GB775754A - Improvements in and relating to support bars for mining and the like - Google Patents
Improvements in and relating to support bars for mining and the likeInfo
- Publication number
- GB775754A GB775754A GB32130/52A GB3213052A GB775754A GB 775754 A GB775754 A GB 775754A GB 32130/52 A GB32130/52 A GB 32130/52A GB 3213052 A GB3213052 A GB 3213052A GB 775754 A GB775754 A GB 775754A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bar
- wedge
- teeth
- ges
- akt
- 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
- 238000005065 mining Methods 0.000 title 1
- 230000001154 acute effect Effects 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
- E21D17/02—Cantilever extension or similar protecting devices
- E21D17/08—Cap joints for obtaining a coal-face free of pit-props
- E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
775,754. Roof-supporting bars in mines. GUTEHOFFNUNGSHUTTE STERKRADE AKT.-GES., [formerly GUTEHOFFNUNGSHUTTE OBERHAUSEN AKT.-GES.] Dec. 18, 1952 [Jan. 16, 1952], No. 32130/52. Class 20(2) In order to provide large range of angular movement of an advance mine roof bar 2 pivoted on a propped bar 1 using a single horizontal transverse wedge 4 passing through and engaging a slot 9 in the bar 2 the end of the bar 1 is formed as a toothed segment 5 and teeth 11 on the wedge 4 are engaged selectively higher or lower in the segment 5 according to the angular position required for the bar 2. The teeth 11 are inclined lengthwise with respect to the upper bearing edge of the wedge 4 in such a way that the bar 2 is tilted upwardly as the wedge is driven in. The wedge 4 is perpendicular to the longitudinal axis of the bar 2 but it may be arranged to extend at an acute angle to the bar axis to provide larger bearing surfaces for the teeth 5, 11.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE775754X | 1952-01-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB775754A true GB775754A (en) | 1957-05-29 |
Family
ID=6686367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB32130/52A Expired GB775754A (en) | 1952-01-16 | 1952-12-18 | Improvements in and relating to support bars for mining and the like |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE516921A (en) |
FR (1) | FR1069856A (en) |
GB (1) | GB775754A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3163011A (en) * | 1960-11-14 | 1964-12-29 | Karl M Groetschel | Connection for lagging irons |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE535250A (en) * | 1954-01-29 |
-
0
- BE BE516921D patent/BE516921A/xx unknown
-
1952
- 1952-12-18 GB GB32130/52A patent/GB775754A/en not_active Expired
-
1953
- 1953-01-13 FR FR1069856D patent/FR1069856A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3163011A (en) * | 1960-11-14 | 1964-12-29 | Karl M Groetschel | Connection for lagging irons |
Also Published As
Publication number | Publication date |
---|---|
BE516921A (en) | |
FR1069856A (en) | 1954-07-13 |
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