CH562539A5 - - Google Patents
Info
- Publication number
- CH562539A5 CH562539A5 CH206273A CH206273A CH562539A5 CH 562539 A5 CH562539 A5 CH 562539A5 CH 206273 A CH206273 A CH 206273A CH 206273 A CH206273 A CH 206273A CH 562539 A5 CH562539 A5 CH 562539A5
- Authority
- CH
- Switzerland
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
- H04M19/026—Arrangements for interrupting the ringing current
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7205290A FR2172537A5 (enExample) | 1972-02-17 | 1972-02-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH562539A5 true CH562539A5 (enExample) | 1975-05-30 |
Family
ID=9093631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH206273A CH562539A5 (enExample) | 1972-02-17 | 1973-02-14 |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US3835258A (enExample) |
| AR (1) | AR195702A1 (enExample) |
| BR (1) | BR7301219D0 (enExample) |
| CA (1) | CA971689A (enExample) |
| CH (1) | CH562539A5 (enExample) |
| DE (1) | DE2307317A1 (enExample) |
| ES (1) | ES411687A1 (enExample) |
| FR (1) | FR2172537A5 (enExample) |
| GB (1) | GB1386523A (enExample) |
| IT (1) | IT979129B (enExample) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE7512060L (sv) * | 1974-11-07 | 1976-05-10 | Western Electric Co | Anordning for att i en telekommunikationsanleggning patrycka och detektera ringsignaler over en anropad linje |
| US4447673A (en) * | 1977-12-27 | 1984-05-08 | Stromberg-Carlson Corporation | Ring trip apparatus for a line circuit connected to DCO switch |
| ES244069Y (es) * | 1979-06-21 | 1980-04-01 | Circuito detector de corriente. | |
| US4447675A (en) * | 1982-10-29 | 1984-05-08 | Bell Telephone Laboratories, Incorporated | Ring-trip detector |
| EP0165363B1 (fr) * | 1984-06-20 | 1988-08-31 | International Business Machines Corporation | Circuit detecteur de variations de courant |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3312787A (en) * | 1963-10-17 | 1967-04-04 | Stromberg Carlson Corp | Signaling system |
| DE1288626B (de) * | 1966-05-28 | 1969-02-06 | Nippon Electric Co | Automatische Geraeteabschaltanordnung fuer einen Fernempfaenger |
| BE756517A (fr) * | 1969-09-23 | 1971-03-01 | Ericsson Telefon Ab L M | Interrupteur pour signaux d'appel de centraux telephoniques automatiques |
| US3641552A (en) * | 1970-02-18 | 1972-02-08 | Int Assemblix Corp | Centrally located access alarm system |
-
1972
- 1972-02-17 FR FR7205290A patent/FR2172537A5/fr not_active Expired
-
1973
- 1973-02-01 US US00328706A patent/US3835258A/en not_active Expired - Lifetime
- 1973-02-14 DE DE19732307317 patent/DE2307317A1/de active Pending
- 1973-02-14 CH CH206273A patent/CH562539A5/xx not_active IP Right Cessation
- 1973-02-15 IT IT20416/73A patent/IT979129B/it active
- 1973-02-15 GB GB743273A patent/GB1386523A/en not_active Expired
- 1973-02-15 AR AR246635A patent/AR195702A1/es active
- 1973-02-16 CA CA163,860A patent/CA971689A/en not_active Expired
- 1973-02-16 ES ES411687A patent/ES411687A1/es not_active Expired
- 1973-02-19 BR BR731219A patent/BR7301219D0/pt unknown
Also Published As
| Publication number | Publication date |
|---|---|
| IT979129B (it) | 1974-09-30 |
| BR7301219D0 (pt) | 1974-02-19 |
| GB1386523A (en) | 1975-03-05 |
| AR195702A1 (es) | 1973-10-31 |
| DE2307317A1 (de) | 1973-08-30 |
| FR2172537A5 (enExample) | 1973-09-28 |
| US3835258A (en) | 1974-09-10 |
| ES411687A1 (es) | 1976-01-01 |
| CA971689A (en) | 1975-07-22 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased | ||
| PL | Patent ceased |