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EP0569433A1 - Conducteur electrique pour applications en commutation - Google Patents

Conducteur electrique pour applications en commutation

Info

Publication number
EP0569433A1
EP0569433A1 EP19920903767 EP92903767A EP0569433A1 EP 0569433 A1 EP0569433 A1 EP 0569433A1 EP 19920903767 EP19920903767 EP 19920903767 EP 92903767 A EP92903767 A EP 92903767A EP 0569433 A1 EP0569433 A1 EP 0569433A1
Authority
EP
European Patent Office
Prior art keywords
electrical
conductor
antimony
silver
copper
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.)
Withdrawn
Application number
EP19920903767
Other languages
German (de)
English (en)
Inventor
Robin 9 Dalston Drive Bose
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.)
Otter Controls Ltd
Original Assignee
Otter Controls Ltd
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 Otter Controls Ltd filed Critical Otter Controls Ltd
Publication of EP0569433A1 publication Critical patent/EP0569433A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material
    • H01H1/023—Composite material having a noble metal as the basic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/03—Contact members characterised by the material, e.g. plating, or coating materials

Definitions

  • This invention generally concerns improvements relating to conductors for electrical switching applications.
  • a preferred form of electrical conductor for electrical switching applications in which electrical contact to the conductor is repeatedly made and broken in use, such conductor providing excellent electrical characteristics in combination with superior wear characteristics and comprising a member formed of copper or of a copper alloy having a thermal conductivity approaching (eg. at least 90%) that of copper, said member being provided with a thick plating layer of silver and antimony.
  • an electrical conductor for electrical switching applications in which electrical contact to the conductor is repeatedly made and broken, said conductor being formed of brass and having a thick plating layer thereon of silver and antimony.
  • Figure 1 is a schematic side view, partly in section, showing an X12 element protector control as manufactured by Otter Controls Limited fitted to a water heating vessel, and showing a co-operating CS2 connector part also as manufactured by Otter Controls Limited for incorporation into the base unit of a cordless appliance, the X12 control and the CS2 connector part of the base unit being shown spaced apart from each other one above the other; and
  • Figure 2 shows the X12 control and the CS2 connector part shown in engaged condition.
  • an X12 device is designated 1 and a co-operating CS2 base unit connector part is designated 2.
  • the X12 device l is substantially as described in GB-A-2194099 with reference to Figures 3A, 3B and 3C thereof, and as shown in Figure 1 hereof is attached in conventional manner to a side wall of a schematically-illustrated water heating vessel 3.
  • the X12 device has the function of interrupting the supply of electrical power to a heating element within the vessel 3 in the event of an element overtemperature condition occurring, for example as a result of the vessel being powered without there being any water in it.
  • the X12 device 1 has live, neutral and earth terminal pins 4, 5 and 6 within a hooded or open-based socket inlet shroud 7 and incorporates within the body of the device thermally- responsive switch means for interrupting the electric circuit from the live and neutral pins 4, 5 to the vessel heating element in the event of an element overtemperature condition.
  • the physical arrangement of the terminal pins of the X12 device and of the socket inlet shroud is fully conventional and enables the vessel 3 to be used in a corded manner, if desired, with a standard 10 amp kettle type connector plug (not shown) plugged into the socket inlet shroud 7 and making contact with the terminal pins.
  • This arrangement is adapted also to enable the vessel to be used in a cordless manner with a base unit incorporating the illustrated connector part 2 as will now be described.
  • the connector part 2 comprises a moulded plastics upstand from the base part of the appliance which is shaped to mate with the socket inlet shroud 7 of the X12 device 1 when the vessel part of the appliance is set down onto the base.
  • the vessel and/or the base part of the appliance may include formations designed to ensure proper mating cf the connector part 2 with the socket inlet shroud 7 of the X12 device 1 when the vessel part is seated on the base.
  • a moulded plastics shutter 8 which is spring biassed towards a closed position by means of a coil spring 9, and three leaf-spring terminals 10, 11 and 12 which couple within the base unit 2 to the live, neutral and earth conductors of a power supply cord and are adapted to contact the live, neutral and earth terminal pins 4, 5 and 6 respectively when the vessel part 3 is seated upon the base and the shutter 8 is displaced to an open position as shown in Figure 2.
  • a preferred form of terminal pin providing excellent electrical characteristics in combination with superior wear characteristics comprises a copper pin, or a pin formed from a copper alloy having a thermal conductivity at least 90% that of copper, provided with a thick plating layer of silver and antimony, and the terminal pins 4, 5 and 6 can advantageously have this construction. If a common brass pin with a 5 micron layer of essentially pure silver plating were to be used then the life of the contact effected by the pin to the base unit connector springs would be around 1000 cycles of connection and disconnection. This may be increased to around 5000 cycles by use of a plating of 40 microns of essentially pure silver.
  • This life may further be increased by use of a pin made from copper or a high thermal conductivity copper alloy, but a side effect would be the formation of silver powder caused by abrasion of the contact surfaces which could lead to premature electrical breakdown.
  • a thick plating e.g. at least 30 microns and preferably 40 microns thickness
  • antimony typically about 1% and particularly between 0.3% and 0.7%
  • a silver antimony plating may be used to improve the performance of a brass pin, and a copper or high thermal conductivity copper alloy pin also obtains improved performance as compared to a brass pin, but the best results are obtained in accordance with the teachings of the present invention when these two improvements are combined.
  • the preferred form of terminal pin for co-operation with a base unit connector as herein described is a pin formed of copper or of a copper alloy having a thermal conductivity at least 95% and preferably 99% that of 99.95% pure copper, and having a plating layer of at least 30 microns and more preferably 40 microns thickness comprising fine silver (99.9% purity) with the addition of about 1% and more preferably between 0.3% and 0.7% of antimony.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Contacts (AREA)
  • Insulated Conductors (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Connector Housings Or Holding Contact Members (AREA)

Abstract

Les contacts électriques d'un appareil électrique sans fil peuvent être utilisés dans des opérations de commutation électrique. Afin d'augmenter leur longévité, ils sont composés de cuivre ou d'un alliage de cuivre possédant une conductivité thermique proche de celle du cuivre et sont dotés d'une couche d'argent d'épaisseur allant de 30 à 40 mum et contenant de 0,3 à 0,7 % d'antimoine.
EP19920903767 1991-01-31 1992-01-31 Conducteur electrique pour applications en commutation Withdrawn EP0569433A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB919102062A GB9102062D0 (en) 1991-01-31 1991-01-31 Improvements relating to conductors for switching applications
GB91020628 1991-01-31

Publications (1)

Publication Number Publication Date
EP0569433A1 true EP0569433A1 (fr) 1993-11-18

Family

ID=10689285

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920903767 Withdrawn EP0569433A1 (fr) 1991-01-31 1992-01-31 Conducteur electrique pour applications en commutation

Country Status (5)

Country Link
EP (1) EP0569433A1 (fr)
AU (1) AU659436B2 (fr)
CA (1) CA2101558A1 (fr)
GB (2) GB9102062D0 (fr)
WO (1) WO1992014282A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR950703219A (ko) 1992-09-02 1995-08-23 제이, 더블유, 뀌, 프리소 무선 제품용 충전장치
US6463446B1 (en) 1998-02-26 2002-10-08 Sun Microsystems, Inc. Method and apparatus for transporting behavior in an event-based distributed system
GB0218138D0 (en) * 2002-08-05 2002-09-11 Strix Ltd Electrical terminals
GB2481240B (en) 2010-06-17 2017-04-12 Otter Controls Ltd Thermally responsive electric switches
WO2013142765A1 (fr) * 2012-03-23 2013-09-26 Technic, Inc. Revêtements et connecteurs à l'argent-antimoine
JP2014182976A (ja) * 2013-03-21 2014-09-29 Enplas Corp 電気接触子及び電気部品用ソケット

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1065886A (en) * 1963-10-11 1967-04-19 Ass Elect Ind Improvements relating to vacuum-switch contacts
CH519775A (de) * 1970-03-26 1972-02-29 Siemens Ag Verfahren zum Herstellen eines heterogenen Durchdringungs-Verbundmetalls als Kontaktwerkstoff für Vakuumschalter
DE2014638A1 (de) * 1970-03-26 1971-10-14 Siemens Ag Verfahren zur Herstellung eines Zweischichten Kontaktstuckes
JPS57177988A (en) * 1981-04-24 1982-11-01 Furukawa Electric Co Ltd:The Manufacture of silver plated copper material
GB2131615B (en) * 1982-11-23 1986-10-08 Gunter Merten Electrical switch for actuation by motor vehicle doors
US4513183A (en) * 1983-05-04 1985-04-23 U.S. Plastics Corporation Gravity switch
JPS63221517A (ja) * 1987-03-09 1988-09-14 古河電気工業株式会社 電気接点材料とその製造法
DE3932536C1 (en) * 1989-09-29 1990-08-09 W.C. Heraeus Gmbh, 6450 Hanau, De Wear resistant contact material - in which is applied to support comprising copper alloy and non-noble metal contg. silver, palladium or palladium-silver alloy
EP0441536B1 (fr) * 1990-01-31 1996-10-09 Otter Controls Limited Améliorations relatives aux appareils électriques
DE4005836C2 (de) * 1990-02-23 1999-10-28 Stolberger Metallwerke Gmbh Elektrisches Steckverbinderpaar

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9214282A1 *

Also Published As

Publication number Publication date
GB9202055D0 (en) 1992-03-18
GB9102062D0 (en) 1991-03-13
CA2101558A1 (fr) 1992-08-01
AU1201892A (en) 1992-09-07
WO1992014282A1 (fr) 1992-08-20
GB2253097A (en) 1992-08-26
AU659436B2 (en) 1995-05-18
GB2253097B (en) 1995-01-18

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