FR608667A - Improvements to shearers - Google Patents
Improvements to shearersInfo
- Publication number
- FR608667A FR608667A FR608667DA FR608667A FR 608667 A FR608667 A FR 608667A FR 608667D A FR608667D A FR 608667DA FR 608667 A FR608667 A FR 608667A
- Authority
- FR
- France
- Prior art keywords
- shearers
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
- E21C29/04—Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains
- E21C29/06—Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains anchored at one or both ends to the mine working face
- E21C29/10—Cable or chain co-operating with a winch or the like on the machine
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US608667XA | 1924-12-19 | 1924-12-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR608667A true FR608667A (en) | 1926-07-31 |
Family
ID=22032229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR608667D Expired FR608667A (en) | 1924-12-19 | 1925-04-09 | Improvements to shearers |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR608667A (en) |
-
1925
- 1925-04-09 FR FR608667D patent/FR608667A/en not_active Expired
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