EP1585934A1

EP1585934A1 - Unit shell

Info

Publication number: EP1585934A1
Application number: EP04701711A
Authority: EP
Inventors: Karl-Axel Roheim
Original assignee: Roheim System
Current assignee: Roheim System
Priority date: 2003-01-23
Filing date: 2004-01-13
Publication date: 2005-10-19
Also published as: WO2004065890A1; SE522122C2; SE0300164L; SE0300164D0

Abstract

A unit shell is inserted from the back of the barrel when loading a weapon and includes a driving charge (13) and has in its end a detonator (5) firing the driving charge and includes also an action part (4). A thrust plate (3) is arranged to push the action part (4) out of the barrel and the driving charge (13) thus acts on the end of the thrust plate (3) which is opposite to the action part. The driving charge (13) is placed in a cartridge part (1), the detonator (5) being fitted in its bottom. The cartridge part (1) is detachably connected to the thrust plate (3) by means of a connecting pipe (8), which includes the charge (17) and is connected with the detonator (5). There is a connection between the inside of the connection pipe (8) and the driving charge (13) in the cartridge part (1) as well as there is a connection between the connection part (8) and detachable attachment (11) between the action part (4) and the thrust plate (3), which attachment (11) is detached by the firing of the charge (17).

Description

UNIT SHELL

This invention relates to a unit shell which is inserted from the back end of a barrel of a weapon when loading the weapon, which unit shell has a driving loading and in one end a detonator for firing the driving loading and also includes an action part.

The object of the invention is to obtain a shell design, which is easy to handle and safe and which design in a simple way can be applied to different known shells where the action part remains unchanged.

The unit shell is therefore' characterized according to en- closed claims.

The enclosed drawing is a longitudinal section of the under part of the unit shell according to the invention when it is inserted in a barrel.

Thus, the enclosed drawing shows the under part of the barrel which also is the part where the unit shell is inserted.

The unit shell can be said to consist of two parts. The upper part according to the drawing is designated as the action part 4 and it is thus the part which is fired at a target and forms the attack on the target. The under part of the unit shell includes a thrust plate 3 and a cartridge part 1. The upper end 2 of the cartridge part 1 is loosely attached to the under side of the thrust plate 3. The under part of the cartridge part 1 has a bottom 16 which as known fits into a seat in the barrel so that the cartridge part is fixed against running out of the barrel 14 in the same direction as the one for the ac- tion part. An ignition screw 6 is inserted in the centre of the bottom 16, which ignition screw has a detonator 5 at its end. The ignition screw is formed with an axial hole 7 which means that the action of the detonator will pass through the ignition screw 6 upwards in the figure.

The cartridge part 1 is connected with the under side of the thrust plate 3 by means of a connection pipe 8. This connection pipe 8 contains a first charge 17. The first charge 17 can thus be ignited by the detonator 5 via the channel 7. The connection pipe 8 is attached to the thrust plate 3 and to the ignition screw 6 by means of threads or force fit.

The action part 4 is attached to the upper side of the thrust plate 3 by means of a releasable attachment 11. The attachment can consist of a pin 19 on the upper side of the thrust plate 3, which pin attaches to a sleeve 20 of the action part 4. In order to release the connection between the pin 19 and the sleeve 20 there is a channel 10 through the thrust plate 3, which channel is connected to the first charge 17 in the connection pipe 8 and when the first charge 17 takes fire a blast wave will be created, which passes through the channel 10 and so to say blasts the connection between the parts 11 and 20 loosely. Different designs of the parts 11 and 20 are possible in order to create the releasable connection. The action part 4 shall thus be released from the thrust plate 3 when firing the unit shell. The thrust plate 3 then pushes the action part out of the barrel.

The connection pipe 8 further has disconnecting means 18, which as shown consists of a weak area of the pipe. The object is to cause the connecting action of the connection pipe 'to fail so that the strength of the pipe which keeps the thrust plate and the cartridge part together will be eliminated. A driving charge 13 is arranged in the space around the connection pipe 8 within the cartridge part 1. This driving charge 13 is ignited by that the connection pipe 8 has several holes in its cylindrical wall and the driving charge is ignited through these holes as soon as the charge 17 has been fired by the detonator 5. The driving charge 13 may consist of gun powder mass or discs formed by gun powder, which have a central hole so that the discs can be placed above each other within the cartridge part 1 having the connection pipe going through the central holes of the discs. In this way different number of discs can be placed within the cartridge part 1 depending on the wanted effect of the driving charge.

When the driving charge 13 is fired the connection pipe 8 will burst because of the weakness area 18 so that the thrust plate 3 can be disconnected from the cartridge part 1 and be disconnected from the action part and pushes it out of the barrel.

Above it has been described and can be seen from the drawing that the disconnecting means of the connecting pipe 8 is formed by that the wall of the connecting pipe is thinner in a certain area of the pipe. This disconnecting means can however be in a different form, for instance it can be arranged at the upper end of the connection pipe where the connection pipe is connected to the underside of the pressure plate 3. The disconnecting means may here consist of weak threads or in a form of a disconnecting pin. The expression disconnecting means shall thus mean a general expression for some form of connec- tion, which will burst by a thrust action or of tensile action. Further it is also possible that the connection pipe as a whole can be formed by a material, which will burst due to the force from the driving charge when it is fired. This means that the connection pipe can be formed from plastic. This means that the pipe will be affected already when the charge 17 is ignited so that the strength of the pipe will be minimum when the driving charge is fired.

Claims

1. Unit shell, which is inserted from the back end of a barrel when loading a weapon, which unit shell includes a driving charge which in its end has a detonator for firing the driving charge and also includes an action part, c h a r a c t e r i z e d i n that the unit shell also includes a cartridge part (1) which is arranged at the bottom end (15) of the barrel (14) , which cartridge part has one end (2) detachably fixed to a thrust plate (3) fitting into the barrel, to which thrust plate (3) the action part (4) of the unit shell is detachably connected (at 11) , whereby in the opposite close end (16) of said cartridge part (1) the detonator (5) of the unit shell is placed in an ignition screw (6), which has an axial channel (7) in connection with the detonator (5), whereby a connecting pipe (8) connects the ignition screw (6) with the thrust plate (3) and has an charge (17), said connecting pipe being connected with one end (9) by the axial channel (7) of the ignition screw and hereby is con- nected to the detonator (5) whereby the other end of the connecting pipe (8) is connected to an axial channel (10) going through the thrust plate (3) which channel (10) is connected to an attachment (11) forming a detachable attachment of the action part (4) with the thrust plate (3) , which attachment (11) will be detached by the thrust action of the charge (17) when fired, and that the connection pipe (8) is formed with holes (12) through its wall which holes are in connection with the driving charge (13) in the cartridge part (1) for firing the driving charge (13) and that the connection pipe (8) co - prises weak connecting means (18) which will burst so that the connecting force of the connecting pipe (8) between the thrust plate (3) and the bottom end (16) of the cartridge part (1) will collapse, whereby the thrust plate (3) will be detached from the cartridge part (1) when the driving charge (13) is fired so that the thrust plate (3) will be released from the cartridge part (1) and the action part and will push the action part (4) out of the barrel.

2. Unit shell according to claim 1, c h a r a c t e r i z e d i n that the connection pipe (8) is connected with the bottom (16) of the cartridge part (1) and with the end of the thrust plate (3) opposite to the cartridge part (1) by means of threads and that the wall and the connection pipe (8) has a weak area, which will burst when the charge (17) is fired.

3. Unit shell according to claim 1 and claim 2, c h a r a c t e r i z e d i n that the cartridge part (1) is connected with the thrust plate (3) by means of surrounding flange connections.