GB444858A - Improvements in or relating to electric communication cables - Google Patents

Improvements in or relating to electric communication cables

Info

Publication number
GB444858A
GB444858A GB1593335A GB1593335A GB444858A GB 444858 A GB444858 A GB 444858A GB 1593335 A GB1593335 A GB 1593335A GB 1593335 A GB1593335 A GB 1593335A GB 444858 A GB444858 A GB 444858A
Authority
GB
United Kingdom
Prior art keywords
circuits
conductors
heyes
inductance
outer circuits
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
GB1593335A
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 GB444858A publication Critical patent/GB444858A/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

Landscapes

  • Communication Cables (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

444,858. Cables. STANDARD TELEPHONES & CABLES, Ltd., and SMITH, A. G., 63, Aldwych, London. May 31, 1935, No. 15933. Drawings to Specification. [Class 36] In a metal-sheathed multi-conductor highfrequency communication cable the influence of the metal sheath on the outer circuits of the cable is compensated by employing in the circuits adjacent the sheath conductors whose direct current resistance is lower than that of the conductors of the inner circuits by such an amount that at a specified frequency within the range of frequencies over which the cable operates the alternating current resistances of the inner and outer circuits are substantially equal. The compensation is preferably effected by making the conductors of the outer circuits of larger diameter than the conductors of the inner circuits so as to increase the inductance of the outer circuits, but compensation may also be effected by the use of conductors of different conductivity for the inner and outer circuits. 444,880. Indicating faults; inductance measurements. HEYES & CO., Ltd., and HEYES, W. A., Water-Heyes Road, Wigan. June 30, 1934, No. 19345. [Class 37] Apparatus for testing inductance values of transformers, coils or bell windings employed in mines comprises an induction coil 2 having its secondary connected to a milliammeter 5 and to flexible test terminals 6, 7, a coil 8 of predetermined inductance value being connected in circuit at will for the purpose of checking the reading of the meter with a given battery potential. The meter may be calibrated in henrys.
GB1593335A 1935-03-01 1935-05-31 Improvements in or relating to electric communication cables Expired GB444858A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB653235A GB453124A (en) 1935-03-01 1935-03-01 Improvements in or relating to multi-conductor electric telephone cables for carrier current communication

Publications (1)

Publication Number Publication Date
GB444858A true GB444858A (en) 1936-03-30

Family

ID=9816213

Family Applications (3)

Application Number Title Priority Date Filing Date
GB653235A Expired GB453124A (en) 1935-03-01 1935-03-01 Improvements in or relating to multi-conductor electric telephone cables for carrier current communication
GB1650636A Expired GB453198A (en) 1935-03-01 1935-03-01 Improvements in or relating to multi-conductor electric telephone cables for carrier current communication
GB1593335A Expired GB444858A (en) 1935-03-01 1935-05-31 Improvements in or relating to electric communication cables

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB653235A Expired GB453124A (en) 1935-03-01 1935-03-01 Improvements in or relating to multi-conductor electric telephone cables for carrier current communication
GB1650636A Expired GB453198A (en) 1935-03-01 1935-03-01 Improvements in or relating to multi-conductor electric telephone cables for carrier current communication

Country Status (5)

Country Link
BE (1) BE414036A (en)
DE (2) DE737752C (en)
FR (1) FR804751A (en)
GB (3) GB453124A (en)
NL (1) NL42997C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102915811A (en) * 2011-08-04 2013-02-06 江苏中辰电缆有限公司 Sonar signal control flexile cable with high electromagnetic-interference resistance

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE749482C (en) * 1937-09-07 1945-01-12 Telecommunication cable with symmetrically stranded wire groups for the transmission of higher frequencies
DE976191C (en) * 1951-05-30 1963-04-25 Siemens Ag Multi-layer carrier frequency telecommunication cable
DE2939171C2 (en) * 1979-09-27 1981-08-20 Siemens AG, 1000 Berlin und 8000 München Cable made up of three bundles with three cores each
US4522083A (en) * 1980-11-28 1985-06-11 Morgan Clyde R Bicycle handlebar grips

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102915811A (en) * 2011-08-04 2013-02-06 江苏中辰电缆有限公司 Sonar signal control flexile cable with high electromagnetic-interference resistance

Also Published As

Publication number Publication date
GB453198A (en) 1936-09-01
DE673672C (en) 1939-03-25
DE737752C (en) 1943-07-22
GB453124A (en) 1936-09-01
BE414036A (en)
NL42997C (en)
FR804751A (en) 1936-11-02

Similar Documents

Publication Publication Date Title
US3076931A (en) Apparatus for identifying and phasing electrical conductors
US2170813A (en) Apparatus for determining insulating values
US1905412A (en) Method of testing
US2307499A (en) Insulator testing
GB444858A (en) Improvements in or relating to electric communication cables
US2333532A (en) Insulation testing equipment
US2206416A (en) Differential electrical meter
Harrold et al. Corona location in transformers by radio frequency spectrum analysis, Part I: theory
US1586962A (en) Induction apparatus
Schurig et al. Losses in armored single-conductor lead-covered ac. cables
US1501576A (en) Electrical testing system
CN108196130A (en) The dielectric loss test method and device of comparison current signal are acquired using resitstance voltage divider
US1967911A (en) High voltage temperature measuring apparatus
SU741162A1 (en) Ac transformer bridge for remote measurements
GB246963A (en) A method and means for measuring electrical quantities
Lee Testing high-tension impregnated paper-insulated, lead-covered cable
US1775686A (en) Measuring resistance of ground connections
Camilli et al. Surge protectors for current transformers
Knight et al. Current probes for differential mode conducted emission measurement
GB372400A (en) Improvements relating to telephone instrument circuits
Spracklen et al. Condenser-Type Bushing Used With Synchronizing Equipment
GB171470A (en) Method and means for determining the transmission equivalent of an electrical circuit
RU1822987C (en) Device for measuring coupling impedance of cylindrical screen
GB591725A (en) Means for locating earth faults or the like in electrical cables or conductors
GB404015A (en) Improvements in and relating to multi-range electrical measuring instruments