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FR869497A - Electrical signaling system - Google Patents

Electrical signaling system

Info

Publication number
FR869497A
FR869497A FR869497DA FR869497A FR 869497 A FR869497 A FR 869497A FR 869497D A FR869497D A FR 869497DA FR 869497 A FR869497 A FR 869497A
Authority
FR
France
Prior art keywords
signaling system
electrical signaling
electrical
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 FR869497A publication Critical patent/FR869497A/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
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Measurement Of Current Or Voltage (AREA)
FR869497D 1939-11-14 1941-01-24 Electrical signaling system Expired FR869497A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US304307A US2232866A (en) 1939-11-14 1939-11-14 Signaling system

Publications (1)

Publication Number Publication Date
FR869497A true FR869497A (en) 1942-02-03

Family

ID=23175945

Family Applications (1)

Application Number Title Priority Date Filing Date
FR869497D Expired FR869497A (en) 1939-11-14 1941-01-24 Electrical signaling system

Country Status (2)

Country Link
US (1) US2232866A (en)
FR (1) FR869497A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR997704A (en) * 1948-12-30

Also Published As

Publication number Publication date
US2232866A (en) 1941-02-25

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