NL226489A - - Google Patents
Info
- Publication number
- NL226489A NL226489A NL226489DA NL226489A NL 226489 A NL226489 A NL 226489A NL 226489D A NL226489D A NL 226489DA NL 226489 A NL226489 A NL 226489A
- Authority
- NL
- Netherlands
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
- H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
- Springs (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE839528X | 1957-04-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL226489A true NL226489A (en:Method) |
Family
ID=20354171
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL226489D NL226489A (en:Method) | 1957-04-17 | ||
| NL101043D NL101043C (en:Method) | 1957-04-17 |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL101043D NL101043C (en:Method) | 1957-04-17 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2964592A (en:Method) |
| DE (1) | DE1048294B (en:Method) |
| FR (1) | FR1194614A (en:Method) |
| GB (1) | GB839528A (en:Method) |
| NL (2) | NL101043C (en:Method) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB522807A (en) * | 1938-12-17 | 1940-06-27 | Gen Electric Co Ltd | Improvements in impulse senders for telephone systems |
| US2469974A (en) * | 1947-02-04 | 1949-05-10 | Western Electric Co | Telephone calling dial |
| US2543080A (en) * | 1947-08-14 | 1951-02-27 | Standard Telephones Cables Ltd | Telephone dial type transmitter with adjustable main spring |
| US2716160A (en) * | 1953-12-30 | 1955-08-23 | Bell Telephone Labor Inc | Brake for telephone calling dials |
-
0
- NL NL226489D patent/NL226489A/xx unknown
- NL NL101043D patent/NL101043C/xx active
-
1958
- 1958-04-11 FR FR1194614D patent/FR1194614A/fr not_active Expired
- 1958-04-14 GB GB11794/58A patent/GB839528A/en not_active Expired
- 1958-04-14 DE DET14998A patent/DE1048294B/de active Pending
- 1958-04-16 US US728961A patent/US2964592A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2964592A (en) | 1960-12-13 |
| GB839528A (en) | 1960-06-29 |
| DE1048294B (de) | 1959-01-08 |
| NL101043C (en:Method) | |
| FR1194614A (fr) | 1959-11-10 |