GB276021A - A method of reducing the interfering influences upon telephone and telegraph systems from currents of high frequencies in circuits fed by rectifiers - Google Patents
A method of reducing the interfering influences upon telephone and telegraph systems from currents of high frequencies in circuits fed by rectifiersInfo
- Publication number
- GB276021A GB276021A GB21370/27A GB2137027A GB276021A GB 276021 A GB276021 A GB 276021A GB 21370/27 A GB21370/27 A GB 21370/27A GB 2137027 A GB2137027 A GB 2137027A GB 276021 A GB276021 A GB 276021A
- Authority
- GB
- United Kingdom
- Prior art keywords
- choke
- telephone
- circuits
- rejector
- line
- 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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/08—Modifications for reducing interference; Modifications for reducing effects due to line faults ; Receiver end arrangements for detecting or overcoming line faults
- H04L25/085—Arrangements for reducing interference in line transmission systems, e.g. by differential transmission
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
- B60M1/02—Details
- B60M1/06—Arrangements along the power lines for reducing interference in nearby communication lines
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mechanical Engineering (AREA)
- Power Conversion In General (AREA)
Abstract
276,021. International General Electric Co., Inc., (Assignees of Allgemeine Elektricitõts Ges.). Aug. 14, 1926, [Convention date]. Filter circuits. - To reduce the interference on telephone and telegraph circuits due to alternating currents present in a rectifier-fed power distribution line a rejector circuit L, C in series with a choke L1 is inserted in the power line. The rejector circuit is tuned to a frequency between two harmonics occurring in the power line, preferably those frequencies which cause the greatest interference. The inductance L may be part of a choke coil, the remaining winding representing the choke L1 and may be provided with an iron core. Further rejector circuits may be inserted in the line if numerous interfering harmonics occur. Formulµ and numerical data are given in the Specification showing how the proportion of inductance to capacity of the rejector circuit and the ratio of its impedance to that of the choke may be determined.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE276021X | 1926-08-14 | ||
| DEA48533D DE466682C (en) | 1926-08-14 | 1926-08-15 | Device, especially for DC railway systems, to reduce the disruptive effects of currents of higher frequencies in rectifier-fed circuits on telecommunications systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB276021A true GB276021A (en) | 1928-07-05 |
Family
ID=25773472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21370/27A Expired GB276021A (en) | 1926-08-14 | 1927-08-13 | A method of reducing the interfering influences upon telephone and telegraph systems from currents of high frequencies in circuits fed by rectifiers |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE466682C (en) |
| GB (1) | GB276021A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2787733A (en) * | 1953-02-13 | 1957-04-02 | Hevi Duty Electric Co | Power distribution system |
-
1926
- 1926-08-15 DE DEA48533D patent/DE466682C/en not_active Expired
-
1927
- 1927-08-13 GB GB21370/27A patent/GB276021A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE466682C (en) | 1928-10-12 |
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