GB301634A - An improved pit prop for mining and other purposes - Google Patents
An improved pit prop for mining and other purposesInfo
- Publication number
- GB301634A GB301634A GB3088027A GB3088027A GB301634A GB 301634 A GB301634 A GB 301634A GB 3088027 A GB3088027 A GB 3088027A GB 3088027 A GB3088027 A GB 3088027A GB 301634 A GB301634 A GB 301634A
- Authority
- GB
- United Kingdom
- Prior art keywords
- prop
- lower member
- mining
- purposes
- escape
- 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
- 239000000463 material Substances 0.000 abstract 3
- 238000005266 casting Methods 0.000 abstract 1
- 239000002699 waste material Substances 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
- E21D15/14—Telescopic props
- E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
- E21D15/18—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with one part resting on a supporting medium, e.g. rubber, sand, bitumen, lead, located in the other part, with or without expulsion or displacement of the medium upon excessive pressure
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)
- Crushing And Grinding (AREA)
- Finger-Pressure Massage (AREA)
Abstract
301,634. Bullough, E. Nov. 17, 1927. Mine props.-Telescopic pit props are formed of tubular parts, the upper 1 having a piston 6 at its lower end to slide in the lower member 2 and to rest normally on removable waste material 7 in the lower member. A guiding collar 8 is secured to the upper end of the lower member and castings 3, 4 are also secured to the ends of the lower and upper members, respectively. The piston is provided with a conical opening covered by a plate 10 formed in segments or having openings 11 for the escape of the material during settling of the prop, and openings may be provided in the tube 2 or in the foot-rest 3 also to allow of escape of the material. To provide for fine adjustment of the prop, a wire raker 17 leads frrm the opening 15 into the material, whereby small amounts of debris can be extracted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3088027A GB301634A (en) | 1927-11-17 | 1927-11-17 | An improved pit prop for mining and other purposes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3088027A GB301634A (en) | 1927-11-17 | 1927-11-17 | An improved pit prop for mining and other purposes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB301634A true GB301634A (en) | 1928-12-06 |
Family
ID=10314557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3088027A Expired GB301634A (en) | 1927-11-17 | 1927-11-17 | An improved pit prop for mining and other purposes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB301634A (en) |
-
1927
- 1927-11-17 GB GB3088027A patent/GB301634A/en not_active Expired
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