GB359185A - Improvements relating to pit props - Google Patents
Improvements relating to pit propsInfo
- Publication number
- GB359185A GB359185A GB2998430A GB2998430A GB359185A GB 359185 A GB359185 A GB 359185A GB 2998430 A GB2998430 A GB 2998430A GB 2998430 A GB2998430 A GB 2998430A GB 359185 A GB359185 A GB 359185A
- Authority
- GB
- United Kingdom
- Prior art keywords
- socket
- wedge
- class
- improvements relating
- projections
- 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 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
- E21D15/50—Component parts or details of props
- E21D15/52—Extensible units located above or below standard props
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)
- Telescopes (AREA)
Abstract
359,185. Mine props. SOPWITH, S. F., The House, and FOGGO, M. J., The Cottage, both in Chasetown, near Walsall. Oct. 7, 1930, No. 29984. [Class 20 (ii).] Mine props of the kind described in Specification 277,484, [Class 20 (ii), Buildings and structures, Miscellaneous accessories &c.], which comprise a lower member, an upper sliding socket member, and a cross wedge coacting with surfaces on the lower member and socket members for the purposes of adjustment, the cross wedge being provided with side projections k which normally prevent disengagement of the wedge from the socket, have gaps l provided in the lower portion of the aperture in the socket to allow the passage of the projections for complete withdrawal of the wedge. Hollow wedges are used for the purpose of lightening the parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2998430A GB359185A (en) | 1930-10-07 | 1930-10-07 | Improvements relating to pit props |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2998430A GB359185A (en) | 1930-10-07 | 1930-10-07 | Improvements relating to pit props |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB359185A true GB359185A (en) | 1931-10-22 |
Family
ID=10300376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2998430A Expired GB359185A (en) | 1930-10-07 | 1930-10-07 | Improvements relating to pit props |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB359185A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2730347A (en) * | 1952-10-31 | 1956-01-10 | Cincinnati Mine Machinery Co | Cutter bar construction and adjustment therefor |
-
1930
- 1930-10-07 GB GB2998430A patent/GB359185A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2730347A (en) * | 1952-10-31 | 1956-01-10 | Cincinnati Mine Machinery Co | Cutter bar construction and adjustment therefor |
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