GB736478A - Improvements in or relating to mechanical mining apparatus - Google Patents
Improvements in or relating to mechanical mining apparatusInfo
- Publication number
- GB736478A GB736478A GB28822/53A GB2882253A GB736478A GB 736478 A GB736478 A GB 736478A GB 28822/53 A GB28822/53 A GB 28822/53A GB 2882253 A GB2882253 A GB 2882253A GB 736478 A GB736478 A GB 736478A
- Authority
- GB
- United Kingdom
- Prior art keywords
- prop
- bar
- unit
- pawl
- thrust
- 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
- 239000003245 coal Substances 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/08—Shifting conveyors or other transport devices from one location at the working face to another
- E21F13/086—Armoured conveyors shifting devices
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
736,478. Pit-props. STAMICARBON N.V. Oct. 19, 1953 [Oct. 23, 1952], No. 28822/53. Class 20 (2). [Also in Groups XXI and XXX] The working thrust and advance of a coalmoving machine or conveyer 1 in coal mines is obtained against a prop 21 through a bar 19 and a compressed air unit 4 which advances the machine or conveyer by thrust against a pawl 22 mounted on the prop, the pawl allowing the bar to be advanced for a further thrust when the piston of the unit 4 has reached the end of its stroke. When the prop has reached the end of the bar 19 the pawl 22 is reversed to allow the unit 4 to push the bar 19 back through the base 20 of the prop and move the prop back towards the unit 1 in a series of steps, the prop being pivotally mounted in an oblique position by a spring 25 for this purpose.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL736478X | 1952-10-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB736478A true GB736478A (en) | 1955-09-07 |
Family
ID=19820416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28822/53A Expired GB736478A (en) | 1952-10-23 | 1953-10-19 | Improvements in or relating to mechanical mining apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB736478A (en) |
-
1953
- 1953-10-19 GB GB28822/53A patent/GB736478A/en not_active Expired
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