US2467653A - Electric cutout - Google Patents

Electric cutout Download PDF

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Publication number
US2467653A
US2467653A US9049A US904948A US2467653A US 2467653 A US2467653 A US 2467653A US 9049 A US9049 A US 9049A US 904948 A US904948 A US 904948A US 2467653 A US2467653 A US 2467653A
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US
United States
Prior art keywords
blade
contact
transversal
spring
pusher
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
US9049A
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English (en)
Inventor
Berthier Emile Andre
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.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2467653A publication Critical patent/US2467653A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/22—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release
    • H01H73/30—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release reset by push-button, pull-knob or slide
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H01R13/713—Structural association with built-in electrical component with built-in switch the switch being a safety switch

Definitions

  • the subject of the present invention is an electric cut-out designed to break an electric circuit when the value of the current exceeds a deter mined nominal value. A small excess of current causes it to operate. A dead short-circuit even repeated several times and involving considerable overloads Causes its operation without harm to its parts.
  • This cut-out is adapted more particularly for the protection of small power motors, domestic power and lighting installations, electric equipment or' vehicles, and in general ⁇ any electric circuits where a small excess current as well as a short-circuit may involve damage or accident.
  • a moving con-tact is carried by a flexible blade held in the set, circuit mak-ing position by engagement with a latch blade rockable on a -push rod and acted upon by a spring which lholds it engaged with the flexible blade, the push rod being itself held in its corresponding inward position by a pawl under spring action, operation of the cutout being caused by deflection of a bimetallic stri-p in series with the controlled circuit, which presses the latch blade into a housing in the lpush rod, so releasing the flexible blade which, being suddenly retracted, opens the circuit and strikes the tail end of the -pawl thereby releasing the push rod which a spring pushes into its outer, released position, the rocking blade at the same time reengaging the flexible blade.
  • This re-engagement enables :the cut-out to be reset by depressing the push rod which is re-engaged by the pawl, while the flexible blade is returned ⁇ to contact making position
  • a release button can be Iprovided which acts upon ya lever to rock it, the lever either acting on the tail end of the pawl or pushing the rocking blade into its housing.
  • Figures 1 and 2 are vertical sections of :the cutout in set position, taken respectively on the line I-I of Figure 2 and 2-2 of Figure 1.
  • Figure 3 is a vertical section on the line I-I of Figure 2, but with the cut-out after operation, i. e. with the circuit opened.
  • Figures 4 and 5 are detail vertical sections of a modification of the contacts, shown respectively open, on the line 'l--fI of Figure 5 and closed, on the line 5--5 of Figure 4.
  • Figures 6 and 7 are similar views of another modification of the contacts shown respectively 2 open, on Ithe line ⁇ (i--E of Figure 7, and closed, on the line 'I-l of Figure 6.
  • Figure 8 is an elevation of one form of the bimetallic stri-p.
  • Figure 9 shows the strip in side View in normal condition and also flexed.
  • Figures 1G to 12 are vertical sections of the cut-out, in set position, provided with another form of reiease, taken respectively on the line Ill-I0 of Figure ll, the line II--II of Figure 10 andthe line i2-l2 of Figure 10.
  • igures 13 and 14 are views of another form of the bimetallic strip, shown respectively in elevation and formed into a helix.
  • the cut-out comprises a base 2 of insulating material supporting the mechanism which is protected by a hood 3 also of insulating material. This hood is iixed on the base by screws 4.
  • the main frame 5, reinforced by a web E supports the parts associated with the moving Contact I5 and a terminal 'l screwed into an angle bracket 8 ( Figure 3), the yterminal and bracket both being insulated electrically from the frame 5.
  • a ⁇ bifurcated bimetallic s-trip 9 controlling the operation of the cut-out is secured by screws II to the 4frame 5 to which is electrically connected one of its limbs while the other limb, insulated from the frame is connected to the angle-bracket 8, that is to the terminal l.
  • the bimetallic strip At its end the bimetallic strip carries an insulated knob I2 abutting against a latch ⁇ blade I3.
  • a blade lil is anchored to the frame 5 by a spring I5 consisting of several leaves of small thickness which afford it greater flexibility and robustness. To its other end is secured a spring tongue l? carrying the moving contact I5.
  • a latch roller I8 pivots on a spindle pressed in the ⁇ blade i4 (Fig. 2).
  • a Ipush rod I9 slides in the upper part of the frame 5 and ⁇ is guided at its lower end by a guide 20 fixed to the base of the frame 5.
  • the latch blade I3 is pivoted by its upper end 22 to ⁇ the rod or lpillar i9 at 2i in a groove 23 in which it is housed, a spring 24 urging it out of the housing groove so :that it retains the blade I4 when the cut-out is set by engagement of :the roller I8 in a notch 31 of blade I3.
  • a pawl 2B urged by a spring 25 engages a notch in the Ipush rod I9 and so holds the latter in its innermost position; the push rod I9 terminates in a setting press-button 2l.
  • a release button Z8 subjected to a return spring 29, can act upon the end of -a lever 3i pivoted on the same pin 36 as Ithe pawl 26, the other end of the lever 3
  • the second terminal 32 h-olds rto the base 2 ( Figure 1) a block 33 of insulating material about which is a winding 34.
  • a magnetic core 35 -passes through the block 33 and carries the fixed contact 36.
  • One end of the winding 34 is connected to the terminal 32 and its other end to the contact 36 through the magnetic core 3 5.
  • the terminals 'I and 32 can be in the form of slotted pins as shown in Figures 1 and 3, of standard diameter and spacing, or in the form of spring contacts, or of any other form adapted to carry the current.
  • the cross-section of the two limbs of the strip is made such that it can carry the norrninal current without noticeable deflection.
  • the strip deflects under the heating effect and its end 9a, through the insulated knob I2 pushes the latch blade I3 into the housing in the push rod I9 ( Figure 2).
  • roller I8 leaves the notch 3l of the blade I3 and, the blade I4 being released, immediately obeys its spring I6, so violently withdrawing the moving contact I5 from the fixed contact 35.
  • the button 26 enables the cut-out to be operated without application to it of an excessive current.
  • the button 28 acts on the end of the lever 3
  • the bent form of the blade I4 enables the axis of the roller I8 to be exactly perpendicular to the edge of the notch 3l in the blade I3. This important condition ensures reliable operation of the roller without lateral friction.
  • the contacts can be constructed in various ways to ensure maximum eiectiveness and minimum wear of the device.
  • Figures 1 to 3 show a type of contact suitable for very low currents.
  • the bimetallic strip necessarily of small section would be rapidly damaged by the heavy current resulting from a dead short circuit, if no special provision were made.
  • a It is constituted by a wire of high resistivity and high melting point, of heavy enough section not to have noticeable resistance when carrying the nominal current. But in the case of a short circuit its resistance is suilicient to limit the current. In this way it protects the bimetallic strip until release, which is practically immediate, is completed.
  • the contact 36 can be of carbon to avoid welding together of the contacts at break.
  • Figures 4 and 5 relate to an arrangement of multiple contacts.
  • the multiplication of the contacts reduces the heating eect for the same equivalent total surface and it ensures better.
  • the arrangement shown comprises principal contact 4I and 42, 43 and lid, of metal, and auxiliary contacts 45 and 46.
  • the contact l5 of carbon, is movable. This enables the break to take place in two stages.
  • the carbon contact 65 is connected to a plate 49 and so to the terminal 32, by a flexible lead 5I providing for the passage of current between these parts.
  • Figures 6 and 7 show a modication of this arrangement.
  • the contacts I5 and 46 are identical with and have the same purpose as those described above.
  • the principal, metallic contacts 52 and 56 instead of being fixed like the contacts 4I and 43, are movable about an axis 53 and rise slightly at break under the action of springs 54 and 55. This rise ensures a slight sliding of the cylindrical surface of the contacts 52 and 56 on the contact 5l. This sliding cleans the surfaces of the contacts and the break does not take place at the same points as does the passage of current during service.
  • the pressures on the contacts 52 and 55 are equalised because the contact 5I can rock on the rivet 58 which secures it to the blade I4 and the spring I5 tends to push spring 59 abutting a support. 6! carried by a distance-piece 62.
  • the button also carries a ramp 63 having an inclined prole which as it moves inwards causes a lever E5 pivoted on the dist ncepiece 62 to rock in the direction of the arrow; 5 64 ( Figure 11).
  • the width and thickness or ⁇ the limbs of the bimetallic strip must be reduced, because it is the cross-section of this strip which de 20 mines the nominal current of the cut-out, as the fragility of the limbs increases proportion-- ately with the reduction of the cross-section, the mechanical effort of which the strip capable is also limited accordingly.
  • the bimetallic strip 69 ( Figures 10, l2 and ifi) can be formed into a helix in such a way th strip is obtained having the same dimension in 30 length as the strip 9 of Figure 1.
  • An electric cut-out comprising a support, at least one contact piece carried rigidly by said support cooperating movable contact pieces, an at least partly yielding member carrying said movable contact pieces in front of the first contact piece, a transversal blade normally engaging last mentioned contact carrying member and holding it in its operative position, yielding means urging the transversal blade into its operative position, a heat sensitive member carried by the support, a pusher rod movably carried by the support and housing the transversal blade and associated yielding means, a catch and spring system holding the pusher rod in its depressed position in which the transversal blade engages the operative contact carrying member, means whereby the heat sensitive member, when heated, urges the transversal blade carried by the pusher member in depressed position against the action of its associated yielding means into its inoperative position, means whereby the contact carrying member when released with rererence to the transversal blade enters its inoperative position and acts on the catch and spring system for releasing the pusher member, a spring urging the pusher member
  • An electric cut-out comprising a support, at least one contact piece carried rigidly by said support, cooperating movable contact pieces, an at least partly yielding member carrying said movable contact pieces in front of the rst contact piece, a transversal blade normally engaging last mentioned contact carrying member and holding it in its operative position, yielding means urging the transversal blade into its operative position, a heat sensitive member carried by the support, a pusher rod movably carried by the support and housing the transversal blade and associated yielding means, a catch and spring system holding the pusher rod in its depressed position in which the transversal blade engages the operative contact carrying member, means whereby the heat sensitive member, when heated, urges the transversal blade carried by the pusher member in depressed position against the action of its associated yielding means into its inoperative position, means whereby the contact carrying member when released with reference to the transversal blade enters its inoperative position and acts on the catch and spring system for releasing the pusher member, a spring urging the pusher member into its
  • An electric cut-out comprising a support, at least one contact-piece carried rigidly by said support, cooperating movable contact pieces, a further movable contact piece, an at least partly yielding member carrying all said movable contact piece in front of the rst contact pieces, a normally stationary carbon contact piece of same polarity as the rst mentioned contact piece, means whereby the carbon contact-piece is adapted to .continue feeding current to the corresponding movable contact piece during a short period after the breaking of the circuit through the first-mentioned stationary contact piece, a transversal blade normally engaging last mentioned ⁇ Contact carrying member and holding it in its operative position, yielding means urging the transversal blade into its operative position, a heat sensitive member carried by the support, a pusher rod slidably carried by the support and housing the transversal blade and associated yielding means, a vcatch and spring system holding the pusher rod in its depressed position in which the transversal blade engages the operative contact carrying member,
  • An electric cut-out comprising a support, at least one contact piece carried rigidly by said support, cooperating movable contact pieces, an at least partly yielding member carrying said movable contact pieces in front of the rst contact piece, a transversal blade normally engaging last mentioned contact carrying member and holding it in its operative position, yielding means urging the transversal blade into its operative position, a bi-metallic heat sensitive strip member carried by the support, a pusher rod slidably carried by the support and housing the transversal blade and associated yielding means, a catch and spring system holding the pusher rod in its depressed position in which the transversal blade engages the operative Contact carrying member, means whereby the heat sensitive member, when heated, urges the transversal blade carried by the pusher member in depressed position against the action of its associated yielding means into its inoperative position, means whereby the contact carrying member' when released withreference to' the tiansvr'sai' blade enters its inoperative position and acts on the catch and spring system for releasing
  • An electric cut-out comprising a support, atv least one contact-piece carried rigidly by said:
  • An electric cut-out comprising a support, associated rockable rounded contact pieces of same polarity, a pivot rigid with the support for said contact pieces, cooperating movable contact pieces, an at least partly yielding member carrying said movable contact pieces in front of the rst contact pieces, springs urging the rockable contact pieces to move round their pivots towards the corresponding movable contact pieces to contact therewith through a substantially large frictional area, a transversal blade normally engaging last mentioned contact carrying member and holding it in its operative position, yielding means ⁇ urging the transversal blade into its operative ⁇ v position, a heat sensitive member carried by the support, a pusher rod slidably carried by the support and housing the transversal blade and associated yielding means, a catch and spring system holding the pusher rod in its depressed position in which the transversal blade engages the operative contact carrying member, means whereby the heat sensitive member, when heated, urges the transversal blade carried by the pushermember in depressed position against the action of its associated yielding means into
  • An electric cut-out comprising a support, at least one Contact piece carried rigidly by said support, cooperating movable contact pieces, an at least partly yielding member carrying said movable contact pieces in front of the rst contact piece, a transversal blade normally engaging last mentioned Contact carrying member and holding it in its operative position, yielding means urging the transversal blade into its operative position, a heat sensitive member carried by the support, a pusher rod slidably carried by the support and housing the transversal blade and associated yielding means, a catch and spring system holding the pusher rod in its depressed position in which the transversal blade engages the operative contact carrying member, means whereby the heat sensitive member, when heated, urges the transversal blade carried by the pusher member in depresssed position against the action of its associated yielding means into its inoperative position, means whereby the contact carrying member when released with reference to the transversal blade enters its inoperative position and acts on the catch and spring system for releasing the pusher member, a spring urging the
  • An electric cut-out comprising a support, at least one contact piece* carried rigidly by said support, cooperating movable contact pieces, an at least partly yielding member carrying said movable contact pieces in front of the first contact piece, a transversal blade normally engaging last mentioned Contact carrying member and holding it in its operative position, yielding means urging the transversal blade into its operative position, a spirally twisted bi-metallic strip member carried by the frame at one end and the free end of which is adapted to move under the action of heat, a pusher rod slidably carried by the support and housing the transversal blade and associated yielding means, a catch and spring system holding the pusher rod n its depressed position in which the transversal blade engages the operative contact carrying member, means whereby the bi-metallic member, when heated, urges the transversal blade carried by the pusher member in depressed position against the action of its associated yielding means into its inoperative position, means whereby the contact carrying member when released with reference to the transversal blade enters its inoperative

Landscapes

  • Thermally Actuated Switches (AREA)
  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
US9049A 1944-02-16 1948-02-18 Electric cutout Expired - Lifetime US2467653A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR842082X 1944-02-16

Publications (1)

Publication Number Publication Date
US2467653A true US2467653A (en) 1949-04-19

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Application Number Title Priority Date Filing Date
US9049A Expired - Lifetime US2467653A (en) 1944-02-16 1948-02-18 Electric cutout

Country Status (6)

Country Link
US (1) US2467653A (de)
BE (1) BE478775A (de)
CH (1) CH276832A (de)
DE (1) DE842082C (de)
FR (2) FR901983A (de)
GB (2) GB635516A (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2681966A (en) * 1951-07-12 1954-06-22 Fed Electric Prod Co Circuit breaker enclosure and mounting
US2700086A (en) * 1950-08-16 1955-01-18 Gen Electric Electric circuit breaker
US2808486A (en) * 1953-02-16 1957-10-01 Berthier Emile Andre Manually operable trip-free circuit breaker
US2824934A (en) * 1954-12-09 1958-02-25 Westinghouse Electric Corp Visible-blade arc-extinguishing disconnecting switch
US2833888A (en) * 1956-02-18 1958-05-06 Labinal Ets Circuit breakers
US2835765A (en) * 1954-11-22 1958-05-20 Ite Circuit Breaker Ltd Circuit breaker
DE1030916B (de) * 1951-03-27 1958-05-29 Georges Allard Elektrischer Kleinselbstschalter
US2838635A (en) * 1956-07-16 1958-06-10 Mechanical Products Inc Electric switch having automatic current overload protection
US2849576A (en) * 1957-05-21 1958-08-26 Grauco Products Inc Thermal relays
US3102933A (en) * 1960-04-13 1963-09-03 Berthier Emile Andre Multipolar circuit maker and breaker
US20070170047A1 (en) * 2005-03-12 2007-07-26 Ellenberger & Poensgen Gmbh Protective switch for protecting a circuit
US20070193297A1 (en) * 2006-02-21 2007-08-23 Healthcare Products International, Inc. Method and device for the transportation of temperature sensitive materials

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL89467C (de) * 1953-02-16
DE1169563B (de) * 1957-09-25 1964-05-06 Licentia Gmbh Elektrischer Leistungsschalter
DE2558942C2 (de) * 1975-12-29 1978-01-26 Ellenberger & Poensgen Gmbh, 8503 Altdorf Schalter mit einem kippbaren Schalthebel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2700086A (en) * 1950-08-16 1955-01-18 Gen Electric Electric circuit breaker
DE1030916B (de) * 1951-03-27 1958-05-29 Georges Allard Elektrischer Kleinselbstschalter
US2681966A (en) * 1951-07-12 1954-06-22 Fed Electric Prod Co Circuit breaker enclosure and mounting
US2808486A (en) * 1953-02-16 1957-10-01 Berthier Emile Andre Manually operable trip-free circuit breaker
US2835765A (en) * 1954-11-22 1958-05-20 Ite Circuit Breaker Ltd Circuit breaker
US2824934A (en) * 1954-12-09 1958-02-25 Westinghouse Electric Corp Visible-blade arc-extinguishing disconnecting switch
US2833888A (en) * 1956-02-18 1958-05-06 Labinal Ets Circuit breakers
US2838635A (en) * 1956-07-16 1958-06-10 Mechanical Products Inc Electric switch having automatic current overload protection
US2849576A (en) * 1957-05-21 1958-08-26 Grauco Products Inc Thermal relays
US3102933A (en) * 1960-04-13 1963-09-03 Berthier Emile Andre Multipolar circuit maker and breaker
US20070170047A1 (en) * 2005-03-12 2007-07-26 Ellenberger & Poensgen Gmbh Protective switch for protecting a circuit
US7312687B2 (en) 2005-03-12 2007-12-25 Ellenberg & Poensgen Gmbh Protective switch for protecting a circuit
CN1993791B (zh) * 2005-03-12 2010-06-09 埃伦贝格尔及珀恩斯根有限公司 用于保护电路的保护开关
US20070193297A1 (en) * 2006-02-21 2007-08-23 Healthcare Products International, Inc. Method and device for the transportation of temperature sensitive materials

Also Published As

Publication number Publication date
GB642175A (en) 1950-08-30
GB635516A (en) 1950-04-12
FR901983A (fr) 1945-08-14
BE478775A (de)
DE842082C (de) 1952-06-23
FR56924E (fr) 1952-10-09
CH276832A (fr) 1951-07-31

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