EP0499170A1 - Low-current electrical cable-cord - Google Patents
Low-current electrical cable-cord Download PDFInfo
- Publication number
- EP0499170A1 EP0499170A1 EP92102178A EP92102178A EP0499170A1 EP 0499170 A1 EP0499170 A1 EP 0499170A1 EP 92102178 A EP92102178 A EP 92102178A EP 92102178 A EP92102178 A EP 92102178A EP 0499170 A1 EP0499170 A1 EP 0499170A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cord
- copper
- cadmium
- low
- conductor
- 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.)
- Granted
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000010949 copper Substances 0.000 claims abstract description 13
- 239000004020 conductor Substances 0.000 claims abstract description 12
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910001128 Sn alloy Inorganic materials 0.000 claims abstract description 6
- 229910000925 Cd alloy Inorganic materials 0.000 claims abstract description 5
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052793 cadmium Inorganic materials 0.000 claims description 2
- 229910052718 tin Inorganic materials 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- BEJYXUYDYXIFKH-UHFFFAOYSA-N [Cu].[Cd].[Sn] Chemical compound [Cu].[Cd].[Sn] BEJYXUYDYXIFKH-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0009—Details relating to the conductive cores
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/06—Extensible conductors or cables, e.g. self-coiling cords
- H01B7/065—Extensible conductors or cables, e.g. self-coiling cords having the shape of an helix
Definitions
- the present invention relates to an electric cable cord for low currents, in particular for telephone sets.
- Cords for low-intensity electrical cables such as telephone extension cords, are generally coiled. They must undergo without degradation of their mechanical characteristics a very large number of maneuvers, implying a stretching of the turns and tensile and bending stresses at the place of their exits from the base and from the telephone set earpiece. These cords are currently formed by an assembly of fine strands of twisted copper, so as to have sufficient electrical conductivity. Such cords do not, however, exhibit entirely satisfactory resistance to fatigue.
- the object of the present invention is to provide a cord of electric cable for low currents, which has an improved fatigue resistance compared to that of known cords, and of small diameter, size and weight, while having conductivity. sufficient electrical power.
- the electric cable cord according to the invention is characterized in that its conductor consists of several strands of very small diameter made of copper, cadmium and tin alloy, and several strands of very small diameter of hard tinned copper.
- the alloy of copper, cadmium and tin is preferably the alloy comprising by weight approximately 98.5% of copper, 1% of cadmium and 0.5% of tin, sometimes called, moreover improperly, "telephone bronze".
- This alloy has an electrical conductivity of 85% to 95% of that of pure copper.
- the diameter of the strands is on the order of 0.1mm.
- This conductor is formed by a strand of 4 strands 1 of 0.12 mm in diameter, made of copper-cadmium-tin alloy defined above, and of 3 strands 2 of 0.12 mm in diameter, of hard tinned copper.
- This cord conductor has an overall diameter of 4.5 mm.
- a bead comprising this conductor has very good resistance to fatigue tests, both with regard to the elasticity of its turns and its resistance to traction and bending. It advantageously replaces from this point of view a conductor cord formed of copper strands and of its conductor diameter of 7 mm, and allows a significant reduction in the diameter of the turns, substantially of the same order as that of the conductor diameters.
Landscapes
- Conductive Materials (AREA)
- Non-Insulated Conductors (AREA)
- Insulated Conductors (AREA)
Abstract
Description
La présente invention concerne un cordon de câble électrique pour faibles intensités, notamment pour postes téléphoniques.The present invention relates to an electric cable cord for low currents, in particular for telephone sets.
Les cordons de câble électrique pour faibles intensités, tels que les cordons du poste téléphonique, sont en général spiralés. Ils doivent subir sans dégradation de leurs caractéristiques mécaniques un très grand nombre de manoeuvres, impliquant un étirement des spires et des contraintes de traction et de flexion à l'endroit de leurs sorties du socle et de l'écouteur du poste téléphonique. Ces cordons sont formés actuellement par un assemblage de fins brins de cuivre toronnés, de façon à présenter une conductibilité électrique suffisante. De tels cordons ne présentent cependant pas une résistance à la fatigue tout à fait satisfaisante. Au bout d'un certain temps de service leurs spirales ne reviennent plus complètement à leur état initial, et les cordons sont parfois sujets à des ruptures au niveau de leurs sorties du poste téléphonique, de sorte que l'on a augmenté le diamètre ou le nombre de leurs brins largement au-delà de ce qui serait strictement nécessaire au point de vue de la conductibilité électrique requise. Ceci entraîne une augmentation corrélative de leur encombrement et de leur poids.Cords for low-intensity electrical cables, such as telephone extension cords, are generally coiled. They must undergo without degradation of their mechanical characteristics a very large number of maneuvers, implying a stretching of the turns and tensile and bending stresses at the place of their exits from the base and from the telephone set earpiece. These cords are currently formed by an assembly of fine strands of twisted copper, so as to have sufficient electrical conductivity. Such cords do not, however, exhibit entirely satisfactory resistance to fatigue. After a certain period of service their spirals no longer return completely to their initial state, and the cords are sometimes subject to breaks at their level with their exits from the telephone set, so that the diameter or the number of their strands far beyond what would be strictly necessary from the point of view of the required electrical conductivity. This results in a corresponding increase in their size and their weight.
La présente invention a pour but de procurer un cordon de câble électrique pour faibles intensités, qui présente une résistance à la fatigue améliorée par rapport à celle des cordons connus, et de diamètre, d'encombrement et de poids faibles, tout en présentant une conductibilité électrique suffisante.The object of the present invention is to provide a cord of electric cable for low currents, which has an improved fatigue resistance compared to that of known cords, and of small diameter, size and weight, while having conductivity. sufficient electrical power.
Le cordon de câble électrique selon l'invention est caractérisé en ce que son conducteur se compose de plusieurs brins de très faible diamètre en alliage de cuivre, de cadmium et d'étain, et de plusieurs brins de très faible diamètre en cuivre étamé dur.The electric cable cord according to the invention is characterized in that its conductor consists of several strands of very small diameter made of copper, cadmium and tin alloy, and several strands of very small diameter of hard tinned copper.
L'alliage de cuivre, de cadmium et d'étain est de préférence l'alliage comprenant en poids environ 98,5% de cuivre, 1% de cadmium et 0,5% d'étain, parfois appelé, d'ailleurs improprement, "bronze téléphonique". Cet alliage possède une conductibilité électrique de 85% à 95% de celle du cuivre pur.The alloy of copper, cadmium and tin is preferably the alloy comprising by weight approximately 98.5% of copper, 1% of cadmium and 0.5% of tin, sometimes called, moreover improperly, "telephone bronze". This alloy has an electrical conductivity of 85% to 95% of that of pure copper.
Pour les applications téléphoniques, le diamètre des brins est de l'ordre de 0,1mm.For telephone applications, the diameter of the strands is on the order of 0.1mm.
L'invention est décrite ci-après à titre d'exemple en regard de la figure unique du dessin ci-annexé, représentant en coupe un conducteur de cordon de radio-téléphone selon l'invention.The invention is described below by way of example with reference to the single figure of the appended drawing, showing in section a radio telephone cord conductor according to the invention.
Ce conducteur est formé par un toron de 4 brins 1 de 0,12mm de diamètre, en alliage cuivre-cadmium-étain défini ci-dessus, et de 3 brins 2 de 0,12mm de diamètre, en cuivre étamé dur.This conductor is formed by a strand of 4
Ces brins 1 et 2 sont revêtus d'une gaine isolante individuelle 3 et sont recouverts d'une gaine extérieure de protection 4, entourant l'ensemble. Ce conducteur de cordon est de diamètre global de 4,5 mm.These
Un cordon comportant ce conducteur présente une très bonne tenue aux essais de fatigue, tant en ce qui concerne l'élasticité de ses spires que sa résistance à la traction et à la flexion. Il remplace avantageusement à ce point de vue un cordon à conducteur formé de brins de cuivre et de diamètre de son conducteur de 7 mm, et permet une réduction importante du diamètre des spires, sensiblement du même ordre que celle des diamètres de conducteur.A bead comprising this conductor has very good resistance to fatigue tests, both with regard to the elasticity of its turns and its resistance to traction and bending. It advantageously replaces from this point of view a conductor cord formed of copper strands and of its conductor diameter of 7 mm, and allows a significant reduction in the diameter of the turns, substantially of the same order as that of the conductor diameters.
Sa conductibilité électrique, bien que inférieure à celle du conducteur à brins de cuivre, reste satisfaisante.Its electrical conductivity, although lower than that of the copper stranded conductor, remains satisfactory.
On a vérifié l'isolement du cordon téléphonique spiralé à toron mixte selon l'invention en le soumettant à un courant d'un ampère dans 4 conducteurs pendant 1 heure à 55°C. Les mesures sous une tension de 200 volts, après une minute de mise sous tension, ont permis de relever les valeurs de résistance d'isolement suivantes :
- A 20°C, avant l'essai, résistance 7 à 9.10⁶ mégohms
- A 55°C, en début d'essai, 10⁶ mégohms
- Après 1h à 55°C et 1 ampère dans 4 fils : 10⁶ mégohms
- Après 10 étirements à 55°C : 10⁶ mégohms
- Après 12h à 20°C : 3 à 4.10⁶ mégohms
- Après 10 étirements à 20°C : 3 à 4.10⁶ mégohms.
- At 20 ° C, before the test, resistance 7 to 9.10⁶ megohms
- At 55 ° C, at the start of the test, 10⁶ megohms
- After 1 hour at 55 ° C and 1 amp in 4 wires: 10⁶ megohms
- After 10 stretches at 55 ° C: 10⁶ megohms
- After 12h at 20 ° C: 3 to 4.10⁶ megohms
- After 10 stretches at 20 ° C: 3 to 4.10⁶ megohms.
Ces mesures montrent clairement que le cordon supporte sans perte de qualité un courant de 1A par fil sous une température de 55°C.These measurements clearly show that the cord withstands without loss of quality a current of 1A per wire at a temperature of 55 ° C.
Claims (2)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9101537 | 1991-02-11 | ||
| FR9101537A FR2672723B1 (en) | 1991-02-11 | 1991-02-11 | ELECTRIC CABLE CORD FOR LOW CURRENCIES. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0499170A1 true EP0499170A1 (en) | 1992-08-19 |
| EP0499170B1 EP0499170B1 (en) | 1996-01-31 |
Family
ID=9409563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19920102178 Expired - Lifetime EP0499170B1 (en) | 1991-02-11 | 1992-02-10 | Low-current electrical cable-cord |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0499170B1 (en) |
| AU (1) | AU650093B2 (en) |
| DE (1) | DE69207925T2 (en) |
| ES (1) | ES2083000T3 (en) |
| FR (1) | FR2672723B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2958785A1 (en) * | 2010-04-08 | 2011-10-14 | Nexans | Electric cable e.g. electric control cable, for transmitting current in automobile industry, has copper wires and tin/copper alloy wires twisted to form strand, where section of wires and percentage of tin are defined by specific equations |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012101308A1 (en) * | 2011-01-24 | 2012-08-02 | La Farga Lacambra, S.A.U. | Electrical conductor for transporting electrical energy and corresponding production method |
| ES2377925B1 (en) * | 2011-11-24 | 2012-10-30 | La Farga Lacambra, Sau | ELECTRICAL DRIVER FOR THE TRANSPORT OF ELECTRICAL ENERGY AND CORRESPONDING MANUFACTURING PROCEDURE. |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1250789A (en) * | 1959-01-26 | 1961-01-13 | Whitney Blake Co | Retractile cord in particular for the telephone and composition for the envelope of this cord |
| US3683103A (en) * | 1971-07-07 | 1972-08-08 | J & J Equity Co | Multi-strand electrical conductor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA985384A (en) * | 1973-10-09 | 1976-03-09 | Northern Electric Company Limited | Flexible electrical conductors |
-
1991
- 1991-02-11 FR FR9101537A patent/FR2672723B1/en not_active Expired - Fee Related
-
1992
- 1992-02-04 AU AU10720/92A patent/AU650093B2/en not_active Ceased
- 1992-02-10 ES ES92102178T patent/ES2083000T3/en not_active Expired - Lifetime
- 1992-02-10 EP EP19920102178 patent/EP0499170B1/en not_active Expired - Lifetime
- 1992-02-10 DE DE1992607925 patent/DE69207925T2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1250789A (en) * | 1959-01-26 | 1961-01-13 | Whitney Blake Co | Retractile cord in particular for the telephone and composition for the envelope of this cord |
| US3683103A (en) * | 1971-07-07 | 1972-08-08 | J & J Equity Co | Multi-strand electrical conductor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2958785A1 (en) * | 2010-04-08 | 2011-10-14 | Nexans | Electric cable e.g. electric control cable, for transmitting current in automobile industry, has copper wires and tin/copper alloy wires twisted to form strand, where section of wires and percentage of tin are defined by specific equations |
Also Published As
| Publication number | Publication date |
|---|---|
| AU1072092A (en) | 1992-08-13 |
| EP0499170B1 (en) | 1996-01-31 |
| DE69207925T2 (en) | 1996-06-05 |
| AU650093B2 (en) | 1994-06-09 |
| ES2083000T3 (en) | 1996-04-01 |
| FR2672723B1 (en) | 1993-04-16 |
| FR2672723A1 (en) | 1992-08-14 |
| DE69207925D1 (en) | 1996-03-14 |
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