BE450536A - - Google Patents
Info
- Publication number
- BE450536A BE450536A BE450536DA BE450536A BE 450536 A BE450536 A BE 450536A BE 450536D A BE450536D A BE 450536DA BE 450536 A BE450536 A BE 450536A
- 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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE893502X | 1942-04-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE450536A true BE450536A (en:Method) |
Family
ID=6846781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE450536D BE450536A (en:Method) | 1942-04-18 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE450536A (en:Method) |
| FR (1) | FR893502A (en:Method) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE954519C (de) * | 1951-12-13 | 1956-12-20 | Standard Elek K Ag | Schaltungsanordnung zum Empfang von Ruf- und Wahlzeichen |
| DE969686C (de) * | 1952-05-09 | 1958-07-03 | Felten & Guilleaume Gmbh | Roehrenverstaerkerstufe zum gleichzeitigen Empfang und zur gemeinsamen Verstaerkung eines Frequenzbandes und einer ausserhalb desselben liegenden Signalfrequenz |
-
0
- BE BE450536D patent/BE450536A/xx unknown
-
1943
- 1943-04-13 FR FR893502D patent/FR893502A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR893502A (fr) | 1944-07-30 |