US2764652A - Interrupter for high current intensity - Google Patents

Interrupter for high current intensity Download PDF

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Publication number
US2764652A
US2764652A US420374A US42037454A US2764652A US 2764652 A US2764652 A US 2764652A US 420374 A US420374 A US 420374A US 42037454 A US42037454 A US 42037454A US 2764652 A US2764652 A US 2764652A
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US
United States
Prior art keywords
contact
bridge
contacts
members
shaft
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
US420374A
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English (en)
Inventor
Debuit Louis
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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 Merlin Gerin SA filed Critical Merlin Gerin SA
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Publication of US2764652A publication Critical patent/US2764652A/en
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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
    • H01H1/16—Contacts characterised by the manner in which co-operating contacts engage by abutting by rolling; by wrapping; Roller or ball contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts

Definitions

  • a still further object of'the invention is a development of a bridging contact member, hereinafter shortly designated as contact bridge, such that at each pole to be interrupted, the circuit, through the lifting of the contact bridge from the stationary contacts, is doubly broken, and
  • the contact bridge comprises at least one rotary contact member or one or more units, each unit of one or more rotary contact members.
  • This rotary'contact member or the units of rotary contact members thus constitute a movable bridge which by means ,of an actuating mechanism may be moved into or out of the bridging, contact making position between the stationary contacts.
  • contact bridges comprising one or more contact members or rollers shaped as bodies of revolution, such as cylinders, rollers or rings, and which as a rule are rotary, will be arranged to bridge the stationary main contacts themselves and further contact bridges with one or more such contact members will be arranged to bridge the arc horns or runners with which the main contacts may be provided.
  • a primarycontact bridge of one or more units each unit of one or more rotary contact members, will serve for bridging the main contacts directly and thus as main movable contact of the interrupter whereas a secondary contact bridge comprising one or more rotary contact members each, will serve as movable arcing contact and bridge the arc horns, with its axis of rotationspaced from and parallel to the bridging of the ice - bridges for moving by means of the connecting members both contact bridges concurrently into the circuit making or the circuit breaking position, into or out of the bridging, contact making position between the contact pieces and between the arc horns, respectively.
  • the motion transmitting members which couple the drivingmembers of the actuating mechanism with the rotary contact members ofthe contact bridges provide for an idle path between the driving members and the rotary contact member or members of the secondary contact bridge.
  • Such an idle path,.but of shorter length, is also provided between the driving members and the rotary contact member or members of the primary contact bridge.
  • This idle path makes it possible, during the movement accelerate the driving members to a velocity such that they strike on the contact bridge or bridges in a shock movement and thus lift abruptly the rotary contact member or members from contact with the stationary contacts.
  • the invention further provides for a mounting of the rotary contact members on their supporting shaft or axle which makesunnecessary any particular regulating of the setting of the contacts.
  • the interrupter furthermore, through the employ of rotary contact members, such as rollers or revolvable rings, is rendered remarkably insensitive to deposits which might settle between the stationary and the mobile contacts when the atmosphere surrounding the interrupter is contaminated.
  • Fig. 1 is a schematic elevational side view, partly in section along line 1-1' of Fig, 2, of a pole oflan interrup'ter of the invention, the r ota rycontact members of the stationary main contacts and of; the arc horns being in bridgingQciIcuit making:position;
  • Fig; 2* is a schematic elevation-a1 section along line 2"-2-'of Fig. 1 and partly a front view of'theinterrupter;
  • Figs; 3'and 4 respectively are, on. an enlarged scale, sectionsalong line 3 3of Fig. 4 and line 4 4 o f Eig. 3 ⁇ : o f-arotary contact member of the, main contacts in,v closed, or bridging, position; i
  • Fig. 5 is a view similar to that of' Fig l' whichhowever shows therotary contact members both of 'the main contacts and of-the arcing contacts in open, circuit-breaking position?
  • Figs. 6 and 7 respectively are, on an enlarged; scale, sections along line 66' of Fig. 7" and; line, 7"- -7 of Fig, 6' showing,- similar to Figs. 3 and 4, a rotary contact member in open, circuit breaking position;
  • Figs. 8', 9-and 1'O respe ctively are a front, a side view, and a top- View
  • a connecting member provided between both contact bridges and Fig.- 11', similar to Fig, 2
  • Fig.- 11' is a schematic elevational front view, partly in section correspondingto the section line 11 11 of Fig. 1, of an embodiment; in which the interrupter'pole is composed of two stationary and mobile contact units aligned in the width direction.
  • thestati'onary main contacts are designated by 11 and 12. These two contacts arearranged symmetrically at a certain distance from the median symmetry'plane of. the apparatus when seen as illustrated in Figs. 1 and 5.
  • thevisible main contacts are designated by 41, 43, the complementary co11tact pieces are 42, 4;4 written in brackets-since not visible, onthe figure.
  • Each stationary main contact carriesat its top'an arcing horn or arc runner 21', 22 l, 2 and 5, and 23, 24," 25-, 26' in Fig. ll. 7
  • arcing horns not visible in this-figure.. 'l'she arcing; horns. are disposed between-walls 31-, 32, 335,394,015 refractory material. of an arcing chamber. and are secured byconventional means, here not v shown, to the frame bars 13 and 15.
  • the rotary-contaetmem; bers or,rolle1 ,s, 3;6,, Figs. 1 to,-7,;and;37,- 38, Fig, 11, are examples of arcing horns not visible in this-figure.. 'l'she arcing; horns. are disposed between-walls 31-, 32, 335,394,015 refractory material. of an arcing chamber. and are secured byconventional means, here not v shown, to the frame bars 13 and 15.
  • the numerals 25, 26 are in brackets, they'designate here in the form of rings which, together with their shafts 39, 40, respectively, about which they are revolvable, form the main or primary contact bridge.
  • This primary contact bridge in its circuit making or closed position bridges the main contacts 11, 12, directly and thus closes the current on the main circuit 1911-36-12-20.
  • e ont ct o l e he. c r u t hrough he. main contacts 11, 12, and the primary contact bridge con- Stitutedzby the contact rollers outings--35; Similarly,- in.
  • frollers or-x ll q units may be employed, each-unitv of any'desiredg num ewio lers nrings, o esppnding o t rr ntbreakns; a a i r a t. h. e ui b ake 1 s esi ned;
  • bridge is op er ate dv by connecting, members or, bars two, Of them SS, 5 6,,in-,the embodiment of Fig s.
  • interrupterfurther comprises the, actuating; shaft 61 which maybe rocked by any. conwntional, or. convenient:- means, by hand or, remote. control, here not shown.
  • Shaft ;61,;fu1 ther carries. for eachconnecting bar, a pinion,
  • he motion of hqactllatinggneaust and part ularlyof shaft39, or 40. may thus be acseler; .v lsc ty o etheringe 316 o 217,. 8,, re. l fted.outf he-bridging posi ionbetweenthe; ta n ry. main contacts 11, 12, or 41, 42; 43, 4 4.,.
  • the shaftfi? or, 4! willthus strike inashock movementpn the bridging c on tact rollers-1 or, rings, 36,; 01;.
  • Throat is; shape,d with afi linclrical bore, 47.,ne aem. q fi -Qrin the .diametriical directionflqf, ach; ring, 36; 37, 38.
  • the mobile arcing contact bridge in the embodiments illustrated, comprises for each pair of arc horns 21, 22; and 23, 25; 24, 26,a single roller 66 and 67, 68 rotatable about or with its shaft 69 and 70, respectively.
  • These shafts are mounted, vertically slidable with their journals 71, 72; and 73, 74, 75, in slots 76 of the connecting bars 55, 56 and 57, 58, 59, respectively.
  • correspondingly slotted caps or sockets 77 are inserted into the upper ends of bars 55, 56; 57, 58, 59 and are secured therein by means of screws, as indicated at 78.
  • These caps'77 house springs 79 which urge shafts 69, 70 and thus rollers 66; 67, 68, downwards, towards the bridging, circuit closing position.
  • the connecting bars 55,'56,.Figs. lto 10, and 57, 58, 59; Fig. 11, are of electrically insulating material while the racks 63 and the caps or sockets 77 housing the springs I are of metal.
  • the slots 76 are so disposed in the connecting bars 55, 56and 57, 58, 59 relatively to the shafts 69 and 70, respectively, and are of such a length that the actuating mechanisms together with the connecting bars may idly move alongan' idle path of a length a, Fig. 2, relatively to the shafts 69 or 70 and the arcing rollers 66 or 67, 68
  • roller 66 will close the circuit first and only thereafter will the rollers 36 bridge the main contacts 11, 12.
  • the primary contact bridge comprises five rollers. It will be readily understood, however, that the number of the rollers may be any, varying in dependence upon the nominal intensity or current breaking capacity of the circuit breaker. Moreover, a standard unit for interrupting a certain nominal amperage may be established and the pole of the interrupter accordingly composed of an appropriate number of such standard units.
  • Fig. 11 as described hereinabove illustrates an embodiment where a pole of the interrupter is set up from two of such units. There are two sets of stationary contacts,
  • one set comprising the contacts 41, 42, the other the. contacts 43, 4-4.
  • the primary and secondary contact bridges may be mounted upon and actuated by the same actuating shaft (61) with the obvious condition, of course, that the poles are electrically insulated from one another.
  • the manufacture and holding in stock of the detached pieces of the circuit breaker will thus be greatly simplified, with the additional advantage that dependent upon the circuit breaking capacity of the circuit breaker only one dimension, viz. the width, is to be changed while the other dimensions may be the same.
  • proyidedi with: am arc horn, .aprhnarytcontactz bridge..-comprising ate leastzrone rotary contact: member; beingrassociated; with; said; main-scone tacts for bridging the same:.dir.eotly; 13-).
  • actuating mechanismfi including:drivingrmemhersrforr op.enatingathe.interrupter;L
  • connectingr members being; provided; between-both: saidv contact bridges, said actuating mechanism foramovingtbw means": Of) said; connectingmembers; both saidsi contact bridgesa.concurrently:v into: circuit making: and breakinzc positions, intoand; out; of: the bridging. contaotamalcinz-x positions between-:said. main', contacts-.-andtsaid arcrhornsta respectively; said; actuatingz meehanismrfurthen including; motion: transmitting members. coupling said. connecting; members i with. said contact bridges-,-. said. motionztr-ansmitzvtingrmemberstprovidingztfor'an idle. path between; said;
  • 6'.i.Cur rent interrupter including a 'painofstationary- Contaotsnforr each pole; to: be interrupted and: a. contactt shaft :bearingrwi-th. said:ba1l :uponzthc; innensurfacerofthe;
  • asztoz biasa-it elastically towards; the contac'nmak. ing-position;saidtthroatzfurthcr shaped to;pro,vide anidle; path: between. itselfiandithe; inner: circumference. of thering whenitherring is helid. ingcontact position by said spring;
  • said throat housing a spring urged ball [and bearing therewith upon the inner surface of the ring so as to bias it elastically towards the contact making position; said throat further shaped to provide said idle path between its upper surface and the upper inner circumference of the ring when the ring is held in contact position on said main contacts by said spring urged ball, said idle path allowing said throat and shaft to be raised a certain distance Without lifting the ring when the actuating means are operated to break the circuit, whereupon, on further upward movement of the shaft, the ring is lifted :and the circuit through said main contacts and said ring is broken.
  • the rotary contact member associated with said arc horns is a roller, a shaft carrying said roller being secured thereto and being mounted in said connecting members, said motion transmitting members for providing an idle path and interposed between said actuating means and said secondary contact bridge being constituted by slots in said connecting members, said shaft being displaceably guided within said slots, springs being housed in said slots, said springs bearing on said shaft for urging through said shaft said roller elastically towards the contacting position bridging said are horns; said slots in said connecting members being disposed relatively to said shaft and being of a length so as to cause, on actuation of the actuating means for breaking the circuit, idle motion of said actuating means together with said connecting members relatively to said shaft for a certain distance before the roller is raised out of contact with said are horns; thereby to delay the circuit breaking of said roller and further rallow, during said idle motion, acceleration of said actuating means together with said connecting members, and, thereon, an abrupt raising of the

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  • Contacts (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US420374A 1953-04-14 1954-04-01 Interrupter for high current intensity Expired - Lifetime US2764652A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1239386X 1953-04-14

Publications (1)

Publication Number Publication Date
US2764652A true US2764652A (en) 1956-09-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
US420374A Expired - Lifetime US2764652A (en) 1953-04-14 1954-04-01 Interrupter for high current intensity

Country Status (4)

Country Link
US (1) US2764652A (fr)
DE (1) DE1239386B (fr)
FR (3) FR1077705A (fr)
NL (1) NL90894C (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2929897A (en) * 1958-11-12 1960-03-22 Electrosnap Corp Sensing switch
US2935585A (en) * 1957-04-22 1960-05-03 Sigma Instruments Inc Polarized electromagnetic relay
US3402272A (en) * 1965-07-22 1968-09-17 Ite Circuit Breaker Ltd Dual path current limiting circuit breaker
US4319104A (en) * 1978-06-30 1982-03-09 Bbc Brown, Bovery & Company, Ltd. Movable contact unit for a direct-current, high-capacity circuit breaker

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US693416A (en) * 1899-11-09 1902-02-18 Lorain Steel Co Circuit-breaker.
US1740640A (en) * 1925-05-25 1929-12-24 Ohio Brass Co Electric switch
US2491010A (en) * 1945-07-27 1949-12-13 Ohio Brass Co Electric switch having electromagnetic arc extinguishing means

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE593861C (de) * 1934-03-06 Julius Hermann Klemt Waelzkontakt fuer Druckschalter
DE302065C (fr) *
AT96686B (de) * 1921-07-21 1924-04-25 Julius Ing Clossmann Einrichtung zur Verhinderung der Funkenbildung bzw. Funkenlöschung an den Kontaktstellen elektrischer Schalter.
DE637200C (de) * 1934-07-25 1936-10-24 Aeg Strombruecke mit Klotzkontakten fuer elektrische Schalter mit nichtfedernden festen Kontakten und mit Vorkontakten
DE674689C (de) * 1935-11-12 1939-04-19 Aeg Stromabnahmevorrichtung fuer Kontaktbahnen
DE916897C (de) * 1939-01-12 1954-08-19 Siemens Ag Kontaktvorrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US693416A (en) * 1899-11-09 1902-02-18 Lorain Steel Co Circuit-breaker.
US1740640A (en) * 1925-05-25 1929-12-24 Ohio Brass Co Electric switch
US2491010A (en) * 1945-07-27 1949-12-13 Ohio Brass Co Electric switch having electromagnetic arc extinguishing means

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2935585A (en) * 1957-04-22 1960-05-03 Sigma Instruments Inc Polarized electromagnetic relay
US2929897A (en) * 1958-11-12 1960-03-22 Electrosnap Corp Sensing switch
US3402272A (en) * 1965-07-22 1968-09-17 Ite Circuit Breaker Ltd Dual path current limiting circuit breaker
US4319104A (en) * 1978-06-30 1982-03-09 Bbc Brown, Bovery & Company, Ltd. Movable contact unit for a direct-current, high-capacity circuit breaker

Also Published As

Publication number Publication date
FR66779E (fr) 1957-08-19
FR70849E (fr) 1959-09-01
DE1239386B (de) 1967-04-27
FR1077705A (fr) 1954-11-10
NL90894C (fr)

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