WO1989007233A1 - Ignition bridge support for priming fuses - Google Patents

Ignition bridge support for priming fuses Download PDF

Info

Publication number
WO1989007233A1
WO1989007233A1 PCT/EP1989/000086 EP8900086W WO8907233A1 WO 1989007233 A1 WO1989007233 A1 WO 1989007233A1 EP 8900086 W EP8900086 W EP 8900086W WO 8907233 A1 WO8907233 A1 WO 8907233A1
Authority
WO
WIPO (PCT)
Prior art keywords
ignition bridge
insulating body
bridge support
contact pin
bore
Prior art date
Application number
PCT/EP1989/000086
Other languages
German (de)
French (fr)
Inventor
Walter Rajner
Richard Bender
Anton Bretfeld
Original Assignee
Hoechst Ceramtec Aktiengesellschaft
Dynamit Nobel Aktiengesellschaft
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 Hoechst Ceramtec Aktiengesellschaft, Dynamit Nobel Aktiengesellschaft filed Critical Hoechst Ceramtec Aktiengesellschaft
Priority to KR1019890701815A priority Critical patent/KR900700845A/en
Publication of WO1989007233A1 publication Critical patent/WO1989007233A1/en

Links

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
    • 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
    • F42B3/103—Mounting initiator heads in initiators; Sealing-plugs
    • 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 ignition bridge support for electrical detonators, in which an insulating body with at least one bore is arranged in a metallic ring, in which a contact pin is fitted as a power supply line and is electrically connected to the metal ring by an ignition bridge.
  • Ignition bridge carriers of the type mentioned which are used for igniting ignition sets, delay sets, pyrotechnic mixtures and for igniting primary substances and sets, are known from DE-A-34 16 735. This
  • Ignition bridge carriers can only be subjected to low mechanical and thermal loads.
  • the invention seeks to remedy this.
  • the contact pin is provided with a bead which defines the position of the contact pin in the bore of the insulating body.
  • two bores are arranged in the insulating body, in which contact pins are fitted as current leads, which are connected to one another in an electrically conductive manner by means of an ignition bridge.
  • the insulating bodies are preferably made of aluminum oxide ceramic with an Al 2 O 3 content> 90%.
  • the outer surface of the insulating body and the walls of its holes can be metallized.
  • the ignition bridge carrier according to the invention offers advantages in its manufacture.
  • the ignition bridge carrier according to the invention offers advantages in its manufacture.
  • FIG. 1 shows a longitudinal section through the ignition bridge support with ignition bridge and Figure 2 is a plan view of the ignition bridge support.
  • the ignition bridge carrier consists of a metallic ring 1, in which an insulating body 2 made of ceramic is arranged.
  • the insulating body 2 can be metallized on its outer surface 6 (not shown). It has two bores in which electrically conductive contact pins 3 are arranged.
  • the contact pins 3 are provided with thickenings 7 in order to fix their position in the bores.
  • Metal ring 1 and insulating body 2 or insulating body 2 and contact pins 3 are connected to each other by brazing at about 800 to 900 ° C. It has certain advantages to provide the ends of the holes with chamfers 8.
  • Solder wells 9 are formed.
  • the two solder wells and thus the contact pins 3 are electrically conductively connected via a metal layer 4 which is applied by sputtering.
  • the actual ignition bridge 5 and thus the resistance between the contact pins 3 can be worked out of the metal layer 4 by means of laser trimming technology known per se. In order to ensure closed metal layers 4, care must be taken that the surface roughness

Abstract

An insulator with at least one bore is arranged in a metal ring in an ignition bridge support for priming fuses. A contact pin which serves as a current input fits into the bore. The current input is electrically connected to the metal ring via an ignition bridge. The contact pin (3) has a swelling (7) which locates the contact pin (3) in the bore of the insulator.

Description

Zündbrückenträger für elektrische Zünder Ignition bridge support for electrical detonators
Gegenstand der Erfindung ist ein Zündbrückenträger für elektrische Zünder, bei dem in einen metallischen Ring ein Isolierkörper mit mindestens einer Bohrung angeordnet ist, in der ein Kontaktstift als Stromzuleitung eingepaßt ist, der durch eine Zündbrücke mit dem Metallring elektrisch verbunden ist.The invention relates to an ignition bridge support for electrical detonators, in which an insulating body with at least one bore is arranged in a metallic ring, in which a contact pin is fitted as a power supply line and is electrically connected to the metal ring by an ignition bridge.
Zündbrückenträger der genannten Art, die zum Anzünden von Anzündsätzen, Verzögerungssätzen, pyrotechnischen Mischungen sowie zur Zündung von Primärstoffen und -sätzen verwendet werden, sind aus der DE-A-34 16 735 bekannt. DieseIgnition bridge carriers of the type mentioned, which are used for igniting ignition sets, delay sets, pyrotechnic mixtures and for igniting primary substances and sets, are known from DE-A-34 16 735. This
Zündbrückenträger sind mechanisch und thermisch nur gering belastbar. Hier will die Erfindung Abhilfe schaffen.Ignition bridge carriers can only be subjected to low mechanical and thermal loads. The invention seeks to remedy this.
Die Aufgabe wird dadurch gelöst, daß der Kontaktstift mit einem Wulst versehen ist, der die Lage des Kontaktstiftes in der Bohrung des Isolierkörpers festlegt.The object is achieved in that the contact pin is provided with a bead which defines the position of the contact pin in the bore of the insulating body.
Bevorzugt sind im Isolierkörper zwei Bohrungen angeordnet, in denen Kontaktstifte als Stromzuleitungen eingepaßt sind, die durch eine Zündbrücke elektrisch leitend miteinander verbunden sind.Preferably, two bores are arranged in the insulating body, in which contact pins are fitted as current leads, which are connected to one another in an electrically conductive manner by means of an ignition bridge.
Die Isolierkörper bestehen bevorzugt aus Aluminiumoxidkeramikmit einem AI2O3 -Gehalt > 90 %. Die Mantelfläche des Isolierkörpers sowie die Wände seiner Bohrungen können metallisiert sein.The insulating bodies are preferably made of aluminum oxide ceramic with an Al 2 O 3 content> 90%. The outer surface of the insulating body and the walls of its holes can be metallized.
Der erfindungsgemäße Zündbrückenträger bietet neben guten mechanischen und thermischen Eigenschaften vor allem Vorteile bei seiner Fertigung. Insbesondere läßt sich dieIn addition to good mechanical and thermal properties, the ignition bridge carrier according to the invention above all offers advantages in its manufacture. In particular, the
Zündbrücke ohne Zwischenbearbeitung mittels Sputterverf ahren auf den Isolierkörper aufbringen und mittels Lasertrimmverfahren auf den gewünschten Widerstandswert bringen. In den Figuren ist der Erfindungsgegenstand in einem Ausführungsbeispiel dargestellt. Es zeigenApply the ignition bridge to the insulating body without intermediate processing using the sputtering process and bring it to the desired resistance value using the laser trimming process. The subject matter of the invention is shown in an exemplary embodiment in the figures. Show it
Figur 1 einen Längsschnitt, durch den Zündbrückenträger mit Zündbrücke und Figur 2 eine Draufsicht auf den Zündbrückenträger.1 shows a longitudinal section through the ignition bridge support with ignition bridge and Figure 2 is a plan view of the ignition bridge support.
Der Zündbrückenträger besteht aus einem metallischen Ring 1, in dem ein Isolierkörper 2 aus Keramik angeordnet ist. Der Isolierkörper 2 kann auf seiner Mantelfläche 6 metallisiert sein (nicht dargestellt). Er besitzt zwei Bohrungen, in denen elektrisch leitende Kontaktstifte 3 angeordnet sind. Die Kontaktstifte 3 sind mit Verdickungen 7 versehen, um ihre Lage in den Bohrungen festzulegen. Metallring 1 und Isolierkörper 2 bzw. Isolierkörper 2 und Kontaktstifte 3 werden durch Hartlöten bei ca. 800 bis 900°C miteinander verbunden. Es bietet gewisse Vorteile, die Enden der Bohrungen mit Fasen 8 zu versehen. Es entstehen Lotmulden 9. Über eine Metallschicht 4, die durch Sputtern aufgebracht wird, sind die beiden Lotmulden und damit die Kontaktstifte 3 elektrisch leitend verbunden. Die eigentliche Zündbrücke 5 und damit der Widerstand zwischen den Kontaktstiften 3 kann mittels an sich bekannter Lasertrimmtechnik aus der Metallschicht 4 herausgearbeitet werden. Um geschlossene Metallschichten 4 zu gewährleisten, ist darauf zu achten, daß die Oberflächenrauhigkeit Ra < 0,55 um beträgt. The ignition bridge carrier consists of a metallic ring 1, in which an insulating body 2 made of ceramic is arranged. The insulating body 2 can be metallized on its outer surface 6 (not shown). It has two bores in which electrically conductive contact pins 3 are arranged. The contact pins 3 are provided with thickenings 7 in order to fix their position in the bores. Metal ring 1 and insulating body 2 or insulating body 2 and contact pins 3 are connected to each other by brazing at about 800 to 900 ° C. It has certain advantages to provide the ends of the holes with chamfers 8. Solder wells 9 are formed. The two solder wells and thus the contact pins 3 are electrically conductively connected via a metal layer 4 which is applied by sputtering. The actual ignition bridge 5 and thus the resistance between the contact pins 3 can be worked out of the metal layer 4 by means of laser trimming technology known per se. In order to ensure closed metal layers 4, care must be taken that the surface roughness is Ra <0.55 μm.

Claims

Patentansprüche: Claims:
1. Zündbrückenträger für elektrische Zünder, bei dem in einem metallischen Ring ein Isolierkörper mit mindestens einer Bohrung angeordnet ist, in der ein Kontaktstift als Stromzuleitung eingepaßt ist, die durch eine Zündbrücke mit dem Metallring elektrisch verbunden ist, dadurch gekennzeichnet, daß der Kontaktstift (3) mit einer Verdickung (7) versehen ist, der die Lage des Kontaktstifes (3) in der Bohrung des Isolierkörpers festlegt.1. Ignition bridge support for electrical detonators, in which an insulating body with at least one bore is arranged in a metallic ring, in which a contact pin is fitted as a power supply line, which is electrically connected to the metal ring by an ignition bridge, characterized in that the contact pin (3 ) is provided with a thickening (7) which defines the position of the contact pin (3) in the bore of the insulating body.
2. Zündbrückenträger für elektrische Zünder, bei dem in einem metallischen Ring ein Isolierkörper mit mindestens zwei Bohrungen angeordnet ist, In denen Kontaktstifte als Stromzuleitungen eingepaßt sind, die durch eine Zündbrücke elektrisch miteinander verbunden sind, dadurch gekennzeichnet, daß die Kontaktstifte (3) mit2. Ignition bridge support for electrical detonators, in which an insulating body with at least two bores is arranged in a metallic ring, in which contact pins are fitted as current leads, which are electrically connected to one another by an ignition bridge, characterized in that the contact pins (3) with
Verdickungen (7) versehen sind, die die Lage der KontaktstifteThickenings (7) are provided, the location of the contact pins
(3) in den Bohrungen festlegen.(3) in the holes.
3. Zündbrückenträger nach Anspruch 1, dadurch gekennzeichnet, daß der Isolierkörper (2) aus3. ignition bridge support according to claim 1, characterized in that the insulating body (2)
Aluminiumoxidkeramik mit einem AI2O3-Gehalt > 90 % besteht.Alumina ceramic with an AI 2 O 3 content> 90%.
4. Zündbrückenträger nach Anspruch 2, dadurch gekennzeichnet, daß die Mantelfläche (6) des4. ignition bridge support according to claim 2, characterized in that the lateral surface (6) of the
Isolierkörpers (2) sowie die Wände seiner Bohrungen metallisiert sind. Insulating body (2) and the walls of its holes are metallized.
PCT/EP1989/000086 1988-02-03 1989-02-02 Ignition bridge support for priming fuses WO1989007233A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019890701815A KR900700845A (en) 1988-02-03 1989-02-02 Ignition Bridge Carrier for Electrical Fuses

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8801280U DE8801280U1 (en) 1988-02-03 1988-02-03
DEG8801280.8U 1988-02-03

Publications (1)

Publication Number Publication Date
WO1989007233A1 true WO1989007233A1 (en) 1989-08-10

Family

ID=6820228

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1989/000086 WO1989007233A1 (en) 1988-02-03 1989-02-02 Ignition bridge support for priming fuses

Country Status (6)

Country Link
KR (1) KR900700845A (en)
DD (1) DD283458A5 (en)
DE (1) DE8801280U1 (en)
PL (1) PL277428A1 (en)
WO (1) WO1989007233A1 (en)
ZA (1) ZA89781B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0929090A2 (en) * 1998-01-08 1999-07-14 Harness System Technologies Research, Ltd. Circuit breaker

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004004748A1 (en) * 2003-03-08 2004-09-23 Dynamit Nobel Ais Gmbh Automotive Ignition Systems Pyroelectric igniter for explosive charge has housing containing capsule with glass filling, support bridge and ignition charge, and has electrical conductor rods embedded in glass
DE102007017679A1 (en) 2007-01-11 2008-07-17 Rheinmetall Waffe Munition Gmbh ignition devices

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB543500A (en) * 1940-05-31 1942-02-27 Hercules Powder Co Ltd Improvements in or relating to electrical firing devices
FR1020616A (en) * 1950-06-21 1953-02-09 Soc Fr Munitions De Chasse Manufacturing process of electric primers for mines or other applications
US2882820A (en) * 1954-08-11 1959-04-21 American Cyanamid Co Electric blasting initiator
US2915012A (en) * 1956-08-08 1959-12-01 American Cyanamid Co Method for assembling ceramic plug to lead wires for electric blasting caps
US2981186A (en) * 1954-09-15 1961-04-25 Richard H F Stresau Electric detonator
US2986090A (en) * 1954-08-23 1961-05-30 Ernst H Doerpinghaus Electric fuses for igniting explosive charges
US3196041A (en) * 1960-11-25 1965-07-20 Gen Lab Associates Inc Method of making a semiconductor gap for an initiator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB543500A (en) * 1940-05-31 1942-02-27 Hercules Powder Co Ltd Improvements in or relating to electrical firing devices
FR1020616A (en) * 1950-06-21 1953-02-09 Soc Fr Munitions De Chasse Manufacturing process of electric primers for mines or other applications
US2882820A (en) * 1954-08-11 1959-04-21 American Cyanamid Co Electric blasting initiator
US2986090A (en) * 1954-08-23 1961-05-30 Ernst H Doerpinghaus Electric fuses for igniting explosive charges
US2981186A (en) * 1954-09-15 1961-04-25 Richard H F Stresau Electric detonator
US2915012A (en) * 1956-08-08 1959-12-01 American Cyanamid Co Method for assembling ceramic plug to lead wires for electric blasting caps
US3196041A (en) * 1960-11-25 1965-07-20 Gen Lab Associates Inc Method of making a semiconductor gap for an initiator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0929090A2 (en) * 1998-01-08 1999-07-14 Harness System Technologies Research, Ltd. Circuit breaker
EP0929090A3 (en) * 1998-01-08 2000-04-05 Harness System Technologies Research, Ltd. Circuit breaker
US6295930B1 (en) 1998-01-08 2001-10-02 Harness System Technologies Research, Ltd. Circuit breaker

Also Published As

Publication number Publication date
DD283458A5 (en) 1990-10-10
ZA89781B (en) 1989-09-27
DE8801280U1 (en) 1988-05-11
PL277428A1 (en) 1989-10-16
KR900700845A (en) 1990-08-17

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