US3551629A - Electric contact means - Google Patents

Electric contact means Download PDF

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Publication number
US3551629A
US3551629A US823771A US3551629DA US3551629A US 3551629 A US3551629 A US 3551629A US 823771 A US823771 A US 823771A US 3551629D A US3551629D A US 3551629DA US 3551629 A US3551629 A US 3551629A
Authority
US
United States
Prior art keywords
contact
tip
contact element
contact means
supporting edge
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
US823771A
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English (en)
Inventor
Samuel Berg
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
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 ASEA AB filed Critical ASEA AB
Application granted granted Critical
Publication of US3551629A publication Critical patent/US3551629A/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
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
    • 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
    • H01H1/385—Contact arrangements for high voltage gas blast circuit breakers

Definitions

  • ELECTRIC CONTACT MEANS BACKGROUND OF THE INVENTION scorch marks from appearing on the main contact surface of lo the contact element which normally consists of silver-plated or otherwise surface-treated copper, Le. a material having good electrical conductivity but relatively little resistance to arcing.
  • the contact tip is placed so that the base points of an are formed during short-circuiting or breaking arise on the tip and remain there.
  • the object of the present invention if to provide a contact means in which the contact tip is fixed to the contact element A in such a way that the above mentioned disadvantages with previously known contact means are avoided as far as possi' ble.
  • This is achieved according to the invention by providing the contact tip on the side of the tip facing away from the contact surface with a projecting anchoring fin which is arranged to engage like a hook in a groove in the contact element and to project behind a supporting edge of the contact element. said supporting edge being arranged at that end of the contact ele ment which is situated nearest the contact tip.
  • the supporting edge arranged on the contact element holder is suitably designed to form a stop for the tip as well as for the movement of the contact element. Since the movement of the contact element is limited by the tip meeting the supporting edge, the contact force between the tip and the contact element is maintained even when one contact member of the contact means during a breaking process is at some distance from the other contact member and an arc exists so that the current flows through the tip to the contact element.
  • FIG. I shows in axial section a sheath contact means.
  • FIGS. 2. 3 and 4 show three projections at right angles to each other of a contact tip in the contact means shown in FIG. 1.
  • FIG. 5 shows a knife contact means and FIG. 6 a pressure contact means.
  • Contact tips of the type shown in FIGS. 2- -4 are also included in the contact means according to FIGS. 5 and 6.
  • each contact element 3 is provided with a contact tip 8, shown in detail in FIGS. 2-4.
  • the contact tip 8 is made of copper-tungsten and is sintered to its final shape. On the side of the tip 8 facing away from its contact surface 9 the tip is provided with a projecting anchoring fin 10.
  • the fin 10 extends in the longitudinal direction of the contact element 3 beyond both ends of the tip so that two projections 11 and 12 are formed.
  • a recess 13 in the form of a transverse groove. open at the front. in which the tip 8 is inserted.
  • the contact element 3 is also provided with a longitudinal groove 14 on its opposite side in which the fin 10 of the tip is guided.
  • the backwardly directed projection 11 of the fin effects a grip which locks the rear end of the tip.
  • the frontwardly directed projection 12 of the pin abuts a supporting edge 15 on the arcing ring 5, which is designed so that the ring 5 prevents the tip 8 from tilting or gliding forwards.
  • the contact surface between the tip 8 and the contact element 3 has the same contact force as the contact surface between the tip 8 and the movable contact plug 2, In completely closed position the current transmission takes place directly between the movable contact plug 2 and the copper contact element 3.
  • FIG. 5 shows a knife contact means with a stationary cliptype contact 16 and a movable contact knife 17.
  • the clip-type contact 16 has two or more contact elements 3 with contact tips 8, which are attached in the same way as in the arrangement according to FIG. 1.
  • the contact elements 3 are arranged in a contact element holder 18 which is provided at the front with a supporting edge 19.
  • FIG. 6 shows a section through a pressure contact means which is rotationally symmetrical about the axis shown in dotted lines.
  • the contact means comprises a number of contact elements 3 which are arranged in a stationary contact element holder 20.
  • the movable contact member of the contact means consists of a contact sheath 21.
  • the contact elements 3 are provided with contact tips 8 shaped and attached in the same way as described in connection with FIG. I.
  • the supporting edge of the contact element holder is in this case designated 22.
  • the inven- 7 tion can be used in several different contact means.
  • the invention is not limited to the embodiments shown, but many modifications are feasible within the scope of the following claims.
  • leaf springs may be used which are designed so that they yield edgewise, in which case one and the same groove in the contact element 3 can be used both to retain the springs and to guide the contact tip 8.
  • An electric contact means having two cooperating contact members, a contact element holder having an inwardly directed supporting edge, one of said contact members comprising at least one elongated contact element, said contact element movably mounted in said contact element holder and provided at one end with a contact tip of arc-resistant contact metal, said contact tip having a contact surface, means resiliently urging said contact element in the direction of said contact surface,'said contact element having a groove therein, said contact tip provided with an anchoring fin projecting from that side of the contact tip facing away from its contact surface, said anchoring fin including hook means engaging in said groove in said contact element and a projection protecting behind said supporting edge on said contact element holder, said supporting edge arranged at that end of said contact holder which is situated nearest said contact tip.

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  • Contacts (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US823771A 1968-05-15 1969-05-12 Electric contact means Expired - Lifetime US3551629A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE6524/68A SE310019B (es) 1968-05-15 1968-05-15

Publications (1)

Publication Number Publication Date
US3551629A true US3551629A (en) 1970-12-29

Family

ID=20268905

Family Applications (1)

Application Number Title Priority Date Filing Date
US823771A Expired - Lifetime US3551629A (en) 1968-05-15 1969-05-12 Electric contact means

Country Status (6)

Country Link
US (1) US3551629A (es)
CH (1) CH489103A (es)
DE (1) DE1923353B2 (es)
FR (1) FR2008548A1 (es)
GB (1) GB1259019A (es)
SE (1) SE310019B (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4188516A (en) * 1978-11-01 1980-02-12 Westinghouse Electric Corp. Telescoping disconnect switch with high current contact system
DE4402935A1 (de) * 1994-02-01 1995-08-03 Abb Patent Gmbh Kontaktsystem für einen Hochspannungsleistungsschalter

Also Published As

Publication number Publication date
CH489103A (de) 1970-04-15
FR2008548A1 (es) 1970-01-23
SE310019B (es) 1969-04-14
GB1259019A (es) 1972-01-05
DE1923353B2 (de) 1971-08-12
DE1923353A1 (de) 1970-04-16

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