GB614761A - Improvements in or relating to blasting assemblies - Google Patents
Improvements in or relating to blasting assembliesInfo
- Publication number
- GB614761A GB614761A GB22299/46A GB2229946A GB614761A GB 614761 A GB614761 A GB 614761A GB 22299/46 A GB22299/46 A GB 22299/46A GB 2229946 A GB2229946 A GB 2229946A GB 614761 A GB614761 A GB 614761A
- Authority
- GB
- United Kingdom
- Prior art keywords
- charge
- fuze
- electric
- firing
- head
- 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
- F42B3/04—Blasting cartridges, i.e. case and explosive for producing gas under pressure
- F42B3/06—Blasting cartridges, i.e. case and explosive for producing gas under pressure with re-utilisable case
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Air Bags (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
614,761. Blasting devices. THOMSON, T., REID, K. C., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. July 26, 1946, No. 22299. [Class 9 (i)] Relates to blasting devices of the type in which a pressure-resisting container is separated from a perforated dischargehead by a closure adapted to yield at a predetermined internal gas pressure produced by a non- detonating gas - evolving charge the gases being evolved without flame as in Specification 431,935. According to the invention such a device containing a granular charge of a mixture of sodium nitrite and ammonium chloride stabilised by an alkaline is actuated by electrically fired local heating means comprising an electric black powder fuze having a sheathing of a perchlorate. A pressureresisting container 1 having a firing head 2 is separated from a discharge head 3 by a rupturable disc 4. A 460 gm. charge 7 of a stabilised mixture of sodium nitrite and ammonium chloride in the container 1 is initiated by an electric fuze 6. Insulated leads 5 of the fuze 6 are connected through terminals in the firing head to the electric circuit. The fuze 6 consists of a paper tube closed by plugs 8, 9 and 17 and containing a 20 gm. charge 11 of ammonium perchlorate surrounding a 60 grain charge 16 of black powder in a paper tube 12. A low-tension electric fuze-head 15 is embedded in the black powder. The charge of ammonium perchlorate acts as a booster, reducing the delay between closing of the firing circuit and venting of the gases from the initiated charge 7 to about 30 millisecs. Thus an assembly of a plurality of these devices may be electrically connected for simultaneous shot firing. Specification 461,647 also is referred to.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE474847D BE474847A (en) | 1946-07-26 | ||
US2563491D US2563491A (en) | 1946-07-26 | Blasting assembly | |
GB22299/46A GB614761A (en) | 1946-07-26 | 1946-07-26 | Improvements in or relating to blasting assemblies |
FR949410D FR949410A (en) | 1946-07-26 | 1947-07-16 | Improvements to blasting devices |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB22299/46A GB614761A (en) | 1946-07-26 | 1946-07-26 | Improvements in or relating to blasting assemblies |
Publications (1)
Publication Number | Publication Date |
---|---|
GB614761A true GB614761A (en) | 1948-12-22 |
Family
ID=10177131
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB22299/46A Expired GB614761A (en) | 1946-07-26 | 1946-07-26 | Improvements in or relating to blasting assemblies |
Country Status (4)
Country | Link |
---|---|
US (1) | US2563491A (en) |
BE (1) | BE474847A (en) |
FR (1) | FR949410A (en) |
GB (1) | GB614761A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2645181A (en) * | 1950-01-04 | 1953-07-14 | Materials Blasting Company Inc | Blasting shell and firing mechanism therefor |
US2953448A (en) * | 1953-01-14 | 1960-09-20 | Ici Ltd | Compositions for safety heating elements |
GB737641A (en) * | 1953-11-06 | 1955-09-28 | Ici Ltd | Improved blasting device |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR15512E (en) * | 1911-03-25 | 1912-07-25 | Peuble Et Durif Soc | Cartridge for electric rifle |
US1950038A (en) * | 1932-02-24 | 1934-03-06 | Scott Alexander Crnickshank | Explosive |
BE404344A (en) * | 1933-07-24 | |||
GB424785A (en) * | 1933-08-30 | 1935-02-28 | Albert Greville White | Improvements in or relating to blasting explosive cartridges or borehole charges |
BE406598A (en) * | 1933-12-15 | |||
GB461647A (en) * | 1935-08-21 | 1937-02-22 | James Taylor | Improvements in or relating to blasting charges |
GB544252A (en) * | 1940-07-01 | 1942-04-03 | Walter Anderson Caldwell | Improvements in or relating to the manufacture of non-detonating fuzes for blasting and similar purposes |
-
0
- US US2563491D patent/US2563491A/en not_active Expired - Lifetime
- BE BE474847D patent/BE474847A/xx unknown
-
1946
- 1946-07-26 GB GB22299/46A patent/GB614761A/en not_active Expired
-
1947
- 1947-07-16 FR FR949410D patent/FR949410A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR949410A (en) | 1949-08-30 |
BE474847A (en) | |
US2563491A (en) | 1951-08-07 |
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