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FR726997A - Improvements to telegraph systems - Google Patents

Improvements to telegraph systems

Info

Publication number
FR726997A
FR726997A FR726997DA FR726997A FR 726997 A FR726997 A FR 726997A FR 726997D A FR726997D A FR 726997DA FR 726997 A FR726997 A FR 726997A
Authority
FR
France
Prior art keywords
telegraph systems
telegraph
systems
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)
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.)
Associated Telephone and Telegraph Co
Original Assignee
Associated Telephone and Telegraph Co
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 Associated Telephone and Telegraph Co filed Critical Associated Telephone and Telegraph Co
Application granted granted Critical
Publication of FR726997A publication Critical patent/FR726997A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/20—Repeater circuits; Relay circuits
    • H04L25/24—Relay circuits using discharge tubes or semiconductor devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Audible And Visible Signals (AREA)
FR726997D 1930-11-28 1931-11-27 Improvements to telegraph systems Expired FR726997A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US498541A US1960569A (en) 1930-11-28 1930-11-28 Telegraph system

Publications (1)

Publication Number Publication Date
FR726997A true FR726997A (en) 1932-06-10

Family

ID=23981495

Family Applications (1)

Application Number Title Priority Date Filing Date
FR726997D Expired FR726997A (en) 1930-11-28 1931-11-27 Improvements to telegraph systems

Country Status (3)

Country Link
US (1) US1960569A (en)
FR (1) FR726997A (en)
GB (1) GB393288A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2930849A (en) * 1956-11-13 1960-03-29 Stelma Inc Telegraph repeater system

Also Published As

Publication number Publication date
GB393288A (en) 1933-05-30
US1960569A (en) 1934-05-29

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