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

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q1/00Details of selecting apparatus or arrangements
    • H04Q1/18Electrical details
    • H04Q1/30Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465Signalling 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

Similar Documents

Publication Publication Date Title
FR833929A (en) Improvements to signaling systems
FR814713A (en) Improvements to multiple signaling systems
FR824786A (en) Improvements to ventilation systems
FR829450A (en) Improvements to signaling systems
FR747666A (en) Improvements to signaling systems
FR816135A (en) Improvements to radio signaling systems
FR825317A (en) Improvements to vehicle night signaling
FR822065A (en) Improvements to network protection systems
FR872187A (en) Improvements to electrical signaling systems
FR813641A (en) Improvements to electrical signaling systems
FR819791A (en) Improvements to telephone systems
FR754720A (en) Improvements to electrical signaling systems
FR797172A (en) Improvements to electrical signaling systems
FR842846A (en) Improvements to signaling systems
FR773796A (en) Improvements to high frequency signaling systems
FR808281A (en) Improvements to radio signaling systems
FR828387A (en) Signaling systems
FR49378E (en) Improvements to vehicle night signaling
FR830231A (en) Improvements to cooling systems
FR722045A (en) Improvements to electrical signaling systems
FR816786A (en) Improvements to electrical signaling systems
FR821478A (en) Improvements to optical signaling systems
FR827382A (en) Improvements to television systems
FR779812A (en) Improvements to electrical signaling systems
FR786537A (en) Improvements to electrical signaling systems