GB671030A - Improvements in or relating to hollow or cavity explosive charges - Google Patents
Improvements in or relating to hollow or cavity explosive chargesInfo
- Publication number
- GB671030A GB671030A GB464347A GB464347A GB671030A GB 671030 A GB671030 A GB 671030A GB 464347 A GB464347 A GB 464347A GB 464347 A GB464347 A GB 464347A GB 671030 A GB671030 A GB 671030A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- charge
- explosive
- metal
- blasting
- 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
- F42B3/08—Blasting cartridges, i.e. case and explosive with cavities in the charge, e.g. hollow-charge blasting cartridges
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
671,030. Blasting cartridges. DOWIE, D. L. Dec. 29, 1947. [Feb. 18, 1947; Dec. 23, 1947] Nos. 4643/47 and 33985/47. Class 9 (i). A cylindrical explosive charge for blasting in mining operations has a cavity containing a tube 1, whose length is more than five times its diameter, and a detonator 8 for initiating the explosive placed beyond a closed end 5 of the tube. The tube 1 has a flat end wall 3 protruding from the charge into an inert centring ring 4. The tube may be sealed at both ends and evacuated, and the inner end 5 is preferably conical. The tube may be of metal or glass with an internal coating 2 of copper or other metal. The explosive charge may consist of a layer 6 of explosive having a high detonation velocity covered by a layer 7 of lower velocity. Alternatively the charge may be built up of discrete annuli surrounding the evacuated tube, a normal blasting charge being tamped in pn top of the annuli. In yet another form inert material is loaded into the explosive to progressively decrease its density away from the point of initiation. A wrapper 9 of paper or metal may encase the charge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB464347A GB671030A (en) | 1947-02-18 | 1947-02-18 | Improvements in or relating to hollow or cavity explosive charges |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB464347A GB671030A (en) | 1947-02-18 | 1947-02-18 | Improvements in or relating to hollow or cavity explosive charges |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB671030A true GB671030A (en) | 1952-04-30 |
Family
ID=9781064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB464347A Expired GB671030A (en) | 1947-02-18 | 1947-02-18 | Improvements in or relating to hollow or cavity explosive charges |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB671030A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2169690A (en) * | 1984-11-23 | 1986-07-16 | Du Pont Canada | Explosive device and method of use therefor |
-
1947
- 1947-02-18 GB GB464347A patent/GB671030A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2169690A (en) * | 1984-11-23 | 1986-07-16 | Du Pont Canada | Explosive device and method of use therefor |
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