GB649470A - Improvements in or relating to signalling systems - Google Patents

Improvements in or relating to signalling systems

Info

Publication number
GB649470A
GB649470A GB20806/48A GB2080648A GB649470A GB 649470 A GB649470 A GB 649470A GB 20806/48 A GB20806/48 A GB 20806/48A GB 2080648 A GB2080648 A GB 2080648A GB 649470 A GB649470 A GB 649470A
Authority
GB
United Kingdom
Prior art keywords
contacts
valve
frequencies
over
central office
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
GB20806/48A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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
Priority claimed from US767487A external-priority patent/US2602853A/en
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB649470A publication Critical patent/GB649470A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)
  • Mobile Radio Communication Systems (AREA)
GB20806/48A 1947-08-07 1948-08-06 Improvements in or relating to signalling systems Expired GB649470A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US649470XA 1947-08-07 1947-08-07
US767487A US2602853A (en) 1947-08-07 1947-08-08 Selective signaling system

Publications (1)

Publication Number Publication Date
GB649470A true GB649470A (en) 1951-01-24

Family

ID=26745061

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20806/48A Expired GB649470A (en) 1947-08-07 1948-08-06 Improvements in or relating to signalling systems

Country Status (3)

Country Link
BE (1) BE482654A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR964887A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB649470A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1025023B (de) * 1955-01-15 1958-02-27 Deutsche Bundespost Selektivrufsystem fuer die Wahl von Fernsprechteilnehmern in Sprechfunknetzen

Also Published As

Publication number Publication date
BE482654A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR964887A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

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