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
  • H01B11/10—Screens specially adapted for reducing interference from external sources
  • H01B11/1058—Screens specially adapted for reducing interference from external sources using a coating, e.g. a loaded polymer, ink or print
  • H01B11/1083—Screens specially adapted for reducing interference from external sources using a coating, e.g. a loaded polymer, ink or print the coating containing magnetic material

Definitions

• Figure 1 is a perspective view of a cable according to the invention.
• Figure 2 is a part-sectional view, drawn to a much enlarged scale, of the cable in Figure 1;
• Figure 3 is a perspective view of a cable according to the invention, illustrating a modified "An electric cable particularly, but not exclusively,
• This invention relates to an electric cable particularly, but not exclusively, useful with high-fidelity stereo systems and being of the type which comprises at least one conductor and a flexible shielding for protecting the conductor(s) against noise from electromagnetic waves.
• Figure 4 is a sectional view, drawn to a much enlarged scale, of the cable in Figure 3.
• an electric cable for a high-fidelity stereo system e.g. a power supply cable for connecting the system to the mains.
• the cable 1 comprises two conductors, 2 and 3, laid side-by-side into a so-called ribbon cable configuration, the conductors 2 and 3 being insulated from each other and the outside world by an insulation 4 formed from a suitable resin, e.g. from PVC.
• a suitable resin e.g. from PVC.
• the cable 1 further comprises a flexible shielding 5, to be described in greater detail hereinafter, for protecting the conductors against noise from electromagnetic waves, and an outer sheath 6 to guard the flexible shielding 5, which sheath is formed from a suitable resin, e.g. from PVC.
• the cable 1 has an outside diameter of about 10 mm.
• the flexible shielding 5 is in the form of a tubular resinous jacket 7, e.g. made of a vinyl resin.
• ferrite 8 Dispersed through the jacket 7 thickness substantial being of 1 mm, for example -- is ferrite 8 which is finely divided in particles or, in other words, powered.
• the ferrite particle size is selected to lie within the range of 0.01 to 1 mm, preferably to be of 0.5 mm.
• the ferrite is provided within the jacket 7 in a by-volume amount ranging from 10% to 90%, preferably of 60%.
• the ferrite may be dispersed through the resin as by mixing.
• an electric cable 10 e.g. a transmission cable, is shown therein which is intended for interconnecting elements of the system, such as the system amplifier and an acoustic box.
• the cable 10 comprises two conductors 11 and 12 — of which one is wire-like and the other tubular -- laid coaxially with each other into a so-called coaxial cable configuration.
• the conductors 11 and 12 are insulated from each other and the outside world by means of tubular insulations 13 and 14.
• the cable 10 also comprises a flexible shielding 15, to be described, and an outer sheath 16 guarding the flexible shielding 15.
• the flexible shielding 15 is here in the form of two tubular layers, being coaxial with each other and both indicated at 17, the thickness of each layer 17 ranging from 0.1 to 1 mm, and being preferably of 0.5 mm.
• Each layer is formed from an adhesive resin which incorporates finely divided ferrite 18 by adhesion thereto.
• the adhesive resin is a silicone resin, in this example.
• the particle size of the ferrite 18 is selected to lie between 0.01 and 0.5 mm,
• the layers 17 can be obtained by successively dipping the cable into a pool of adhesive resin and then in a bed of powdered ferrite, or alternatively, by a continuous process of adhesive resin and powdered ferrite spray application.
• the cable of this invention has shown to be advantageous in that it can transfer electric quantities with unique fidelity, to provide listening of faultless quality.
• Another advantage of the inventive cable is its simple construction, not a trivial advantage with an article which is to be mass produced.
• the cable of this invention can be manufactured in a wide range of sizes and for different quality levels from the standpoint of noise protection for its conductors, according to necessity.

Landscapes

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

Applications Claiming Priority (3)

Publications (1)

Family

ID=11371994

Family Applications (1)

Country Status (5)

Families Citing this family (4)

Family Cites Families (2)

• 1995
  • 1995-07-17 IT ITMI951542A patent/IT1275559B/it active IP Right Grant
• 1996
  • 1996-07-05 CN CN96195571A patent/CN1191038A/zh active Pending
  • 1996-07-05 AU AU64186/96A patent/AU6418696A/en not_active Abandoned
  • 1996-07-05 WO PCT/EP1996/002955 patent/WO1997004467A1/en not_active Ceased
  • 1996-07-05 EP EP96923972A patent/EP0839378A1/en not_active Withdrawn

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events