FR1053491A - Improvements to selective action devices for the passage of a telephone line of four wires into two wires - Google Patents

Improvements to selective action devices for the passage of a telephone line of four wires into two wires

Info

Publication number
FR1053491A
FR1053491A FR1053491DA FR1053491A FR 1053491 A FR1053491 A FR 1053491A FR 1053491D A FR1053491D A FR 1053491DA FR 1053491 A FR1053491 A FR 1053491A
Authority
FR
France
Prior art keywords
wires
passage
telephone line
selective action
action devices
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
Other languages
French (fr)
Inventor
Armel Picquenard
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 filed Critical
Application granted granted Critical
Publication of FR1053491A publication Critical patent/FR1053491A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
FR1053491D 1952-04-07 1952-04-07 Improvements to selective action devices for the passage of a telephone line of four wires into two wires Expired FR1053491A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1053491T 1952-04-07

Publications (1)

Publication Number Publication Date
FR1053491A true FR1053491A (en) 1954-02-02

Family

ID=9595952

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1053491D Expired FR1053491A (en) 1952-04-07 1952-04-07 Improvements to selective action devices for the passage of a telephone line of four wires into two wires

Country Status (1)

Country Link
FR (1) FR1053491A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1013595B (en) * 1955-03-16 1957-08-14 Wallram Hartmetall Striking mechanism for drills, hammer drills, demolition hammers, etc. like

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1013595B (en) * 1955-03-16 1957-08-14 Wallram Hartmetall Striking mechanism for drills, hammer drills, demolition hammers, etc. like

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