FR22488E - Système de signaux - Google Patents

Système de signaux

Info

Publication number
FR22488E
FR22488E FR22488A FR22488DA FR22488E FR 22488 E FR22488 E FR 22488E FR 22488 A FR22488 A FR 22488A FR 22488D A FR22488D A FR 22488DA FR 22488 E FR22488 E FR 22488E
Authority
FR
France
Prior art keywords
signal system
signal
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
FR22488A
Other languages
English (en)
Inventor
Pierre Trichard
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
Application granted granted Critical
Publication of FR22488E publication Critical patent/FR22488E/fr
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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
FR22488A 1919-10-03 1918-11-19 Système de signaux Expired FR22488E (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR22614T 1919-10-03

Publications (1)

Publication Number Publication Date
FR22488E true FR22488E (fr) 1921-07-12

Family

ID=8661458

Family Applications (3)

Application Number Title Priority Date Filing Date
FR499958A Expired FR499958A (fr) 1919-10-03 1918-08-07 Système de signaux
FR22488A Expired FR22488E (fr) 1919-10-03 1918-11-19 Système de signaux
FR22614A Expired FR22614E (fr) 1919-10-03 1919-10-03 Système de signaux

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR499958A Expired FR499958A (fr) 1919-10-03 1918-08-07 Système de signaux

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR22614A Expired FR22614E (fr) 1919-10-03 1919-10-03 Système de signaux

Country Status (1)

Country Link
FR (3) FR499958A (fr)

Also Published As

Publication number Publication date
FR22614E (fr) 1921-08-04
FR499958A (fr) 1920-02-27

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