GB448011A - Improved circuit arrangements for telephone or like instruments - Google Patents

Improved circuit arrangements for telephone or like instruments

Info

Publication number
GB448011A
GB448011A GB1584935A GB1584935A GB448011A GB 448011 A GB448011 A GB 448011A GB 1584935 A GB1584935 A GB 1584935A GB 1584935 A GB1584935 A GB 1584935A GB 448011 A GB448011 A GB 448011A
Authority
GB
United Kingdom
Prior art keywords
winding
circuits
instruments
telephone
circuit arrangements
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
GB1584935A
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.)
ARTHUR FREDERICK JONES
General Electric Co PLC
Original Assignee
ARTHUR FREDERICK JONES
General Electric Co 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 ARTHUR FREDERICK JONES, General Electric Co PLC filed Critical ARTHUR FREDERICK JONES
Priority to GB1584935A priority Critical patent/GB448011A/en
Publication of GB448011A publication Critical patent/GB448011A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

448,011. Substation circuits. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and JONES, A. F., c/o General Electric Co., Ltd., Stoke, Coventry. May 31, 1935, No. 15849. [Class 40 (iv)] In an anti-sidetone circuit, the transmitter 11, which is in series with one winding 1 of the transformer, is shunted by two circuits, one of relatively high resistance through the second winding 2, and the other comprising a tapped resistance 7, 8 and a condenser 6 with the receiver 9 and the third winding 3 connected across a part of the resistance. The circuits shunted across the transmitter are such as to provide a relatively low impedance path for surge currents due to switchhook operation and other causes.
GB1584935A 1935-05-31 1935-05-31 Improved circuit arrangements for telephone or like instruments Expired GB448011A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1584935A GB448011A (en) 1935-05-31 1935-05-31 Improved circuit arrangements for telephone or like instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1584935A GB448011A (en) 1935-05-31 1935-05-31 Improved circuit arrangements for telephone or like instruments

Publications (1)

Publication Number Publication Date
GB448011A true GB448011A (en) 1936-05-29

Family

ID=10066634

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1584935A Expired GB448011A (en) 1935-05-31 1935-05-31 Improved circuit arrangements for telephone or like instruments

Country Status (1)

Country Link
GB (1) GB448011A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1002398B (en) * 1954-01-07 1957-02-14 Allg Telefon Fabrik G M B H Circuit arrangement for call stations in telephone systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1002398B (en) * 1954-01-07 1957-02-14 Allg Telefon Fabrik G M B H Circuit arrangement for call stations in telephone systems

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