FR1257993A - Device for producing an acoustic signal, in particular a call signal - Google Patents
Device for producing an acoustic signal, in particular a call signalInfo
- Publication number
- FR1257993A FR1257993A FR827930A FR827930A FR1257993A FR 1257993 A FR1257993 A FR 1257993A FR 827930 A FR827930 A FR 827930A FR 827930 A FR827930 A FR 827930A FR 1257993 A FR1257993 A FR 1257993A
- Authority
- FR
- France
- Prior art keywords
- signal
- producing
- acoustic signal
- call signal
- call
- 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
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
- G08B3/1008—Personal calling arrangements or devices, i.e. paging systems
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR827930A FR1257993A (en) | 1960-05-20 | 1960-05-20 | Device for producing an acoustic signal, in particular a call signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR827930A FR1257993A (en) | 1960-05-20 | 1960-05-20 | Device for producing an acoustic signal, in particular a call signal |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1257993A true FR1257993A (en) | 1961-04-07 |
Family
ID=8731957
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR827930A Expired FR1257993A (en) | 1960-05-20 | 1960-05-20 | Device for producing an acoustic signal, in particular a call signal |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR1257993A (en) |
-
1960
- 1960-05-20 FR FR827930A patent/FR1257993A/en not_active Expired
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