US2811605A - Circuit breaker - Google Patents

Circuit breaker Download PDF

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Publication number
US2811605A
US2811605A US397662A US39766253A US2811605A US 2811605 A US2811605 A US 2811605A US 397662 A US397662 A US 397662A US 39766253 A US39766253 A US 39766253A US 2811605 A US2811605 A US 2811605A
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United States
Prior art keywords
contacts
handle
closing
engagement
breaker
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
US397662A
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English (en)
Inventor
Paul M Christensen
Wiktor Dominik
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.)
Federal Electric Products Co
Original Assignee
Federal Electric Products Co
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
Priority to NL193015D priority Critical patent/NL193015A/xx
Application filed by Federal Electric Products Co filed Critical Federal Electric Products Co
Priority to US397662A priority patent/US2811605A/en
Priority to GB34706/54A priority patent/GB778952A/en
Priority to DEF16310A priority patent/DE1096471B/de
Priority to FR1124012D priority patent/FR1124012A/fr
Priority to ES0218930A priority patent/ES218930A1/es
Application granted granted Critical
Publication of US2811605A publication Critical patent/US2811605A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/529—Manual reset mechanisms which may be also used for manual release actuated by lever comprising an electroresponsive element forming part of the transmission chain between handle and contact arm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/046—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H using snap closing mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/501—Means for breaking welded contacts; Indicating contact welding or other malfunction of the circuit breaker

Definitions

  • cmcurr BREAKER Filed Dec. 11', 1955 ATTORNEYS United States Patent CIRCUIT BREAKER Paul M. Christensen, West Orange, and Dominik Wiktor, Newark, N. J., assignors to Federal EiiZC i ziQ Products Company, Newark, N. J., a corporation of Delaware Application December 11, 1953, Serial No. 397,662
  • the present invention relates generally to manually operated switches or circuit breakers and in particular to automatic circuit breakers.
  • an object of the present invention is the provision of means for assuring a consistent and quick closing action for effecting the engagement of the contacts of manually operated switches and circuit breakers, regardless of hesitancy or uneven manual operation by the operator.
  • Another object is to provide a quick make circuit breaker which is handle free during the closing operation thereof to close the contacts thereof.
  • Another object is to provide for a positive off or opening operation of a circuit breaker on manual opera-,
  • Another object is the provision in an automatic circuit breaker of means for providing an extra sharp blow to the mechanism thereof in order to open the contacts, especially in the event that the contacts stick together or have a light or superficial weld to each other.
  • a further object is the provision of means to assist in the accelerated opening of the contacts of a circuit breaker upon automatic operation thereof and also on manual operation where the handle is not held in position.
  • Fig. l is a side elevation of a circuit breaker pursuant to the present invention, a portion of the housing thereof being removed for purposes of illustration and the breaker being shown in the circuit open or interrupting condition thereof;
  • Fig. 2 is a view similar to Fig. 1 and illustrates an intermediate position through which the breaker mechanism passes during the closing operation of the breaker;
  • Fig. 3 is a view similar to Fig. l and illustrates the closed or circuit making condition of the circuit breaker
  • Fig. 4 is a fragmentary sectional view, on an enlarged scale taken on the line 4-4 of Fig. 1;
  • Fig. 5 is an enlarged fragmentary sectional view taken on the line 55 of Fig. 3;
  • Fig. 6 is an enlarged view of the obstructing element in the circuit breaker.
  • Fig. 7 is a fragmentary sectional view taken on the line 7-7 of Fig. 5.
  • circuit breaker 10 which is of the general type illustrated and described in Patent No. 2,647,186 to T. M. Cole, dated July 28, 1953, and in Patent No. 2,642,- 509, dated June 16, 1953 to T. M. Cole and P. M. Christensen, both of which are assigned to the assignee hereof.
  • the automatic circuit breaker 10 is provided with the body part 12 of a two part insulated casing or housing, the cover thereof being indicated at 14 in Figs. 4 and 5.
  • the circuit breaker mechanism 16 provided in said body part, as here shown, comprises the movable contact arm or switch member 18, mounted for pivotal movement, as hereinafter described in detail.
  • Said contact arm is provided with the movable contact 20, at one end thereof, for engagement with and disengagement from a companion stationary contact 22 provided on a solderless terminal connector 24.
  • the movable arm 18 is provided with a pivotally mounted actuator 26 which is in operative engagement with the handle or manual operating member 28 by means of a link 30 which forms a toggle with said handle.
  • the movable contact arm 18 is also provided with a current responsive or overload device, here shown as a bimetallic element or latch 32, the free end 44 of which is in latched engagement with the actuator 26 in the circuit making or closed condition of the mechanism, as illustrated in Fig. 3.
  • the latch is connected to the stab element 34, which constitutes the other terminal of the circuit breaker, by means of a flexible conductor 36.
  • the circuit breaker mechanism 16 is provided with electro-magnetic means for effecting the disengagement thereof, said means comprising an electromagnetic member 38 which is secured at one end thereof to the latch and to the movable contact member and which constitutes a rigid armature.
  • a spring 42 is interposed between the handle 28 and the movable member 18, as illustrated in Figs. 1, 2 and 3.
  • the bimetallic element 32 operates to latch the manually operable actuator 26 and to unlatch said actuator from the movable contact member 18, the unlatching taking place upon deflection of the bimetallic element 32 causing the disengagement of the free end 44 thereof from the bottom part 46 of the actuator 26 upon the occurrence of an overload, or under other abnormal predetermined current conditions in the circuit controlled by the circuit breaker.
  • spring 42 is effective to move the contact member 18 to its open position wherein the contact 20 is disengaged from the companion stationary contact 22.
  • the pivot for the movable contact member 18 is constituted by a helically coiled spring member 48, the opposite ends of which are mounted in bearing recesses provided in the casing parts 12 and 14. Said recesses 50 are beveled in a downward direction, as at 52, and in a lateral direction, as at 54, so as to facilitate the bowing of the spring pivot 48 in said directions.
  • Such spring pivot serves the purpose of resiliently pressing the contacts together and to compensate for contact wear and other variables, as disclosed in Patent 2,681,396 issued June 15, 1954, to Cole and Christensen.
  • a snap or anti-tease lever or obstructing member 56 which, as here shown, is generally of U- shape formation.
  • the lever 56 is provided with a slot 58 which extends into the arms 60 and 62 thereof.
  • the member 56 is mounted on the movable contact arm 18 by the engagement of a marginal edge projection 63 of the latter in the slot 58.
  • the main sring 42 of the circuit breaker serves to releasably position the member 56 during the closing operation of the breaker. More specifically, a spring seat is defined in the member 56 by the recessed portion 64 defined in the arm 60 and the crimped portion 66 defined in the opposing arm 62, said portions cooperating to seat one end of spring 42. It will be noted from Figs.
  • the lower end of the main spring 42 seats in the recess 64 and on the crimped portion 66, the spring 42 serving to releasably hold the member 56 in position to prevent the closing movement of the contact member 18, as in Figs. 1 and 2, and as hereinafter described in detail.
  • the body part 12 of the circuit breaker is provided with a camming surface 68 which terminates in a nose 70, which cooperates with said member 56, as hereinafter described to prevent temporarily the closing of the breaker.
  • the toggle has been conditioned in its overset condition.
  • the engagement of the contacts is effected by the snap-locking action of the toggle that provides a fulcrum about which bowed spring 48 can pivotally drive member 18 to provide a swift positive snap engagementof the contacts which is independent of the control of the operator.
  • continued opera ation of the handle 28 in the closing direction after obstruction element 68 is arrested by casing part 68-70 acts to bow and thereby stress spring 48, and that the closing of the contacts results from partial return of the spring to its unstressed-condition. A portion of the stress remains for providing contact pressure.
  • pivot spring 48 is desirable for assisting in the operation to relieve the temporary obstruction to the closing movement of the movable contact arm 18, it is not essential to the present invention since said action may be provided entirely by the engagement of the member 56 by the handle lug 75, or by an equivalent member operated by the handle.
  • the pivot spring 48 is bowed and moves contact member 18 in the direction of arrow 74 in Fig. 3, when the breaker is closed. In said condition, the pivot spring 48 exerts a greater force than the tensioned main spring 42 and thus provides a desired contact pressure by overcoming the opening action of the main spring.
  • the bimetal latch 32 re leases the actuator 26, the pivot spring returns to its relaxed condition and bodily moves the contact member 18 in a direction opposite the arrow 74. Consequently, if snap lever 56 was rigid with the contact arm 18, said snap lever might engage the shoulder or nose 70 and slow down the opening of the breaker.
  • the breaker might not open at all, or might open only partially since the spring 42 might not be strong enough to overcome the fracional forces resulting from the engagement of arm 60 of member 56 with the part 70 of the casing half 12 under the action of the pivot spring 48.
  • the slot 58 defined in the member 56 is made long enough to allow a limited movement of said member to easily bypass the shoulder 70 on the casing when the breaker is being opened. More specifically, the member 56 pivots in a counter-clockwise direction, viewing Fig. 3, on the marginal edge projection 76 of the contact member 18. Consequently, it will be readily apparent that said pivotal movement of the mem: ber 56 prevents the contact arm from being held against opening movement thereof.
  • This feature also provides added protection in case the main spring 42 should break or be. defective.
  • in the automatic opening of the breaker there is an extra sharp blow to open the contacts, which is an advantage in case the contacts should stick or have a light or superficial weld to each other, and also to assist in the accelerated opening of the breaker contacts upon automatic operation as well as upon manual operation of the handle.
  • the arm 62 of the member 56 is elongated so that it is positioned in the path of movement of the handle lug 77 in which the link 30 is pivotally mounted.
  • said lug 77 strikes an extra sharp blow, under the expansion of said spring, to the arm 62.
  • the bowed pivot spring 48 exerts a greater force than the tensioned main spring. Consequently, in the event that the handle 28 should be physically retained in position substantially as in Fig. 2, when the member 56 disengages the cam shoulder 7% on closing operation of the breaker, the pivot spring will be effective to bodily move the contact member 18 to snapengage the contacts and, therefore, to provide a breaker which is handle free during the closing thereof.
  • the breaker is also handle free upon automatic operation thereof.
  • the handle 28 is held in its closed-circuit position, as illustrated in Fig. 3, and if an abnormal current condition such as an overload occurs, the bimetallic latch 32 is automatically deflected so as to disengage and release the actuator 26. Consequently, the present invention provides an automatic circuit breaker which is handle free both on closing and on automatic tripping thereof.
  • the combined operation of the toggle and the bowed pivot spring 48 when the member 56 is disengaged from the cam surface portion 70 provides a quick-make action.
  • the operation of the handle 28 in striking the member 56 upon automatic opening assists the spring 42, to provide a quick-break action.
  • a circuit breaker comprising a housi g, a stationary contact, a movable switch member provided with a contact for engagement with and disengagement from said stationary contact, a manual operating member for effecting operation of said movable member to open and close said breaker, means conditioned by the closing operation of said operating member to provide a snapaction engagement of said contacts, a part in said housing, and said movable switch member being provided with means operable during the closing operation of said operating member and adapted to cooperate with said part to obstruct the engagement of said contacts substantially until the conditioning of said snap-action means, whereby to effect the closing of said contacts by said snap-action means, said obstructing means being actuated by said operating member to relieve the obstruction thereof, said part being stationary and adapted to be releasably engaged by said obstructing means to prevent temporarily the engagement of said contacts, said obstructing means being disengaged from said stationary part by said manual operating member, and said obstructing means having a portion actuated by
  • a circuit breaker comprising a housing, a stationary contact, a movable switch member provided with a contact for engagement with and disengagement from said stationary contact, a manual operating member for effecting operation of said movable member to open and close said breaker, means conditioned by the closing operation of said operating member to provide a snapaction engagement of said contacts, a camming surface in said housing, and a member pivotally mounted on said switch member for engagement with said camming surface during closing of the breaker to prevent temporarily the engagement of said contacts, said mounted member being pivoted by said manual operating member to disengage said camming surface substantially at the conditioning of said snap-action means whereby to effect the closing of said contacts by said snap-action means.
  • a circuit breaker comprising a housing, a stationary contact, a movable switch member provided with a contact for engagement with and disengagement from said stationary contact, a manual operating member for effecting operation of said movable member to open and close said breaker, means conditioned by the closing operation of said operating member to provide a snapaction engagement of said contacts, a camming surface in said housing, and a member pivotally mounted on said switch member for engagement with said camming surface during closing of the breaker to prevent temporarily the engagement of said contacts, said mounted member being pivoted by said manual operating member to disengage said camming surface substantially at the conditioning of said snap-action means whereby to effect c the closing of said contacts by said snap-action means,
  • said camming surface extending into the path of movement of said mounted member during the opening of the breaker, and said manual operating member having provision to pivot said mounted member during the opening of the breaker to clear said camming surface.
  • a circuit breaker comprising a housing, a stationary contact, a movable contact member engageable and disengageable therewith, a breaker handle, toggle means operated by said handle for effecting engagement of said contact and said contact member, a camming surface in said housing, a member pivotally mounted on said contact member and engageable with said camming surface to prevent the closing of said breaker, a flexible mounting for said movable contact member to effect bodily movement of said movable contact member substantially at the oversetting of said toggle means, whereby to disengage said preventing member from said camming surface to provide for snap engagement of said contact and contact member, and means for effecting pivotal movement of said preventing member during the opening of said breaker to clear said camming surface.
  • a circuit breaker comprising a housing, a stationary contact, a movable contact member engageable and discngageable therewith, a breaker handle toggle means operated by said handle for effecting engagement of said contact and said contact member, a camming surface in said housing, a member pivotally mounted on said contact member and engageable with said camming surface to prevent the closing of said breaker, a flexible mounting for said movable contact member to effect bodily movement of said movable contact member substantially at the oversetting of said toggle means, whereby to disengage said preventing member from said camming surface to provide for snap engagement of said contact and contact member, and means for effecting pivotal movement of said preventing member during the opening of said breaker to clear said camming surface, said last mentioned means being a portion of said preventing member which is actnated by said handle during the opening movement of said handle.
  • an automatic circuit breaker having a housing, a stationary contact, a movable contact member for engagement and disengagement therewith, an actuating member carried by said movable contact member, a current responsive device for operatively connecting said actuating member releasably to said movable contact member for operating the latter except when said current responsive device is disconnected from said actuating member upon overload, a handle for effecting manual operation of said actuator, a connection between said handle and said actuator for efiecting a snap-engagement of said contact and contact member and spring means operable to open said breaker to move said handle to an ofi position thereof, and to automatically reset said breaker after automatic operation thereof; the combination of means in said housing and means releasably positioned by said spring means and adapted to cooperate with said means in said housing to prevent temporarily the engagement of said contact and contact member substantially until the conditioning of said connection to snap engage said contact and contact member, said preventing means being pivotally mounted on said movable contact member and having a portion operated upon by said handle to pivot said preventing
  • a automatic circuit breaker having a housing, a stationary contact, a movable contact member provided with a contact for engagement with and disengagement from said stationary contact, manually operable means including a manual operating member operatively connected to said movable contact member for effecting manual operation of said movable contact member to open and close said contacts and spring means for effecting separation of said contacts upon operation of said manual operating member to open the breaker, that improvement which comprises means to positively move said movable contact member to disengage said contacts upon manual operation of said manual operating member to open the breaker, said last mentioned means comprising a part on said movable contact member extending into the path of movement of said manual operating member and acted upon by the latter during the opening movement thereof, said circuit breaker having means conditioned during the closing operation of said manual operating member to provide a snap-engagement of said contacts, a cooperating portion in said housing, and said part on said movable contact member being adapted to cooperate with said portion to prevent temporarily the closing of said breaker until the conditioning of said snapengagement means.
  • mechanism including control means for effecting automatic disengagement of said contacts upon the occurrence of predetermined current conditions, a handle for manually operating said mechanism to close and open the breaker, and means operable by said handle during breaker-opening movement thereof to exert a force in a direction to separate said contacts in the event that normal separation of said contacts is resisted, means conditioned in response to the closing operation of said mechanism to provide a snap-engagement of said contacts, and means operable to provide a temporary 0bstruction to prevent the engagement of said contacts until the conditioning of said snap-engagement means, whereby to effect the closing of said contacts by said snap-engagement.
  • An electric circuit breaker having a stationary contact, a movable contact member engageable and disengageable therewith, mechanism operable to engage said contacts, a breaker handle for operating said mechanism, a stationary part provided in said breaker, a member pivotally mounted on 'said contact member and engageable with said part to prevent the closing of said breaker, and a flexible mounting for said movable member to effect bodily movement of said movable contact member when said contact member is close to but out of engagement with said stationary contact, whereby to etfect the instantaneous engagement of said contact member with said stationary contact by causing said mounted member to shift out of engagement with said part.
  • An electric circuit breaker having relatively movable contacts engageable with and disengageable from each other for closing and opening the circuit, means automatically operable in response to load conditions of the circuit to disengage said contacts, mechanism operable to engage :said contacts, a handle mounted for movement in opposite directions, means to effect the operation of said mechanism by movement of said handle in one direction until said contacts are close to each other but out of engagement, and means to prevent the engagement of said contacts while they are close to each other, whereby the handle cannot be operated to teaseclose said contacts, said preventing means comprising a part pivotally mounted by said mechanism and a stationary part disposed in the path of movement of said pivotally mounted part to engage said mounted part during operation of said mechanism to close said contacts, said parts interacting with :said mechanism to cause the instantaneous complete and firm engagement of said contacts upon pivotal movement of said pivotally mounted part to disengage said stationary part upon continued movement of said handle after said parts are engaged, and said handle being movable in the opposite direction to effeet the operation of said mechanism to disengage said contacts
  • An electric circuit breaker having cooperable contacts, and operating mechanism for said contacts including a movable contact member operable to open and close the contacts, an operating handle movable between extreme positions in which said contacts are, respectively, open and closed, a drive mechanism interconnecting said handle and said movable contact member for progressively operating :said movable contact member toward its closed position as the handle is moved toward its closed position, means automatically operable in response to the load condition of the circuit to open the contacts, and ob struction means coacting with said mechanism and initially effective to arrest the advance of the movable contact member during said closing motion of :said handle and said obstruction means being thereafter released to allow closing of the contacts, said operating mechanism including 'yieldable spring means allowing said handle to advance despite arrest of said movable contact member and said spring means causing said snap-closing of the contacts after release of the movable contact member, said obstruction means including a fixed part in the circuit breaker and an obstructing element movable on said movable contact member and initially cooper
  • An electric circuit breaker including an enclosing housing, a pair of cooperable contacts and operating mechanism for said contacts within the housing, and a handle pivoted in the housing for operating said mechanism, said mechanism including a pivoted contact member, a current-responsive element and an actuator carried by said movable contact member and arranged for latching engagement when said circuit breaker is closed, toggle means connecting said handle and said actuator and arranged to progressively close and lock the contacts when the handle is moved from the open extreme to the closed extreme and effective to open the contacts when the handle is reversely operated between said extremes, said toggle acting before the full closing stroke of said handle is completed to condition said contacts.
  • said operating mechanism including yieldable spring means allowing the handle to complete its operating stroke in the closing direction, a V-shaped obstructing element rockably carried by said movable contact element, said obstructing element having one arm cooperable with a fixed part of said housing and effective to arrest the closing travel of the movable contact member and said V-shaped element having a second arm extending close to said operating handle, said operating handle having two spaced apart portions adapted to drive said second arm back and forth when said handle is operated in opposite directions.
  • one of said handle por- 10 tions being effective during the closing operation of said handle to drive said obstructing element to release said arrested movable contact member when conditioned for contact-closing, and the other of said handle portions being cooperable with said second arm of said obstructing element when the handle is moved in the opening direction to provide positive drive for said movable contact member in the opening direction, and a contact opening compression spring confined between said one handle portion and the arms of said V-shaped obstructing element and effective to bias said handle in the opening direction and to bias said obstructing element against said movable contact member in the direction for engagement with said fixed part of the housing.
  • An electric circuit breaker including an enclosing housing containing a pair of cooperable contacts, automatic current-responsive circuit breaker releasing means, and operating mechanism including a movable member for moving one of said contacts to open and close the circuit breaker, a handle operable between open and closed extremes for operating said mechanism and said mechanism including a spring enabling advance of the handle in the closing direction without concurrent contact-closing advance of said movable member, a movable element cooperable with said movable member and with said handle in both opening and closing strokes thereof, and a stationary part cooperable with said movable element during closing operation of the handle to arrest said movable member temporarily and said handle being thereafter effective to release said movable member to allow snap-closing of said contacts, and said handle being cooperable with said movable member via said element to provide contact-opening drive in the event of sticking of the contacts when the handle is moved in the opening irection.
  • An electric circuit breaker including a pair of cooperable contacts, operating mechanism for closing and opening said contacts, including a movable member, automatic current responsive contact-opening means and a manual member operable between open and closed extremes for opening and closing said contacts, said mechanism causing engagement of the contacts before the handle reaches its closed extreme and said mechanism including a spring enabling advance of said manual member to its closed extreme after initial engagement of the contacts, a two-armed element carried by said movable member, one of the arms of said element being cooperable with a stationary part of the circuit breaker to arrest closing advance of the movable member and said manual member thereafter having a drive connection to the second arm of said twoarmed element to discontinue said cooperation of said one arm and said stationary part and thereby release said member for snap-closing of the contacts, said manual member having a contact-opening connection to said second arm and thereby to said movable member in the event of sticking of the contacts.
  • An electric circuit breaker having cooperable contacts, and operating mechanism for said contacts including a movable contact member operable to open and close the contacts, an operating handle movable between open and closed extremes, a drive mechanism interconnecting said handle and said movable contact member for progressively operating said movable contact member toward its closed position as the handle is moved toward its closed position, said mechanism being arranged to provide initial engagement of the contacts before the handle has reached its closed extreme and said mechanism having spring means allowing further advance of the handle to the closed extreme after engagement of the contacts, means automatically operable in response to the load condition of the circuit to open the contacts, the combination with the foregoing of obstruction means coacting with said movable contact member and initially effective to arrest the advance of the movable contact member during the closing operation of said handle, said spring means being increasingly stressed during the arresting operation of said obstruction means, said spring means being effective to produce snap-closing of the contacts upon release of said obstruction means and said handle having drive connection to said obstruction means both in the closing and in the opening direction of operation of the handle and effective to release
  • a circuit breaker having cooperable contacts, and operating mechanism for said contacts including a moving contact member operable to open and close the contacts, an operating handle movable between extreme positions in which said contacts are, respectively, open and closed, a drive mechanism interconnecting said handle and said movable contact member and operable between open and closed extremes, a spring acting between said handle and said movable contact member for biasing both of said members in their contact-opening directions and said drive mechanism including toggle means and spring means arranged to cause initial engagement of the contacts when the handle is operated in the closing direction but before reaching the closed extreme and said toggle being thereafter efiective to overset and thereby lock the contacts closed and to stress said spring means for building contact pressure, that improvement in combination with the foregoing of means causing snap closing of the contacts and preventing sticking of the contacts, said last-named means including an element movable on said movable contact member and having an arm cooperable with said handle, said movable element being adapted to cooperate with a fixed portion of the circuit breaker during closing operation of said handle and being
  • a circuit breaker in accordance with claim 21 wherein said movable element is provided with a seat receiving said spring and said spring thereby biasing said movable element against said movable contact member and biasing the movable element toward cooperation with said fixed circuit breaker portion during closing operation of the handle.

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US397662A 1953-12-11 1953-12-11 Circuit breaker Expired - Lifetime US2811605A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL193015D NL193015A (enrdf_load_stackoverflow) 1953-12-11
US397662A US2811605A (en) 1953-12-11 1953-12-11 Circuit breaker
GB34706/54A GB778952A (en) 1953-12-11 1954-11-30 Automatic electric circuit breakers
DEF16310A DE1096471B (de) 1953-12-11 1954-12-04 Elektrischer Kipphebelschalter mit thermischer UEberstrom- und elektromagnetischer Schnellausloesung
FR1124012D FR1124012A (fr) 1953-12-11 1954-12-09 Perfectionnements apportés aux interrupteurs électriques
ES0218930A ES218930A1 (es) 1953-12-11 1954-12-10 Un interruptor de ciurcuito electrico

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US397662A US2811605A (en) 1953-12-11 1953-12-11 Circuit breaker

Publications (1)

Publication Number Publication Date
US2811605A true US2811605A (en) 1957-10-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
US397662A Expired - Lifetime US2811605A (en) 1953-12-11 1953-12-11 Circuit breaker

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Country Link
US (1) US2811605A (enrdf_load_stackoverflow)
DE (1) DE1096471B (enrdf_load_stackoverflow)
ES (1) ES218930A1 (enrdf_load_stackoverflow)
FR (1) FR1124012A (enrdf_load_stackoverflow)
GB (1) GB778952A (enrdf_load_stackoverflow)
NL (1) NL193015A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2901575A (en) * 1957-08-16 1959-08-25 Texas Instruments Inc Electrical switch
US2923795A (en) * 1957-07-03 1960-02-02 Fed Pacific Electric Co Multi-pole circuit breakers
US2975253A (en) * 1958-07-21 1961-03-14 Ite Circuit Breaker Ltd Contact arm kicker for circuit breakers
US3183325A (en) * 1961-05-03 1965-05-11 Fed Pacific Electric Co Trip indicating circuit breakers
US3500275A (en) * 1968-03-11 1970-03-10 Federal Pacific Electric Co Automatic circuit breakers
US3610856A (en) * 1970-08-25 1971-10-05 Federal Pacific Electric Co Molded case circuit breaker having an auxiliary contact separating spring
DE2343908A1 (de) * 1972-09-15 1974-03-21 Fed Pacific Electric Co Stromunterbrecher mit ueberstrom- und hilfs-ausloesung
EP0720192A1 (de) * 1994-12-23 1996-07-03 Heinrich Kopp Ag Vorrichtung zur Beschleunigung des Einschaltvorgangs zwischen elektrischen Kontakten

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2923788A (en) * 1957-07-03 1960-02-02 Fed Pacific Electric Co Circuit breakers
NL273896A (enrdf_load_stackoverflow) * 1961-01-24
DE1129223B (de) * 1961-02-09 1962-05-10 Continental Elektro Ind Ag Schaltschloss fuer elektrische Schalter, insbesondere Leitungsschutzschalter
DE1140271B (de) * 1961-03-24 1962-11-29 Licentia Gmbh Mechanismus fuer Installationsselbstschalter
DE1178500B (de) * 1962-03-09 1964-09-24 Stotz Kontakt Gmbh Schaltmechanismus mit Momenteinschaltung fuer Installationsselbstschalter
CN107369593B (zh) * 2017-06-08 2023-11-10 乐清市智顺电气有限公司 一种断路保护开关的操作机构

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US2013827A (en) * 1934-02-23 1935-09-10 Westinghouse Electric & Mfg Co Circuit interrupter
US2070305A (en) * 1934-01-03 1937-02-09 Westinghouse Electric & Mfg Co Circuit interrupter
US2126412A (en) * 1937-01-12 1938-08-09 Trumbull Electric Mfg Co Circuit breaker
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US2214695A (en) * 1938-03-19 1940-09-10 Westinghouse Electric & Mfg Co Circuit breaker
US2306235A (en) * 1941-08-06 1942-12-22 Gen Electric Circuit breaker
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US2320355A (en) * 1940-01-19 1943-06-01 Bulldog Electric Prod Co Circuit breaker
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US2343264A (en) * 1942-11-06 1944-03-07 Bulldog Electric Prod Co Switch
US2357151A (en) * 1943-04-10 1944-08-29 Gen Electric Circuit breaker
US2416266A (en) * 1944-11-29 1947-02-18 Wadsworth Electric Mfg Co Inc Circuit breaker
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CA468174A (en) * 1950-09-19 Canadian Westinghouse Company Electric circuit interrupters
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US2692926A (en) * 1952-09-06 1954-10-26 Fed Electric Prod Co Multipole circuit breaker
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CA468174A (en) * 1950-09-19 Canadian Westinghouse Company Electric circuit interrupters
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US2013827A (en) * 1934-02-23 1935-09-10 Westinghouse Electric & Mfg Co Circuit interrupter
US2158369A (en) * 1935-03-25 1939-05-16 Square D Co Electric switch
US2126412A (en) * 1937-01-12 1938-08-09 Trumbull Electric Mfg Co Circuit breaker
US2214695A (en) * 1938-03-19 1940-09-10 Westinghouse Electric & Mfg Co Circuit breaker
US2320355A (en) * 1940-01-19 1943-06-01 Bulldog Electric Prod Co Circuit breaker
US2310854A (en) * 1941-07-10 1943-02-09 Westinghouse Electric & Mfg Co Circuit breaker
US2306235A (en) * 1941-08-06 1942-12-22 Gen Electric Circuit breaker
US2332496A (en) * 1942-01-28 1943-10-26 Westinghouse Electric & Mfg Co Circuit breaker
US2426880A (en) * 1942-03-23 1947-09-02 Square D Co Circuit breaker
US2343264A (en) * 1942-11-06 1944-03-07 Bulldog Electric Prod Co Switch
US2357151A (en) * 1943-04-10 1944-08-29 Gen Electric Circuit breaker
US2416266A (en) * 1944-11-29 1947-02-18 Wadsworth Electric Mfg Co Inc Circuit breaker
US2666114A (en) * 1951-03-24 1954-01-12 Square D Co Circuit breaker
US2697765A (en) * 1951-05-18 1954-12-21 John L Little Power interrupter for electrical appliances
US2660643A (en) * 1951-10-16 1953-11-24 Westinghouse Electric Corp Circuit breaker
US2692926A (en) * 1952-09-06 1954-10-26 Fed Electric Prod Co Multipole circuit breaker
US2681397A (en) * 1953-01-02 1954-06-15 Bulldog Electric Products Co Circuit breaker
US2700713A (en) * 1953-07-10 1955-01-25 Fed Electric Prod Co Automatic circuit breaker

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Publication number Priority date Publication date Assignee Title
US2923795A (en) * 1957-07-03 1960-02-02 Fed Pacific Electric Co Multi-pole circuit breakers
US2901575A (en) * 1957-08-16 1959-08-25 Texas Instruments Inc Electrical switch
US2975253A (en) * 1958-07-21 1961-03-14 Ite Circuit Breaker Ltd Contact arm kicker for circuit breakers
US3183325A (en) * 1961-05-03 1965-05-11 Fed Pacific Electric Co Trip indicating circuit breakers
US3500275A (en) * 1968-03-11 1970-03-10 Federal Pacific Electric Co Automatic circuit breakers
US3610856A (en) * 1970-08-25 1971-10-05 Federal Pacific Electric Co Molded case circuit breaker having an auxiliary contact separating spring
DE2343908A1 (de) * 1972-09-15 1974-03-21 Fed Pacific Electric Co Stromunterbrecher mit ueberstrom- und hilfs-ausloesung
JPS4968279A (enrdf_load_stackoverflow) * 1972-09-15 1974-07-02
EP0720192A1 (de) * 1994-12-23 1996-07-03 Heinrich Kopp Ag Vorrichtung zur Beschleunigung des Einschaltvorgangs zwischen elektrischen Kontakten

Also Published As

Publication number Publication date
GB778952A (en) 1957-07-17
FR1124012A (fr) 1956-10-02
DE1096471B (de) 1961-01-05
ES218930A1 (es) 1955-03-16
NL193015A (enrdf_load_stackoverflow)

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