GB479668A - Improvements in or relating to telephone or like transmission systems - Google Patents

Improvements in or relating to telephone or like transmission systems

Info

Publication number
GB479668A
GB479668A GB21189/37A GB2118937A GB479668A GB 479668 A GB479668 A GB 479668A GB 21189/37 A GB21189/37 A GB 21189/37A GB 2118937 A GB2118937 A GB 2118937A GB 479668 A GB479668 A GB 479668A
Authority
GB
United Kingdom
Prior art keywords
resistances
relay
constant
pilot current
bridge
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
GB21189/37A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB479668A publication Critical patent/GB479668A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/10—Control of transmission; Equalising by pilot signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Networks Using Active Elements (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Thermistors And Varistors (AREA)
GB21189/37A 1936-09-16 1937-07-30 Improvements in or relating to telephone or like transmission systems Expired GB479668A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US101058A US2126529A (en) 1936-09-16 1936-09-16 Transmission system

Publications (1)

Publication Number Publication Date
GB479668A true GB479668A (en) 1938-02-09

Family

ID=22282885

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21189/37A Expired GB479668A (en) 1936-09-16 1937-07-30 Improvements in or relating to telephone or like transmission systems

Country Status (5)

Country Link
US (1) US2126529A (en:Method)
CH (1) CH209243A (en:Method)
FR (1) FR826794A (en:Method)
GB (1) GB479668A (en:Method)
NL (1) NL47983C (en:Method)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2625606A (en) * 1947-11-25 1953-01-13 Bell Telephone Labor Inc Thermistor control circuit
US2994741A (en) * 1957-12-19 1961-08-01 Kallsson Bengt Erik Lennart Signal transmitting repeater

Also Published As

Publication number Publication date
US2126529A (en) 1938-08-09
FR826794A (fr) 1938-04-08
NL47983C (en:Method)
CH209243A (de) 1940-03-31

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