US2662949A - Multipole circuit breaker - Google Patents

Multipole circuit breaker Download PDF

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Publication number
US2662949A
US2662949A US181224A US18122450A US2662949A US 2662949 A US2662949 A US 2662949A US 181224 A US181224 A US 181224A US 18122450 A US18122450 A US 18122450A US 2662949 A US2662949 A US 2662949A
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Prior art keywords
circuit
movement
circuit breaker
movable contact
contact member
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US181224A
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Inventor
Paul M Christensen
Alexander R Norden
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Federal Electric Products Co
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Federal Electric Products Co
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Priority to NL95538D priority Critical patent/NL95538C/xx
Priority to NLAANVRAGE7306077,A priority patent/NL173976B/xx
Application filed by Federal Electric Products Co filed Critical Federal Electric Products Co
Priority to US181224A priority patent/US2662949A/en
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Publication of US2662949A publication Critical patent/US2662949A/en
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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
    • H01H71/1009—Interconnected mechanisms

Definitions

  • This invention relates to multi-pole circuit breakers and to tripping and actuating devices therefor. 'More particularly, but without restriction, the invention is related to multi-pole circuit breakers of the general type disclosed in the copending application of Paul M. Christensen, Ser. No. 181,223 led August 24, 1950, assigned to the assignee hereof, and is concerned with a multi-pole circuit breaker which can be manually opened and closed and which is also opened automatically at all of the poles upon the occurrence of an overload in the circuit at any one of the poles.
  • the primary object ci the present invention is the provision of a multi-pole circuit breaker of the above mentioned type, which is of generally improved operation and construction.
  • Another object is the provision of a multi-pole circuit breaker which is opened automatically at all of the poles thereof upon the occurrence of an overload in the circuit at any one pole and which is automatically reset, upon the tripping thereof,
  • Fig. 1 is a side View of a circuit breaker embodythe present invention
  • Figs. 2 and 3 are end views as seen from the lines i-Z and 3.-3, respectively, of Fig. 1;
  • Fig. 4 is a top view of the circuit breaker
  • Fig. 5 is a view similar to Fig. 1, one part of 'the housing being removed, the circuit breaker mechanism being closed or in circuit making condition;
  • Fig. 6 is a sectional view taken on the line E-B of Fig. 5
  • Fig. 'i' is a sectional View taken on the line 5-1 of Fig. 5;
  • Fig. S is a sectional view taken on the line 8-8 of Fig. 6;
  • Fig. 9 is a sectional view taken on the line 9-9 of Fig. 6,'
  • Fig. 10 is a sectional view taken i-I ofFig. 5;
  • Fig. 11 is a sectional li-l of Fig. 6;
  • Fig. 12 is a sectional l2-I2 of Fig. 6;
  • Fig. 13 is a sectional zS-I3 of Fig. 6;
  • Fig. 14 is a sectional llS-I of Fig. 6;
  • Fig. 15 is a sectional z-i ofFig. 5;
  • Fig. 16 is a fragmentary sectional view taken on the line i--IG of Fig. 5;
  • Fig. 17 is a fragmentary sectional view taken on the line I'i-l 1 of Fig. 5;
  • Fig. 18 is a partial View similar to Fig. 5 showing the circuit breaker mechanism L1 the open condition thereof
  • Fig. 19 is a fragmentary sectional View taken on the line IS-l E3 of Fig. 18;
  • Fig. 20 is a View similar to Fig. 18 showing another position of the circuit breaker mechanism in the open condition thereof;
  • Fig. 21 is a fragmentary sectional View taken on the line 2 l-2l of Fig. 20;
  • Fig. 22 is a fragmentary sectional view taken on the line 22-22 of Fig. 21.
  • the circuit breaker of the present invention comprises a housing formed by the casings 32 and 34, each of which houses a separate circuit breaker mechanism.
  • Casing 32 comprises the body part 36 provided with the cover and casing S4 coinprises the body part Iii! and the cover part t2, all of said parts being preferably molded from any suitable plastic, for example, Bakelite
  • the casings 32 and 34 are secured together in laterally disposed relation in any suitable manner, as by the bolts Liri which extend through both casings, as illustrated in Figs.
  • the circuit breaker is of the plug-in type for use with a terminal plate assembly such as that described in application Ser. No. 127,432 led November 15, 1949, by Thomas M. Cole and 'Paul M. Christensen, as joint inventors and assigned to the assignee hereof. It will be understood, however, that the present invention is not limited to plug-in circuit breakers but is applicable as well to circuit breakers which are not provided on the line view taken on line View taken on t line View taken on the line View taken on the line View taken on the line with plug-in terminals.
  • the casings 32 and 34 are provided, at one end thereof, with an open recess l! formed in the respective body parts, and adapted to engage a hooked element of the terminal plate assembly.
  • each of said casings is provided with a re-entrant lower portion 52 formed in both the body parts and the cover parts thereof, and adapted to encompass the side and a portion of the top surface of a contact block unit of said terminal plate assembly when mounted thereon.
  • Each casingV is provided, above the re-entrant portion 5.2 there,- of, with a chamber 5.', in which there is vertically mounted a plug-in terminal prong or stab. contact ⁇ 5B for making contact with said terminal block unit.
  • Said contact Sli is provided with the laterally extending portions or arms 5l which are removably positioned in cooperating recesses 59 formed in the walls of said chamber.
  • Each casing is provided, above the open recess d Ell therein, with an arcing chamber 58 in which the stationary contact E@ and movable contact 62 are disposed for relative movement.
  • said arcing chambers are each bounded by the similarly thickened portions 6i, 63 and ad of the body parts 36- and d, respectively, and by the portions @t of said body parts which are of reduced thickness and which extend between the portions 63 and 6d thereof.
  • portion tid is provided with a shoulder et where it extends above portion te and that portion 63 is provided with an angular step 16 where it extends above said portion e6.
  • the cover parts 38 and yd2 are each provided on its surface, which faces its companion body part, with a thickened portion 12 (Figs. 9, 12 and 16) which is complementary in form to the portion 66.
  • a thickened portion 12 Figs. 9, 12 and 16
  • the ends la and it of said portion i2 abut the step 'm and the shoulder 58, respectively, as illustrated in Fig. 16, and said portion together with portion 56, the confronting surfaces of which are spaced as at i8, form a bounding wall for the arcing chamber in opposition to the wall thereof formed by the thickened portion 6l.
  • each casing is provided with an arcing chamber which is closed on all sides thereof except at its opening 80 externally of the casing whereby arcs which may be formed upon the disengagement of contacts te and 62 are to a very considerable extent prevented from entering that portion of the casing in which the circuit breaker mechanism is contained.
  • a chamber 32 is provided in casing 32 for containing the circuit breaker mechanism S4 thereof and a similar chamber 86 is formed in casing 315 for containing the circuit breaker mechanism 36 thereof.
  • Each of said chambers is provided with an opening et which extends throughA the body part in which said chamber is defined, a handle 92; projecting, from casing 32 and a similar handle ali projecting from casing 34.
  • Said handles are each formed of insulation material, one of said handles, here shown as ed, being provided with a laterally extending pin 96 (Fig. '7) which is received in a companion recess s3 formed in handle 92 to provide for the conjoint operation of said handles.
  • Handle S2 is provided with a circular pivot portion le@ which is positioned in the bearing recess 102 formed in cover part 38
  • handle S4 is provided with a similar pivot portion IM which is positioned in the bearing recess IDE formed in the body part 4B.
  • Handle 92 is also provided with the laterally extending circular pivot portion m3, positioned in the bearing recess il@ (Figs. 1 and l0) formed in body part 3B, and handle gli is provided with a similar pivot portion H2 positioned in the bearing recess H4 formed in the cover part d2.
  • the circuit breaker mechanisms 313 and 83 are the same and, therefore, a detailed description of one of said mechanisms will be suiiicient to describe both of said mechanisms.
  • the circuit breaker mechanism includes a manual operable member, here shown as the above mentioned pivoted handle 92 or 913.
  • a uniplanar movable contact member H6 is mounted in the chambers B2 and B, respectively, for pivotal movement by pivot pin HB, the opposite ends of which are received in the aligned bearing projections Idil on the opposing surfaces of each of the casing parts of casings 32 and 34.
  • the movable contact member is provided with the previously mentioned contact S2 which is engageable With and disengageable from the companion contact E@ carried by the terminal member 22 which is mounted in an open recessed portion i251 formed in each of the casings above the arcing chambers 58 thereof.
  • the terminal member A22 is provided with a terminal screw
  • the aforementioned complementary casing portions 55 and i2 form a guideway for the movable contact member, the space 'i8 between the confronting surfaces thereof dening a guide slot through which an end portion
  • the movable contact member is provided with an integral depending portion
  • the free end of bi-metallic strip 135 is arranged to releasably engage a latch element
  • the lever IM is formed in one piece of sheet metal and comprises laterally spaced opposing walls M2, H12 open between the marginal edges Utd, ldd thereof, and partially closed between the opposite marginal edges Idt, E46 thereof,y by the integral wall Hi8 (Fig. 6) provided With the opening 15E) defined therein.
  • the aforementioned latch 38 is provided on said wall Hi8 and depends below the opposing walls m2, M2 of said lever. Said walls are provided with the confronting punched-in cylindrical projections 152 (Fig. 15) which are mounted for pivotal movement in an insulated bushing 15d mounted in an aperture 1.56 provided in the movable contact member H6 at the aforementioned opposite end thereof.
  • said bushing is provided with portions which overlie side surface portions of the movable contact member and that one of said bushing portions is provided with a part
  • Each of said side Walls is also provided, at the end thereof remote from the latching element 38, with a slotted portion
  • wall is also provided with a depending hooked element
  • Each handle is provided with an integral portien il which extends below the pivot portions thereof.
  • 72 are each provided with a g aperture I'Id (Fig. 21).
  • 75 is a floating ball or universal link lie formed of insulated material and provided with the laterally extending portions it in each of which there is mounted a pin iii?.
  • the interlocked, abutting casing portions and E are each apertured as at
  • 88 is operatively interposed between the movable Contact member l it and each of the handles for biasing the movable contact member to its open position.
  • One end of said spring engages a lug Hit carried by the handle and the other end of said spring engages a lug it? integral with the movable contact member ile.
  • a detent member ist extends outwardly from the bearing projections
  • 36 operates to latch the companion manually operable actuating mechanism lin to the movable contact member H6 and to unlatch the actuating mechanism from the movable contact member, unlatching taking place upon denection of member 35 causing the disengagement of end
  • the handle portion '32 in which the spring portion iig is mounted, is moved counterclockwise from the approximately vertical disposition thereof, as in Fig. 18, toward the inclined position thereof as in 5.
  • 69 are carried forwardly and downwardly whereby to latch end it@ of member
  • the portion V38 oi the spira.. link member is positioned close to the portion thereof, as illustrated in 13, to compress said spiral spring for providing a contact pressure, the tension of which spring is greater than the bias of the compressed spring tijd.
  • pivot portion iid of s constitute the centers breaker mechanism. 2.-. the circuit breakers 5,7 posed to the right of the n pivot and pin in the open condition (Fig. 18), portion to f seid cent rline. In said closed condition, t bias exerte. ⁇ through the toggle is eieotive to in ntain both mechanisms in closed condition, the link interengaging said mech ms being releasably retained movement relative thereto and disposed as G.
  • the circuit breaker of the present invention is of the trip-free type will trip even if the handle is retained in the on position. With the handle so retained, the strip E35 flexes upon occurrence oi an overload in one of the circuits i..
  • lever iet pivots the movable contact meinber lit in a counter-clockwise direction tov disengage contacts @il and 5.2.
  • lever iii@ is freed for clockwise rotation, pin i532? moving into slot 35, and horns if@ engaging the movable contact member, as previously described. Due to said movement of the pin in the tripped circuit breaker, the ball link llt is free to pivot, as in Fig.
  • e breaker will assume the positions illustrated in Figs. 20 to 22. It will be noted that in said positions, the handle is short of the full oil position thereof and the horns 68 of the lever in the overloaded circuit are in frictional engagement with the movable contact member thereof, the lever it@ in the other circuit breaker being in proper position as in Fig. 22.
  • the handle is moved to the full olf position, as in Fig. 1S, to disengage the horns of the engaged lever, whereupon the circuit breaker components are all in correct position for movement or the handles to the on" position.
  • the movable contact members are also provided with a general circular peripherally interrupted aperture Zai and a tapered pin 2te for calibrating the circuit breaker mechanism, it being understood that said calibrating means is effective to vary the amount of overlap of the latch element itil at the end 193 ofv theA flexible member 53e.
  • the thermal member l is connected in series with the movable contact member lit and the circuit which is to be controlled by the circuit breaker.
  • a flexible metallic conductor or connector 2% is connected to said thermal element and extends through an opening let in the wail portion 2l@ which separates the chamber containing the circuit breaker mechanism from the chamber in which the stab contact ce is mounted, for connection to said stab Contact which makes contact with the power line in the terminal panel assembly of the copending application described above.
  • the thermal current responsive member it is preferably operable, not only in response to the heating eect of the current passing therethrough but is also operable under the control of electromagnetic means for effecting disengagement of the companion relatively movable contacts til and t2, and the arrangement is preferably such that, as here shown, the electromagnetic means is energized by the current which passes through the said thermal responsive member.
  • an electromagn netic member Zit is nxedly secured, preferably by welding, or in other suitable manner, on member 13B near the free end thereof and a companion rigid armature 2id is disposed in spaced confronting relation to electromagnetic member 2l2.
  • magnetic member Zl straddles member 23S by which it is carried.
  • Said member 2i2 is formed in one piece of soft sheet steel or other suitable sheet materialand is provided with the depending portions 2 it which are arranged in surface confronting relation to the adjacent surface of armature 2 iii.
  • armature 2 ill is provided with a slotted portion 2 i8, opposite the free end thereof, which is aligned with slot ite in mem er 36.
  • the armature is secured to the fined end of member i3d, preferably by welding, and side portions 22e thereof are bent upwardly and abut the marginal side edges of ⁇ member itt, the depending portion 132 of member i i6 extending through said aligned slots and being riveted to the outer surface of the armature.
  • the electromagnetic member 212 and the armature 2li operate substantially in the same way as corresponding mechanism in U. S. Patent Re. 23,188.
  • a multi-pole circuit breaker having a circuit breaker mechanism for each circuit, each mechanism being biased for movement from the circuit-closed condition to the circuit-open condition thereof, means inter-engaging said mechanisms and releasably retained from movement relative thereto in the circuit-closed condition thereof, said interengaging means including means operative thereupon for biasing said mechanisms in said circuit-closed condition in opposition to the first mentioned bias thereon, and means for eiecting relative movement between said inter-engaging means and said mechanisms upon the occurrence of a predetermined current in one of said circuits whereby to relieve said opposing bias sufficiently for said circuit breakers to be moved to the circuit-open condition thereof,
  • a multi-pole circuit breaker having a circuit breaker mechanism for each circuit, each mechanism being biased for movement from the circuit-closed condition to the circuit-open condition thereof, resilient means, link means universally mounted in said resilient means and interconecting said mechanisms, said resilient means and said linking means constituting a toggle, said linking means being releasabiy retained in predetermined disposition in the circuit-closed condition of said mechanism whereby said toggle biases said mechanism in opposition to bias thereon, and means freeing said linking means to move from said disposition thereof relatively to at least one of said mechanisms upon the occurrence of a predetermined current in the circuit of said one mechanism for operating said toggle whereby to move said circuit breakers to the circuit-open condition thereof.
  • a multi-pole circuit breaker having a plurality of circuit breaker mechanisms each biased ior movement from the circuit-closed condition to the circuit-open condition thereof and each provided with a pivotally mounted operating meriber, said members being joined for conjoint operation; a resilient member connected to operating members and mounted for movement thereby to and from the operative position thereof, means mounted for universal movement by said resilient member inter-engaging said mechanisms and releasably retained from movement relative thereto in the circuitclosed condition thereof, said resilient member when moved to the operative position thereof biasing said mechanisms through said inter-engaging means in opposition to the bias thereon, and means freeing said linking means for pivotal movement upon the occurrence of predetermined current in one of the circuits whereby to relieve said opposing bias sufnciently for said circuit breakers to be moved to the circuitopen condition thereof, said inter-engaging means comprising a ball lever mounted for universal movement in said resilient means and having laterally extending portions engageable with said mechanisms.
  • a multi-pole circuit breaker having a pair of circuit-breaker mechanisms each having a stationary contact, a movable contact member engageable and disengageable therewith and normally biased for movement from the oi'cuitclosed to the circuit-open condition thereof, manually operable actuating -leans for effecting the engagement thereof, and a control member for eiifecting the disengagement thereof;
  • said actuating means comprising a lever pivotally mounted on said contact member releasably connected thereto said control member .
  • said circuit-closed condition a link mounted for universal movement and retained against said movement in the circuit-closed condition of the circuit breaker by releasable engagement between said levers, and a resilient member in which said link is mounted for biasing said mechanisms in opposition to bias thereon, said releasable engagement of link said levers including lost motion connections for said movement of said link upon release of one of said levers upon the occurrence of predetermined current in the circuit of the mechanism of said one lever whereby to relieve saii
  • a multi-pole circuit breaker having a pair of circuit-breaker mechanisms each having a stationary contact, a movable contact member engageable and disengageable therewith and normally biased for movement from the circuit-closed to the circuit-open condition thereof, manually operable actuating means for eifecting the enga-gement thereof, and a control member for effecting the disengagement thereof;
  • said actuating means comprising a lever pivotally mounted on said contact member and releasably connected thereto by sai control me i-- ber in said circuit-closed cor on, a link mounted for universal movement and retained against said movement in the circuit-closed con ⁇ dition of the circuit breaker by releasable engagement between said levers, a resilient member in which said link is mounted for biasing said mechanisms in opposition to the bias thereon, said releasable engagement of se d link and said levers including lost motion connections for said movement of upon release of one of said levers upon the occurrence of predetermined current the circuit of the mechanism
  • le circuit-breaker having a plurality Y nvms each having a stationary contact, a movable contact member cngag'eable and disengageable therewith, actuating means for operatively effecting the engagement thereof and a control member for effecting the disengagement thereof in response to predetermined current in the circuit, said movable member being biased for movement from the circuit closed to the circuit open position thereof, said control member being bodily carried by said movable member and said actuating means releasably connected thereto pivotally carried thereby and being in fsaid circuit closed condition by said control member link means mounted between said actuating means' and retained against move'- inent relative thereto in the circuit-closed con-l dition of said mechanisms, resilient means carrying said link means for biasing said mechanisms in opposition to the bias thereon, and lost motion connections between said link means and said actuating means' operable upon release of one or said actuating means by the companion control member to relieve said opposing bias for moving said mechanisms to the open condition thereof.
  • a multi-pole' circuit breaker having a plurality of mechanisms each having a stationary contact, a movable contact member engageable and'disengageable therewith, actuating means for operatively effecting the engagement thereof and a control member for eiecti'ng the disengagement thereof in response to predetermined cur "1"* in the circuit
  • said movable member bewill: ing biased for movement from the circuit closed to the circuit open position thereof, said control member being bodily carried by said movable member and said actuating means being pivotally carried thereby and releasably connected thereto in said circuit closed condition by said control member link means mounted between said actuating ineens and retained against movement relative thereto in the circuit-closed condition of said mechanic; i, resilient means carrying said link means 'for biasing said mechanisr'ns in opposition to the bias thereon, and lost motion connections between said link means and said actuating means operable upon release of one oi said actuating means by the companion control member to relieve said opposing
  • a multi-pole circuit breaker having a plurality of mechanisms each having a stationary Contact, a movable contact member engageabl'e and disengageable therewith, actuating means for operatively effecting the engagement thereof and a control member for effecting the disengagement thereof in response to predetermined current in the circuit, said movable member being biased for movement from the circuit closed to the circuit open position thereof, said control member being bodily carried by said movable member and said actuating means being pivotally carried thereby and releasably connected thereto in said circuit closed condition by said control member a universal joint mounted between said actuating means and retained against movement relative thereto in the circuitclosed condition of said mechanisms, resilient means carrying said joint for biasing said mechanisms in opposition to the bias thereon, and means freeing said joint for movement relative to said actuating means upon release of one or' said actuating mea-ns by the companion control member whereby to relieve said opposing for moving said mechanisms to the open condition thereof, said resilient means sing a spiral.
  • spring member and said joint being a ball link mounted for universal movement therein, said ball link having laterally extending parts and said jointfreeing means being a slot defined in each actuating means and having a constricted portion, said parts being retained in said constricted portions in the circuit-closed condition and being released therefrom for movement into at least one of said slots upon said. disengagement of strip.
  • Actuating means for a multi-pole circuit breaker having a plurality of movable contact members normally biased for movement to circuit-open condition and each provided with a lever pivotally mounted thereon and carrying a flexible member in normal engagement with said lever to prevent relative pivotal movement, comprising resilient means mounted. for movement to and from an operative position for biasing said movable members to circuit closed condition, and link means carried by said resilient means' and normally movable relative thereto, said link means being retained by said levers against said movement in the circuit-closed condition and being released for movement upon the disengagement of a flexible member from its companion lever for relieving the bias of said resilient means whereby the normal bias of said movable members is eective to move the latter to said circuit-open condition.
  • Actuating means for a multi-pole circuit breaker having a plurality of movable contact members normally biased for movement to circuit-open condition and each provided with a lever pvotally mounted thereon and carrying a flexible member in normal engagement with said lever to prevent relative pivotal movement, comprising pivotally mounted operating means, resilient means mounted for movement thereby to and from an operative position for biasing said movable members to circuit-closed condition, and link means carried by said resilient means and normally movable relative thereto, said link means being retained by said levers against said movement in the circuit closed condition and being released for movement upon the disengagement of a flexible member from its ccmpanion lever for relieving the bias of said resilient means whereby the normal bias of said movable members is effective to move the latter to said circuit-open condition.
  • Actuating means for a multi-pole circuit breaks' having a plurality of movable Contact members normally biased for movement to circuit-open condition and each provided with a lever pivotally mounted thereon and carrying a flexible member in normal engagement with said lever to prevent relative pivotal movement, comprising resilient means mounted for movement to and from an operative position for biasing said movable members to circuit-closed condition, and link means carried by said resilient means and normally movable relative thereto, said link means being retained by said levers against said movement in the circuit-closed condition and being released for movement upon the disengagement of a flexible member from its companion lever for relieving the bias of said resilient means whereby the normal bias of said movable members is eiective to move the latter to said circuit-open condition, said levers each having deiined therein a slot provided with a restricted portion, said link means comprising a ball member having laterally extending parts each retained in a restricted portion in the circuit-closed condition and released therefrom for movement into at least one of said slots upon said disengagement or"
  • a multi-pole circuit breaker having a plurality of movable contact members normally biased for movement to circuit-open condition and each provided with a lever pivotally mounted thereon and carrying a flexible member in normal engagement with said lever to prevent relative movement
  • a multi-pole circuit breaker having a plurality of movable Contact members normally biased for movement to circuit-open condition each provided with a lever pivotally mounted thereon and carrying a exible member in normal engagement with said lever to prevent relative movement
  • the combination with said levers ci pivotally mounted operating means resilient means mounted for movement thereby to and from an operative position for biasing said movable members to circuit-closed condition
  • link means carried by said resilient means and normally movable relative thereto said link means being retained by said levers against positive movement in the circuit closed condition and being released for positive movement upon the disengagement of a flexible member from its companion lever for relieving the bias oi said resili nt means whereby the normal bias or said movable members is effective to move the latter to said circuit-open condition.
  • a pair of casings each adapted to contain a circuit breaker mechanism, said casings being disposed in surface abutting disposition, the abutting surfaces thereof being provided with aligned apertured portions, and means mounted for universal movement said apertures and extend- .ing therefrom for engagement with said mechanisms for ccncomitantly actuating the latter.
  • a multi-pole circuit breaker having a pair of circuit-breaker mechanisms each having a stationary contact, movable contact member engageable and disengageable therewith and normally biased for movement from the circuitclosed to the circuit-open condition thereof, manually operable actuating means for eiiecting the engagement thereof, and a control member for eirecting the disengagement thereof;
  • said actuating means comprising a lever pivotally mounted on said contact member and releasably connected thereto by said control member in said circuit-closed condition, a link mounted for universal movement and retained against said movement in the circuit-closed condition of the circuit breaker by releasable engagement between said levers, a resilient member in which said link is mounted for biasing said mechanisms in opposition to the bias thereon, said releasable engagement of said link and said levers including lost motion connections for said movement of said link upon release of one of said levers upon the occurrence of predetermined current in the circuit or the mechanism of said one lever whereby to relieve said opposing bias suiciici
  • a multi-pole circuit breaker pair of circuit-brosser .echanisms each having a stationary Contact, a movable contact member engageable and disengageable therewith and normally biased for movement from the circuitclcsed to the circuit-open condition thereof, manually operable actuating means for effecting the engagement thereof, and a control member for effecting the disengagement thereoi;
  • said a"- tuating means comprising a lever pivotally mounted on said contact member and releasably connected thereto by said flexible member in said circuit-closed condition, a link mounted for universal movement and retained against said movement in the circuit-closed condition of the circuit breaker by releasable engagement between said levers, a resilient member in which said link is mounted for biasing said mechanisms in opposition to the bias thereon, said releasable engagement oi said link and said levers including lost motion connections for said movement of said .fr upon.
  • a multi-pole circuit breaker having a pair of circuit-breaker mechanisms each having a stationary contact, a movable contact member engageable and disengageable therewith and normally biased for movement from the circuitclosed to the circuit-open condition thereof, manually operable actuating means for effecting the engagement thereof, and a control mercber for effecting the disengagement thereof;
  • said actuating means comprising a lever pivotally mounted on contact member: and roleasably connected thereto by said control m ber in said circuit-closed condition, a link mounted for universal movement and retained against said movement in the circuit-closed condition of the circuit breaker by reieasable engagement between said levers, a resilient meniber in which said link is mounted for biasing said mechanisms in opposition to the bias thereon, said releasable engagement of said li k and said levers including lost motion connections for said movement of said link upon release of one of said levers upon the occurrence ci predetermined current in the circuit of the mechanism having of said one lever whereby to relieve
  • a multi-pole circuit breaker having a movable contact member for each pole, an actuator for each movable contact member, a control device for each movable contact member to connect the companion actuator releasably thereto and to disconnect the actuator from the companion movable contact member, means for moving the released contact member to circuitinterrupting position, and universal joint means interconnected between said actuators and operable upon release oi one of said movable contact members from its actuator under the control of the control device at one pole to effect movement of a contact member at another or said poles to its circuit-interrupting position, said universal joint means including spring means acting on each movable contact member to provide contact pressure at each pole the circuit-'closed condition oi the circuit breaker.
  • a multi-pole circuit breaker having a movable contact member for each pole, an actuator 'for each movable contact member, a control device for each movable contact member to connect the companion actuator releasably thereto and to disconnect the actuator from the companion movable Contact member, means for moving the released contact member to circuitinterrupting position, and means interconnected betr/een said actuators and operable upon release of one of said movable contact members from its actuator under the control of the control device at one pole to effect movement of a contact member at another or" said poles to its circuit-interrupting position, said interconnected means including a lost-motion connection at each actuator so that movement of the released actuator at one pole is not impeded by a non-released actuator at another pole.
  • a multi-pole circuit breaker having a movable contact member for each pole, an actuator for each movable contact member, a control device for each movable contact member to connect the companion actuator releasably thereto and to disconnect the actuator from the companion movable contact member, means for moving the released contact member to circuitinterrupting position, and universal joint means interconnected between said actuators and operable upon release or one of said movable contact members from its actuator under the control of the control device at one pole to effect movement oi a contact member at another of said poles to its circuit-interrupting position, said universal joint means including a lost-motion connection at each actuator so that movement or the released actuator at one pole is not impeded by a non-released actuator at another pole.
  • A. multi-pole circuit breaker having a movable contact member for each pole, an actuator' for each movable contact member, a control device for each movable contact member to connect the companion actuator releasably thereto and to disconnect the actuator from the coinpanion movable contact n einher, means for moving the released contact member to circuit-interrupting position, and universal joint means interconnected betvveen said actuators and operable upon release ci one of said movable contact meinbers from its actuator1 under the control of the control device at one ⁇ pole to effect movement of a contact member at another or said poles to its circuit-interrupting position, said universal joint means including a lost-motion connecton at each actuator so that movement of the released actuator at one pole is not impeded by a non-released actuator at another pole, and said universal joint means also including spring means acting on each movable contact member to provide contact pressure at each pole in the circuit-closed condition of the circuit breaker.
  • a multi-pole circuit breaker having a movable contact mem-'oer for each pole, an actuator for each movable contact member, a control device for each movable contact member to connect the companion actuator releasably thereto and to disconnect the actuator from the companion movable contact member, means for moving the released contact member to circuit-interrupting position, and means interconnected between said actuators and operable upon release of one oi said movable contact members from its actuator under the control of the control device at one pole to eiect movement of a Contact member at another of said poles to its circuit-interrupting position, said interconnected means including a lost-meten connection at each actuator so that movement of the released actuator at one pole is not impeded by a non-released actuator at another pole, said lost motion connection comprising slots defined in the actuators in which parts of the interconnected means have limited movements.
  • a circuit breaker having a movable contact member, an actuator therefor, a control device to connnect the actuator releasably to said movable contact member and to disconnect the actuator therefrom upon overload, and means for moving said movable contact member to circuitinterrupting position upon release thereof by said actuator, that improvement which comprises provision for releasably engaging said actuator and said movable Contact member upon said release of the latter upon overload for releasably retaining said ⁇ actuator in stationary position relative to the movable contact member to prevent free or uncontrolled movement of the actuator when the control device releases the latter.
  • a multi-pole circuit breaker having a movable contact member for each pole, an actuator for each movable contact member, a control device for each movable contact member to connect the companion actuator release-bly thereto and to disconnect the actuator from the companion movable contact member, means for moving the released contact member to circuit-interrupting position, and means interconnected between said actuators and operable upon release ci one of said movable contact members from its actuators under the control of the control device at one pole to ei'ect movement of a Contact member at another of said poles to its circuit-interrupting position, said interconnected means including a lost-motion connection at each actuator so that movement of the released actuator at one pole is not impeded by a non-released ⁇ actuator at another pole, and means for releasably engaging each actuator and its companion movable contact member upon release of the latter to circuit-interrupting position thereof for releasably retaining said actuator in stationary position relative to the movable contact member to prevent free or uncontrolled movement

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NLAANVRAGE7306077,A NL173976B (nl) 1950-08-24 Werkwijze ter bereiding van een smeeroliesamenstelling.
US181224A US2662949A (en) 1950-08-24 1950-08-24 Multipole circuit breaker

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2806103A (en) * 1954-01-21 1957-09-10 Westinghouse Electric Corp Circuit breaker
US2811604A (en) * 1953-12-11 1957-10-29 Fed Electric Prod Co Automatic circuit breakers
US2824191A (en) * 1953-02-05 1958-02-18 Fed Electric Prod Co Circuit breakers
US2923795A (en) * 1957-07-03 1960-02-02 Fed Pacific Electric Co Multi-pole circuit breakers
DE1091204B (de) * 1957-07-03 1960-10-20 Fed Pacific Electric Co Mehrpoliger UEberstromselbstschalter
US2968709A (en) * 1956-03-05 1961-01-17 Mechanical Products Inc Electric switch incorporating circuit breaker
US3089923A (en) * 1959-06-15 1963-05-14 Endevco Corp Sectional digital switch
US3165609A (en) * 1955-08-04 1965-01-12 Fed Pacific Electric Co Temperature compensated circuit breakers
US3178535A (en) * 1957-04-12 1965-04-13 Westinghouse Electric Corp Automatic circuit breaker with improved bimetallic and electromagnetic trip device
US3179767A (en) * 1956-06-21 1965-04-20 Wadsworth Electric Mfg Co Circuit breaker with improved electromagnetic tripping device
US3566049A (en) * 1959-06-15 1971-02-23 Becton Dickinson Co Sectional digital selector switch construction
US5060853A (en) * 1990-07-19 1991-10-29 Gulf States Paper Corporation Tamper evident consumer product package, windowed flat blank used therein, and method and apparatus for making the blank
US11508540B2 (en) * 2018-04-23 2022-11-22 Abb S.P.A. Circuit breaker

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2209319A (en) * 1938-11-28 1940-07-30 Colt S Mfg Co Automatic circuit breaker
US2233336A (en) * 1939-06-05 1941-02-25 Arrow Hart & Hegeman Electric Electric switch construction
US2459427A (en) * 1945-05-24 1949-01-18 Fed Electric Prod Co Circuit breaker
US2465039A (en) * 1945-05-12 1949-03-22 Superior Switchboard And Devic Sectional switch block base
US2471837A (en) * 1944-10-09 1949-05-31 Bulldog Electric Prod Co Circuit breaker
US2503409A (en) * 1944-10-09 1950-04-11 Bulldog Electric Prod Co Multipole switch

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2209319A (en) * 1938-11-28 1940-07-30 Colt S Mfg Co Automatic circuit breaker
US2233336A (en) * 1939-06-05 1941-02-25 Arrow Hart & Hegeman Electric Electric switch construction
US2471837A (en) * 1944-10-09 1949-05-31 Bulldog Electric Prod Co Circuit breaker
US2503409A (en) * 1944-10-09 1950-04-11 Bulldog Electric Prod Co Multipole switch
US2465039A (en) * 1945-05-12 1949-03-22 Superior Switchboard And Devic Sectional switch block base
US2459427A (en) * 1945-05-24 1949-01-18 Fed Electric Prod Co Circuit breaker

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2824191A (en) * 1953-02-05 1958-02-18 Fed Electric Prod Co Circuit breakers
US2811604A (en) * 1953-12-11 1957-10-29 Fed Electric Prod Co Automatic circuit breakers
US2806103A (en) * 1954-01-21 1957-09-10 Westinghouse Electric Corp Circuit breaker
US3165609A (en) * 1955-08-04 1965-01-12 Fed Pacific Electric Co Temperature compensated circuit breakers
US2968709A (en) * 1956-03-05 1961-01-17 Mechanical Products Inc Electric switch incorporating circuit breaker
US3179767A (en) * 1956-06-21 1965-04-20 Wadsworth Electric Mfg Co Circuit breaker with improved electromagnetic tripping device
US3178535A (en) * 1957-04-12 1965-04-13 Westinghouse Electric Corp Automatic circuit breaker with improved bimetallic and electromagnetic trip device
US2923795A (en) * 1957-07-03 1960-02-02 Fed Pacific Electric Co Multi-pole circuit breakers
DE1091204B (de) * 1957-07-03 1960-10-20 Fed Pacific Electric Co Mehrpoliger UEberstromselbstschalter
US3089923A (en) * 1959-06-15 1963-05-14 Endevco Corp Sectional digital switch
US3566049A (en) * 1959-06-15 1971-02-23 Becton Dickinson Co Sectional digital selector switch construction
US5060853A (en) * 1990-07-19 1991-10-29 Gulf States Paper Corporation Tamper evident consumer product package, windowed flat blank used therein, and method and apparatus for making the blank
US11508540B2 (en) * 2018-04-23 2022-11-22 Abb S.P.A. Circuit breaker

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Publication number Publication date
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NL95538C (fr)

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