US3134329A - Exploding bridgewire coating - Google Patents
Exploding bridgewire coating Download PDFInfo
- Publication number
- US3134329A US3134329A US193729A US19372962A US3134329A US 3134329 A US3134329 A US 3134329A US 193729 A US193729 A US 193729A US 19372962 A US19372962 A US 19372962A US 3134329 A US3134329 A US 3134329A
- Authority
- US
- United States
- Prior art keywords
- bridgewire
- coating
- silicate
- water
- squib
- 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.)
- Expired - Lifetime
Links
Images
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
- F42B3/103—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
-
- 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
- F42B3/125—Bridge initiators characterised by the configuration of the bridge initiator case
Definitions
- This invention relates to electrically actuated deflagrating squibs, and more particularly to electrically actuated deflagrating squibs of the exploding bridgewire type. Deflagrating squibs of the exploding bridgewire type have found increasing use, particularly as a means of initiating the ignition of solid-propellant rocket charges,
- the bridgewire may be heated to incandescence or to its fusion point, accidentally actuating the squib. Again, the bridgewire -may be'subjected to prolonged electrical heating and, although not heated to incandescence, may raise the temperature of the pyrotechnic charge to the point at which it. will undergo, auto-ignition.
- Structural and/ or chemical alterations may be made to overcome such problems, but the more resistant to accidental actuation an EBW squib is made, the more resistant to intentional actuation 'it may become.
- the delay time, or time to full ignition of the pyrotechnic charge following actuation may be seriously affected. In extreme instances, a squib may be made so safe that actuation is unpredictable or problematical.
- Such a squib comprises a body 1, usually of metal, with a pair of electrodes 2 for contact with a mating connector (not shown) and electrically insulated from each other and from the squib body 1 by insulator 3, composed of glass,
- the diaphragm 7 may be coated on the side opposite the bridgewire 5 with a very fast-burning pyrotechnic composition 10, composed of any such as are knownin the art.
- a main pyrotechnic charge 11 which may be any of those common in the art or composed as described in copending application Serial Number 60,134, filed October 3, 1960, is placed above the diaphragm'7.
- a cl0- sure 12 commonly of metal foil, retains and seals the main charge 11.
- compositions of the present invention which are applied as a coating '6 to the bridgewire 5, are composed of finely divided particles, 44 microns or smaller in size, of a secondary explosive, suchjas pentaerythritol tetranitrate (PETN), bound with a water soluble inorganic 'alkali silicate, such as sodium silicate.
- a secondary explosive suchjas pentaerythritol tetranitrate (PETN)
- PTN pentaerythritol tetranitrate
- a water soluble inorganic 'alkali silicate such as sodium silicate.
- the silicate com- A preferred composition which has been found suitable for. use in EBW squibs suchas that shown in the drawing is prepared by mixing 30 parts by weight of purified PETN, finer than 325 mesh, With 70 parts by weight of a solution of sodium silicate in water.
- the silicate solution for this example has a hydrometer value of 40' degrees B-
- the ratio of silicate binder to secondary explosive may be adjusted in a manner that gives optimum balance between the mechanical properties needed for adhesion and strength, and the chemical properties needed for rapid reaction.
- compositions ranging from 40 to 70% secondary explosive bound with 30 to 60% silicate binder, on a dry weight basis may-be employed.
- a number of secondary explosives other than PETN have been found suitable for use in the compositions of the present invention.
- Such materials as, for example, cyclotrimethylenetrinitramine (RDX) may be employed.
- a preferred silicate binder is composed of sodium silicate (water glass) which has a formula designation of Na O-(SiO where x is approximately 3. Alternate names and formulae for the primary ingredient of the binder are sodium tetrasilicate, Na Si O or water soluble silicates, such as sodium metalsilicate, Na SiO or potassium disilicate, K Si O I
- the coating compositions of the present invention per-' 7 form several functions. They act as both electrical and thermal insulators, as heat sinks, and as radiators to prevent localized overheating due to accidental passage of electrical energy through the bridgewire. In addition, when the bridgewire is exploded upon deliberate actuation, the coating contributes to the explosive energy released, rupturing the diaphragm and igniting the pyrotechnic charges.
- Uncoated bridgewires when used in a squib such as is shown in the drawing, frequently 'do not release sufficient energy to rupture the diaphragm and ignite the pyrotechnic charges. If the thickness of the diaphragm is reduced, or if the diaphragm is spaced in closer proximity to the bridgewire, the squib may he accidentally actuated by passage of suflicient electrical energy through the bridgewire to heat it to incandescence or to fuse it. Accidental actuation is even more likely in squibs in which a diaphragm is not used. Exploding bridgewire squibs, employing bridgewires coated with compositions it should not be limited thereto, for obvious modifications will occur to those skilled in the art without departing from the spirit of the invention or the scope of the subjoined claims.
- silicate binder consists of at least one silicate selected from the class consisting of water-soluble sodium silicate compounds.
- silicate binder consists of a mixture of silicates selected from the class consisting of water-soluble sodium silicate compounds.
- silicate binder consists of at least one silicate selected from the class consisting of water-soluble potassium silicate compounds.
- silicate binder consists of a mixture of silicates selected from the class consisting of water-soluble potassium silicate compounds.
- silicate binder consists of a mixture of silicates selected from the class consisting of water-soluble sodium and potassiumsilicate compounds.
- A'coating for an exploding bridgewire in a defilagrating squib said coating consisting of a finely divided secondary explosive in awater-soluble inorganic silicate binder.
- silicate binder consists of at least one silicate selected from the .class consisting of'water-soluble sodium silicate compounds.
- silicate binder consists of a mixture of silicates selected from the class consisting of water-soluble sodium silicate compounds.
- silicate binder consists of at least one silicate selected from the class consisting of Water-soluble potassium silicate compounds.
- silicate binder consists of a mixture of silicates selected from the class consisting of water-soluble potassium silicate compounds.
- silicate binder consists of a mixture of silicates selected from the class consisting of water-soluble sodium and potassium silicate compounds.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Air Bags (AREA)
- Paints Or Removers (AREA)
Description
May 26, 1964 s. ZEMAN 3,134,329
. EXPLODING BRIDGEWIRE COATING Filed May 10, 1962 SAMUEL ZEMAN INVENTOR.
BY WW ATTORNEY 3,134,329 r EXPLODING BRIDGEWIRE COATING ,Samuel Zeman, Huntsville, Ala, assignor to: Thiokol Chemical Corporation, Bristol, Pa., a corporation of Delaware Filed May 10, 1962, Ser. No. 193,729 18 Claims. (Cl. 102-28) This invention relates to electrically actuated deflagrating squibs, and more particularly to electrically actuated deflagrating squibs of the exploding bridgewire type. Deflagrating squibs of the exploding bridgewire type have found increasing use, particularly as a means of initiating the ignition of solid-propellant rocket charges,
because of their resistance to accidental actuation. Very high values of electrical energy (2 0,000,000 ergs) must be applied to the bridgewire in a very short time (less than 4 microseconds) to cause it to develop the characteristic high temperature and high pressure shock wave phenomenon known as bridgewire explosion. The energy of this explosion is transmitted to a pyrotechnic charge, causing it to ignite; Accidental subjection of the bridgewire to less intense or less concentrated electrical energy will not ordinarily explodefthe bridgewire F and actuate the squib. Further, the pyrotechnic compositions used are such that they will not, normally, ignite when the bridgewire is heated by relatively low intensity electrical current, accidentally applied directly 'or induced by extraneous sources of electrical energy. 1, Although recent prior art exploding bridgewire (EBW) fsquibs are more resistant to accidental actuation than prior art ignition devices, there are a number of circumstances under which theymay he accidentally actuated.
If subjected to electrical energies slightly below those required to -explode the bridgewire, the bridgewire may be heated to incandescence or to its fusion point, accidentally actuating the squib. Again, the bridgewire -may be'subjected to prolonged electrical heating and, although not heated to incandescence, may raise the temperature of the pyrotechnic charge to the point at which it. will undergo, auto-ignition.
Structural and/ or chemical alterations may be made to overcome such problems, but the more resistant to accidental actuation an EBW squib is made, the more resistant to intentional actuation 'it may become. In addition, the delay time, or time to full ignition of the pyrotechnic charge following actuation, may be seriously affected. In extreme instances, a squib may be made so safe that actuation is unpredictable or problematical.
In spite of such problems, however, service requirements constantly call for EBW squibs with increased resistance to accidental actuation without increased delay time.
It is, therefore, an object of the present invention to provide an improved EBW squib which has greater resistance to accidental actuation. It is a further object of of the invention is advantageously employed. Such a squib comprises a body 1, usually of metal, with a pair of electrodes 2 for contact with a mating connector (not shown) and electrically insulated from each other and from the squib body 1 by insulator 3, composed of glass,
United States Patent Ofilice [oration of the Water, is PETN and 50% sodium plastic, or similar electrically insulating material. An additional electrical insulator 4 may also be employed. The pair of electrodes 2 isbridged within the squib by a bridgewire 5, usually of noble metal or noble metal alloy. A coating 6, employing a composition of the present invention, is applied to the bridgewire 5, completely covering it. 1
A thin, rupturable diaphragm 7 of, for example, 1 to 2 mil thick lead foil, is held in spaced relation to the bridgewire 5 by an electrically insulating spacer 8 and a retaining spacer 9, which may be of metal. The diaphragm 7 may be coated on the side opposite the bridgewire 5 with a very fast-burning pyrotechnic composition 10, composed of any such as are knownin the art. A main pyrotechnic charge 11, which may be any of those common in the art or composed as described in copending application Serial Number 60,134,, filed October 3, 1960, is placed above the diaphragm'7. A cl0- sure 12, commonly of metal foil, retains and seals the main charge 11.
The compositions of the present invention, which are applied as a coating '6 to the bridgewire 5, are composed of finely divided particles, 44 microns or smaller in size, of a secondary explosive, suchjas pentaerythritol tetranitrate (PETN), bound with a water soluble inorganic 'alkali silicate, such as sodium silicate. The silicate com- A preferred composition which has been found suitable for. use in EBW squibs suchas that shown in the drawing is prepared by mixing 30 parts by weight of purified PETN, finer than 325 mesh, With 70 parts by weight of a solution of sodium silicate in water. The silicate solution for this example has a hydrometer value of 40' degrees B-aum, a density of 1.38 grams per cubic centimeter, and a ratio of Na O to SiO of 1:3.25. The
- mixture is coated onto the bridgewire 5 and the insulator 3 to the desired thickness, and the partially assembled squib is then heated in an oven to drive oif the water. The final composition ;on a dry weight basis, after evapsilicate. V
In practice, the ratio of silicate binder to secondary explosive may be adjusted in a manner that gives optimum balance between the mechanical properties needed for adhesion and strength, and the chemical properties needed for rapid reaction. Depending upon the effect desired and the electrical energy provided for actuation, compositions ranging from 40 to 70% secondary explosive bound with 30 to 60% silicate binder, on a dry weight basis, may-be employed.
A number of secondary explosives other than PETN have been found suitable for use in the compositions of the present invention. Such materials as, for example, cyclotrimethylenetrinitramine (RDX) may be employed.
A preferred silicate binder is composed of sodium silicate (water glass) which has a formula designation of Na O-(SiO where x is approximately 3. Alternate names and formulae for the primary ingredient of the binder are sodium tetrasilicate, Na Si O or water soluble silicates, such as sodium metalsilicate, Na SiO or potassium disilicate, K Si O I The coating compositions of the present invention per-' 7 form several functions. They act as both electrical and thermal insulators, as heat sinks, and as radiators to prevent localized overheating due to accidental passage of electrical energy through the bridgewire. In addition, when the bridgewire is exploded upon deliberate actuation, the coating contributes to the explosive energy released, rupturing the diaphragm and igniting the pyrotechnic charges.
Uncoated bridgewires, when used in a squib such as is shown in the drawing, frequently 'do not release sufficient energy to rupture the diaphragm and ignite the pyrotechnic charges. If the thickness of the diaphragm is reduced, or if the diaphragm is spaced in closer proximity to the bridgewire, the squib may he accidentally actuated by passage of suflicient electrical energy through the bridgewire to heat it to incandescence or to fuse it. Accidental actuation is even more likely in squibs in which a diaphragm is not used. Exploding bridgewire squibs, employing bridgewires coated with compositions it should not be limited thereto, for obvious modifications will occur to those skilled in the art without departing from the spirit of the invention or the scope of the subjoined claims.
What is claimed is:
1. In a deflagrating squib of the exploding bridgewire type, the combination with a bridgewire of a limitedly detonating coating applied to said bridgewire, said coating consisting of a finely divided secondary explosive in .a Water-soluble inorganic silicate binder.
2. The combination, as in claim 1, wherein said secondary explosive consists of particles that are 44 microns or smaller in size.
3. The combination, as in claim 1, wherein said secondary explosive is pentaerythritol tetranitrate.
4. The combination, as in claim 1, wherein said secondary explosive is cyclotrimethylenetrinitramine.
5. The combination, as in claim 1, wherein said silicate binder consists of at least one silicate selected from the class consisting of water-soluble sodium silicate compounds.
6. The combination, as in claim 1, wherein said silicate binder consists of a mixture of silicates selected from the class consisting of water-soluble sodium silicate compounds.
7. The combination, as in claim 1, wherein said silicate binder consists of at least one silicate selected from the class consisting of water-soluble potassium silicate compounds.
8. The combination, as in claim 1, wherein said silicate binder consists of a mixture of silicates selected from the class consisting of water-soluble potassium silicate compounds.
9. The combination, as in claim 1, wherein said silicate binder consists of a mixture of silicates selected from the class consisting of water-soluble sodium and potassiumsilicate compounds.
. 1 0. A'coating for an exploding bridgewire in a defilagrating squib, said coating consisting of a finely divided secondary explosive in awater-soluble inorganic silicate binder.
11. A coating, as in claim 10, wherein said secondary explosive consists of particles that are 44 microns or smaller in size.
12. A coating, as in claim 10, wherein said secondary explosive is pentaerythritol tetranitrate.
13. A coating, as in claim 10, wherein said secondary explosive is cyclotrimethylenetrinitramine.
14. A coating, as in claim 10, wherein said silicate binder consists of at least one silicate selected from the .class consisting of'water-soluble sodium silicate compounds.
15. A coating, as in claim 10, wherein said silicate binder consists of a mixture of silicates selected from the class consisting of water-soluble sodium silicate compounds.
16. A coating, as in claim 10, wherein said silicate binder consists of at least one silicate selected from the class consisting of Water-soluble potassium silicate compounds.
17. A coating, as in claim 10, wherein said silicate binder consists of a mixture of silicates selected from the class consisting of water-soluble potassium silicate compounds.
18. A coating, as in claim 10, wherein said silicate binder consists of a mixture of silicates selected from the class consisting of water-soluble sodium and potassium silicate compounds.
References Cited in the file of this patent UNITED STATES PATENTS 2,926,566 Atkins et al. Mar. 1, 1960 2,982,639 Gey May 2, 1961 2,992,087 I Fassnacht July 11, 1961 3,040,660 Johnston June 26, 1962 3,048,507 Zebree Aug. 7, 1962 3,054,258 Marti Sept. 18, 1962 3,059,576 Haefner Oct. 23, 1962
Claims (1)
10. A COATING FOR AN EXPLODING BRIDGEWIRE IN A DEFLAGRATING SQUIB, SAID COATING CONSISTING OF A FINELY DIVIDED SECONDARY EXPLOSIVE IN A WATER-SOUBLE INORGANIC SILICATE BINDER.
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE632157D BE632157A (en) | 1962-05-10 | ||
NL133269D NL133269C (en) | 1962-05-10 | ||
NL292575D NL292575A (en) | 1962-05-10 | ||
US193729A US3134329A (en) | 1962-05-10 | 1962-05-10 | Exploding bridgewire coating |
GB18174/62A GB972664A (en) | 1962-05-10 | 1963-05-08 | Deflagrating squib |
FR934275A FR1364664A (en) | 1962-05-10 | 1963-05-09 | Explosive detonator |
DET23979A DE1235205B (en) | 1962-05-10 | 1963-05-10 | Electric bridge igniter |
CH590663A CH439051A (en) | 1962-05-10 | 1963-05-10 | Igniting charge |
SE5219/63A SE321431B (en) | 1962-05-10 | 1963-05-10 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US193729A US3134329A (en) | 1962-05-10 | 1962-05-10 | Exploding bridgewire coating |
Publications (1)
Publication Number | Publication Date |
---|---|
US3134329A true US3134329A (en) | 1964-05-26 |
Family
ID=22714790
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US193729A Expired - Lifetime US3134329A (en) | 1962-05-10 | 1962-05-10 | Exploding bridgewire coating |
Country Status (7)
Country | Link |
---|---|
US (1) | US3134329A (en) |
BE (1) | BE632157A (en) |
CH (1) | CH439051A (en) |
DE (1) | DE1235205B (en) |
GB (1) | GB972664A (en) |
NL (2) | NL292575A (en) |
SE (1) | SE321431B (en) |
Cited By (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3272127A (en) * | 1963-08-05 | 1966-09-13 | Robert E Betts | Igniter squib |
DE1258771B (en) * | 1965-03-09 | 1968-01-11 | Montage Technik Anstalt F | Process for firing propellant charges for powder-powered bolt setting tools and propellant charge for this |
US3791298A (en) * | 1971-01-18 | 1974-02-12 | France Etat | Electrical switching device employing a vaporizable conductive element |
US3831523A (en) * | 1967-01-04 | 1974-08-27 | Us Army | Electroexplosive device |
FR2307248A1 (en) * | 1973-07-12 | 1976-11-05 | Poudres & Explosifs Ste Nale | Igniter assembly for propellant or other charges - with directional divergent beam of incandescent particles and casing constructed to resist premature disintegration |
US4686903A (en) * | 1984-05-21 | 1987-08-18 | Ems-Inventia AG | Method of manufacturing a pole body for an electric fuse, pole body for an electric fuse and method of using the pole body |
US4715280A (en) * | 1984-05-24 | 1987-12-29 | Ems-Inventa Ag | Pole body for an electric fuze, method of manufacturing and method of using the pole body |
DE3735405A1 (en) * | 1987-10-20 | 1989-05-11 | Dynamit Nobel Ag | IGNITION PILL |
US4831932A (en) * | 1987-08-17 | 1989-05-23 | Honeywell Inc. | Detonator |
US4938137A (en) * | 1989-06-05 | 1990-07-03 | Guay Roland H | Exploding bridgewire driven multiple flyer detonator |
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 |
US5140906A (en) * | 1991-11-05 | 1992-08-25 | Ici Americas, Inc. | Airbag igniter having double glass seal |
US5404263A (en) * | 1992-08-27 | 1995-04-04 | Oea, Inc. | All-glass header assembly used in an inflator system |
US5691499A (en) * | 1996-08-07 | 1997-11-25 | Morton International, Inc. | Bridgewire ladder initiator |
US5709724A (en) * | 1994-08-04 | 1998-01-20 | Coors Ceramics Company | Process for fabricating a hermetic glass-to-metal seal |
US5939660A (en) * | 1997-03-12 | 1999-08-17 | Trw Inc. | Inflator for an inflatable vehicle occupant protection device |
US5988069A (en) * | 1996-11-12 | 1999-11-23 | Universal Propulsion Company, Inc. | Electric initiator having a sealing material forming a ceramic to metal seal |
FR2781878A1 (en) * | 1998-07-31 | 2000-02-04 | Giat Ind Sa | PROCESS FOR IMPLEMENTING A PYROTECHNIC SUBSTANCE AND PYROTECHNIC INITIATOR OBTAINED WITH SUCH A METHOD |
US6230624B1 (en) | 1999-08-13 | 2001-05-15 | Trw Inc. | Igniter having a hot melt ignition droplet |
US6274252B1 (en) * | 1994-08-04 | 2001-08-14 | Coors Ceramics Company | Hermetic glass-to-metal seal useful in headers for airbags |
US6422145B1 (en) | 1997-11-06 | 2002-07-23 | Rocktek Ltd. | Controlled electromagnetic induction detonation system for initiation of a detonatable material |
EP1377791A1 (en) * | 2001-03-31 | 2004-01-07 | Robert Bosch Gmbh | Bridge igniter |
US20040007911A1 (en) * | 2002-02-20 | 2004-01-15 | Smith David Carnegie | Apparatus and method for fracturing a hard material |
US6679175B2 (en) | 2001-07-19 | 2004-01-20 | Rocktek Limited | Cartridge and method for small charge breaking |
US6708619B2 (en) | 2000-02-29 | 2004-03-23 | Rocktek Limited | Cartridge shell and cartridge for blast holes and method of use |
EP1455160A1 (en) * | 2003-03-03 | 2004-09-08 | Schott Glas | Metal-fixing-material-passage and method of manufacturing a header with a metal-fixing-material-passage |
EP1457758A1 (en) * | 2003-03-08 | 2004-09-15 | Dynamit Nobel AIS GmbH Automotive Ignition Systems | Glass-passage for pyrotechnical initiator |
EP1813906A1 (en) | 2006-01-27 | 2007-08-01 | Schott AG | Glass-to-fixing-material bushing and use thereof as well as airbag and seat-belt tensioner with an initiatot |
EP1808667A3 (en) * | 2003-03-03 | 2007-08-01 | Schott AG | Metal fusing material and method for manufacturing a carrier for a duct with metal fusing material |
WO2008064858A1 (en) | 2006-11-28 | 2008-06-05 | Schott Ag | Firing apparatus for a pyrotechnic protection apparatus |
US20080250963A1 (en) * | 2003-03-03 | 2008-10-16 | Schott Ag | Metal fixing material bushing and method for producing a base plate of a metal fixing material bushing |
US20130239834A1 (en) * | 2012-03-14 | 2013-09-19 | A & O Technologie Gmbh | Igniter base for pyrotechnic devices |
US8733250B2 (en) | 2006-01-27 | 2014-05-27 | Schott Ag | Metal-sealing material-feedthrough and utilization of the metal-sealing material feedthrough with an airbag, a belt tensioning device, and an ignition device |
EP2743632A1 (en) * | 2012-12-11 | 2014-06-18 | Nederlandse Organisatie voor toegepast -natuurwetenschappelijk onderzoek TNO | Miniature electro-pyrotechnic igniter, and ignition head for the same |
US9423218B2 (en) | 2010-09-17 | 2016-08-23 | Schott Ag | Method for producing a ring-shaped or plate-like element |
US20180299235A1 (en) * | 2017-04-13 | 2018-10-18 | Agency For Defense Development | Initiator for rocket motor |
US10684102B2 (en) | 2010-09-17 | 2020-06-16 | Schott Ag | Method for producing a ring-shaped or plate-like element |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2756030C1 (en) * | 2021-01-11 | 2021-09-24 | Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" (Госкорпорация "Росатом") | Induction detonator (options) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2926566A (en) * | 1956-11-30 | 1960-03-01 | Walter W Atkins | Device for accelerating the ignition of the propellant for a projectile |
US2982639A (en) * | 1953-01-27 | 1961-05-02 | William A Gey | Explosive compositions |
US2992087A (en) * | 1959-11-03 | 1961-07-11 | Du Pont | New explosive |
US3040660A (en) * | 1944-11-08 | 1962-06-26 | Lawrence H Johnston | Electric initiator with exploding bridge wire |
US3048507A (en) * | 1956-12-31 | 1962-08-07 | Hercules Powder Co Ltd | Matchhead igniters and compositions and method for their manufacture |
US3054258A (en) * | 1957-10-28 | 1962-09-18 | Standard Oil Co | Temperature rise retardation of surfaces exposed to heat |
US3059576A (en) * | 1958-09-26 | 1962-10-23 | Conax Corp | Electrically fired detonator |
-
0
- BE BE632157D patent/BE632157A/xx unknown
- NL NL133269D patent/NL133269C/xx active
- NL NL292575D patent/NL292575A/xx unknown
-
1962
- 1962-05-10 US US193729A patent/US3134329A/en not_active Expired - Lifetime
-
1963
- 1963-05-08 GB GB18174/62A patent/GB972664A/en not_active Expired
- 1963-05-10 CH CH590663A patent/CH439051A/en unknown
- 1963-05-10 DE DET23979A patent/DE1235205B/en active Pending
- 1963-05-10 SE SE5219/63A patent/SE321431B/xx unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3040660A (en) * | 1944-11-08 | 1962-06-26 | Lawrence H Johnston | Electric initiator with exploding bridge wire |
US2982639A (en) * | 1953-01-27 | 1961-05-02 | William A Gey | Explosive compositions |
US2926566A (en) * | 1956-11-30 | 1960-03-01 | Walter W Atkins | Device for accelerating the ignition of the propellant for a projectile |
US3048507A (en) * | 1956-12-31 | 1962-08-07 | Hercules Powder Co Ltd | Matchhead igniters and compositions and method for their manufacture |
US3054258A (en) * | 1957-10-28 | 1962-09-18 | Standard Oil Co | Temperature rise retardation of surfaces exposed to heat |
US3059576A (en) * | 1958-09-26 | 1962-10-23 | Conax Corp | Electrically fired detonator |
US2992087A (en) * | 1959-11-03 | 1961-07-11 | Du Pont | New explosive |
Cited By (62)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3272127A (en) * | 1963-08-05 | 1966-09-13 | Robert E Betts | Igniter squib |
DE1258771B (en) * | 1965-03-09 | 1968-01-11 | Montage Technik Anstalt F | Process for firing propellant charges for powder-powered bolt setting tools and propellant charge for this |
US3831523A (en) * | 1967-01-04 | 1974-08-27 | Us Army | Electroexplosive device |
US3791298A (en) * | 1971-01-18 | 1974-02-12 | France Etat | Electrical switching device employing a vaporizable conductive element |
FR2307248A1 (en) * | 1973-07-12 | 1976-11-05 | Poudres & Explosifs Ste Nale | Igniter assembly for propellant or other charges - with directional divergent beam of incandescent particles and casing constructed to resist premature disintegration |
US4686903A (en) * | 1984-05-21 | 1987-08-18 | Ems-Inventia AG | Method of manufacturing a pole body for an electric fuse, pole body for an electric fuse and method of using the pole body |
US4715280A (en) * | 1984-05-24 | 1987-12-29 | Ems-Inventa Ag | Pole body for an electric fuze, method of manufacturing and method of using the pole body |
US4831932A (en) * | 1987-08-17 | 1989-05-23 | Honeywell Inc. | Detonator |
US4878430A (en) * | 1987-10-20 | 1989-11-07 | Dynamit Nobel Aktiengesellschaft | Detonator pellet |
DE3735405A1 (en) * | 1987-10-20 | 1989-05-11 | Dynamit Nobel Ag | IGNITION PILL |
DE3735405C2 (en) * | 1987-10-20 | 1998-07-30 | Dynamit Nobel Ag | Firing pill |
US4938137A (en) * | 1989-06-05 | 1990-07-03 | Guay Roland H | Exploding bridgewire driven multiple flyer detonator |
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 |
US5140906A (en) * | 1991-11-05 | 1992-08-25 | Ici Americas, Inc. | Airbag igniter having double glass seal |
US5404263A (en) * | 1992-08-27 | 1995-04-04 | Oea, Inc. | All-glass header assembly used in an inflator system |
US6274252B1 (en) * | 1994-08-04 | 2001-08-14 | Coors Ceramics Company | Hermetic glass-to-metal seal useful in headers for airbags |
US5709724A (en) * | 1994-08-04 | 1998-01-20 | Coors Ceramics Company | Process for fabricating a hermetic glass-to-metal seal |
US5691499A (en) * | 1996-08-07 | 1997-11-25 | Morton International, Inc. | Bridgewire ladder initiator |
US5988069A (en) * | 1996-11-12 | 1999-11-23 | Universal Propulsion Company, Inc. | Electric initiator having a sealing material forming a ceramic to metal seal |
US5939660A (en) * | 1997-03-12 | 1999-08-17 | Trw Inc. | Inflator for an inflatable vehicle occupant protection device |
US6422145B1 (en) | 1997-11-06 | 2002-07-23 | Rocktek Ltd. | Controlled electromagnetic induction detonation system for initiation of a detonatable material |
FR2781878A1 (en) * | 1998-07-31 | 2000-02-04 | Giat Ind Sa | PROCESS FOR IMPLEMENTING A PYROTECHNIC SUBSTANCE AND PYROTECHNIC INITIATOR OBTAINED WITH SUCH A METHOD |
WO2000008412A1 (en) * | 1998-07-31 | 2000-02-17 | Giat Industries | Method for preparing a pyrotechnic substance and resulting pyrotechnic initiator |
US6230624B1 (en) | 1999-08-13 | 2001-05-15 | Trw Inc. | Igniter having a hot melt ignition droplet |
US6708619B2 (en) | 2000-02-29 | 2004-03-23 | Rocktek Limited | Cartridge shell and cartridge for blast holes and method of use |
EP1377791A1 (en) * | 2001-03-31 | 2004-01-07 | Robert Bosch Gmbh | Bridge igniter |
US6679175B2 (en) | 2001-07-19 | 2004-01-20 | Rocktek Limited | Cartridge and method for small charge breaking |
US20040007911A1 (en) * | 2002-02-20 | 2004-01-15 | Smith David Carnegie | Apparatus and method for fracturing a hard material |
US20060222881A1 (en) * | 2003-03-03 | 2006-10-05 | Schott Ag | Metal fixing material bushing and method for producing a base plate of a metal fixing material bushing |
CN100393555C (en) * | 2003-03-03 | 2008-06-11 | 肖特股份公司 | Metal-fixed material bushing and method of mfg. substrate of such bushing |
US20040216631A1 (en) * | 2003-03-03 | 2004-11-04 | Thomas Fink | Metal fixing material bushing and method for producing a base plate of a metal fixing material bushing |
EP1455160A1 (en) * | 2003-03-03 | 2004-09-08 | Schott Glas | Metal-fixing-material-passage and method of manufacturing a header with a metal-fixing-material-passage |
US8327765B2 (en) | 2003-03-03 | 2012-12-11 | Schott Ag | Metal fixing material bushing and method for producing a base plate of a metal fixing material bushing |
EP1808667A3 (en) * | 2003-03-03 | 2007-08-01 | Schott AG | Metal fusing material and method for manufacturing a carrier for a duct with metal fusing material |
US8276514B2 (en) | 2003-03-03 | 2012-10-02 | Schott Ag | Metal fixing material bushing and method for producing a base plate of a metal fixing material bushing |
US20100229616A1 (en) * | 2003-03-03 | 2010-09-16 | Schott Ag | Metal fixing material bushing and method for producing a base plate of a metal fixing material bushing |
JP2010133698A (en) * | 2003-03-03 | 2010-06-17 | Schott Ag | Metal fixing material bush, and method of manufacturing core of metal fixing material bush |
EP1808667B1 (en) | 2003-03-03 | 2016-06-08 | Schott AG | Metal fusing material and method for manufacturing a carrier for a duct with metal fusing material |
US20080250963A1 (en) * | 2003-03-03 | 2008-10-16 | Schott Ag | Metal fixing material bushing and method for producing a base plate of a metal fixing material bushing |
EP1457758A1 (en) * | 2003-03-08 | 2004-09-15 | Dynamit Nobel AIS GmbH Automotive Ignition Systems | Glass-passage for pyrotechnical initiator |
US8733250B2 (en) | 2006-01-27 | 2014-05-27 | Schott Ag | Metal-sealing material-feedthrough and utilization of the metal-sealing material feedthrough with an airbag, a belt tensioning device, and an ignition device |
EP2187162A2 (en) | 2006-01-27 | 2010-05-19 | Schott AG | Glass-to-fixing-material bushing and use thereof as well as airbag and seat-belt tensioner with an initiatot |
EP3104114A1 (en) | 2006-01-27 | 2016-12-14 | Schott Ag | Metal fusing material and method for manufacturing a carrier for a duct with metal fusing material |
US20070187934A1 (en) * | 2006-01-27 | 2007-08-16 | Thomas Fink | Metal-sealing material-feedthrough and utilization of the metal-sealing material feedthrough with an airbag, a belt tensioning device, and an ignition device |
EP2270417A2 (en) | 2006-01-27 | 2011-01-05 | Schott Ag | Glass-to-fixing-material seal and use thereof as well as airbag and seat-belt tensioner with an initiator |
US8127681B2 (en) | 2006-01-27 | 2012-03-06 | Schott Ag | Metal-sealing material-feedthrough and utilization of the metal-sealing material feedthrough with an airbag, a belt tensioning device, and an ignition device |
DE102006004036A1 (en) * | 2006-01-27 | 2007-08-09 | Schott Ag | Metal fixing material implementation and use of such a passage and airbag and belt tensioner with an ignition device |
EP1813906A1 (en) | 2006-01-27 | 2007-08-01 | Schott AG | Glass-to-fixing-material bushing and use thereof as well as airbag and seat-belt tensioner with an initiatot |
US8205554B2 (en) | 2006-11-28 | 2012-06-26 | Schott Ag | Firing apparatus for a pyrotechnic protection apparatus |
US20100064923A1 (en) * | 2006-11-28 | 2010-03-18 | Schott Ag | Firing apparatus for a pyrotechnic protection apparatus |
WO2008064858A1 (en) | 2006-11-28 | 2008-06-05 | Schott Ag | Firing apparatus for a pyrotechnic protection apparatus |
DE112007002750B4 (en) * | 2006-11-28 | 2014-11-20 | Schott Ag | Ignition device for a pyrotechnic protection device |
US9423218B2 (en) | 2010-09-17 | 2016-08-23 | Schott Ag | Method for producing a ring-shaped or plate-like element |
US9651345B2 (en) | 2010-09-17 | 2017-05-16 | Schott Ag | Method for producing a ring-shaped or plate-like element |
US10684102B2 (en) | 2010-09-17 | 2020-06-16 | Schott Ag | Method for producing a ring-shaped or plate-like element |
US8967047B2 (en) * | 2012-03-14 | 2015-03-03 | A & O Technologie Gmbh | Igniter base for pyrotechnic devices |
US20130239834A1 (en) * | 2012-03-14 | 2013-09-19 | A & O Technologie Gmbh | Igniter base for pyrotechnic devices |
WO2014092565A1 (en) * | 2012-12-11 | 2014-06-19 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | Miniature electro-pyrotechnic igniter, and ignition head for the same |
US20150308805A1 (en) * | 2012-12-11 | 2015-10-29 | Nederlandse Organisatie Voor Toegepast- Natuurwetenschappelijk Onderzoek Tno | Miniature electro-pyrotechnic igniter, and ignition head for the same |
EP2743632A1 (en) * | 2012-12-11 | 2014-06-18 | Nederlandse Organisatie voor toegepast -natuurwetenschappelijk onderzoek TNO | Miniature electro-pyrotechnic igniter, and ignition head for the same |
US20180299235A1 (en) * | 2017-04-13 | 2018-10-18 | Agency For Defense Development | Initiator for rocket motor |
US10634467B2 (en) * | 2017-04-13 | 2020-04-28 | Agency For Defense Development | Initiator for rocket motor |
Also Published As
Publication number | Publication date |
---|---|
CH439051A (en) | 1967-06-30 |
BE632157A (en) | |
GB972664A (en) | 1964-10-14 |
DE1235205B (en) | 1967-02-23 |
NL292575A (en) | |
SE321431B (en) | 1970-03-02 |
NL133269C (en) |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3134329A (en) | Exploding bridgewire coating | |
RU2170224C2 (en) | Pyrotechnic charge for detonators | |
US3062147A (en) | Igniter for solid propellant grains | |
US5027707A (en) | Electric primer with reduced RF and ESD hazard | |
US2717204A (en) | Blasting initiator composition | |
GB2176178A (en) | Liquid-disabled blasting cap and ignition composition useful therein | |
US3062143A (en) | Detonator | |
US4374686A (en) | Delay composition for detonators | |
US4070970A (en) | Electro-explosive igniters | |
US1999820A (en) | Delay cap | |
US2801585A (en) | Squib | |
US3100447A (en) | Igniter squib | |
US2400103A (en) | Detonator or blasting cap | |
US5043030A (en) | Stab initiator | |
US3160097A (en) | Molybdenum trioxide-aluminum explosive and exploding bridgewire detonator therefor | |
US4208967A (en) | Squib design | |
US1890112A (en) | Igniter charge for blasting caps | |
US2624280A (en) | Electric initiator | |
US3286628A (en) | Electric detonator ignition systems | |
US2008366A (en) | Igniter powder | |
US2363863A (en) | Priming composition | |
US3713385A (en) | Electroexplosive devices | |
PL181960B1 (en) | Igniting elements suitable for precise adjustment of cap composition | |
US2995086A (en) | Fuseheads | |
GB1263574A (en) | Igniter for propellants |