FR478531A - Perfectionnements apportés à la télégraphie - Google Patents
Perfectionnements apportés à la télégraphieInfo
- Publication number
- FR478531A FR478531A FR478531DA FR478531A FR 478531 A FR478531 A FR 478531A FR 478531D A FR478531D A FR 478531DA FR 478531 A FR478531 A FR 478531A
- Authority
- FR
- France
- Prior art keywords
- telegraphy
- 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
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
- G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
- G08B5/24—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane
- G08B5/30—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane with rotating or oscillating members, e.g. vanes
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR478531T | 1915-04-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR478531A true FR478531A (fr) | 1915-12-17 |
Family
ID=1516044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR478531D Expired FR478531A (fr) | 1915-04-27 | 1915-04-27 | Perfectionnements apportés à la télégraphie |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR478531A (fr) |
-
1915
- 1915-04-27 FR FR478531D patent/FR478531A/fr not_active Expired
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