US3751619A - Electrical contact structure of the plug-and-socket type circuit breakers - Google Patents

Electrical contact structure of the plug-and-socket type circuit breakers Download PDF

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Publication number
US3751619A
US3751619A US00264512A US3751619DA US3751619A US 3751619 A US3751619 A US 3751619A US 00264512 A US00264512 A US 00264512A US 3751619D A US3751619D A US 3751619DA US 3751619 A US3751619 A US 3751619A
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US
United States
Prior art keywords
contact
plug
socket
contact member
finger
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 - Lifetime
Application number
US00264512A
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English (en)
Inventor
A Niederer
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
Bbc Brown Boveri & Cie
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 Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
Application granted granted Critical
Publication of US3751619A publication Critical patent/US3751619A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/38—Plug-and-socket contacts
    • 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
    • H01R13/15—Pins, blades or sockets having separate spring member for producing or increasing contact pressure
    • H01R13/18—Pins, blades or sockets having separate spring member for producing or increasing contact pressure with the spring member surrounding the socket

Definitions

  • ABSTRACT 30 Foreign Application Priority Data July 1, 1971 Switzerland .1 9660/71
  • a plug-and-socket type of electrical contact structure designed for handling high currents includes a contact 52 us. (:1 200/166 BH, 339/258 R p having a spherically Shaped head adapted to enter 51 Int. Cl.
  • the present invention relates to an improvement in a separable electrical contact structures designed for handling high current, and more particularly to separa ble structures of the plug and socket type wherein a contact plug operates in conjunction with a socket formed by a cylindric tulip-like assembly of oblong lamellar contact fingers.
  • the principal object of the present invention is to provide an improved construction for a tulip-formed socket and plug connection of the general type as described above wherein very little relative movement occurs between the parts to be connected by the lamellar contact strips or fingers either during opening or closing of the plug in contact apparatus.
  • the individual contact finger units each consist of an essentially rigid contact finger preferably drawn copper having an elastic contact strip secured to and extending along one side thereof to effect a springlike engagement with a surface of the cylindric conductive housing within which the cylindric assembly of contact finger units is supported when the contact plug is entered into the contact finger units and engages the other sides of the essentially rigid contact fingers in such manner as to urge them in a radially outward direction, the current being transferred from the contact plug to the conductive housing through the cylindric assembly of contact finger units supported therein.
  • Mounting of the contact finger units to establish the cylindric assembly is accomplished by pins projecting from opposite ends of the finger units which are loosely fitted in complementary circumferentially spaced bores provided in support rings which are mounted in the conductive housing.
  • FIG. 1 is a view essentially in diametral section through those portions of the contact structure where contact is made between the end of the contact plug and the cylindric tulip-type socket assembly of contact fingers;
  • FIG. 2 is a view in perspective illustrating the detailed structure of one of the contact fingers and the associated arcuate resilient contact strip by which resilient contact is established between the contact finger unit and the inner cylindrical surface of the housing accomodating the contact finger units as the contact plug enters and presses radially outward against them.
  • the electrical contact structure of the circuit breaker is seen to include a contact plug 1 terminating in a spherically surfaced head la which is designed to enter and establish electrical with a complementary contact socket 3 having a tubular cylindrical configuration.
  • the desired electrical contact between these two contact members is established in a pressurized manner through a cylindric assembly of circumferentially spaced, radially displaceable socket finger units mounted within the stationary contact member 3.
  • Each of these contact finger units is constituted by a two-part structure, one part being an essentially rigid contact finger 2 preferably made from drawn copper and which is provided with a pin 4 projecting from each end.
  • the front side of the contact finger 2 consists of two identical plane surfaced parts 2b, 2c arranged at an obtuse angle approaching which intersect along a longitudinal center line of the finger, and this front side is adapted to be engaged by the bulbous head 1a of the plug contact.
  • the back side of contact finger 2 is provided along each edge portion thereof with a longitudinally extending grove 2a, these grooves being provided to receive the flanged edges 6a of a lamellar contact strip 6, thereby to hold the contact strip frictionally in place at the back side of the finger 2.
  • Each metallic contact strip 6 is so configured that part of the strip stands away from the back side of the contact finger to provide a space therebetween which establishes a springy characteristic that enables the strip to yield elastically as contact pressure is developed by insertion of head Ia of the pin contact and, as shown in FIG. 2, strip 6 may be provided with a series of longitudinally spaced transversely extending slits establishing offset portions for this purpose.
  • the pins 4 projecting from opposite ends of the contact fingers 2 are received by and loosely fitted in circumferentially spaced bores 5a provided in support rings 5, 5' that are mounted within the socket member 3.
  • the assembly of the contact finger units and support rings therefor are held in place within socket member 3 by a retaining ring 7 located near the mouth of socket member 3 at the entry point of the plug contact which engages support ring 5, the other support ring 5' being stopped by contact with an internal shoulder 30 of socket member 3.
  • the two When it is desired to establish electrical contact between the contact members 1 and 3, the two are brought together such that the bulbous head la of the plug contact is entered into the mouth of tubular contact member 3 and into the cylindric assembly of contact finger units 2, 6 creating on the latter a radially outward pressure which causes the finger units to be displaced in a radially outward direction limited by the extent of the travel permitted by the loose fit of the pins 4 in their bores'Sa so that the springy lamellar contact strips 6 are pressed elastically against the inner cylindrical surface of contact member 3, thus producing the contact pressure necessary for transfer of the current through the contact fingers from one to the other of the plug and socket contact members 1,3.
  • the improved contact arrangement is able to absorb forces in an axial as well as in a radial direction while under load current and will tolerate axial displacement between the contact members.
  • the contact arrangement will also tolerate relative rotation between the contact memhers I claim:
  • a separable electrical contact structure of the plug-and-socket type for handling high currents comprising a cylindrical plug contact member, a complementary cylindrical socket contact member into which the end portion of said plug contact member is entered, a cylindric assembly of circumferentially spaced contact finger units each of which includes an essentially rigid contact finger having one side thereof engageable by said end portion of said plug contact member and a resilient lamellar contact strip secured to the opposite side thereof, and means mounting said cylindric assembly of contact finger units ineluding a pair of spaced supporting rings located within said socket contact member, each of said supporting rings being provided with circumferentially spaced bores loosely receiving support pins projecting from the opposite ends of said contact fingers thereby to permit forced movement of said contact fingers in a radially outward direction when engaged by said end portion of said plug contact member and establishment of a corresponding pressurized contact between the said resilient contact strips on said contact fingers and the adjacent surface portions of said socket contact memher.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Breakers (AREA)
US00264512A 1971-07-01 1972-06-20 Electrical contact structure of the plug-and-socket type circuit breakers Expired - Lifetime US3751619A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH966071A CH533351A (de) 1971-07-01 1971-07-01 Elektrische Kontaktvorrichtung für hohe Ströme

Publications (1)

Publication Number Publication Date
US3751619A true US3751619A (en) 1973-08-07

Family

ID=4354312

Family Applications (1)

Application Number Title Priority Date Filing Date
US00264512A Expired - Lifetime US3751619A (en) 1971-07-01 1972-06-20 Electrical contact structure of the plug-and-socket type circuit breakers

Country Status (7)

Country Link
US (1) US3751619A (cg-RX-API-DMAC10.html)
CA (1) CA960269A (cg-RX-API-DMAC10.html)
CH (1) CH533351A (cg-RX-API-DMAC10.html)
DE (2) DE2138989A1 (cg-RX-API-DMAC10.html)
FR (1) FR2143810B3 (cg-RX-API-DMAC10.html)
GB (1) GB1372279A (cg-RX-API-DMAC10.html)
IT (1) IT956894B (cg-RX-API-DMAC10.html)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100093234A1 (en) * 2006-11-06 2010-04-15 Christian Lang Electrical contact configuration
CN104051183A (zh) * 2014-05-30 2014-09-17 国家电网公司 一种具有闭合自保持功能的真空灭弧室

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4191445A (en) * 1976-01-16 1980-03-04 Multilam Corporation Louvered electrical connector
CH595686A5 (cg-RX-API-DMAC10.html) * 1976-02-06 1978-02-28 Bbc Brown Boveri & Cie
US4082410A (en) * 1976-05-06 1978-04-04 Amerace Corporation Electrical connectors and contact assemblies therefor
DE3211758A1 (de) * 1982-03-30 1983-10-06 Siemens Ag Gehaeuse fuer die elektrische nachrichtentechnik
GB8417646D0 (en) * 1984-07-11 1984-08-15 Smiths Industries Plc Electrical contacts
FR2622361B1 (fr) * 1987-10-22 1991-06-14 Souriau & Cie Connecteur electrique pour le passage de courants de tres fortes intensites et de courtes durees
FR2688338B1 (fr) * 1992-03-06 1997-04-04 Alsthom Gec Dispositif de contact annulaire electrique, en particulier pour disjoncteur.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2180155A (en) * 1937-05-15 1939-11-14 Gen Electric Electric contact
US3127492A (en) * 1961-05-29 1964-03-31 Mc Graw Edison Co Electric contact assemblage of contact fingers in which helically wound conductive members provide contact pressure
US3567892A (en) * 1969-04-15 1971-03-02 Coq Nv Electric switches of large power comprising axially movable switching rods and resilient annular fixed contacts which are in permanent contact with said switching rods and contact strips for such fixed contacts
US3571547A (en) * 1968-06-05 1971-03-23 Coq Nv Electric current contact

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2180155A (en) * 1937-05-15 1939-11-14 Gen Electric Electric contact
US3127492A (en) * 1961-05-29 1964-03-31 Mc Graw Edison Co Electric contact assemblage of contact fingers in which helically wound conductive members provide contact pressure
US3571547A (en) * 1968-06-05 1971-03-23 Coq Nv Electric current contact
US3567892A (en) * 1969-04-15 1971-03-02 Coq Nv Electric switches of large power comprising axially movable switching rods and resilient annular fixed contacts which are in permanent contact with said switching rods and contact strips for such fixed contacts

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100093234A1 (en) * 2006-11-06 2010-04-15 Christian Lang Electrical contact configuration
US8021201B2 (en) 2006-11-06 2011-09-20 Robert Bosch Gmbh Electrical contact configuration
CN104051183A (zh) * 2014-05-30 2014-09-17 国家电网公司 一种具有闭合自保持功能的真空灭弧室

Also Published As

Publication number Publication date
CA960269A (en) 1974-12-31
DE2138989A1 (de) 1973-01-18
CH533351A (de) 1973-01-31
IT956894B (it) 1973-10-10
FR2143810B3 (cg-RX-API-DMAC10.html) 1975-08-29
DE7129887U (de) 1973-04-12
GB1372279A (en) 1974-10-30
FR2143810A1 (cg-RX-API-DMAC10.html) 1973-02-09

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