Devices for firing a projectile

a projectile and device technology, applied in the direction of firing/trigger mechanism, ammunition, weapons, etc., can solve the problems of device requiring a relatively large charge and long barrel, device can take a relatively long time to be primed for firing, and additional barrel breech does increase the size and weight of the devi

Inactive Publication Date: 2009-02-05
RICHMOND EEI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]According to a first aspect of the invention, there is provided a cartridge for a device for firing a projectile, the cartridge comprising a housing having first and second chambers, respectively containing first and second charges of propellant material, and each having a respective outlet, wherein, in use, the outlet of the first chamber

Problems solved by technology

However, these ports reduce the pressure of the gases which are used to propel the projectile, and thus result in the device requiring a relatively large charge and long barrel in order to be able to accelerate the projectile to a sufficiently high velocity.
Although the anti-recoil system of such device does not require a longer primary barrel (for the projectile), the additional barrel breech does increase the size and weight of the device.
Furthermore, the device can take a relatively long time to be primed for firing and it can be difficu

Method used

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  • Devices for firing a projectile
  • Devices for firing a projectile
  • Devices for firing a projectile

Examples

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second embodiment

[0058]Turning to FIG. 5 to 7, the cartridge in accordance with the invention has a three part housing formed from two cupped aluminium end pieces 100 and 102 attached one to either side of a central, cylindrical, stainless steel connector 104.

[0059]The cupped piece 102 defines a chamber 106 which contains two propellant charge portions 108 and 110 which correspond to the first propellant charge 34 of the first embodiment. The charge portion 110 is of a relatively slow burning explosive propellant material, whilst the charge portion 108 is of a faster burning explosive material. The two charge portions are separated by a paper disc 112. Similarly, the cupped end piece 100 defines a chamber 114 in which are contained a charge portion 116 of slow burning explosive propellant separated by a paper disc 118 from a charge portion 120 of fast burning explosive propellant. The charge portions 120 and 116 correspond to the second propellant charge 36 of the first embodiment. As can be seen fr...

first embodiment

[0063]The collar 132 also has an internal screw thread 134 via which an externally screw threaded stainless steel plug 136 is attached to the connector 104 to define a bulkhead for the chamber 106. An eccentric axial bore 138 connects the chamber 106 to an ignition chamber 140, which contains an electrical fuse head 142 (similar to the fuse head 16 of the first embodiment). As with the fuse head 16, one side of the fuse head wire is connected to a positive electrical contact 144, the other to earth, and an axial brass ferrule 146 lines the ignition chamber 140.

[0064]The side of the chamber 140 opposite to the plug 136 is provided with a short passage 148 which is concentric with the connector 104, and which leads a dished seat portion 150. The seat portion leads to a small, generally cylindrical gallery 152 which accommodates a valve member 154 comprising a steel ball. The gallery 150 is formed in a stainless steel, axial plug 156 which is provided with a central axial bore 158 situ...

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PUM

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Abstract

A housing (1; 100, 104, 102) of a cartridge for a device for firing a projectile has separate first and second chambers (10, 12; 106, 114), each of which contains a respective charge (34, 36; 108, 110, 116, 120) of propellant material. Gas produced by the detonation of one of the charges exits the first chamber to propel the projectile, whilst gas from the detonation of the second charge exist rearwardly from the device so as to counteract recoil. A one way valve may also be provided to help to achieve a high pressure difference between the chambers, where the cartridge has a common igniter assembly.

Description

FIELD OF THE INVENTION[0001]This invention relates to a cartridge for a device for firing a projectile and to a device for firing a projectile. Although described in relation to a device for de-arming / disrupting an explosive device, the invention is not limited in application to de-arming and disrupting devices.BACKGROUND TO THE INVENTION[0002]A conventional de-arming device (also referred to as a disrupting device or a de-armer disrupter) operates by firing a solid, liquid or gel projectile at an explosive device so as to disrupt the fuse assembly of the latter, ideally without detonating the explosive device. Such a de-arming device comprises a barrel, the breech of which contains a conventional gun cartridge which, when detonated, propels the projectile, also initially contained in the barrel, towards the target.[0003]It is generally desirable to provide means for reducing the recoil caused by the firing of the projectile, and to that end it is known to fit the end of the barrel ...

Claims

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Application Information

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IPC IPC(8): F41A1/08F42B5/05F42B5/38
CPCF41A1/08F42B5/38F42B5/05
Inventor GILBERT, ROBERT JACKSON
Owner RICHMOND EEI
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