FR682156A - Improvements to electrical signaling systems - Google Patents

Improvements to electrical signaling systems

Info

Publication number
FR682156A
FR682156A FR682156DA FR682156A FR 682156 A FR682156 A FR 682156A FR 682156D A FR682156D A FR 682156DA FR 682156 A FR682156 A FR 682156A
Authority
FR
France
Prior art keywords
signaling systems
electrical signaling
electrical
systems
signaling
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.)
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 FR682156A publication Critical patent/FR682156A/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
FR682156D 1929-06-25 1929-06-25 Improvements to electrical signaling systems Expired FR682156A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR682156T 1929-06-25

Publications (1)

Publication Number Publication Date
FR682156A true FR682156A (en) 1930-05-23

Family

ID=9023174

Family Applications (1)

Application Number Title Priority Date Filing Date
FR682156D Expired FR682156A (en) 1929-06-25 1929-06-25 Improvements to electrical signaling systems

Country Status (1)

Country Link
FR (1) FR682156A (en)

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