EP0020311A1 - Trip lamina for single-pole circuit breakers - Google Patents
Trip lamina for single-pole circuit breakers Download PDFInfo
- Publication number
- EP0020311A1 EP0020311A1 EP80830031A EP80830031A EP0020311A1 EP 0020311 A1 EP0020311 A1 EP 0020311A1 EP 80830031 A EP80830031 A EP 80830031A EP 80830031 A EP80830031 A EP 80830031A EP 0020311 A1 EP0020311 A1 EP 0020311A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lamina
- trip
- shearings
- edges
- calibration screw
- 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.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
-
- 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
Definitions
- This invention relates to a trip lamina for single-pole circuit breakers.
- a trip lamina is preposed to the automatic tripping in the event of an overload and/or short circuit current, said trip lamina being subjected to a bimetallic strip, responsive to the overload current and to a magnetizable armature responsive to the short circuit current, and it is provided with a latching notch or aperture allowing the latching of a tip, or similar members, provided on one end of a latching cradle usually of arcuate shape, and having the other end pivoted on a fixed pin around which it may rotate for a determined angle.
- trip lamina is a simple member, it shows some drawbacks during the production, assembling adjustment or calibration steps.
- the known trip laminae in effect, must be produced with a thickness able to withstand the bending and compressive stress transmitted by the tip of the latching cradle, and to assure a stable latching of the tip itself, also avoiding an umproper tripping if the mechanism is subjected to vibrations.
- the trip laminae achieve a stiffness that counteracts with the bending of the trip lamina, preventing or delaying the tripping in overload or short circuit current conditions.
- trip lamina it is preferred to constrain the trip lamina so that it may rigidly rotate around one of its own ends inserted in a seat provided in the moulded case.
- Said adjustement and recalling means even if they are simply constituted by a screw or by a spring are, in any case, additional.members that weight heavily on the cost of the circuit breaker not only for their price on the market, but also because they require additional operations for mounting and adjusting that cannot be done mechanically.
- the end of the trip lamina which is not constrained in the seat, and that can be provided with a magnetizable armature, is connected to the bimetallic strip, by a screw that functions both as a pulling member between the bimetallic strip and the trip lamina for executing the tripping, and as a calibration mean to define the minimum overload current at which the tripping must take place.
- Said calibration screw needs some means apt to prevent the spontaneous unscrewinq.
- Said means are constituted by particular lacquers, by lock-nuts, or the like, that are time consuming in the assembling and calibration steps and therefore weight heavily on the whole cost of the circuit breaker.
- the present invention relates to a trip lamina that, al- vhou k jh it has the required thickness apt to withstand the combined bending and compressive stress transmitted by the tip of the latching cradle and altough assuring the necessary latching, it shows a low resistance to the bending, so that it may elastically bent under the forces incorporatedd by the bimetallic strip and by the magnetic attraction means and does not require recalling means and adjusting means for its angular latching position, nor additional means for preventing the unscrewing of the calibration screw.
- the trip lamina of the present invention is characterized by an elongate laminar body having its middle portion, of relevant lenght with respect to the whole lenght, provided with shearings that interest the whole thickness of the lamina and executed in the direction perpendicular to the plane of the trip lamina and extending transversely to the longitudinal direction of the same, said shearings having their respective outlets alternatively on both longitudinal edges of the trip lamina, each shearing being so finely executed that its edges meet and rest one on top of the other to render said lamina resistant to the bending and compressive stress transmitted by the tip of the latching cradle, said shearings generating a continuous undulated strip of reduced width on the trip lamina, thus rendering said trip lamina highly flexible, so that it may be bent without remarkable resistance, by the traction embodied by the bimetallic strip or by the magnetic traction means to trip in overload or short circuit current conditions and it is also characterized by the fact that one end of said trip lamina is
- the trip lamina along said middle portion, is provided with substantially equal apertures successively spaced in the same way of said shearings and in each one of which the inner end of a respective shearing has its outlet, so that the flexibility of the undulated strip is increased and the execution of the shearings in a precise manner and without deformation of the same trip lamina is allowed.
- each one of said apertures is provided with a rectilinear side at least, directed as said shearings, each respective shearing being disposed on the prolongement of such a side.
- the end portion of the trip lamina connected to the bimetallic strip through the calibration screw, is provided with a longitudinal slit having its outlet on the ending edge of the same trip lamina and traversing the threaded hole engaging said calibration screw, said longitudinal slit separating said ending portion in two parallel tongues able to assume a respective inclination having contrary slopes with respect to the plane of said trip lamina, so that the edges of said threaded hole engaging the calibration screw are obliquely pressed against the threads of said calibration screw preventing the spontaneous unscrewing of the latter.
- said ending portion of the trip lamina is provided with a retaining hole, from which said longitudinal slit initiates a magnetizable movable armature, in the form of a plate, being provided with a projection able to be forced with snapping insertion through said retaining hole.
- Said magnetizable movable armature is provided, at its lower corners, with two respective projecting bearings, designed to rest on said tongues, near the outer edges of the latter, as to oblige said tongues to assume the due inclination with respect to the plane of the trip lamina, when said projection of the magnetizable movable armature is forced through said retaining hole.
- Figure 1 refers to a single-pole circuit breaker comprising a moulded case 1, composed by two meeting shells one of which has been removed in the drawing, said moulded case accomodating a snap mechanism that will not be specified in details.
- said snap mechanism may be every known one provi ded for moving a movable contact 2 from a closed position to an open position, with respect to a stationary contact 2', either for the displacement of the manual operating member 3 or for the tripping of a latching cradle 4, provided with a tip 5 that latches in a notch or hole carried by a trip lamina 6, the latter being connected to a bimetallic strip 7 by means of a calibration screw 22.
- the tip 5 transmits to the trip lamina 6 a force generated by a spring 4' and that constitutes a bending and compressive stress for the trip lamina itself.
- the trip lamina 6, according to the present invention, is show in figures from 2 to 5.
- Said trip lamina 6 is preferably obtained from steel band having a suitabLe thickness.
- said trip lamina 6 is provided with a relief 8, preferably shaped as a spherical segment, obtained bv forming the steel band, so that said upper end 6" can he received in a seat 9, where two opposed walls 10 and 11 contain therebetween, almost exactly, the thickness of the blade and the projection 8, preventing said upper end 6" from every rotatable movement.
- said seat 9 is provided with a peripheral slot 12 directed inwardly the moulded case, having a width a bit greater than the thickness of the trip lamina 6 and through which said trip lamina may pass, so that the upper end 6" is trapped in the seat 9 and so that the possibility of a rotation does not exist with respect to said seat 9.
- a middle longitudinal portion of the trip lamina extending along a great part of the whole lenght of the same trip lamina, is provided with transversal shearings 13 that have their outlets alternatively on both the longitudinal edges of the trip lamina.
- apertures 14 are provided, having at least one side 15 directed transversely to the longitudinal direction of the trip lamina 6, so that for every hole 14, a respective shearing 13 is disposed on the prolongement of said side 15.
- each one of the shearings 13 is so finely executed that its edges 13' and 13" couple so that the edge of the first constitutes a shoulder for the other one.
- apertures 14 allows the production of shearings 13 in a precise manner, without deforming the trip lamina 6 and it also allows to size the width of the undulated strip 16 for establishing the required flexibility of the trip lamina 6.
- each shearing 13 prevents the trip lamina 6 from being bent under the benting and compressive stress embodied by the tip 5 of the latching cradle 4.
- the shearings 13 are produced by blankinq in a direction perpendicular to the plane of the trip lamina 6, to assure the maximum mutual shouldinq between the edges 13' and 13".
- a first hole 17 is provided designed to be latched by the tip 5 of Lhe latching cradle 4.
- a second hole 18 is provided below the first hole 17 for receiving a projection 19 carried by a movable armature 2 of maqnetizable iron, designed to be mounted on the trip lamina 6.
- a third hole 21 is provided for the engagement of a calibration screw 22 passinq through a hole 23 presented by the movable armature 20.
- the first, the second and the third hole respectively 17, 18 and 21 are disposed alonq the central line of the trip lamina 6 and along said central line a slit 24 is provided, extending from the lower edge of the second hole 18 up to the lower edqe 6' of the trip lamina 6 and traversing the third hole 21.
- Said slit 24 separates a lower portion of the trip lamina in two juxtaposed tongues 25 and 26 that may be bent to assume a deflection contrary with respect to the plane of the trip lamina, as shown in figures 2 and 5.
- Two projecting bearings 27 and 28 are provided on the lower corners of the movable armature 20, having the aim to cause the tonques 25 and 26 to assume said inclined position, so that when the movable armature is mounted on the trip lamina and a pressure is utilised in correspondence of the slit 24 by means of a suitable fixture, said projecting bearing 27 and 28 act on the outer edqes of the tongues 25 and 26 causing the latter to assume the desired deflection that will be kept by the traction embodied through the calibration screw 22.
- the assembly of the movable armature 20 is accomplished quickly by introducing the projection 19 through the hole 18, the introduction taking place with a snap movement, because of the elastic enlargement of the hole 18 permitted by the slit 24.
- the pressure on the slit 24 is arrested, so that the tongues 25 and 26 have the tendency to elastically return to the plane of the trip lamina, but they are prevented from doinq so by the threads of the same calibration screw.
- the edges of the third hole 21 utilise a pressure on the threads of the calibration screw generating a relevant friction that prevents the unscrewing of the calibration screw 22.
- the calibration screw 22 once it has been calibrated, is permanently locked in its position without requiring additive members or operations.
Landscapes
- Breakers (AREA)
- Switch Cases, Indication, And Locking (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
- Tumbler Switches (AREA)
- Manufacture Of Switches (AREA)
- Keying Circuit Devices (AREA)
- Electrophonic Musical Instruments (AREA)
- Push-Button Switches (AREA)
- Cookers (AREA)
- Thermally Actuated Switches (AREA)
Abstract
Description
- This invention relates to a trip lamina for single-pole circuit breakers.
- According to the known art, in some kinds of single-pole circuit breakers employing an over center mechanism, a trip lamina is preposed to the automatic tripping in the event of an overload and/or short circuit current, said trip lamina being subjected to a bimetallic strip, responsive to the overload current and to a magnetizable armature responsive to the short circuit current, and it is provided with a latching notch or aperture allowing the latching of a tip, or similar members, provided on one end of a latching cradle usually of arcuate shape, and having the other end pivoted on a fixed pin around which it may rotate for a determined angle.
- When said latching cradle is latched to said trip lamina, it keeps steadly the stationary and the movable contacts in a close position.
- When, on the other end, an anomalous increasing of the current happens, i.e. an overload or short circuit current, said trip lamina is retracted by the bimetallic strip or by the magnetizable armature, causing the tripping of the latching cradle, so that the latter, under the traction on a suitable spring, rotates thus causing the snap in the open position of the over center mechanism and therefore the sudden opening of the movable contact with respect to the stationary contact.
- Even though said trip lamina is a simple member, it shows some drawbacks during the production, assembling adjustment or calibration steps.
- The known trip laminae, in effect, must be produced with a thickness able to withstand the bending and compressive stress transmitted by the tip of the latching cradle, and to assure a stable latching of the tip itself, also avoiding an umproper tripping if the mechanism is subjected to vibrations.
- In this way the trip laminae achieve a stiffness that counteracts with the bending of the trip lamina, preventing or delaying the tripping in overload or short circuit current conditions.
- Consequently, it is preferred to constrain the trip lamina so that it may rigidly rotate around one of its own ends inserted in a seat provided in the moulded case.
- This solution, however, requires the employment of adjustement means to adjust the angular latching position and the employment of elastic means to recall the same lamina in said latching position after every displacement caused by the bimetallic strip or by the magnetic attractions means.
- Said adjustement and recalling means even if they are simply constituted by a screw or by a spring are, in any case, additional.members that weight heavily on the cost of the circuit breaker not only for their price on the market, but also because they require additional operations for mounting and adjusting that cannot be done mechanically.
- Moreover, the end of the trip lamina which is not constrained in the seat, and that can be provided with a magnetizable armature, is connected to the bimetallic strip, by a screw that functions both as a pulling member between the bimetallic strip and the trip lamina for executing the tripping, and as a calibration mean to define the minimum overload current at which the tripping must take place.
- Said calibration screw needs some means apt to prevent the spontaneous unscrewinq.
- Said means, accordinq to the known art, are constituted by particular lacquers, by lock-nuts, or the like, that are time consuming in the assembling and calibration steps and therefore weight heavily on the whole cost of the circuit breaker.
- The present invention relates to a trip lamina that, al- vhoukjh it has the required thickness apt to withstand the combined bending and compressive stress transmitted by the tip of the latching cradle and altough assuring the necessary latching, it shows a low resistance to the bending, so that it may elastically bent under the forces exerced by the bimetallic strip and by the magnetic attraction means and does not require recalling means and adjusting means for its angular latching position, nor additional means for preventing the unscrewing of the calibration screw.
- The trip lamina of the present invention is characterized by an elongate laminar body having its middle portion, of relevant lenght with respect to the whole lenght, provided with shearings that interest the whole thickness of the lamina and executed in the direction perpendicular to the plane of the trip lamina and extending transversely to the longitudinal direction of the same, said shearings having their respective outlets alternatively on both longitudinal edges of the trip lamina, each shearing being so finely executed that its edges meet and rest one on top of the other to render said lamina resistant to the bending and compressive stress transmitted by the tip of the latching cradle, said shearings generating a continuous undulated strip of reduced width on the trip lamina, thus rendering said trip lamina highly flexible, so that it may be bent without remarkable resistance, by the traction exerced by the bimetallic strip or by the magnetic traction means to trip in overload or short circuit current conditions and it is also characterized by the fact that one end of said trip lamina is received in a seat provided by the moulded case and it is so constrained that it may not rotate with respect to said seat.
- In a preferred embodiment of the invention, the trip lamina, along said middle portion, is provided with substantially equal apertures successively spaced in the same way of said shearings and in each one of which the inner end of a respective shearing has its outlet, so that the flexibility of the undulated strip is increased and the execution of the shearings in a precise manner and without deformation of the same trip lamina is allowed.
- In a further preferred embodiment of the invention, each one of said apertures is provided with a rectilinear side at least, directed as said shearings, each respective shearing being disposed on the prolongement of such a side.
- In a further important embodiment of the invention, the end portion of the trip lamina, connected to the bimetallic strip through the calibration screw, is provided with a longitudinal slit having its outlet on the ending edge of the same trip lamina and traversing the threaded hole engaging said calibration screw, said longitudinal slit separating said ending portion in two parallel tongues able to assume a respective inclination having contrary slopes with respect to the plane of said trip lamina, so that the edges of said threaded hole engaging the calibration screw are obliquely pressed against the threads of said calibration screw preventing the spontaneous unscrewing of the latter.
- According to a last embodiment of the invention, said ending portion of the trip lamina is provided with a retaining hole, from which said longitudinal slit initiates a magnetizable movable armature, in the form of a plate, being provided with a projection able to be forced with snapping insertion through said retaining hole.
- Said magnetizable movable armature is provided, at its lower corners, with two respective projecting bearings, designed to rest on said tongues, near the outer edges of the latter, as to oblige said tongues to assume the due inclination with respect to the plane of the trip lamina, when said projection of the magnetizable movable armature is forced through said retaining hole.
- An embodiment of the invention, by way of example, will be hereinafter disclosed referring to the accompanying drawings, wherein:
- Figure 1 is a view of a single-pole circuit breaker, having a shell of the moulded case removed and to which the trip lamina of the invention is applied.
- Figure 2 is an exploded view, in enlarged scale, of the trip lamina, of the magnetizable armature and of the calibration screw.
- Figure 3 is a view in enlarged scale of a portion of fig. 1 showing the seat provided in the moulded case receiving the fixed end of the trip lamina.
- Figures 4 and 5 shows, in more entarqued scale, a side view and a bottom view respectively, of the assembling of the trip lamina, the magnetizable movable armature and the calibration screw.
- Figure 1 refers to a single-pole circuit breaker comprising a
moulded case 1, composed by two meeting shells one of which has been removed in the drawing, said moulded case accomodating a snap mechanism that will not be specified in details. - In effect said snap mechanism, may be every known one provi ded for moving a
movable contact 2 from a closed position to an open position, with respect to a stationary contact 2', either for the displacement of themanual operating member 3 or for the tripping of alatching cradle 4, provided with atip 5 that latches in a notch or hole carried by atrip lamina 6, the latter being connected to abimetallic strip 7 by means of acalibration screw 22. - The particular snap mechanism shown in fig. 1, however, constitutes the object of a separated patent application, filed simultaneously to this application.
- From said snap mechanism one may note that the
tip 5 transmits to the trip lamina 6 a force generated by a spring 4' and that constitutes a bending and compressive stress for the trip lamina itself. - The
trip lamina 6, according to the present invention, is show in figures from 2 to 5. - Said
trip lamina 6 is preferably obtained from steel band having a suitabLe thickness. - At the
upper end 6" saidtrip lamina 6 is provided with arelief 8, preferably shaped as a spherical segment, obtained bv forming the steel band, so that saidupper end 6" can he received in a seat 9, where twoopposed walls projection 8, preventing saidupper end 6" from every rotatable movement. Furthermore said seat 9 is provided with aperipheral slot 12 directed inwardly the moulded case, having a width a bit greater than the thickness of thetrip lamina 6 and through which said trip lamina may pass, so that theupper end 6" is trapped in the seat 9 and so that the possibility of a rotation does not exist with respect to said seat 9. - A middle longitudinal portion of the trip lamina, extending along a great part of the whole lenght of the same trip lamina, is provided with
transversal shearings 13 that have their outlets alternatively on both the longitudinal edges of the trip lamina. - Preferably, along said middle portion,
apertures 14 are provided, having at least oneside 15 directed transversely to the longitudinal direction of thetrip lamina 6, so that for everyhole 14, arespective shearing 13 is disposed on the prolongement of saidside 15. - Moreover, each one of the
shearings 13 is so finely executed that itsedges 13' and 13" couple so that the edge of the first constitutes a shoulder for the other one. - The disposition of the shearings 13and the eventual dispos ition of
apertures 11 generates on thetrip lamina 6 an undulatedcontinuous strip 16, having particularly, square ondulation, each side of the ondulation constituting a flexible element that furnishes a great elastic flexibility to the trip lamina, greatly reducing its resistance to the bending, while having a relatively great thickness. - Moreover the disposition of
apertures 14 allows the production ofshearings 13 in a precise manner, without deforming thetrip lamina 6 and it also allows to size the width of the undulatedstrip 16 for establishing the required flexibility of thetrip lamina 6. - Moreover, the mutual shoulding between the
edges 13' and 13" of each shearing 13 prevents thetrip lamina 6 from being bent under the benting and compressive stress exerced by thetip 5 of thelatching cradle 4. - This advantage could not be obtained when a very thin flexible trip lamina was employed.
- The
shearings 13 are produced by blankinq in a direction perpendicular to the plane of thetrip lamina 6, to assure the maximum mutual shouldinq between theedges 13' and 13". Below the middle portion occupied by theshearings 13, afirst hole 17 is provided designed to be latched by thetip 5 ofLhe latching cradle 4. Asecond hole 18 is provided below thefirst hole 17 for receiving aprojection 19 carried by amovable armature 2 of maqnetizable iron, designed to be mounted on thetrip lamina 6. - A
third hole 21 is provided for the engagement of acalibration screw 22 passinq through ahole 23 presented by themovable armature 20. - The first, the second and the third hole respectively 17, 18 and 21 are disposed alonq the central line of the
trip lamina 6 and along said central line aslit 24 is provided, extending from the lower edge of thesecond hole 18 up to the lower edqe 6' of thetrip lamina 6 and traversing thethird hole 21. - Said slit 24 separates a lower portion of the trip lamina in two juxtaposed
tongues - Two projecting
bearings movable armature 20, having the aim to cause thetonques slit 24 by means of a suitable fixture, said projecting bearing 27 and 28 act on the outer edqes of thetongues calibration screw 22. - The assembly of the
movable armature 20 is accomplished quickly by introducing theprojection 19 through thehole 18, the introduction taking place with a snap movement, because of the elastic enlargement of thehole 18 permitted by theslit 24. - After the calibration screw has been screwed, the pressure on the
slit 24 is arrested, so that thetongues - As a consequence, the edges of the
third hole 21 exerce a pressure on the threads of the calibration screw generating a relevant friction that prevents the unscrewing of thecalibration screw 22. In this way, the calibration screw 22, once it has been calibrated, is permanently locked in its position without requiring additive members or operations. - This description is made only by way of example and not as a limitation to the scope of the invention, many variations and modifications may be made and will become apparent to those skilled in the art. Said modifications fal] within the invention as intended by the appended claims.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT80830031T ATE2164T1 (en) | 1979-06-01 | 1980-05-27 | TRIP CAM FOR SINGLE-POLE CIRCUIT BREAKER. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2320979 | 1979-06-01 | ||
IT23209/79A IT1121758B (en) | 1979-06-01 | 1979-06-01 | RELEASE PLATE FOR SINGLE-POLE AUTOMATIC SWITCHES |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0020311A1 true EP0020311A1 (en) | 1980-12-10 |
EP0020311B1 EP0020311B1 (en) | 1982-12-29 |
Family
ID=11204905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP80830031A Expired EP0020311B1 (en) | 1979-06-01 | 1980-05-27 | Trip lamina for single-pole circuit breakers |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0020311B1 (en) |
AT (1) | ATE2164T1 (en) |
BR (1) | BR8002195A (en) |
DE (1) | DE3061494D1 (en) |
ES (1) | ES255504Y (en) |
IT (1) | IT1121758B (en) |
MX (1) | MX148400A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106449286A (en) * | 2015-08-11 | 2017-02-22 | 浙江正泰电器股份有限公司 | Circuit breaker installing structure and assembling method |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2308401A (en) * | 1939-04-27 | 1943-01-12 | Chase Shawmut Co | Thermal and electromagnetic switch opening mechanism |
US2824191A (en) * | 1953-02-05 | 1958-02-18 | Fed Electric Prod Co | Circuit breakers |
-
1979
- 1979-06-01 IT IT23209/79A patent/IT1121758B/en active
-
1980
- 1980-02-28 ES ES1980255504U patent/ES255504Y/en not_active Expired
- 1980-03-10 MX MX181487A patent/MX148400A/en unknown
- 1980-04-09 BR BR8002195A patent/BR8002195A/en unknown
- 1980-05-27 AT AT80830031T patent/ATE2164T1/en not_active IP Right Cessation
- 1980-05-27 DE DE8080830031T patent/DE3061494D1/en not_active Expired
- 1980-05-27 EP EP80830031A patent/EP0020311B1/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2308401A (en) * | 1939-04-27 | 1943-01-12 | Chase Shawmut Co | Thermal and electromagnetic switch opening mechanism |
US2824191A (en) * | 1953-02-05 | 1958-02-18 | Fed Electric Prod Co | Circuit breakers |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106449286A (en) * | 2015-08-11 | 2017-02-22 | 浙江正泰电器股份有限公司 | Circuit breaker installing structure and assembling method |
CN106449286B (en) * | 2015-08-11 | 2019-05-28 | 浙江正泰电器股份有限公司 | The mounting structure and assembly method of breaker |
Also Published As
Publication number | Publication date |
---|---|
DE3061494D1 (en) | 1983-02-03 |
MX148400A (en) | 1983-04-18 |
ATE2164T1 (en) | 1983-01-15 |
IT7923209A0 (en) | 1979-06-01 |
BR8002195A (en) | 1980-12-30 |
ES255504U (en) | 1981-10-01 |
ES255504Y (en) | 1982-04-01 |
IT1121758B (en) | 1986-04-23 |
EP0020311B1 (en) | 1982-12-29 |
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