GB541395A - Improvements in or relating to wedge block supports particularly for use in coal andlike mines - Google Patents
Improvements in or relating to wedge block supports particularly for use in coal andlike minesInfo
- Publication number
- GB541395A GB541395A GB1389340A GB1389340A GB541395A GB 541395 A GB541395 A GB 541395A GB 1389340 A GB1389340 A GB 1389340A GB 1389340 A GB1389340 A GB 1389340A GB 541395 A GB541395 A GB 541395A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wedge
- projections
- grooves
- mines
- lower members
- 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
- 230000000717 retained effect Effects 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
- E21D15/02—Non-telescopic props
- E21D15/06—Non-telescopic props with parts joined by a lock, with or without slight axial adjustability
- E21D15/12—Non-telescopic props with parts joined by a lock, with or without slight axial adjustability with locking devices located near head or foot
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)
- Clamps And Clips (AREA)
Abstract
541,395. Wedge chocks for mines. HEWITT, T. H. Sept. 5, 1940, No. 13893. [Class 20 (ii) ] A wedge chock for use in mines either alone or with mine props comprises upper and lower members 1, 4 with parallel outer faces and inclined inner faces and a central wedge member 9, the upper and lower members being constrained by means of interfitting projections and grooves for vertical sliding movement only and the wedge serving to lock the members of the chock. In one form as shown in Fig. 2, the wedge is hollow and encloses interengaging projections 5 from the upper and lower members, these projections having inter-fitting lug and groove connection, 7 and 8, so that they can move only vertically with respect to each other. These projections are further provided with lugs 13 which engage inclined recesses in the hollow of the wedge whereby the parts are retained in assembled position. A link 16 acts as a stop to. prevent disengagement of the parts. In another form as shown in Fig. 10. the inter-engaging projections and grooves, 21 and 22 respectively, on the upper and lower members 18, 19 lie outside the intermediate wedge member 25 and lugs 24 on these members engage grooves in the side of the intermediate member whereby they are retained in assembled position. The grooves 22 may be closed at their outer ends. The chock may be attached to the end of a pit prop 31 by a pivot bolt 32 on one side and a locking pin 33 on the opposite side as shown in Fig. 15.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1389340A GB541395A (en) | 1940-09-05 | 1940-09-05 | Improvements in or relating to wedge block supports particularly for use in coal andlike mines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1389340A GB541395A (en) | 1940-09-05 | 1940-09-05 | Improvements in or relating to wedge block supports particularly for use in coal andlike mines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB541395A true GB541395A (en) | 1941-11-25 |
Family
ID=10031287
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1389340A Expired GB541395A (en) | 1940-09-05 | 1940-09-05 | Improvements in or relating to wedge block supports particularly for use in coal andlike mines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB541395A (en) |
-
1940
- 1940-09-05 GB GB1389340A patent/GB541395A/en not_active Expired
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