GB877995A - Improvements in or relating to pit props - Google Patents
Improvements in or relating to pit propsInfo
- Publication number
- GB877995A GB877995A GB30783/59A GB3078359A GB877995A GB 877995 A GB877995 A GB 877995A GB 30783/59 A GB30783/59 A GB 30783/59A GB 3078359 A GB3078359 A GB 3078359A GB 877995 A GB877995 A GB 877995A
- Authority
- GB
- United Kingdom
- Prior art keywords
- props
- lehner
- energizes
- sept
- displacement
- 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
- 238000006073 displacement reaction Methods 0.000 abstract 2
- 239000002131 composite material Substances 0.000 abstract 1
- 230000011664 signaling Effects 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/12—Control, e.g. using remote control
- E21D23/14—Effecting automatic sequential movement of supports, e.g. one behind the other
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/12—Control, e.g. using remote control
- E21D23/14—Effecting automatic sequential movement of supports, e.g. one behind the other
- E21D23/146—Transmission of signals and commands by cable
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Toys (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
877,995. Electric selective signalling systems. LEHNER, C. L., [trading as FERNSPIECHUND SIGNALBAU LEHNER & CO. KOMM.- GES.], and HOESCH BERGBAUTECHNIK G.m.b.H. Sept. 9, 1959 [Sept. 20, 1958], No. 30783/59. Class 40 (1). [Also in Group X] In an arrangement for remotely controlling the displacement of composite frames of pit props (see Group X), the frame selection is governed by switch RW at a remote point which energizes one of a series of differently tuned transmitters FS1-FS3. The transmitter signal is applied to line a, b and energizes a similarly tuned receiver, e.g. FE, forming one of a series of selective receivers, one of which is allocated to each frame. The receiver output prepares a number of devices SVI-SVIII, controlling the displacement of the props, for operation by polarized signals applied via switch PSW and lines LI-LIII.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE877995X | 1958-09-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB877995A true GB877995A (en) | 1961-09-20 |
Family
ID=6818325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30783/59A Expired GB877995A (en) | 1958-09-20 | 1959-09-09 | Improvements in or relating to pit props |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB877995A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1175123B (en) * | 1962-03-24 | 1964-07-30 | Charbonnages De France | Remote alarm triggering circuit |
| US3228199A (en) * | 1962-05-30 | 1966-01-11 | Dowty Mining Equipment Ltd | Mining apparatus |
| US3243964A (en) * | 1963-04-15 | 1966-04-05 | Dowty Technical Dev Ltd | Mining apparatus |
| US3643445A (en) * | 1967-06-14 | 1972-02-22 | Bergwerksverband Gmbh | Hydraulic casing systems in mine workings |
-
1959
- 1959-09-09 GB GB30783/59A patent/GB877995A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1175123B (en) * | 1962-03-24 | 1964-07-30 | Charbonnages De France | Remote alarm triggering circuit |
| US3228199A (en) * | 1962-05-30 | 1966-01-11 | Dowty Mining Equipment Ltd | Mining apparatus |
| US3243964A (en) * | 1963-04-15 | 1966-04-05 | Dowty Technical Dev Ltd | Mining apparatus |
| US3643445A (en) * | 1967-06-14 | 1972-02-22 | Bergwerksverband Gmbh | Hydraulic casing systems in mine workings |
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