GB999286A - Improvements in and relating to blasting - Google Patents
Improvements in and relating to blastingInfo
- Publication number
- GB999286A GB999286A GB2001861A GB2001861A GB999286A GB 999286 A GB999286 A GB 999286A GB 2001861 A GB2001861 A GB 2001861A GB 2001861 A GB2001861 A GB 2001861A GB 999286 A GB999286 A GB 999286A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cord
- delay
- milliseconds
- metal
- sheath
- 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
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/04—Arrangements for ignition
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
- C06C5/00—Fuses, e.g. fuse cords
- C06C5/06—Fuse igniting means; Fuse connectors
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Air Bags (AREA)
Abstract
999,286. Detonating fuze cord. E. I. DU. PONT DE NEMOURS & CO. June 2, 1961 [June 3, 1960], No. 20018/61. Heading F3A. A delay initiation cord for use in delay blasting has a continuous cone M of explosive to propagate detonation at velocities of ¢ to 2 milliseconds per foot enclosed in a metal sheath N. The metal may be lead or aluminium and may be further covered by a sheath O of waterproofing and reinforcing material such as a thermoplastic which is extruded round the metal sheath. The explosive and metal tube are manufactured by a drawing process. A use of the invention is shown in Fig. 1, where shot holes B at 20 foot spacings have been connected by dual runs A, A<SP>1</SP> of delay initiation cord. The cord is detonated at I by an initiator E; B 1 is fired first, followed simultaneously by B<SP>1</SP> 1 and B 2 after a delay of 20 milliseconds, followed in turn by simultaneous firing of B 3 , B<SP>1</SP> 2 and B<SP>11</SP> 1 after a further 20 milliseconds. It is stated that very little noise results in the use of the present initiator. Reference has been directed by the Comptroller to Specification, 815,532.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US3371660A | 1960-06-03 | 1960-06-03 | |
| US246537A US3207073A (en) | 1962-12-21 | 1962-12-21 | Explosive cord and assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB999286A true GB999286A (en) | 1965-07-21 |
Family
ID=31949657
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2001861A Expired GB999286A (en) | 1960-06-03 | 1961-06-02 | Improvements in and relating to blasting |
| GB5078863A Expired GB1062179A (en) | 1960-06-03 | 1963-12-23 | Improvements in and relating to blasting |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5078863A Expired GB1062179A (en) | 1960-06-03 | 1963-12-23 | Improvements in and relating to blasting |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB999286A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2517119B (en) | 2013-01-17 | 2021-03-03 | Utm Ltd | Explosive composition for use in telescopically expanding non-lethal training ammunition |
-
1961
- 1961-06-02 GB GB2001861A patent/GB999286A/en not_active Expired
-
1963
- 1963-12-23 GB GB5078863A patent/GB1062179A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1062179A (en) | 1967-03-15 |
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