GB712236A - Improvements in or relating to chain cutter jibs used in mining - Google Patents
Improvements in or relating to chain cutter jibs used in miningInfo
- Publication number
- GB712236A GB712236A GB751851A GB751851A GB712236A GB 712236 A GB712236 A GB 712236A GB 751851 A GB751851 A GB 751851A GB 751851 A GB751851 A GB 751851A GB 712236 A GB712236 A GB 712236A
- Authority
- GB
- United Kingdom
- Prior art keywords
- jib
- vertical part
- remaining portion
- adjustment means
- chain
- 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
- 238000006073 displacement reaction Methods 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/22—Machines slitting solely by one or more cutter chains moving unidirectionally along jibs
- E21C25/28—Chains or chain guides
- E21C25/30—Chain guides
- E21C25/32—Chain guides specially adapted for curved jibs
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
712,236. Endless-chain excavating-machines MUSCHAMP, N. J., and COWLISHAW, F. March 25, 1952 [March 31, 1951] No. 7518/51. Class 68(1) In a chain cutter jib consisting of a horizontal part and a downward or upstanding vertical part two or more sections of said jib are connected together for relative pivotal movement in order that the altitude of the free end of the vertical part may be varied. In one embodiment the free end portion 12, 13 of the jib is hingedly connected to the remaining portion of the vertical part of the jib, so as to be capable of pivotal displacement to shorten the effective length of the vertical part on removal of the structure retaining said end portion in line with the remaining portion of the vertical part of the jib. The end part 12, 13 is connected by a pivot 16 to the sliding block 14 of a screw-operated adjustment means mounted in the remaining portion of the vertical part of the jib. The adjustment means permits of a limited variation of the length of the vertical part of the jib to tension the chain. In a second embodiment the free end portion 22, 23 of the jib is slidably positioned in the remaining portion of the vertical part of the jib structure and is connected by pivoted links 24 to the sliding block of the adjustment means 21 positioned in the horizontal part of the jib.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB751851A GB712236A (en) | 1951-03-31 | 1951-03-31 | Improvements in or relating to chain cutter jibs used in mining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB751851A GB712236A (en) | 1951-03-31 | 1951-03-31 | Improvements in or relating to chain cutter jibs used in mining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB712236A true GB712236A (en) | 1954-07-21 |
Family
ID=9834660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB751851A Expired GB712236A (en) | 1951-03-31 | 1951-03-31 | Improvements in or relating to chain cutter jibs used in mining |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB712236A (en) |
-
1951
- 1951-03-31 GB GB751851A patent/GB712236A/en not_active Expired
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