BE405429A - - Google Patents
Info
- Publication number
- BE405429A BE405429A BE405429DA BE405429A BE 405429 A BE405429 A BE 405429A BE 405429D A BE405429D A BE 405429DA BE 405429 A BE405429 A BE 405429A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
- H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Feeding And Controlling Fuel (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3589733A GB430502A (en) | 1933-12-20 | 1933-12-20 | Improvements in or relating to electric signalling systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE405429A true BE405429A (en) |
Family
ID=10382754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE405429D BE405429A (en) | 1933-12-20 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE405429A (en) |
| DE (1) | DE667311C (en) |
| FR (1) | FR786537A (en) |
| GB (1) | GB430502A (en) |
-
0
- BE BE405429D patent/BE405429A/xx unknown
-
1933
- 1933-12-20 GB GB3589733A patent/GB430502A/en not_active Expired
-
1934
- 1934-12-14 FR FR786537D patent/FR786537A/en not_active Expired
- 1934-12-21 DE DEI51268D patent/DE667311C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR786537A (en) | 1935-09-05 |
| GB430502A (en) | 1935-06-20 |
| DE667311C (en) | 1938-11-10 |