FR684628A - - Google Patents
Info
- Publication number
- FR684628A FR684628A FR684628DA FR684628A FR 684628 A FR684628 A FR 684628A FR 684628D A FR684628D A FR 684628DA FR 684628 A FR684628 A FR 684628A
- 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
- B61L23/00—Control, warning, or like safety means along the route or between vehicles or vehicle trains
- B61L23/08—Control, warning, or like safety means along the route or between vehicles or vehicle trains for controlling traffic in one direction only
- B61L23/14—Control, warning, or like safety means along the route or between vehicles or vehicle trains for controlling traffic in one direction only automatically operated
- B61L23/16—Track circuits specially adapted for section blocking
- B61L23/166—Track circuits specially adapted for section blocking using alternating current
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR684628A true FR684628A (xx) | 1930-07-17 |
Family
ID=1543864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR684628D Expired FR684628A (xx) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR684628A (xx) |
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0
- FR FR684628D patent/FR684628A/fr not_active Expired