GB495492A - Improvements in or connected with roof-supporting means for use in mining, quarrying and like operations - Google Patents
Improvements in or connected with roof-supporting means for use in mining, quarrying and like operationsInfo
- Publication number
- GB495492A GB495492A GB1859337A GB1859337A GB495492A GB 495492 A GB495492 A GB 495492A GB 1859337 A GB1859337 A GB 1859337A GB 1859337 A GB1859337 A GB 1859337A GB 495492 A GB495492 A GB 495492A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cut
- screw
- wedge
- wedging
- inner end
- 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 abstract 2
- 101100008044 Caenorhabditis elegans cut-1 gene Proteins 0.000 abstract 1
- 101100008046 Caenorhabditis elegans cut-2 gene Proteins 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 238000003780 insertion Methods 0.000 abstract 1
- 230000000717 retained 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
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)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
495,492. Mine-roof supports. MAVOR & COULSON, Ltd., and MAVOR, J. B. July 5, 1937, No. 18593. [Class 20 (ii)] A beam B for use in mining, quarrying, and the like, by insertion into a cut or slot-way 2, e.g. in a coal-face A, Fig. 1, carries means whereby its inner end can be tightened against the upper and lower faces of the cut, retained in that position, and slackened for withdrawal of the beam. The roof cut 2, into which the beam B is inserted, extends further inwardly than a floor cut 1 as described in Specification 494,186. The inner end of the beam shown in Fig. 2 is provided with a shoe 4 connected thereto by toggles 5 which are operated by a rack-and-lever device 7, 8, through a rod 6, to wedge the beam in position. The shoe may, alternatively, be connected with the beam by a pair of parallel links so as to be controlled by a lever-controlled push rod. The beam shown in Fig. 3 is provided with a fixed wedge 10 which is in dovetail-sliding engagement with a wedge 11 ; when the beam is inserted into the cut, wedging occurs after the wedge 11 reaches the back of the cut. An alternative wedging device comprises a plate 14, Fig. 5, which is pivoted to the beam and has two arcuate wedges 15 corresponding to two arcuate wedges 13 on the underside of the beam This beam is inserted into the cut in an askew position and is thereafter swung, either by direct action or ratchet device, into mid-position to tighten it in the cut. The underside of the plate 14 is roughened to hinder it from turning when the beam is swung. The beam shown in Fig. 7 has a screw-jack arranged at its inner end comprising a plate 16, a screw 17, a worm-wheel 18 forming a nut on the screw 17, a worm 19, and an outwardly-extending rod 20. The wedging mechanism is also stated to comprise a combination of two or more devices of toggle, wedge, screw, cam, or lever character. The Provisional Specification describes also wedging means of screw-jack type adapted to operate upper and lower hinged jaws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1859337A GB495492A (en) | 1937-07-05 | 1937-07-05 | Improvements in or connected with roof-supporting means for use in mining, quarrying and like operations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1859337A GB495492A (en) | 1937-07-05 | 1937-07-05 | Improvements in or connected with roof-supporting means for use in mining, quarrying and like operations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB495492A true GB495492A (en) | 1938-11-15 |
Family
ID=10115104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1859337A Expired GB495492A (en) | 1937-07-05 | 1937-07-05 | Improvements in or connected with roof-supporting means for use in mining, quarrying and like operations |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB495492A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2716025A (en) * | 1951-07-17 | 1955-08-23 | Paul V Malloy | Method and mining apparatus with movable roof supports |
-
1937
- 1937-07-05 GB GB1859337A patent/GB495492A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2716025A (en) * | 1951-07-17 | 1955-08-23 | Paul V Malloy | Method and mining apparatus with movable roof supports |
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