FR847831A - Telegraph repeater systems - Google Patents

Telegraph repeater systems

Info

Publication number
FR847831A
FR847831A FR847831DA FR847831A FR 847831 A FR847831 A FR 847831A FR 847831D A FR847831D A FR 847831DA FR 847831 A FR847831 A FR 847831A
Authority
FR
France
Prior art keywords
repeater systems
telegraph repeater
telegraph
systems
repeater
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.)
Creed and Co Ltd
Original Assignee
Creed and 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 Creed and Co Ltd filed Critical Creed and Co Ltd
Application granted granted Critical
Publication of FR847831A publication Critical patent/FR847831A/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)
  • Selective Calling Equipment (AREA)
  • Microwave Tubes (AREA)
  • Emergency Protection Circuit Devices (AREA)
FR847831D 1937-12-20 1938-12-20 Telegraph repeater systems Expired FR847831A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US180717A US2220379A (en) 1937-12-20 1937-12-20 Magnetron telegraphic repeater

Publications (1)

Publication Number Publication Date
FR847831A true FR847831A (en) 1939-10-17

Family

ID=22661487

Family Applications (1)

Application Number Title Priority Date Filing Date
FR847831D Expired FR847831A (en) 1937-12-20 1938-12-20 Telegraph repeater systems

Country Status (4)

Country Link
US (1) US2220379A (en)
DE (1) DE902502C (en)
FR (1) FR847831A (en)
GB (1) GB504708A (en)

Also Published As

Publication number Publication date
GB504708A (en) 1939-04-28
DE902502C (en) 1954-01-25
US2220379A (en) 1940-11-05

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