[go: up one dir, main page]

US3118990A - Switch with bridging cartridge fuse - Google Patents

Switch with bridging cartridge fuse Download PDF

Info

Publication number
US3118990A
US3118990A US68970A US6897060A US3118990A US 3118990 A US3118990 A US 3118990A US 68970 A US68970 A US 68970A US 6897060 A US6897060 A US 6897060A US 3118990 A US3118990 A US 3118990A
Authority
US
United States
Prior art keywords
contact
frame
bridge member
switch
contacts
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
US68970A
Other languages
English (en)
Inventor
Jansson Erik Gunnar Edvin
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3118990A publication Critical patent/US3118990A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01H1/42—Knife-and-clip contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/54—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
    • H01H19/60—Angularly-movable actuating part carrying no contacts
    • H01H19/635—Contacts actuated by rectilinearly-movable member linked to operating part, e.g. by pin and slot
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/16—Adaptation for built-in fuse
    • H01H21/165—Fuses mounted on, or constituting the movable contact parts of, the switch
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S70/00—Locks
    • Y10S70/74—Spring tumbler

Definitions

  • the present invention relates to electric switches having a frame, a bridge member which is movable with respect to the frame, and terminal members for incoming and outgoing conductors.
  • the bridge member is provided with contacts, herein termed movable contacts, which are adapted to cooperate with corresponding contacts carried by the frame, herein termed fixed contacts, and also with contact members provided on a number of electrical apparatus which are carried by the bridge member.
  • the said design entails certain difiiculties and inconveniences.
  • the contact members of the apparatus in question are liable to become damaged through arcing in connection with the opening and closing movements of the bridge member of the switch.
  • the contact members of the apparatus carried by the bridge member have the shape of knives or blades which are inserted in fork-shaped contacts on the bridge member, it is known to let the latter contacts cooperate with corresponding fixed contact forks on the frame, whereby the knives or blades are protected from damages through the formation of electric arcs.
  • a special object of the invention is to protect the contacts of the apparatus carried by the bridge member from damages on account of electric arcs while making provision for a direct contact between the contacts of the apparatus and the contacts of the frame in the closed position of the circuit breaker or switch.
  • the above objects and advantages have been realized by arranging the contacts of the bridge member and the contacts of the frame in such a manner with respect to each other and to the contact members of the electrical apparatus as to secure, in connection with the movement of the bridge member towards the frame for the purpose of closing the circuits controlled by the switch, at each pair of a fixed and a movable contact, a contact between the two said contacts and also a contact directly between the contact members of the appertaining apparatus and the fixed contact.
  • FIGURE 1 is a perspective view of a switch in which the invention has been realized.
  • FIGURES 2a, 2b and 2c illustrate schematically the functioning in connection with the closing of the contacts of the switch according to FIGURE 1.
  • Reference numeral 1 denotes the frame of the switch, said frame being shaped as a bottom plate, and reference numeral 2 a bridge member which is movable in parallel with itself towards and away from the frame. Attached to the latter are a number of fork-shaped spring contacts 3, which are secured on a base 4 of insulating material and connected with terminal clips 5 which serve as terminal members for the incoming and outgoing conductors 6.
  • movable bridge member 2 Mounted on the movable bridge member 2 are a number of electrical apparatus 7, which in the embodiment selected are assumed to consist of so called grip fuses.
  • the fuse cartridges are provided at each end with a contact knife, or blade, 8 which is removably received in a corresponding fork contact 9 on the bridge member to permit replacement when desired.
  • the latter contacts constitute the movable contacts of the switch.
  • the movement of the bridge member in connection with the closing and the opening of the switch or circuit breaker is effected by means of a control rod 10 which is secured on a shaft 11 with a certain angular play. Rigidly secured on the shaft 11 is an arm 12 which by means of tooth segments is in engagement with a similar arm 13 on a shaft 14 parallel with the shaft 11.
  • each arm 12 and 13 is provided with abutting surfaces adapted to cooperate with pins 15 and 16 projecting from the end surface of the bridge member.
  • a strong tension spring 17 is biased to hold the said free ends of the arms 12 and 13 together.
  • the details 12, 13 and 17 thus form together a toggle mechanism.
  • a similar mechanism is provided at the opposite side of the circuit breaker.
  • both the fork contacts on the frame and the fork contacts on the bridge member are composed of U- shaped blade springs placed in pairs opposite each other.
  • Each such contact spring of the bridge member consists of a longer outer leg 9a and an inner shorter leg 91). The latter leg engages the contact blade 8, whereas the former is intended to cooperate with the contact springs of the frame.
  • the outer legs 3a are .of essentially the same length as the inner ones 3b.
  • the reference numeral 19' designates a yoke member which limits the possibility of the outer legs 9a of moving away from each other. All the legs 3a, 3b of the fixed contact springs are substantially parallel with each other and with the contact blade 8, whereas the outer legs 9a of the movable contact springs converge in the direction from the frame 1.
  • FIGURE 2a shows a pair of fixed and movable contact forks in open position.
  • FIGURE 2b a closing movement has been initiated and the bridge member has moved so far towards the frame that the outer legs 3a of the contact springs of the latter have engaged the outer spring legs 9a of the bridge member.
  • No direct contact has as yet been established between the contact blade 8 and the inner legs 3b of the contact springs of the frame.
  • FIGURE 2c shows the switch in fully closed position.
  • an important advantage found in the arrangement according to the invention consists in that the strong magnetic fields set up in connection with a possible short-circuit will cancel each other because of the particular arrangement of the contact forks, so that no forces are set up which could move the electrical apparatus 7 away from their positions.
  • An electric switch comprising a frame, a bridge member, mechanism for guiding and moving said bridge member towards and away from said frame to respectively close and open said switch, a cartridge fuse removably carried by said bridge member, said cartridge fuse having two knife-shaped contact elements, a pair of fork-shaped contacts mounted on said bridge member and each such contact having spring arms spaced to receive and hold a knife-shaped contact of said cartridge fuse and being of such length as to cover only part of the contact surfaces of each contact element in the inserted position of the fuses, a pair of fork-shaped contacts mounted on said frame and adapted to be connected respectively to incoming and outgoing lines, said forkshaped frame contacts each having spring arms positioned and spaced to directly engage the exposed surfaces of a contact element of said fuse in the closed position of the switch, a pair of second contacts mounted on said frame and each electrically connected with a corresponding forkshaped frame contact, a pair of second contacts mounted on said bridge member each electrically connected with a corresponding fork-shaped bridge contact, the said second frame contacts being positioned to

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
US68970A 1959-11-14 1960-11-14 Switch with bridging cartridge fuse Expired - Lifetime US3118990A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1070659 1959-11-14

Publications (1)

Publication Number Publication Date
US3118990A true US3118990A (en) 1964-01-21

Family

ID=20292730

Family Applications (1)

Application Number Title Priority Date Filing Date
US68970A Expired - Lifetime US3118990A (en) 1959-11-14 1960-11-14 Switch with bridging cartridge fuse

Country Status (6)

Country Link
US (1) US3118990A (zh)
BE (1) BE597058A (zh)
CH (1) CH389727A (zh)
DE (1) DE1165712B (zh)
GB (1) GB954900A (zh)
NL (1) NL257897A (zh)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3259718A (en) * 1965-01-11 1966-07-05 Gen Electric Fusible electric switch equipped with combination fuse holder and arcing contact
US3382340A (en) * 1966-09-24 1968-05-07 Square D Co Double jaw for a knife switch
US3737727A (en) * 1972-07-17 1973-06-05 Furnas Electric Co Thermal overload device
US4342889A (en) * 1974-05-24 1982-08-03 G & W Electric Specialty Company Modular vault-type load break switch
US4933519A (en) * 1988-08-31 1990-06-12 Westinghouse Electric Corp. Contact structure for grounding switch
US5061833A (en) * 1985-12-16 1991-10-29 Cleaveland/Price Inc. Compact disconnect switch having broadly variable current rating

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3346711A (en) * 1962-12-05 1967-10-10 Square D Co Electrical switch
DE2934372C2 (de) * 1979-08-24 1983-04-07 Werner Messmer Gmbh & Co Kg, 7760 Radolfzell Mehrfach-Kontaktvorrichtung
DE4430046C2 (de) * 1994-08-24 2001-08-16 Wermelinger Ag Wolhusen Sicherungs-Lastschaltgerät und/oder -Trennschaltgerät
EP0926692B1 (de) * 1996-02-28 2001-08-08 Wermelinger AG Sicherungs-Lastschaltgerät und/oder -Trennschaltgerät
CZ288813B6 (cs) * 1996-02-28 2001-09-12 Wermelinger Ag Bezpečnostní spínací přístroj

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2128999A (en) * 1936-01-16 1938-09-06 William H Frank Switch
US2289122A (en) * 1937-05-01 1942-07-07 Square D Co Electric circuit controlling device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT189693B (de) * 1955-04-08 1957-04-25 Walther F Werke Sicherungstrennschalter
BE554375A (zh) * 1957-01-22 1957-02-15

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2128999A (en) * 1936-01-16 1938-09-06 William H Frank Switch
US2289122A (en) * 1937-05-01 1942-07-07 Square D Co Electric circuit controlling device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3259718A (en) * 1965-01-11 1966-07-05 Gen Electric Fusible electric switch equipped with combination fuse holder and arcing contact
US3382340A (en) * 1966-09-24 1968-05-07 Square D Co Double jaw for a knife switch
US3737727A (en) * 1972-07-17 1973-06-05 Furnas Electric Co Thermal overload device
US4342889A (en) * 1974-05-24 1982-08-03 G & W Electric Specialty Company Modular vault-type load break switch
US5061833A (en) * 1985-12-16 1991-10-29 Cleaveland/Price Inc. Compact disconnect switch having broadly variable current rating
US4933519A (en) * 1988-08-31 1990-06-12 Westinghouse Electric Corp. Contact structure for grounding switch

Also Published As

Publication number Publication date
CH389727A (de) 1965-03-31
NL257897A (zh)
DE1165712B (de) 1964-03-19
BE597058A (fr) 1961-03-01
GB954900A (en) 1964-04-08

Similar Documents

Publication Publication Date Title
US3815059A (en) Circuit interrupter comprising electromagnetic opening means
RU2502147C2 (ru) Коммутационное устройство
US3118990A (en) Switch with bridging cartridge fuse
US4654490A (en) Reverse loop circuit breaker with high impedance stationary conductor
US3343108A (en) High speed circuit interrupter using magnetic blowoff and means for decreasing the inertial effects during interruption
US2190517A (en) Circuit breaker
US3662133A (en) Space-plate arc-chute for an air-break circuit breaker
US3263042A (en) Electric control device with electromagnetic contact-biasing means
US2329003A (en) Electric switch
KR840000984Y1 (ko) 소호장치를 가진 회로차단기
US2590543A (en) Spaced plate circuit interrupter
US3422381A (en) Multi-pole circuit breaker with common trip bar
US3177325A (en) Mechanical and electrical pivot between removable arc chute and stationary contact structure
US2824934A (en) Visible-blade arc-extinguishing disconnecting switch
US3243559A (en) Electric switch with novel arc cooling means
US2606983A (en) Circuit interrupter contact
US3118036A (en) Circuit breaker contact and arc extinguishing means
US5319166A (en) Molded case circuit breaker modular contact arm arrangement
US2849579A (en) Contact structure
US2367937A (en) Circuit interrupter
EP0165998B1 (en) Power switch
US2849572A (en) Fusible electric switch
US4598187A (en) Current limiting circuit breaker
US3211867A (en) Electric switching device having segmented non-welding contact assembly
US3602676A (en) Knife blade switch with toggle operating means and means for fastening the knife blade to a tie bar