FR668856A - - Google Patents
Info
- Publication number
- FR668856A FR668856A FR668856DA FR668856A FR 668856 A FR668856 A FR 668856A FR 668856D A FR668856D A FR 668856DA FR 668856 A FR668856 A FR 668856A
- Authority
- FR
- France
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L21/00—Station blocking between signal boxes in one yard
- B61L21/04—Electrical locking and release of the route; Electrical repeat locks
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR668856A true FR668856A (en) | 1929-11-21 |
Family
ID=1543434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR668856D Expired FR668856A (en) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR668856A (en) |
-
0
- FR FR668856D patent/FR668856A/fr not_active Expired