AU599199B2 - A propagating device for low energy fuses - Google Patents
A propagating device for low energy fuses Download PDFInfo
- Publication number
- AU599199B2 AU599199B2 AU10946/88A AU1094688A AU599199B2 AU 599199 B2 AU599199 B2 AU 599199B2 AU 10946/88 A AU10946/88 A AU 10946/88A AU 1094688 A AU1094688 A AU 1094688A AU 599199 B2 AU599199 B2 AU 599199B2
- Authority
- AU
- Australia
- Prior art keywords
- housing
- connection means
- propagating
- delay element
- low energy
- 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.)
- Ceased
Links
- 230000001902 propagating effect Effects 0.000 title claims description 27
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 239000002360 explosive Substances 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 5
- 150000001540 azides Chemical class 0.000 claims description 3
- WETZJIOEDGMBMA-UHFFFAOYSA-L lead styphnate Chemical compound [Pb+2].[O-]C1=C([N+]([O-])=O)C=C([N+]([O-])=O)C([O-])=C1[N+]([O-])=O WETZJIOEDGMBMA-UHFFFAOYSA-L 0.000 claims description 3
- 230000000717 retained effect Effects 0.000 claims description 2
- 238000005422 blasting Methods 0.000 claims 2
- 239000003984 copper intrauterine device Substances 0.000 claims 1
- 230000035939 shock Effects 0.000 description 6
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241001482237 Pica Species 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/04—Arrangements for ignition
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
- C06C5/00—Fuses, e.g. fuse cords
- C06C5/06—Fuse igniting means; Fuse connectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/04—Arrangements for ignition
- F42D1/043—Connectors for detonating cords and ignition tubes, e.g. Nonel tubes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fuses (AREA)
Description
F
AECI 595 P/00/011 414USTRALI 5991g Form PATENTS ACT 1952-1973 COMPLETE SPECIFICATION
(ORIGINAL)
FOR OFFICE USE Class: Int. CI: -Application N4umber: Lodged; a Complete Specification-Lodged: 0 0~1fl Accepted: Published: r Priority ~i Related Art: TO BE COMPLETED BY APPLICANT Name of Applicant: Address of Applicant: Actual Inventor: AECI LIMITED AECI LIMITED 16th Floor, Office Tower, Carlton Centre, Commissioner stteet, Johanesurg Transvaal, Republic of South Africa Jean Luc CURUTCHET ICI Australia Operations Proprietary Limited Address for Service, Industrial Property Section 1 Nicholson Street GPO Box 4311 Melbourne 3001, Victoria Australia Complete Specification for the invention entitled, A PROPAGATING DEVICE VOR LOW ENERGY FUSES The following statement is a full description of this invention, Including the best method of performing it known to me:- 'Note: The description Is to be typed In double spacing, pica type face, In an area not exceeding 250 mm In depth end 160 mm In width, on tough white paper of good quality and It Is to be Inserted Inside this form.
11710/76-L 11710/78-L C. J. Twomaisu'. Com~monw~ealth Oovernment PontrConbkro -2- THIS INVENTION relates to a propagating device, or relay for low energy fuses.
Low energy fuses such as that know by the Registered Trade Mark "NONEL" comprise a length of plastic tubing with a thin explosive coating therein.
According to the invention there is provided a propagating device for low energy fuses which includes a housing; a first connection means fast with the housing for connecting a first length of fuse to the housing so that the said first length of fuse is in communication with the interior S of the housing; a second connection means spaced from the first connection means, the second connection means being fast with the housing for connecting a second length of fuse to the housing so that the said second length of fuse is also in communication with the interior of the housing; and a propagating means located within the housing intermediate the first connection means and the second connection means, the propagating means being responsive to a shock wave passing into the housing from the first length of low energy fuse and the propagating means being adapted to I provide a propagating shock wave to the second lejngth of low energy fuse of sufficient intensity to activate th, second length of fuse said propagating means comprising two propagating elements in a spaced relationship within the interior of the housing each propagating element comprising a short length of open-ended tubing containing an explosive or pyrotechnic composition.
f i e -3- The housing may comprise a substantially tubular member with the first connection means being provided at one end of the tubular member and the second connection means being provided at the other end.
The propagating man-ay comprise two p-opagating elements arranged in spaced relationship within the interior of the tubular member.
Each propagating element mav comprise a short length of tubing containing an explosive or pyrotechnic composition. The explosive composition may comprise lead azide, lead styphnate or a mixture of both.
The device may include a delay element arranged intermediate the two propagating elements. The delay element may comprise a pyrotechnic composition.
Each connection means may comprise a component defining a passage whereby communication with the interior of the housing is established. Conveniently, the component may be a plug which is receivable in the end of the tubular member.
The passage may be closed off by a membrane to seal the interior of the housing hermetically.
Each connection means may include a spigot-like formation which projects outwardly from the component, the spigot-like S- 4 formation being engageable with an end of the associated length of fuse. It will be appreciated that, in place of the spigot-like formation, a socket-like portion with which the length of fuse is engageable could be provided.
The device may include a closure member for each spigot-like formation for closing off the free end of each spigot-like formation.
The connection means and the delay element mdy be retained in position in the housing by the housing being crimped about the connection means and the delay element.
It will be appreciated that with a propagating device in accordance with the invention, a shock front may be propagated from one lergth of low energy fuse to another, in either direction, with or without a time delay.
The invention is now described, by way of an example, with reference to the accompanying drawing, which shows a sectioned view of a propagating device in accordance with the invention, Referring to the drawing, a propagating device, or relay, is designated generally by reference numeral 10. The' device 10 has a tubular housing 12 that is of aluminium, copper or a suitable synthetic plastics material. Centrally located i^ [r-jii~ T within the housing 12 is a time delay element 14 which is of a suitable pyrotechnic composition, such as Si/PbO The housing 12 2 is crimped in the region of the time delay 14, as at 16, to retain the delay element 14 in position.
At each end of the housing 12 there is a rubber plug 18 which defines a central passage the passage 20 being closed close to its inner end by means of a membrane 22. The plugs 18 are held in position by crimping of the housing 12, as shown at 24. Further, in the embodiment illustrated, a short length of tubing 26 which may have some explosive powder therein as is the case with low energy fuse, has one end secured within the passage of the plug 18 and has its other end projecting a short distance from the free end of the plug 18. The free end of each length of tubing 26 is closed by a cap 28. It will be appreciated that, instead of the length of tubing the end of the length of fuse could be inserted into the passage 20 of the plug 18 directly.
Between the delay element 14 and the plugs 18, and spaced from the delay element 14, there are two propagating elements 30, one on each side of the delay element 14. Each propagating element 30 constitutes a short length of hollow aluminium 32 which is packed with a suitable propagating material, such as lead azide or lead styphnate 34.
In use, the caps 28 are removed and a first length of i I-i j L u i; i. 1 -i a -6if low energy fuse (not shown) is engaged with one length of tubing 26 by means of a connecting piece (also not shown) and the other length of tubing 26 is engaged with the other length of fuse (also not shown) by a further connecting piece (that is also not shown). Then, a shock wave provided by one of the lengths of fuse will pass through its associated length of tubing 26, rupture the membrane 22 and activate the adjacent propagating element 30. This propagating element 30 will in turn activate the delay element 14. After a period of time determined by the delay element 14 the other propagating element 30 will be activated and it in turn will rupture the membrane 22 adjacent thereto with the shock wave passing through the associated length of tubing 26 into the low energy fuse connected thereto, thereby initiating a shock wave in that length of low energy fuse.
It will be appreciated that more than one length of fuse can be connected to each end of the propagating device by suitably branched connecting pieces.
.J,
LI
Claims (9)
- 2. The device as claimed in Claim 1 in which the housing comprises a substantially tubular member with the first connection means being provided at one end of the tubular member and the second connection means being provided at the other end.
- 3. The device as claimed in Claim 1 in which the explosive composition comprises lead azide, lead styphnate or a mixture of both.
- 4. The device as claimed in any one Claims 1 to 3 inclusive which includes a delay element arranged intermediate the two propagating elements. The device as claimed in Claim 4 in which the delay element comprises a pyrotechnic composition.
- 6. The device as claimed in any one of the preceding claims in which each connection means comprises a component defining a passage whereby communication with the interior of the housing is established.
- 7. The device as claimed in Claim 6 in which the passage is closed off by a membrane to seal the interior of the housing hermetically,
- 8. The device as claimed in Claim 6 or Claim 7 in which each connection means includes a spigot-like formation which p, .ects outwardly from the component, the spioot-iike formation being engageable with an end of the associated length of fuse.
- 9. The device as claimed in Claim 8 which includes a closure member for each spigot-like formation for closing off the free end of each spigot-like formation, ass 4t r (tt i a4, 4,< S4 4 4444 INN Ir 0 ap"" 0" i, i. i y i- i 9 The device as claimed in any one of Claims 4 to 9 inclusive in which the connection means and the delay element are retained in position in the housing by the housing being crimped about the connection means and the delay element.
- 11. A blasting system which includes a plurality of lengths of low energy fuse with at least one pair adjacent lengths of low energy fuse being interconnected by means of a propagating device as claimed in any one of Claims 1 Sto 10 inclusive.
- 12. A device according to any one of Claims 1 to inclusive substantially as herein described with reference to the drawing. o 13. A blasting system according to Claim 11 wherein the propagating device is substantially as herein described with reference to the drawing. Dated this day of 1989 AECI LIMITED by its Patent Attorney Davy 1396 r tc i cu 7 ft- ii i, 1 -i I i -L 1
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA87995 | 1987-02-11 | ||
| ZA87/0995 | 1987-02-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU1094688A AU1094688A (en) | 1988-08-18 |
| AU599199B2 true AU599199B2 (en) | 1990-07-12 |
Family
ID=25578763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU10946/88A Ceased AU599199B2 (en) | 1987-02-11 | 1988-01-28 | A propagating device for low energy fuses |
Country Status (6)
| Country | Link |
|---|---|
| AU (1) | AU599199B2 (en) |
| CA (1) | CA1316759C (en) |
| GB (1) | GB2200977B (en) |
| IE (1) | IE880267L (en) |
| NZ (1) | NZ223367A (en) |
| ZW (1) | ZW788A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2280529A (en) * | 1993-07-26 | 1995-02-01 | Autoliv Dev | Vehicle safety arrangement. |
| US5413046A (en) * | 1994-03-11 | 1995-05-09 | The Ensign-Bickford Company | Shock tube assembly |
| AUPP021697A0 (en) | 1997-11-06 | 1997-11-27 | Rocktek Limited | Radio detonation system |
| ZA200703938B (en) * | 2007-05-16 | 2009-07-29 | Beijing Auxin Chemical Technol | Three-way connector block |
| CN105605998A (en) * | 2016-01-18 | 2016-05-25 | 中国科学技术大学 | an explosive diode |
| AU2020216554B2 (en) * | 2019-01-28 | 2024-12-19 | Detnet South Africa (Pty) Ltd | Detonator construction |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU522900B2 (en) * | 1978-03-17 | 1982-07-01 | Ici Australia Limited | A fuse device |
| AU5859086A (en) * | 1985-06-28 | 1987-01-08 | Aeci Limited | The interconnecting of low energy fuses |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB815533A (en) * | 1956-11-05 | 1959-06-24 | Du Pont | Improvements in or relating to connectors for explosive cord |
| GB855749A (en) * | 1958-12-08 | 1960-12-07 | Ici Ltd | Improvements in reversible delay connectors |
| FR1310549A (en) * | 1961-09-11 | 1962-11-30 | Davey Bickford Smith & Cie Sa | Detonation delay relay for detonating cord |
| DE1153307B (en) * | 1961-09-22 | 1963-08-22 | Dynamit Nobel Ag | Detonating cord connector |
| FR2470757A1 (en) * | 1979-12-07 | 1981-06-12 | Aerospatiale | PYROTECHNIC CONNECTION WITH SEALED AND SELF-RELEASABLE PARTS |
| US4350097A (en) * | 1980-05-19 | 1982-09-21 | Atlas Powder Company | Nonelectric delay detonator with tubular connecting arrangement |
| US4424747A (en) * | 1981-04-27 | 1984-01-10 | E. I. Du Pont De Nemours And Company | Non-electric blasting assembly |
| NZ208080A (en) * | 1983-05-20 | 1986-10-08 | Ici Australia Ltd | Connector between detonating cord and low energy impulse propagating tubing |
| US4664033A (en) * | 1985-03-22 | 1987-05-12 | Explosive Technology, Inc. | Pyrotechnic/explosive initiator |
-
1988
- 1988-01-18 ZW ZW7/88A patent/ZW788A1/en unknown
- 1988-01-28 GB GB8801934A patent/GB2200977B/en not_active Expired - Fee Related
- 1988-01-28 AU AU10946/88A patent/AU599199B2/en not_active Ceased
- 1988-01-29 NZ NZ223367A patent/NZ223367A/en unknown
- 1988-01-29 CA CA000557762A patent/CA1316759C/en not_active Expired - Fee Related
- 1988-02-01 IE IE880267A patent/IE880267L/en unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU522900B2 (en) * | 1978-03-17 | 1982-07-01 | Ici Australia Limited | A fuse device |
| AU5859086A (en) * | 1985-06-28 | 1987-01-08 | Aeci Limited | The interconnecting of low energy fuses |
Also Published As
| Publication number | Publication date |
|---|---|
| IE880267L (en) | 1988-08-11 |
| AU1094688A (en) | 1988-08-18 |
| CA1316759C (en) | 1993-04-27 |
| NZ223367A (en) | 1989-10-27 |
| GB2200977B (en) | 1990-02-28 |
| GB8801934D0 (en) | 1988-02-24 |
| ZW788A1 (en) | 1988-08-31 |
| GB2200977A (en) | 1988-08-17 |
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