FR882217A - Electric transmission systems - Google Patents
Electric transmission systemsInfo
- Publication number
- FR882217A FR882217A FR882217DA FR882217A FR 882217 A FR882217 A FR 882217A FR 882217D A FR882217D A FR 882217DA FR 882217 A FR882217 A FR 882217A
- Authority
- FR
- France
- Prior art keywords
- transmission systems
- electric transmission
- electric
- systems
- transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB954042A GB554786A (en) | 1942-07-09 | 1942-07-09 | Electrical signal transmission system |
Publications (1)
Publication Number | Publication Date |
---|---|
FR882217A true FR882217A (en) | 1943-05-21 |
Family
ID=9873964
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR882217D Expired FR882217A (en) | 1942-07-09 | 1942-05-20 | Electric transmission systems |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE446464A (en) |
CH (1) | CH233480A (en) |
FR (1) | FR882217A (en) |
GB (1) | GB554786A (en) |
-
1942
- 1942-05-20 FR FR882217D patent/FR882217A/en not_active Expired
- 1942-07-03 CH CH233480D patent/CH233480A/en unknown
- 1942-07-09 GB GB954042A patent/GB554786A/en not_active Expired
-
1947
- 1947-06-20 BE BE446464D patent/BE446464A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
CH233480A (en) | 1944-07-31 |
BE446464A (en) | 1948-04-17 |
GB554786A (en) | 1943-07-19 |
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