DE547700C - Device for telephony in four-wire circuit - Google Patents
Device for telephony in four-wire circuitInfo
- Publication number
- DE547700C DE547700C DEF62566D DEF0062566D DE547700C DE 547700 C DE547700 C DE 547700C DE F62566 D DEF62566 D DE F62566D DE F0062566 D DEF0062566 D DE F0062566D DE 547700 C DE547700 C DE 547700C
- Authority
- DE
- Germany
- Prior art keywords
- wire circuit
- telephony
- coil groups
- circuit according
- wire
- 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
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Description
Einrichtung zum Fernsprechen in VierdrahtschaItung Im Hauptpatent ist eine Einrichtung zum Fernsprechen inVierdrahtschaltung beschrieben, bei der in einem Kabel mit Viererverseilung je zwei Doppelleitungen, von denen jeweils die eine gegenläufig zur andern für dasselbe Gespräch benutzt wird, einen Vierer bilden, der mit einer elektrostatischen Schutzhülle versehen ist.Device for telephony in four-wire circuit in the main patent a device for telephony in four-wire circuit is described in which in a four-stranded cable, two double lines each, of which the one is used opposite to the other for the same conversation, form a foursome, which is provided with an electrostatic protective cover.
Gemäß der Erfindung wird nicht nur im Kabel, sondern auch an den Verbindungsstellen und an den Zuführungen zu den Pupinspulen jeder Vierdrahtkreis statisch gegen die übrigen abgeschirmt; ferner wird vorgeschlagen, die zur Belastung eines jeden Vierdrahtkreises dienenden Spulen gegen die übrigen elektrostatisch und elektromagnetisch abzuschirmen. Die Abschirmung der Leitungsteile kann in bekannter Weise durch Schutzhüllen aus Stanniol, metal-Jisiertem Papier usw., die Abschirmung der Spulen durch Kästen aus ferromagnetischem Material erfolgen. Durch die Erfindung wird die Nebensprechfreiheit der Vierdrahtschaltung in beträchtlichem Maße erhöht und dadurch die im Hauptpatent beschriebene Einrichtung vervollkommnet.According to the invention, not only in the cable, but also at the connection points and at the leads to the Pupin coils each four-wire circuit statically against the remaining shielded; It is also proposed that the load on each four-wire circuit the coils serving to shield them electrostatically and electromagnetically from the rest. The shielding of the line parts can be made in a known manner by protective sheaths Tinfoil, metal-coated paper, etc., the coils are shielded by boxes ferromagnetic material. The invention makes crosstalk freedom the four-wire circuit increased to a considerable extent and thereby that in the main patent facility described perfected.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEF62566D DE547700C (en) | 1926-11-28 | 1926-11-28 | Device for telephony in four-wire circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEF62566D DE547700C (en) | 1926-11-28 | 1926-11-28 | Device for telephony in four-wire circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
DE547700C true DE547700C (en) | 1932-03-26 |
Family
ID=7109562
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEF62566D Expired DE547700C (en) | 1926-11-28 | 1926-11-28 | Device for telephony in four-wire circuit |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE547700C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE875674C (en) * | 1948-11-25 | 1953-05-04 | Normalzeit G M B H | Arrangement for four-wire operation in telephone systems |
-
1926
- 1926-11-28 DE DEF62566D patent/DE547700C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE875674C (en) * | 1948-11-25 | 1953-05-04 | Normalzeit G M B H | Arrangement for four-wire operation in telephone systems |
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