GB319107A - Improvements in pit props for use in coal or other mines - Google Patents
Improvements in pit props for use in coal or other minesInfo
- Publication number
- GB319107A GB319107A GB2212128A GB2212128A GB319107A GB 319107 A GB319107 A GB 319107A GB 2212128 A GB2212128 A GB 2212128A GB 2212128 A GB2212128 A GB 2212128A GB 319107 A GB319107 A GB 319107A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tapered
- mines
- coal
- props
- lengths
- 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
- 239000003245 coal Substances 0.000 title 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)
Abstract
319,107. Cuthbertson, R. W. April 18, 1929. Mine props.-Tubular props A are tapered throughout the whole or a portion of their lengths and are slotted throughout their lengths or only for a short distance in the tapered portion. The tapered portion may comprise a separate part A<1> fixed by a, spigot and socket to the lower end of the non-tapered tubular portion A, the tapered portion only being slotted at a<1>. Apertured caps may be applied to the head and foot. Specifications 293,520 and 296,920 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2212128A GB319107A (en) | 1929-04-18 | 1929-04-18 | Improvements in pit props for use in coal or other mines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2212128A GB319107A (en) | 1929-04-18 | 1929-04-18 | Improvements in pit props for use in coal or other mines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB319107A true GB319107A (en) | 1929-09-19 |
Family
ID=10174233
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2212128A Expired GB319107A (en) | 1929-04-18 | 1929-04-18 | Improvements in pit props for use in coal or other mines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB319107A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4534531A (en) * | 1980-07-22 | 1985-08-13 | Brown Allan H G | Elongated prop for supporting a load |
-
1929
- 1929-04-18 GB GB2212128A patent/GB319107A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4534531A (en) * | 1980-07-22 | 1985-08-13 | Brown Allan H G | Elongated prop for supporting a load |
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