FR587447A - - Google Patents
Info
- Publication number
- FR587447A FR587447A FR587447DA FR587447A FR 587447 A FR587447 A FR 587447A FR 587447D A FR587447D A FR 587447DA FR 587447 A FR587447 A FR 587447A
- 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
- B61L5/20—Audible signals, e.g. detonator audible signalling
- B61L5/22—Devices for initiating the release of detonators in a certain position of a signal
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR587447A true FR587447A (de) | 1925-04-17 |
Family
ID=1539925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR587447D Expired FR587447A (de) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR587447A (de) |
-
0
- FR FR587447D patent/FR587447A/fr not_active Expired