GB684811A - Safety device for the prevention of explosion of electric detonators - Google Patents
Safety device for the prevention of explosion of electric detonatorsInfo
- Publication number
- GB684811A GB684811A GB2685/51A GB268551A GB684811A GB 684811 A GB684811 A GB 684811A GB 2685/51 A GB2685/51 A GB 2685/51A GB 268551 A GB268551 A GB 268551A GB 684811 A GB684811 A GB 684811A
- Authority
- GB
- United Kingdom
- Prior art keywords
- metal
- blasting
- covering
- igniter
- charge
- 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
Links
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
- F42B3/18—Safety initiators resistant to premature firing by static electricity or stray currents
-
- 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
- F42B3/18—Safety initiators resistant to premature firing by static electricity or stray currents
- F42B3/182—Safety initiators resistant to premature firing by static electricity or stray currents having shunting means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Air Bags (AREA)
Abstract
684,811. Blasting fuzes. WEREIDE, T., and PLATOU, E. Feb. 2, 1951 [Oct. 17, 1950], No. 2685/51. Class 9(i) An electric detonator is screened against ignition by stray currents by enclosing the lead wires in a structure forming with the detonator casing an electrically conducting shield. Fig. 3 shows a blasting cap comprising an aluminium casing 1 containing a charge 2, e.g. lead azide and tetryl, a delay element 3 and an igniter 4. A perforated member separates the charge 2 from the delay element and the ignition material is carried bv a wire filament 5, e.g. platinum, connecting electric conductors 7 passing through a closure 6. The conductors 7 consist of copper wires 9 covered by an insulating layer 10 over which a metal covering 8 is placed. This metal covering may be aluminium or tin foil or a metal sheath pressed around the wire. The covering 8 is connected to the metal case of the igniter, both electrically and mechanically, by shrinking, pressing, soldering, welding, or by a wrapping of metal foil. The free ends of the leads 7 are connected to a current source or in series with other blasting caps.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO297846X | 1950-10-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB684811A true GB684811A (en) | 1952-12-24 |
Family
ID=19905169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2685/51A Expired GB684811A (en) | 1950-10-17 | 1951-02-02 | Safety device for the prevention of explosion of electric detonators |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE506411A (en) |
CH (1) | CH297846A (en) |
DE (1) | DE876824C (en) |
FR (1) | FR1043887A (en) |
GB (1) | GB684811A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE963942C (en) * | 1954-03-03 | 1957-05-16 | Gevelot S A | Safety transport packaging for electric detonators |
DE1097338B (en) * | 1959-06-27 | 1961-01-12 | Ernst Kauder | Electric safety igniter |
-
0
- BE BE506411D patent/BE506411A/xx unknown
-
1951
- 1951-02-02 GB GB2685/51A patent/GB684811A/en not_active Expired
- 1951-10-11 CH CH297846D patent/CH297846A/en unknown
- 1951-10-16 FR FR1043887D patent/FR1043887A/en not_active Expired
- 1951-10-17 DE DEI4740A patent/DE876824C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CH297846A (en) | 1954-04-15 |
DE876824C (en) | 1953-05-18 |
FR1043887A (en) | 1953-11-12 |
BE506411A (en) |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2696191A (en) | Electrically operated primer | |
US4354432A (en) | Hot-wire ignition initiator for propellant charges | |
US4829390A (en) | Electrical switch and circuitry for appliance | |
NO170799B (en) | INITIAL ELEMENT OF PRIMARY EXPLOSION-FREE TYPE AND USE IT IN A PRIMARY EXPLOSION-FREE EXPLOSION CAPS | |
US3332350A (en) | Electric blasting cap having heatshrinkable plastic-covered match assembly | |
US2408125A (en) | Means for safeguarding electric igniters of blasting detonators against accidental firing | |
NO156565B (en) | PROCEDURE FOR PREPARING AN ALKYL MARKETING. | |
GB2018959A (en) | Electric Safety Squib | |
US3022446A (en) | Detonator device | |
US4380958A (en) | Electrostatic safe electric match | |
US2408124A (en) | Means for safeguarding electric igniters of blasting detonators against accidental firing | |
GB684811A (en) | Safety device for the prevention of explosion of electric detonators | |
US1832052A (en) | Electric mine firing device | |
US3249047A (en) | Electric squib device with insulated resistance bridge wire | |
ES346910A1 (en) | Self-disarming electric blasting caps and assembly containing same | |
US3371607A (en) | Arrangement for increasing the safety against unintentional initiation of socalled low energy detonating cord assemblies | |
US2086532A (en) | Electric blasting initiator | |
GB681481A (en) | Improvements in or relating to electric detonators and electric blasting assemblies | |
US2086527A (en) | Electric blasting initiator | |
US3125025A (en) | Pyrotechnic igniter | |
US3024728A (en) | Delay electric explosion initiator | |
US4036139A (en) | Electrically initiated fuse ignitor | |
US2248587A (en) | Explosive | |
US3789762A (en) | Device to prevent accidental ignition of electro-explosives from electrostatic discharge | |
ES356570A1 (en) | Improvements in or relating to explosive devices provided with electric fuses |