GB676583A - Improvements in or relating to pit props - Google Patents
Improvements in or relating to pit propsInfo
- Publication number
- GB676583A GB676583A GB18686/50A GB1868650A GB676583A GB 676583 A GB676583 A GB 676583A GB 18686/50 A GB18686/50 A GB 18686/50A GB 1868650 A GB1868650 A GB 1868650A GB 676583 A GB676583 A GB 676583A
- Authority
- GB
- United Kingdom
- Prior art keywords
- head plate
- webs
- roof
- prop
- bracket
- 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 abstract 2
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)
- Arc Welding In General (AREA)
Abstract
676,583. Pit props. DIRECTIE VAN DE STAATSMIJNEN IN LIMBURG. July 26, 1950 [July 29, 1949], No. 18686/50. Class 20(ii). The head plate 1 of a pit prop 4 supports a roof girder 13 by means of a bracket 11, in which the girder 13 is longitudinally movable and which bracket can be detached from the head plate while the head plate is clamped against the mine roof. The girder 13 is forced by wedges 14 against the roof. The bracket 11 is attached to the webs 5 by a pin 12. The head plate 1 comprises symmetrically arranged pairs of webs 5 at right-angles to one another. In supporting the roof at the coal face a distance piece 8 is pivoted by a pin 9 between a pair of the webs 5 and a further head is fixed by two pins to the distance piece and swung against the roof where it is supported by inserting a second pin 10 thus leaving a prop-free coal face for mechanical cutting. The second head plate is later supported by a prop when the pins 10 are removed to allow articulation. There is a universal joint 3 between the head plate and the prop 4. Single webs may replace the pairs of webs 5 and the ends of the distance pieces be bifurcated to engage them. Specification 676,582 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL676583X | 1949-07-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB676583A true GB676583A (en) | 1952-07-30 |
Family
ID=19802302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18686/50A Expired GB676583A (en) | 1949-07-29 | 1950-07-26 | Improvements in or relating to pit props |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB676583A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5292098A (en) * | 1988-06-07 | 1994-03-08 | Thos. Storey (Engineers) Limited | Support work props |
-
1950
- 1950-07-26 GB GB18686/50A patent/GB676583A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5292098A (en) * | 1988-06-07 | 1994-03-08 | Thos. Storey (Engineers) Limited | Support work props |
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