FR761927A - - Google Patents
Info
- Publication number
- FR761927A FR761927A FR761927DA FR761927A FR 761927 A FR761927 A FR 761927A FR 761927D A FR761927D A FR 761927DA FR 761927 A FR761927 A FR 761927A
- 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 |
|---|---|
| FR761927A true FR761927A (de) | 1934-03-29 |
Family
ID=1551106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR761927D Expired FR761927A (de) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR761927A (de) |
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0
- FR FR761927D patent/FR761927A/fr not_active Expired