BE426045A - - Google Patents
Info
- Publication number
- BE426045A BE426045A BE426045DA BE426045A BE 426045 A BE426045 A BE 426045A BE 426045D A BE426045D A BE 426045DA BE 426045 A BE426045 A BE 426045A
- 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
- H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
- H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2203755X | 1937-01-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE426045A true BE426045A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Family
ID=7989901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE426045D BE426045A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1937-01-30 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2203755A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
| BE (1) | BE426045A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2579469A (en) * | 1939-03-24 | 1951-12-25 | Int Standard Electric Corp | Revertive calling party line system |
| DE760807C (de) * | 1941-02-08 | 1954-05-24 | Siemens & Halske A G | Schaltungsanordnung zur Induktivwahl in Fernmeldeanlagen, insbesondere Fernsprechanlagen |
| GB598552A (en) * | 1945-01-30 | 1948-02-20 | Bertram Morton Hadfield | Improvements in or relating to electrical signalling systems |
-
0
- BE BE426045D patent/BE426045A/xx unknown
-
1938
- 1938-01-28 US US187505A patent/US2203755A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2203755A (en) | 1940-06-11 |