EP0191903B1 - Electric primer or igniter - Google Patents
Electric primer or igniter Download PDFInfo
- Publication number
- EP0191903B1 EP0191903B1 EP85113509A EP85113509A EP0191903B1 EP 0191903 B1 EP0191903 B1 EP 0191903B1 EP 85113509 A EP85113509 A EP 85113509A EP 85113509 A EP85113509 A EP 85113509A EP 0191903 B1 EP0191903 B1 EP 0191903B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- insulating body
- primer
- igniter
- electrodes
- coating
- 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.)
- Expired
Links
- 230000037452 priming Effects 0.000 claims abstract 6
- 238000005474 detonation Methods 0.000 claims abstract 2
- 239000011248 coating agent Substances 0.000 claims description 21
- 238000000576 coating method Methods 0.000 claims description 21
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 229910000859 α-Fe Inorganic materials 0.000 claims description 2
- 239000002360 explosive Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 239000012799 electrically-conductive coating Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C19/00—Details of fuzes
- F42C19/08—Primers; Detonators
- F42C19/12—Primers; Detonators electric
Definitions
- the invention relates to an electrical ignition or ignition element, comprising a pyrotechnic ignition or ignition charge in an essentially tubular insulating body and two electrodes which are bridged by an ignition bridge or by the electrically conductive region of the ignition or ignition charge applied to them.
- the invention has for its object to provide an electrical ignition or ignition element of the type mentioned, in which axial displacements of the primer have no adverse effect on the ignition reliability.
- this object is achieved in that the electrodes on the inside of the tubular insulating body extend into the area of the ignition or ignition charge.
- the electrodes are not located on one end face of the primer, but are in contact with the peripheral wall of the primer. If the primer moves inside the insulator, it only moves along the electrodes without affecting the ignitability. With stratified ignition elements, the thermal contact between the primer and the ignition bridge is maintained, and with split ignition elements, the thermal and electrical contact of the primer with both electrodes is retained, even if the primer should move inside the surrounding insulating body.
- the inside cross section of the insulating body is constant and it corresponds to the outside cross section of the igniter set pressed into the insulating body.
- the electrodes consist of a conductive coating of the insulating body that is completely or partially interrupted by a gap.
- the gap which interrupts the coating does not completely separate the electrodes from one another; rather, there remains a bridge made of the conductive coating that forms the ignition bridge.
- the two electrodes are completely separated from one another on the inside of the insulating body.
- the coating extends essentially over the entire surface of the insulating body and that the electrodes are separated from one another by a second gap interrupting the coating on the outside of the insulating body.
- the electrodes extend around the front ends of the insulating body. The contacting, i.e. the soldering or welding of the connecting lines can be carried out on the outside of the ignition element.
- the coating extends essentially over the entire surface of the insulating body and is interrupted on the outside of the peripheral wall by a helical second gap.
- the two coil ends are connected to one another in the interior of the insulating body by the current bridge or by the electrically conductive explosive.
- An electromagnetic alternating field can be induced in the coil, which supplies the ignition current.
- the ignition bridge or the conductive primer represents an ohmic consumer for the electrical energy that can be generated from the secondary coil.
- the insulating body carrying the coil consists of non-conductive ferrite material. The insulating body then acts simultaneously as a coil core by concentrating the field lines of the externally generated magnetic field.
- the insulating body can also consist of an explosive-binder-fiber mixture.
- the insulating body which is given sufficient mechanical strength by the fibers and the binding agent, also contains explosives which, when ignited, burn together with the explosives of the primer and enhance its effectiveness.
- the gap ignition element shown in Fig. 1 has a tubular insulating body with a circular cross section, which consists for example of A1 2 0 3 .
- the insulating body 1 is provided on all of its surfaces with an electrically conductive coating 2, for example made of nickel, which has been applied, for example, in a chemical or galvanic process.
- the layer thickness is constant at all points and is between 1 and 4 pm.
- the coating 2 On the inside of the peripheral wall of the insulating body 1, the coating 2 has been removed along an annular gap 3. The coating can be removed with laser radiation. A second annular gap 4, which interrupts the coating 2, is provided on the outside of the insulating body 1. The coating has also been removed in this gap.
- the two gaps 3 and 4 produce two electrodes 6, 7 which are insulated from one another, each of which extends over part of the inside and over part of the outside of the insulating body. These outer areas of the electrodes 6, 7 are for contacting connection elements, e.g. Wires, usable.
- the second gap 4 can also be arranged on an end face of the insulating body. On the other hand, the end faces, which are also covered by the coating 2, can also be used as connection surfaces.
- the primer 5 consisting of electrically conductive explosives is introduced either as a preformed compact or by subsequent pressing in the interior of the insulating body 1.
- the annular gap 3 is bridged by the primer 5.
- the gap 3 is preferably located in the middle of the length of the primer 5, so that the primer can move in any direction without the surface contact with the parts of the electrodes 6 and 7 located on the inside of the insulating body 1 being lost.
- the ignition element shown in FIG. 2 differs from that of FIG. 1 only in that the gap 3 does not have the shape of a closed ring. Rather, the electrodes 6 and 7 on the inside of the insulating body 1 are connected to one another by an ignition bridge 8 which bridges the gap 3.
- the ignition bridge 8 consists of a region of the conductive coating 2 which remains in the plane of the gap 3. This ignition bridge forms the resistance region at which current heat is generated when a voltage is applied between the electrodes 6 and 7.
- the primer 5 consists of non-conductive primer.
- an axial displacement of the primer is possible without the thermal contact between the primer 5 and the ignition bridge 8 being interrupted.
- the insulating body 1 is also provided with a metallic coating.
- the design of the coating on the inside of the insulating body can correspond to that of FIG. 1 or that of FIG. 2.
- the coating 2 is interrupted by a gap 9 which runs helically or helically around the outside of the insulating body.
- the path of the coating 2 which remains between the turns of the gap 9 forms a coil 10 which can form, for example, the secondary coil of an inductive energy transmission system.
- the ends of the coil form the electrodes 6 and 7, which lead into the interior of the tubular insulating body 1.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Spark Plugs (AREA)
- Organic Insulating Materials (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Paints Or Removers (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
Die Erfindung betrifft ein elektrisches Zünd-oder Anzündelement, enthaltend einen pyrotechnischen Zünd- oder Anzündsatz in einem im wesentlichen rohrförmigen Isolierkörper und zwei Elektroden, die durch eine Zündbrücke oder durch den an ihnen anliegenden elektrisch leitfähigen Bereich des Zünd- oder Anzündsatzes überbrückt sind.The invention relates to an electrical ignition or ignition element, comprising a pyrotechnic ignition or ignition charge in an essentially tubular insulating body and two electrodes which are bridged by an ignition bridge or by the electrically conductive region of the ignition or ignition charge applied to them.
Aus der US-A-4 393 779 sind elektrische Zünd- bzw. Anzündelemente bekannt, bei denen der pyrotechnische Zündsatz in einen Isolierkörper unter Druck eingebracht wird, und der Kontakt zwischen Zündbrücke und Zündsatz durch eine Flächenpressung hergestellt wird. Sie haben den Nachteil, dass bei hohen mechanischen Belastungen der Kontaktverband gelöst werden kann. Um dies zu verhindern, wird der Zündsatz mit hoher Presskraft in den Isolierkörper eingedrückt, so dass er in der Bohrung des Isolierkörpers eine gewisse Spannung erhält. Dieses starke Einpressen ist jedoch dann nicht durchführbar, wenn das Anzündelement Bestandteil einer elektronischen Schaltung ist und erst in dieser mit dem Zündsatz geladen werden kann. Die genannten Schwierigkeiten treten sowohl bei Spaltzündelementen auf, bei denen ein leitfähiger Zündsatz gegen die beiden voneinander isolierten Elektroden gepresst wird, als auch bei Schichtzündelementen, bei denen der Zündsatz auf die die Elektroden verbindende Zündbrücke gepresst wird. In beiden Fällen kann es beispielsweise bei hohen axialen Beschleunigungen zu einer Verschiebung des Zündsatzes kommen, wodurch der Kontakt zwischen Elektroden und Zündsatz bzw. zwischen Zündbrücke und Zündsatz abreisst. Dies führt zu einer Beeinträchtigung der Zündzuverlässigkeit.From US-A-4 393 779 electrical ignition or ignition elements are known, in which the pyrotechnic primer is introduced into an insulating body under pressure, and the contact between the ignition bridge and the primer is made by surface pressure. They have the disadvantage that the contact dressing can be released under high mechanical loads. To prevent this, the primer is pressed into the insulating body with a high pressing force, so that it receives a certain tension in the bore of the insulating body. However, this strong pressing-in is not feasible if the ignition element is part of an electronic circuit and can only be charged with the ignition charge in the electronic circuit. The difficulties mentioned occur both in the case of gap ignition elements in which a conductive ignition charge is pressed against the two electrodes which are insulated from one another, and in the case of stratified ignition elements in which the ignition charge is pressed onto the ignition bridge connecting the electrodes. In both cases, for example at high axial accelerations, the primer may shift, causing the contact between electrodes and primer or between the bridge and primer to tear off. This leads to an impairment of the ignition reliability.
Der Erfindung liegt die Aufgabe zugrunde, ein elektrisches Zünd- oder Anzündelement der eingangs genannten Art zu schaffen, bei dem axiale Verschiebungen des Zündsatzes ohne nachteiligen Einfluss auf die Zündzuverlässigkeit sind.The invention has for its object to provide an electrical ignition or ignition element of the type mentioned, in which axial displacements of the primer have no adverse effect on the ignition reliability.
Die Lösung dieser Aufgabe besteht erfindungsgemäss darin, dass sich die Elektroden an der Innenseite des rohrförmigen Isolierkörpers bis in den Bereich des Zünd- bzw. Anzündsatzes erstrecken.According to the invention, this object is achieved in that the electrodes on the inside of the tubular insulating body extend into the area of the ignition or ignition charge.
Nach der Erfindung befinden sich die Elektroden nicht an einer Stirnseite des Zündsatzes, sondern sie stehen mit der Umfangswand des Zündsatzes in Berührung. Verschiebt sich der Zündsatz im Innern des Isolierkörpers, so wandert er lediglich an den Elektroden entlang, ohne jedoch die Zündfähigkeit zu beeinflussen. Bei Schichtzündelementen bleibt der thermische Kontakt zwischen Zündsatz und Zündbrücke erhalten und bei Spaltzündelementen bleibt der thermische und elektrische Kontakt des Zündsatzes zu beiden Elektroden erhalten, selbst wenn sich der Zündsatz im Innern des ihn umgebenden Isolierkörpers verschieben sollte. Der Innenquerschnitt des Isolierkörpers ist konstant und er entspricht dem Aussenquerschnitt des im Isolierkörper verpressten Zündsatzes.According to the invention, the electrodes are not located on one end face of the primer, but are in contact with the peripheral wall of the primer. If the primer moves inside the insulator, it only moves along the electrodes without affecting the ignitability. With stratified ignition elements, the thermal contact between the primer and the ignition bridge is maintained, and with split ignition elements, the thermal and electrical contact of the primer with both electrodes is retained, even if the primer should move inside the surrounding insulating body. The inside cross section of the insulating body is constant and it corresponds to the outside cross section of the igniter set pressed into the insulating body.
Da Verschiebungen des Zündsatzes sich nicht nachteilig auf die Zündgenauigkeit auswirken, kann die Verpressung im Isolierkörper mit erheblich verringerter Presskraft erfolgen.Since displacements of the primer do not have a detrimental effect on the ignition accuracy, the pressing in the insulating body can take place with a considerably reduced pressing force.
Gemäss einer bevorzugten Weiterbildung der Erfindung bestehen die Elektroden aus einer durch einen Spalt ganz oder teilweise unterbrochenen leitfähigen Beschichtung des Isolierkörpers. Bei Schichtzündelementen trennt der die Beschichtung unterbrechende Spalt die Elektroden nicht vollständig voneinander; es bleibt vielmehr eine Brücke aus der leitfähigen Beschichtung bestehen, welche die Zündbrücke bildet. Bei Spaltzündelementen, bei denen der Zündsatz elektrisch leitfähig ist, sind die beiden Elektroden dagegen an der Innenseite des Isolierkörpers vollständig voneinander getrennt.According to a preferred development of the invention, the electrodes consist of a conductive coating of the insulating body that is completely or partially interrupted by a gap. In the case of stratified ignition elements, the gap which interrupts the coating does not completely separate the electrodes from one another; rather, there remains a bridge made of the conductive coating that forms the ignition bridge. In the case of gap ignition elements in which the primer is electrically conductive, the two electrodes, on the other hand, are completely separated from one another on the inside of the insulating body.
Nach einer ersten Variante ist vorgesehen, dass die Beschichtung sich im wesentlichen über die gesamte Fläche des Isolierkörpers erstreckt und dass die Elektroden durch einen die Beschichtung unterbrechenden zweiten Spalt an der Aussenseite des Isolierkörpers voneinander getrennt sind. Die Elektroden erstrecken sich hierbei um die stirnseitigen Enden des Isolierkörpers herum. Die Kontaktierung, d.h. das Anlöten oder Anschweissen der Verbindungsleitungen, kann an der Aussenseite des Zündelementes durchgeführt werden.According to a first variant, it is provided that the coating extends essentially over the entire surface of the insulating body and that the electrodes are separated from one another by a second gap interrupting the coating on the outside of the insulating body. The electrodes extend around the front ends of the insulating body. The contacting, i.e. the soldering or welding of the connecting lines can be carried out on the outside of the ignition element.
Nach einer zweiten Variante ist vorgesehen, dass die Beschichtung sich im wesentlichen über die gesamte Fläche des Isolierkörpers erstreckt und an der Aussenseite der Umfangswand durch einen wendelförmigen zweiten Spalt unterbrochen ist. Hierdurch entsteht an der Aussenseite des Isolierkörpers eine die beiden Elektroden miteinander verbindende wendelförmige Leiterbahn, die eine Spule bildet. Die beiden Spulenenden sind im Inneren des Isolierkörpers durch die Strombrücke oder durch den elektrisch leitenden Sprengstoff miteinander verbunden. In der Spule kann ein elektromagnetisches Wechselfeld induziert werden, das den Zündstrom liefert. In diesem Fall stellen die Zündbrücke bzw. der leitfähige Zündsatz für die aus der Sekundärspule generierbare elektrische Energie einen ohmschen Verbraucher dar. Hierbei ist es besonders günstig, wenn der die Spule tragende Isolierkörper aus nicht-leitendem Ferritmaterial besteht. Der Isolierkörper wirkt dann gleichzeitig als Spulenkern, indem er die Feldlinien des extern erzeugten Magnetfeldes konzentriert.According to a second variant, it is provided that the coating extends essentially over the entire surface of the insulating body and is interrupted on the outside of the peripheral wall by a helical second gap. This creates a helical conductor track connecting the two electrodes to one another on the outside of the insulating body and forming a coil. The two coil ends are connected to one another in the interior of the insulating body by the current bridge or by the electrically conductive explosive. An electromagnetic alternating field can be induced in the coil, which supplies the ignition current. In this case, the ignition bridge or the conductive primer represents an ohmic consumer for the electrical energy that can be generated from the secondary coil. It is particularly advantageous here if the insulating body carrying the coil consists of non-conductive ferrite material. The insulating body then acts simultaneously as a coil core by concentrating the field lines of the externally generated magnetic field.
Andererseits kann der Isolierkörper auch aus einem Sprengstoff-Bindemittel-Faser-Gemisch bestehen. Hierbei enthält der Isolierkörper, der durch die Fasern und das Bindemittel eine ausreichende mechanische Festigkeit erhält, zusätzlich Sprengstoff, der bei der Zündung zusammen mit dem Sprengstoff des Zündsatzes abbrennt und dessen Wirkung verstärkt.On the other hand, the insulating body can also consist of an explosive-binder-fiber mixture. Here, the insulating body, which is given sufficient mechanical strength by the fibers and the binding agent, also contains explosives which, when ignited, burn together with the explosives of the primer and enhance its effectiveness.
Im folgenden werden unter Bezugnahme auf die Zeichnungen Ausführungsbeispiele der Erfindung näher erläutert.Exemplary embodiments of the invention are explained in more detail below with reference to the drawings.
Es zeigen:
- Fig. 1 einen Längsschnitt durch ein Spaltzündelement,
- Fig. 2 einen Längsschnitt durch ein Schichtzündelement und
- Fig. 3 eine Ansicht eines Zündelementes mit umlaufender Spule, deren Enden mit den Elektroden verbunden sind.
- 1 shows a longitudinal section through a gap ignition element,
- Fig. 2 shows a longitudinal section through a stratified ignition element and
- Fig. 3 is a view of an ignition element with a rotating coil, the ends of which are connected to the electrodes.
Das in Fig. 1 dargestellte Spaltzündelement weist einen rohrförmigen Isolierkörper mit kreisförmigem Querschnitt auf, der z.B. aus A1203 besteht. Der Isolierkörper 1 ist an allen seinen Flächen mit einer elektrisch leitenden Beschichtung 2, z.B. aus Nickel, versehen, die z.B. in einem chemischen oder galvanischen Prozess aufgebracht worden ist. Die Schichtdicke ist an allen Stellen konstant und beträgt zwischen 1 und 4 pm.The gap ignition element shown in Fig. 1 has a tubular insulating body with a circular cross section, which consists for example of A1 2 0 3 . The
An der Innenseite der Umfangswand des lsolierkörpers 1 ist die Beschichtung 2 entlang eines ringförmigen Spaltes 3 entfernt worden. Das Entfernen der Beschichtung kann mit Laserbestrahlung erfolgen. Ein zweiter ringförmiger Spalt 4, der die Beschichtung 2 unterbricht, ist an der Aussenseite des Isolierkörpers 1 vorgesehen. Auch in diesem Spalt ist die Beschichtung entfernt worden. Durch die beiden Spalte 3 und 4 entstehen zwei voneinander isolierte Elektroden 6, 7, von denen jede sich über einen Teil der Innenseite und über einen Teil der Aussenseite des Isolierkörpers erstreckt. Diese aussenliegenden Bereiche der Elektroden 6, 7 sind für die Kontaktierung von Anschlusselementen, z.B. Drähten, nutzbar. Der zweite Spalt 4 kann auch an einer Stirnseite des Isolierkörpers angeordnet sein. Andererseits können als Anschlussflächen auch die Stirnseiten benutzt werden, die ebenfalls von der Beschichtung 2 bedeckt sind.On the inside of the peripheral wall of the
In das Innere des beschichteten Isolierkörpers 1 ist der aus elektrisch leitendem Sprengstoff bestehende Zündsatz 5 entweder als vorgeformter Pressling oder durch nachträgliches Verpressen im Inneren des Isolierkörpers 1 eingebracht. Der ringförmige Spalt 3 wird durch den Zündsatz 5 überbrückt. Der Spalt 3 befindet sich vorzugsweise auf der Mitte der Länge des Zündsatzes 5, so dass der Zündsatz sich in jeder Richtung verschieben kann, ohne dass der Flächenkontakt zu den an der Innenseite des Isolierkörpers 1 befindlichen Teilen der Elektroden 6 und 7 verlorengeht.In the interior of the coated
Das Zündelement, das in Fig. 2 dargestellt ist, unterscheidet sich von demjenigen der Fig. 1 nur dadurch, dass der Spalt 3 nicht die Form eines geschlossenen Ringes hat. Vielmehr sind die Elektroden 6 und 7 an der Innenseite des Isolierkörpers 1 durch eine Zündbrücke 8, die den Spalt 3 überbrückt, miteinander verbunden. Die Zündbrücke 8 besteht aus einem in der Ebene des Spaltes 3 stehengebliebenen Bereich der leitfähigen Beschichtung 2. Diese Zündbrücke bildet den Widerstandsbereich, an dem bei Anlegen einer Spannung zwischen die Elektroden 6 und 7 Stromwärme erzeugt wird. Bei diesem Ausführungsbeispiel besteht der Zündsatz 5 aus nicht-leitendem Zündstoff. Auch hier ist eine axiale Verschiebung des Zündsatzes möglich, ohne dass der thermische Kontakt zwischen Zündsatz 5 und Zündbrücke 8 unterbrochen wird.The ignition element shown in FIG. 2 differs from that of FIG. 1 only in that the
Bei dem Ausführungsbeispiel der Fig. 3 ist der Isolierkörper 1 ebenfalls mit einer metallischen Beschichtung versehen. Die Gestaltung der Beschichtung an der Innenseite des Isolierkörpers kann derjenigen von Fig. 1 oder derjenigen von Fig. 2 entsprechen. An der Aussenseite des Isolierkörpers 1 ist die Beschichtung 2 durch einen Spalt 9 unterbrochen, der wendel- oder schraubenlinienförmig um die Aussenseite des Isolierkörpers herumläuft. Die zwischen den Windungen des Spaltes 9 verbliebene Bahn der Beschichtung 2 bildet eine Spule 10, die beispielsweise die Sekundärspule eines induktiven Energieübertragungssystems bilden kann. Die Enden der Spule bilden die Elektroden 6 und 7, die in das Innere des rohrförmigen Isolierkörpers 1 hineinführen.In the embodiment of FIG. 3, the
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT85113509T ATE44092T1 (en) | 1984-12-20 | 1985-10-24 | ELECTRICAL LIGHTING OR LIGHTING ELEMENT. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19843446415 DE3446415A1 (en) | 1984-12-20 | 1984-12-20 | ELECTRIC IGNITION OR IGNITION ELEMENT |
| DE3446415 | 1984-12-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0191903A1 EP0191903A1 (en) | 1986-08-27 |
| EP0191903B1 true EP0191903B1 (en) | 1989-06-14 |
Family
ID=6253256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP85113509A Expired EP0191903B1 (en) | 1984-12-20 | 1985-10-24 | Electric primer or igniter |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0191903B1 (en) |
| AT (1) | ATE44092T1 (en) |
| DE (2) | DE3446415A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011114633A (en) * | 2009-11-27 | 2011-06-09 | Fujitsu Ltd | Antenna device and system including the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4393779A (en) * | 1977-10-20 | 1983-07-19 | Dynamit Nobel Aktiengesellschaft | Electric detonator element |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT203923B (en) * | 1956-04-30 | 1959-06-10 | Jean Rochat | Electric ignition device and process for its manufacture |
| US3754506A (en) * | 1971-05-07 | 1973-08-28 | Atomic Energy Commission | Spark gap detonator |
| CH643056A5 (en) * | 1978-08-10 | 1984-05-15 | Inventa Ag | ELECTRIC IGNITION DEVICE. |
-
1984
- 1984-12-20 DE DE19843446415 patent/DE3446415A1/en not_active Withdrawn
-
1985
- 1985-10-24 DE DE8585113509T patent/DE3571074D1/en not_active Expired
- 1985-10-24 EP EP85113509A patent/EP0191903B1/en not_active Expired
- 1985-10-24 AT AT85113509T patent/ATE44092T1/en active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4393779A (en) * | 1977-10-20 | 1983-07-19 | Dynamit Nobel Aktiengesellschaft | Electric detonator element |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3571074D1 (en) | 1989-07-20 |
| ATE44092T1 (en) | 1989-06-15 |
| EP0191903A1 (en) | 1986-08-27 |
| DE3446415A1 (en) | 1986-06-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
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