EP0436448B1 - Electromagnetic relay polarised by a permanent magnet - Google Patents
Electromagnetic relay polarised by a permanent magnet Download PDFInfo
- Publication number
- EP0436448B1 EP0436448B1 EP90420542A EP90420542A EP0436448B1 EP 0436448 B1 EP0436448 B1 EP 0436448B1 EP 90420542 A EP90420542 A EP 90420542A EP 90420542 A EP90420542 A EP 90420542A EP 0436448 B1 EP0436448 B1 EP 0436448B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- core
- flux
- yoke
- relay according
- permanent magnet
- 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
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Classifications
-
- 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
- H01H71/24—Electromagnetic mechanisms
- H01H71/32—Electromagnetic mechanisms having permanently magnetised part
- H01H71/321—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements
- H01H71/322—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements with plunger type armature
Definitions
- Such a relay is described in document EP-A-187055.
- the flux distributor and the permanent magnet are annular to allow the passage of the return spring which bears on the bottom of the magnetic circuit.
- the other end of the spring is housed in a blind hole in the frame.
- the spring housing inside a blind hole in the magnetic circuit increases the overall dimensions of the relay, and the mass of the movable armature.
- the hole in the flux distributor does not ensure correct isolation of the magnetic attachment zone from the permanent magnet.
- the tubular cylinder head is produced by an expensive bar turning operation.
- the object of the invention is to increase the speed and reliability of a high-sensitivity polarized relay, and to reduce its overall dimensions and the manufacturing cost.
- the relay according to the invention is characterized in that the return spring passes completely through the armature by being inserted between the flow distributor, and the outer end of a guide tube, which passes axially through a passageway of the second cylinder head, being secured to the frame.
- the hole emerging from the armature, and the axial length less than half the overall length of the relay makes it possible to reduce the mass of the armature, which favors the speed of the relay during tripping.
- the permanent magnet and the flow distributor have substantially identical outside diameters, corresponding to the internal diameter of the insulating sheath.
- the shunt flux is then reduced to a minimum, which makes it possible to use a permanent magnet of reduced volume and cost.
- the guide tube is shaped as a neck having an enlarged housing part of the frame, and a narrowed part capable of sliding in the lumen.
- the sheath is provided with a connection base passing through an orifice in the bottom of the first cylinder head for the passage of the connection conductors of the coil.
- the first cylinder head and / or the armature guide tube are produced by a deep drawing operation.
- a high sensitivity electromagnetic relay 10 serves as a triggering member for a mechanism of an electric circuit breaker.
- the relay 10 comprises a fixed magnetic circuit 12, and a movable armature 14 mounted for axial sliding in the direction of the longitudinal axis XX ′ between a position of attraction (half view from the right) and a tripping position half view from the left).
- the magnetic circuit 12 is made of ferromagnetic material, and comprises a first tubular yoke 16 closed at one end by a bottom 18 extending perpendicular to the longitudinal axis XX ′.
- the cylinder head 16 and the bottom 18 constitute the same part obtained by a deep drawing operation.
- a second yoke 20 is attached to the open end of the first yoke 16 to close the magnetic circuit 12.
- the two yokes 16,20 are assembled either by direct crimping or by by means of an additional cover 22 covering the first cylinder head 16, and having a front edge 24 capable of being folded over an annular shoulder 26 of the second cylinder head 20.
- the cover 22 is made of a magnetic or non-magnetic material, and has a thickness less than that of the first cylinder head 16.
- the magnetic circuit 12 is polarized by a magnet 28 with axial magnetization bearing on the bottom 18 inside the first yoke 16.
- a flow distributor 30 is superimposed on the magnet 28, and cooperates directly with the pole surface 32 of the movable armature 14 through an axial air gap 33.
- the magnet 28 and the flow distributor 30 have cylindrical shapes having substantially the same diameter.
- the second cylinder head 20 is equipped with an internal tubular sleeve 34 made of ferromagnetic material partially extending in an annular space formed coaxially between the movable frame 14 and an insulating sheath 36 serving to support a cylindrical control coil 38.
- the opposite end faces of the cylindrical sheath 36 are arranged between the bottom 18 and the second cylinder head 20 and one of them has a connection base 40 passing through an orifice 42 in the bottom 18 for the passage of the coil connection conductors 38 .
- the coil 38 is mounted coaxially on the insulating sheath 36, the internal lateral wall of which has an annular protuberance 44 disposed axially between the free end of the sleeve 34 and the base 40.
- the role of the protuberance 44 consists in wedging the distributor flux 30 against the magnet 28.
- the central part of the flux distributor 30 is provided with a centering cleat 46, on which is threaded a return spring 48 urging the movable armature 14 towards the trigger position during the coil excitation 38.
- the frame 14 is fixed inside the enlarged part of a neck-shaped guide tube 50, the end of the narrow part of which axially passes through a circular passageway 52 formed in a bearing 54 of the second cylinder head 20.
- the spring 48 passes completely through the frame 14, bearing on the flow distributor 30 and the end of the guide tube 50.
- the guide tube 50 is advantageously produced by a deep drawing operation of a non-magnetic or insulating material having a low coefficient of friction.
- the frame 14 is fixed in the tube 50 by gluing or crimping.
- the end of the tube 50 is capped by a cap 56 arranged as an external trigger button.
- the axial length of the movable armature 14 is less than half the overall length of the relay 10 corresponding to the distance between the external faces of the bottom 18 and of the second cylinder head 20.
- the mass of the movable assembly is thus reduced as a minimum allowing the speed of relay 10 to be increased.
- the operation of the polarized relay 10 is similar to that described in the document EP-A-187055. Since the flux distributor 30 and the permanent magnet 28 have substantially identical external diameters, corresponding to the clearance close to the internal diameter of the sheath 36, the shunt flow Os which loops directly between the permanent magnet 28 and the first yoke 16 is very small. This results in a minimum overall size of the permanent magnet 28 formed in particular by a simple washer made of a rare earth material with very high coercivity. The operation of the relay 10 takes place by means of two predominant opposite fluxes, comprising the first magnetic polarization flux Or of the permanent magnet 28, and the second magnetic control flux Oc of the coil 38.
- the coil 38 is not excited and the armature 14 is held in the position of attraction against the flux distributor 30 by the action of the first polarization flux Ou.
- the second opposite control flow Oc only appears when the coil 38 is energized by the trigger signal. As soon as the return force of the spring 48 becomes greater than the magnetic attraction force, the armature 14 and the guide tube 50 are propelled towards the release position (half view from the left).
Description
L'invention est relative à un relais électromagnétique polarisé à accrochage magnétique, comprenant un circuit magnétique fixe formé par l'assemblage d'une première et d'une deuxième culasses délimitant un espace interne renfermant :
- un aimant permanent en appui contre le fond de la première culasse, et destiné à créer un premier flux magnétique de polarisation,
- un répartiteur de flux en contact avec la face opposée de l'aimant permanent,
- une armature mobile montée à coulissement axial selon la direction de l'axe longitudinal entre une position d'attraction, et une position de déclenchement, et ayant une surface polaire coopérant avec le répartiteur de flux au moyen d'un entrefer axial,
- une bobine cylindrique montée sur un fourreau isolant entourant coaxialement l'armature, et destinée à engendrer un deuxième flux magnétique de commande opposé au premier flux de polarisation,
- un ressort de rappel sollicitant l'armature vers la position de déclenchement lors de l'excitation de la bobine,
- et un poussoir extérieur de déclenchement solidaire de l'armature mobile,
- a permanent magnet resting against the bottom of the first cylinder head, and intended to create a first magnetic polarization flux,
- a flow distributor in contact with the opposite face of the permanent magnet,
- a movable armature mounted to slide axially in the direction of the longitudinal axis between an attraction position and a release position, and having a pole surface cooperating with the flow distributor by means of an axial air gap,
- a cylindrical coil mounted on an insulating sheath coaxially surrounding the armature, and intended to generate a second magnetic control flux opposite to the first polarization flux,
- a return spring urging the armature towards the triggering position when the coil is excited,
- and an external trigger pushbutton secured to the movable frame,
Un tel relais est décrit dans le document EP-A- 187055. Le répartiteur de flux et l'aimant permanent sont annulaires pour autoriser le passage du ressort de rappel qui prend appui sur le fond du circuit magnétique. L'autre extrémité du ressort est logée dans un orifice borgne de l'armature. Le logement du ressort à l'intérieur d'un orifice borgne du circuit magnétique augmente l'encombrement en longueur du relais, et la masse de l'armature mobile. Le trou dans le répartiteur de flux n'assure pas un isolement correct de la zone d'accrochage magnétique par rapport à l'aimant permanent. La culasse tubulaire est réalisée par une opération onéreuse de décolletage.Such a relay is described in document EP-A-187055. The flux distributor and the permanent magnet are annular to allow the passage of the return spring which bears on the bottom of the magnetic circuit. The other end of the spring is housed in a blind hole in the frame. The spring housing inside a blind hole in the magnetic circuit increases the overall dimensions of the relay, and the mass of the movable armature. The hole in the flux distributor does not ensure correct isolation of the magnetic attachment zone from the permanent magnet. The tubular cylinder head is produced by an expensive bar turning operation.
L'objet de l'invention consiste à augmenter la rapidité et la fiabilité d'un relais polarisé à haute sensibilité, et à en réduire l'encombrement en longueur et le coût de fabrication.The object of the invention is to increase the speed and reliability of a high-sensitivity polarized relay, and to reduce its overall dimensions and the manufacturing cost.
Le relais selon l'invention est caractérisé en ce que le ressort de rappel traverse totalement l'armature en étant inséré entre le répartiteur de flux, et le bout extérieur d'un tube de guidage, lequel traverse axialement une lumière de passage de la deuxième culasse, en étant solidarisé à l'armature.The relay according to the invention is characterized in that the return spring passes completely through the armature by being inserted between the flow distributor, and the outer end of a guide tube, which passes axially through a passageway of the second cylinder head, being secured to the frame.
Le trou débouchant de l'armature, et la longueur axiale inférieure à la moitié de la longueur hors tout du relais permet de réduire la masse de l'armature, ce qui favorise la rapidité du relais lors du déclenchement.The hole emerging from the armature, and the axial length less than half the overall length of the relay makes it possible to reduce the mass of the armature, which favors the speed of the relay during tripping.
L'aimant permanent et le répartiteur de flux présentent des diamètres extérieurs sensiblement identiques, correspondant au diamètre interne du fourreau isolant.The permanent magnet and the flow distributor have substantially identical outside diameters, corresponding to the internal diameter of the insulating sheath.
Le flux shunt est alors réduit au minimum, ce qui permet d'utiliser un aimant permanent de volume et de coût réduits.The shunt flux is then reduced to a minimum, which makes it possible to use a permanent magnet of reduced volume and cost.
Le tube de guidage est conformé en goulot ayant une partie élargie de logement de l'armature, et une partie rétrécie susceptible de coulisser dans la lumière.The guide tube is shaped as a neck having an enlarged housing part of the frame, and a narrowed part capable of sliding in the lumen.
Le fourreau est doté d'une embase de raccordement traversant un orifice du fond de la première culasse pour le passage des conducteurs de liaison de la bobine.The sheath is provided with a connection base passing through an orifice in the bottom of the first cylinder head for the passage of the connection conductors of the coil.
La première culasse et/ou le tube de guidage de l'armature sont réalisés par une opération d'emboutissage profond.The first cylinder head and / or the armature guide tube are produced by a deep drawing operation.
D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un exemple de réalisation de l'invention, donné à titre d'exemple et représenté en coupe au dessin annexé, dont les demi-vues de gauche et de droite montrent respectivement le relais en position de déclenchement, et en position d'attraction de l'armature mobile.Other advantages and characteristics will emerge more clearly from the description which follows of an exemplary embodiment of the invention, given by way of example and shown in section in the appended drawing, including the left and right half-views. respectively show the relay in the tripping position, and in the position of attraction of the movable armature.
Sur la figure, un relais 10 électromagnétique à haute sensibilité sert d'organe de déclenchement à un mécanisme d'un disjoncteur électrique. Le relais 10 comporte un circuit magnétique 12 fixe, et une armature 14 mobile montée à coulissement axial selon la direction de l'axe XX′ longitudinal entre une position d'attraction (demi-vue de droite) et une position de déclenchement demi-vue de gauche).In the figure, a high sensitivity
Le circuit magnétique 12 est réalisé en matériau ferromagnétique, et comprend une première culasse 16 tubulaire fermée à l'une des extrémités par un fond 18 s'étendant perpendiculairement à l'axe XX′ longitudinal. La culasse 16 et le fond 18 constituent une même pièce obtenue par une opération d'emboutissage profond. A l'opposé du fond 18, une deuxième culasse 20 est rapportée sur l'extrémité ouverte de la première culasse 16 pour fermer le circuit magnétique 12. L'assemblage des deux culasses 16,20 s'effectue soit par sertissage direct, soit au moyen d'un capot 22 additionnel coiffant la première culasse 16, et ayant un bord 24 frontal susceptible d'être rabattu sur un épaulement 26 annulaire de la deuxième culasse 20. Le capot 22 est réalisé en un matériau magnétique ou amagnétique, et présente une épaisseur inférieure à celle de la première culasse 16.The
Le circuit magnétique 12 est polarisé par un aimant 28 à aimantation axiale prenant appui sur le fond 18 à l'intérieur de la première culasse 16. Un répartiteur de flux 30 est superposé à l'aimant 28, et coopère directement avec la surface polaire 32 de l'armature 14 mobile à travers un entrefer axial 33. L'aimant 28 et le répartiteur de flux 30 présentent des formes cylindriques ayant sensiblement le même diamètre.The
La deuxième culasse 20 est équipée d'un manchon 34 interne tubulaire en matériau ferromagnétique s'étendant partiellement dans un espace annulaire ménagé coaxialement entre l'armature 14 mobile et un fourreau 36 isolant servant de support à une bobine 38 cylindrique de commande. Les faces frontales opposées du fourreau 36 cylindrique sont agencées entre le fond 18 et la deuxième culasse 20 et l'une d'elles comporte une embase 40 de raccordement traversant un orifice 42 du fond 18 pour le passage des conducteurs de liaison de la bobine 38.The
La bobine 38 est montée coaxialement sur le fourreau 36 isolant, dont la paroi latérale interne comporte une protubérance 44 annulaire disposée axialement entre l'extrémité libre du manchon 34 et l'embase 40. Le rôle de la protubérance 44 consiste à caler le répartiteur de flux 30 contre l'aimant 28. La partie centrale du répartiteur de flux 30 est dotée d'un taquet 46 de centrage, sur lequel est enfilé un ressort 48 de rappel sollicitant l'armature 14 mobile vers la position de déclenchement lors de l'excitation de la bobine 38.The
L'armature 14 est fixée à l'intérieur de la partie élargie d'un tube 50 de guidage en forme de goulot, dont le bout de la partie étroite traverse axialement une lumière 52 circulaire de passage ménagée dans un palier 54 de la deuxième culasse 20. Le ressort 48 traverse totalement l'armature 14 en prenant appui sur le répartiteur de flux 30 et le bout du tube 50 de guidage.The frame 14 is fixed inside the enlarged part of a neck-
Le tube 50 de guidage est avantageusement réalisé par une opération d'emboutissage profond d'un matériau amagnétique ou isolant ayant un faible coefficient de frottement. La fixation de l'armature 14 dans le tube 50 s'effectue par collage ou par sertissage. Le bout du tube 50 est coiffé par un capuchon 56 agencé en poussoir externe de déclenchement.The
La longueur axiale de l'armature 14 mobile est inférieure à la moitié de la longueur hors tout du relais 10 correspondant à la distance entre les faces externes du fond 18 et de la deuxième culasse 20. La masse de l'équipage mobile est ainsi réduite au minimum permettant d'augmenter la rapidité du relais 10.The axial length of the movable armature 14 is less than half the overall length of the
Le fonctionnement du relais 10 polarisé est similaire à celui décrit dans le document EP-A-187055. Etant donné que le répartiteur de flux 30 et l'aimant permanent 28 présentent des diamètres extérieurs sensiblement identiques, correspondant au jeu près au diamètre interne du fourreau 36 le flux shunt Os qui se reboucle directement entre l'aimant 28 permanent et la première culasse 16 est très réduit. Il en résulte un encombrement minimum de l'aimant 28 permanent formé notamment par une simple rondelle en matériau à base de terres rares à très forte coercivité. Le fonctionnement du relais 10 s'opère au moyen de deux flux opposés prépondérants, comprenant le premier flux magnétique de polarisation Ou de l'aimant permanent 28, et le deuxième flux magnétique de commande Oc de la bobine 38.The operation of the polarized
Sur la demi-vue de droite, la bobine 38 n'est pas excitée et l'armature 14 est maintenue en position d'attraction contre le répartiteur de flux 30 par l'action du premier flux de polarisation Ou.In the right half-view, the
Le deuxième flux opposé de commande Oc apparaît seulement lors de l'excitation de la bobine 38 par le signal de déclenchement. Dès que la force de rappel du ressort 48 devient supérieure à la force d'attraction magnétique, l'armature 14 et le tube de guidage 50 sont propulsés vers la position de déclenchement (demi-vue de gauche).The second opposite control flow Oc only appears when the
On remarque que le ressort 48 prend simplement appui sur la face supérieure du répartiteur de flux 30. Un tel agencement permet d'isoler l'aimant permanent 28 de la zone d'accrochage magnétique avec l'armature 14.Note that the
Claims (9)
- A polarized electromagnetic relay with magnetic latching, comprising a fixed magnetic circuit (12) formed by assembly of a first and a second yokes (16, 20) bounding an internal space enclosing :- a permanent magnet (28) bearing against the bottom part (18) of the yoke (16), and designed to create a first magnetic polarizing flux Ou,- a flux distributor (30) in contact with the opposite face of the permanent magnet (28),- a moving core (14) mounted with axial sliding in the direction of the longitudinal axis XX′ between an attraction position and a tripping position, and having a polar surface (32) cooperating with the flux distributor (30) by means of an axial air-gap (33),- a cylindrical coil (38) mounted on an insulating sheath (36) surrounding the core (14) coaxially, and designed to generate a second control magnetic flux Oc opposing the first polarizing flux Ou,- a return spring (48) urging the core (14) to the tripping position when the coil (38) is excited,- and an external trip push-button (56) securedly united to the moving core (14), characterized in that the return spring (48) passes completely through the core (14) being inserted between the flux distributor (30) and the external end of a guide tube (50), which passes axially through an aperture (52) of the second yoke (20), being securedly united to the core (14).
- The relay according to claim 1, characterized in that the permanent magnet (28) and flux distributor (30) have appreciably identical external diameters, corresponding to the internal diameter of the insulating sheath (36).
- The relay according to claim 2, characterized in that the internal wall of the sheath (36) comprises an annular protuberance (44) designed to hold the flux distributor (30) against the permanent magnet (28).
- The relay according to claim 1, 2 or 3, characterized in that the guide tube (50) is shaped as a bottle-neck having a widened part housing the core (14) and a narrow part capable of sliding in the aperture (52).
- The relay according to one of the claims 1 to 4, characterized in that the sheath (36) is provided with a connecting base (40) passing through an orifice (42) in the bottom part (18) of the first yoke (16) for the connecting conductors of the coil (38) to pass through.
- The relay according to one of the claims 1 to 5, characterized in that the first yoke (16) and/or the guide tube (50) of the core (14) are achieved by a deep drawing operation.
- The relay according to one of the claims 1 to 6, characterized in that the axial length of the moving core (14) is less than half of the overall length of the relay (10), and that the external diameter of the core (14) is greater than the diameter of the aperture (52).
- The relay according to one of the claims 3 to 7, characterized in that the second yoke (20) comprises a tubular internal sleeve (34) arranged radially between the sheath (36) and the guide tube (50), and extending axially up to the vicinity of the protuberance (44).
- The relay according to one of the claims 1 to 8, characterized in that assembly of the first and second yokes (16, 20) is achieved by crimping by means of an additional metal cover (22) covering the first yoke (16), and having a front edge (24) capable of being folded on an annular shoulder (26) of the second yoke (20).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9000142A FR2656953B1 (en) | 1990-01-05 | 1990-01-05 | ELECTROMAGNETIC RELAY POLARIZED BY A PERMANENT MAGNET. |
FR9000142 | 1990-01-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0436448A1 EP0436448A1 (en) | 1991-07-10 |
EP0436448B1 true EP0436448B1 (en) | 1994-12-07 |
Family
ID=9392584
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90420542A Expired - Lifetime EP0436448B1 (en) | 1990-01-05 | 1990-12-12 | Electromagnetic relay polarised by a permanent magnet |
Country Status (10)
Country | Link |
---|---|
US (1) | US5126710A (en) |
EP (1) | EP0436448B1 (en) |
JP (1) | JPH04212230A (en) |
CA (1) | CA2033522C (en) |
DE (1) | DE69014849T2 (en) |
ES (1) | ES2067714T3 (en) |
FR (1) | FR2656953B1 (en) |
HK (1) | HK1006891A1 (en) |
PT (1) | PT96423B (en) |
ZA (1) | ZA9140B (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9115607U1 (en) * | 1991-12-17 | 1992-02-13 | Abb Patent Gmbh, 6800 Mannheim, De | |
DE4344143B4 (en) * | 1993-12-23 | 2004-04-01 | Moeller Gmbh | Electromagnetic quick release for electrical switching devices |
US5597930A (en) * | 1995-05-18 | 1997-01-28 | Bayer Corporation | Aspartate-functional polyhydantoin prepolymers and their use in coating compositions |
US5596044A (en) * | 1995-05-18 | 1997-01-21 | Bayer Corporation | Hydroxy-functional prepolymers containing hydantoin group precursors and their use in coating compositions |
DE60003229T2 (en) * | 1999-12-15 | 2004-04-22 | First Inertia Switch Ltd., Farnborough | BATTERIEAUSSCHALTER |
DE102009015833B4 (en) * | 2009-04-01 | 2011-04-28 | Hydac Electronic Gmbh | Electromagnetic actuator |
DE102009049009B4 (en) * | 2009-10-09 | 2012-10-04 | Pierburg Gmbh | Actuator for an internal combustion engine |
DE102012213660A1 (en) * | 2012-08-02 | 2014-02-06 | Schaeffler Technologies AG & Co. KG | Magnetic actuator of a sliding cam system |
FR2997546B1 (en) * | 2012-10-26 | 2016-04-01 | Valeo Sys Controle Moteur Sas | LINEAR ELECTROMAGNETIC ACTUATOR |
JP6172065B2 (en) * | 2013-09-19 | 2017-08-02 | アンデン株式会社 | Electromagnetic relay |
CN113299527B (en) * | 2021-07-26 | 2021-11-12 | 广东电网有限责任公司东莞供电局 | Permanent magnet movable type medium-low voltage circuit breaker driving device and method |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3984795A (en) * | 1976-02-09 | 1976-10-05 | I-T-E Imperial Corporation | Magnetic latch construction |
FR2412160A1 (en) * | 1977-12-19 | 1979-07-13 | Alsthom Cgee | Electrical switch actuating striker with electromechanical mechanism - uses excited coil to hold rod against spring in housing of soft steel |
FR2535107A1 (en) * | 1982-10-21 | 1984-04-27 | Alsthom Atlantique | PERCUTOR WITH HIGH SENSITIVITY |
FR2573570B1 (en) * | 1984-11-22 | 1988-05-27 | Merlin Gerin | POLARIZED ELECTROMAGNETIC RELAY WITH MAGNETIC LOCKING FOR A TRIGGER OF AN ELECTRIC CIRCUIT BREAKER |
CA1294305C (en) * | 1987-08-25 | 1992-01-14 | Donald R. Boyd | Tripping coil with flux shifting coil and booster coil |
-
1990
- 1990-01-05 FR FR9000142A patent/FR2656953B1/en not_active Expired - Fee Related
- 1990-12-12 DE DE69014849T patent/DE69014849T2/en not_active Expired - Fee Related
- 1990-12-12 EP EP90420542A patent/EP0436448B1/en not_active Expired - Lifetime
- 1990-12-12 ES ES90420542T patent/ES2067714T3/en not_active Expired - Lifetime
- 1990-12-19 US US07/630,209 patent/US5126710A/en not_active Expired - Fee Related
-
1991
- 1991-01-02 CA CA002033522A patent/CA2033522C/en not_active Expired - Fee Related
- 1991-01-03 ZA ZA9140A patent/ZA9140B/en unknown
- 1991-01-04 PT PT96423A patent/PT96423B/en not_active IP Right Cessation
- 1991-01-04 JP JP3010320A patent/JPH04212230A/en active Pending
-
1998
- 1998-06-22 HK HK98105885A patent/HK1006891A1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
PT96423A (en) | 1992-09-30 |
HK1006891A1 (en) | 1999-03-19 |
ZA9140B (en) | 1991-10-30 |
EP0436448A1 (en) | 1991-07-10 |
CA2033522A1 (en) | 1991-07-06 |
JPH04212230A (en) | 1992-08-03 |
FR2656953B1 (en) | 1996-08-30 |
ES2067714T3 (en) | 1995-04-01 |
PT96423B (en) | 1998-06-30 |
DE69014849D1 (en) | 1995-01-19 |
FR2656953A1 (en) | 1991-07-12 |
CA2033522C (en) | 2000-08-08 |
US5126710A (en) | 1992-06-30 |
DE69014849T2 (en) | 1995-06-08 |
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