EP0241689A2 - Allumeur à retard pyrotechnique - Google Patents

Allumeur à retard pyrotechnique Download PDF

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Publication number
EP0241689A2
EP0241689A2 EP87102986A EP87102986A EP0241689A2 EP 0241689 A2 EP0241689 A2 EP 0241689A2 EP 87102986 A EP87102986 A EP 87102986A EP 87102986 A EP87102986 A EP 87102986A EP 0241689 A2 EP0241689 A2 EP 0241689A2
Authority
EP
European Patent Office
Prior art keywords
detonator
protection
breakdown protection
detonator according
ignition
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Withdrawn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
EP87102986A
Other languages
German (de)
English (en)
Other versions
EP0241689A3 (fr
Inventor
Otto Dorazil
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.)
Oregon Etablissements fuer Patentverwertung
Original Assignee
Oregon Etablissements fuer Patentverwertung
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 Oregon Etablissements fuer Patentverwertung filed Critical Oregon Etablissements fuer Patentverwertung
Publication of EP0241689A2 publication Critical patent/EP0241689A2/fr
Publication of EP0241689A3 publication Critical patent/EP0241689A3/fr
Withdrawn legal-status Critical Current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
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/34—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected by a blocking-member in the pyrotechnic or explosive train between primer and main charge
    • 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
    • F42B3/16—Pyrotechnic delay initiators

Definitions

  • the invention relates to a detonator with a pyrotechnic deceleration charge arranged between the primer and explosive charge or initial explosive charge and at least one puncture protection device which prevents an ignition transfer from the primer to the explosive charge or initial explosive charge in the complete or partial absence of the delay charge.
  • the currently known and in use breakdown protection in pyrotechnic delay elements have the disadvantage that when the fuse element consisting of a coated heavy metal foil bursts or melts, the further course of the ignition channel can be completely or partially covered or relocated by the resulting particles, thereby making it reliable Ignition transfer to the initial explosive charge, e.g. on the detonator of a hand grenade detonator. Furthermore, when using coated heavy metal foils, a not insignificant environmental impact can be determined.
  • the breakdown protection consists of a flammable or thermally decomposable solid which burns to a large extent without solid residues or which decomposes thermally.
  • the breakdown protection according to the invention in this sense consists of one - but only in connection with the Burn-up of the delay set - material involved in the ignition transmission "active".
  • the requirement that the breakdown protection should prevent the ignition transmission from the primer to the explosive charge or initial explosive charge in the absence of the delay set can be met in such an "active" material in that the ignition or decomposition temperature of the solid of the breakdown protection above that of the ignition beam of the Primer at the location of the breakdown protection gas or particle temperature is, but below the reaction temperature generated by the burned-down delay set.
  • reaction temperatures of approximately 1300 ° C. occur due to the combustion of the delay kit.
  • the particles of the primer In the absence of a delay set, the particles of the primer would hit the puncture protection, which was about 30 to 35 mm away, at about 500 to 600 ° C.
  • a solid would advantageously be used as material for the puncture protection, the ignition or decomposition temperature of which is above 600 ° C. but below 1300 ° C.
  • the breakdown protection according to the invention can consist, for example, of a film made of plastic, such as, for example, of polyamide or of a laminate of plastic, for example with a layer of polyamide and a layer of celluloid, the polyamide predominantly having a buffer function and the celluloid the actual "active" material represents.
  • plastic such as, for example, of polyamide or of a laminate of plastic
  • metal foils can also be used, provided they are flammable and burn essentially without solid residues.
  • Metal-plastic laminates can also be used.
  • Another option would be to use heavy flammable pyrotechnic material, for example of coruscative sets for protection against breakdown, optionally in combination with metal and / or plastic layers.
  • the desired ignition transmission performance of the breakdown protection can be positively influenced by special shaping of the material of the breakdown protection, e.g. through cone, dome or hemisphere shape, as a solid or hollow body.
  • the breakdown protection can, as usual, be arranged between the lowest subsection of the delay set and the detonator, and / or also between subsets of the delay set.
  • the grenade detonator shown consists of a detonator head 1, a spring-loaded racket 2 which is pivotably mounted on the fuse head 1, a safety bracket 3 which holds the racket 2 in a cocked position before the hand grenade is ejected, the safety bracket 3 being secured with the aid of a cotter pin 4 Position on detonator head 1 is held.
  • the ignition tube (labeled 5 overall) is screwed into the interior of the detonator head 1. It contains the primer 6, three subsets of the delay set 7, the breakdown protection 8 and the multilayer detonator charge 9 from top to bottom. The breakdown protection is close to the lower end of the delay set 7, but with a (greater) distance above the detonator charge 9 is arranged.
  • the breakdown protection 8 is conical and consists e.g. made of plastic.
  • the delay set 7 is normally initiated by the primer 6 and, after the predetermined delay time has elapsed, the conical puncture protection 8 is activated, which in turn forwards the ignition beam to the detonator 9.
  • the ignition beam of the primer 4 strikes the breakdown protection 8.
  • a solid, e.g. Plastic used, the ignition temperature (decomposition temperature) is high enough that the ignition energy is not sufficient to activate the material of the breakdown device 8. The ignition beam is interrupted and initiation of the detonator 9 is prevented.
  • Fig. 2 differs from Fig. 1 in that a full body, e.g. Grafting, made of "active" material.
  • the advantage is the additional amplification of the ignition beam.
  • the breakdown protection 8 is arranged between two partial sets (press fractions) 7/1, 7/2 of the delay set 7, the lower 7/2 facing the detonator being smaller. If the delay element is properly manufactured, the firing beam of the primer 6 will initiate the subset 7/1, which subsequently forwards the firing beam to the subset 7/2. If subset 7/1 is now missing, the ignition beam from the primer 6 is not sufficient to activate the breakdown protection 8. The ignition is interrupted, unwanted ignition is thus prevented here too.
  • the ignition tube in this case consists of two sub-tubes 5/1, 5/2 in the area of the delay set, the sub-tube 5/2 being filled with the sub-set 7/2 of the delay charge first, whereupon the breakdown protection 8 is placed and the sub-tube 5/2 is screwed to the partial tube 5/1. Only then is the subset 7/1 filled.
  • a second breakdown protection can also be arranged under the lower subset 7/2 (approximately as in FIG. 1 or 2).
  • the variant according to FIG. 3 shows the use of a coruscative set as a breakdown protection 8.
  • Coruscative consisting of pairs of substances, e.g. made of magnesium silicon, magnesium phosphorus or the like.
  • the coruscative set is molded into the ignition tube 5 in a separate operation before the ignition tube reaches the filling station of the delay set 7.
  • the puncture protection device 8 can also consist of a combination of a corusive set with a film, a plug or the like made of plastic and / or metal.
  • the exemplary embodiments show detonators for hand grenades.
  • the puncture protection according to the invention can also be used with detonators for other types of ammunition and also in non-military fields.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
EP87102986A 1986-03-06 1987-03-03 Allumeur à retard pyrotechnique Withdrawn EP0241689A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT568/86 1986-03-06
AT56886 1986-03-06

Publications (2)

Publication Number Publication Date
EP0241689A2 true EP0241689A2 (fr) 1987-10-21
EP0241689A3 EP0241689A3 (fr) 1989-05-10

Family

ID=3494056

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87102986A Withdrawn EP0241689A3 (fr) 1986-03-06 1987-03-03 Allumeur à retard pyrotechnique

Country Status (1)

Country Link
EP (1) EP0241689A3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0491530A3 (en) * 1990-12-16 1992-12-30 Israel Military Industries Ltd. Delay detonator
RU2160395C2 (ru) * 1998-10-20 2000-12-10 Российский Федеральный Ядерный Центр - Всероссийский Научно-Исследовательский Институт Экспериментальной Физики Пробойник пиромеханический

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2004619A1 (en) * 1970-02-03 1971-08-19 Dynamit Nobel Ag, 5210 Troisdorf Pyrotechnic time fuse
AT364286B (de) * 1979-08-01 1981-10-12 Oregon Ets Patentverwertung Verfahren zur herstellung eines beidseitig offenen zuendroehrchens fuer einen handgranatenzuender

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0491530A3 (en) * 1990-12-16 1992-12-30 Israel Military Industries Ltd. Delay detonator
RU2160395C2 (ru) * 1998-10-20 2000-12-10 Российский Федеральный Ядерный Центр - Всероссийский Научно-Исследовательский Институт Экспериментальной Физики Пробойник пиромеханический

Also Published As

Publication number Publication date
EP0241689A3 (fr) 1989-05-10

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Inventor name: DORAZIL, OTTO