GB452487A - Improvements in tamping means for blasting cartridges - Google Patents
Improvements in tamping means for blasting cartridgesInfo
- Publication number
- GB452487A GB452487A GB5872/35A GB587235A GB452487A GB 452487 A GB452487 A GB 452487A GB 5872/35 A GB5872/35 A GB 5872/35A GB 587235 A GB587235 A GB 587235A GB 452487 A GB452487 A GB 452487A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- fluid
- tamping
- borehole
- plunger
- 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
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
- F42D1/22—Methods for holding or positioning for blasting cartridges or tamping cartridges
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Earth Drilling (AREA)
Abstract
452,487. Tamping blasting-cartridges. SAFETY MINING CO., 307, North Michigan Avenue, Chicago, U.S.A. Feb. 23, 1935, No. 5872. Convention date, Feb. 28, 1934. [Class 9(i)] Relates to the tamping of blasting-cartridges which are charged with a fluid under pressure while in the borehole, and consists mainly in the provision of means adapted to be expanded by the fluid pressure during the charging of the cartridge to engage the borehole to produce an effective tamping. As shown, the device comprises a number of rubber rings 32 adapted to be pressed up on cones 31 by rings 35 operated by a number of rods 75 by the head 40 of a plunger 18 subjected to the fluid pressure. The pressure fluid is supplied to the cartridge 4 by a pipe 42. When a certain pressure has been reached the fluid passes through a non- return valve 26 and by its pressure on the flange 22 of the plunger 18 drives this plunger inwards, and thereby the rings 32 are wedged up and expanded into firm gripping contact with the borehole.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US713338A US2083733A (en) | 1934-02-28 | 1934-02-28 | Anchoring means |
Publications (1)
Publication Number | Publication Date |
---|---|
GB452487A true GB452487A (en) | 1936-08-24 |
Family
ID=24865747
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5872/35A Expired GB452487A (en) | 1934-02-28 | 1935-02-23 | Improvements in tamping means for blasting cartridges |
Country Status (3)
Country | Link |
---|---|
US (1) | US2083733A (en) |
FR (1) | FR786577A (en) |
GB (1) | GB452487A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2428884A (en) * | 1942-04-17 | 1947-10-14 | Hercules Powder Co Ltd | Electric blasting cap |
DE1036789B (en) * | 1954-09-24 | 1958-08-21 | Ici Ltd | Gas pressure explosive device for coal u. Like. With gas outlet openings controlled by a sealing piston |
-
1934
- 1934-02-28 US US713338A patent/US2083733A/en not_active Expired - Lifetime
-
1935
- 1935-02-13 FR FR786577D patent/FR786577A/en not_active Expired
- 1935-02-23 GB GB5872/35A patent/GB452487A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2083733A (en) | 1937-06-15 |
FR786577A (en) | 1935-09-05 |
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