FR3280E - Improvements to electrical switches that operate automatically at set intervals - Google Patents
Improvements to electrical switches that operate automatically at set intervalsInfo
- Publication number
- FR3280E FR3280E FR3280DA FR3280E FR 3280 E FR3280 E FR 3280E FR 3280D A FR3280D A FR 3280DA FR 3280 E FR3280 E FR 3280E
- Authority
- FR
- France
- Prior art keywords
- electrical switches
- set intervals
- operate automatically
- automatically
- operate
- Prior art date
- 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
- B61L29/00—Safety means for rail/road crossing traffic
- B61L29/24—Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning
- B61L29/28—Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning electrically operated
- B61L29/288—Wiring diagram of the signal control circuits
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR319109T | 1902-02-27 | ||
FR3280T | 1904-05-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR3280E true FR3280E (en) | 1904-10-05 |
Family
ID=1346311
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR3280D Expired FR3280E (en) | 1902-02-27 | 1904-05-25 | Improvements to electrical switches that operate automatically at set intervals |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR3280E (en) |
-
1904
- 1904-05-25 FR FR3280D patent/FR3280E/en not_active Expired
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