GB203274A - A system of long distance telephony - Google Patents
A system of long distance telephonyInfo
- Publication number
- GB203274A GB203274A GB661423A GB661423A GB203274A GB 203274 A GB203274 A GB 203274A GB 661423 A GB661423 A GB 661423A GB 661423 A GB661423 A GB 661423A GB 203274 A GB203274 A GB 203274A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplifier
- long distance
- receiving
- distance telephony
- conductor pair
- 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
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
203,274. Kilburn, B. E. D., (Naamlooze Vennootschap de Nederlandsche Thermo-Telephoon Maatschappij). March 7, 1923. Telephone systems; amplifying systems.-In a system of long-distance telephony two conductor pairs are provided from the subscriber's station to amplifiers at the exchange. Conductor pair f is used exclusively for receiving and is connected to amplifier m fed from the line i through transformers t. Conductor pair g is used for calling and for transmitting, and is connected to amplifier h. A relay o, adapted to place a shunt p across the receiving amplifier during transmission, is operated by current from the amplifier h and a rectifier n. An artificial line is connected at k.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB661423A GB203274A (en) | 1923-03-07 | 1923-03-07 | A system of long distance telephony |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB661423A GB203274A (en) | 1923-03-07 | 1923-03-07 | A system of long distance telephony |
Publications (1)
Publication Number | Publication Date |
---|---|
GB203274A true GB203274A (en) | 1923-09-06 |
Family
ID=9817657
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB661423A Expired GB203274A (en) | 1923-03-07 | 1923-03-07 | A system of long distance telephony |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB203274A (en) |
-
1923
- 1923-03-07 GB GB661423A patent/GB203274A/en not_active Expired
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