FR829450A - Improvements to signaling systems - Google Patents

Improvements to signaling systems

Info

Publication number
FR829450A
FR829450A FR829450DA FR829450A FR 829450 A FR829450 A FR 829450A FR 829450D A FR829450D A FR 829450DA FR 829450 A FR829450 A FR 829450A
Authority
FR
France
Prior art keywords
signaling systems
signaling
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.)
Lignes Telegraphiques et Telephoniques LTT SA
Original Assignee
Lignes Telegraphiques et Telephoniques LTT SA
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 Lignes Telegraphiques et Telephoniques LTT SA filed Critical Lignes Telegraphiques et Telephoniques LTT SA
Application granted granted Critical
Publication of FR829450A publication Critical patent/FR829450A/en
Expired legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Amplifiers (AREA)
FR829450D 1936-11-18 1937-11-18 Improvements to signaling systems Expired FR829450A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US111397A US2145053A (en) 1936-11-18 1936-11-18 Signaling system

Publications (1)

Publication Number Publication Date
FR829450A true FR829450A (en) 1938-06-27

Family

ID=22338309

Family Applications (1)

Application Number Title Priority Date Filing Date
FR829450D Expired FR829450A (en) 1936-11-18 1937-11-18 Improvements to signaling systems

Country Status (2)

Country Link
US (1) US2145053A (en)
FR (1) FR829450A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE476038A (en) * 1944-12-26
FR996042A (en) * 1945-04-14 1951-12-12 Development of pulse signalers
BE478607A (en) * 1945-12-20
FR928242A (en) * 1946-05-18 1947-11-21 Materiel Telephonique Electrical signaling systems
FR961481A (en) * 1947-02-21 1950-05-12
NL72570C (en) * 1949-09-02
NL84411C (en) * 1950-03-08
NL80725C (en) * 1950-03-17
US2951973A (en) * 1957-08-28 1960-09-06 Duane E Atkinson Signalling system
US3090838A (en) * 1958-04-15 1963-05-21 Westrex Company Ltd Selective signaling system
US3341815A (en) * 1962-12-31 1967-09-12 Bunker Ramo Frequency responsive receiving system with noise prevention

Also Published As

Publication number Publication date
US2145053A (en) 1939-01-24

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