GB419939A - Improved means for releasing or collapsing mine chocks and the like - Google Patents
Improved means for releasing or collapsing mine chocks and the likeInfo
- Publication number
- GB419939A GB419939A GB1178733A GB1178733A GB419939A GB 419939 A GB419939 A GB 419939A GB 1178733 A GB1178733 A GB 1178733A GB 1178733 A GB1178733 A GB 1178733A GB 419939 A GB419939 A GB 419939A
- Authority
- GB
- United Kingdom
- Prior art keywords
- body member
- chock
- members
- levers
- pivoted
- 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)
- Soil Working Implements (AREA)
Abstract
419,939. Mine chocks. KAY, P., 1, Quality Row, Ryhope, near Sunderland. April 22, 1933, No. 11787. [Class 20 (ii).] A releasable chock for use in mines comprises a U-shaped body member 1 with sloping ends 2, pivoted chock supporting members 7, and disengageable locking means for retaining these supporting members in load-bearing positions. The members 7 have curved faces to contact with the base of the body member whereby their pivots are relieved of strain and they are stiffened by internal gusset plates 7<a>. The locking means consists of two levers 8 and 9 pivoted at 5 to the body member and provided with interfitting ends 8<a> and 9<a> for locking, one of the levers having a trigger extension to receive blows for unlocking. The body member is provided with projections such as 12 for positioning coacting wooden chock members 14. Specifications 342,046, 356,284, and 383,340 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1178733A GB419939A (en) | 1933-04-22 | 1933-04-22 | Improved means for releasing or collapsing mine chocks and the like |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1178733A GB419939A (en) | 1933-04-22 | 1933-04-22 | Improved means for releasing or collapsing mine chocks and the like |
Publications (1)
Publication Number | Publication Date |
---|---|
GB419939A true GB419939A (en) | 1934-11-22 |
Family
ID=9992688
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1178733A Expired GB419939A (en) | 1933-04-22 | 1933-04-22 | Improved means for releasing or collapsing mine chocks and the like |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB419939A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2723100A (en) * | 1951-04-13 | 1955-11-08 | Muschamp Norman James | Releasable supports for roofs in underground mines |
-
1933
- 1933-04-22 GB GB1178733A patent/GB419939A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2723100A (en) * | 1951-04-13 | 1955-11-08 | Muschamp Norman James | Releasable supports for roofs in underground mines |
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