EP0191903B1 - Amorce ou allumeur électrique - Google Patents

Amorce ou allumeur électrique Download PDF

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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
Application number
EP85113509A
Other languages
German (de)
English (en)
Other versions
EP0191903A1 (fr
Inventor
Uwe Brede
Gerhard Kordel
Friedrich Bertram
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dynamit Nobel AG
Original Assignee
Dynamit Nobel AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dynamit Nobel AG filed Critical Dynamit Nobel AG
Priority to AT85113509T priority Critical patent/ATE44092T1/de
Publication of EP0191903A1 publication Critical patent/EP0191903A1/fr
Application granted granted Critical
Publication of EP0191903B1 publication Critical patent/EP0191903B1/fr
Expired legal-status Critical Current

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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)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Paints Or Removers (AREA)
  • Organic Insulating Materials (AREA)

Claims (10)

1. Elément électrique d'amorçage ou d'allumage, contenant une charge pyrotechnique d'amorçage ou d'allumage (5), dans un corps isolant (1) de forme sensiblement tubulaire, et deux électrodes (6, 7) pontées par un pont d'amorçage (8) ou par la zone électriquement conductrice de la charge d'amorçage ou d'allumage, contiguë sur celles-ci, caractérisé en ce que les électrodes (6, 7) s'étendent sur la face interne du corps isolant (1 ) de forme tubulaire, jusque dans la zone de la charge d'amorçage ou d'allumage (5).
2. Elément d'amorçage ou d'allumage selon la revendication 1, caractérisé en ce que les électrodes (6, 7) sont formées d'un revêtement (2) conducteur du corps isolant (1), complètement ou partiellement interrompu par une fente (3).
3. Elément d'amorçage ou d'allumage selon la revendication 2, caractérisé en ce que le revêtement (2) s'étend sensiblement sur la surface totale du corps isolant (1) et en ce que les électrodes (6, 7) sont séparées l'une de l'autre sur le côté extérieur du corps isolant, au moyen d'une deuxième fente (4) interrompant le revêtement.
4. Elément d'amorçage ou d'allumage selon la revendication 2, caractérisé en ce que le revêtement (2) s'étend sensiblement sur la surface totale du corps isolant (1 ) et est interrompu sur le côté extérieur de la paroi périphérique par une deuxième fente (9) en forme de spirale.
5. Elément d'amorçage ou d'allumage selon l'une des revendications 1 à 4, caractérisé en ce que l'épaisseur du revêtement est d'environ 1 à 4 lim.
6. Elément d'amorçage ou d'allumage selon l'une des revendications 1 à 5, caractérisé en ce que le corps isolant se compose de AI203.
7. Elément d'amorçage ou d'allumage selon l'une des revendications 1 à 5, caractérisé en ce que le corps isolant (1 ) se compose de ferrite.
8. Elément d'amorçage ou d'allumage selon l'une des revendications 1 à 5, caractérisé en ce que le corps isolant (1) se compose d'un mélange explosif-liant-fibre.
9. Elément d'amorçage ou d'allumage selon l'une des revendications 1 à 8, caractérisé en ce que le diamètre extérieur du corps isolant est d'environ 4 mm et que le diamètre intérieur est d'environ 2 mm.
10. Elément d'amorçage ou d'allumage selon l'une des revendications 1 à 9, caractérisé en ce que le longueur du corps isolant (1 ) est d'environ 7 mm.
EP85113509A 1984-12-20 1985-10-24 Amorce ou allumeur électrique Expired EP0191903B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85113509T ATE44092T1 (de) 1984-12-20 1985-10-24 Elektrisches zuend- oder anzuendelement.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3446415 1984-12-20
DE19843446415 DE3446415A1 (de) 1984-12-20 1984-12-20 Elektrisches zuend- oder anzuendelement

Publications (2)

Publication Number Publication Date
EP0191903A1 EP0191903A1 (fr) 1986-08-27
EP0191903B1 true EP0191903B1 (fr) 1989-06-14

Family

ID=6253256

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85113509A Expired EP0191903B1 (fr) 1984-12-20 1985-10-24 Amorce ou allumeur électrique

Country Status (3)

Country Link
EP (1) EP0191903B1 (fr)
AT (1) ATE44092T1 (fr)
DE (2) DE3446415A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011114633A (ja) * 2009-11-27 2011-06-09 Fujitsu Ltd アンテナ装置、及びアンテナ装置を含むシステム

Citations (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT203923B (de) * 1956-04-30 1959-06-10 Jean Rochat Elektrische Zündvorrichtung und Verfahren zu ihrer Herstellung
US3754506A (en) * 1971-05-07 1973-08-28 Atomic Energy Commission Spark gap detonator
CH643056A5 (de) * 1978-08-10 1984-05-15 Inventa Ag Elektrische zuendvorrichtung.

Patent Citations (1)

* Cited by examiner, † Cited by third party
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
EP0191903A1 (fr) 1986-08-27
DE3446415A1 (de) 1986-06-26
ATE44092T1 (de) 1989-06-15
DE3571074D1 (de) 1989-07-20

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