US1797509A - Electric blasting cap and ignition material for the same - Google Patents
Electric blasting cap and ignition material for the same Download PDFInfo
- Publication number
- US1797509A US1797509A US347915A US34791529A US1797509A US 1797509 A US1797509 A US 1797509A US 347915 A US347915 A US 347915A US 34791529 A US34791529 A US 34791529A US 1797509 A US1797509 A US 1797509A
- Authority
- US
- United States
- Prior art keywords
- charge
- ignition
- electric blasting
- pressed
- lead
- 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
- 239000000463 material Substances 0.000 title description 20
- 238000005422 blasting Methods 0.000 title description 17
- 239000000203 mixture Substances 0.000 description 23
- 150000001875 compounds Chemical class 0.000 description 20
- VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 description 15
- GVCGWXSZNUOTDW-UHFFFAOYSA-N sulfo cyanate Chemical compound OS(=O)(=O)OC#N GVCGWXSZNUOTDW-UHFFFAOYSA-N 0.000 description 14
- MHWLNQBTOIYJJP-UHFFFAOYSA-N mercury difulminate Chemical compound [O-][N+]#C[Hg]C#[N+][O-] MHWLNQBTOIYJJP-UHFFFAOYSA-N 0.000 description 12
- 150000001540 azides Chemical class 0.000 description 9
- 239000000446 fuel Substances 0.000 description 8
- 239000000843 powder Substances 0.000 description 7
- 230000037452 priming Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 239000007800 oxidant agent Substances 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallol Chemical compound OC1=CC=CC(O)=C1O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 description 4
- 150000002148 esters Chemical class 0.000 description 3
- 239000002360 explosive Substances 0.000 description 3
- -1 mercury fulminate Chemical class 0.000 description 3
- USXDFAGDIOXNML-UHFFFAOYSA-N Fulminate Chemical compound [O-][N+]#[C-] USXDFAGDIOXNML-UHFFFAOYSA-N 0.000 description 2
- 239000000020 Nitrocellulose Substances 0.000 description 2
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- IWOUKMZUPDVPGQ-UHFFFAOYSA-N barium nitrate Chemical compound [Ba+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O IWOUKMZUPDVPGQ-UHFFFAOYSA-N 0.000 description 2
- 239000002775 capsule Substances 0.000 description 2
- 229920001220 nitrocellulos Polymers 0.000 description 2
- OXNIZHLAWKMVMX-UHFFFAOYSA-N picric acid Chemical compound OC1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O OXNIZHLAWKMVMX-UHFFFAOYSA-N 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- SPSSULHKWOKEEL-UHFFFAOYSA-N 2,4,6-trinitrotoluene Chemical compound CC1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O SPSSULHKWOKEEL-UHFFFAOYSA-N 0.000 description 1
- 241001083514 Gayophytum Species 0.000 description 1
- AGUIVNYEYSCPNI-UHFFFAOYSA-N N-methyl-N-picrylnitramine Chemical group [O-][N+](=O)N(C)C1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O AGUIVNYEYSCPNI-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005267 amalgamation Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- XTEGARKTQYYJKE-UHFFFAOYSA-M chlorate Inorganic materials [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 1
- LOFVHTJAUDXGSG-UHFFFAOYSA-N copper;sulfo cyanate Chemical compound [Cu].OS(=O)(=O)OC#N LOFVHTJAUDXGSG-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- AXZAYXJCENRGIM-UHFFFAOYSA-J dipotassium;tetrabromoplatinum(2-) Chemical compound [K+].[K+].[Br-].[Br-].[Br-].[Br-].[Pt+2] AXZAYXJCENRGIM-UHFFFAOYSA-J 0.000 description 1
- SNFOERUNNSHUGP-ZXZARUISSA-N erythrityl tetranitrate Chemical compound [O-][N+](=O)OC[C@@H](O[N+]([O-])=O)[C@@H](O[N+]([O-])=O)CO[N+]([O-])=O SNFOERUNNSHUGP-ZXZARUISSA-N 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- ISEQAARZRCDNJH-UHFFFAOYSA-N lead(ii) azide Chemical compound [N-]=[N+]=N[Pb]N=[N+]=[N-] ISEQAARZRCDNJH-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229910001487 potassium perchlorate Inorganic materials 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- IXHMHWIBCIYOAZ-UHFFFAOYSA-N styphnic acid Chemical class OC1=C([N+]([O-])=O)C=C([N+]([O-])=O)C(O)=C1[N+]([O-])=O IXHMHWIBCIYOAZ-UHFFFAOYSA-N 0.000 description 1
- YPMOSINXXHVZIL-UHFFFAOYSA-N sulfanylideneantimony Chemical compound [Sb]=S YPMOSINXXHVZIL-UHFFFAOYSA-N 0.000 description 1
- 239000000015 trinitrotoluene Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B43/00—Compositions characterised by explosive or thermic constituents not provided for in groups C06B25/00 - C06B41/00
Definitions
- This invention relates to electric blasting caps, and more particularly to an improved ignition mixture for the same, and consists essentially in the use of a mixture of a sulphocyanate, an oxidizing agent, and a low flash point fuel as an ignition material for the blasting caps.
- Electric blasting caps as commonly manufactured, comprise a metallic shell containing a pressed explosive charge and an igniter.
- the pressed explosive charge has been a single charge of a primary detonating compound such as mercury fulminate, or a mixture of this material with an oxidizing agent such as potassium chlorate; and in other cases it has consisted of two separate charges, one a base charge and the other a primer charge.
- the explosives used for the base charge have been, for example, trinitrotoluene, picric acid, tetranitromethylaniline (tetryl) tetranitropenterythrite, erythrol tetranitrate, nitrated ivory nut meal, and ground smokeless powder.
- priming charge there have been used primary detonating compounds, such as mercury fulminate, cyanurtriazide, and lead axide, various oxidizing agents such as potassium chlorate being often mixed with the priming compound, and various ignition and binding compounds such as lead tritroresorcinate being often mixed with or superimposed upon the more difiicultly ignitible primers such as lead azide.
- primary detonating compounds such as mercury fulminate, cyanurtriazide, and lead axide
- various oxidizing agents such as potassium chlorate
- ignition and binding compounds such as lead tritroresorcinate being often mixed with or superimposed upon the more difiicultly ignitible primers such as lead azide.
- an inner capsule has been used with the primer charge in order to get additional confinement, and thereby increase the efiiciency of the detonator, while in other cases no such capsule has been employed.
- mercury fulminate either alone or with potassium chlorate, mixtures of mercury fulminate, antimony sulphide, potassium chlorate, and gun cotton.
- a mixture comprising eighty parts of mercury fulminate and twenty parts of potassium chlorate has been, in most common use.
- mercury fulminate cannot be used in certain metallic shells because the free mercury, almost invariably present as impurity in fulminate, caused oxidation of or an amalgamation with such metals; for example, mercury fulminate cannot be satisfactorily used in alumir'im shells, which shells have been almos1 universally employed with lead azide primed detonators. Also mixtures of mercury fulminate and potassium chlorate when used in contact with lead azide, have been generally considered responsible for spontaneous explosions and therefore incompatible.
- F urthermore, mercury fulminate and potassium chlorate mixtures are hydroscopic. In moist condition they exert a powerful corrosive action on certain metals and alloys whose other properties aresatisfactory for bridge wires; it has, therefore, been necessary in many cases to use expensive metals, such as platinum, for bridge wires in order to overcome this corrosion. Also, when moist, these mixtures frequently fail to ignite.
- the object of my invention is to provide an ignition compound for electric blasting caps which is cheaper than those most C0111- monly used heretofore.
- a further object is to provide an ignition compound which may be used in any of the metals which have heretofore been used for the manufacture of blasting cap shells, and particularly one which may be used in the presence of lead azide. Further objects will be apparent as the description proceeds.
- a suitable sulphocyanate for this purpose is lead sulphocyanate, although other sulphocyanates may be used, such, for example, as copper sulphocyanate.
- a suitable oxidizing material for use in my composition is potassium chlorate, although I may use other oxidizing agents, such as potassium perchlorate or barium nitrate.
- nitrocellulose or pyro powder is very satisfactory, although any of the low ignition-point fuels, for instance, salts of various organic acids, such as the lead salts of styphnic acid or picric acid, may be used.
- the nitric esters are particularly well suited to my purpose, because of their availability.
- Another example of low flash point nitric esters having satisfactory properties for my purpose is nitro-starch, tho-ugh this mate rial is less satisfactory than ground smoke less powder because of its tendency towards instability and ready moisture absorption.
- composition comprising the above materials in essentiall the proportions given, fires with approximately the same current consumption, and hence at approximately the same temperature as a mixture of eighty parts of mercury fulminate and twenty parts of potassium chlorate.
- Such a composition may be used in any of the metallic shells employed in the industry, and is entirely compatible with either mercury fulminate or lead azide priming compositions.
- it will fire with a current consumption approximating that required by dried material, and in this moist condition it exerts no corrosive action on common alloys used for bridge wires.
- the scnsitiveness of this ignition mixture to both shock and friction, is lower than that of fulminate-chlorate mixtures, and for that reason it may be handled. and used with less hazard.
- compositions comprising my invention may be arranged in the metallic shell in any suitable manner according to the practice in making electric blasting caps.
- like characters represent the same elements as shown in Figure 1, except i designates the lead azide-lead styphnate compound in place of the 90-10 F.
- An electric blasting cap comprising a metallic shell, a pressed detonating charge, a loose charge of ignition material consisting of a mixture of sulphocyanate, an oxidizing compound and a low ignition point fuel, and a bridge wire attached to current leading wires embedded in said loose charge.
- An electric blasting cap comprising a metallic shell, a pressed charge of a secondary detonating compound, a pressed charge of a primary detonating compound, a loose charge of ignition material consisting of a mixture of sulphocyanate, an oxidizing compound and a low ignition point fuel, and a bridge wire attached to current leading wires embedded in said loose charge.
- An electric blasting cap comprising a metallic shell, a pressed charge of a secondary detonating compound, a pressed charge of a primary detonating compound, a loose charge of ignition material consisting of a mixture of lead sulphocyanate, potassium chlorate and a low ignition point fuel, and a bridge wire attached to current leading wires embedded in said loose charge.
- An electric blasting cap comprising a metallic shell, a pressed charge of a secondary detonating compound, a pressed charge of a primary detonating compound, a loose charge of ignition material consisting of a mixture of lead sulphocyanate, potassium chlorate and a low ignition point nitric ester, and a bridge wire attached'to current leading wires embedded in said loose charge.
- An electric blasting cap comprising a metallic shell, a pressed charge of a secondary detonating compound, a pressed charge of a primary detonating compound, a loose charge of ignition material consisting of a mixture .of lead sulphocyanate, potassium chlorate and ground pyro powder, and a bridge wire attached to current leading wires embedded in said loose charge.
- An electric blasting cap comprising a metallic shell, a pressed charge of a secondary detonating compound, a pressed charge of a primary detonating compound, a loose charge of ignition material consisting of a mixture of from 3050% lead sulphocyanate, 1030% potassium chlorate and 3050% ground pyro powder, and a bridge wire attached to current leading wires embedded in said loose charge.
- An electric blasting cap comprising a metallic shell, a pressed base charge of tetranitromethylaniline, a pressed priming charge of lead azide together with an ignition and binding material either mixed with or superimposed upon said lead azide, a loose ignition charge consisting of a sulphocyanate, an oxidizing compound and a low ignition point fuel, and a bridged wire attached to current leading Wires embedded in said loose charge.
- An electric blasting cap comprising a metallic shell, a pressed base charge of tetranitromethylaniline, a pressed priming charge of lead azide together with an ignition and binding material either mixed with or superimposed upon said lead azide, a loose ignition charge consisting of lead sulphocyanate, potassium chlorate, and ground pyro powder, and a bridge wire attached to current leading wires embedded in said loose charge.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Air Bags (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US347915A US1797509A (en) | 1929-03-18 | 1929-03-18 | Electric blasting cap and ignition material for the same |
| GB7879/30A GB350036A (enrdf_load_stackoverflow) | 1929-03-18 | 1930-03-11 | |
| DE1930564584D DE564584C (de) | 1929-03-18 | 1930-03-18 | Zwischenzuendpulver fuer elektrische Zuendkapseln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US347915A US1797509A (en) | 1929-03-18 | 1929-03-18 | Electric blasting cap and ignition material for the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1797509A true US1797509A (en) | 1931-03-24 |
Family
ID=23365835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US347915A Expired - Lifetime US1797509A (en) | 1929-03-18 | 1929-03-18 | Electric blasting cap and ignition material for the same |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1797509A (enrdf_load_stackoverflow) |
| DE (1) | DE564584C (enrdf_load_stackoverflow) |
| GB (1) | GB350036A (enrdf_load_stackoverflow) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2427899A (en) * | 1940-09-04 | 1947-09-23 | Du Pont | Blasting cap |
| US2624280A (en) * | 1948-01-09 | 1953-01-06 | Hercules Powder Co Ltd | Electric initiator |
| US3109369A (en) * | 1944-05-31 | 1963-11-05 | Harold J Plumley | Disposal of encased explosives |
| RU2289562C1 (ru) * | 2005-03-10 | 2006-12-20 | Федеральное государственное унитарное предприятие "Научно-производственное предприятие "Краснознаменец" | Термостойкий воспламенительный состав для электровоспламенителя |
| CN110343023A (zh) * | 2019-07-15 | 2019-10-18 | 浙江物产光华民爆器材有限公司 | 一种电点火管用点火药及其制造方法 |
| CN116444325A (zh) * | 2023-03-23 | 2023-07-18 | 无锡盛景微电子股份有限公司 | 一种数码电子雷管发火药剂及其制备方法和应用 |
-
1929
- 1929-03-18 US US347915A patent/US1797509A/en not_active Expired - Lifetime
-
1930
- 1930-03-11 GB GB7879/30A patent/GB350036A/en not_active Expired
- 1930-03-18 DE DE1930564584D patent/DE564584C/de not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2427899A (en) * | 1940-09-04 | 1947-09-23 | Du Pont | Blasting cap |
| US3109369A (en) * | 1944-05-31 | 1963-11-05 | Harold J Plumley | Disposal of encased explosives |
| US2624280A (en) * | 1948-01-09 | 1953-01-06 | Hercules Powder Co Ltd | Electric initiator |
| RU2289562C1 (ru) * | 2005-03-10 | 2006-12-20 | Федеральное государственное унитарное предприятие "Научно-производственное предприятие "Краснознаменец" | Термостойкий воспламенительный состав для электровоспламенителя |
| CN110343023A (zh) * | 2019-07-15 | 2019-10-18 | 浙江物产光华民爆器材有限公司 | 一种电点火管用点火药及其制造方法 |
| CN110343023B (zh) * | 2019-07-15 | 2021-04-27 | 浙江物产光华民爆器材有限公司 | 一种电点火管用点火药及其制造方法 |
| CN116444325A (zh) * | 2023-03-23 | 2023-07-18 | 无锡盛景微电子股份有限公司 | 一种数码电子雷管发火药剂及其制备方法和应用 |
Also Published As
| Publication number | Publication date |
|---|---|
| GB350036A (enrdf_load_stackoverflow) | 1931-06-11 |
| DE564584C (de) | 1932-11-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US1797509A (en) | Electric blasting cap and ignition material for the same | |
| US1890112A (en) | Igniter charge for blasting caps | |
| US1935495A (en) | Slow match composition | |
| US2011578A (en) | Explosive | |
| US2350172A (en) | Electric blasting cap | |
| US2402235A (en) | Blasting initiator | |
| US2007223A (en) | Ignition composition | |
| GB1263574A (en) | Igniter for propellants | |
| US1928208A (en) | Safety detonator | |
| US2363863A (en) | Priming composition | |
| US2607672A (en) | Ignition composition | |
| US2422043A (en) | Compound detonator | |
| US1928205A (en) | Detonator and composition for the same | |
| US1906869A (en) | Electric blasting cap | |
| US2708623A (en) | Explosive compound, process of making same and a composition thereof | |
| US1918920A (en) | Ignition composition | |
| US1964825A (en) | Ignition composition | |
| RU2026276C1 (ru) | Пороховой состав | |
| US1964077A (en) | Flash composition | |
| US1984846A (en) | Ignition composition | |
| US2261195A (en) | Explosive composition for detonating rivets | |
| US2867517A (en) | Detonator compositions | |
| US3556009A (en) | Delay initiators | |
| US2031677A (en) | Blasting cap charge | |
| US1488787A (en) | Explosive and process for its manufacture |