DE126002C - - Google Patents
Info
- Publication number
- DE126002C DE126002C DENDAT126002D DE126002DA DE126002C DE 126002 C DE126002 C DE 126002C DE NDAT126002 D DENDAT126002 D DE NDAT126002D DE 126002D A DE126002D A DE 126002DA DE 126002 C DE126002 C DE 126002C
- Authority
- DE
- Germany
- Prior art keywords
- microphone
- induction
- telephone
- primary winding
- branch
- 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.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/738—Interface circuits for coupling substations to external telephone lines
- H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Devices For Supply Of Signal Current (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
Die vorliegende Erfindung betrifft eine Fernsprechschaltung mit Centralmikrophonbatterie, wobei zur Ueberleitung des Mikrophonstromes lediglich die zur Uebertragung der Telephonströme angewendete Doppel- oder Einfachleitung benutzt wird. Um hierbei die Schwankungen des Mikrophonstromes zu localisiren und ungeschwächt in der Primärwicklung des Uebertragers zur Wirkung kommen zu lassen, ist gemäfs vorliegender Erfindung in einem zum Telephonkreis gelegten Nebenschlufs eine Drosselspule von hoher Selbstinduction in Hintereinanderschaltung mit dem Mikrophon angeordnet, zu welchem ein die Mikrophonstromschwankungen ermöglichender Nebenschlufs gelegt ist, der vorteilhaft die Primärspule enthalten kann.The present invention relates to a telephone circuit with central microphone battery, whereby for the transfer of the microphone stream only the double or Single line is used. In order to reduce the fluctuations in the microphone current Localizing and allowing them to take effect without being weakened in the primary winding of the transformer is according to the present invention in a bypass connected to the telephone circuit, a choke coil of high self-induction in series connection with the microphone, to which a microphone current fluctuations allow Secondary loop is placed, which can advantageously contain the primary coil.
Zwei der Erfindung entsprechende Schaltungen einer Fernsprechanlage für Doppel- und Einfachleitung sind auf der beiliegenden Zeichnung im Durchsprechzustand zur Darstellung gebracht.Two of the invention corresponding circuits of a telephone system for double and Single lines are in the talk-through state on the accompanying drawing for illustration brought.
Bei der in Fig. 1 dargestellten Schaltung ist die auf dem Amt α befindliche Mikrophonbatterie b durch die Drosselspulen c unter Vermittelung des Sprechumschalters zwischen die zu den Theilnehmerstationen I und II geführten Doppelleitungen geschaltet. Auf den Theilnehmerstationen befindet sich in dieser Leitung das Telephon mit der secundären Wicklung der Uebertragerspule in Hintereinanderschaltung, während das Mikrophon d und die Primärspule e, parallel zu einander liegend, in eine parallel zum Telephonstromkreis der Theilnehmerstation geschaltete Abzweigung eingeschlossen ist.In the circuit shown in Fig. 1, the microphone battery b located on the office α is switched between the double lines leading to the subscriber stations I and II through the choke coils c through the intermediary of the speech switch. On the subscriber stations the telephone with the secondary winding of the transmitter coil is connected in series, while the microphone d and the primary coil e, lying parallel to each other, are enclosed in a branch connected parallel to the telephone circuit of the subscriber station.
Um zu bewirken, dafs die beim Sprechen entstehenden Widerstandsanderungen des Mikrophons lediglich auf die zu diesem parallel liegende Primärwicklung e der Uebertragerspule wirksam werden, dagegen auf die Theilnehmerleitung ohne Einflufs bleiben, ist in Hintereinanderschaltung mit diesem aus Mikrophon und Primärwicklung bestehenden Combinationswiderstand eine hohe Selbstinduction f von beliebig hohem Ohm'schen Widerstand in die Abzweigleitung eingeschaltet. Diese hohe Selbstinduction verhindert gleichzeitig das Uebertreten der Telephonströme in den Mikrophonstromkreis, so dafs die Uebertragung des Gesprächs ohne jegliche störende Beeinflussung vor sich geht. Der Primärspule kann vortheilhaft ein Condensator vorgeschaltet werden, um die Selbstinduction der ersteren aufzuheben.In order to ensure that the changes in resistance of the microphone that arise when speaking are only effective on the primary winding e of the transmitter coil, which is parallel to it, but remain without influence on the subscriber line, a high self-induction f of is required in series with this combination resistance consisting of microphone and primary winding Any high ohmic resistance switched into the branch line. This high self-induction at the same time prevents the transmission of the telephone currents into the microphone circuit, so that the transmission of the conversation takes place without any disturbing influence. A condenser can advantageously be connected upstream of the primary coil in order to cancel the self-induction of the former.
Der Telephonstromkreis ist auf den Theilnehmerstationen durch Polarisationszellen oder Condensatoren g gegen den Batteriestrom verriegelt. The Telephonstromkreis is locked g against the battery current to the participator stations by polarization cells or condensers.
Die in Fig. 2 gezeichnete Schaltung unterscheidet sich nur insofern von der oben beschriebenen, als hier die Erde als Rückleiter dient.The circuit shown in Fig. 2 differs only in so far from the one described above, than here the earth serves as a return conductor.
Statt die Primärwicklung in den Nebenschlufszweig zu legen, könnte dieselbe auch in den Mikrophonzweig eingeschaltet werden, wobei dann der Mikrophon und PrimärwicklungInstead of placing the primary winding in the shunt branch, it could also be in the microphone branch are switched on, in which case the microphone and primary winding
umfassende Nebenschlufs einen geeigneten Widerstand mit oder ohne Condensator besitzen kann.comprehensive bypass have a suitable resistor with or without a condenser can.
Claims (1)
Eine Ausführungsform der Erfindung nach Anspruch i, bei welcher der zum Mikrophon gelegte Nebenschlufs die primäre Wicklung der Inductionsspule enthält.i. Telephone system with central microphone battery, characterized in that, while avoiding a special outward and return line for the microphone current, a branch is laid parallel to the telephone circuit on the subscriber stations, which contains a choke coil of high self-induction in series with the microphone, to which a shunt is laid.
An embodiment of the invention according to claim i, in which the shunt connected to the microphone contains the primary winding of the induction coil.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE138793T |
Publications (1)
Publication Number | Publication Date |
---|---|
DE126002C true DE126002C (en) |
Family
ID=5667470
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT126002D Active DE126002C (en) | |||
DENDAT138793D Active DE138793C (en) | |||
DENDAT137936D Active DE137936C (en) | |||
DE1905168606D Expired - Lifetime DE168606C (en) | 1901-01-07 | 1905-01-31 |
Family Applications After (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT138793D Active DE138793C (en) | |||
DENDAT137936D Active DE137936C (en) | |||
DE1905168606D Expired - Lifetime DE168606C (en) | 1901-01-07 | 1905-01-31 |
Country Status (1)
Country | Link |
---|---|
DE (4) | DE168606C (en) |
-
0
- DE DENDAT126002D patent/DE126002C/de active Active
- DE DENDAT138793D patent/DE138793C/de active Active
- DE DENDAT137936D patent/DE137936C/de active Active
-
1905
- 1905-01-31 DE DE1905168606D patent/DE168606C/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE137936C (en) | |
DE168606C (en) | |
DE138793C (en) |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE885872C (en) | Circuit arrangement in automatic telecommunications systems, e.g. B. Telephone systems, for occupying voters | |
DE2635021A1 (en) | CIRCUIT ARRANGEMENT FOR CHANGING THE IMPEDANCE CHARACTERISTICS OF A TRANSMISSION LINE | |
DE2939009A1 (en) | CIRCUIT ARRANGEMENT FOR DETERMINING THE SWITCHING STATE OF A SUBSCRIBER CONNECTION LINE IN TELEPHONE SWITCHING SYSTEMS | |
DE126002C (en) | ||
DE2922271C2 (en) | Circuit arrangement for feeding signal transmission lines in telecommunications systems | |
AT7894B (en) | Circuit arrangement for telephone systems with central microphone battery. | |
DE156866C (en) | ||
DE166526C (en) | ||
DE132673C (en) | ||
DE596007C (en) | System for the transmission of call or signal currents | |
DE710052C (en) | Touch device for alternating current telegraphy | |
DE154601C (en) | ||
DE138017C (en) | ||
DE194664C (en) | ||
DE151507C (en) | ||
DE149596C (en) | ||
DE133387C (en) | ||
DE89676C (en) | ||
DE142621C (en) | ||
DE206526C (en) | ||
DE437267C (en) | Circuit arrangement for telephone systems with several exchanges, in which the testing stations used for testing lines and connecting devices are only arranged in a few exchanges | |
DE696781C (en) | Circuit arrangement for subscriber stations with differential microphone | |
AT130089B (en) | Transmitter for automatic or semi-automatic telephone systems. | |
DE66977C (en) | Telephone switching for long distances | |
DE155104C (en) |