FR620716A - - Google Patents
Info
- Publication number
- FR620716A FR620716A FR620716DA FR620716A FR 620716 A FR620716 A FR 620716A FR 620716D A FR620716D A FR 620716DA FR 620716 A FR620716 A FR 620716A
- 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
- B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
- B61L5/12—Visible signals
- B61L5/18—Light signals; Mechanisms associated therewith, e.g. blinders
- B61L5/1809—Daylight signals
- B61L5/1836—Daylight signals using light sources of different colours and separate optical systems
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR620716A true FR620716A (ko) | 1927-04-28 |
Family
ID=1541161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR620716D Expired FR620716A (ko) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR620716A (ko) |
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0
- FR FR620716D patent/FR620716A/fr not_active Expired