FR837917A - Signaling system - Google Patents

Signaling system

Info

Publication number
FR837917A
FR837917A FR837917DA FR837917A FR 837917 A FR837917 A FR 837917A FR 837917D A FR837917D A FR 837917DA FR 837917 A FR837917 A FR 837917A
Authority
FR
France
Prior art keywords
signaling system
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.)
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 FR837917A publication Critical patent/FR837917A/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)
  • Interface Circuits In Exchanges (AREA)
FR837917D 1937-05-14 1938-05-13 Signaling system Expired FR837917A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US142619A US2138613A (en) 1937-05-14 1937-05-14 Signaling system

Publications (1)

Publication Number Publication Date
FR837917A true FR837917A (en) 1939-02-23

Family

ID=22500591

Family Applications (1)

Application Number Title Priority Date Filing Date
FR837917D Expired FR837917A (en) 1937-05-14 1938-05-13 Signaling system

Country Status (3)

Country Link
US (1) US2138613A (en)
FR (1) FR837917A (en)
GB (1) GB499103A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2923918A (en) * 1960-02-02 Adler
US2604518A (en) * 1945-11-26 1952-07-22 Norman J Oliver Radio control system receiver
BE478607A (en) * 1945-12-20
FR928242A (en) * 1946-05-18 1947-11-21 Materiel Telephonique Electrical signaling systems
BE483454A (en) * 1946-10-02

Also Published As

Publication number Publication date
US2138613A (en) 1938-11-29
GB499103A (en) 1939-01-18

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