EP0402268A1 - Pyrotechnischer Anzünder für wehrtechnische Ladungen oder Raketenmotoren oder Gasgeneratoren - Google Patents
Pyrotechnischer Anzünder für wehrtechnische Ladungen oder Raketenmotoren oder Gasgeneratoren Download PDFInfo
- Publication number
- EP0402268A1 EP0402268A1 EP90401570A EP90401570A EP0402268A1 EP 0402268 A1 EP0402268 A1 EP 0402268A1 EP 90401570 A EP90401570 A EP 90401570A EP 90401570 A EP90401570 A EP 90401570A EP 0402268 A1 EP0402268 A1 EP 0402268A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrical
- igniter
- igniter according
- pyrotechnic
- barrel
- 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- Withdrawn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
- 230000001960 triggered effect Effects 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 14
- 229910000679 solder Inorganic materials 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 239000003380 propellant Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000000977 initiatory effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 240000008042 Zea mays Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
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
- F42B3/10—Initiators therefor
- F42B3/12—Bridge initiators
- F42B3/124—Bridge initiators characterised by the configuration or material of the bridge
Definitions
- the present invention relates to a pyrotechnic igniter for triggering the operation of military charges or rocket propellants, missiles, and any other guided projectile or gas generators. It relates more particularly to the electrical supply system of the igniter and its arrangement inside an assembly forming a pyrotechnic generator.
- solid military charges can be initiated, for example, by a violent projection of a material on an intermediate charge so that the impact of the material on the intermediate charge causes initiation thereof.
- the projection of the material is caused by the explosion of a vaporizable metallic film, generally obtained by two different processes: - either the circulation of an electric current pulse; - or the absorption of a pulse of light energy generated by a laser.
- the invention relates more particularly to the first type of process in which a conductive element is used on which the material to be projected has been placed.
- an electrical discharge of very short duration but of very high intensity, is sent into the electrical element.
- the material is then projected against the intermediate load and causes its initiation.
- a first category of this type of igniter is equipped with an electrical element consisting of two strands connected at their end and placed close enough to each other to constitute a conductor with little inductive effect.
- This electrical element exits laterally at least on one of the walls of the device to connect to an external electrical supply.
- This flat connection is difficult to implement and is very fragile.
- the realization of such a system poses problems of integration, size, tightness and hermeticity.
- igniters has an electrical element which is supplied by two electrodes, placed perpendicularly to the electrical element.
- the space requirement even if it is reduced compared to the production of the first type of igniter, is always significant.
- sealing and hermeticity problems which are not resolved in this system and which can promote events, for example corrosion of the conductive element, tending to deteriorate the system.
- the object of the invention is to remedy the aforementioned drawbacks, by using a supply system making it possible to produce a reliable, robust assembly, easy to implement ensuring either a seal or an airtightness and the cost of which is relatively low.
- the invention relates to a pyrotechnic igniter comprising electrical control means with a sprayed layer composed of a barrel, a first cylindrical element and an assembly consisting of a fuse bridge on which a material is positioned and placed between the barrel and the first cylindrical element, means for supplying electrical power to the sprayed layer control means and pyrotechnic means triggered by the electrical sprayed layer control means, an igniter characterized in that the electrical supply means include conductive surfaces arranged on the barrel and / or the first cylindrical element and hermetic electrical crossing means of the barrel and / or the first cylindrical element to ensure the electrical connection of the fuse bridge with the conductive surfaces.
- the igniter comprises electrical means for controlling a sprayed layer, means for supplying electrical means and pyrotechnic means.
- the electrical means for controlling a projected layer comprise a fuse bridge 1, a material 2 and a mechanical confinement obtained using a gun 3 and a first cylindrical element 4.
- the fuse bridge 1 is, for example, a conductive element placed, for example, on connection sockets 5 and 6 of the connections 18 and 19 represented by hatching in FIG. 1.
- the shape of the fuse bridge 1 is obtained, for example, by etching these dimensions are chosen so that be compatible with the energy available in the ignition means.
- the material 2 is, for example, a film, for example, in kapton, positioned on the fuse bridge 1.
- the assembly formed by the fuse bridge 1 and the material 2 is wedged between the barrel 3 and the cylindrical element 4 thanks to a tightening of these two elements maintained in this position, for example, by a solder 9 made over the entire periphery of the facing surfaces.
- the material of the barrel 3 and of the cylindrical element 4 is chosen from materials of high mechanical impedance and preferably insulating materials, which makes it possible to ensure the dielectric rigidity necessary for the operating conditions.
- Elements 3 and 4 are, for example, made of ceramic.
- an orifice 10 is made in the middle of this allowing the projection of a part of the material 2 against a face 11 of a pyrotechnic composition 12. This barrel 3 ensures the separation between the fuse bridge 1 and the face 11 of a pyrotechnic composition 12 exposed the impact of a part of the material 2.
- the pyrotechnic composition 12 is, for example, placed inside a second cylindrical element 13 closed at one of these ends by a closing flake 30.
- the element 13 is fixed to the barrel 3, for example by a solder 14 produced over the entire periphery of the facing surfaces; the solderings 9 and 14 ensure the complete hermiticity of this igniter.
- the hermeticity thus obtained in particular prohibits the corrosion problems of the fuse bridge 1 and of the connection sockets 5 and 6 liable to deteriorate the system.
- Different architectures of the barrel 3 can be produced to integrate a pyrotechnic composition; the latter is, for example, formed of several layers whose sensitivity is different and can be placed in the cavity provided to receive the cylindrical element 13.
- Another architecture consists, for example, to remove the cylindrical element 13.
- the barrel 3 comprises two orifices, the orifice referenced 10 and another not shown making it possible to place the pyrotechnic composition 12.
- a solder enables the loading orifice to be closed with a spangle 30
- the means for supplying the electrical control means with a sprayed layer comprise the connections 18 and 19 composed, for example, of connection sockets 5 and 6 of different polarity placed respectively on a lower end 22 of the cylindrical element 4 and on an upper end of the barrel 3, hermetic electrical crossing means 15 and 16 constituted, for example , metallized holes filled or closed by a conductive element, for example, copper and produced, for example parallel to the central axis 17 of the igniter, inside the cylindrical element 4 and the barrel 3 in connection with connection sockets 5 and 6, and conductive surfaces composed, for example, of circular rings 7 and 8 positioned, for example, for the circular ring 7 on the upper external lateral wall of the element 4 and for the circular ring 8, on the lower external lateral wall of the barrel 3, and elements of conductive surfaces 28, 29 positioned flat, for example, for the first surface element 28 on the pa upper part of the cylindrical element 4 above the electrical crossing means 15 and for the second surface element 29
- the electrical connections of the fuse bridge 1 on the elements 4 and 3 can be made in different ways , either as described previously, or by using for example, a direct connection of the fuse bridge 1 with the hermetic electrical crossing means 15 and 16 of the elements 4 and 3.
- the positioning between these two elements 4 and 3 is obtained, for example , by depositing a solder not shown in this figure 2.
- the circular rings 7 and 8 are formed by an electrically conductive material, for example, copper and they have different polarities. These circular rings have a symmetry of revolution with respect to the axis 17.
- a solution consists, for example, in positioning a baffle 20, for example, in insulating material between the ends of the two circular rings 7 and 8 of the connections 18 and 19.
- the elements constituting the igniter are the same as those of FIG. 1.
- the conductive surfaces composed of the circular rings 7 and 8 and the surface elements 28, 29 in Figure 1 are replaced by concentric rings 26 and 27.
- the size and thickness of the various elements constituting the igniter are calculated according to a particular application.
- the igniter of FIG. 4 is therefore represented, for example, in an extra flat model usable for the initiation of a military charge.
- Part 21 represents the assembly (electrical control means with sprayed layer and pyrotechnic means) which has been described in FIG. 1 and which is used in the same way.
- the concentric rings 26 and 27 are positioned on the upper end 24 of the cylindrical element 4. They are positioned flat on this element 4.
- This arrangement allows an axial connection to the electronic firing means.
- the concentric rings 26 and 27 are separated, as shown in FIG. 5, for example, by a shoulder 25 produced from the cylindrical element 4 which ensures the desired function. So that the concentric rings 26 and 27 are in relation to the electrical control means to projected layer, electrical crossing means 15 and 16, defined above, have been drilled, for example parallel to the axis 17, in the cylindrical element 4.
- the electrical connection between the fuse bridge 1 and the connections 18 and 19 is performed according to one of the methods described above.
- An embodiment of this type ensures a one-piece construction, robust and easy to install because of the structure, for example, cylindrical of the assembly.
- This arrangement also facilitates the production of the hermetic version of an assembly consisting of an igniter according to the invention and an explosive charge.
- the architecture of such a type of igniter allows, inside a pyrotechnic chain consisting of electronic ignition means, the pyrotechnic igniter and pyrotechnic composition to be initiated , ease of assembly and disassembly of this igniter which allows maintenance operations and testing of the electronic ignition means.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Air Bags (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8907675A FR2648223B1 (fr) | 1989-06-09 | 1989-06-09 | Inflammateur pyrotechnique pour charges militaires ou propulseur ou generateur de gaz |
| FR8907675 | 1989-06-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0402268A1 true EP0402268A1 (de) | 1990-12-12 |
Family
ID=9382573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90401570A Withdrawn EP0402268A1 (de) | 1989-06-09 | 1990-06-08 | Pyrotechnischer Anzünder für wehrtechnische Ladungen oder Raketenmotoren oder Gasgeneratoren |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0402268A1 (de) |
| JP (1) | JPH0320600A (de) |
| CA (1) | CA2017495A1 (de) |
| FR (1) | FR2648223B1 (de) |
| ZA (1) | ZA904390B (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2669725B1 (fr) * | 1990-11-27 | 1994-10-07 | Thomson Brandt Armements | Detonateur pyrotechnique a connexions coaxiales. |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2006402A (en) * | 1977-10-20 | 1979-05-02 | Dynamit Nobel Ag | Electric firing element |
| GB2100395A (en) * | 1981-06-15 | 1982-12-22 | Secr Defence | Pyrotechnic devices |
| US4602565A (en) * | 1983-09-26 | 1986-07-29 | Reynolds Industries Inc. | Exploding foil detonator |
| EP0296962A1 (de) * | 1987-06-23 | 1988-12-28 | Thomson-Brandt Armements | Anzünder für einen pyrotechnischen Generator |
| EP0310517A1 (de) * | 1987-10-01 | 1989-04-05 | GIAT Industries | Geschossboden für eine mit einem elektrischen Zünder versehene Grosskalibermunition |
-
1989
- 1989-06-09 FR FR8907675A patent/FR2648223B1/fr not_active Expired - Fee Related
-
1990
- 1990-05-24 CA CA002017495A patent/CA2017495A1/fr not_active Abandoned
- 1990-06-07 JP JP2149735A patent/JPH0320600A/ja active Pending
- 1990-06-07 ZA ZA904390A patent/ZA904390B/xx unknown
- 1990-06-08 EP EP90401570A patent/EP0402268A1/de not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2006402A (en) * | 1977-10-20 | 1979-05-02 | Dynamit Nobel Ag | Electric firing element |
| GB2100395A (en) * | 1981-06-15 | 1982-12-22 | Secr Defence | Pyrotechnic devices |
| US4602565A (en) * | 1983-09-26 | 1986-07-29 | Reynolds Industries Inc. | Exploding foil detonator |
| EP0296962A1 (de) * | 1987-06-23 | 1988-12-28 | Thomson-Brandt Armements | Anzünder für einen pyrotechnischen Generator |
| EP0310517A1 (de) * | 1987-10-01 | 1989-04-05 | GIAT Industries | Geschossboden für eine mit einem elektrischen Zünder versehene Grosskalibermunition |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA904390B (en) | 1991-03-27 |
| CA2017495A1 (fr) | 1990-12-09 |
| JPH0320600A (ja) | 1991-01-29 |
| FR2648223B1 (fr) | 1994-03-25 |
| FR2648223A1 (fr) | 1990-12-14 |
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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 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE ES GB IT LI SE |
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| 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: 19910613 |