present invention, it may too;
will.

can for example be related to a fragile plastic mass' ¹ "

To the difference in function contained in the ^ unit A storey 75 can be used to represent storeys one identical to the copper bullet in the previous example Configuration also made of another material, such as mild steel, and built into the unit will.

FIG. 7 is an extension of the dashed line 79 Plastic coating 61 shown over the first floor «Here The length and shape of such plastic expansion are not critical, but it has been found that such a plastic mass is very useful, as it during traverses the holds the first projectile coaxial with the barrel.

To further describe the variety of bullet shapes that may be used in connection with the subpoenaing invention Reference is made to Figure 8 in which the interior surfaces of recess 80a of each bullet completely encompass the surface 81 of the subsequent projectile, so that the resulting projectile unit has a pointed headpiece and a continuous., body. Such floor units can be easily held together, as if for a bit with a light film of oil or wax and were made with Success through a barrel of the type described, as shown in Figure 1, fired, with the same dtnmg of the projectiles, as in the example of Figure 3, was achieved and the individual floors had the shape shown in Figure 9 «

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Another example of a floor configuration is shown in FIG shown. Each bullet 90 has a conical tip 91 a cylindrical body 92; a conical recess 93 holds the tip of the subsequent 'bullet.' One in the heat shrinking plastic mass 95 which is located on the cylinder edge 96 up to the rear cylinder edge 97 holds the unit together. A launch through the barrel of the figure draws a separation of the projectiles, as in the previous ones Examples, according to; wherein the cross-section of the resulting projectiles after launching has the shape shown in FIG. From this description of the projectile units of the figures

fe 8 and 10 shows that it is possible to use projectiles without To use the spaces between the following storeys or between the storeys and the barrel, the desired separation of the projectiles is achieved as long as the angle of the front part (and the angle of the Recess) should be chosen so that there is wedging due to friction or pressure while crossing the Pinch boring of the barrel is prevented. It became during trials found that the plastic material which the gaps between the projectiles of the example of the figure and the figure 7 and the tip of the projectile of the example of the Figure 7 covered, usually presented as small plastic pieces or rings after the experiment. It is important to

P indicated that the recess 50 in FIG. 3j is the recess 78 in FIG. 7 and the recesses 83 and 94 in the figures and 10 are only caused by the manufacturing process and have no function in separating the basement floors.

From the present description it can be seen that a pinch bore projectile unit can be manufactured easily and at low cost and that basement floors can be combined to increase the firepower of an easily alterable normal weapon and that it is possible to have several projectiles in one projectile unit can perform various functions. _:

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Claims (13)

Claims Projectile unit marked for pinch hole firearms by several projectiles (26, 62, 80, 90) which are arranged coaxially to one another, the tip (28, 81, 91) one Projectile (26, 62, 80, 90) in a conical recess (26a) of the projectile in front of it (26, 62, 80, 90), the Side wall of the recess (26a) of the first floor (26, 62, 80, 9Q) on the outer wall of the top of the next floor (26, 62, 80, 90) rests axially over the entire length of the recess (26a) and at least the diameter of the rear part (29) said projectile (26, 62, 80, 90) can be reduced when traversing the pinch bore (17) of the firearm. 2. Projectile unit according to claim 1, characterized in that that said back file (29) of each projectile (26, 62, 80, 90) along its entire length on the side walls rests against the bore of the rifle barrel. " 3. Projectile unit according to claims 1-2, characterized in that a lubricant (41 ) is attached between the touching side walls of subsequent projectiles (26, 62, 80, 90). 4. ßeschußeinheit according to claims 1-3 » characterized in that means (32, 61, 95) are provided to hold the projectile unit (25, 60) together, said means (32 _t 61, 95) in the pinch hole (12) the firearm (10) can be separated from said projectiles (26, 62, 80, 90) . 5. Projectile unit according to claims 1 ^, characterized in that said means (32, 61, 95) consist of a plastic film. 6 · GeeehoBeeinhöit according to patent claims 1-5 »thereby (characterized in that the last projectile (26) consists of a body (67) cLesoen diameter the final diameter after crossing the Bureh corresponds to the pinch hole (1?) and one on this Body (67) assembled as a seal attached bar (68), 108824/1237 - ίο - the outer diameter of this strip (68) on the whole Length of the bore of the firearm (10) rests on the outer wall of this bore. 7. Projectile unit according to claim 6, characterized in that the hollow rear part (70) of the body (67) is pyrotechnic Contains means to generate a tracer. 8. Projectile unit according to claims 1-7 * characterized in that said projectiles (26, 62, 80, 90) a have a conical shape and are provided with a conical recess (26a) in which the subsequent projectiles (26, 62, 80, 90). 9 · Projectile unit according to claims 1-8, characterized in that means (79) for guiding the first projectile (62) are mounted on the projectile unit (60) around said first projectile (62) coaxial with the axis of the firearm barrel (10) to hold during the crossing. 10. Projectile unit according to claim 9 »characterized in that that said guide means (79) extends over the rear part of the first projectile (62) and is firmly attached rests against the bore of the barrel. 11. Projectile unit according to claim 1, characterized in that that the diameter of each bullet (26, 62, w 80, 90) is reduced in size by deforming the rear part of the projectile (26, 62, 80, 90). 12. Cartridge for firearms which comprises a projectile unit according to claims 1-11, characterized in that a hille running around the circumference of the projectile unit (40, 63) is attached in the plastic film (32, 61, 95), in gave way to the upper part of the cartridge case (21), which comprises at least part of the projectile unit (25, 60), is pressed in around the projectile unit (25 »60) with the Cartridge case (21) to be connected 13. Projectile unit according to claims 1-11, characterized characterized in that said projectiles (26, 62, 80, 90) are in 109824/1237 the longitudinal direction extending grooves (30) have the one allow better distribution and thus a better connection of the plastic compound (32, 61, 95). MTaKTANWXLTl MMNO. H. FINCKE, DIPL.-ΙΝΘ. H. MHW 109824/1237