FR630651A - - Google Patents
Info
- Publication number
- FR630651A FR630651A FR630651DA FR630651A FR 630651 A FR630651 A FR 630651A FR 630651D A FR630651D A FR 630651DA FR 630651 A FR630651 A FR 630651A
- 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
- B61L29/00—Safety means for rail/road crossing traffic
- B61L29/08—Operation of gates; Combined operation of gates and signals
- B61L29/18—Operation by approaching rail vehicle or train
- B61L29/22—Operation by approaching rail vehicle or train electrically
- B61L29/222—Operation by approaching rail vehicle or train electrically using conductor circuits with separate contacts or conductors
- B61L29/224—Operation by approaching rail vehicle or train electrically using conductor circuits with separate contacts or conductors using rail contacts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR630651A true FR630651A (xx) | 1927-12-07 |
Family
ID=1541475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR630651D Expired FR630651A (xx) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR630651A (xx) |
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0
- FR FR630651D patent/FR630651A/fr not_active Expired