GB792039A - Arrangement in condenser discharge blasting apparatus - Google Patents
Arrangement in condenser discharge blasting apparatusInfo
- Publication number
- GB792039A GB792039A GB29478/56A GB2947856A GB792039A GB 792039 A GB792039 A GB 792039A GB 29478/56 A GB29478/56 A GB 29478/56A GB 2947856 A GB2947856 A GB 2947856A GB 792039 A GB792039 A GB 792039A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- firing circuit
- blasting
- circuit
- interrupted
- 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
- F42D1/045—Arrangements for electric ignition
- F42D1/05—Electric circuits for blasting
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Electromechanical Clocks (AREA)
Abstract
792,039. Blasting. NITROGLYCERIN AKTIEBOLAGET. Sept. 27, 1956 [Oct. 1, 1955], No 29478/56. Class 68(1) Apparatus of the type in which a capacitor 1 is adapted first to be charged by a source of current and then, on the manual operation of a switch 6, to give off its stored charge instantaneously through a firing circuit connected to the apparatus and comprising a plurality of electric blasting caps associated with blasting charges and in which a discharge circuit, which includes a discharge resistance 8. is in parallel with the firing circuit, and is normally closed in order to keep the capacitor free from residual charges but by the actuation of a second switch 7 can intentionally be interrupted whicle the apparatus is in use, is characterized in that the switch 7 is double acting and is also included in the firing circuit where it is connected in series with the switch 6 so that closure of the firing circuit is only possible when the discharge circuit is interrupted. The contact members of the switches 6, 7 are actuated against the action of return springs The source of current is a hand-driven generator 2 with or without a rectifier set.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE792039X | 1955-10-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB792039A true GB792039A (en) | 1958-03-19 |
Family
ID=68172048
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB29478/56A Expired GB792039A (en) | 1955-10-01 | 1956-09-27 | Arrangement in condenser discharge blasting apparatus |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR1158874A (en) |
GB (1) | GB792039A (en) |
-
1956
- 1956-09-21 FR FR1158874D patent/FR1158874A/en not_active Expired
- 1956-09-27 GB GB29478/56A patent/GB792039A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR1158874A (en) | 1958-06-20 |
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