GB296290A - Improved tubular pit prop or strut - Google Patents
Improved tubular pit prop or strutInfo
- Publication number
- GB296290A GB296290A GB12879/28A GB1287928A GB296290A GB 296290 A GB296290 A GB 296290A GB 12879/28 A GB12879/28 A GB 12879/28A GB 1287928 A GB1287928 A GB 1287928A GB 296290 A GB296290 A GB 296290A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- prop
- girder
- strut
- slot
- 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
- 239000002184 metal Substances 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/54—Details of the ends of props
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Earth Drilling (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Metal Extraction Processes (AREA)
Abstract
296,290. Cuthbertson, R. W. Feb. 8, 1928. Divided on 293,520. Mine props.- Relates to pit - props such as are described in Specification 140,952, formed of openended metal tubing having a longitudinal slot. According to the invention, the slot extends not more than half way up the tube from the bottom or near the bottom. Fig. 1 shows a prop E in which a slot E<1> extending nearly half way up the tube from the bottom is graduated to show the depth to which the prop when in use. has sunk in the ground. To reduce the diameter of the bottom opening in the tube, an apertured shoe F, shown separately in Fig. 3, may be fitted. A cap similar to the part F may also be fitted on the top end of the prop if it is desired to increase the external diameter when the tube engages between the flanges of a channel girder. When the tubular prop is to be used to support a T-girder, the upper end of the tube is slotted to receive the flange of the girder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB12879/28A GB296290A (en) | 1927-05-12 | 1928-02-08 | Improved tubular pit prop or strut |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB12712/27A GB293520A (en) | 1927-05-12 | 1927-05-12 | Improvements in devices for shoring or supporting the roofs of mines |
| GB12879/28A GB296290A (en) | 1927-05-12 | 1928-02-08 | Improved tubular pit prop or strut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB296290A true GB296290A (en) | 1928-08-30 |
Family
ID=10012807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12879/28A Expired GB296290A (en) | 1927-05-12 | 1928-02-08 | Improved tubular pit prop or strut |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB296290A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1131624B (en) * | 1956-02-01 | 1962-06-20 | Wilhelm Hammer | Base plate for expansion segments in mining operations |
-
1928
- 1928-02-08 GB GB12879/28A patent/GB296290A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1131624B (en) * | 1956-02-01 | 1962-06-20 | Wilhelm Hammer | Base plate for expansion segments in mining operations |
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