GB712963A - Improvements in mine roof support caps - Google Patents
Improvements in mine roof support capsInfo
- Publication number
- GB712963A GB712963A GB3066152A GB3066152A GB712963A GB 712963 A GB712963 A GB 712963A GB 3066152 A GB3066152 A GB 3066152A GB 3066152 A GB3066152 A GB 3066152A GB 712963 A GB712963 A GB 712963A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bar
- pawl
- hook
- mine roof
- extensions
- 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
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 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)
- Emergency Lowering Means (AREA)
- Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
Abstract
712,963. Couplings for mine roof support bars. AKT.-GES. FUR UNTERNEHMUNGEN DER EISENUND STAHLINDUSTRIE. Dec. 3, 1952 [Dec. 5, 1951], No. 30661/52. Class 20 (2) In connecting an advance mine roof support bar 1, Figs. 1, 2, to a propped bar 2, the bar 1 is swung up about its pivotal connection 6, 11 with the bar 2 whereupon a movable pawl 13 with a hooked end 18 on the bar 1 engages with a hook 7 on the bar 2 to hold the bar 1 in its raised position as shown in Fig. 1 prior to being finally clamped against the mine roof as shown in Fig. 2. The hook member 4 with the hook 7 carries trunnions 6 which are engaged by open jaws 11 on a forked member 8 having extensions 10 welded to both sides of the bar 1. The pawl 13 is supported in a slot 12 in the bar 1 between the extensions 10 and has a wide slot 14 adapted to receive a wedge 15 which enters through cut-away portions 16 in the extensions 10 and abuts at one side end faces 17 of the cut-away portions. On swinging up the bar 1, the end of the pawl 13 sides over the hook 7 until its hook 18 falls into position behind the hook 7. On driving in the wedge 15, the pawl 13 is moved longitudinally of the slot 12 and it together with the bar 1 swings upwardly into the roof supporting position. Instead of a wedge operating on the pawl, an eccentric, screw or bell-crank lever may be used and the pawl may be brought into engagement with the counter-pawl by lateral or upward movement under spring action.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1951A0014650 DE975231C (en) | 1951-12-05 | 1951-12-05 | Articulated cap connection |
Publications (1)
Publication Number | Publication Date |
---|---|
GB712963A true GB712963A (en) | 1954-08-04 |
Family
ID=6923259
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3066152A Expired GB712963A (en) | 1951-12-05 | 1952-12-03 | Improvements in mine roof support caps |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE975231C (en) |
FR (1) | FR1067366A (en) |
GB (1) | GB712963A (en) |
NL (2) | NL174344B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2915328A (en) * | 1957-07-08 | 1959-12-01 | Hugh Wood And Company Ltd | Bars for supporting the roof in mines and for like purposes |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE942322C (en) * | 1954-03-16 | 1956-05-03 | Ulrich Wichmann | Articulated connection of caps |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE481680A (en) * | ||||
BE475032A (en) * | 1946-08-28 | |||
DE803992C (en) * | 1949-07-03 | 1951-04-16 | Wilhelm Reppel | Cap made of juxtaposed links for mining, especially longwall mining |
DE801717C (en) * | 1949-07-12 | 1951-01-22 | Mannesmann Ag | Cap connector |
-
0
- NL NL88621D patent/NL88621C/xx active
- NL NLAANVRAGE7209868,A patent/NL174344B/en unknown
-
1951
- 1951-12-05 DE DE1951A0014650 patent/DE975231C/en not_active Expired
-
1952
- 1952-12-02 FR FR1067366D patent/FR1067366A/en not_active Expired
- 1952-12-03 GB GB3066152A patent/GB712963A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2915328A (en) * | 1957-07-08 | 1959-12-01 | Hugh Wood And Company Ltd | Bars for supporting the roof in mines and for like purposes |
Also Published As
Publication number | Publication date |
---|---|
FR1067366A (en) | 1954-06-15 |
NL88621C (en) | |
NL174344B (en) | |
DE975231C (en) | 1961-10-12 |
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