BE467777A - - Google Patents
Info
- Publication number
- BE467777A BE467777A BE467777DA BE467777A BE 467777 A BE467777 A BE 467777A BE 467777D A BE467777D A BE 467777DA BE 467777 A BE467777 A BE 467777A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/14—Arrangements providing for calling or supervisory signals
-
- 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)
- Signal Processing (AREA)
- Telephonic Communication Services (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US579126A US2414440A (en) | 1945-02-21 | 1945-02-21 | Voice frequency ringer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE467777A true BE467777A (it) |
Family
ID=24315671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE467777D BE467777A (it) | 1945-02-21 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2414440A (it) |
| BE (1) | BE467777A (it) |
| ES (1) | ES172956A1 (it) |
| FR (1) | FR922528A (it) |
| GB (1) | GB608117A (it) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR960967A (it) * | 1945-02-06 | 1950-04-28 | ||
| US2751436A (en) * | 1952-03-27 | 1956-06-19 | Automatic Elect Lab | Carrier current telephone systems |
| DE1004860B (de) * | 1952-12-18 | 1957-03-21 | Roland Laraque | Brennkraftmaschine mit gegenlaeufigen Kolben |
| FR1098648A (fr) * | 1954-01-22 | 1955-08-16 | Lignes Telegraph Telephon | Dispositif de réception de signaux télégraphiques |
-
0
- BE BE467777D patent/BE467777A/xx unknown
-
1945
- 1945-02-21 US US579126A patent/US2414440A/en not_active Expired - Lifetime
-
1946
- 1946-02-15 GB GB4826/46A patent/GB608117A/en not_active Expired
- 1946-02-18 FR FR922528D patent/FR922528A/fr not_active Expired
- 1946-03-20 ES ES172956A patent/ES172956A1/es not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2414440A (en) | 1947-01-21 |
| ES172956A1 (es) | 1946-05-01 |
| GB608117A (en) | 1948-09-09 |
| FR922528A (fr) | 1947-06-11 |