BE432170A - - Google Patents
Info
- Publication number
- BE432170A BE432170A BE432170DA BE432170A BE 432170 A BE432170 A BE 432170A BE 432170D A BE432170D A BE 432170DA BE 432170 A BE432170 A BE 432170A
- Authority
- BE
- Belgium
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)
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB167238A GB509827A (en) | 1938-01-18 | 1938-01-18 | Improvements in or relating to spring-driven impulse dials of the type used in telephone systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE432170A true BE432170A (en:Method) |
Family
ID=9726029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE432170D BE432170A (en:Method) | 1938-01-18 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE432170A (en:Method) |
| GB (1) | GB509827A (en:Method) |
-
0
- BE BE432170D patent/BE432170A/xx unknown
-
1938
- 1938-01-18 GB GB167238A patent/GB509827A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB509827A (en) | 1939-07-18 |