FR545314A - Improvements to vibrating call devices in telephony - Google Patents
Improvements to vibrating call devices in telephonyInfo
- Publication number
- FR545314A FR545314A FR545314DA FR545314A FR 545314 A FR545314 A FR 545314A FR 545314D A FR545314D A FR 545314DA FR 545314 A FR545314 A FR 545314A
- Authority
- FR
- France
- Prior art keywords
- telephony
- call devices
- vibrating call
- vibrating
- devices
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR545314T | 1920-03-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR545314A true FR545314A (en) | 1922-10-10 |
Family
ID=8932883
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR545314D Expired FR545314A (en) | 1920-03-26 | 1920-03-26 | Improvements to vibrating call devices in telephony |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR545314A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE741158C (en) * | 1937-01-30 | 1943-11-05 | Lorenz C Ag | Call inductor with non-displaceable drive axis for telephone systems |
-
1920
- 1920-03-26 FR FR545314D patent/FR545314A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE741158C (en) * | 1937-01-30 | 1943-11-05 | Lorenz C Ag | Call inductor with non-displaceable drive axis for telephone systems |
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