EP0689662A1 - Shaped charge for the destruction of ammunition underwater - Google Patents
Shaped charge for the destruction of ammunition underwaterInfo
- Publication number
- EP0689662A1 EP0689662A1 EP94921739A EP94921739A EP0689662A1 EP 0689662 A1 EP0689662 A1 EP 0689662A1 EP 94921739 A EP94921739 A EP 94921739A EP 94921739 A EP94921739 A EP 94921739A EP 0689662 A1 EP0689662 A1 EP 0689662A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hollow member
- disrupter
- wall portion
- disc
- disruptable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/08—Blasting cartridges, i.e. case and explosive with cavities in the charge, e.g. hollow-charge blasting cartridges
Definitions
- SHAPED CHARGE FOR THE DESTRUCTION OF AMMUNITION UNDERWATER This invention relates to disposal apparatus for use underwater and more particularly but not exclusively to ballistic disc explosive ordnance disposal apparatus.
- the invention also relates to conversion apparatus for facilitating the operation underwater of an existing ballistic disc ordnance disposal apparatus.
- Explosive-driven ballistic disc devices have been used for the safe disposal of ordnance items in air.
- a metal cylinder containing an explosive charge has a detonator at one end while the other end is closed by a cup-shaped copper disc.
- the cup-shaped profile of the disc protrudes into a matching depression in the explosive charge, i.e. a shaped charge is formed.
- the disc is directed towards the item to be disposed of and the explosive charge detonated. This drives the disc to the item and the item is destroyed.
- disposal apparatus for use underwater, the apparatus comprising an enclosure which is sealed for excluding water therefrom and which contains explosive material and a disrupter member having one side adjacent to the explosive material and the other side facing but spaced from a disruptable wall portion of the enclosure for detonation of the explosive material to propel the disrupter member to and through the said wall portion and then impacting upon an item for disposal near which item the apparatus is positioned when ready for use.
- apparatus for underwater operation of a ballistic disc ordnance disposal device comprising an elongated hollow member, a disruptable cover at one end of the hollow member, and attachment means for connecting the other end of the hollow member to a ballistic disc ordnance disposal device for the ballistic disc of the device to be exposed to the interior of the hollow member and to face but remain spaced from said one end thereof, and for the said interior of the hollow member to be sealed to exclude water therefrom.
- the disposal device comprises a hollow metal cylinder 1 containing a shaped explosive charge 2.
- the end 3 of the cylinder 1 is fitted with an electrical detonator 4.
- the other end 5 of the cylinder 1 is closed by a copper disc 6.
- the disc is cup-shaped to fit into a depression 7 at this end of the shaped charge 2.
- the disposal device When used in air, the disposal device would be positioned with end 5 facing but spaced from the item to be destroyed. The explosive charge is then detonated and the disc is propelled onto the item.
- conversion apparatus including an aluminium extension cylinder 8 into one end of which there is fitted the end 5 of cylinder 1.
- the two cylinders are fixed and sealed together by epoxy adhesive 9.
- a clamp or other attachment device 10 is provided for fixing the device adjacent to an item to be destroyed.
- an item might be a limpet mine on a ship's hull, and the device 10 should then be suitable for fixing the disposal device to that hull.
- the other end of the cylinder 8 is closed by a thin end plate 11 which might be less than 0.5mm thick for preference or could be even made of foil.
- the conversion apparatus also includes a water-tight sealing member 12 fitted to the detonator end of the cylinder 1.
- This member 11 comprises an aluminium plug 13, with plastic 0-ring seals 14 and grub-screw 15 to secure it.
- the disc 6 is driven forward through cylinder 8 and end cover plate 11 to impact the item to be disposed of.
- Cylinder 8 provides an air space in which disc 8 can gain sufficient speed to destroy the item.
- the cylinders 1 and 8 could be made, say of plastics material, as an integral whole.
- the complete disposal apparatus could be incorporated into an underwater item of equipment or weapon for use as a self-destruct system.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Processing Of Solid Wastes (AREA)
- Cleaning In General (AREA)
Abstract
Ballistic disc ordnance disposal device adapted for better efficiency underwater has an air-filled extension cylinder (8) attached to the disc end of a shaped charge container (1). On detonation, the disc (7) is driven through the extension cylinder (8) and through a relatively thin end cover plate thereof (11). The extension cylinder provides an air-filled space that permits the disc (7) to gain sufficient speed to destroy say a limpet mine.
Description
SHAPED CHARGE FOR THE DESTRUCTION OF AMMUNITION UNDERWATER This invention relates to disposal apparatus for use underwater and more particularly but not exclusively to ballistic disc explosive ordnance disposal apparatus. The invention also relates to conversion apparatus for facilitating the operation underwater of an existing ballistic disc ordnance disposal apparatus.
Explosive-driven ballistic disc devices have been used for the safe disposal of ordnance items in air. In one such device, a metal cylinder containing an explosive charge has a detonator at one end while the other end is closed by a cup-shaped copper disc. The cup-shaped profile of the disc protrudes into a matching depression in the explosive charge, i.e. a shaped charge is formed. In use, the disc is directed towards the item to be disposed of and the explosive charge detonated. This drives the disc to the item and the item is destroyed.
Underwater, e.g.. to dispose of limpet mines and such, such devices are less effective.
According to one aspect of the invention, there is provided disposal apparatus for use underwater, the apparatus comprising an enclosure which is sealed for excluding water therefrom and which contains explosive material and a disrupter member having one side adjacent to the explosive material and the other side facing but spaced from a disruptable wall portion of the enclosure for detonation of
the explosive material to propel the disrupter member to and through the said wall portion and then impacting upon an item for disposal near which item the apparatus is positioned when ready for use.
According to another aspect of the invention, there is provided apparatus for underwater operation of a ballistic disc ordnance disposal device, the apparatus comprising an elongated hollow member, a disruptable cover at one end of the hollow member, and attachment means for connecting the other end of the hollow member to a ballistic disc ordnance disposal device for the ballistic disc of the device to be exposed to the interior of the hollow member and to face but remain spaced from said one end thereof, and for the said interior of the hollow member to be sealed to exclude water therefrom.
For a better understanding of the invention and to show how the same may be carried into effect, reference will now be made, by way of example, to the accompanying drawing, the single figure of which is a sectional view of an explosive ballistic-disc disposal device which has been converted for better operation underwater.
The disposal device comprises a hollow metal cylinder 1 containing a shaped explosive charge 2. The end 3 of the cylinder 1 is fitted with an electrical detonator 4. The other end 5 of the cylinder 1 is closed by a copper disc 6.
The disc is cup-shaped to fit into a depression 7 at this end of the shaped charge 2.
When used in air, the disposal device would be positioned with end 5 facing but spaced from the item to be destroyed. The explosive charge is then detonated and the disc is propelled onto the item.
To make the device better suited for use underwater, there has been provided conversion apparatus including an aluminium extension cylinder 8 into one end of which there is fitted the end 5 of cylinder 1. The two cylinders are fixed and sealed together by epoxy adhesive 9.
A clamp or other attachment device 10 is provided for fixing the device adjacent to an item to be destroyed. For example, one item might be a limpet mine on a ship's hull, and the device 10 should then be suitable for fixing the disposal device to that hull.
The other end of the cylinder 8 is closed by a thin end plate 11 which might be less than 0.5mm thick for preference or could be even made of foil. The conversion apparatus also includes a water-tight sealing member 12 fitted to the detonator end of the cylinder 1. This member 11 comprises an aluminium plug 13, with plastic 0-ring seals 14 and grub-screw 15 to secure it.
On detonation of charge 2, the disc 6 is driven forward through cylinder 8 and end cover plate 11 to impact the item to be disposed of. Cylinder 8 provides an air space in which disc 8 can gain sufficient speed to destroy the item. Instead of comprising a separate disposal device and conversion apparatus, the cylinders 1 and 8 could be made, say of plastics material, as an integral whole.
The complete disposal apparatus could be incorporated into an underwater item of equipment or weapon for use as a self-destruct system.
Claims
1. Disposal apparatus for use underwater, the apparatus comprising an enclosure which is sealed for excluding water therefrom and which contains explosive material and a disrupter member having one side adjacent to the explosive material and the other side facing but spaced from a disruptable wall portion of the enclosure for detonation of the explosive material to propel the disrupter member to and through the said wall portion and then impacting upon an item for disposal, near which item the apparatus is positioned when ready for use.
2. Apparatus according to claim 1, wherein the enclosure is elongate.
3. Apparatus according to claim 1 or 2, wherein the said wall portion is made of relatively thin material to ease emergence therethrough of the disrupter member.
4. Apparatus according to claim 1,2 or 3, wherein said disrupter member comprises sheet material and is positioned closely adjacent the explosive material, the member having a cup-shaped cross-sectional profile and protruding into a correspondingly shaped adjacent surface of the explosive material.
5. Apparatus according to any preceding claim, wherein the enclosure comprises a first hollow member filled with said explosive material and having one wall formed by said disrupter member, and a second hollow member having one wall formed by said disruptable wall portion and being connected to the first hollow member so that the disrupter member is exposed to the interior of the second hollow member and faces but is spaced from said disruptable wall portion.
6. Apparatus according to any preceding claim, wherein the enclosure is an elongate cylinder, the disrupter member is a copper disk and the disruptable wall portion is a relatively thin plate covering an end of the cylinder.
7. Disposal apparatus for use underwater substantially as hereinbefore described with reference to the accompanying drawings.
8. Apparatus for underwater operation of a ballistic disc ordnance disposal device, the apparatus comprising an elongated hollow member, a disruptable cover at one end of the hollow member, and attachment means for connecting the other end of the hollow member to a ballistic disc ordnance disposal device for the ballistic disc of the device to be exposed to the interior of the hollow member and to face but remain spaced from said one end thereof, and for the said interior of the hollow member to be sealed to exclude water therefrom.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9315668 | 1993-07-29 | ||
GB939315668A GB9315668D0 (en) | 1993-07-29 | 1993-07-29 | Disposal apparatus |
PCT/GB1994/001620 WO1995004252A1 (en) | 1993-07-29 | 1994-07-29 | Shaped charge for the destruction of ammunition underwater |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0689662A1 true EP0689662A1 (en) | 1996-01-03 |
Family
ID=10739608
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94921739A Withdrawn EP0689662A1 (en) | 1993-07-29 | 1994-07-29 | Shaped charge for the destruction of ammunition underwater |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0689662A1 (en) |
GB (1) | GB9315668D0 (en) |
NO (1) | NO951298L (en) |
WO (1) | WO1995004252A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2506364A (en) * | 2012-09-26 | 2014-04-02 | Alford Res Ltd | Explosive charge |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3117518A (en) * | 1947-04-15 | 1964-01-14 | Louis F Porter | Apparatus for cutting encased explosives |
US3759182A (en) * | 1967-10-19 | 1973-09-18 | T Suhonen | Hollow charge having a directed explosive effect |
FR2106860A5 (en) * | 1970-09-25 | 1972-05-05 | Europ Propulsion | |
US3695141A (en) * | 1970-11-06 | 1972-10-03 | Us Navy | Explosive ordnance demolition weapon |
GB1550340A (en) * | 1976-10-01 | 1979-08-15 | Allbrown Universal Components | Frenching charge case |
SE8702854D0 (en) * | 1986-07-03 | 1987-07-02 | British Aerospace | EXPLOSIVE DEVICE |
DE3623240C1 (en) * | 1986-07-10 | 1987-10-15 | Messerschmitt Boelkow Blohm | Shaped charge for disarming ammunition |
GB2221285B (en) * | 1988-07-27 | 1992-09-30 | Alford Sidney C | Linear cutting charge and kit-of-parts for making same |
-
1993
- 1993-07-29 GB GB939315668A patent/GB9315668D0/en active Pending
-
1994
- 1994-07-29 WO PCT/GB1994/001620 patent/WO1995004252A1/en not_active Application Discontinuation
- 1994-07-29 EP EP94921739A patent/EP0689662A1/en not_active Withdrawn
-
1995
- 1995-04-04 NO NO951298A patent/NO951298L/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO9504252A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2506364A (en) * | 2012-09-26 | 2014-04-02 | Alford Res Ltd | Explosive charge |
GB2506364B (en) * | 2012-09-26 | 2016-08-31 | Alford Res Ltd | A charge for underwater use |
Also Published As
Publication number | Publication date |
---|---|
NO951298D0 (en) | 1995-04-04 |
NO951298L (en) | 1995-05-22 |
WO1995004252A1 (en) | 1995-02-09 |
GB9315668D0 (en) | 1994-01-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19950719 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR GB IE IT |
|
17Q | First examination report despatched |
Effective date: 19960213 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19960824 |