GB528493A - Improvements in and relating to chock releases for supporting mine roofs and the like - Google Patents
Improvements in and relating to chock releases for supporting mine roofs and the likeInfo
- Publication number
- GB528493A GB528493A GB1378039A GB1378039A GB528493A GB 528493 A GB528493 A GB 528493A GB 1378039 A GB1378039 A GB 1378039A GB 1378039 A GB1378039 A GB 1378039A GB 528493 A GB528493 A GB 528493A
- Authority
- GB
- United Kingdom
- Prior art keywords
- end members
- main member
- chock
- releases
- relating
- 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
-
- 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
- E21D15/60—Devices for withdrawing props or chocks
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)
Abstract
528,493. Mine chocks. TAYLOR, E. May 9, 1939, No. 13780. [Class 20 (ii)] A chock release for mines comprises a channel shaped main member 1, and inverted channel shaped end members 2, the edges of which 2a<SP>1</SP> are inclined laterally and rest upon similarly inclined edges 1a<SP>1</SP> of the main member. Lateral movement of the end members for collapse is resisted by lever 4 having wedge surfaces 4c coacting with corresponding projections 7, the lines of thrust, on the end members passing through the axes 5 of the levers. The end members are attached to the main member by chains 8 or by loops 10 on the end members encircling transverse rods 9 secured to the main member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1378039A GB528493A (en) | 1939-05-09 | 1939-05-09 | Improvements in and relating to chock releases for supporting mine roofs and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1378039A GB528493A (en) | 1939-05-09 | 1939-05-09 | Improvements in and relating to chock releases for supporting mine roofs and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB528493A true GB528493A (en) | 1940-10-30 |
Family
ID=10029226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1378039A Expired GB528493A (en) | 1939-05-09 | 1939-05-09 | Improvements in and relating to chock releases for supporting mine roofs and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB528493A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2729945A (en) * | 1949-03-09 | 1956-01-10 | Gerlach Karl | Mine filling frame structure comprising props and pivotally connected girders |
| US4540147A (en) * | 1983-09-23 | 1985-09-10 | Lincourt William R | Jack stand attachment |
-
1939
- 1939-05-09 GB GB1378039A patent/GB528493A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2729945A (en) * | 1949-03-09 | 1956-01-10 | Gerlach Karl | Mine filling frame structure comprising props and pivotally connected girders |
| US4540147A (en) * | 1983-09-23 | 1985-09-10 | Lincourt William R | Jack stand attachment |
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