GB176827A - Method of cable signalling - Google Patents

Method of cable signalling

Info

Publication number
GB176827A
GB176827A GB28714/20A GB2871420A GB176827A GB 176827 A GB176827 A GB 176827A GB 28714/20 A GB28714/20 A GB 28714/20A GB 2871420 A GB2871420 A GB 2871420A GB 176827 A GB176827 A GB 176827A
Authority
GB
United Kingdom
Prior art keywords
bridge
signalling
current
arms
signals
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
GB28714/20A
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.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Priority to GB28714/20A priority Critical patent/GB176827A/en
Priority to FR526031A priority patent/FR526031A/en
Publication of GB176827A publication Critical patent/GB176827A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/06—Channels characterised by the type of signal the signals being represented by different frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

176,827. Pernot, F. E., and Rich, L. J. Oct. 11, 1920. Multiplex signalling.-In an arrangement of apparatus for the simultaneous transmission of alternating-current signals of different frequencies and of directcurrent signals, the cable 2 is connected to a duplex bridge, direct-current signals being received by a siphon recorder 9, for example, between the arms of the bridge. In two arms of the bridge are condensers 8, the common point being connected to earth at 6, and in this connection are generators 1 of alternating current with signalling-keys k, and direct-current signalling-apparatus d in parallel. The receiving apparatus such as telephones 3 for the alternating current are connected across the other two arms of the bridge. through amplifiers a. Devices 7 for comibining, and tuning devices s for separating, the currents of different frequencies are also employed.
GB28714/20A 1920-10-11 1920-10-11 Method of cable signalling Expired GB176827A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB28714/20A GB176827A (en) 1920-10-11 1920-10-11 Method of cable signalling
FR526031A FR526031A (en) 1920-10-11 1920-10-14 Improvements in methods of transmission of electric telegraphy by cables

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB28714/20A GB176827A (en) 1920-10-11 1920-10-11 Method of cable signalling
FR526031T 1920-10-14

Publications (1)

Publication Number Publication Date
GB176827A true GB176827A (en) 1922-03-13

Family

ID=10279907

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28714/20A Expired GB176827A (en) 1920-10-11 1920-10-11 Method of cable signalling

Country Status (2)

Country Link
FR (1) FR526031A (en)
GB (1) GB176827A (en)

Also Published As

Publication number Publication date
FR526031A (en) 1921-09-30

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