CH287403A - Device for guarding a line of a telegraph installation. - Google Patents

Device for guarding a line of a telegraph installation.

Info

Publication number
CH287403A
CH287403A CH287403DA CH287403A CH 287403 A CH287403 A CH 287403A CH 287403D A CH287403D A CH 287403DA CH 287403 A CH287403 A CH 287403A
Authority
CH
Switzerland
Prior art keywords
guarding
line
telegraph
installation
telegraph installation
Prior art date
Application number
Other languages
French (fr)
Inventor
Staatsbedrijf Der Po Telefonie
Original Assignee
Nederlanden Staat
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 Nederlanden Staat filed Critical Nederlanden Staat
Publication of CH287403A publication Critical patent/CH287403A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L15/00—Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code
    • H04L15/24—Apparatus or circuits at the receiving end
    • H04L15/26—Apparatus or circuits at the receiving end operating only on reception of predetermined code signals, e.g. distress signals, party-line call signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Alarm Systems (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
CH287403D 1946-09-14 1947-12-19 Device for guarding a line of a telegraph installation. CH287403A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL287403X 1946-09-14

Publications (1)

Publication Number Publication Date
CH287403A true CH287403A (en) 1952-11-30

Family

ID=19782591

Family Applications (1)

Application Number Title Priority Date Filing Date
CH287403D CH287403A (en) 1946-09-14 1947-12-19 Device for guarding a line of a telegraph installation.

Country Status (7)

Country Link
US (1) US2554596A (en)
BE (1) BE483170A (en)
CH (1) CH287403A (en)
DE (1) DE838317C (en)
FR (1) FR958115A (en)
GB (1) GB655371A (en)
NL (1) NL63019C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL211433A (en) * 1956-10-16

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2094733A (en) * 1933-05-25 1937-10-05 Rca Corp Automatic alarm selector
US2442427A (en) * 1946-04-03 1948-06-01 Automatic Elect Lab Supervisory alarm system for telephone interrupters

Also Published As

Publication number Publication date
BE483170A (en)
GB655371A (en) 1951-07-18
NL63019C (en)
FR958115A (en) 1950-03-03
DE838317C (en) 1952-05-08
US2554596A (en) 1951-05-29

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