BE509657A - - Google Patents
Info
- Publication number
- BE509657A BE509657A BE509657DA BE509657A BE 509657 A BE509657 A BE 509657A BE 509657D A BE509657D A BE 509657DA BE 509657 A BE509657 A BE 509657A
- 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)
- Interface Circuits In Exchanges (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IE312453X | 1951-03-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE509657A true BE509657A (US06252093-20010626-C00008.png) |
Family
ID=11042216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE509657D BE509657A (US06252093-20010626-C00008.png) | 1951-03-03 |
Country Status (7)
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB956356A (en) * | 1960-07-21 | 1964-04-22 | Standard Telephones Cables Ltd | Improvements in or relating to signalling methods between subscriber's sets and exchage |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1550658A (en) * | 1920-12-31 | 1925-08-25 | American Telephone & Telegraph | Ringing circuits for multiplex signaling |
| US1864082A (en) * | 1931-09-25 | 1932-06-21 | Bell Telephone Labor Inc | Telephone exchange system |
| US2041114A (en) * | 1934-11-14 | 1936-05-19 | Louis F B Carini | Electrical discharge tube circuits |
| DE658606C (de) * | 1935-05-01 | 1938-04-13 | Siemens & Halske Akt Ges | Schaltungsanlage fuer Fernsprechanlagen mit Waehlerbetrieb |
| US2191913A (en) * | 1939-03-03 | 1940-02-27 | Bell Telephone Labor Inc | Telephone system |
| US2303654A (en) * | 1940-07-12 | 1942-12-01 | Honeywell Regulator Co | Control apparatus |
| FR960967A (US06252093-20010626-C00008.png) * | 1945-02-06 | 1950-04-28 | ||
| BE486292A (US06252093-20010626-C00008.png) * | 1947-02-20 |
-
0
- NL NL7307805C patent/NL167851C/xx active
- BE BE509657D patent/BE509657A/xx unknown
-
1952
- 1952-01-04 GB GB345/52A patent/GB689379A/en not_active Expired
- 1952-02-27 US US273652A patent/US2686228A/en not_active Expired - Lifetime
- 1952-03-02 DE DEI5582A patent/DE965823C/de not_active Expired
- 1952-03-03 FR FR1058881D patent/FR1058881A/fr not_active Expired
- 1952-03-03 CH CH312453D patent/CH312453A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR1058881A (fr) | 1954-03-19 |
| DE965823C (de) | 1957-06-19 |
| NL167851C (nl) | |
| GB689379A (en) | 1953-03-25 |
| CH312453A (de) | 1955-12-31 |
| US2686228A (en) | 1954-08-10 |
