RU2585092C1 - Cartridge case for small arms cartridges - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: invention relates to ammunition, particularly, to capsulated cases. Cartridge case consists of case and pressed into it of a detonating cap of “Berdan” consisting of metal cap with pressed into it with ignition compound impact action with a sealing membrane. Anvil sleeve is made such that top sleeve height of anvil is recessed in capsular seat relative to end cap sleeve by a value of maximum height of priming composition with sealing membrane considering allowance, plus value of wall thickness metal cap and plus value specified on cartridge at recess detonating cap of “Berdan” relative to end cap sleeve considering allowance. Value of depth of a capsule seat equals height of metal cap considering allowance plus value specified on cartridge at recess detonating cap of “Berdan” relative to end cap sleeve considering allowance.

EFFECT: higher reliability and sensitivity of operation of detonating cap.

1 cl, 1 dwg

Description

The invention relates to the production of encapsulated cartridges for civilian, service and military cartridges for small arms and rifled small arms and can be used for the production of these cartridges (from pistol cartridges to bullets for large-caliber machine guns and cartridges for rifled and smooth-bore hunting rifles).

The well-known metal sleeve GOST 7921-86 for a cartridge for smooth-bore weapons under the TsBO-N igniter capsule in accordance with GOST 7574-71 of the Berdan type, which is commercially available at the Novosibirsk Metallurgical Plant Spark in Novosibirsk and when encapsulated by the TsBO primer -N according to GOST 7574-71 type "Berdan" formed encapsulated sleeve. This encapsulated sleeve is taken as an analogue.

A well-known metal sleeve for a cartridge for small arms under the Berdan type igniter capsule according to GOST B 23241, which is commercially available at the Iskra NMZ OJSC in Novosibirsk and the Murom Instrument-Making Plant JSC and when encapsulated with a type igniter capsule "Berdan" according to GOST B 23241-91 formed encapsulated sleeve. This encapsulated sleeve is taken as a prototype.

The design of the encapsulated sleeve, known by the prototype, does not provide high reliability and sensitivity of operation of the Berdan type igniter capsule due to the lack of the minimum possible approximation of the anvil of the sleeve to the sealing membrane, which covers the shock-ignition composition of the igniter capsule. The reason for this is the large tolerance on the height of the cap of the Berdan type primer. For example, when the height of the cap of the KV-27 “B” igniter capsule is 2.92 mm, the tolerance on the “B” height is 0.37 mm. For this igniter capsule, the height of the pressurization of the igniter composition together with the sealing membrane (VZS) “C” is 1.32 mm with a tolerance on the height “c” of 0.13 mm. With a cap height of KV-24 “B” igniter, 2.65 mm, the tolerance on height “B” is 0.3 mm. For this igniter capsule, the insertion height of the igniter composition “C” is 1.4 mm with a tolerance on the height “c” of 0.1 mm. With the height of the cap of the KV-16 “B” igniter capsule 2.7 mm, the tolerance for the height “B” is 0.35 mm. For this igniter capsule, the insertion height of the igniter composition “C” is 1.47 mm with a tolerance on the height “c” of 0.12 mm. When the height of the cap of the KV-10 igniter capsule “B” is 2.4 mm, the tolerance on the height “B” is 0.3 mm.

With such large tolerances on the height of the metal cap, if you do not introduce requirements for the depth of the capsule socket of the sleeve and the height of the anvil of the sleeve, a large gap inevitably arises between the tip of the anvil of the sleeve and the membrane that seals the shock-ignition composition of the Berdan type igniter capsule. In this case, the striking of the weapon, it is necessary to bend the end of the cap to such a value to select this large gap. This circumstance increases the time from the moment of striking the striker to the operation of the igniter capsule. The reliability of the operation of the igniter capsule and its sensitivity are reduced. The decrease in the reliability of the operation of the igniter capsule in such capsule shells is also associated with the insufficient strength of the war springs of some smooth-bore and rifled weapons.

The objective of the invention is to design a capsule shell for a rifled weapon with a Berdan type igniter capsule, which provides higher reliability and response sensitivity of the igniter capsule, and also reduces the time from the moment the striker hits the igniter capsule until the igniter capsule operates providing the smallest possible distance from the top of the anvil to the sealing membrane on the ignition composition of the shock.

The problem is solved in that in the design of the encapsulated sleeve for small arms cartridges, consisting of a sleeve and a Berdan-type igniter capsule pressed into it, consisting of a metal cap with an ignition composition pressed into it, coated with a sealing membrane, the tip of the anvil sleeve deepened in the capsule socket of the sleeve relative to the end of the cap of the sleeve by a value of "D" equal to the value of "C" of the maximum height of the ignition composition of the shock a sealing membrane, plus the size of the wall thickness of the metal cap and plus the value of "N" specified on the cartridge recess of the Berdan type igniter capsule relative to the end of the sleeve cap, while the value "A" of the depth of the capsule socket is equal to the value "B" of the height of the metal cap, taking into account the tolerance plus the value "H", set on the cartridge for the recess of the capsule-igniter type "Berdan" relative to the end of the cap sleeve. Those. two formulas should be fulfilled: “A” = “B” + “H” and “D” = “C” + “H”.

In cases where the design of the sleeve is made in such a way that the inequalities occur simultaneously or one at a time:

“A” ≥ “B” + “H” and “D” ≥ “C” + “H” unreasonably remove the anvil liner from the sealing membrane and the inflammatory composition of the shock action of the Berdan type igniter capsule, which reduces the reliability of the capsule igniter and its sensitivity.

The predetermined “H” value of the recess of the Berdan type igniter capsule relative to the end of the sleeve cap is determined by the design of the weapon for which the cartridge is intended, and is associated with the impact on the encapsulated sleeve in the composition of the inertial prick cartridge with a weapon striker. The need to deepen the Berdan type igniter capsule in the sleeve nest is also justified by GOST B 23241.

The drawing shows the proposed encapsulated sleeve for small arms.

The encapsulated sleeve according to the invention consists of: sleeve - 1; anvil liners - 2; capsule nests - 3; metal cap - 4; igniter composition of shock action - 5; sealing membrane - 6.

The implementation of the encapsulated sleeve according to the invention improves the reliability of operation of the igniter capsule, increases the sensitivity and stability of operation of the igniter capsule in the composition of the liner.

It is important to note that the same statements can be made for a metal encapsulated sleeve; we obtain when the ignitor capsule TSBO-N according to GOST 7574-71 is pressed into a metal sleeve according to GOST 7921-86. Therefore, making the same changes in the design of the capsule sleeve, known by analogy as in the sleeve known according to the invention, presented in the figure, we obtain an increase in the reliability of operation of the igniter capsule, the sensitivity and stability of operation of the capsule igniter in the composition of the metal sleeve according to GOST 7921-86.

Currently, drawings have been developed for the proposed versions of the encapsulated sleeve for small arms and preparations are being made for the production of such encapsulated shells, which should increase the manufacturability and quality of cartridges for small arms.

Claims (1)

The encapsulated sleeve for cartridges of small arms and rifled weapons, consisting of a sleeve and a Berdan-type igniter capsule pressed into it, consisting of a metal cap with an ignition composition pressed into it, coated with a sealing membrane, characterized in that the anvil the height that the tip of the anvil of the sleeve is deepened in the capsular socket relative to the end of the sleeve of the sleeve by a value of "D" equal to the value of "C" of the maximum height of the ignition insulating composition with a sealing membrane, taking into account the tolerance, plus the size of the wall thickness of the metal cap and plus the value of "N" set on the cartridge for the recesses of the Berdan type igniter capsule relative to the end of the sleeve cap, taking into account the tolerance, while the value of "A" the depth of the capsule socket is equal to the value “B” of the height of the metal cap, taking into account the tolerance, plus the value “N” set on the cartridge for the recesses of the Berdan type igniter capsule relative to the end of the sleeve cap, taking into account the tolerance, i.e. the following formulas must be satisfied: “A” = “B” + “H” and “D” = “C” + “H”.

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