EP0010487A1 - Treibladungsanzünder mit einem Glühdraht - Google Patents

Treibladungsanzünder mit einem Glühdraht Download PDF

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Publication number
EP0010487A1
EP0010487A1 EP79400737A EP79400737A EP0010487A1 EP 0010487 A1 EP0010487 A1 EP 0010487A1 EP 79400737 A EP79400737 A EP 79400737A EP 79400737 A EP79400737 A EP 79400737A EP 0010487 A1 EP0010487 A1 EP 0010487A1
Authority
EP
European Patent Office
Prior art keywords
pyrotechnic
coefficient
sensitivity
housing
composition
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
EP79400737A
Other languages
English (en)
French (fr)
Other versions
EP0010487B1 (de
Inventor
Christian Cannavo
André Espagnacq
Marie Riffault
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.)
Direction General de lArmement DGA
Gouvernement de la Republique Francaise
Original Assignee
Delegation Generale pour lArmement
Gouvernement de la Republique Francaise
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 Delegation Generale pour lArmement, Gouvernement de la Republique Francaise filed Critical Delegation Generale pour lArmement
Publication of EP0010487A1 publication Critical patent/EP0010487A1/de
Application granted granted Critical
Publication of EP0010487B1 publication Critical patent/EP0010487B1/de
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B45/00—Compositions or products which are defined by structure or arrangement of component of product
    • C06B45/04—Compositions or products which are defined by structure or arrangement of component of product comprising solid particles dispersed in solid solution or matrix not used for explosives where the matrix consists essentially of nitrated carbohydrates or a low molecular organic explosive
    • C06B45/06—Compositions or products which are defined by structure or arrangement of component of product comprising solid particles dispersed in solid solution or matrix not used for explosives where the matrix consists essentially of nitrated carbohydrates or a low molecular organic explosive the solid solution or matrix containing an organic component
    • C06B45/10—Compositions or products which are defined by structure or arrangement of component of product comprising solid particles dispersed in solid solution or matrix not used for explosives where the matrix consists essentially of nitrated carbohydrates or a low molecular organic explosive the solid solution or matrix containing an organic component the organic component containing a resin
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B33/00—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide
    • 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 devices for the electro-pyrotechnic ignition of propellant charges of artillery and missiles, or of fireworks such as, for example, illuminating, tracing, smoke, incendiary and gas generator devices.
  • Resistant wire systems are igniters in which a filament or pseudo-filament is disposed within a thermosensitive pyrotechnic substance.
  • a distinction is made between hot wire cells and exploded wire cells.
  • Conductive substance systems are igniters in which the current conducting element consists of the pyrotechnic substance itself; this substance can be conductive by adding various powders.
  • Hot-wire electro-pyrotechnic cells require the use of products sensitive to heating produced by the passage of a current through the filament.
  • the pyrotechnic charge contained in an electrical igniter of this type is usually ignited using a certain quantity of primary explosive placed around the initiator's initiating wire, either in the form of a compressed powder or in the form of a match head bead.
  • the disadvantages of these igniters are, on the one hand their sensitivity to shocks and friction which gives the components certain risks from the point of view of safety of use, and on the other hand lie in the dangers inherent in the handling of the primary explosive.
  • the cells with conductive substances are of simpler design, but their principle of operation is identical, namely that when the electrical energy expended makes it possible to reach the ignition temperature of the pyrotechnic product based on primary explosive, the igniter works by emitting a heat and gas flow.
  • Cells with conductive substances therefore offer the same drawbacks as hot-wire cells with, in addition, the fact that the operating energies are difficult to control, which also goes against safety.
  • the pyrotechnic substance In exploded wire cells, the pyrotechnic substance is put into operating mode by the explosion of the filament, a phenomenon which requires a significant supply of electrical energy, much greater than that necessary in the case of ignition of the wire cells. hot. Given the large amount of energy used in this initiation mode, it is possible to use insensitive pyrotechnic mixtures which are difficult to ignite under the action of weak sources of energy, but easily in the case of energies or sufficiently large electric currents. Such compositions are much less sensitive than those used in the previous systems. Consequently, the exploded wire cells are satisfactory from the point of view of safety, but the volume, mass and complexity constraints of the associated electrical source, make the initiation system unusable in many devices.
  • the invention aims to provide a device of the type envisaged to overcome the aforementioned disadvantages.
  • the invention relates to the production of an electro-pyrotechnic igniter operating with a limited electrical energy and not comprising pyrotechnic substances sensitive to external mechanical stresses, to thermal effects and to the electrostatic or electromagnetic environment.
  • the initiating pyrotechnic composition is composed by the association of a zirconium powder, a lead chromate powder and silicone resin, according to the respective weight percentages: 40 to 80%, 18 to 60% and 2 to 8 % and preferably 57%, 38% and 5% of RTV resin sold by the company RHONE-POULENC.
  • the pyrotechnic composition is formed by the combination of an aluminum powder, copper oxide powder and possibly a polymer nitrated according to the respective percentages by weight: 15 to 6 0% 40-85 % and O at 12% and preferably 40%, 60% and 0%.
  • the pyrotechnic cell is composed by the association of the initiating pyrotechnic composition and the inflammatory pyrotechnic composition according to the respective percentages: 5 to 15% and 85 to 95% and preferably 13% and 87%.
  • the ignition initiator is characterized in that the filament is disposed at the bottom of the housing cavity, its ends extending by insulated pins, passing through the housing, capable of being connected to a source of electricity.
  • the housing is made of an insulating material, the filament being disposed at the bottom of the housing cavity and being connected to a coil induced by an electromagnetic field integrated in the housing.
  • the housing consists of an inert, or pyrotechnically active, combustible material, for example based on nitrocellulose; the active boxes can undergo without detonating the initiation using a 30g hexogen tablet.
  • the initiator comprises a housing 1 comprising an open cavity 2 in which is disposed the pyrotechnic cell and the filament 3 heated during ignition.
  • the pins 4 isolated from each other, pass through the bottom of the housing, and are connected to the ends of the filament 3. These pins 4 are intended to be brought into contact with a source of electricity which is not shown.
  • the pyrotechnic cell is constituted by an initiating pyrotechnic composition 5 and by an inflammatory pyrotechnic composition 6.
  • a layer of a few tenths of a millimeter, or approximately 25 to 35 mg, of initiating composition 5 composed by the association of zirconium powder, of powder of lead chromate and silicone resin RTV 20521 playing the role of binder and phlegmatizer is placed in a pasty state on the filament.
  • the respective percentages by mass of zirconium powder, lead chromate powder and RIV 20521 resin are: 57%, 38% and 5%.
  • the ignition temperature of this composition is of the order of 320 ° C. On the other hand, it has a coefficient of sensitivity to impact (CSI) of 32% starting with 112 joules.
  • This CSI measurement was determined by the FMD 410 E1 method of the STPE manual of procedures; the measurement is carried out according to the fall of a determined mass falling from a variable height onto a sample, taken in small quantity in a specially shaped capsule.
  • the coefficient of friction sensitivity (CSF) of this composition is 118 N, a measurement determined like the following, by the FMD 420 A method of the previous manual which implements the JULIUS PETERS (BAM) device.
  • BAM JULIUS PETERS
  • the last measurement was carried out by placing the pyrotechnic substance between two electrodes connected to a battery of capacitors.
  • the upper electrode is spherical in shape with a diameter of 10mm, the lower electrode being cylindrical and with a diameter of 2mm.
  • a bucket insulator has a conical sectional housing in which the pyrotechnic substance to be tested is arranged, without settling.
  • the angle at the top of the truncated cone is 90 °, the diameter of the largest section is 5.5mm and the lower electrode is flush with the smallest section of diameter 2mm.
  • This thin layer of pyrotechnic composition playing the role of a match, is overloaded, when dry, with a layer of inflammatory pyrotechnic composition composed by the combination of aluminum powder and copper oxide powder, according to the respective percentages by mass of 40% and 60%.
  • This mixture has an ignition temperature of the order of 550 ° C, a C.S.I. 112 joules, a C.S.F. of 335 N, a coefficient of sensitivity to static electricity of around 50 millijoules (1000 ⁇ F capacitor charged at 10 kV).
  • inflammatory pyrotechnic composition approximately 200 mg was used, compressed to 300 bars, which gives the initiator an inflammatory power larger than sufficient to effectively ignite black powder type PN L 1, placed a few millimeters in a sachet. in ventilated fabric.
  • the opening of the cavity 2 of the housing is closed by a disk 7 of strong paper, glued and varnished, so as to isolate the pyrotechnic cell from the outside environment.
  • FIG. 2 Another embodiment (fig. 2) is an initiator, the firing order of which is carried out by induction of a high-frequency high-power signal, which offers the advantage, compared with conventional electric initiators, not to require any direct connection to the filament circuit: this feature makes it possible to keep intact the intrinsic characteristics of the initiator from the point of view of electrical safety since the direct addition of conductors can, by causing an antenna effect, capture electrostatic or electromagnetic energies and make the system aware of these risks.
  • This particular embodiment is composed of a housing 8 made of inert or active insulating material.
  • This housing includes a cavity 9 in which is disposed a disc 10 (fig. 2 and 3) on which is maintained an induced turn 11 whose ends 12 extend as far as the center of the disc, and on which a filament is welded 13.
  • This disc 10 is held at the bottom of the cavity 9 of the housing 8 by a cover 14 made of the same material as the housing 8.
  • This cover 14 is boxed on the lateral surface of the cavity 9 and can, for example, be secured to it by gluing.
  • this cover has a hole 15 opening onto the filament 13.
  • This hole 15, in the same way as in the embodiment described above, is filled by the pyrotechnic cell, and is closed by a strong paper disc 16 .

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Dispersion Chemistry (AREA)
  • Molecular Biology (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Resistance Heating (AREA)
EP79400737A 1978-10-13 1979-10-12 Treibladungsanzünder mit einem Glühdraht Expired EP0010487B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7829210 1978-10-13
FR7829210A FR2438821A1 (fr) 1978-10-13 1978-10-13 Dispositif d'allumage a fil chaud de securite

Publications (2)

Publication Number Publication Date
EP0010487A1 true EP0010487A1 (de) 1980-04-30
EP0010487B1 EP0010487B1 (de) 1982-06-23

Family

ID=9213690

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79400737A Expired EP0010487B1 (de) 1978-10-13 1979-10-12 Treibladungsanzünder mit einem Glühdraht

Country Status (7)

Country Link
US (1) US4354432A (de)
EP (1) EP0010487B1 (de)
BE (1) BE879385A (de)
CH (1) CH634143A5 (de)
DE (1) DE2963180D1 (de)
FR (1) FR2438821A1 (de)
IT (1) IT1123852B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2599361A1 (fr) * 1986-05-27 1987-12-04 Survilliers Nle Cartoucherie Composition pyrotechnique pour inflammateur et allumeur electrique de securite, inflammateur et allumeur ainsi obtenus
US5179249A (en) * 1991-04-05 1993-01-12 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Performance of blasting caps
US5849883A (en) * 1988-05-13 1998-12-15 Amgen Inc. Method for purifying granulocyte colony stimulating factor
EP1386899A4 (de) * 2001-05-10 2008-10-29 Nippon Kayaku Kk Zündmittelzusammensetzung und zünder, bei dem die zündmittelzusammensetzung verwendet wird

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4698532A (en) * 1982-07-19 1987-10-06 Westinghouse Electric Corp. Electromagnetic projectile launcher with explosive-start and plasma drive
US4989515A (en) * 1989-08-08 1991-02-05 The United States Of America As Represented By The United States Department Of Energy Ignitor with stable low-energy thermite igniting system
FR2669725B1 (fr) * 1990-11-27 1994-10-07 Thomson Brandt Armements Detonateur pyrotechnique a connexions coaxiales.
US20060086277A1 (en) * 1998-03-30 2006-04-27 George Bossarte Precision pyrotechnic display system and method having increased safety and timing accuracy
AU5202099A (en) * 1998-03-30 1999-11-08 Magicfire, Inc. Precision pyrotechnic display system and method having increased safety and timing accuracy
RU2150671C1 (ru) * 1998-11-04 2000-06-10 Анатолий Геннадьевич Белявский Электродетонатор
FR2788165B1 (fr) * 1998-12-30 2001-02-02 Pyroalliance Contacteur electrique a fonctionnement pyrotechnique
RU2200928C2 (ru) * 1999-03-29 2003-03-20 Российский федеральный ядерный центр Всероссийский научно-исследовательский институт технической физики им. акад. Е.И.Забабахина Детонатор без первичных взрывчатых веществ
US6821295B1 (en) 2000-06-26 2004-11-23 Thoratec Corporation Flared coronary artery bypass grafts
EP1625334B9 (de) 2003-05-21 2012-07-25 Alexza Pharmaceuticals, Inc. Schlag gezündete unabhängige heizeinheit
WO2005118510A1 (en) * 2004-05-20 2005-12-15 Alexza Pharmaceuticals, Inc. Stable initiator compositions and igniters
US7402777B2 (en) 2004-05-20 2008-07-22 Alexza Pharmaceuticals, Inc. Stable initiator compositions and igniters
WO2006022714A1 (en) 2004-08-12 2006-03-02 Alexza Pharmaceuticals, Inc. Aerosol drug delivery device incorporating percussively activated heat packages
US8079307B2 (en) * 2005-10-05 2011-12-20 Mckinley Paul Electric match assembly with isolated lift and burst function for a pyrotechnic device
RU2301961C1 (ru) * 2005-10-10 2007-06-27 Российская Федерация, от имени которой выступает Государственный заказчик - Федеральное агентство по атомной энергии Электродетонатор на основе бризантного взрывчатого вещества
US7823508B2 (en) * 2006-08-24 2010-11-02 Orica Explosives Technology Pty Ltd Connector for detonator, corresponding booster assembly, and method of use
RU2343400C2 (ru) * 2007-01-29 2009-01-10 Федеральное государственное унитарное предприятие "Российский Федеральный ядерный центр-Всероссийский научно-исследовательский институт экспериментальной физики"-ФГУП "РФЯЦ-ВНИИЭФ" Электродетонатор
US7834295B2 (en) 2008-09-16 2010-11-16 Alexza Pharmaceuticals, Inc. Printable igniters
RU2389971C1 (ru) * 2009-03-16 2010-05-20 Федеральное государственное унитарное предприятие "Российский федеральный ядерный центр - Всероссийский научно-исследовательский институт технической физики имени академика Е.И. Забабахина" (ФГУП "РФЯЦ - ВНИИТФ им. академ. Е.И. Забабахина") Электродетонатор
US8477049B2 (en) * 2009-06-05 2013-07-02 Apple Inc. Efficiently embedding information onto a keyboard membrane
US20120048963A1 (en) 2010-08-26 2012-03-01 Alexza Pharmaceuticals, Inc. Heat Units Using a Solid Fuel Capable of Undergoing an Exothermic Metal Oxidation-Reduction Reaction Propagated without an Igniter
PL3268072T3 (pl) 2015-03-11 2024-07-01 Alexza Pharmaceuticals, Inc. Zastosowanie materiałów antystatycznych w drogach przepływu powietrza w procesie termicznej kondensacji aerozolu
RU2634949C1 (ru) * 2016-10-10 2017-11-08 Виталий Борисович Шепеленко Электродетонатор безопасного обращения
RU2634947C1 (ru) * 2016-10-10 2017-11-08 Владимир Викторович Черниченко Электродетонатор
RU2636831C1 (ru) * 2016-10-10 2017-11-28 Виталий Борисович Шепеленко Электродетонатор с электромеханической блокировкой
RU2634951C1 (ru) * 2016-10-10 2017-11-08 Владимир Викторович Черниченко Устройство инициирования
RU2634941C1 (ru) * 2016-10-10 2017-11-08 Виталий Борисович Шепеленко Контактный датчик цели
DE102017118416A1 (de) * 2017-08-11 2019-02-14 Ruag Ammotec Gmbh Pyrotechnische Trenneinrichtung, System zum elektrischen Laden einer elektrischen Energiezelle, Mobilgerät und Ladegerät
RU2706151C1 (ru) * 2018-10-25 2019-11-14 Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" (Госкорпорация "Росатом") Низковольтный электродетонатор
RU2745086C1 (ru) * 2020-05-12 2021-03-19 Российская Федерация, от имени которой выступает Министерство обороны Российской Федерации Инициатор модульного метательного заряда
RU2763206C1 (ru) * 2020-12-28 2021-12-28 Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" (Госкорпорация "Росатом") Электродетонатор

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB768616A (en) * 1954-06-10 1957-02-20 Canadian Ind 1954 Ltd Improvements in electric blasting initiators
US2989389A (en) * 1956-04-27 1961-06-20 Dynamit Nobel Ag Primer charge for detonators
US3090310A (en) * 1960-05-04 1963-05-21 George W Peet Conductive explosive primer mixture and device
FR1359245A (fr) * 1963-03-12 1964-04-24 Banyagyutacsgyar Capsule de mise à feu à action retardée pour détonateurs
US3185093A (en) * 1962-02-08 1965-05-25 Bjorksten Res Lab For Industry High frequency immune squib
US3455244A (en) * 1967-09-22 1969-07-15 Dynamit Nobel Ag Shockproof primer cover
FR1599961A (de) * 1968-01-13 1970-07-20
US3611939A (en) * 1962-11-29 1971-10-12 Hans Stadler Primer
FR2174406A5 (en) * 1972-03-03 1973-10-12 France Etat Explosion initiator of the percussion type - for automatic weapons
US3809964A (en) * 1971-11-12 1974-05-07 Ministre Charge De La Defense Electrically actuated priming device
DE2421908A1 (de) * 1973-05-14 1974-12-12 Ml Aviation Co Ltd Sprengvorrichtung
FR2307248A1 (fr) * 1973-07-12 1976-11-05 Poudres & Explosifs Ste Nale Dispositif allumeur directif
FR2353040A1 (fr) * 1976-05-25 1977-12-23 Europ Propulsion Allumeur pour bloc de poudres propulsives

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CA762710A (en) * 1967-07-11 E.I. Du Pont De Nemours And Company Explosive initiator
US3227083A (en) * 1964-01-30 1966-01-04 Holex Inc Electroexplosive cartridge with heat sink button
US3264989A (en) * 1964-03-06 1966-08-09 Du Pont Ignition assembly resistant to actuation by radio frequency and electrostatic energies
US3570403A (en) * 1968-11-06 1971-03-16 Ensign Bickford Co Pyrotechnic igniter
US3640222A (en) * 1968-12-27 1972-02-08 Hercules Inc Booster-cap assembly
US3882323A (en) * 1973-12-17 1975-05-06 Us Navy Method and apparatus for protecting sensitive information contained in thin-film microelectonic circuitry
DE2506055A1 (de) * 1975-02-13 1976-08-26 Dynamit Nobel Ag Elektrisches anzuendelement
SE416843B (sv) * 1977-04-19 1981-02-09 Bofors Ab Eltenddon med elektrisk fordrojningskrets
US4190413A (en) * 1977-12-30 1980-02-26 Gte Sylvania Incorporated Photoflash lamp

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB768616A (en) * 1954-06-10 1957-02-20 Canadian Ind 1954 Ltd Improvements in electric blasting initiators
US2989389A (en) * 1956-04-27 1961-06-20 Dynamit Nobel Ag Primer charge for detonators
US3090310A (en) * 1960-05-04 1963-05-21 George W Peet Conductive explosive primer mixture and device
US3185093A (en) * 1962-02-08 1965-05-25 Bjorksten Res Lab For Industry High frequency immune squib
US3611939A (en) * 1962-11-29 1971-10-12 Hans Stadler Primer
FR1359245A (fr) * 1963-03-12 1964-04-24 Banyagyutacsgyar Capsule de mise à feu à action retardée pour détonateurs
US3455244A (en) * 1967-09-22 1969-07-15 Dynamit Nobel Ag Shockproof primer cover
FR1599961A (de) * 1968-01-13 1970-07-20
US3809964A (en) * 1971-11-12 1974-05-07 Ministre Charge De La Defense Electrically actuated priming device
FR2174406A5 (en) * 1972-03-03 1973-10-12 France Etat Explosion initiator of the percussion type - for automatic weapons
DE2421908A1 (de) * 1973-05-14 1974-12-12 Ml Aviation Co Ltd Sprengvorrichtung
FR2307248A1 (fr) * 1973-07-12 1976-11-05 Poudres & Explosifs Ste Nale Dispositif allumeur directif
FR2353040A1 (fr) * 1976-05-25 1977-12-23 Europ Propulsion Allumeur pour bloc de poudres propulsives

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2599361A1 (fr) * 1986-05-27 1987-12-04 Survilliers Nle Cartoucherie Composition pyrotechnique pour inflammateur et allumeur electrique de securite, inflammateur et allumeur ainsi obtenus
US5849883A (en) * 1988-05-13 1998-12-15 Amgen Inc. Method for purifying granulocyte colony stimulating factor
US5179249A (en) * 1991-04-05 1993-01-12 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Performance of blasting caps
EP1386899A4 (de) * 2001-05-10 2008-10-29 Nippon Kayaku Kk Zündmittelzusammensetzung und zünder, bei dem die zündmittelzusammensetzung verwendet wird

Also Published As

Publication number Publication date
FR2438821B1 (de) 1981-03-27
FR2438821A1 (fr) 1980-05-09
IT7926509A0 (it) 1979-10-15
BE879385A (fr) 1980-02-01
CH634143A5 (fr) 1983-01-14
IT1123852B (it) 1986-04-30
US4354432A (en) 1982-10-19
EP0010487B1 (de) 1982-06-23
DE2963180D1 (en) 1982-08-12

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