GB269996A - Improvements relating to electric signalling systems employing carrier waves - Google Patents
Improvements relating to electric signalling systems employing carrier wavesInfo
- Publication number
- GB269996A GB269996A GB2919/26A GB291926A GB269996A GB 269996 A GB269996 A GB 269996A GB 2919/26 A GB2919/26 A GB 2919/26A GB 291926 A GB291926 A GB 291926A GB 269996 A GB269996 A GB 269996A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lines
- frequency bands
- bands
- carrier waves
- improvements relating
- 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
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/12—Arrangements for reducing cross-talk between channels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T24/00—Buckles, buttons, clasps, etc.
- Y10T24/21—Strap tighteners
- Y10T24/2102—Cam lever and loop
- Y10T24/2119—Tie chain tighteners
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Noise Elimination (AREA)
- Communication Cables (AREA)
Abstract
269,996. Standard Telephones &. Cables, Ltd., (Western Electric Co. Inc.). Feb. 1, 1926. Multiplex systems. - The frequency bands 1 - - 6 used on one carrier wave line A are staggered in relation to the frequency bands used on an adjacent line on lines B, C, as indicated in Fig. 3, in which frequencies are plotted on the horizontal axis. In this way, the important frequencies occurring at the middle of the bands, as indicated in the lower part of the figure, coincide with the gaps between the bands in the adjacent lines, and the effects of crosstalk between the lines is minimized. When a number of lines are supported on the same poles, the lines are placed in the order ABCAB . . ., in order to obtain maximum spacing between the lines using the same frequency bands. Preferably, only the upper or the lower side band is transmitted on the lines, the carrier being suppressed.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US1656158D US1656158A (en) | 1926-02-01 | Reducing intersystem cross talk between carrier channels | |
GB2919/26A GB269996A (en) | 1926-02-01 | 1926-02-01 | Improvements relating to electric signalling systems employing carrier waves |
FR616822D FR616822A (en) | 1926-02-01 | 1926-04-21 | Carrier wave transmission systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2919/26A GB269996A (en) | 1926-02-01 | 1926-02-01 | Improvements relating to electric signalling systems employing carrier waves |
Publications (1)
Publication Number | Publication Date |
---|---|
GB269996A true GB269996A (en) | 1927-05-02 |
Family
ID=9748535
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2919/26A Expired GB269996A (en) | 1926-02-01 | 1926-02-01 | Improvements relating to electric signalling systems employing carrier waves |
Country Status (3)
Country | Link |
---|---|
US (1) | US1656158A (en) |
FR (1) | FR616822A (en) |
GB (1) | GB269996A (en) |
-
0
- US US1656158D patent/US1656158A/en not_active Expired - Lifetime
-
1926
- 1926-02-01 GB GB2919/26A patent/GB269996A/en not_active Expired
- 1926-04-21 FR FR616822D patent/FR616822A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US1656158A (en) | 1928-01-17 |
FR616822A (en) | 1927-02-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ES481484A1 (en) | Telephone cable with improved shield combination | |
GB549948A (en) | Carrier frequency telephone system | |
GB269996A (en) | Improvements relating to electric signalling systems employing carrier waves | |
GB332284A (en) | Improvements in electrical transmission systems | |
US2184826A (en) | Signal transmission system | |
ES404296A1 (en) | Frequency shifted modulated carrier protective relaying system with amplitude modulated voice communication | |
US1954185A (en) | Method of transmitting signals on short radiowaves | |
US1721567A (en) | Multiplex radio transmitting system | |
GB550912A (en) | Reduction of cross-talk | |
GB534213A (en) | Improvements in or relating to multiplex signalling systems | |
JPS5228809A (en) | Telephone use acoustic coupler | |
GB351543A (en) | Improvements in or relating to submarine signalling cables provided with repeaters | |
GB440241A (en) | Improvements in or relating to multi-channel electric signalling systems | |
GB379796A (en) | Improvements in or relating to high frequency electrical transmission lines | |
GB418707A (en) | Multi-channel carrier transmission system designed more particularly for cable circuits | |
GB352095A (en) | Improvements in or relating to electric signal band reduction | |
GB457280A (en) | Improvements in or relating to electric communication cables | |
GB466071A (en) | High frequency wave electrical signalling systems | |
US1849859A (en) | Method of eliminating fading | |
GB636928A (en) | Improvements in or relating to carrier telephony systems | |
GB236654A (en) | Improvements in or relating to multiplex telegraphy and radio-telegraphy | |
GB520756A (en) | Transmitting and receiving system for multiplex telephony or such like | |
ES202909A1 (en) | A telephone system of wave carrier on a single side band (Machine-translation by Google Translate, not legally binding) | |
DK59066C (en) | Signal receiver at Telephone systems, in which Signals are transmitted at an AC current within the Voice Frequency band. | |
JPS534413A (en) | Hybrid multiplez transmission systen for broacdast lines and telephone lines |