GB416372A - Improvements in or relating to the control of attenuation in alternating current transmission systems such as telephone or like systems - Google Patents
Improvements in or relating to the control of attenuation in alternating current transmission systems such as telephone or like systemsInfo
- Publication number
- GB416372A GB416372A GB24310/34A GB2431034A GB416372A GB 416372 A GB416372 A GB 416372A GB 24310/34 A GB24310/34 A GB 24310/34A GB 2431034 A GB2431034 A GB 2431034A GB 416372 A GB416372 A GB 416372A
- Authority
- GB
- United Kingdom
- Prior art keywords
- systems
- attenuation
- telephone
- relating
- control
- 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)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
416,372. Two-way repeaters. RYALL, L. E., 52, Crescent Gardens, Eastcote, Middlesex. March 1, 1933, No. 24310 /34. Divided out of 415,767. Drawings to Specification. [Class 40 (iv).] In a two-way repeater each path includes an attenuation network comprising metal rectifiers arranged as series and/or shunt elements and variably controlled by the anode current of a valve in dependence on A.C. signals flowing in the other path. The detailed description is identical with that of Specification 415,767.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB6227/33A GB415767A (en) | 1933-03-01 | 1933-03-01 | Improvements in alternating current transmission systems such as telephone systems incorporating echo suppressors |
Publications (1)
Publication Number | Publication Date |
---|---|
GB416372A true GB416372A (en) | 1934-09-03 |
Family
ID=9810720
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB6227/33A Expired GB415767A (en) | 1933-03-01 | 1933-03-01 | Improvements in alternating current transmission systems such as telephone systems incorporating echo suppressors |
GB24310/34A Expired GB416372A (en) | 1933-03-01 | 1933-03-01 | Improvements in or relating to the control of attenuation in alternating current transmission systems such as telephone or like systems |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB6227/33A Expired GB415767A (en) | 1933-03-01 | 1933-03-01 | Improvements in alternating current transmission systems such as telephone systems incorporating echo suppressors |
Country Status (6)
Country | Link |
---|---|
US (1) | US1992774A (en) |
BE (1) | BE401674A (en) |
DE (1) | DE672795C (en) |
FR (1) | FR769401A (en) |
GB (2) | GB415767A (en) |
NL (1) | NL39810C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE882420C (en) * | 1938-04-12 | 1953-07-09 | Siemens Ag | Circuit arrangement for feedback locks in loudspeaker systems |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2164344A (en) * | 1938-04-28 | 1939-07-04 | Bell Telephone Labor Inc | Signal transmission system |
GB561405A (en) * | 1942-11-14 | 1944-05-18 | Automatic Telephone & Elect | Improvements in or relating to telecommunication systems |
US2511468A (en) * | 1945-01-15 | 1950-06-13 | Telephone Mfg Co Ltd | Electrical control network |
DE842503C (en) * | 1948-12-09 | 1952-06-26 | Rudolf Wagner | Circuit arrangement for controlling the transmission rate of telecommunication systems |
DE849572C (en) * | 1948-12-09 | 1952-09-15 | Rudolf Wagner | Circuit arrangement for controlling the transmission rate of telecommunication systems |
US2949579A (en) * | 1957-12-27 | 1960-08-16 | Mc Graw Edison Co | Transistor amplifier with a.v.c. |
-
0
- NL NL39810D patent/NL39810C/xx active
- BE BE401674D patent/BE401674A/xx unknown
-
1933
- 1933-03-01 GB GB6227/33A patent/GB415767A/en not_active Expired
- 1933-03-01 GB GB24310/34A patent/GB416372A/en not_active Expired
-
1934
- 1934-02-19 US US711922A patent/US1992774A/en not_active Expired - Lifetime
- 1934-02-25 DE DEG87523D patent/DE672795C/en not_active Expired
- 1934-02-27 FR FR769401D patent/FR769401A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE882420C (en) * | 1938-04-12 | 1953-07-09 | Siemens Ag | Circuit arrangement for feedback locks in loudspeaker systems |
Also Published As
Publication number | Publication date |
---|---|
FR769401A (en) | 1934-08-25 |
US1992774A (en) | 1935-02-26 |
NL39810C (en) | |
DE672795C (en) | 1939-03-10 |
BE401674A (en) | |
GB415767A (en) | 1934-09-03 |
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