GB206715A - Improvements in or relating to repeating systems and apparatus therefor, particularly for telephone systems - Google Patents
Improvements in or relating to repeating systems and apparatus therefor, particularly for telephone systemsInfo
- Publication number
- GB206715A GB206715A GB3263322A GB3263322A GB206715A GB 206715 A GB206715 A GB 206715A GB 3263322 A GB3263322 A GB 3263322A GB 3263322 A GB3263322 A GB 3263322A GB 206715 A GB206715 A GB 206715A
- Authority
- GB
- United Kingdom
- Prior art keywords
- line
- relay
- circuit
- repeating
- current
- 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)
- Interface Circuits In Exchanges (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
206,715. Western Electric Co., Ltd., (Western Electric Co., Inc.). Nov. 29, 1922. Repeating and amplifying systems.-A two-way repeater has a pair of relays, one of which is operated by current in each direction to render the repeater effective in that direction, and a loaded circuit is provided to delay the incoming signals when this is done. In one form, incoming current over the line 10, Fig. 1, energizes a relay 45 which supplies anode potential to a thermionic valve 14 over a relay 39 and a chokecoil 41, and current to the input transformer 13 is delayed by the loaded circuit 12 comprising series inductances and shunt condensers. The amplified signals pass to the line 23 through a transformer 20. The relay 52 which is operated by incoming current over the line 23 is ineffective to bring the corresponding valve 30 into action, since the circuit supplying anode potential is broken by the energization of the relay 39. In a second form, the line 70, Fig. 2, is connected directly to the repeating element 71, and part of the output current passes to a rectifier 73 and energizes relays 74, 75, thereby unbalancing a bridge 76 to allow the signals to pass to the line 77, and opening the circuit of the rectifier 78 to prevent retroaction. The loaded delay circuit 81 is inserted between the repeating element 71 and the bridge 76. The relay 74 may alternatively remove a shunt across the outgoing line.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US322154A US1434790A (en) | 1919-09-06 | 1919-09-06 | Two-way transmission with repeaters |
GB2977522A GB208313A (en) | 1922-11-29 | 1922-10-31 | Improvements in signalling systems |
FR558197D FR558197A (en) | 1922-11-29 | 1922-11-02 | Improvements in signaling systems |
DEB107039D DE474179C (en) | 1922-11-04 | 1922-11-04 | Circuit arrangement for transmitting telephone and signal currents with amplifiers for each traffic direction |
GB3263322A GB206715A (en) | 1922-11-29 | 1922-11-29 | Improvements in or relating to repeating systems and apparatus therefor, particularly for telephone systems |
DEI23244D DE473657C (en) | 1922-11-29 | 1922-12-05 | Circuit arrangement for two-way amplifiers in telecommunications systems |
FR27226D FR27226E (en) | 1922-11-29 | 1923-01-10 | Improvements in signaling systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3263322A GB206715A (en) | 1922-11-29 | 1922-11-29 | Improvements in or relating to repeating systems and apparatus therefor, particularly for telephone systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB206715A true GB206715A (en) | 1923-11-15 |
Family
ID=10341666
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2977522A Expired GB208313A (en) | 1922-11-29 | 1922-10-31 | Improvements in signalling systems |
GB3263322A Expired GB206715A (en) | 1919-09-06 | 1922-11-29 | Improvements in or relating to repeating systems and apparatus therefor, particularly for telephone systems |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2977522A Expired GB208313A (en) | 1922-11-29 | 1922-10-31 | Improvements in signalling systems |
Country Status (2)
Country | Link |
---|---|
FR (2) | FR558197A (en) |
GB (2) | GB208313A (en) |
-
1922
- 1922-10-31 GB GB2977522A patent/GB208313A/en not_active Expired
- 1922-11-02 FR FR558197D patent/FR558197A/en not_active Expired
- 1922-11-29 GB GB3263322A patent/GB206715A/en not_active Expired
-
1923
- 1923-01-10 FR FR27226D patent/FR27226E/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB208313A (en) | 1923-12-20 |
FR27226E (en) | 1924-05-24 |
FR558197A (en) | 1923-08-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2070900A (en) | Thermionic relay circuit | |
USRE22897E (en) | Transmission system | |
US3027429A (en) | Loudspeaking telephone instrument | |
US2018464A (en) | Voice operated transmission circuit | |
US2273945A (en) | Two-way speech transmission | |
US2369351A (en) | Telephone substation circuit | |
GB206715A (en) | Improvements in or relating to repeating systems and apparatus therefor, particularly for telephone systems | |
US1992774A (en) | Alternating current transmission system such as telephone systems incorporating echosuppressors | |
US2034703A (en) | Transmission control in signaling systems | |
US2004759A (en) | Ringing repeater | |
GB430158A (en) | Improvements in or relating to telephone systems | |
US1906338A (en) | Telephone system | |
US2054906A (en) | Transmission control in signaling systems | |
US2462144A (en) | Pulse receiving and repeating system | |
US1311650A (en) | Signal system | |
US1880714A (en) | Gas-filled tube circuits | |
US1364159A (en) | Through-ringing repeater-circuits | |
US1889005A (en) | Voice current repeater | |
US1737423A (en) | Automatic telephone system | |
US2153040A (en) | Signal transmission system | |
US1690182A (en) | Suppression of echoes and singing in four-wire circuits | |
US1840015A (en) | Transmission control circuit | |
US2946853A (en) | Impulsing generating circuits | |
US1699129A (en) | Amplifier connection | |
US2280158A (en) | Two-way signal transmission system |