GB758308A - Improvements in and relating to collapsible props or chucks for mine roof supports and like purposes - Google Patents
Improvements in and relating to collapsible props or chucks for mine roof supports and like purposesInfo
- Publication number
- GB758308A GB758308A GB3236954A GB3236954A GB758308A GB 758308 A GB758308 A GB 758308A GB 3236954 A GB3236954 A GB 3236954A GB 3236954 A GB3236954 A GB 3236954A GB 758308 A GB758308 A GB 758308A
- Authority
- GB
- United Kingdom
- Prior art keywords
- face
- latch
- strut
- chucks
- props
- 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
- 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
- E21D15/60—Devices for withdrawing props or chocks
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)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
758,308. Chocks for supporting mine roofs. KAY, P. Dec. 6, 1954 [Nov. 9, 1954], No. 32369/54. Class 20(2). A chock of the kind having a vertical support 11 to which is pivoted a head 23 having an underhung swinging strut 1, has the end of the strut formed as a V, one face of which coacts with an inclined face 2 or a fixed secondary upright 6, whilst the other face coacts with an inclined face 7 on a member 8 which is pivoted at 9a to the member 6. The member 8 is retained in a position to support the strut 1, by a double armed latch 12a, whose arms are coupled by a bridle 13. The latch engages over projections 10 on the member 8, and is retained by projections 17 engaged by an arm 21 on a shaft 18 having cams 19a. Release of the chock is effected by rotating the shaft 18, as by an applied lever and chain, whereupon the arm 21 is disengaged from the latch, and the latter raised by the cams to disengage it from. the member 8. Specification 636,376 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3236954A GB758308A (en) | 1954-11-09 | 1954-11-09 | Improvements in and relating to collapsible props or chucks for mine roof supports and like purposes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3236954A GB758308A (en) | 1954-11-09 | 1954-11-09 | Improvements in and relating to collapsible props or chucks for mine roof supports and like purposes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB758308A true GB758308A (en) | 1956-10-03 |
Family
ID=10337541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3236954A Expired GB758308A (en) | 1954-11-09 | 1954-11-09 | Improvements in and relating to collapsible props or chucks for mine roof supports and like purposes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB758308A (en) |
-
1954
- 1954-11-09 GB GB3236954A patent/GB758308A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB798247A (en) | Safety lock for crane hook | |
| GB758308A (en) | Improvements in and relating to collapsible props or chucks for mine roof supports and like purposes | |
| GB1364979A (en) | Detachable connection between a prop head and a cap therefor | |
| GB823586A (en) | Improvements in or relating to mine roof supports | |
| GB909275A (en) | End to end connection for bars, especially mine roof bars | |
| GB574948A (en) | Improvements relating to the stabilising of bomb carriers upon aircraft | |
| GB730220A (en) | Improvements in hand trucks | |
| GB847292A (en) | Improvements relating to cotterpins | |
| GB723692A (en) | An improved chock release for use in mines and the like | |
| GB810036A (en) | Improvements in or relating to extensible or telescopic pit props or the like | |
| GB704296A (en) | Improvements in or relating to metal props for mines and the like | |
| CA515957A (en) | Mine roof bolt | |
| GB1217466A (en) | Improvements in or relating to devices for the extension of pit props | |
| GB564212A (en) | Improvements relating to pit props and the like | |
| GB662201A (en) | Improvements in locking arrangements for metal stanchions or pit props | |
| GB1008996A (en) | A device for setting to the roof an extension of a roof bar incorporated in a mine roof support | |
| GB814276A (en) | 3-sulphanilamido-5-methylisoxazole and a process for its preparation | |
| GB1484876A (en) | Automatic fish-striking device | |
| GB709240A (en) | Improvements relating to roof supporting structures, as used in mines | |
| CA592794A (en) | COPOLYMERIZATION OF AN ALIPHATIC CONJUGATE DIOLEFINE WITH AN .alpha.,.beta.-ETHYLENE DICARBOXYLIC ACID DERIVATIVE | |
| Uchida et al. | Draft Arrangement on the Longdraft Spinning Machine for long Stape | |
| GB1203733A (en) | PREPARATION OF delta< >-3-KETO STEROIDS | |
| GB1002038A (en) | Base plates for pit props | |
| GB762750A (en) | A wedge for use in connections for girders supporting mine roofs | |
| GB343303A (en) | Improved construction of pivot connection |