GB269996A - Improvements relating to electric signalling systems employing carrier waves - Google Patents

Improvements relating to electric signalling systems employing carrier waves

Info

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
Application number
GB2919/26A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to US1656158D priority Critical patent/US1656158A/en
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Priority to GB2919/26A priority patent/GB269996A/en
Priority to FR616822D priority patent/FR616822A/en
Publication of GB269996A publication Critical patent/GB269996A/en
Expired legal-status Critical Current

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

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.
GB2919/26A 1926-02-01 1926-02-01 Improvements relating to electric signalling systems employing carrier waves Expired GB269996A (en)

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)

Also Published As

Publication number Publication date
FR616822A (en) 1927-02-09
US1656158A (en) 1928-01-17

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