DE447919C - Circuit arrangement for private branch exchanges with amplifiers effective in both speech directions - Google Patents
Circuit arrangement for private branch exchanges with amplifiers effective in both speech directionsInfo
- Publication number
- DE447919C DE447919C DES64250D DES0064250D DE447919C DE 447919 C DE447919 C DE 447919C DE S64250 D DES64250 D DE S64250D DE S0064250 D DES0064250 D DE S0064250D DE 447919 C DE447919 C DE 447919C
- Authority
- DE
- Germany
- Prior art keywords
- amplifier
- circuit arrangement
- amplifiers
- effective
- private 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.)
- Expired
Links
- 238000004088 simulation Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000010076 replication Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/40—Applications of speech amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
Description
DEUTSCHES REICHGERMAN EMPIRE
AUSGEGEBEN AM
3. AUGUST 192?ISSUED ON
AUGUST 3, 192?
REICHSPATENTAMTREICH PATENT OFFICE
PATENTSCHRIFTPATENT LETTERING
M 447919 KLASSE 21a3 GRUPPE M 447919 CLASS 21a 3 GROUP
S 64250 Vllljsia3 Tag der Bekanntmachung über die Erteilung des Patents: 21. Juli 192J.S 64250 Vllljsia 3 day of the announcement of the grant of the patent: July 21, 192J.
Siemens & Halske Akt-Ges. in Berlin-Siemensstadt*).Siemens & Halske Akt-Ges. in Berlin-Siemensstadt *).
Schaltungsanordnung für Nebenstellenvermittlungen mit in beiden SprechrichtungenCircuit arrangement for private branch exchanges with both speech directions
wirksamen Verstärkern.effective amplifiers.
Die Erfindung betrifft eine Schaltungsanordnung, welche dazu dienen soll, Sende- und Empfangsverstärker von einer Nebenstellenvermittlung aus verschiedenen Nebenstellen wahlweise zuzuordnen.The invention relates to a circuit arrangement which is intended to be used for transmitting and Receiving amplifier from a private branch exchange from different branches optionally assignable.
Versuche, einen Doppelrohrzwischenverstärker als Zentralverstärker auszubilden, sind bisher daran gescheitert, daß die zum Teilnehmer führende kurze Leitung sich nicht genügend genau nachbilden läßt, und daßTry a double tube repeater to train as a central amplifier, have so far failed because the participants leading short line cannot be reproduced with sufficient accuracy, and that
*) Von dem Patentsucher ist als der Erfinder angegeben worden:*) The patent seeker stated as the inventor:
Dr. August Engelhardt in Berlin-Charlottenburg.Dr. August Engelhardt in Berlin-Charlottenburg.
daher leicht Störungen durch Pfeifen der Verstärker auftreten.therefore, interference from the amplifiers whistling can easily occur.
Erfindungsgemäß wird nun dieser Übelstand dadurch beseitigt,: daß die Teilnehmerseite des Verstärkers zu einer VierdrahtveT-bindung zum Teilnehmer aufgetrennt wird, so daß die Schaltung im Grunde die eines Gabelverstärkers im Vierdrahtbetrieb darstellt, an dessen Zweigstelle die Fernleitung, anAccording to the invention, this drawback is now eliminated: that the subscriber side of the amplifier to a four-wire connection is separated to the subscriber, so that the circuit basically represents that of a fork amplifier in four-wire operation, the trunk line at its branch
ίο dessen Verzweigungsarme Hörer und Mikrophon des jeweiligen Teilnehmers gesondert herangeführt werden können.ίο whose branching arms earpiece and microphone of the respective participant can be introduced separately.
Da bei einer derartigen Schaltung die Nachbildung der Teilnehmerleitung nicht mehrSince with such a circuit the simulation of the subscriber line is no longer
t5 erforderlich ist, entfallen auch die aus dieser Nachbildung herrührenden Schwierigkeiten.t5 is required, those from this are also omitted Difficulties arising from replication.
Auf der Zeichnung ist schematisch die erfindungsgeraäße Schaltungsanordnung veranschaulicht. Die zum. Ortsamt führende LeitungIn the drawing, the erfindungsgeraässer is schematically Circuit arrangement illustrated. The for. Local office leading line
ao (Fernleitung) wird an die Verstärkerschal-, tung V, V1 über die Klinke KL und eine Differenzschaltung angelegt. N bezeichnet die Nachbildung der Femleitung, "die aus einer genauen Nachbildung der Amtsschaltung be-ao (long-distance line) is applied to the amplifier circuit V, V 1 via the jack KL and a differential circuit. N denotes the replica of the trunk line, "which is derived from an exact replica of the trunk circuit
a5 steht, an deren Ende zur Nachbildung der weitergehenden Leitungen eine Parallel- oder Serienschaltung von Widerständen und Kapazitäten gelegt wird, welche veränderlich gemacht werden können zwecks Anpassung an den Schemwiderstand der verschiedenen anzuschließenden Leitungen. Zur Erzielung eines guten Abgieiches am Verzweigungspunkt für Leitungen mit verschiedenem Scheinwiderstan'd wird zweckmäßig je eine veränderliche oder feste künstliche Dämpfung vor Leitung und Kunstleitunig geschaltet, so daß" etwaige geringe 'Ungenauigkeiten in der Nachbildung der Fernleitung nicht merklich ins Gewicht fallen. Die Sprechrolle S ist in das Amt verlegt. Bei uaverstärktem Gesprach wird die normale Klinke KN benutzt, mit welcher die Fernleitung gestöpselt wird. Bei verstärktem Gespräch wird die Fernleitung bei KL eingeführt und die Verstärkergarnitur mittels eines Doppelstöpsels in KVT und KVM an Hörer und Mikrophon des Teilnehmers gelegt, während gleichzeitig das Relais R betätigt wird, welches die Ausschaltung der Spule S und die getrennte Heranführung von T und M besorgt.a5, at the end of which a parallel or series connection of resistors and capacitors is placed to simulate the further lines, which can be made variable for the purpose of adapting to the schematic resistance of the various lines to be connected. In order to achieve a good balance at the branch point for lines with different impedance, it is advisable to use variable or fixed artificial attenuation before the line and the artificial line so that "any minor inaccuracies in the simulation of the long-distance line are not noticeable. The speaking role S is relocated to the office. In the event of an amplified conversation, the normal KN jack is used, with which the trunk line is plugged. When the conversation is intensified, the trunk line is introduced at KL and the amplifier set is connected to the subscriber's receiver and microphone using a double plug in KVT and KVM, while the relay R is actuated at the same time, which takes care of the disconnection of the coil S and the separate introduction of T and M.
Eine nähere Beschreibung der Stromläufe dürfte sich wohl erübrigen, da diese nichts Besonderes bieten.A more detailed description of the current flows should be unnecessary, as these are nothing Offer something special.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES64250D DE447919C (en) | 1923-11-06 | 1923-11-06 | Circuit arrangement for private branch exchanges with amplifiers effective in both speech directions |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES64250D DE447919C (en) | 1923-11-06 | 1923-11-06 | Circuit arrangement for private branch exchanges with amplifiers effective in both speech directions |
Publications (1)
Publication Number | Publication Date |
---|---|
DE447919C true DE447919C (en) | 1927-08-03 |
Family
ID=7497028
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DES64250D Expired DE447919C (en) | 1923-11-06 | 1923-11-06 | Circuit arrangement for private branch exchanges with amplifiers effective in both speech directions |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE447919C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE973727C (en) * | 1953-11-03 | 1960-05-19 | Normalzeit G M B H | Circuit arrangement for telephone systems with dialer operation, which allow the mutual switching of two-wire and four-wire operated stations within one and the same local network |
-
1923
- 1923-11-06 DE DES64250D patent/DE447919C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE973727C (en) * | 1953-11-03 | 1960-05-19 | Normalzeit G M B H | Circuit arrangement for telephone systems with dialer operation, which allow the mutual switching of two-wire and four-wire operated stations within one and the same local network |
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