GB779172A - Improvements in and relating to telephone systems and the like - Google Patents

Improvements in and relating to telephone systems and the like

Info

Publication number
GB779172A
GB779172A GB4551/55A GB455155A GB779172A GB 779172 A GB779172 A GB 779172A GB 4551/55 A GB4551/55 A GB 4551/55A GB 455155 A GB455155 A GB 455155A GB 779172 A GB779172 A GB 779172A
Authority
GB
United Kingdom
Prior art keywords
gain
triode
speech
hexode
amplifying unit
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
GB4551/55A
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.)
SVENSKA RELAFABRIKEN AB
Original Assignee
SVENSKA RELAFABRIKEN AB
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 SVENSKA RELAFABRIKEN AB filed Critical SVENSKA RELAFABRIKEN AB
Publication of GB779172A publication Critical patent/GB779172A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Control Of Amplification And Gain Control (AREA)
GB4551/55A 1954-02-24 1955-02-15 Improvements in and relating to telephone systems and the like Expired GB779172A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE333371X 1954-02-24

Publications (1)

Publication Number Publication Date
GB779172A true GB779172A (en) 1957-07-17

Family

ID=20308163

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4551/55A Expired GB779172A (en) 1954-02-24 1955-02-15 Improvements in and relating to telephone systems and the like

Country Status (6)

Country Link
BE (1) BE535941A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH333371A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE1049430B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR1134321A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB779172A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL97209C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE565494A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1957-11-26 1900-01-01
DE1211271B (de) * 1961-06-08 1966-02-24 Ericsson Telefon Ab L M Schaltungsanordnung fuer eine sprachgesteuerte Gegen- oder Wechselsprechanlage mit Freisprechbetrieb
GB1011962A (en) * 1963-05-14 1965-12-01 Northern Electric Co Improvements in or relating to electrical control circuits

Also Published As

Publication number Publication date
BE535941A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR1134321A (fr) 1957-04-10
DE1049430B (de) 1959-01-29
CH333371A (de) 1958-10-15
NL97209C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

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