NL252052A - - Google Patents
Info
- Publication number
- NL252052A NL252052A NL252052DA NL252052A NL 252052 A NL252052 A NL 252052A NL 252052D A NL252052D A NL 252052DA NL 252052 A NL252052 A NL 252052A
- Authority
- NL
- Netherlands
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
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Mobile Radio Communication Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1823659A GB925514A (en) | 1959-05-28 | 1959-05-28 | Improvements relating to telephone system substation circuits and to tone current generating oscillations suitable for use in such circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL252052A true NL252052A (US07582779-20090901-C00044.png) |
Family
ID=10108997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL252052D NL252052A (US07582779-20090901-C00044.png) | 1959-05-28 |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1142637B (US07582779-20090901-C00044.png) |
| GB (1) | GB925514A (US07582779-20090901-C00044.png) |
| NL (1) | NL252052A (US07582779-20090901-C00044.png) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1059606A (en) * | 1964-08-25 | 1967-02-22 | Sits Soc It Telecom Siemens | A ringer |
| CN113483882B (zh) * | 2021-06-29 | 2023-03-14 | 重庆长安新能源汽车科技有限公司 | 一种电控发声装置 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE563265A (US07582779-20090901-C00044.png) * | 1956-06-22 |
-
0
- NL NL252052D patent/NL252052A/xx unknown
-
1959
- 1959-05-28 GB GB1823659A patent/GB925514A/en not_active Expired
-
1960
- 1960-05-27 DE DEA34743A patent/DE1142637B/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| GB925514A (en) | 1963-05-08 |
| DE1142637B (de) | 1963-01-24 |
