NL80217C - - Google Patents
Info
- Publication number
- NL80217C NL80217C NL80217DA NL80217C NL 80217 C NL80217 C NL 80217C NL 80217D A NL80217D A NL 80217DA NL 80217 C NL80217 C NL 80217C
- Authority
- NL
- Netherlands
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)
- Amplifiers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM4081A DE903824C (de) | 1950-06-15 | 1950-06-15 | Elektrischer Signalempfaenger, insbesondere Tonfrequenzsignalempfaenger |
Publications (1)
Publication Number | Publication Date |
---|---|
NL80217C true NL80217C (xx) |
Family
ID=7292504
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL80217D NL80217C (xx) | 1950-06-15 |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE903824C (xx) |
NL (1) | NL80217C (xx) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1001709B (de) * | 1953-02-24 | 1957-01-31 | Int Standard Electric Corp | Tonfrequenzsignalempfaenger fuer zwei Frequenzen |
DE1002824B (de) * | 1954-07-08 | 1957-02-21 | Radio Electr Soc Fr | Schaltvorrichtung fuer drahtlose Verbindungen mit Impulsbetrieb |
DE1280995B (de) * | 1961-04-05 | 1968-10-24 | Siemens Ag | Zeichenempfaenger hoher Selektivitaet |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE711592C (de) * | 1933-06-24 | 1941-10-03 | Siemens & Halske Akt Ges | Signalempfaenger fuer Fernsprechanlagen |
GB485652A (en) * | 1936-10-20 | 1938-05-20 | Telephone Mfg Co Ltd | Improvements in and relating to telephone systems and the like |
GB495162A (en) * | 1938-02-22 | 1938-11-08 | Arthur Reginald Albert Rendall | Improvements in and relating to alternating current signalling systems |
FR963277A (xx) * | 1947-02-21 | 1950-07-05 |
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0
- NL NL80217D patent/NL80217C/xx active
-
1950
- 1950-06-15 DE DEM4081A patent/DE903824C/de not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE903824C (de) | 1954-02-11 |