BE477477A - - Google Patents

Info

Publication number
BE477477A
BE477477A BE477477DA BE477477A BE 477477 A BE477477 A BE 477477A BE 477477D A BE477477D A BE 477477DA BE 477477 A BE477477 A BE 477477A
Authority
BE
Belgium
Application number
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.)
Publication of BE477477A publication Critical patent/BE477477A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
    • H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Electrotherapy Devices (AREA)
  • Devices For Supply Of Signal Current (AREA)
BE477477D 1944-01-07 BE477477A (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR2498723X 1944-01-07
FR636253X 1944-01-08
FR2462144X 1945-03-27

Publications (1)

Publication Number Publication Date
BE477477A true BE477477A (fr)

Family

ID=32233873

Family Applications (1)

Application Number Title Priority Date Filing Date
BE477477D BE477477A (fr) 1944-01-07

Country Status (4)

Country Link
US (2) US2498723A (fr)
BE (1) BE477477A (fr)
FR (2) FR54628E (fr)
GB (1) GB636253A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2579530A (en) * 1947-04-29 1951-12-25 Int Standard Electric Corp Four-wire to two-wire connecting circuit
US2914615A (en) * 1952-10-09 1959-11-24 Int Standard Electric Corp Electric signal repeaters
NL287044A (fr) * 1961-12-21

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB323804A (en) * 1928-10-11 1930-01-13 Western Electric Y Improvements in impulse controlling arrangements for use in electrical signalling systems
NL215077A (fr) * 1931-07-02
US2047729A (en) * 1933-09-29 1936-07-14 Bell Telephone Labor Inc Transmission control in two-way signaling systems
US2029693A (en) * 1934-09-07 1936-02-04 Bell Telephone Labor Inc Telephone system
US2045402A (en) * 1935-01-17 1936-06-23 Bell Telephone Labor Inc Signaling system
US2056235A (en) * 1935-05-22 1936-10-06 Bell Telephone Labor Inc Resetting circuit for trigger devices
US2091551A (en) * 1935-06-22 1937-08-31 Bell Telephone Labor Inc Signaling system
US2222248A (en) * 1939-04-18 1940-11-19 Bell Telephone Labor Inc Ringing system
US2253621A (en) * 1940-04-05 1941-08-26 Bell Telephone Labor Inc Signaling system

Also Published As

Publication number Publication date
GB636253A (en) 1950-04-26
FR54628E (fr) 1950-07-07
US2498723A (en) 1950-02-28
FR960757A (fr) 1950-04-25
US2462144A (en) 1949-02-22

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