EP0518849A2 - Non-electric igniter - Google Patents

Non-electric igniter Download PDF

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Publication number
EP0518849A2
EP0518849A2 EP92890134A EP92890134A EP0518849A2 EP 0518849 A2 EP0518849 A2 EP 0518849A2 EP 92890134 A EP92890134 A EP 92890134A EP 92890134 A EP92890134 A EP 92890134A EP 0518849 A2 EP0518849 A2 EP 0518849A2
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EP
European Patent Office
Prior art keywords
firing pin
primer
holder
ignition
striking pin
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.)
Granted
Application number
EP92890134A
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German (de)
French (fr)
Other versions
EP0518849B1 (en
EP0518849A3 (en
Inventor
Peter Rekas
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.)
Schaffler and Co GmbH
Original Assignee
Schaffler and Co GmbH
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 Schaffler and Co GmbH filed Critical Schaffler and Co GmbH
Publication of EP0518849A2 publication Critical patent/EP0518849A2/en
Publication of EP0518849A3 publication Critical patent/EP0518849A3/en
Application granted granted Critical
Publication of EP0518849B1 publication Critical patent/EP0518849B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/04—Arrangements for ignition

Definitions

  • the invention relates to a non-electric detonator which has a primer charge, optionally provided with a delay set, in a sleeve closed on one side, which is sealed by a primer inserted into a holder against the open end of the sleeve, into which an ignition hose opens, in the region of its mouth a firing pin for the primer is movably arranged.
  • a detonator of the aforementioned type has been described in EP-A1 0253955, in particular Fig. 4.
  • the ignition hose i.e. the chemical substance contained in it
  • the resulting pressure wave propagates at high speed and throws the firing pin against the primer, which ultimately detonates the primer charge.
  • the firing pin is partly guided in the ignition hose and partly in the primer holder.
  • this has proven to be disadvantageous, since when the igniter is pressed (inserting the ignition hose into the sleeve with the interposition of an elastic plug and then squeezing the sleeve), the ignition hose is sometimes narrowed, which can block the mobility of the firing pin.
  • the effective area of the firing pin fogged up by the gas pressure is limited to the cross section of the ignition hose.
  • the aim of the invention is to eliminate the disadvantages mentioned above. This is achieved according to the invention in that the holder is essentially hollow cylindrical and the firing pin is guided entirely in it.
  • the primer is simply inserted into the holder, but is not exactly fixed in position. Due to different starting distances between firing pin and primer, the trigger behavior of the detonators can vary. In order to avoid this disadvantage, it is recommended according to the invention to hold the primer in the holder by means of a support tube surrounding the firing pin. The maximum distance between firing pin and primer is clearly defined by this.
  • firing pins for non-electric detonators are such that the surface to be acted upon by the gas pressure is on one end, and the protrusion penetrating into the primer is on the other end.
  • the firing pin is designed symmetrically with respect to a plane perpendicular to its axis.
  • the firing pin can be used on both sides, so it can be installed without any attention to its position.
  • FIG. 1 shows a longitudinal section through a non-electrical detonator according to the invention
  • FIG. 2 shows an enlarged detail from FIG. 1
  • FIG. 3 shows a detail of FIGS. 1 and 2 in an enlarged manner.
  • the non-electrical detonator shown consists of a sleeve 03 closed on one side, into the open end of which an ignition hose 01 opens and is fixed therein by pressing the sleeve 03 with the interposition of an elastic stopper 02.
  • a firing pin 04 is movably guided in a hollow cylindrical holder 05 in the mouth region of the ignition hose 01.
  • a primer 07 is held down by a support tube 06 encompassing the firing pin 04.
  • the firing pin 04 is advantageously designed so that it has properties on both sides that make it possible to ignite a primer. This has the advantage that the firing pin 04 can be installed in any position.
  • the firing pin 04 and the primer 07 there is an elastic, approximately spherical body 08, which acts like a compression spring.
  • This elastic body 08 holds the firing pin 04 securely in the starting position (see in particular FIG. 3).
  • the holder 05 and the support tube 06 are crimped in a common operation. As a result, the diameter of the support tube 06 is reduced to such an extent that the ignition hose 01 does not touch the firing pin 04 during the subsequent assembly.
  • the holder 05 is fixed in position in the sleeve 03 between a constriction 14 and the compression in the area of the elastic stopper 02.
  • the holder 05 is drawn into the sleeve 03 in a metal-tight manner and thus seals off all chemical components of the igniter.
  • an ignition charge consisting of initial charge 11 and base charge 12, which in the present exemplary embodiment is preceded by a delay set 10 accommodated in a delay element 09, a gas space 13 still remaining free.
  • the pneumatic energy strikes the firing pin 04, which is fired in the direction of the arrow (FIG. 3).
  • the firing pin 04 overcomes the elastic body 08 and ignites the primer 07, which subsequently ignites the delay set 10 in the delay element 09.
  • the gas tap 13, in which the combustion gases collect, remains closed, thereby achieving a high accuracy of the delay time.
  • the flame reaches the initial charge 11, which subsequently ignites the basic charge 12, whereupon the detonator detonates.

Abstract

Non-electrical igniter which possesses, in a sleeve (03) closed on one side, an ignition charge (11, 12) equipped, if appropriate, with a delayed-action composition (10) and sealed off from the open sleeve end by a percussion cap (07) which is inserted into a holder (05) and into which opens an ignition tube (01), in the opening region of which a striking pin (04) for the percussion cap (07) is arranged so as to be movable. To guarantee a perfect movability of the striking pin (04) and a maximum conversion of the pressure energy, the holder (05) is made essentially hollow-cylindrical and the striking pin (04) is guided completely in the latter. Between the percussion cap (07) and the striking pin (04) there can be an elastic body (08) through which the latter can pass during ignition and which holds the striking pin (04) securely in its initial position. …<IMAGE>…

Description

Die Erfindung bezieht sich auf einen nicht-elektrischen Sprengzünder, der in einer einseitig geschlossenen Hülse eine gegebenenfalls mit einem Verzögerungssatz versehene Zündladung aufweist, die durch ein in einen Halter eingesetztes Zündhütchen gegen das offene Hülsenende abgedichtet ist, in welches ein Zündschlauch einmündet, in dessen Einmündungsbereich ein Schlagbolzen für das Zündhütchen beweglich angeordnet ist.The invention relates to a non-electric detonator which has a primer charge, optionally provided with a delay set, in a sleeve closed on one side, which is sealed by a primer inserted into a holder against the open end of the sleeve, into which an ignition hose opens, in the region of its mouth a firing pin for the primer is movably arranged.

Ein Sprengzünder der vorgenannten Bauart ist in der EP-A1 0253955, insbesondere Fig. 4 beschrieben worden. Wird bei diesem der Zündschlauch (d.h. in ihm enthaltene chemische Substanz) gezündet, pflanzt sich die entstehende Druckwelle mit hoher Geschwindigkeit fort und schleudert den Schlagbolzen gegen das Zündhütchen, wodurch letztlich die Zündladung zur Detonation gebracht wird. Der Schlagbolzen wird dabei teilweise im Zündschlauch, teilweise im Halter des Zündhütchens geführt. Dies hat sich allerdings als nachteilig erwiesen, da beim Verpressen des Zünders (Einsetzen des Zündschlauchs in die Hülse unter Zwischenschaltung eines elastischen Stopfens und anschließendes Quetschen der Hülse) der Zündschlauch mitunter eingeengt wird, was zu einer Blockierung der Beweglichkeit des Schlagbolzens führen kann. Überdies ist dadurch die vom Gasdruck beschlagte wirksame Fläche des Schlagbolzens auf den Querschnitt des Zündschlauches beschränkt.A detonator of the aforementioned type has been described in EP-A1 0253955, in particular Fig. 4. If the ignition hose (i.e. the chemical substance contained in it) is ignited, the resulting pressure wave propagates at high speed and throws the firing pin against the primer, which ultimately detonates the primer charge. The firing pin is partly guided in the ignition hose and partly in the primer holder. However, this has proven to be disadvantageous, since when the igniter is pressed (inserting the ignition hose into the sleeve with the interposition of an elastic plug and then squeezing the sleeve), the ignition hose is sometimes narrowed, which can block the mobility of the firing pin. Moreover, the effective area of the firing pin fogged up by the gas pressure is limited to the cross section of the ignition hose.

Ziel der Erfindung ist die Beseitigung der vorstehend erwähnten Nachteile. Dies gelingt erfindungsgemäß dadurch, daß der Halter im wesentlichen hohlzylindrisch ausgebildet und der Schlagbolzen zur Gänze in ihm geführt ist.The aim of the invention is to eliminate the disadvantages mentioned above. This is achieved according to the invention in that the holder is essentially hollow cylindrical and the firing pin is guided entirely in it.

Da der Schlagbolzen nunmehr zur Gänze im hohlzylindrischen Halter geführt ist, besteht keine Gefahr mehr, daß seine Beweglichkeit durch das Quetschen der Hülse im Zuge der Zünderherstellung beeinträchtigt wird. Überdies ist nunmehr sein Gesamtquerschnitt der Druckwelle ausgesetzt, was eine maximale Schlagwirkung ergibt.Since the firing pin is now completely guided in the hollow cylindrical holder, there is no longer any danger that its mobility will be impaired by squeezing the sleeve in the course of the manufacture of the igniter. Moreover, is now its entire cross-section is exposed to the pressure wave, which gives maximum impact.

Ein weiterer Nachteil des aus der EP-A1 0253955 bekannten Sprengzünders ist, daß der Schlagbolzen etwa beim Hinunterfallen des Zünders jederzeit auf das Zündhütchen treffen kann und so eine unbeabsichtigte Zündung herbeiführen könnte. Im Einklang mit der Erfindung wird dies nunmehr dadurch vermieden, daß zwischen dem Zündhütchen und dem Schlagbolzen ein von diesen beim Zünden durchsetzbarer, elastischer Körper vorgesehen ist. Dieser elastische Körper hält den Schlagbolzen in sicherer Entfernung vom Zündhütchen, bis er durch die Stoßwelle vorwärtsgetrieben wird. Ein zufälliges, unbeabsichtigtes Auslösen des Zünders wird dadurch absolut verhindert.Another disadvantage of the detonator known from EP-A1 0253955 is that the firing pin can hit the primer at any time, for example when the detonator falls down, and could thus cause unintended ignition. In accordance with the invention, this is now avoided by providing between the primer and the firing pin an elastic body which can be pushed through during ignition. This elastic body keeps the firing pin at a safe distance from the primer until it is propelled by the shock wave. Accidental, unintentional triggering of the igniter is absolutely prevented.

Bei den bekannten, nicht-elektrischen Sprengzündern ist das Zündhütchen in den Halter bloß eingeschoben, in diesem aber lagemäßig nicht exakt fixiert. Dies kann durch unterschiedliche Ausgangsabstände zwischen Schlagbolzen und zündhütchen zu variierenden Auslöseverhalten der Sprengzünder führen. Um diesen Nachteil zu vermeiden, empfiehlt es sich erfindungsgemäß, das Zündhütchen im Halter durch ein den Schlagbolzen umfangendes Stützrohr festzuhalten. Der Maximalabstand zwischen Schlagbolzen und Zündhütchen ist hiedurch eindeutig festgelegt.In the known, non-electric detonators, the primer is simply inserted into the holder, but is not exactly fixed in position. Due to different starting distances between firing pin and primer, the trigger behavior of the detonators can vary. In order to avoid this disadvantage, it is recommended according to the invention to hold the primer in the holder by means of a support tube surrounding the firing pin. The maximum distance between firing pin and primer is clearly defined by this.

Die übliche Ausgestaltung von Schlagbolzen für nichtelektrische Sprengzünder ist derart, daß sich auf einer Stirnseite die vom Gasdruck zu beaufschlagende Fläche, auf der anderen Stirnseite der in das Zündhütchen eindringende Vorsprung befindet. Beim Zusammenbau des Zünders ist daher auf eine bestimmte Orientierung des Schlagbolzens zu achten. Dieser Fertigungsaufwand kann vermieden werden, wenn der Schlagbolzen bezüglich einer senkrecht auf seine Achse stehenden Ebene symmetrisch gestaltet ist. Durch diese Ausführung ist der Schlagbolzen zweiseitig verwendbar, kann also ohne jegliche Aufmerksamkeit bezüglich seiner Lage eingebaut werden.The usual design of firing pins for non-electric detonators is such that the surface to be acted upon by the gas pressure is on one end, and the protrusion penetrating into the primer is on the other end. When assembling the detonator, pay attention to a certain orientation of the firing pin. This manufacturing effort can be avoided if the firing pin is designed symmetrically with respect to a plane perpendicular to its axis. Through this Version, the firing pin can be used on both sides, so it can be installed without any attention to its position.

Die Erfindung wird im folgenden an Hand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert. Es zeigen Fig. 1 einen Längsschnitt durch einen erfindungsgemäßen nichtelektrischen Sprengzünder, Fig. 2 ein vergrößerten Ausschnitt aus Fig. 1 und Fig. 3 ein Detail der Fig. 1 bzw. 2 in Vergrößerung.The invention is explained below with reference to an embodiment shown in the drawing. 1 shows a longitudinal section through a non-electrical detonator according to the invention, FIG. 2 shows an enlarged detail from FIG. 1 and FIG. 3 shows a detail of FIGS. 1 and 2 in an enlarged manner.

Der dargestellte nicht-elektrische Sprengzünder besteht aus einer einseitig geschlossenen Hülse 03, in deren offenes Ende ein Zündschlauch 01 einmündet und in diesem durch eine Verpressung der Hülse 03 unter Zwischenschaltung eines elastischen Stopfens 02 fixiert ist. Im Einmündungsbereich des Zündschlauches 01 ist ein Schlagbolzen 04 in einem hohlzylindrischen Halter 05 beweglich geführt. Am Grunde des Halters 05 ist ein Zündhütchen 07 durch ein den Schlagbolzen 04 umfangendes Stützrohr 06 niedergehalten. Der Schlagbolzen 04 ist vorteilhafterweise so ausgebildet, daß er auf beiden Seiten Eigenschaften hat, die es ermöglichen, ein Zündhütchen zu zünden. Das hat den Vorteil, daß der Schlagbolzen 04 lageunabhängig eingebaut werden kann. Zwischen dem Schlagbolzen 04 und dem Zündhütchen 07 befindet sich ein elastischer, etwa kugelförmiger Körper 08, der wie eine Druckfeder wirkt. Dieser elastische Körper 08 hält den Schlagbolzen 04 sicher in der Ausgangsposition (siehe insbesondere Fig. 3). Der Halter 05 und das Stützrohr 06 werden in einem gemeinsamen Arbeitsgang gebördelt. Dadurch wird der Durchmesser des Stützrohres 06 soweit verkleinert, daß bei der späteren Montage der Zündschlauch 01 den Schlagbolzen 04 nicht berührt. In der Hülse 03 ist der Halter 05 zwischen einer Verengung 14 und der Verpressung im Bereich des elastischen Stopfens 02 lagemäßig fixiert. Der Halter 05 ist in die Hülse 03 metallisch dicht eingezogen und dichtet so alle chemischen Bestandteile des Zünders ab. Im Raum zwischen dem Halter 05 und dem Grund der Hülse 03 befindet sich eine aus Initialladung 11 und Grundladung 12 bestehende Zündladung, der im vorliegenden Ausführungsbeispiel ein in einem Verzögerungselement 09 untergebrachter Verzögerungssatz 10 vorgelagert ist, wobei noch ein Gasraum 13 freibleibt.The non-electrical detonator shown consists of a sleeve 03 closed on one side, into the open end of which an ignition hose 01 opens and is fixed therein by pressing the sleeve 03 with the interposition of an elastic stopper 02. A firing pin 04 is movably guided in a hollow cylindrical holder 05 in the mouth region of the ignition hose 01. At the base of the holder 05, a primer 07 is held down by a support tube 06 encompassing the firing pin 04. The firing pin 04 is advantageously designed so that it has properties on both sides that make it possible to ignite a primer. This has the advantage that the firing pin 04 can be installed in any position. Between the firing pin 04 and the primer 07 there is an elastic, approximately spherical body 08, which acts like a compression spring. This elastic body 08 holds the firing pin 04 securely in the starting position (see in particular FIG. 3). The holder 05 and the support tube 06 are crimped in a common operation. As a result, the diameter of the support tube 06 is reduced to such an extent that the ignition hose 01 does not touch the firing pin 04 during the subsequent assembly. The holder 05 is fixed in position in the sleeve 03 between a constriction 14 and the compression in the area of the elastic stopper 02. The holder 05 is drawn into the sleeve 03 in a metal-tight manner and thus seals off all chemical components of the igniter. In the space between the holder 05 and the base of the sleeve 03 is an ignition charge consisting of initial charge 11 and base charge 12, which in the present exemplary embodiment is preceded by a delay set 10 accommodated in a delay element 09, a gas space 13 still remaining free.

Wird der Zündschlauch 01 gezündet, so trifft die pneumatische Energie schockartig auf den Schlagbolzen 04, der in Pfeilrichtung (Fig. 3) geschoßen wird. Dabei überwindet der Schlagbolzen 04 den elastischen Körper 08 und zündet das Zündhütchen 07, welches in weiterer Folge den Verzögerungssatz 10 in Verzögerungselement 09 anzündet. Der Gashahn 13, in dem sich die Verbrennungsgase sammeln, bleibt dabei geschlossen, womit eine hohe Genauigkeit der Verzögerungszeit erreicht wird. Nach Durchbrand des pyrotechnischen Verzögerungssatzes 10 erreicht die Flamme die Initialladung 11, die in weiterer Folge die Grundladung 12 zündet, worauf der Zünder detoniert.If the ignition hose 01 is ignited, the pneumatic energy strikes the firing pin 04, which is fired in the direction of the arrow (FIG. 3). The firing pin 04 overcomes the elastic body 08 and ignites the primer 07, which subsequently ignites the delay set 10 in the delay element 09. The gas tap 13, in which the combustion gases collect, remains closed, thereby achieving a high accuracy of the delay time. After the pyrotechnic delay set 10 has burned through, the flame reaches the initial charge 11, which subsequently ignites the basic charge 12, whereupon the detonator detonates.

Claims (4)

Nicht-elektrischer Sprengzünder, der in einer einseitig geschlossenen Hülse (03) eine gegebenenfalls mit einem Verzögerungssatz (10) versehene Zündladung (11, 12) aufweist, die durch ein in einen Halter (05) eingesetztes Zündhütchen (07) gegen das offene Hülsenende abgedichtet ist, in welches ein Zündschlauch (01) einmündet, in dessen Einmündungsbereich ein Schlagbolzen (04) für das Zündhütchen (07) beweglich angeordnet ist, dadurch gekennzeichnet, daß der Halter (05) im wesentlichen hohlzylindrisch ausgebildet und der Schlagbolzen (04) zur Gänze in ihm geführt ist.Non-electric detonator which has a priming charge (11, 12) in a sleeve (03) which is closed on one side and which is optionally provided with a delay set (10) and which is sealed off from the open sleeve end by a primer (07) inserted in a holder (05) into which an ignition hose (01) opens, in the opening area of which a firing pin (04) for the primer (07) is movably arranged, characterized in that the holder (05) is essentially hollow-cylindrical and the firing pin (04) entirely is in it. Sprengzünder nach Anspruch 1, dadurch gekennzeichnet, daß zwischen dem Zündhütchen (07) und dem Schlagbolzen (04) ein von diesem beim Zünden durchsetzbarer, elastischer Körper (08) vorgesehen ist.Detonator according to claim 1, characterized in that between the primer (07) and the firing pin (04) there is provided an elastic body (08) which can be pushed through during ignition. Sprengzünder nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, daß das Zündhütchen (07) im Halter (05) durch ein den Schlagbolzen (04) umfangendes Stützrohr (06) festgehalten ist.Detonator according to claims 1 or 2, characterized in that the primer (07) is held in the holder (05) by a support tube (06) surrounding the firing pin (04). Sprengzünder nach einem der Ansprüche 1 und 3, dadurch gekennzeichnet, daß der Schlagbolzen (04) bezüglich einer senkrecht auf seine Achse stehenden Ebene symmetrisch gestaltet ist.Detonator according to one of claims 1 and 3, characterized in that the firing pin (04) is designed symmetrically with respect to a plane perpendicular to its axis.
EP92890134A 1991-06-13 1992-06-02 Non-electric igniter Expired - Lifetime EP0518849B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1190/91 1991-06-13
AT0119091A AT396302B (en) 1991-06-13 1991-06-13 NON-ELECTRIC IGNITION

Publications (3)

Publication Number Publication Date
EP0518849A2 true EP0518849A2 (en) 1992-12-16
EP0518849A3 EP0518849A3 (en) 1993-11-18
EP0518849B1 EP0518849B1 (en) 1995-09-06

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EP92890134A Expired - Lifetime EP0518849B1 (en) 1991-06-13 1992-06-02 Non-electric igniter

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US (1) US5259315A (en)
EP (1) EP0518849B1 (en)
AT (1) AT396302B (en)
AU (1) AU653820B2 (en)
CA (1) CA2071156A1 (en)
DE (1) DE59203536D1 (en)
ES (1) ES2078023T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103743301A (en) * 2013-12-27 2014-04-23 雅化集团绵阳实业有限公司 Water-resistant type long-second delay electric detonator and manufacturing method thereof

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IL108452A0 (en) * 1994-01-27 1994-11-11 Feigelson Leonid Autonomous electric detonator
WO1999012872A1 (en) * 1997-09-05 1999-03-18 The Ensign-Bickford Company Self-contained percussion output device
US6675896B2 (en) 2001-03-08 2004-01-13 Halliburton Energy Services, Inc. Detonation transfer subassembly and method for use of same
US20100300315A1 (en) * 2007-12-03 2010-12-02 Master Blaster Proprietary Limited Multi-Port Transmission Line Connector
CN101303218B (en) * 2008-04-07 2011-06-01 中国科学技术大学 Combustion type deferred blasting cap and deferred elements thereof
CN103033101B (en) * 2012-12-27 2015-06-17 雅化集团绵阳实业有限公司 Novel long-second delay electric detonator and production process thereof
CN105066799A (en) * 2015-08-05 2015-11-18 宏大矿业有限公司 Split assembled non-priming explosive non-electric detonating tube detonator
CN106767206B (en) * 2016-12-22 2018-01-30 河北工程大学 A kind of safety blasting device

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US2857845A (en) * 1954-09-29 1958-10-28 Olin Mathieson Explosive device
US3106892A (en) * 1961-12-27 1963-10-15 Du Pont Initiator
US3129663A (en) * 1961-08-11 1964-04-21 Aircraft Armaments Inc Fittings for low energy detonating cord
US3238873A (en) * 1964-10-13 1966-03-08 Teledyne Inc Detonating fuse termination
US3354826A (en) * 1966-10-24 1967-11-28 Carl A Axelson Multiple explosive, line charge, package
US4378739A (en) * 1981-03-23 1983-04-05 The United States Of America As Represented By The Secretary Of The Navy Primer firing means
EP0129350A2 (en) * 1983-06-20 1984-12-27 Geo Vann, Inc. Method and apparatus for detecting firing of perforating gun
EP0253955A1 (en) * 1986-04-26 1988-01-27 Dynamit Nobel Aktiengesellschaft Time fuze for blasting

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US1198644A (en) * 1916-03-31 1916-09-19 Henry F Loomis Fuse mechanism for projectiles.
US3791256A (en) * 1969-09-12 1974-02-12 Colt Ind Operating Corp Machine gun
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Publication number Priority date Publication date Assignee Title
US2857845A (en) * 1954-09-29 1958-10-28 Olin Mathieson Explosive device
US3129663A (en) * 1961-08-11 1964-04-21 Aircraft Armaments Inc Fittings for low energy detonating cord
US3106892A (en) * 1961-12-27 1963-10-15 Du Pont Initiator
US3238873A (en) * 1964-10-13 1966-03-08 Teledyne Inc Detonating fuse termination
US3354826A (en) * 1966-10-24 1967-11-28 Carl A Axelson Multiple explosive, line charge, package
US4378739A (en) * 1981-03-23 1983-04-05 The United States Of America As Represented By The Secretary Of The Navy Primer firing means
EP0129350A2 (en) * 1983-06-20 1984-12-27 Geo Vann, Inc. Method and apparatus for detecting firing of perforating gun
EP0253955A1 (en) * 1986-04-26 1988-01-27 Dynamit Nobel Aktiengesellschaft Time fuze for blasting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103743301A (en) * 2013-12-27 2014-04-23 雅化集团绵阳实业有限公司 Water-resistant type long-second delay electric detonator and manufacturing method thereof

Also Published As

Publication number Publication date
AU1818092A (en) 1992-12-17
CA2071156A1 (en) 1992-12-14
AT396302B (en) 1993-08-25
AU653820B2 (en) 1994-10-13
EP0518849B1 (en) 1995-09-06
EP0518849A3 (en) 1993-11-18
ATA119091A (en) 1992-11-15
DE59203536D1 (en) 1995-10-12
ES2078023T3 (en) 1995-12-01
US5259315A (en) 1993-11-09

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