US2647186A - Circuit breaker - Google Patents

Circuit breaker Download PDF

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Publication number
US2647186A
US2647186A US127433A US12743349A US2647186A US 2647186 A US2647186 A US 2647186A US 127433 A US127433 A US 127433A US 12743349 A US12743349 A US 12743349A US 2647186 A US2647186 A US 2647186A
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United States
Prior art keywords
movable contact
contact member
casing
circuit breaker
chamber
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Expired - Lifetime
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US127433A
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English (en)
Inventor
Thomas M Cole
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
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Filing date
Publication date
Application filed by Federal Electric Products Co filed Critical Federal Electric Products Co
Priority to US127433A priority Critical patent/US2647186A/en
Priority to GB8868/53A priority patent/GB737604A/en
Priority to DEF11624A priority patent/DE1023129B/de
Priority to FR1077726D priority patent/FR1077726A/fr
Priority to CH314465D priority patent/CH314465A/de
Priority to BE519698D priority patent/BE519698A/xx
Application granted granted Critical
Publication of US2647186A publication Critical patent/US2647186A/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
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/40—Combined electrothermal and electromagnetic mechanisms

Definitions

  • This invention relates to automatic circuit breakers and more particularly, but without restriction, to circuit breakers of the general type disclosed in United States Patents Nos. 2,174,669 dated October 3, 1939, 2,209,319, 2,209,352 and 2,209,353 each dated July 3D, 1940 ⁇ and Re. 23,188 dated January 10, 1950.
  • One object of the present invention is the provision of a circuit breaker of the type referred to with improved means for operatively connecting the handle to the movable contact member.
  • Another object is to provide a construction which enables the elimination of insulation between the movable contact member and the lever which is connected thereto for moving said contact member.
  • Another object is the provision of a circuit breaker having an arcing chamber of improved construction.
  • a further object is the provision of an improved terminal arrangement and construction.
  • Fig. 1 is a side view of a circuit breaker embodying the present invention
  • Figs. 2 and 3 are end views as seen from lines 2-2 and 2 3, respectively, of Fig. 1;
  • Fig. 4 is a side view of the circuit breaker, one part of the casing being removed, the circuit breaker mechanism being open;
  • Fig. 5 is a view similar to Fig. 4 showing the circuit breaker mechanism closed
  • Fig. 6 is a sectional View on the line 6-6 of Fig. 5;
  • Fig. '7 is a sectional view on the line l-l of Fig. 5;
  • Fig. 8 is a fragmentary sectional view on the line 8 8 of Fig. 5;
  • Fig. 9 is a perspective view of the actuating member of the circuit breaker, a portion thereof being cut away for the purpose of illustration.
  • the circuit breaker of the present invention comprises a two part insulation housing or casing I0 formed by body part i2 and the cover or closure part i4, each of said parts being formed of insulation material preferably by a molding operation, and being secured in housing-defining relation in any suitable way, for example by bolts I6.
  • 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 me and Paul M. Christensen. as joint inventors, and assigned to the assignee of my present application. 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 with plug-in terminals.
  • the housing is provided, above a re-entrant portion 20, with a chamber 22.
  • a plug-in terminal prong or stab contact 24 is mounted vertically in said chamber, said stab contact being adapted for making contact with said terminal block unit and being provided with the laterally extending portions or arms 28 which are removably positioned in cooperating recesses 2l formed in the walls of said chamber, as illustrated and described in said application. It will be understood that any other suitable type of stab contact may be used in place of the stab Contact 214 illustrated in the drawings herein, for example, and not by way of limitation, the other form of stab contact illustrated and described in the above identied copending application.
  • the casing is provided, above the open recess i8 therein, with an arcing chamber 28 in which the stationary contact 30 and the movable contact 32 are disposed for relative movement.
  • said arcing chamber is bounded by the similarly thickened portions 34, 35 and 38 of wall 40 of the body part, and by the portion 42 of said wall, which extends between the portions 38 and 38, and which is thickened to a lesser extent than said other portions.
  • portion 38 is provided with a shoulder 44 where it extends above portion 42 and that portion 35 is provided with an angular step 4t where it extends above portion ⁇ ft2.
  • the cover part i4 is provided on its inner surface with a thickened portion 48 having a form complementary to portion 42 of wall 40.
  • the ends 50 and 52 of said portion i8 abut the shoulder 44 and the step 46, respectively, as illustrated in Fig. 8, and said portion together with portion 42, the confronting surfaces of which are spaced as at 55, form a bounding wall for the arcing chamber in opposition to the wall thereof formed by the thickened portion 34. Therefore, it will be noted that with the body and cover parts secured together, the casing is provided with an arcing chamber which is closed on all sides thereof except at its opening externally of the casing whereby arcs which may be formed upon the disengagement of contacts 30 and 32 3 are to a very considerable extent prevented from entering that portion of the casing in which the circuit breaker mechanism is contained.
  • a chamber 54 for containing the circuit breaker mechanism is formed by the opposing raised edge portions 56 and 58 of wall 40, by the raised portion 60 of said wall, which also bounds chamber 22, by portions 38, 42 and 48 opposing said portion 60, and by wall 40 and cover
  • the edge portion 56 is provided with an opening 62 therein through which a handle 64 projects for manual operation of the circuit breaker mechanism.
  • the handle is formed of insulation material and is provided with the laterally extending circular pivot portions 65, 65, which are positioned in the bearing recesses 61, 61, respectively, formed in each of the casing parts.
  • said mechanism includes a manually operable member, here shown as the above-mentioned pivoted handle 64.
  • a uni-planar movable contact member 66 formed in one piece, is provided with a portion 58 having a high resistance to the ilow of current therethrough, and a portion 'I0 having a low resistance to current now therethrough.
  • portion 66 is formed of a high resistance metal, such as, for example and without limitation, Nichrome or other suitable metal
  • portion 'I0 is formed of a low resistance metal, such as, for example, and without limitation, bronze, or other suitable metal, and said two portions are secured to each other in edge to edge relation in any suitable way, for example by welding or brazing.
  • Contact member 66 may be formed of powdered metal by a molding operation, with parts 58 and 'l0 of metal powder of high and low resistance, respectively. Said movable contact member is mounted in the chamber 54 for pivotal movement by pivot pin '
  • the low resistance portion is provided with the contact 32 which is engageable with and disengageable from the companion stationary contact carried by the terminal member '
  • the latter are not limited to a movable contact member 65 formed of different metals but apply as well to a circuit breaker in which the movable Contact member is formed of one metal, as in the above mentioned patents, for example.
  • the aforementioned complementary casing portions 42 and 48 form a guideway for the movable contact member, the space between the confronting surfaces thereof defining a guide slot through which an end portion 18 of the movable contact member projects with slight clearance, as illustrated in Figs. ".1 and 8. It will be noted from Fig. 4 that the end portion 18 of the movable contact member abuts step 45 in the disengaged condition of the companion contacts, said step serving to limit the movement of the movable contact member in its circuitopen position.
  • the movable contact member is provided with an integral depending portion 80 which extends through a slot 82 at one end of a thermal-current responsive member 84 which, as here shown, consists of a thermostatic bi-metallic flexible strip which is welded or otherwise secured at said end thereof to a side edge of movable contact member 56.
  • the free end of bi-metallic strip 84 is arranged to releasably engage the latch element 86 at one end of an actuating member or lever 88 pivotally mounted on the end of movable contact member 66 opposite the end which carries the contact 32.
  • the lever 86 is formed in one piece of sheet metal and comprises the laterally spaced opposing walls 90, 90 open between the marginal edges 82, 92 thereof, and partially closed between the opposite marginal edges 94, 04 thereof, by the integral wall 96 which is provided with the aforementioned latch element 86, depending below said opposing walls, and with the longitudinal reinforcing bead 98 offset laterally outwardly thereof.
  • the walls 90, 90 are provided with the confronting punched-in, cylindrical projections
  • 03 is provided in bearing aperture
  • 68 extends with slight clearance through the aligned apertures
  • a coil compression spring H0 is operatively interposed between the movable contact member 66 and handle 64 for biasing the movable contact member to its open position.
  • One end of said spring engages a lug H2 carried by handle 64 and the other end of said spring engages a lug
  • 08 is similar to and operates substantially in the same way as corresponding mechanism in the above identied United States Patent No. 2,459,427.
  • lever 38 obviates the need for providing the movable contact member with the laterally offset parts provided in the movable contact member of said Patent No. 2,459,427, and simplies the pivotal connection of said lever to said movable contact member and the insulation between said two members when insulation is required.
  • the surface of element 86 which engages the free end of strip 84 is free of burrs and is smooth so as not to impede the release of strip 84 when the latter is deflected upon overload.
  • the movable contact member 66 is provided with a generally circular, peripherally interrupted, tapered aperture
  • Said aperture is formed in the marginal edge of said movable contact member at the juncture of the narrowed portion
  • 8 is forced into aperture
  • member 84 operates to latch the manually operable actuating mechanism 68 to the movable contact member 66 and to unlatch the actuating mechanism from the movable contact member, the unlatching taking place upon deflection or" member 84 causing the disengagement of end
  • spring H8 is eirective to move contact member 66 to its open position, i. e., from the position illustrated in Fig. 5 to the position illustrated in Fig. 4.
  • the step 46 constitutes a stop for the member 66 to limit the opening movement of the latter.
  • the thermal element 84 is connected in series with movable Contact member 66 and the circuit which is to be controlled by the circuit breaker.
  • 26 is connected to said thermal element, preferably adjacent to the free end
  • the movable contact member need not be formed of portions having high and low resistance characteristics, but that the actuating member 8e may be formed of a high resistance material, such as Nichrome, or other suitable material, to prevent the flow of current therethrough and into the movable contact member.
  • Load terminal 16 which carries the stationary contact 38, is positioned in an open recessed portion
  • Said terminal comprises an integral conducting strip
  • 48 of said strip extends inwardly beyond wall
  • 34 is of reduced width and passes through an opening in wall
  • 46 is provided with the laterally extending projections
  • 48 abuts a stop
  • the thermal current-responsive member 84 is preferably operable not only in response to the heating eiect of the current passing therethrough, but is also operable under the control of electro-magnetic means for effecting disengagement of the companion relatively movable contacts 38 and 32, and the arrangement is preferably such that, as here shown, the electromagnetic means is energized by the current which passes through the said thermal current-responsive member.
  • 66 is fixedly secured, preferably by welding, or in other suitable manner, on member 85
  • 68 straddles member 84 by which it is carried.
  • 68 is formed in one piece of soft sheet steel or other suitable sheet metal and is provided with an end wall, opposed side Walls, and with cut-turned end portions
  • 62 is provided with a slotted portion
  • the armature is secured to the xed end of member 84, preferably by welding, and side portions
  • the armature is provided with the out-turned portions
  • 62 operate substantially in the same way as corresponding mechanism in said United States Patent No. 2,459,427.
  • an automatic circuit breaker having a stationary contact, a movable contact engageable and disengageable therewith, actuating means for operatively effecting the engagement thereof and a thermally-responsive lai-metallic strip for eiecting the disengagement thereof; a uni-planar movable contact member on which said movable contact and said strip are bodily carried, said actuating means being pivotally carried thereby and being in normal engagement with said strip to prevent relative pivotal movement.
  • an automatic circuit breaker having a stationary contact, a movable contact engageable and disengageable therewith, actuating means for operatively effecting the engagement thereof and a thermally-responsive bi-metallic strip for effecting the disengagement thereof; the combination with said actuating means of a uniplanar movable contact member on which said movable contact and said strip are bodily carried, said actuating means comprising a member straddling said movable contact member, and pivotally carried thereby, said straddling member being in normal engagement with said strip to prevent relative pivotal movement.
  • an automatic circuit breaker having a stationary contact, a movable contact engageable and disengageable therewith, actuating means for operatively eiecting the engagement thereof and a thermally-responsive bi-metallic strip for eiecting the disengagement thereof; the combination with saidactuating means of a movable Contact member on which said movable Contact and said strip are bodily carried, said actauting means being pivotally carried thereby and being in normal engagement with said strip to prevent relative pivotal movement, said actuating means comprising a lever member in direct electrical contact with both said strip and said movable contact member, one of said members being of such character as to cause substantially all of the current in the circuit to pass through said strip.
  • said actuating means comprising a lever member in direct contact with both said strip and said movable contact member, and means integral with one of said members for directing substantially all of the current in the circuit through said strip, said last mentioned means comprising a portion of said movable contact member having a low resistance to current flow and a portion thereof having a high resistance to current ow, said low resistance portion being in the path of current flow between said strip and said movable contact and said high resistance portion being in the path of current flow between said lever member and said movable contact.
  • an automatic circuit breaker having a stationary contact, a movable contact engageable and disengageable therewith, actuating means for operatively effecting the engagement thereof and a, thermally-responsive lai-metallic strip for keifecting the disengagement thereof; the combination with said actuating means of a movable contact member on. which said.
  • said actuating means being pivotally carried thereby and being in normal engagement with said strip to prevent relative pivotal movement, said actuating means comprising a member straddling said movable contact member and in direct contact with both said strip and said movable contact member, said straddling member being formed of a material having a high resistance to current ow whereby substantially none of the current in the circuit will oW therethrough.
  • an automatic circuit breaker having a stationary contact, a movable contact engageable and disengageable therewith, actuating means for operatively effecting the engagement thereof and a thermally-responsive bi-metallic strip for eiecting the disengagement thereof; the combination with said actuating means of a movable contact member on which said movable contact and said strip are bodily carried, said actuating means being pivotally carried thereby and being in normal engagement with said strip to prevent relative pivotal movement, said actuating means comprising a lever member in direct contact with both said strip and said movable Contact member, said lever member being formed of a material having a high resistance to current now whereby substantially none of the current in the circuit will now therethrough.
  • a stationary contact a movable contact member provided with a contact engageable with and disengageable from said stationary contact, manually operable actuating means, and a current-responsive member for eiecting disengagement of said contacts in response to predetermined current in the circuit, said current-responsive member being movable relatively to said movable contact member for latching the latter to and unlatching it from said actuating means, said actuating means being a lever provided with portions straddling said movable contact member and with portions in pivotal engagement therewith and having a part releasably engageable with said current-responsive member.
  • a stationary contact a movable contact member provided with a contact engageable with and disengageable from said stationary contact, manually operable actuating means, and a current-responsive member for eiecting disengagement of said contacts in response to predetermined current in the circuit
  • said current-responsive member being movable relatively to said movable contact member for latching the latter to and unlatching it from said actuating means
  • said actuating means being a lever provided with portions straddling said movable contact member and with portions in pivotal engagement therewith, said lever having a latch element integral with said straddling portions in position therebetween and in latching engagement with said current-responsive member.
  • an automatic circuit breaker having a stationary contact, a movable contact member provided with a contact engageable with and disengageable from said stationary contact, manually operable actuating means and a thermally-responsive bi-metallic strip for eieoting disengagement of said contacts in response to predetermined current in the circuit, said strip beingv carried by and bodily movable with said movable contact member and also movable relatively thereto for latching the latter to and unlatching it from, said actuating means; a depending por- Said strip,
  • an automatic circuit breaker having a stationary Contact, a movable contact member provided with a contact engageable with and disengageable from said stationary contact, manually operable actuating means, and a thermallyresponsive bi-metallic strip for effecting disengagement oi said contacts in response to predetermined current in the circuit, said strip being carried by and bodily movable with said movable contact member and also movable relatively thereto for latching the latter to and unlatching it from said actuating means; a depending portion carried by said movable contact member and extending through said strip, an armature having a surface portion in abutment with a surface of said strip and provided with confronting portions in engagement with the opposite surface of said strip, said depending portion extending through said armature and being secured to an opposite surface portion thereof, and a companion magnetic member carried by said strip and movable in relation to said armature in response to predetermined current in the circuit whereby to move said strip to unlatch said movable contact member from said actuating means independently of the
  • an automatic circuit breaker having a stationary contacty a movable contact member provided with a contact engageable with and disengageable from said stationary contact, manually operable actuating means and a thermallyresponsive lei-metallic element for effecting disengagement of said contacts in response to predetermined current in the circuit, said element being carried by and bodily movable with said movable contact member and also movable relatively thereto for latching said element to and unlatching it from said actuating means; means for calibrating the movement ofk said element relative to said movable contact member comprising a marginal edge portion of said movable contact member in which is delined a peripherally interrupted aperture, and a tapered. member engaged in said aperture for displacing said marginal edge portion of said movable contact member so as to change the relationship of said bi-metallic element with respect to the main body of said movable contact member.
  • an automatic circuit breaker having a stationary contact, a movable contact member provided with a contact engageable with and disengageable from said stationary contact, manually operable actuating means and a thermallyresponsive bi-metallic element for effecting disengagement of said contacts in response to predetermined current in the circuit, said element being carried by and bodily movablewith said movable contact r-mfelilber also movable relatively thereto for latching said element to and unlatching it from said actuating means; means for calibrating the movement of said element relative to said movable contact member comprising a marginal edge portion of said movable contact member in which is defined a peripherally interrupted aperture, and a tapered member engaged in said aperture for displacing said marginal edge portion of said movable contact member so as to change the relationship of said b-metallic element with respect to the main body of said movable contact member, said marginal edge portion being at the -juncture of a narrower portion of said movable contact member and the main body thereof, said actuating means
  • a casing provided with an arcing chamber and a chamber in which the circuit breaker mechanism is disposed, said chambers being separated by a wall formed by complementary portions provided on confronting surfaces of said casing, one of said portions having raised end parts and the other of said portions being removably engageable between said end partsy in abutment therewith, the
  • a casing provided with an arcing chamber and a chamber in which the circuit breaker mechanism is disposed, said chambers being separated by a wall formed by complementary portions provided on confronting surfaces of said casing, one of said portions having raised end parts and the other of said portions being removably engageable between said end parts, in abutment therewith, the confronting surfaces of said portions defining a guideway, a stationary contact disposed in said arcing chamber, and a movable contact member mounted in the other chamber and having a portion disposed in said guideway and extending into said arcing chamber, said latter portion being provided with a movable contact engageable with and disengageable from said stationary contact, said wall encompassing said latter portion for conning arcing within said arcing chamber, said end parts being shoulders formed in opposing walls of said arcing chamber, the ends of said other casing portion being retained against displacement by said shoulders.
  • a casing having an open recessed portion and an arcing chamber adjacent thereto, said recessed portion and said arcing chamber being separated by an apertured portion of said casing forming a wall of said chamber, and a terminal member disposed in said recessed portion and mounted on said wall, said member having a contact carrying part extending through said aperture and abutting the surface of said wall opposite the surface on which said member is mounted.
  • a casing having an open recessed portion and an arcing chamber adjacent thereto, said recessed portion and said arcing chamber being separated by an apertured portion of said casing forming a wall of said chamber, and a terminal member disposed in said recessed portion and mounted on said wall, said member having a contact carrying part extending through said aperture and abutting the surface of said wall opposite the surface on which said member is mounted, said wall having a step formed in said last mentioned surface thereof and a shoulder at said rst mentioned surface thereof, said contact carrying part abutting said shoulder said terminal member having a part engage said step.
  • a casing having an open recessed portion and an arcing chamber adjacent thereto, said recessed portion and said arcing chamber being separated by an apertured portion of said casing forming a wall of said chamber, and a terminal member disposed in said recessed portion and mounted on said wall, said member having a contact carrying part extending through said aperture and abutting the surface of said wall opposite the surface on which said member is mounted, said Wall having a step formed in said last mentioned surface thereof and a shoulder at said first mentioned surface thereof, said contact carrying part abutting said shoulder and said terminal member having a part engaged in said step, said terminal member comprising a continuous strip, said latter part being at one end thereof and said contact carrying part being at the other end thereof.
  • an nsulation casing formed of companion complementary parts mutually secured in housing-defining relation, and a sta-b terminal member contained in said casing and having a portion extending therefrom for effecting contact between said circuit breaker and a companion contact terminal, said casing parts and said stab terminal member being provided with inter-engaging portions for releasably retaining said stab terminal member in operative disposition in said casing.
  • an insulation casing formed of companion complementary parts mutually secured in housing-defining relation, and a stab terminal member contained in said casing and having a portion extending therefrom for effecting contact between said circuit breaker and a companion contact terminal, said casing parts and said stab terminal member being provided with cooperating elements for releasably retaining said stab terminal member in operative disposition in said casing, said cooperating elements comprising laterally extending portions of said stab terminal member and recessed portions in the confronting surfaces of said complementary casing parts, said laterally extending portions being removably engageable in said recessed portions whereby said stab terminal member is supported in said casing parts in axial disposition thereof.
  • an insulation casing having portions defining a chamber in which the circuit breaker mechanism is disposed and a chamber having an opening extending through the surface of said casing, one of said portions being common to said chambers and having an aperture therein, 4a stab terminal member mounted in said latter chamber and having a portion extending through said opening in the casing surface for effecting contact with a companion contact terminal, @11d C01?- 12 ducting means extending through said aperture, one end of said conducting means being connected t0 said stab terminal member, the other end thereof being connected to said circuit breaker mechanism.
  • a casing provided with an arcing chamber and a chamber in which the circuit breaker mechanism is disposed, said chambers being separated by a wall formed by complementary portions provided on confronting surfaces of said casing, one of said portions having raised end parts and the other of said portions being removably engageable between said end parts, in abutment therewith, the confronting surfaces of said portions denning a guideway, a stationary contact disposed in said arcing chamber, a uni-planar movable contact member mounted in the other chamber and having a portion disposed in said guideway and extending into said arcing chamber, said latter portion being provided with a movable contact engageable with and disengageable from said stationary contact, said wall encompassing said latter portion for confining arcing within said arcing chamber, actuating means for operatively effecting the engagement of said contacts, and a thermally responsive bi-metallic strip for effecting the disengagement thereof, said strip being bodily carried by said movable contact member, said actuating
  • a casing having an open recessed portion and an arcing chamber adjacent thereto, said recessed portion and said arcing chamber being separated by an apertured portion of said casing forming a Wall of said chamber, a terminal member disposed in said recessed portion and mounted on said wall, said member having a contact carrying part extending through said aperture and abutting the surface of said wall opposite the surface on which said member is mounted, a movable contact engageable and disengageable with said terminal contact, actuating means for operatively effecting the engagement thereof, a thermally-responsive bi-metallic strip for effecting the disengagement thereof, and a uni-planar movable contact member on which said movable Contact and said strip are bodily carried, said actuating means being pivotally carried thereby and being in normal engagement with said strip to prevent relative pivotal movement.
  • an insulation casing having portions defining a chamber in which the circuit breaker mechanism is disposed and a chamber having an opening extending through the surface of said casing, one of said portions being common to said chambers and having an aperture therein, a stab terminal member mounted in said latter chamber and having a portion extending through said opening in the casing surface for effecting contact with a companion contact terminal, a stationary Contact, a movable contact engageable and disengageable therewith, actuating means for operatively effecting the engagement thereof, a thermally-responsive bi-metallic strip for effecting the disengagement thereof, a uniplanar movable contact member on which said movable contact and said strip are bodily carried, said actuating means being pivotally carried thereby and being in normal engagement with said strip t0 prevent relative pivotal move- 13 ment, and conducting means extending through said aperture, one end of said conducting means being connected to said stab terminal member, the other end thereof being connected to said strip.
  • a casing provided with an arcing chamber and a chamber in which the circuit breaker mechanism is disposed, said chambers being separated by a wall formed by complementary portions provided on confronting surfaces of said casing, one of said portions having raised end parts and the other of said portions being removably engageable between said end parts, in abutment therewith, the confronting surfaces of said portions dening a guideway, a stationary contact disposed in said arcing chamber, a uni-planar movable contact member mounted in the other chamber and having a portion disposed in said guideway and extending into said arcing chamber, said latter portion being provided with a movable contact engageable with and disengageable from said stationary contact, said wall encompassing said latter portion for confining arcing within Said arcing chamber, actuating means for operatively effecting the engagement of said contacts, a thermally responsive bi-metallic strip for effecting the disengagement thereof, said strip being bodily carried by said movable contact member, said actuating
  • a casing provided with an arcing chamber and a chamber in Which'the circuit breaker mechanism is disposed, said chamber being separated by a wall formed by complementary portions provided on confronting surfaces of said casing, one of said portions having raised end parts and the other of said portions being removably engageable between said end parts, in abutment therewith, the confronting surfaces of said portions defining a guideway, a stationary contact disposed in said arcing chamber, a uni-planar movable contact member mounted in the other chamber and having a portion disposed in.
  • said guideway and extending into said arcing chamber said latter portion being provided with a movable contact engageable with and disengageable from said stationary contact, said wall encompassing said latter portion for confining arcing within said arcing chamber, actuating means for operatively effecting the Vengagement of said contacts, a thermally responsive 1,ci-metallic strip for eifecting the disengagement thereof, said strip being bodily carried by said movable contact member, said actuating means being pivotally carried thereby and being in normal engagement with said strip to prevent relative pivotal movement, said casing having an additional chamber provided with an opening extending through the surface of said casing, said casing having a portion common to said additional chamber and the chamber containing the circuit breaker mechanism, said common portion having an aperture therein, a stab terminal member mounted in said additional chamber and having a portion extending through said opening in the casing surface for eifecting contact with a companion contact terminal, and conducting means extending through said aperture, one end of said conducting means being connected to said stab terminal member,
  • an insulation casing having portions defining a chamber in which the circuit breaker mechanism is disposed and a chamber having an opening extending through thesurface of said casing, one of said portions being common to said chambers and having an aperture therein, a stab terminal member mounted in said latter chamber and having a portion extending through said opening in the casing surface for effecting contact with a companion contact terminal, a stationary contact, a movable contact engageable and disengageable therewith, actuating means for operatively effecting the engagement thereof, a thermany-responsive bi-metallic strip for effecting the disengagement thereof, a uni-planar movable contact member on which said movable contact and said strip are bodily carried, said actuating means being pivotallyk carried thereby and being in normal engagement with said strip to prevent relative pivotal movement, conducting means extending through said aperture, one end of said conducting means being connected to said stab terminal member, the other end thereof being connected to said strip, said casing having an open recessed portion and an
  • a casing provided with an arcing chamber and a chamber in which the circuit breaker mechanism is disposed, said chambers being separated by a wall formed by complementary portions provided on confronting surfaces of said casing, one of said portions having raised end parts and the other of said portions being removably engageable between said end parts, in abutment therewith, the confronting surfaces of said portions dening a guideway, a stationary contact disposed in said arcing chamber, a uni-planar movable contact member mounted in the other chamber and having a portion disposed in said guideway and extending into said arcing chamber, said latter portion being provided with a movable contact engageable with and disengageable from said stationary contact, said wall encompassing said latter portion for confining arcing within said arcing chamber, actuating means for operatively effecting the engagement of said contacts, a thermally responsive lei-metallic strip for effecting the disengagement thereof, said strip being bodily carried by said'movable contact member, said actuating means
  • a casing provided With an arcing chamber and a chamber in which the circuit breaker mechanism is disposed, said chambers being separated by a wall formed by complementary portions provided on confronting surfaces of said casing, one of said portions having raised end parts and the other of said portions being removably engageable between said end parts, in abutment therewith, the confronting surfaces of said portions defining a guideway, a stationary contact disposed in said arcing chamber, a movable Contact member mounted in the other chamber and having a portion disposed in said guidevvay and extending into said arcing chamber, said latter portion being provided with a movable contact engageable with and disengageable from said stationary contact, said wall encompassing said latter portion for confining arcing Within said arcing chamber, said casing having an open recessed portion adjacent said arcing chamber, said recessed portion and said arcing chamber being separated by an apertured portion of said casing forming another wall of said arcing chamber, and a terminal member disposed in
  • a casing provided with an arcing chamber and a chamber in which the circuit breaker mechanism is disposed, said chambers bein separated by a wall formed by complementary portions provided on confronting surfaces of said casing, one of said portions having raised end parts and the other of said portions being removably engageable between said end parts, in abutment therewith, the confronting surfaces of said portions defining a guideway, a stationary Contact disposed in said arcing chamber, a movable contact member mounted in the other chamber and having a portion disposed in said guideway and extending into Said arcing chamber, said latter portion being provided with a movable contact engageable with and disengageable from said stationary contact, said wall encompassing said latter portion for conning arcing Within said arcing chamber, said casing having an additional chamber provided with an opening extending through the surface of said casing, said casing having a portion common to said additional chamber and the chamber containing the circuit breaker mechanism, said common portion having an aperture therein, a stab
  • an insulation casing having portions deiining a chamber in which the circuit breaker mechanism is disposed and a chamber having an opening extending through the surface of said casing, one of said portions being common to said chambers and having an aperture therein, a stab terminal member mounted in said latter chamber and having a portion extending through said opening in the casing surface for eiiecting contact with a companion contact terminal, conducting means extending through said aperture, one end of said conducting means being connected to said stab terminal member, the other end thereof being connected to said circuit breaker mechanism, said casing having an open recessed portion and an arcing chamber adjacent thereto, said recessed portion and said arcing chamber being separated by an apertured portion of said casing forming a wall of said arcing chamber, and a terminal member disposed in said recessed portion and mounted on said wall, said latter terminal member having a contact carrying part extending through said aperture and abutting the surface of said Wall opposite the surface on which said latter terminal member is mounted, said circuit breaker
  • a casing provided With an arcing chamber and a chamber in which the circuit breaker mechanism is disposed, said chambers being separated by a wall formed by complementary portions provided on confronting surfaces of said casing, one of said portions having raised end parts and the other of said portions being removably engageable between said end parts, in abutment therewith, the confronting surfaces of said portions defining a guideway, a stationary contact disposed in said arcing chamber, a movable Contact member mounted in the other chamber and having a portion disposed in said guideway and extending into said arcing chamber, said latter portion being provided with a movable contact engageable with and disengageable from said stationary contact, said wall encompassing said latter portion for coniining arcing within said arcing chamber, said casing having an open recessed portion adjacent said arcing chamber, said recessed portion and said arcing chamber being separated by an apertured portion of said casing forming another wall of said arcing chamber, a terminal member disposed in said
  • an automatic circuit ⁇ breaker having a stationary contact, a movable contactv member mounted for pivotal movement and provided with a contact engageable with and disengageable from said stationary contact; manually operable means for actuating said movable contact member comprising a lever pivotallyA mounted on said movable contact member and current responsive means releasably connecting said lever operatively to said movable contact member, said f lever being formed in one piece and having laterally spaced parts disposed at opposite sides of said movable contact member and an intermediate part connecting said spaced parts and having a surface portion providing a latch releasably engaged by said current responsive means to provide said releasable operative connection of said lever to said movable contact member.
  • manually operable means for actuating said movable contact member comprising a lever pivotally mounted on said movable contact member and current responsive means releasably connecting said lever operatively to said movable contact member, said lever having laterally spaced parts disposed at opposite sides of said movable Contact member and an intermediate part connecting said spaced parts and having a surface portion providing a latch releasably engaged by said current responsive means to provide said releasable operative connection of said lever to said movable contact member.
  • manually operable means for actuating said movable contact member comprising a lever pivotally mounted on said movable contact member and current responsive means releasably connecting said lever operatively to said movable contact member, said lever being formed of sheet metal and having a laterally extending surface part disposed transversely of saidy movable contact member, said surface part being adjacent a free end of said lever and providingl a latching surface releasably engaged by said current responsive means to provide said releasable operative connection of said lever to said movable contact member.
  • movable contactv member comprising ay lever pivotally mounted on said movable contact member and current responsive means releasably connecting said lever operatively to said movable contact member, said lever being formed of sheetk metal and having a laterally extending surfacer part disposed transversely of said movable contact member, said surface part being adjacent a free end of said lever and providing a latching surface releasably engaged by said current responsive meansk to provide said releasable operative connection of said lever to said movable contact member, said current. responsive means comprising ak thermostatic strip having av free end abutting said latching surface in said releasable engagement of said current responsive means with said lever.
  • manually op.- erable means for actuating said movable contact member comprising a lever pivotally mounted on said movable contact member and current responsive means releasably connecting said lever operatively to said movable contact member, said lever being formed of sheet metal and having a laterally extending surface part disposed transversely of said movable ⁇ contact member, said surface part being adjacent a free end of said lever and providing a latching surface releasably engaged by said current responsive meansy to provide said releasable operative connection of said lever to said movable contact member, said current responsive means comprising a thermostatic strip carried by said movable contact member andV having a free end abutting said latchingy surfacein said releasable engagement of said current responsive means With said lever.
  • manually operable means for actuating said movable contact member comprising a lever pivotally mounted on said movable contact member and current responsive means releasably connecting said lever operatively to said movable contact member, said lever having laterally spaced parts disposed at opposite sides of said movable contact member and an intermediate part connecting said spaced' parts and having aV surface portion providing a latch releasably engaged by said current responsive means to provide said releasable operative connection of said lever to said movable contact member, said current responsive means comprising a thermostatic strip having a free end abutting said latching surface in said releasable engagement of said current responsive means with said ⁇ lever.
  • an automatic circ-uit breaker having a stationary contact, a movable Contact member mounted for pivotal movement and provided with a contact engageable with and disengageable,A from said stationary contact; manually opera'ble means for actua-ting said movable contact member comprising a lever pivotally mounted on said movable contact member and current responsive means releasably connecting'said lever operatively to said movable contact member, said lever being formed in one piece and having laterally spaced parts disposed at opposite sides ⁇ v of said movable contact member and an intermedi- A ate part connecting saidspacedparts and, havingy a surface portion providing a latch releasably7 engaged by said current responsive means to provide said releasable operative connection of said lever to said movable contact member, said current responsive means comprising a thermostatic strip having a free end abutting said latching surface in said releasable engagement of said current responsive means with said lever.
  • an automatic circuit breaker having a stationary contact, a movable contact member mounted for pivotal movement and provided with a contact engageable with and disengageable from said stationary contact; manually operable means for actuating said movable contact member comprising a lever pivotally mounted on said movable contact member and current responsive means releasably connecting said lever operatively to said movable contact member, said lever being formed in one piece of sheet metal and having laterally spaced parts disposed at opposite sides of said movable contact member and an intermediate part connecting said spaced parts and having a surface portion providing a latch releasably engaged by said current responsive means to provide said releasable operative connection of said lever to said movable contact member.
  • a movable contact member mounted for pivotal movement and provided with a contact engageable with and disengageable from said stationary contact; manually operable means for actuating said movable contact member comprising a lever pivotally mounted on said movable contact member and current responsive means releasably connecting said lever operatively to said movable contact member, said lever being formed of sheet metal and having laterally spaced parts disposed at opposite sides of said movable contact member and an intermediate part connecting said spaced parts and having a surface portion providing a latch releasably engaged by said current responsive means to provide said releasable operative connection of said lever to said movable contact member, said current responsive means comprising a thermostatic strip carried by said movable contact member and having a free end abutting said latching surface in said releasable engagement of said current responsive means with said lever.
  • an automatic circuit breaker having a stationary contact, a movable contact member mounted for pivotal movement and provided with a contact engageable with and disengageable from said stationary contact; manually operable means for actuating said movable contact member comprising a lever pivotally mounted on said movable contact member and current responsive means releasably connecting said lever operatively to said movable contact member, said lever being formed of sheet metal and having spaced sides provided with integral pivot elements engaging said movable contact member for said pivotal connection of said lever to said movable contact member, said lever having an integral part between said sides disposed transversely of said movable contact member, said surface part being adjacent a free end of said lever and providing a latching surface releasably engaged by said current responsive means to provide said releasable operative connection of said lever to said movable contact member.
  • manually operable means for actuating said movable contact member comprising a lever pivotally mounted on said movable contact member and current responsive means releasably connecting said lever operatively to said movable contact member, said lever being formed of sheet metal and having spaced sides provided with integral pivot elements engaging said movable contact member for said pivotal connection of said lever to said movable contact member, said lever having an integral part between said sides disposed transversely of said movable contact member, said surface part being adjacent a free end of said lever and providing a latching surface releasably engaged by said current responsive means to provide said releasable operative connection of said lever to said movable contact member having a free end abutting said latching surface in said releasable engagement of said current responsive means With said lever.
  • an automatic circuit breaker having a movable contact member, an actuating member carried by said movable contact member and a flexible control device for operatively connecting said actuating member releasably to said movable Contact member for operating the latter except when said control device is disconnected from said actuating member upon overload, a depending portion carried by said movable contact member and extending through Said control device, and a substantially rigid armature having a surface portion in abutment with said control device, said depending portion extending through said armature and being secured to an opposite surface portion thereof.
  • an automatic circuit breaker having a movable contact member; an actuating member carried by said movable contact member, and a control device for operatively connecting said actuating member releasably to said movable contact member for operating the latter except when said control device is disconnected from said actuating member upon overload, said control device being xed in relation to said movable contact member, and said actuating member being adjustable in relation to said control device to calibrate the circuit breaker for automatic opening thereof upon overload.
  • an automatic circuit breaker having a movable contact member; an actuating member carried by said movable contact member, and a control device for operatively connecting said actuating member releasably to said movable contact member for operating the latter except when said control device is disconnected from said actuating member upon overload, said control device being fixed in relation to said movable contact member, and said actuating member being adjustable in relation to said control device to calibrate the circuit breaker for automatic opening thereof upon overload, said movable contact member having a bendable part and said actuating member being secured to Said bendable part.
  • an automatic circuit breaker having a movable contact member; an actuating member carried by said movable contact member, and a control device for operatively connecting said actuating member releasably to said movable contact member for operating the latter except
  • said control device being disconnected from said actuating member upon overload, said control device being iixed in relation to said movable contact member, and said actuating member being adjustable in relation to said control device to calibrate the circuit breaker for automatic opening thereof upon overload
  • said movable contact member having a bendable part and said actuating member being secured to said bendable part, said control device being secured to said movable contact member at a point thereof which is spaced from said bendable part.
  • an automatic circuit breaker having a movable contact member; an actuating member carried by said movable contact member, and a control device for operatively ⁇ connecting said actuating member releasably to said movable contact member for operating the latter except
  • said control device being xed in relation to said movable contact member, and said actuating member being adjustable in relation to said control device to calibrate the circuit breaker for automatic opening thereof upon overload
  • said movable contact member having a bendable part and said actuating member being secured to said bendable part, said bendable part having an aperture defined in an edge thereof, and a tapered member pressed into said aperture for bending said part.
  • an automatic circuit breaker having a movable contact member; an actuating member carried by said movable contact member, and a control device for operatively connecting said actuating member releasably to said movable contact member for operating the latter except when said control device is disconnected from said ac- 9 tuating member upon overload, said control device being fixed in relation to said movable contact member, and said actuating member being adjustable in relation to said control device to calibrate the circuit breaker for automatic opening thereof upon overload, said control device being a bimetallic strip having a free end engageable by said actuating member, and the latter having an end portion which is adjusted in relation to said free end of the bimetallic member by said adjustment of the actuating member.
  • an insulation casing formed of companion complementary parts mutually secured in housing-defining relation, and a stab terminal member contained in l said casing and having a portion extending therefrom for effecting contact between said circuit breaker and a companion contact terminal, said casing parts and said stab terminal member being provided with inter-engaging portions for releasl ably retaining said stab terminal member in operative disposition in said casing, said interengaging portions comprising integral parts of said stab terminal member and integral portions of said casing parts adapted to receive said integral stab parts, respectively.
  • an insulation casing formed of companion complementary parts mutually secured in housing-defining relation, and a prong terminal member carried by said casing, said prong member having an end portion extending from said casing and a portion disposed therein, said latter portion being provided with integral parts, and said casing parts having formations engageable with said integral parts for xing said prong in operative disposition therein,
  • an insulation casing formed of companion complementary parts mutually secured in housing-defining relation, and a prong terminal member carried by said casing, said prong member having an end portion extending from said casing and a portion disposed therein, said latter portion being provided with integral parts, and said casing parts having formations engageable with said integral parts for fixing said prong in operative disposition therein, said integral parts extending laterally from said prong member and said casing formations being in confronting disposition for receiving said integral parts, respectively.
  • an insulation casing provided with a longitudinally extending prong terminal member projecting therefrom, and cooperating means provided on said member and on said casing for securely retaining said member in longitudinal disposition thereoi ⁇ in said casing.
  • an insulation casing provided with a longitudinally extending prong terminal member projecting therefrom, and cooperating means provided on said member and on said casing for securely retaining said member in longitudinal disposition thereof in said casing, said means provided on said prong member being portions thereof which extend transversely of said casing.
  • an insulation casing provided With a longitudinally extending prong terminal member projecting therefrom, and cooperating means provided on said member and on said casing for securely retaining said member in longitudinal disposition thereof in said casing, said means provided on said prong member being portions thereof which extend transversely of said casing, and said means provided on said casing being confronting formations dened therein for receiving said transversely extending portions.

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US127433A 1949-11-15 1949-11-15 Circuit breaker Expired - Lifetime US2647186A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US127433A US2647186A (en) 1949-11-15 1949-11-15 Circuit breaker
GB8868/53A GB737604A (en) 1949-11-15 1953-03-31 Automatic electric circuit breakers
DEF11624A DE1023129B (de) 1949-11-15 1953-04-20 Kleinselbstschalter
FR1077726D FR1077726A (fr) 1949-11-15 1953-04-22 Disjoncteur perfectionné
CH314465D CH314465A (de) 1949-11-15 1953-04-23 Uberstromschalter
BE519698D BE519698A (en(2012)) 1949-11-15 1953-05-05

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US127433A US2647186A (en) 1949-11-15 1949-11-15 Circuit breaker

Publications (1)

Publication Number Publication Date
US2647186A true US2647186A (en) 1953-07-28

Family

ID=9860812

Family Applications (1)

Application Number Title Priority Date Filing Date
US127433A Expired - Lifetime US2647186A (en) 1949-11-15 1949-11-15 Circuit breaker

Country Status (6)

Country Link
US (1) US2647186A (en(2012))
BE (1) BE519698A (en(2012))
CH (1) CH314465A (en(2012))
DE (1) DE1023129B (en(2012))
FR (1) FR1077726A (en(2012))
GB (1) GB737604A (en(2012))

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2758174A (en) * 1950-09-14 1956-08-07 Fed Electric Prod Co Circuit breakers
US2786113A (en) * 1953-07-21 1957-03-19 Fed Electric Prod Co Calibration of circuit breaker mechanism within casing
US2789179A (en) * 1951-04-17 1957-04-16 Fed Electric Prod Co Automatic circuit breakers
US2876308A (en) * 1953-08-19 1959-03-03 Fed Electric Prod Co Circuit breakers
DE1056713B (de) * 1955-09-23 1959-05-06 Siemens Ag Selbstschalter mit thermischem Ausloeser

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1662970A (en) * 1924-08-18 1928-03-20 Grosse Carl Safety device for electric lines
US2008068A (en) * 1930-05-15 1935-07-16 Pass & Seymour Inc Electric switch
US2157787A (en) * 1935-02-05 1939-05-09 Automotive Devices Corp Electromagnetic switch device
US2209319A (en) * 1938-11-28 1940-07-30 Colt S Mfg Co Automatic circuit breaker
US2209352A (en) * 1938-04-15 1940-07-30 Colt S Mfg Co Automatic circuit breaker
US2363606A (en) * 1942-03-23 1944-11-28 Square D Co Arc suppressor
US2419072A (en) * 1945-06-08 1947-04-15 Gen Electric Electric switch
US2450268A (en) * 1945-08-30 1948-09-28 Gen Electric Circuit breaker
US2459427A (en) * 1945-05-24 1949-01-18 Fed Electric Prod Co Circuit breaker

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE740528C (de) * 1941-11-07 1943-10-22 Wilhelm Leyhausen Kontakttraeger fuer Kleinselbstschalter

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1662970A (en) * 1924-08-18 1928-03-20 Grosse Carl Safety device for electric lines
US2008068A (en) * 1930-05-15 1935-07-16 Pass & Seymour Inc Electric switch
US2157787A (en) * 1935-02-05 1939-05-09 Automotive Devices Corp Electromagnetic switch device
US2209352A (en) * 1938-04-15 1940-07-30 Colt S Mfg Co Automatic circuit breaker
US2209319A (en) * 1938-11-28 1940-07-30 Colt S Mfg Co Automatic circuit breaker
US2363606A (en) * 1942-03-23 1944-11-28 Square D Co Arc suppressor
US2459427A (en) * 1945-05-24 1949-01-18 Fed Electric Prod Co Circuit breaker
US2419072A (en) * 1945-06-08 1947-04-15 Gen Electric Electric switch
US2450268A (en) * 1945-08-30 1948-09-28 Gen Electric Circuit breaker

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2758174A (en) * 1950-09-14 1956-08-07 Fed Electric Prod Co Circuit breakers
US2789179A (en) * 1951-04-17 1957-04-16 Fed Electric Prod Co Automatic circuit breakers
US2786113A (en) * 1953-07-21 1957-03-19 Fed Electric Prod Co Calibration of circuit breaker mechanism within casing
US2876308A (en) * 1953-08-19 1959-03-03 Fed Electric Prod Co Circuit breakers
DE1056713B (de) * 1955-09-23 1959-05-06 Siemens Ag Selbstschalter mit thermischem Ausloeser

Also Published As

Publication number Publication date
CH314465A (de) 1956-06-15
DE1023129B (de) 1958-01-23
GB737604A (en) 1955-09-28
BE519698A (en(2012)) 1953-05-30
FR1077726A (fr) 1954-11-10

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