GB351491A - Improvements in or relating to electric cables - Google Patents

Improvements in or relating to electric cables

Info

Publication number
GB351491A
GB351491A GB9643/30A GB964330A GB351491A GB 351491 A GB351491 A GB 351491A GB 9643/30 A GB9643/30 A GB 9643/30A GB 964330 A GB964330 A GB 964330A GB 351491 A GB351491 A GB 351491A
Authority
GB
United Kingdom
Prior art keywords
shield
conductors
conductivity
order
cables
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
GB9643/30A
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 GB351491A publication Critical patent/GB351491A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/08—Screens specially adapted for reducing cross-talk

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

351,491. Cables. STANDARD TELEPHONES & CABLES, Ltd., Columbia House, Aldwych, London.-(Assignees of Nyquist, H.; Marion Avenue, Millburn, New Jersey, U.S.A.) March 26, 1930, No. 9643. Convention date, July 20, 1929. Drawings to Specification. [Class 36.] In order to reduce far-end cross talk in a multiconductor telephone cable for two-way working, the conductors of the two speech directions are arranged in separate concentric cylindrical groups separated by a shield of magnetic and conductive material. The shield, which comprises several layers of thin wide tape applied helically with a short pitch about the inner group of conductors, is formed of a material, such as soft iron, having a high product of permeability and conductivity, and a ratio of permeability to conductivity substantially different from that of the conductors. In order to increase the conductivity of the shield, the magnetic tape may be coated with a layer of highly conductive material such as tin, zinc, copper, lead, silver, gold, nickel or chromium. The coating may be applied only to the overlapping portions of successive helices. In order to avoid magnetization of the shield due to longitudinal currents, the shield may be insulated from earth at the terminals of a repeater section.
GB9643/30A 1929-07-20 1930-03-26 Improvements in or relating to electric cables Expired GB351491A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US379842A US1871906A (en) 1929-07-20 1929-07-20 Concentric shield for cables

Publications (1)

Publication Number Publication Date
GB351491A true GB351491A (en) 1931-06-26

Family

ID=23498934

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9643/30A Expired GB351491A (en) 1929-07-20 1930-03-26 Improvements in or relating to electric cables

Country Status (2)

Country Link
US (1) US1871906A (en)
GB (1) GB351491A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2518271A (en) * 1945-02-07 1950-08-08 Telecommunications Sa Device for reduction of cross talk between two coaxial pairs of a telephone cable
US2526942A (en) * 1946-04-15 1950-10-24 Telecommunications Sa Process for reducing the far-end crosstalk between concentric pairs due to tertiary circuits
US3215768A (en) * 1963-09-23 1965-11-02 Northrop Corp Flexible wire and cable shielding
US4510346A (en) * 1983-09-30 1985-04-09 At&T Bell Laboratories Shielded cable
JP2007096269A (en) * 2005-08-30 2007-04-12 Nisca Corp Near field electromagnetic wave absorber

Also Published As

Publication number Publication date
US1871906A (en) 1932-08-16

Similar Documents

Publication Publication Date Title
GB937851A (en) Combination power and communication cable
GB999424A (en) Enamel strand conductor for pipe type cable
GB351491A (en) Improvements in or relating to electric cables
US1903975A (en) Submarine signaling cable
GB389190A (en) Extensible electric conductors
US1904873A (en) Electric cable
GB354734A (en) Improvements in or relating to submarine signalling cables
GB360921A (en) Improvements in or relating to electric cables
GB380516A (en) An improved wire for use in establishing electrical connections in electrical apparatus, such as wireless receiving sets and the like
GB626164A (en) Improvements in and relating to electrical conductors
GB771295A (en) Improvements in or relating to telecommunication cables
GB253485A (en) Improved single core cable
GB406705A (en) Improvements in or relating to co-axial electric conductor systems
GB261018A (en) Improvements in and relating to flexible conductors
GB291626A (en) Improvements relating to multiple core electric cables
GB357657A (en)
GB336320A (en) Improvements in electric cables
GB360933A (en) Loading structure for an electric signalling conductor
GB733178A (en) Improvements in and relating to electric cables
GB267609A (en) Improvements in flexible conductors
GB291030A (en) Improvements in telephone cables
GB367145A (en) Improvements relating to insulated electric conductors
ES238935U (en) Double coaxial cable display for interconnection of telecommunication transmitter equipment (Machine-translation by Google Translate, not legally binding)
ES250651A3 (en) Procedure for the manufacture of current conductor cables (Machine-translation by Google Translate, not legally binding)
GB334553A (en) Improvements in submarine cable conductors