GB216147A - Improvements in electric signalling systems - Google Patents

Improvements in electric signalling systems

Info

Publication number
GB216147A
GB216147A GB12001/24A GB1200124A GB216147A GB 216147 A GB216147 A GB 216147A GB 12001/24 A GB12001/24 A GB 12001/24A GB 1200124 A GB1200124 A GB 1200124A GB 216147 A GB216147 A GB 216147A
Authority
GB
United Kingdom
Prior art keywords
receiving
power lines
transmitting apparatus
coil
conductor
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
GB12001/24A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB216147A publication Critical patent/GB216147A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/56—Circuits for coupling, blocking, or by-passing of signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5416—Methods of transmitting or receiving signals via power distribution lines by adding signals to the wave form of the power source
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5429—Applications for powerline communications
    • H04B2203/5441—Wireless systems or telephone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5466—Systems for power line communications using three phases conductors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5491—Systems for power line communications using filtering and bypassing

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

216,147. British Thomson-Houston Co., Ltd., (Assignees of Baker, W. R. G.). May 19, 1923, [Convention date]. Combined transmitting and receiving arrangements; wired wireless systems. - Modulated highfrequency oscillations are transmitted over power lines, the receiving and transmitting apparatus being alternately coupled to the power lines, and means are provided to prevent the accumulation of an electric charge on the coupling line when neither receiving nor transmitting apparatus is connected to the line. The Figure shows power lines 1 - - 3 and a coupling conductor 4 extending a thousand feet or more parallel and close thereto. A switch 5 serves to connect either the receiving apparatus 6 or the transmitting apparatus 7, while a coil 9, offering a high impedance to signalling currents and a low impedance to induced currents from the power conductors, is connected between the conductor 4 and earth. The coil 9 may be shunted by a spark-gap 10 to discharge high potentials.
GB12001/24A 1923-05-19 1924-05-15 Improvements in electric signalling systems Expired GB216147A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US216147XA 1923-05-19 1923-05-19

Publications (1)

Publication Number Publication Date
GB216147A true GB216147A (en) 1924-08-28

Family

ID=21805203

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12001/24A Expired GB216147A (en) 1923-05-19 1924-05-15 Improvements in electric signalling systems

Country Status (2)

Country Link
FR (1) FR581735A (en)
GB (1) GB216147A (en)

Also Published As

Publication number Publication date
FR581735A (en) 1924-12-04

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