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FR842319A - Appareils de signalisation - Google Patents

Appareils de signalisation

Info

Publication number
FR842319A
FR842319A FR842319DA FR842319A FR 842319 A FR842319 A FR 842319A FR 842319D A FR842319D A FR 842319DA FR 842319 A FR842319 A FR 842319A
Authority
FR
France
Prior art keywords
signaling devices
signaling
devices
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
English (en)
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR842319A publication Critical patent/FR842319A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/14—Arrangements providing for calling or supervisory signals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/14—Solid thermionic cathodes characterised by the material
    • 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)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
FR842319D 1937-08-20 1938-08-19 Appareils de signalisation Expired FR842319A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2290337A GB501028A (en) 1937-08-20 1937-08-20 Improvements in or relating to electric signalling systems

Publications (1)

Publication Number Publication Date
FR842319A true FR842319A (fr) 1939-06-09

Family

ID=10186920

Family Applications (1)

Application Number Title Priority Date Filing Date
FR842319D Expired FR842319A (fr) 1937-08-20 1938-08-19 Appareils de signalisation

Country Status (3)

Country Link
FR (1) FR842319A (de)
GB (1) GB501028A (de)
NL (1) NL50376C (de)

Also Published As

Publication number Publication date
NL50376C (de)
GB501028A (en) 1939-02-20

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