GB371535A - Improvements in or relating to telephone systems - Google Patents

Improvements in or relating to telephone systems

Info

Publication number
GB371535A
GB371535A GB699931A GB699931A GB371535A GB 371535 A GB371535 A GB 371535A GB 699931 A GB699931 A GB 699931A GB 699931 A GB699931 A GB 699931A GB 371535 A GB371535 A GB 371535A
Authority
GB
United Kingdom
Prior art keywords
relating
telephone systems
coventry
automatic
collyer
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
GB699931A
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.)
COVENTRY AUTOM TELEPHONES Ltd
Original Assignee
COVENTRY AUTOM TELEPHONES Ltd
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 COVENTRY AUTOM TELEPHONES Ltd filed Critical COVENTRY AUTOM TELEPHONES Ltd
Priority to GB699931A priority Critical patent/GB371535A/en
Publication of GB371535A publication Critical patent/GB371535A/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
    • H04B3/06—Control of transmission; Equalising by the transmitted signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

371,535. Automatic exchange systems. COVENTRY AUTOMATIC TELEPHONES, Ltd. and COLLYER, J. E., of General Electric Co., Stoke, Coventry.. March 6, 1931, No. 6999. [Class 40 (iv).] Impedances 23 included in a subscriber's feed circuit for local calls are cut out when an outgoing junction is selected by a relay 22 operating over a grounded terminal 18.
GB699931A 1931-03-06 1931-03-06 Improvements in or relating to telephone systems Expired GB371535A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB699931A GB371535A (en) 1931-03-06 1931-03-06 Improvements in or relating to telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB699931A GB371535A (en) 1931-03-06 1931-03-06 Improvements in or relating to telephone systems

Publications (1)

Publication Number Publication Date
GB371535A true GB371535A (en) 1932-04-28

Family

ID=9824687

Family Applications (1)

Application Number Title Priority Date Filing Date
GB699931A Expired GB371535A (en) 1931-03-06 1931-03-06 Improvements in or relating to telephone systems

Country Status (1)

Country Link
GB (1) GB371535A (en)

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