EP1995551A1 - Allumeur/initiateur - Google Patents

Allumeur/initiateur Download PDF

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Publication number
EP1995551A1
EP1995551A1 EP07108759A EP07108759A EP1995551A1 EP 1995551 A1 EP1995551 A1 EP 1995551A1 EP 07108759 A EP07108759 A EP 07108759A EP 07108759 A EP07108759 A EP 07108759A EP 1995551 A1 EP1995551 A1 EP 1995551A1
Authority
EP
European Patent Office
Prior art keywords
explosive
housing
modules
module
igniter
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Withdrawn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
EP07108759A
Other languages
German (de)
English (en)
Inventor
Mikael Strohmaier
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.)
Saab AB
Original Assignee
Saab AB
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 Saab AB filed Critical Saab AB
Priority to EP07108759A priority Critical patent/EP1995551A1/fr
Publication of EP1995551A1 publication Critical patent/EP1995551A1/fr
Withdrawn legal-status Critical Current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
    • F42B3/195—Manufacture
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/02—Cartridges, i.e. cases with charge and missile
    • F42B5/16—Cartridges, i.e. cases with charge and missile characterised by composition or physical dimensions or form of propellant charge, with or without projectile, or powder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C14/00—Mechanical fuzes characterised by the ammunition class or type
    • F42C14/02—Mechanical fuzes characterised by the ammunition class or type for hand grenades
    • F42C14/025—Mechanical fuzes characterised by the ammunition class or type for hand grenades having electric igniters

Definitions

  • the present invention concerns an igniter/initiator.
  • An igniter or initiator, blasting cap, detonator in the following called igniter, is used for igniting, initiating or detonating an energetic device, such as main charge of a warhead or a pyrotechnic device.
  • the igniter conventionally consists of a housing having an open cavity containing an explosive or two or more layers of different explosives.
  • the most sensitive explosive, the primary explosive is arranged at one end of the housing and is in contact with a means of initiating, such as an electric wire, a bridge wire igniter, a flex card, a capton film or some other means.
  • a less sensitive explosive may be arranged, such as a secondary explosive or a booster charge.
  • the initiating means starts an explosive train by igniting the primary explosive, which ignites or detonates the secondary explosive and in the end ignites or initiates the main charge.
  • igniters are required to ignite different main charges. Some igniters may comprise within the housing only a primary explosive. Some may contain two or more layers of explosive. Some igniters contain small amounts of the different explosives, some contain larger amounts. Further different kinds of igniting means are used on the igniters. All these different types of igniters must be available for mounting.
  • Another object is to achieve less expensive igniters.
  • Still another object is to achieve a simplified production line.
  • a further object is to decrease the risk at producing igniters.
  • the igniter in the form of modules.
  • the igniter is produced by assembling the desired modules. This may take place any time before the igniter is to be used.
  • an igniter system comprises, as different parts or modules, tubular housing modules open at one or both ends.
  • the housing modules are for instance made of metal or plastic.
  • tubular explosive modules containing explosive and having essentially the same outer shape and size as the inner section of the housing modules.
  • These tubular explosive modules may have differing inner sections and/or heights and may all contain the same kind of explosive or may contain different kinds of explosives.
  • starter modules to fit the open end of the housing and containing different means of ignition, such as electric wire, a bridge wire igniter, a flex card or a capton film.
  • the starter modules have an end surface comprising connecting means intended to be connected to a device delivering an initiating signal, such as laser energy or an electric current.
  • a tubular explosive module comprises a tubular sleeve with the same outer shape and form as the inner shape and size of the housing module into which it is intended to be inserted.
  • the sleeve is filled with an explosive.
  • the sleeve is suitably made of metal or plastic.
  • the explosive modules comprise primary explosive modules where the sleeves are filled with a primary explosive.
  • the same type of explosive may be used in other explosive modules, booster modules, where the primary explosive is compacted to a higher density and thus is made less sensitive.
  • the inner section and height of sleeves of the tubular explosive modules decide the amount of explosive to be enclosed therein.
  • the explosives may also be packed to different densities inside the module and in this way identical tubular modules may contain different amounts of the same kind of explosive.
  • An igniter is produced by assembling the modules, placing the explosive containing modules inside the housing module, one of the explosive modules containing a primary explosive.
  • the primary explosive is arranged at one end of the pile of modules and outside this module a starter module is arranged. If the housing is closed at one end, the explosive containing modules are piled against the closed end, the primary module last, with the starter module thereafter with the connecting means accessible from the open end of the housing module.
  • a filling material such as a polymer or glue, is used to fill out open spaces within the housing and to stabilize the pile of modules. Thereafter the open end of the housing is closed partly to hold the modules securely within the housing.
  • the connecting means of the starter module must remain accessible. The closing of the housing end may be performed by bending the tubular end inwards against the starter module, by welding or soldering, for example.
  • one opening has a smaller section than the inner section of the housing.
  • the starter module is inserted first with the end surface comprising connecting means arranged against this smaller opening and with the connecting means accessible through the opening. Thereafter the primary module is inserted, followed by the other explosive modules, where after the large opening is closed, such as by welding a sheet metal against the housing.
  • the end having the smaller opening may also be sealed, if necessary.
  • the connecting means must remain accessible from the outside of the igniter.
  • the invention is in the following described with regard to a cylindrical igniter having a circular section.
  • the section of the housing modules and the modules to be inserted into these may be square, rectangular, star shaped, elliptic or any other form suited to the device to be ignited.
  • Fig 1 shows a conventional igniter comprising a cylindrical sleeve 8 containing two different explosives 6 and 7 and an insulating glass mass 10 filling up the rest of the sleeve. Between the explosive 6 and the mass 10 there is an initiating layer in contact with a wire or bridge 9 passing through the mass 10.
  • the igniter also comprises a cylindrical housing into which the sleeve is inserted.
  • the embodiment of an igniter system of the invention shown on Fig 2 comprises the same type of cylindrical housing 4 as the conventional igniter on Fig 1 .
  • the housing is closed at one end and open at the second end. It is however possible to have housing modules that are at least partly open also at the second end. Further it comprises three modules 1, 2 and 3 in the form of small tubes containing different kinds of explosives 5, 6, 7 and having the same outer diameter as the inner diameter of the housing module 4.
  • the tubes have different wall thicknesses and thus different inner diameters and the amount of explosive in each tube is therefore different.
  • the module or tube 1 also comprises an igniting module 11 built into the tube 1.
  • the embodiment of an assembled igniter of the invention shown on Fig 3 comprises three tubular modules T-4, T-5 and T-6, filled with different amounts and different kinds of explosives.
  • Module T-7 is a cap through which electrical wires are threaded.
  • Module T-3 is a bridge or thread and module T-2 is a part keeping modules T-4 to T-6 together.
  • Module T-8 is the cylindrical housing which has been closed or sealed such as by bending the upper part of the wall inwards to fasten the Module T-7 and hold it against the other modules.
  • the modules are held together within the housing module with the use of a filling material, such as a glue or a plastic, which fills out empty spaces between modules.
  • a filling material such as a glue or a plastic
  • the module T-7 having protruding electrical wires as connecting means is arranged at the second end, followed by the other modules.
  • the first open end is closed by for instance welding a plate to this end.
  • module 1 containing the primary explosive, and the starter module I 1 have been built together to a combined primary-starter module.
  • the invention is not limited to the types of igniters discussed above.
  • the modules may have any suitable shape and size.
  • the igniters may be intended for igniting or initiating different kinds of energetic devices, such as warheads or pyrotechnic devices.
  • the invention comprises all possible modifications within the scope of the claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Air Bags (AREA)
EP07108759A 2007-05-23 2007-05-23 Allumeur/initiateur Withdrawn EP1995551A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07108759A EP1995551A1 (fr) 2007-05-23 2007-05-23 Allumeur/initiateur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07108759A EP1995551A1 (fr) 2007-05-23 2007-05-23 Allumeur/initiateur

Publications (1)

Publication Number Publication Date
EP1995551A1 true EP1995551A1 (fr) 2008-11-26

Family

ID=38657682

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07108759A Withdrawn EP1995551A1 (fr) 2007-05-23 2007-05-23 Allumeur/initiateur

Country Status (1)

Country Link
EP (1) EP1995551A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2508838A1 (fr) 2011-04-04 2012-10-10 Nexter Munitions Inflammateur, composant pyrotechnique et procédé de fabrication d'un tel composant pyrotechnique
RU2466349C2 (ru) * 2010-12-20 2012-11-10 Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" (Госкорпорация "Росатом") Электродетонатор
WO2013059845A1 (fr) * 2011-10-17 2013-04-25 Ael Mining Services Limited Ensemble renforçateur d'amorçage
WO2014044830A1 (fr) * 2012-09-21 2014-03-27 Karsten Schwuchow Support d'allumeur, unité d'allumage et procédé de fabrication d'une unité d'allumage
RU2801996C1 (ru) * 2023-03-23 2023-08-22 Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" Устройство взрывное

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR714545A (fr) * 1930-03-29 1931-11-16 Anciens Ets Skoda Procédé pour l'aménagement et le montage de charges fractionnées de poudre dans l'étui d'un projectile
DE568830C (de) * 1931-04-02 1933-01-24 Otto Schmitt Verfahren zur Herstellung von Sprengkapseln
US2420201A (en) * 1942-03-07 1947-05-06 Olin Ind Inc Blasting cap
US4858529A (en) * 1988-07-01 1989-08-22 The United States Of America As Represented By The Department Of Energy Spark-safe low-voltage detonator
US20030005845A1 (en) * 2001-07-09 2003-01-09 Hagerty Patrick E. Variable increment modular artillery propellant

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR714545A (fr) * 1930-03-29 1931-11-16 Anciens Ets Skoda Procédé pour l'aménagement et le montage de charges fractionnées de poudre dans l'étui d'un projectile
DE568830C (de) * 1931-04-02 1933-01-24 Otto Schmitt Verfahren zur Herstellung von Sprengkapseln
US2420201A (en) * 1942-03-07 1947-05-06 Olin Ind Inc Blasting cap
US4858529A (en) * 1988-07-01 1989-08-22 The United States Of America As Represented By The Department Of Energy Spark-safe low-voltage detonator
US20030005845A1 (en) * 2001-07-09 2003-01-09 Hagerty Patrick E. Variable increment modular artillery propellant

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2466349C2 (ru) * 2010-12-20 2012-11-10 Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" (Госкорпорация "Росатом") Электродетонатор
EP2508838A1 (fr) 2011-04-04 2012-10-10 Nexter Munitions Inflammateur, composant pyrotechnique et procédé de fabrication d'un tel composant pyrotechnique
WO2013059845A1 (fr) * 2011-10-17 2013-04-25 Ael Mining Services Limited Ensemble renforçateur d'amorçage
US9250045B2 (en) 2011-10-17 2016-02-02 Ael Mining Services Limited Booster assembly
AP3936A (fr) * 2011-10-17 2016-12-16 Ael Mining Services Ltd
WO2014044830A1 (fr) * 2012-09-21 2014-03-27 Karsten Schwuchow Support d'allumeur, unité d'allumage et procédé de fabrication d'une unité d'allumage
US9879952B2 (en) 2012-09-21 2018-01-30 Karsten Schwuchow Igniter carrier, igniter unit and method for producing an igniter unit
RU2801996C1 (ru) * 2023-03-23 2023-08-22 Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" Устройство взрывное

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