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EP0510551A2 - Amorce-détonateur à pont - Google Patents

Amorce-détonateur à pont Download PDF

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Publication number
EP0510551A2
EP0510551A2 EP92106715A EP92106715A EP0510551A2 EP 0510551 A2 EP0510551 A2 EP 0510551A2 EP 92106715 A EP92106715 A EP 92106715A EP 92106715 A EP92106715 A EP 92106715A EP 0510551 A2 EP0510551 A2 EP 0510551A2
Authority
EP
European Patent Office
Prior art keywords
ignition
bridge
protective film
electrodes
charge
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Withdrawn
Application number
EP92106715A
Other languages
German (de)
English (en)
Other versions
EP0510551A3 (en
Inventor
Uwe Brede
Heinz-Peter Cornelius
Oskar Häring
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
Publication of EP0510551A2 publication Critical patent/EP0510551A2/fr
Publication of EP0510551A3 publication Critical patent/EP0510551A3/de
Withdrawn legal-status Critical Current

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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 invention relates to an electrical bridge ignition means, which for the ignition or ignition of explosives, fuels and. Like. Is suitable.
  • Both types of ignition means have in common that two electrodes are connected to one another by conductive resistance materials.
  • the resistance material consists of a conductive ignitor and in the case of bridge detonators it consists of a narrow wire or metal film.
  • the invention has for its object to provide a bridge ignition means, which is not subject to any restrictions with regard to the choice of the primer used for the ignition charge and can be reproducibly produced with high accuracy and defined ignition behavior.
  • the surface of the electrodes facing the ignition charge and the ignition bridge is covered with a thermally highly conductive, electrically insulating protective film.
  • This protective film primarily prevents the ignition material from coming into contact with both electrodes and the ignition bridge and an electrical shunt to the ignition bridge being able to occur. This ensures that the entire current flows exclusively through the ignition bridge.
  • the protective film also has the property that it is a good thermal conductor, so that it quickly the heat generated at the ignition bridge transferred to the igniter.
  • materials that are good electrical conductors have the property of also being good heat conductors.
  • the properties required of the protective film namely good thermal conductivity and poor electrical conductivity, are opposite to each other.
  • quartz and ceramic materials that combine the desired properties. What is also required is a high resistance of the protective film to the mechanical forces that occur when the primer is pressed on, as well as a high chemical resistance to corrosive substances such as light acids, etc. Suitable materials that meet all of these requirements are, for example, aluminum oxide ceramic or quartz. These materials can be applied by suitable processing techniques, such as high frequency sputtering. Another possibility is to form the protective film by oxidizing or passivating the surfaces of the electrodes and the ignition bridge.
  • the in Figs. 1 and 2 shown bridge ignition means has a tubular metallic jacket 10 which is closed at one end by an inserted cap 11.
  • a pole piece 12 passes through a bore in the cap 11 and is made from an insulating bush 13 against the wall of the bore, e.g. Al2O3, pore-free melted glass or sintered glass is electrically isolated.
  • the cap 11, the pole piece 12 and the bush 13 form the carrier body 14 which closes the jacket 10.
  • the pyrotechnic primer 20 is located in the jacket 10. The entire surface of the metal layer 15 facing this primer is covered with the protective film 21.
  • This protective film 21 consists of electrically insulating, but good heat-conductive material, preferably quartz or ceramic. Suitable materials are SiO2 (quartz) or Al2O3 (aluminum oxide ceramic).
  • the protective film is very thin to achieve good heat transfer. It has a thickness between 0.2 and 1 ⁇ m.
  • the ignition charge 20, which is in direct contact with the protective film 21, can contain metallic components.
  • the ignition current flows through the jacket 10
  • the FIGS. 3 and 4 two pole pieces 12a and 12b are provided, both of which pass through the insulating piece 13 and are in contact with the metal layer 15.
  • the jacket 10 is not flowed through by electricity.
  • the electrodes 16 and 17 are arranged next to one another on the end face of the carrier element 14 and are connected by the ignition bridge 19.
  • the electrode 16 is in contact with the pole piece 12a, while the electrode 17 is in contact with the pole piece 12b.
  • the protective film 21 extends over the two electrodes 16 and 17, the ignition bridge 19 and over the remaining end face of the carrier element 14.
  • the ignition charge 20 contains different layers 20a and 20b in the second embodiment.
  • the layer 20a can be composed, for example, as explained above for the igniter 20 of the first exemplary embodiment, while a mixture of boron and potassium nitrate, black powder or any other flame- or gas-forming mixture can be used for the layer 20b.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Spark Plugs (AREA)
EP19920106715 1991-04-24 1992-04-18 Bridge wire initiator Withdrawn EP0510551A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914113319 DE4113319A1 (de) 1991-04-24 1991-04-24 Bruecken-zuendmittel
DE4113319 1991-04-24

Publications (2)

Publication Number Publication Date
EP0510551A2 true EP0510551A2 (fr) 1992-10-28
EP0510551A3 EP0510551A3 (en) 1993-04-28

Family

ID=6430230

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920106715 Withdrawn EP0510551A3 (en) 1991-04-24 1992-04-18 Bridge wire initiator

Country Status (2)

Country Link
EP (1) EP0510551A3 (fr)
DE (1) DE4113319A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0586133A2 (fr) * 1992-08-27 1994-03-09 Oea, Inc. Construction d'un détonateur entièrement vitré pour un système de gonflage
US5544585A (en) * 1993-05-05 1996-08-13 Ncs Pyrotechnie Et Technologies Electro-pyrotechnical initiator
FR2746461A1 (fr) * 1996-03-21 1997-09-26 Dixi Fresard Microtechniques Dispositif pour la fixation traversante d'un corps axial dans un support
US5672841A (en) * 1995-12-15 1997-09-30 Morton International, Inc. Inflator initiator with zener diode electrostatic discharge protection
WO1998025100A1 (fr) * 1996-12-05 1998-06-11 International Resistive Company, Inc. Igniteur de substrat en ceramique avec pont en tantale nitrure
US6274252B1 (en) 1994-08-04 2001-08-14 Coors Ceramics Company Hermetic glass-to-metal seal useful in headers for airbags
DE10116189A1 (de) * 2001-03-31 2002-10-10 Bosch Gmbh Robert Brückenzünder
WO2004003456A1 (fr) * 2002-07-01 2004-01-08 Special Devices, Incorporated Initiateur a fil d'amorce en contact avec une charge pyrotechnique a bouillie en une position de relativement faible formation du vide
DE102007025871A1 (de) * 2007-06-01 2008-12-04 Sdi Molan Gmbh & Co. Kg Mechanisch robuster Zünder für pyrotechnische Wirkmassen
DE102007025876A1 (de) * 2007-06-01 2008-12-04 Sdi Molan Gmbh & Co. Kg Zünder für pyrotechnische Wirkmassen ohne Zündbrücke
US20200109933A1 (en) * 2018-10-05 2020-04-09 Axon Enterprise, Inc. Systems and methods for ignition in a conducted electrical weapon

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1160949A (fr) * 1955-11-30 1958-08-13 Ici Ltd Tête d'amorce électrique
US3557699A (en) * 1968-06-26 1971-01-26 Olin Mathieson Electroexplosive primer ignition assembly
US3906858A (en) * 1974-07-30 1975-09-23 Us Eneregy Research And Dev Ad Miniature igniter
EP0076746A2 (fr) * 1981-10-05 1983-04-13 ETAT-FRANCAIS représenté par le Délégué Général pour l' Armement Composition pyrotechnique et dispositifs inflammateurs pyrotechniques
JPS58151389A (ja) * 1982-02-25 1983-09-08 細谷火工株式会社 点火薬
EP0314898A1 (fr) * 1987-09-14 1989-05-10 Nippon Koki Co., Ltd. Amorce pour systèmes électriques d'amorçage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1160949A (fr) * 1955-11-30 1958-08-13 Ici Ltd Tête d'amorce électrique
US3557699A (en) * 1968-06-26 1971-01-26 Olin Mathieson Electroexplosive primer ignition assembly
US3906858A (en) * 1974-07-30 1975-09-23 Us Eneregy Research And Dev Ad Miniature igniter
EP0076746A2 (fr) * 1981-10-05 1983-04-13 ETAT-FRANCAIS représenté par le Délégué Général pour l' Armement Composition pyrotechnique et dispositifs inflammateurs pyrotechniques
JPS58151389A (ja) * 1982-02-25 1983-09-08 細谷火工株式会社 点火薬
EP0314898A1 (fr) * 1987-09-14 1989-05-10 Nippon Koki Co., Ltd. Amorce pour systèmes électriques d'amorçage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Week 8342, Derwent Publications Ltd., London, GB; AN 83791378 & JP-A-58 151 389 (HOSOYA KAKO KK) 8. September 1983 *

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0586133A2 (fr) * 1992-08-27 1994-03-09 Oea, Inc. Construction d'un détonateur entièrement vitré pour un système de gonflage
EP0586133A3 (fr) * 1992-08-27 1994-05-18 Oea, Inc. Construction d'un détonateur entièrement vitré pour un système de gonflage
US5404263A (en) * 1992-08-27 1995-04-04 Oea, Inc. All-glass header assembly used in an inflator system
US5544585A (en) * 1993-05-05 1996-08-13 Ncs Pyrotechnie Et Technologies Electro-pyrotechnical initiator
US6274252B1 (en) 1994-08-04 2001-08-14 Coors Ceramics Company Hermetic glass-to-metal seal useful in headers for airbags
US5672841A (en) * 1995-12-15 1997-09-30 Morton International, Inc. Inflator initiator with zener diode electrostatic discharge protection
FR2746461A1 (fr) * 1996-03-21 1997-09-26 Dixi Fresard Microtechniques Dispositif pour la fixation traversante d'un corps axial dans un support
WO1998025100A1 (fr) * 1996-12-05 1998-06-11 International Resistive Company, Inc. Igniteur de substrat en ceramique avec pont en tantale nitrure
DE10116189A1 (de) * 2001-03-31 2002-10-10 Bosch Gmbh Robert Brückenzünder
EP1377791A1 (fr) * 2001-03-31 2004-01-07 Robert Bosch Gmbh Amorce a filament
US6810815B2 (en) 2001-03-31 2004-11-02 Robert Bosch Gmbh Bridge igniter
WO2004003456A1 (fr) * 2002-07-01 2004-01-08 Special Devices, Incorporated Initiateur a fil d'amorce en contact avec une charge pyrotechnique a bouillie en une position de relativement faible formation du vide
DE102007025871A1 (de) * 2007-06-01 2008-12-04 Sdi Molan Gmbh & Co. Kg Mechanisch robuster Zünder für pyrotechnische Wirkmassen
DE102007025876A1 (de) * 2007-06-01 2008-12-04 Sdi Molan Gmbh & Co. Kg Zünder für pyrotechnische Wirkmassen ohne Zündbrücke
US20200109933A1 (en) * 2018-10-05 2020-04-09 Axon Enterprise, Inc. Systems and methods for ignition in a conducted electrical weapon
US10782113B2 (en) * 2018-10-05 2020-09-22 Axon Enterprise, Inc. Systems and methods for ignition in a conducted electrical weapon
US11781847B2 (en) 2018-10-05 2023-10-10 Axon Enterprise, Inc. Ignition device for a conducted electrical weapon

Also Published As

Publication number Publication date
EP0510551A3 (en) 1993-04-28
DE4113319A1 (de) 1992-10-29

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