DK138146C - - Google Patents
Info
- Publication number
- DK138146C DK138146C DK114574A DK114574A DK138146C DK 138146 C DK138146 C DK 138146C DK 114574 A DK114574 A DK 114574A DK 114574 A DK114574 A DK 114574A DK 138146 C DK138146 C DK 138146C
- Authority
- DK
- Denmark
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations
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 |
|---|---|---|---|
| SE7303043A SE363948B (fi) | 1973-03-05 | 1973-03-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DK138146B DK138146B (da) | 1978-07-17 |
| DK138146C true DK138146C (fi) | 1978-12-18 |
Family
ID=20316803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK114574AA DK138146B (da) | 1973-03-05 | 1974-03-04 | Strømforsyningskredsløb til oscillator til telefonapparater. |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US3916114A (fi) |
| CA (1) | CA993581A (fi) |
| CH (1) | CH581931A5 (fi) |
| DK (1) | DK138146B (fi) |
| FI (1) | FI56293C (fi) |
| FR (1) | FR2220941B1 (fi) |
| GB (1) | GB1447726A (fi) |
| IT (1) | IT1007412B (fi) |
| NL (1) | NL7402380A (fi) |
| NO (1) | NO132411C (fi) |
| SE (1) | SE363948B (fi) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4323792A (en) * | 1978-06-28 | 1982-04-06 | Bergmann Guenther | Two terminal circuitry for voltage limitation |
| JPS601790B2 (ja) * | 1979-09-14 | 1985-01-17 | 岩崎通信機株式会社 | 押し釦ダイヤル回路 |
| US4286120A (en) * | 1979-10-15 | 1981-08-25 | Gte Automatic Electric Labs Inc. | Current regulated pulse dialer circuit |
| US4536614A (en) * | 1982-12-13 | 1985-08-20 | Gte Communication Systems Corporation | Supervision and dial pulse detection circuit for a telephone subscriber line |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3035122A (en) * | 1958-09-30 | 1962-05-15 | Gen Dynamics Corp | Constant current line circuitt for loop telephone lines |
| FR2087469A5 (fi) * | 1970-05-20 | 1971-12-31 | Ericsson Telefon Ab L M | |
| CA930488A (en) * | 1971-08-27 | 1973-07-17 | C. J. Cowpland Michael | Power supply |
-
1973
- 1973-03-05 SE SE7303043A patent/SE363948B/xx unknown
-
1974
- 1974-02-21 FI FI511/74A patent/FI56293C/fi active
- 1974-02-21 NL NL7402380A patent/NL7402380A/xx not_active Application Discontinuation
- 1974-02-21 US US444419A patent/US3916114A/en not_active Expired - Lifetime
- 1974-02-27 FR FR7406708A patent/FR2220941B1/fr not_active Expired
- 1974-03-01 CA CA193,861A patent/CA993581A/en not_active Expired
- 1974-03-04 CH CH298974A patent/CH581931A5/xx not_active IP Right Cessation
- 1974-03-04 NO NO740746A patent/NO132411C/no unknown
- 1974-03-04 DK DK114574AA patent/DK138146B/da unknown
- 1974-03-05 GB GB991074A patent/GB1447726A/en not_active Expired
- 1974-04-08 IT IT20560/74A patent/IT1007412B/it active
Also Published As
| Publication number | Publication date |
|---|---|
| FR2220941B1 (fi) | 1977-09-23 |
| DK138146B (da) | 1978-07-17 |
| DE2408688B2 (de) | 1976-09-23 |
| IT1007412B (it) | 1976-10-30 |
| US3916114A (en) | 1975-10-28 |
| AU6618074A (en) | 1975-09-04 |
| NL7402380A (fi) | 1974-09-09 |
| DE2408688A1 (de) | 1974-09-26 |
| FI56293C (fi) | 1979-12-10 |
| NO132411B (fi) | 1975-07-28 |
| CH581931A5 (fi) | 1976-11-15 |
| FI56293B (fi) | 1979-08-31 |
| FR2220941A1 (fi) | 1974-10-04 |
| CA993581A (en) | 1976-07-20 |
| SE363948B (fi) | 1974-02-04 |
| GB1447726A (en) | 1976-08-25 |
| NO132411C (fi) | 1975-11-05 |