GB670822A - Improvements in or relating to high tension electric fuseheads for blasting and like operations - Google Patents
Improvements in or relating to high tension electric fuseheads for blasting and like operationsInfo
- Publication number
- GB670822A GB670822A GB2922949A GB2922949A GB670822A GB 670822 A GB670822 A GB 670822A GB 2922949 A GB2922949 A GB 2922949A GB 2922949 A GB2922949 A GB 2922949A GB 670822 A GB670822 A GB 670822A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- parts
- composition
- nitrocellulose
- solution
- 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
Abstract
670,822. Electric blasting fuzes. RUBENSTEIN, L., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. Nov. 15, 1950. [Nov. 15, 1949] No. 29229/49. Class 9 (i). A high tension electric fuze for blasting operations has a matchhead composition between the polepieces comprising 45 per cent to 50 per cent lead dioxide, not less than 17 per cent zirconium powder, and 15 per cent to 35 per cent aluminium powder, all parts being by weight. These ingredients are bound together by an adhesive, e.g. nitrocellulose, and coated with a flashing composition, e.g. a potassium chlorate-charcoal composition and with waterproofing compositions. In an example 35 parts of paint-fine aluminium powder are mixed with 45 parts of lead dioxide. The mixture is moistened with 3 per cent industrial nitrocellulose solution in a mixture of amyl acetate and amyl alcohol and 20 parts of zirconium powder are then incorporated. Fuzehead blanks comprising two metal pole pieces separated by pressboard insulation are dipped in the composition. The coating is dried and the process repeated. The primed fuzeheads are then coated with a composition comprising 1 part charcoal to 5 parts potassium chlorate in a 7 per cent solution of the nitrocellulose. After drying coatings of 10 per cent collodion and a 15 per cent solution of nitrocellulose are applied. Two further examples are given.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2922949A GB670822A (en) | 1949-11-15 | 1949-11-15 | Improvements in or relating to high tension electric fuseheads for blasting and like operations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2922949A GB670822A (en) | 1949-11-15 | 1949-11-15 | Improvements in or relating to high tension electric fuseheads for blasting and like operations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB670822A true GB670822A (en) | 1952-04-23 |
Family
ID=10288184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2922949A Expired GB670822A (en) | 1949-11-15 | 1949-11-15 | Improvements in or relating to high tension electric fuseheads for blasting and like operations |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB670822A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE945495C (en) * | 1953-01-02 | 1956-07-12 | Dynamit Nobel Ag | Electric igniter |
| DE1243067B (en) * | 1965-11-13 | 1967-06-22 | Karlsruhe Augsburg Iweka | Percussion ignition set for low pressure ignition |
| DE1257650B (en) * | 1963-09-07 | 1967-12-28 | Dynamit Nobel Ag | Firedamp-proof delay set with a delay time in the millisecond range |
| CN115772056A (en) * | 2022-12-01 | 2023-03-10 | 天津宏泰华凯科技有限公司 | Priming powder for electronic detonator, preparation method and application |
-
1949
- 1949-11-15 GB GB2922949A patent/GB670822A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE945495C (en) * | 1953-01-02 | 1956-07-12 | Dynamit Nobel Ag | Electric igniter |
| DE1257650B (en) * | 1963-09-07 | 1967-12-28 | Dynamit Nobel Ag | Firedamp-proof delay set with a delay time in the millisecond range |
| DE1243067B (en) * | 1965-11-13 | 1967-06-22 | Karlsruhe Augsburg Iweka | Percussion ignition set for low pressure ignition |
| CN115772056A (en) * | 2022-12-01 | 2023-03-10 | 天津宏泰华凯科技有限公司 | Priming powder for electronic detonator, preparation method and application |
| CN115772056B (en) * | 2022-12-01 | 2024-02-02 | 天津宏泰华凯科技有限公司 | Primer for electronic detonator, preparation method and application |
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