FR742328A - - Google Patents
Info
- Publication number
- FR742328A FR742328A FR742328DA FR742328A FR 742328 A FR742328 A FR 742328A FR 742328D A FR742328D A FR 742328DA FR 742328 A FR742328 A FR 742328A
- 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 |
|---|---|
| FR742328A true FR742328A (xx) | 1933-03-04 |
Family
ID=1546740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR742328D Expired FR742328A (xx) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR742328A (xx) |
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0
- FR FR742328D patent/FR742328A/fr not_active Expired