GB636792A - Electric blasting initiators and methods of producing the same - Google Patents
Electric blasting initiators and methods of producing the sameInfo
- Publication number
- GB636792A GB636792A GB1214948A GB1214948A GB636792A GB 636792 A GB636792 A GB 636792A GB 1214948 A GB1214948 A GB 1214948A GB 1214948 A GB1214948 A GB 1214948A GB 636792 A GB636792 A GB 636792A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plug
- wires
- compositions
- pieces
- rubber
- 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
- F42B3/103—Mounting initiator heads in initiators; Sealing-plugs
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Instructional Devices (AREA)
Abstract
636,792. Blasting-fuzes. HOWDEN, J. R. (Du Pont de Nemours & Co., E. I.). May 3, 1948, No. 12149. [Class 9 (i)] An electric blasting-fuze is closed by a bridge plug formed by assembling two semi-cylindrical pieces 1, 2 of resilient material around legwires 5, 6 and securing the pieces together by an annulet 4 of ductile material. Each plug piece has complementary grooves 3 to accommodate the leg-wires. A bridge-wire 7 is fixed to the leg-wires and the assembled plug is inserted into a charged shell. The grooves 3 may be omitted and the surface of the legwires may be knurled or the wires may be distorted to increase the grip of the plug on the wires. The plug may be of rubber or synthetic rubber such as polymerized butadiene compositions, neoprene or polymerized chloroprene compositions, or polybutylene compositions. The annulet may be of steel, copper or aluminium and the plug pieces may be of other shapes which fitted together give a plug of circular cross-section. The plug is inserted in a shell containing a detonating charge such as tetryl with a superposed primary charge of mercury fulminate. A water-proof coating of rubber cement or wax may be applied to the plug.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE483134D BE483134A (en) | 1948-05-03 | ||
| GB1214948A GB636792A (en) | 1948-05-03 | 1948-05-03 | Electric blasting initiators and methods of producing the same |
| FR966230D FR966230A (en) | 1948-05-03 | 1948-05-15 | Electric firing cartridge which may have a two-part rubber stopper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1214948A GB636792A (en) | 1948-05-03 | 1948-05-03 | Electric blasting initiators and methods of producing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB636792A true GB636792A (en) | 1950-05-03 |
Family
ID=9999243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1214948A Expired GB636792A (en) | 1948-05-03 | 1948-05-03 | Electric blasting initiators and methods of producing the same |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE483134A (en) |
| FR (1) | FR966230A (en) |
| GB (1) | GB636792A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884815A (en) * | 2017-12-13 | 2018-04-06 | 山东大学 | Suitable for the detonator anti-drop device and method of tunnel seismic wave method advance geologic prediction |
-
0
- BE BE483134D patent/BE483134A/xx unknown
-
1948
- 1948-05-03 GB GB1214948A patent/GB636792A/en not_active Expired
- 1948-05-15 FR FR966230D patent/FR966230A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884815A (en) * | 2017-12-13 | 2018-04-06 | 山东大学 | Suitable for the detonator anti-drop device and method of tunnel seismic wave method advance geologic prediction |
| CN107884815B (en) * | 2017-12-13 | 2023-09-15 | 山东大学 | Detonator anti-drop device and method suitable for advanced geological prediction by tunnel seismic wave method |
Also Published As
| Publication number | Publication date |
|---|---|
| FR966230A (en) | 1950-10-04 |
| BE483134A (en) |
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