US2856487A - Cutout switch - Google Patents

Cutout switch Download PDF

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Publication number
US2856487A
US2856487A US653217A US65321757A US2856487A US 2856487 A US2856487 A US 2856487A US 653217 A US653217 A US 653217A US 65321757 A US65321757 A US 65321757A US 2856487 A US2856487 A US 2856487A
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US
United States
Prior art keywords
disc
push
bimetallic
support
movable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US653217A
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English (en)
Inventor
Mang Robert
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Individual
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Individual
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Publication of US2856487A publication Critical patent/US2856487A/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/04—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrothermal opening
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H15/00—Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch
    • H01H15/02—Details
    • H01H15/06—Movable parts; Contacts mounted thereon
    • H01H15/10—Operating parts
    • H01H15/102—Operating parts comprising cam devices

Definitions

  • This invention relates to circuit-breakers and more particularly to cutout switches and it is the chief object of this invention to provide an improved electrical apparatus designed for acting either as an ordinary switch for making and breaking a contact, or as a cutout for automatically opening the circuit when the current flowing through this circuit exceeds a predetermined value.
  • the apparatus comprises similarly a bimetallic element which opens the circuit automatically in case of overcurrent, but it is so designed that the automatic control means for reclosing this element may also act as manual control means for moving the movable contact carried by said current-responsive ele ment so that the apparatus may operate not only as a cutout but also as a switch.
  • the apparatus according to this invention is characterized essentially in that the bimetallic currentresponsive element which carries a movable contact at its free end is supported in turn by a movable member mounted for tilting movement in the casing of the apparatus and adapted to be actuated by means of a sliding push-member provided with a control knob.
  • This sliding push-member is adapted to cause the movable member and consequently the movable contact carried thereby to tilt in one or the other direction for either separating the movable contact from the fixed contact or moving the former towards the latter, this last-mentioned operation serving the purpose of reclosing the switch as a consequence either of a voluntary switch-opening movement, or of an automatic separation of the contacts due to a snap reversing of the curvature of the current-responsive element in case of overcurrent.
  • the movable member consists of a plate bent substantially to a U shape on the side opposite to the currentresponsive element, the latter being secured on one edge of this U shaped plate the other edge of which carries side trunnions pivoting on the casing of the apparatus.
  • the sliding push-member comprises on its lower face a projection located substantially between the branches of the U-shaped movable member, each end of this projection engaging a corresponding branch of the movable member to tilt same in one or the other direction according to the direction of motion of the push member.
  • Figure l is a perspective exploded view showing the essential component elements of an apparatus according to this invention.
  • Figure 2 is a perspective view showing the currentresponsive element assembled with the movable member.
  • FIGS 3, 4 and 5 are fragmentary sectional views showing an apparatus constructed in accordance with the teachings of this invention, the control members and component elements thereof being shown in diiferent operating positions.
  • the apparatus illustrated in the drawings comprises an insulating base 1 carrying a pair of input and output terminals 2, 3 and a cover 4 adapted to fit over the base to form a case.
  • This apparatus contains a bimetallic control element 5 which may consist of a strip or disc having a suitable preset curvature adapted to be reversed with a snap action when heated by the Joule effect when the current flowing therethrough attains a predetermined value.
  • this bimetallic element consists of a curved, dished metal disc of non-developable configuration which is formed with an annular cut-out portion so as to comprise an external annulus 5a and a central portion 512 connected by a junction zone.
  • the central portion 5b of the disc is secured on a lug 6a of a movable member 6 consisting of a bent, substantially U-shaped plate the branches of which extend in a. direction opposite to the disc 5.
  • this bent plate 6 comprises two side branches 7, 8, the branch 7 being notched in its middle to form a pair of side arms, as shown. These arms are slightly inclined on the side opposite to the branch 8 and their free ends are bent back, as shown.
  • the fixation lug 6a of the bimetallic disc corresponds to the notch formed in the branch 7, so that the disc is secured in the vicinity of one of the corners of this movable member.
  • Adjacent to the other corner of this movable member are a pair of lateral trunnions 9 pivotally mounted in suitable bearing-forming cavities of the base 1, so that the movable member may tilt freely therein.
  • the disc 5 carries a movable contact 10 on its external annulus 50, on the side opposite to the zone where this annulus is connected to the central portion 5b, this zone being adjacent to the trunnions 9, as shown in Fig. 2.
  • a fixed contact 11 is provided under the movable contact 10. This fixed contact is secured substantially centrally of a flexible strip 12 constituting an electrical connection between the terminal 2 and the fixed contact. One end of this strip 12 is clamped between the terminal and the base 1, and the other end has screwed y through it a micrometric'screw 13 engaging the base 1 so that the pressure between the contacts 10, 11 may be adjusted with precision by screwing in or out the screw 13.
  • the apparatus also comprises a push-member 14 adapted to actuate the movable member 6.
  • This pushmember 14 is slidably mounted in a frame 15 secured on the base 1 and carries on its upper face a control button 16 projecting externally from the cover 4 of the apparatus through a suitable slot.
  • the lower face of the sliding push-member comprises a projection 17 lying between the branches 7 and 8 of the movable member 6 when the component elements of the apparatus are in their inoperative position (see Fig. 5).
  • the projection 17 of the push-member is also divided into two corresponding portions disposed on either side of a central portion 18.
  • This central portion comprises on the other hand a cavity adapted to receive a coil spring 19 hearing with one end against the aforesaid frame 15 and with its other end the push-member on the side of the branch 8 of the movable member.
  • the locking action just described is of such nature that it is possible nevertheless toopen the switch by moving the push-member in the opposite direction, that is, to the right when considering Figs. 3 to 5, the arms 7' being easily released from the notches 20 whereafter-the-projection 17 of the push-member engages the opposite branch 8 of the movable member to tilt same and move the contact 10 away from the fixed contact 11 (see Fig. 5-)--.
  • thermostatic discs which resume automatically their initial. position when their temperature has, fallen to a value approximating the ambient value
  • the cutout switch is equipped with a no-n-thermostatic disc. After a short-circuit, as the disc does not resume its initial shape when the ambient temperature is restored therein, a mechanical actlon must be applied to reset the disc. Now this action may be effected by the spring 19 itself.
  • Fig. 4 showing the apparatus after the release thereof due to an overcurrent in the circuit, and before the disc has cooled down to normal temperature.
  • the spring 19 in theopen position of the device exer-ts a pressure through. the medium. of. the. push member 14 against'the branch .8 ofv the. movable member 6 and therefore. against thev centraL portion 5b of the disc.
  • the bimetallic disc reset not by the springbut by a voluntary. manual .or other action produced on the push-member 14 to-strongly-urge the projection:17 there.- of against. the branch 8 of the movable member. 6.
  • thespring 19. may beof relatively moderate forceas the disc curvature is not reversed by the spring;
  • the bimetallic disc or strip of any form equipping the apparatus may be provided with a suitablydesignedstop so mounted as'to constantly keep the disc orstrip under the requisit'epressure and'in the proper shape obtaining when the contacts are normally engaging eachother'during the closingof the apparatus;
  • theaforesaid stop consists of a transverse strip 22 which may be a metal'strip; This strip is secured by its'middle on thfllOWCI face of thecentral portion" 5b of the disc and extends at right angles to the radius passing through the contact 10;
  • this transversestrip will urge the sides of the annulus 5a of the'dis'cupwa-rdsso that the latterwill undergo a-changein' shape-which is as pro nounced as that to which it is subjected when it exerts the normal adjustment pressure-onthe contacts.
  • this flexible connection 24 which may advantageously consist of a copper blade, is adapted to exert a springlike action and causes through its curved shape the movable member to be urged in such a position that the contacts 10, 11 are held away from each other during the very short time required for the push member 14 to move from one position to the other position.
  • a cutout switch comprising an insulating case provided with an input terminal and an output terminal, a bimetallic current-responsive dished element of the curvature snap-reversing type which is connected to one of said terminals, a movable contact on said bimetallic element, at fixed contact provided in said case in front of said movable contact and connected to the other terminal, a tilting support pivoted in the case and supporting the said bimetallic element, a push-member slidably mounted in said case and adapted to actuate said support in one and the other direction, a spring urging said push member against said support on the side opposite to said movable contact of said bimetallic element, releasable locking means provided on said support and said push member respectively, said means being adapted when eoacting together on the one hand to keep said support in its tilted position with said movable contact engaging said fixed contact, and on the other hand to hold said push member against motion on the spring side, whereby said spring is held in its compressed condition.
  • a cutout switch comprising an insulating case provided with an input terminal and an output terminal, a bimetallic current-responsive dished element of the curvature snap-reversing type which is connected to the other terminal, a movable contact on said bimetallic element, a fixed contact in said case which registers with said movable contact and is connected to said other terminal, a tilting, substantially U-shaped support carrying said himetallic element and having its branches bent on the side opposite to said bimetallic element, said bimetallic element being secured on one side of said support, the edge on the side opposite to said support comprising pivot means through which said support is pivoted on said case, a push member slidably mounted in said case to register with said support and on the same side as said bent branches, said push member being adapted to actuate either end of said support, a spring urging said push member in the direction of said first end of said support which is on the side opposite to said movable contact of said bimetallic element, locking means on said other end of said support and said push member respectively,
  • Cutout switch as set forth in claim 2, comprising in addition in said case a partition of insulating material which registers with said movable contact of said bimetallic element on the side opposite to said fixed contact, said insulating partition being adapted to act as a stop for said movable contact when the curvature of said himetallic element is reversed.
  • a cutout switch comprising an insulating case pro vided with an input terminal and an output terminal, a bimetallic current-responsive dished element adapted to have its curvature reversed when the current flowing therethrough exceeds a predetermined value, said bimetallic disc being connected to one of said terminals, a movable contact on the edge of one side of said bimetallic disc, a fixed contact in said case which registers with said movable contact and is connected to the other of said terminals, a U-shaped tilting support carrying said bimetallic disc by the centre of said disc, the branches of said U-shaped support being bent on the side opposite to said bimetallic disc, the edge of said support which is positioned on the side opposite to said movable contact of said bimetallic element carrying the pivot means through which said support is pivoted on said case, a push member slidably mounted in said case which registers with said support and is positioned on the same side as the bent end portions of said support, said push member being adapted to actuate either end of said support, a

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  • Thermally Actuated Switches (AREA)
US653217A 1956-04-28 1957-04-16 Cutout switch Expired - Lifetime US2856487A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1099042X 1956-04-28

Publications (1)

Publication Number Publication Date
US2856487A true US2856487A (en) 1958-10-14

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ID=9619524

Family Applications (1)

Application Number Title Priority Date Filing Date
US653217A Expired - Lifetime US2856487A (en) 1956-04-28 1957-04-16 Cutout switch

Country Status (7)

Country Link
US (1) US2856487A (en, 2012)
BE (1) BE556706A (en, 2012)
CH (1) CH336488A (en, 2012)
DE (1) DE1099042B (en, 2012)
FR (1) FR1150119A (en, 2012)
GB (1) GB807704A (en, 2012)
NL (2) NL101850C (en, 2012)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3135848A (en) * 1960-11-21 1964-06-02 Mechanical Products Inc Convenience outlet and circuit breaker device
US3192346A (en) * 1963-06-03 1965-06-29 Gen Electric Current and temperature snap acting devices
US3246107A (en) * 1963-11-04 1966-04-12 United Carr Inc Non-resetting thermally responsive switch
US3275773A (en) * 1964-04-09 1966-09-27 Grover Products Corp Over-center snap switch
US5742219A (en) * 1994-04-28 1998-04-21 Siemens Electromechanical Components, Inc. Switchable circuit breaker

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3525093A1 (de) * 1985-07-13 1987-01-22 Inter Control Koehler Hermann Temperaturregler
EP0201002B1 (de) * 1985-05-04 1991-08-07 INTER CONTROL Hermann Köhler Elektrik GmbH u. Co. KG Thermisch gesteuertes elektrisches Schaltelement, insbesondere Temperaturregler oder Temperaturbegrenzer
US4635021A (en) * 1985-06-14 1987-01-06 Hsieh Teng Jui Automatic overload tripper

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2130368A (en) * 1937-08-21 1938-09-20 Colt S Mfg Co Automatic circuit breaker
US2266537A (en) * 1937-02-16 1941-12-16 William B Elmer Snap acting device
GB560434A (en) * 1942-12-31 1944-04-04 Frederick Cecil Heayberd Improvements in or relating to bi-metallic electric cut-outs
US2453546A (en) * 1944-10-30 1948-11-09 Metals & Controls Corp Circuit breaker
US2520873A (en) * 1942-10-19 1950-08-29 F A Smith Mfg Company Manually operable thermostatic switch assembly
FR1038547A (fr) * 1951-06-20 1953-09-29 Coupe-circuit automatique
US2768262A (en) * 1954-05-31 1956-10-23 Allard Georges Electric cut-out switches

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE670790C (de) * 1936-09-23 1939-01-25 Stotz Kontakt Gmbh Thermisch wirkender Selbstschalter
DE698284C (de) * 1938-04-05 1940-11-06 Stotz Kontakt Gmbh Thermisch wirkender Selbstschalter

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2266537A (en) * 1937-02-16 1941-12-16 William B Elmer Snap acting device
US2130368A (en) * 1937-08-21 1938-09-20 Colt S Mfg Co Automatic circuit breaker
US2520873A (en) * 1942-10-19 1950-08-29 F A Smith Mfg Company Manually operable thermostatic switch assembly
GB560434A (en) * 1942-12-31 1944-04-04 Frederick Cecil Heayberd Improvements in or relating to bi-metallic electric cut-outs
US2453546A (en) * 1944-10-30 1948-11-09 Metals & Controls Corp Circuit breaker
FR1038547A (fr) * 1951-06-20 1953-09-29 Coupe-circuit automatique
FR62546E (fr) * 1951-06-20 1955-06-15 Coupe-circuit automatique
US2768262A (en) * 1954-05-31 1956-10-23 Allard Georges Electric cut-out switches

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3135848A (en) * 1960-11-21 1964-06-02 Mechanical Products Inc Convenience outlet and circuit breaker device
US3192346A (en) * 1963-06-03 1965-06-29 Gen Electric Current and temperature snap acting devices
US3246107A (en) * 1963-11-04 1966-04-12 United Carr Inc Non-resetting thermally responsive switch
US3275773A (en) * 1964-04-09 1966-09-27 Grover Products Corp Over-center snap switch
US5742219A (en) * 1994-04-28 1998-04-21 Siemens Electromechanical Components, Inc. Switchable circuit breaker
US5918361A (en) * 1994-04-28 1999-07-06 Siemens Electromechanical Components, Inc. Method of assembling a switchable circuit breaker and reducing tease-ability

Also Published As

Publication number Publication date
GB807704A (en) 1959-01-21
DE1099042B (de) 1961-02-09
NL216475A (en, 2012)
NL101850C (en, 2012)
CH336488A (fr) 1959-02-28
BE556706A (en, 2012)
FR1150119A (fr) 1958-01-08

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