US3571547A - Electric current contact - Google Patents

Electric current contact Download PDF

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Publication number
US3571547A
US3571547A US830345A US3571547DA US3571547A US 3571547 A US3571547 A US 3571547A US 830345 A US830345 A US 830345A US 3571547D A US3571547D A US 3571547DA US 3571547 A US3571547 A US 3571547A
Authority
US
United States
Prior art keywords
switching rod
contact
cylindrical
strip
holder
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
US830345A
Other languages
English (en)
Inventor
Rintje Boersma
Gijsbert W Irik
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.)
COQ NV
Original Assignee
COQ NV
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 COQ NV filed Critical COQ NV
Application granted granted Critical
Publication of US3571547A publication Critical patent/US3571547A/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
    • H01H1/62—Heating or cooling of contacts
    • 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

Definitions

  • the invention relates to an electric switch comprising an axially movable switching contact and a resilient annular fixed contact which is in permanent contact with said switching contact and connects said switching contact electrically conductively with the circuit to be closed and opened by said switch.
  • the invention has for its object to provide apermanent electrically conductive connection between a terminal of the switch and the axially movable switching contact, said connection having a simple construction, requiring little space, being easy to mount, having practically no braking action on the switching contact, having no unfavorable influence on the electric field in the switch and maintaining under all circumstances that means also during operation under very large short circuit currents, a satisfactory conductive contact between the movable switching contact and the relevant stationary conductive parts of the switch.
  • this is achieved by the provision of a fixed contact which is permanently in contact with the movable switching contact and consists of a zigzag folded metal strip surrounded and supported by an annular holder, said strip being bent in the shape of a ring which snugly encloses the switching contact and has in its free state an inner diameter which is smaller than the outer diameter of the switching contact. If in this construction the switching contact is inserted in the fixed contact the parts of the zigzag folded annularly bent strip of the fixed contact are forced a little out of their free position, so that the strip contacts with its folds lying at the inner circumference thereof, with resilient pressure the switching contact.
  • said ring comes to lie with a great number of individual resilient linear contact areas against the switching contact and, under all circumstances, a favourable current transfer is obtained between the switching contact and the annularly bent strip. Owing to its zigzag shape the strip has a large cooling surface, so that the fixed contact is well cooled and can be overloaded considerably.
  • FIG. 1 partly an axial sectional view and partly an elevational view of an axially movable switching contact positioned in a fixed contact, said contacts forming part of a switch according to the invention and FIG. 2 on a larger scale a cross-sectional view taken on the line II-II in FIG. 1.
  • l is a portion of a movable switching contact in the shape of an axially movable switching rod.
  • This switching contact is permanently snugly enclosed by a zigzag folded metal strip 2 which is bent in the shape of a ring.
  • This zigzag folded annularly bent strip 2 is mounted in an annular holder 3, to which the circuit to be closed and to be interrupted by the switch is connected in a manner not shown.
  • FIG. 2 illustrates how the strip 2 is folded and extends between the holder 3 and the switching rod.
  • the strip is folded in such a manner, that the folds 4 lying on the inner circumin pairs throughout their length.
  • the pairs of parts 2', 2 join with cylindrically bent portions 5. Since in the free state of the ring formed by the strip 2 the inner diameter of said ring is smaller than the outer diameter of the switching rod 1, the pairs of parts 2', 2" will be forced aside, when the switching rod is inserted into the fixed contact, so that they will be forced with a certain spring force against the switching rod.
  • the torque required for this spring force is taken up by the cylindrically bent portions 5 which bear against the inner periphery of the annular holder 3 and constitute in pairs a relatively large foot for each pair of parts2',2" ofthe strip 2.
  • the movable switching contact may also be formed as an axially movable tubular contact.
  • An electric switch comprising: an axially movable switching rod, and a resilient annular fixed contact which is in permanent axially sliding contact with said switching rod and connects said switching rod electrically conductively with the circuit to be closed and opened by said switch; said fixed contact comprising a stationary annular metal holder surrounding said switching rod, and a stationary zigzag folded metal strip bent in the shape of a closed ring and supported in said holder between said holder and said switching rod; and the parts of the zigzag folded metal strip extending substantially tangentially in respect of the switching rod and being forced against said switching rod by their resiliency, said zigzag folded metal strip parts joining each other, at the inner circumference of the ring formed by said zigzag folded metal strip, in pairs with sharp folds of and thereby lying substantially against each other in pairs throughout the major portion of their length.
  • An electric switch comprising: an axially movable switching rod having a cylindrical outer surface and an annular fixed contact which is in sliding contact with said outer surface of the switching rod to connect said switching rod in electrically conductive relation with a circuit to be closed and opened by said switch; said fixed contact comprising a stationary metal holder having an annular recess surrounding said switching rod, and a zigzag metal strip seated in said recess to form an annulus surrounding and engaging said switching rod; said annular recess presenting a cylindrical surface concentric with said outer surface of the switching rod and spaced radially therefrom by a predetermined distance; and the zigzag folding of said metal strip presenting strip parts of which adjacent pairs thereof are joined at the inner circumference of said annulus along acute folds and in which adjacent strip parts are joined at the outer circumference of said annulus along cylindrical bent portions, said cylindrical bent portions and said acute folds being parallel with said cylindrical bent portions engaging said cylindrical surface of said holder and said acute folds engaging said cylindrical outer surface of said switching rod, and each strip part being of

Landscapes

  • Push-Button Switches (AREA)
  • Contacts (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
US830345A 1968-06-05 1969-06-04 Electric current contact Expired - Lifetime US3571547A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6807852A NL6807852A (cg-RX-API-DMAC10.html) 1968-06-05 1968-06-05

Publications (1)

Publication Number Publication Date
US3571547A true US3571547A (en) 1971-03-23

Family

ID=19803818

Family Applications (1)

Application Number Title Priority Date Filing Date
US830345A Expired - Lifetime US3571547A (en) 1968-06-05 1969-06-04 Electric current contact

Country Status (8)

Country Link
US (1) US3571547A (cg-RX-API-DMAC10.html)
JP (1) JPS497937B1 (cg-RX-API-DMAC10.html)
BE (1) BE733987A (cg-RX-API-DMAC10.html)
DE (2) DE1790035B2 (cg-RX-API-DMAC10.html)
FR (1) FR1581930A (cg-RX-API-DMAC10.html)
GB (1) GB1210636A (cg-RX-API-DMAC10.html)
NL (2) NL6807852A (cg-RX-API-DMAC10.html)
SE (1) SE362981B (cg-RX-API-DMAC10.html)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3751619A (en) * 1971-07-01 1973-08-07 Bbc Brown Boveri & Cie Electrical contact structure of the plug-and-socket type circuit breakers
US3909573A (en) * 1974-04-24 1975-09-30 Ite Imperial Corp Squeeze coil primary disconnect contacts
US4462657A (en) * 1980-04-18 1984-07-31 Eaton Corporation Compliant electrical connector for flat conductors
US5012807A (en) * 1990-05-03 1991-05-07 Siemens-Pacesetter, Inc. Multi-part molded pacemaker connector and method of making same
US5076270A (en) * 1990-05-03 1991-12-31 Siemens-Pacesetter, Inc. Apparatus and method for making electrical connections in an implantable pacemaker
EP2698803A1 (en) * 2012-08-17 2014-02-19 ABB Technology Ltd A circuit breaker

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8322848D0 (en) * 1983-08-25 1983-09-28 Electroheating Int Sliding contact arrangement
US4538019A (en) * 1984-04-30 1985-08-27 United Technologies Corporation Grounding of a control rod extending through an opening in a structure
FR2688338B1 (fr) * 1992-03-06 1997-04-04 Alsthom Gec Dispositif de contact annulaire electrique, en particulier pour disjoncteur.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2975254A (en) * 1958-06-25 1961-03-14 Allis Chalmers Mfg Co Spring bearing for vacuumized electric devices
US3087038A (en) * 1959-10-19 1963-04-23 Raymond W Bethke Electric current interchange contact

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2975254A (en) * 1958-06-25 1961-03-14 Allis Chalmers Mfg Co Spring bearing for vacuumized electric devices
US3087038A (en) * 1959-10-19 1963-04-23 Raymond W Bethke Electric current interchange contact

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3751619A (en) * 1971-07-01 1973-08-07 Bbc Brown Boveri & Cie Electrical contact structure of the plug-and-socket type circuit breakers
US3909573A (en) * 1974-04-24 1975-09-30 Ite Imperial Corp Squeeze coil primary disconnect contacts
US4462657A (en) * 1980-04-18 1984-07-31 Eaton Corporation Compliant electrical connector for flat conductors
US5012807A (en) * 1990-05-03 1991-05-07 Siemens-Pacesetter, Inc. Multi-part molded pacemaker connector and method of making same
US5076270A (en) * 1990-05-03 1991-12-31 Siemens-Pacesetter, Inc. Apparatus and method for making electrical connections in an implantable pacemaker
EP2698803A1 (en) * 2012-08-17 2014-02-19 ABB Technology Ltd A circuit breaker
WO2014026924A1 (en) * 2012-08-17 2014-02-20 Abb Technology Ltd A circuit breaker
US9245700B2 (en) 2012-08-17 2016-01-26 Abb Technology Ltd Circuit breaker
RU2592633C1 (ru) * 2012-08-17 2016-07-27 Абб Текнолоджи Лтд Прерыватель цепи

Also Published As

Publication number Publication date
BE733987A (cg-RX-API-DMAC10.html) 1969-11-17
DE1790035A1 (de) 1970-06-04
NL6807852A (cg-RX-API-DMAC10.html) 1969-12-09
SE362981B (cg-RX-API-DMAC10.html) 1973-12-27
DE1790035B2 (de) 1971-06-03
FR1581930A (cg-RX-API-DMAC10.html) 1969-09-19
GB1210636A (en) 1970-10-28
NL130854C (cg-RX-API-DMAC10.html)
DE6912957U (de) 1969-11-27
JPS497937B1 (cg-RX-API-DMAC10.html) 1974-02-23

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