BE643985A - - Google Patents
Info
- Publication number
- BE643985A BE643985A BE643985DA BE643985A BE 643985 A BE643985 A BE 643985A BE 643985D A BE643985D A BE 643985DA BE 643985 A BE643985 A BE 643985A
- Authority
- BE
- Belgium
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21C29/14—Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains by haulage cable or chain pulling the machine along the working face
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)
- Fluid-Pressure Circuits (AREA)
- Control Of Position Or Direction (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL289204 | 1963-02-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE643985A true BE643985A (zh) | 1964-08-18 |
Family
ID=19754431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE643985D BE643985A (zh) | 1963-02-19 | 1964-02-18 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3293521A (zh) |
| BE (1) | BE643985A (zh) |
| GB (1) | GB990457A (zh) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1163261A (en) * | 1966-01-11 | 1969-09-04 | Coal Industry Patents Ltd | Remote Control of Mining Machines |
| US3436598A (en) * | 1967-07-17 | 1969-04-01 | John L Guerrisi | Control system safety relay |
| CA921153A (en) * | 1969-02-21 | 1973-02-13 | Mori Haruki | Shift controlling device for shifted materials |
| GB1310228A (en) * | 1969-10-16 | 1973-03-14 | Gullick Dobson Ltd | Method of mining and an apparatus for the carrying out of said method |
| US3826535A (en) * | 1973-02-12 | 1974-07-30 | Taiheiyo Coal Mining Co Ltd | Coal planer automatic reversing device |
| US3825809A (en) * | 1973-07-23 | 1974-07-23 | Vemco Products | Garage door power operator having partial open capability |
| US3962615A (en) * | 1974-03-20 | 1976-06-08 | Spangler Searle T | Multiple mode variable speed motor control circuit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2071176A (en) * | 1935-03-11 | 1937-02-16 | Gen Electric | Machine tool control arrangement |
| US2726358A (en) * | 1954-06-25 | 1955-12-06 | George E Barnhart | Portable electric motor power unit |
| US2922053A (en) * | 1957-09-10 | 1960-01-19 | British Iron Steel Research | Control systems |
| US2913651A (en) * | 1957-09-27 | 1959-11-17 | Westinghouse Electric Corp | Control system for a reversible motor |
| US3129369A (en) * | 1960-07-05 | 1964-04-14 | Arthur K Littwin | Automatic motor reversing at limit fo travel by variable transformer means |
| US3213342A (en) * | 1962-05-23 | 1965-10-19 | Robert L Littwin | Automatic motor reversal controlled by variable transformer means |
-
1964
- 1964-02-18 US US346385A patent/US3293521A/en not_active Expired - Lifetime
- 1964-02-18 BE BE643985D patent/BE643985A/xx unknown
- 1964-02-19 GB GB6972/64A patent/GB990457A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3293521A (en) | 1966-12-20 |
| GB990457A (en) | 1965-04-28 |