GB793628A - Improvements in or relating to releasable supporting chocks particularly for use in mines - Google Patents
Improvements in or relating to releasable supporting chocks particularly for use in minesInfo
- Publication number
- GB793628A GB793628A GB3230454A GB3230454A GB793628A GB 793628 A GB793628 A GB 793628A GB 3230454 A GB3230454 A GB 3230454A GB 3230454 A GB3230454 A GB 3230454A GB 793628 A GB793628 A GB 793628A
- Authority
- GB
- United Kingdom
- Prior art keywords
- latch
- head
- bell crank
- chock
- engaging
- 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
- 230000000284 resting effect Effects 0.000 abstract 1
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)
- Load-Engaging Elements For Cranes (AREA)
Abstract
793,628. Mine chocks. KENNINGS, Ltd., and HODGES, B. W. Oct. 5, 1955 [Nov. '8, 1954], No. 32304/54. Class 20(2) The load on a chock head 31 resting on an incline 4 on a base 3 moves the latch 11, which holds the head in operative position, to release position when the latch is released by a bell crank lever 16 which is released by a member 24. The latch has a T-head 12 engaging a face 32 on the chock head. The bell crank 16 and latch engage by faces 18 and the other arm 20 of the bell crank is engaged in an opening 26, Fig. 5, in one arm of a pivoted T-shaped member 24 which is pivoted to release the bell crank and chock by an operating bar engaging an arm 27 or a Sylvester engaging a loop 28 The base 3 is part of a framework 2 carrying another chock which is released by the same T-shaped member 24 In a modified form the latch 11 is replaced by a bell crank lever and the chuck head is guided by the ends of a cross pin engaging in slots on either side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3230454A GB793628A (en) | 1954-11-08 | 1954-11-08 | Improvements in or relating to releasable supporting chocks particularly for use in mines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3230454A GB793628A (en) | 1954-11-08 | 1954-11-08 | Improvements in or relating to releasable supporting chocks particularly for use in mines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB793628A true GB793628A (en) | 1958-04-23 |
Family
ID=10336524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3230454A Expired GB793628A (en) | 1954-11-08 | 1954-11-08 | Improvements in or relating to releasable supporting chocks particularly for use in mines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB793628A (en) |
-
1954
- 1954-11-08 GB GB3230454A patent/GB793628A/en not_active Expired
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