GB374528A - Coupling a two-way path to two one-way paths in electric signalling systems and devices therefor - Google Patents
Coupling a two-way path to two one-way paths in electric signalling systems and devices thereforInfo
- Publication number
- GB374528A GB374528A GB803631A GB803631A GB374528A GB 374528 A GB374528 A GB 374528A GB 803631 A GB803631 A GB 803631A GB 803631 A GB803631 A GB 803631A GB 374528 A GB374528 A GB 374528A
- Authority
- GB
- United Kingdom
- Prior art keywords
- windings
- way
- line
- coil
- lines
- 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
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/54—Circuits using the same frequency for two directions of communication
- H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/03—Hybrid circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Telephone Function (AREA)
Abstract
374,528. Two-way transmission. STANDARD TELEPHONES & CABLES, Ltd., LATIMER, K. E., and RENDALL, A. R. A., Connaught House, Aldwych, London. March 16, 1931, No. 8036. [Class 40 (iv).] A hybrid coil for connection to a two-way line without the interposition of repeating coils, and having the windings of the twoway line, two one-way lines and balancing network insulated from each other, is so arranged that currents flowing through the conductors of the two-way line in parallel (phantom circuit, simplex telegraph or interference currents) and passing through the phantom tap to other circuits or through the self capacity of the windings to earth, do not give rise to currents in the one-way paths. The output and input windings in the one-way paths may be connected directly in the grid or anode circuits of the amplifying valves. Arrangements are also described for varying the ratio of the windings and for using the same coil on lines of different impedances, and for connecting the coil to the one-way paths over a second hybrid coil. In the arrangement shown in Fig. 2, the line windings are subdivided and cross-connected to obtain the desired result. To provide against interference only, the capacity to earth or other point of the line windings is concentrated at the points of connection of the windings to the two-way line. This may be done, as shown in Fig. 6, by enclosing the line windings in a live shield and interposing shields, preferably earthed, between the live shields and the one-way windings ; or a one-way path winding and the corresponding network winding are wound first on a spool followed by an earthed screen and then the corresponding line winding the inner end of which is connected to line, the other windings being similarly arranged on a second spool. In the modification shown in Fig. 4, a coil H with cross-connected windings as in Fig. 2 is provided with modified input and output windings connected to the one-way paths R1, R2 by a second hybrid coil W4, W5, W6. The impedance of the lines may be equalized over jacks J used also for measuring. The arrangement shown in Fig. 5 using a coil in which the line to network ratio is not unity may be applied to the arrangements previously described. This arrangement may be used to work on lines of two different suitable impedances by interchanging the line and network connections, and the gain may be measured by an instrument having only one of these impedances. Tappings may be used to connect to lines of other impedances and to obtain gain measurements. As shown, the hybrid coil may be arranged to work with line of impedance 2R, R, or ¢R (tapping) but when the cross-connection method, Fig. 2, is used, an additional winding is preferable to the tap.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR743211D FR743211A (en) | 1931-03-16 | ||
BE386936D BE386936A (en) | 1931-03-16 | ||
GB803631A GB374528A (en) | 1931-03-16 | 1931-03-16 | Coupling a two-way path to two one-way paths in electric signalling systems and devices therefor |
DEI43986D DE624704C (en) | 1931-03-16 | 1932-03-12 | Hybrid connection with compensating beams |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB803631A GB374528A (en) | 1931-03-16 | 1931-03-16 | Coupling a two-way path to two one-way paths in electric signalling systems and devices therefor |
Publications (1)
Publication Number | Publication Date |
---|---|
GB374528A true GB374528A (en) | 1932-06-16 |
Family
ID=9844543
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB803631A Expired GB374528A (en) | 1931-03-16 | 1931-03-16 | Coupling a two-way path to two one-way paths in electric signalling systems and devices therefor |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE386936A (en) |
DE (1) | DE624704C (en) |
FR (1) | FR743211A (en) |
GB (1) | GB374528A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4103118A (en) * | 1977-05-02 | 1978-07-25 | Synanon Foundation, Inc. | Autobalance hybrid circuit |
-
0
- BE BE386936D patent/BE386936A/xx unknown
- FR FR743211D patent/FR743211A/fr not_active Expired
-
1931
- 1931-03-16 GB GB803631A patent/GB374528A/en not_active Expired
-
1932
- 1932-03-12 DE DEI43986D patent/DE624704C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4103118A (en) * | 1977-05-02 | 1978-07-25 | Synanon Foundation, Inc. | Autobalance hybrid circuit |
Also Published As
Publication number | Publication date |
---|---|
DE624704C (en) | 1936-01-28 |
BE386936A (en) | |
FR743211A (en) | 1933-03-25 |
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