FR51704E - - Google Patents
Info
- Publication number
- FR51704E FR51704E FR51704DA FR51704E FR 51704 E FR51704 E FR 51704E FR 51704D A FR51704D A FR 51704DA FR 51704 E FR51704 E FR 51704E
- 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
- B61L7/00—Remote control of local operating means for points, signals, or track-mounted scotch-blocks
- B61L7/06—Remote control of local operating means for points, signals, or track-mounted scotch-blocks using electrical transmission
- B61L7/08—Circuitry
- B61L7/083—Common line wire control using currents of different amplitudes, polarities, frequencies, or the like
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR51704E true FR51704E (xx) | 1943-04-15 |
Family
ID=1363292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR51704D Expired FR51704E (xx) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR51704E (xx) |
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0
- FR FR51704D patent/FR51704E/fr not_active Expired