GB497727A - Alternating current signalling or control system, applicable particularly to telephone systems - Google Patents

Alternating current signalling or control system, applicable particularly to telephone systems

Info

Publication number
GB497727A
GB497727A GB8189/37A GB818937A GB497727A GB 497727 A GB497727 A GB 497727A GB 8189/37 A GB8189/37 A GB 8189/37A GB 818937 A GB818937 A GB 818937A GB 497727 A GB497727 A GB 497727A
Authority
GB
United Kingdom
Prior art keywords
signal
signals
relay
alternating current
exchange
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
GB8189/37A
Other languages
English (en)
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.)
Compagnie des Telephones Thomson Houston
Original Assignee
Compagnie des Telephones Thomson Houston
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 Compagnie des Telephones Thomson Houston filed Critical Compagnie des Telephones Thomson Houston
Publication of GB497727A publication Critical patent/GB497727A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
GB8189/37A 1936-03-31 1937-03-19 Alternating current signalling or control system, applicable particularly to telephone systems Expired GB497727A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR497727X 1936-03-31

Publications (1)

Publication Number Publication Date
GB497727A true GB497727A (en) 1938-12-22

Family

ID=8904965

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8189/37A Expired GB497727A (en) 1936-03-31 1937-03-19 Alternating current signalling or control system, applicable particularly to telephone systems

Country Status (3)

Country Link
BE (1) BE420362A (enrdf_load_stackoverflow)
FR (1) FR815825A (enrdf_load_stackoverflow)
GB (1) GB497727A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
FR815825A (fr) 1937-07-23
BE420362A (enrdf_load_stackoverflow)

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