GB799739A - Improvements in or relating to roof-bars for use in long wall mining - Google Patents
Improvements in or relating to roof-bars for use in long wall miningInfo
- Publication number
- GB799739A GB799739A GB23733/55A GB2373355A GB799739A GB 799739 A GB799739 A GB 799739A GB 23733/55 A GB23733/55 A GB 23733/55A GB 2373355 A GB2373355 A GB 2373355A GB 799739 A GB799739 A GB 799739A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pin
- bars
- slot
- tongue
- roof
- 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
- 230000004048 modification Effects 0.000 abstract 2
- 238000012986 modification Methods 0.000 abstract 2
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)
- Heat Sensitive Colour Forming Recording (AREA)
Abstract
799,739. Mine roof support bars. EGGEMANN, WW., and CAMPENHAUSEN, E. VON, '[trading as SCHWARZ KOMMGES., H.]. Aug. 17, 1955 [Aug. 19, 1954], No. 23733/55. Class 20(2) In mine roof support bars engaging end to end by a tongue 25 and a fork 16 connected by a pin 20 and locked by a wedge 29, the pin 20 engages a slot 31 extending longitudinally of the tongue 25. The wedge 29 engages slots 20 in the fork and one of two recesses in the end of the tongue. In a modification, the inner end of the slot 31 is enlarged to form recesses to accommodate the pin 20 and lock the bars against longitudinal movement. In another modification, . the pin is formed with flats which fit the slot 31 which has an enlarged inner end in which the pin can be turned so :that the flattened end is at right angles to the slot and locks the pin and bars in position.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE799739X | 1954-08-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB799739A true GB799739A (en) | 1958-08-13 |
Family
ID=6711673
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB23733/55A Expired GB799739A (en) | 1954-08-19 | 1955-08-17 | Improvements in or relating to roof-bars for use in long wall mining |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE540613A (en) |
FR (1) | FR1135845A (en) |
GB (1) | GB799739A (en) |
NL (1) | NL111909C (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE499766A (en) * | 1948-07-08 | |||
DE1218382B (en) * | 1958-03-18 | 1966-06-08 | Hermann Schwarz Kommanditgesel | Tensile connection for articulated caps in longwall mining |
US3043108A (en) * | 1958-07-16 | 1962-07-10 | Vanwersch Aloys | Mine roof bar arrangement |
-
0
- BE BE540613D patent/BE540613A/xx unknown
- NL NL111909D patent/NL111909C/xx active
-
1955
- 1955-08-16 FR FR1135845D patent/FR1135845A/en not_active Expired
- 1955-08-17 GB GB23733/55A patent/GB799739A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BE540613A (en) | |
NL111909C (en) | |
FR1135845A (en) | 1957-05-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1089226A (en) | Releasable fastener | |
GB799739A (en) | Improvements in or relating to roof-bars for use in long wall mining | |
GB1408825A (en) | Pipe supports | |
GB738819A (en) | Improvements in and relating to the fixing of roof-supporting bars in coal mining | |
GB777489A (en) | Improvements in locking devices | |
GB1221847A (en) | Ball joint | |
GB1159049A (en) | Improvements in or relating to Fastening Devices, particularly for Fastening Frames of Doors, Window and the like to Walls. | |
GB901222A (en) | Improvements in and relating to mine roof-bars | |
GB1042877A (en) | Improvements in or relating to coal-cutter picks | |
GB1121262A (en) | Improvements in shovel loaders | |
GB1133043A (en) | Improvements in and relating to locks | |
GB788871A (en) | Improvements in and relating to the locking of screws | |
GB946982A (en) | Twin handles for suitcases, bags or the like | |
GB1071493A (en) | Improvements in or relating to cutter pick securing | |
GB819699A (en) | Mine roof support bar | |
GB1004110A (en) | Self-advancing support structure for a mine gallery roof | |
SU91250A1 (en) | Unit for the mechanization of logging | |
GB798822A (en) | Improvements relating to roof-supporting structures at underground workfaces | |
GB1092277A (en) | Improvements in or relating to coal cutter picks | |
GB1335096A (en) | Transition couplings for rail vehicles | |
GB831565A (en) | Improvements in or relating to metallic extension bars used for roof supports in mines | |
GB924372A (en) | Improvements in or relating to roof support elements for mines | |
GB1275052A (en) | Improvements to foldable push-chairs | |
GB794008A (en) | Roof bar for mine roof support systems | |
GB900316A (en) | Improvements in or relating to means for coupling articulated roof bars for mines |