FR765359A - Processes and apparatus for acoustic signaling and their various applications - Google Patents
Processes and apparatus for acoustic signaling and their various applicationsInfo
- Publication number
- FR765359A FR765359A FR765359DA FR765359A FR 765359 A FR765359 A FR 765359A FR 765359D A FR765359D A FR 765359DA FR 765359 A FR765359 A FR 765359A
- Authority
- FR
- France
- Prior art keywords
- processes
- various applications
- acoustic signaling
- signaling
- acoustic
- 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
- G08B1/00—Systems for signalling characterised solely by the form of transmission of the signal
- G08B1/08—Systems for signalling characterised solely by the form of transmission of the signal using electric transmission ; transformation of alarm signals to electrical signals from a different medium, e.g. transmission of an electric alarm signal upon detection of an audible alarm signal
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR765359T | 1933-12-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR765359A true FR765359A (en) | 1934-06-08 |
Family
ID=9182713
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR765359D Expired FR765359A (en) | 1933-12-11 | 1933-12-11 | Processes and apparatus for acoustic signaling and their various applications |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR765359A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE921618C (en) * | 1951-01-11 | 1954-12-23 | Physikalisch Tech Werkstaetten | Overhaul signal receiving system |
DE950441C (en) * | 1953-03-04 | 1956-10-11 | Dowidat Werke Willi Dowidat | Device for the transmission of acoustic signals for vehicles |
-
1933
- 1933-12-11 FR FR765359D patent/FR765359A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE921618C (en) * | 1951-01-11 | 1954-12-23 | Physikalisch Tech Werkstaetten | Overhaul signal receiving system |
DE950441C (en) * | 1953-03-04 | 1956-10-11 | Dowidat Werke Willi Dowidat | Device for the transmission of acoustic signals for vehicles |
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