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GB501234A - Improvements in or relating to two-directional electric telephony systems - Google Patents

Improvements in or relating to two-directional electric telephony systems

Info

Publication number
GB501234A
GB501234A GB10433/38A GB1043338A GB501234A GB 501234 A GB501234 A GB 501234A GB 10433/38 A GB10433/38 A GB 10433/38A GB 1043338 A GB1043338 A GB 1043338A GB 501234 A GB501234 A GB 501234A
Authority
GB
United Kingdom
Prior art keywords
voltage
amplifier
line
suppressor
gli
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
GB10433/38A
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.)
Siemens and Halske AG
Siemens Corp
Original Assignee
Siemens and Halske AG
Siemens Corp
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 Siemens and Halske AG, Siemens Corp filed Critical Siemens and Halske AG
Publication of GB501234A publication Critical patent/GB501234A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Testing Relating To Insulation (AREA)
GB10433/38A 1937-04-05 1938-04-05 Improvements in or relating to two-directional electric telephony systems Expired GB501234A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202984X 1937-04-05

Publications (1)

Publication Number Publication Date
GB501234A true GB501234A (en) 1939-02-23

Family

ID=5774183

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10433/38A Expired GB501234A (en) 1937-04-05 1938-04-05 Improvements in or relating to two-directional electric telephony systems

Country Status (3)

Country Link
CH (1) CH202984A (fr)
FR (1) FR836160A (fr)
GB (1) GB501234A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2615997A (en) * 1946-12-13 1952-10-28 Kellogg Switchboard & Supply Telephone repeater

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE759529C (de) * 1940-04-26 1954-05-03 Hell Rudolf Dr Ing Rueckkopplungssperre

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2615997A (en) * 1946-12-13 1952-10-28 Kellogg Switchboard & Supply Telephone repeater

Also Published As

Publication number Publication date
CH202984A (de) 1939-02-15
FR836160A (fr) 1939-01-12

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