EP0150756B1 - Control device for electric circuit breaker - Google Patents

Control device for electric circuit breaker Download PDF

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Publication number
EP0150756B1
EP0150756B1 EP85100341A EP85100341A EP0150756B1 EP 0150756 B1 EP0150756 B1 EP 0150756B1 EP 85100341 A EP85100341 A EP 85100341A EP 85100341 A EP85100341 A EP 85100341A EP 0150756 B1 EP0150756 B1 EP 0150756B1
Authority
EP
European Patent Office
Prior art keywords
cam
sector
motor
closing spring
control device
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
Application number
EP85100341A
Other languages
German (de)
French (fr)
Other versions
EP0150756A3 (en
EP0150756A2 (en
Inventor
Pierre Baginski
Jean-Pierre Nebon
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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 Merlin Gerin SA filed Critical Merlin Gerin SA
Priority to AT85100341T priority Critical patent/ATE34484T1/en
Publication of EP0150756A2 publication Critical patent/EP0150756A2/en
Publication of EP0150756A3 publication Critical patent/EP0150756A3/en
Application granted granted Critical
Publication of EP0150756B1 publication Critical patent/EP0150756B1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H2003/3063—Decoupling charging handle or motor at end of charging cycle or during charged condition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3005—Charging means
    • H01H3/3015—Charging means using cam devices
    • 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
    • H01H3/40—Driving mechanisms, i.e. for transmitting driving force to the contacts using friction, toothed, or screw-and-nut gearing

Definitions

  • the invention relates to a device for controlling an electrical circuit breaker having a pair of contacts and an opening spring mechanism for moving the movable contact to the open position and a closing spring to move the movable contact to the position closing, the opening spring being armed during the closing maneuver and the closing spring arming being carried out by a cam driven in rotation by a motor, said reset cam cooperating with a mechanically connected roller on the one hand to the closing spring and on the other hand to the movable contact, the advantage of the cam having three successive sectors, a first sector of movement of the roller by rotation of the cam to arm the closing spring, a second sector lasting which the action of the closing spring on the cam via the roller tends to continue the rotation of the cam and a third sector for releasing the roller for an abrupt maneuver of f ermeture of the contacts by the closing spring, a catch being able to lock the cam in the active position of said second sector.
  • a control device of the kind mentioned allows sudden closing of a single-pole or multi-pole circuit breaker by simply releasing the latching, the spring ensuring the sudden closing.
  • the closing spring is reset, either manually or by an electric motor as soon as the circuit breaker closes, in order to be ready for a new operation in the event of the circuit breaker opening.
  • Such devices are suitable for very high intensity low voltage circuit breakers which require significant operating forces which are difficult to control with a simple handle or a control lever.
  • the electrical reset command is integrated into the circuit breaker mechanism and limits the possibilities of use of the latter.
  • Document EP-A-0 062 414 describes another type of device for controlling an electric circuit breaker, in which the arming of a closing spring is effected by a cam which can be driven by a motor. The engine is stopped by detecting the position of an indicator linked to the cam so as to stop the cam just before it reaches a position in which it is rotated by the closing spring.
  • Document DE-A-2 201 938 describes a device for controlling a switch comprising a cam having the sole function of resetting the opening and closing springs, under the control of a motor, immediately after the opening of the contacts.
  • Locking devices act on transmission levers and are unlocked by actuation of push buttons.
  • the present invention aims to allow the realization of a modular system.
  • the control device is characterized in that it comprises a means for detecting the rotation of the cam from the active position of the second sector to the active position of the third sector, said detection means triggering a reset operation. of the closing spring by rotation of the cam by said motor.
  • the cam ensures, in addition to its functions of arming the spring and of reduction of the unlocking force, the function of triggering a maneuver for resetting the closing spring.
  • This allows a simplification of the device and essentially a grouping of all the elements of the electrical arming control in a sub-assembly which can be easily coupled and without risk of error to a circuit breaker mechanism.
  • the advantages of reducing the cost of manufacturing and storing modular systems are known, and the present invention allows the realization of a fully prewired electrical arming command requiring, during its adaptation, only one point of mechanical connection with the circuit breaker mechanism.
  • the detection means controlling the rearming of the closing spring ensures at the same time the stopping of the motor and / or the disengagement of the latter at the end of the arming stroke of the spring.
  • the subassembly constituting the electrical arming command comprises an output shaft capable of being coupled to a shaft of the circuit breaker mechanism and more particularly to the shaft carrying the reset cam.
  • the coupling between the two shafts must avoid any angular offset and allow coupling only for a well defined relative position of the two shafts. This coupling transmits on the one hand the rotational driving force of the cam for arming the closing spring and on the other hand a cam position signal triggering the resetting operation by starting the electric motor of the command.
  • the framework of an electrical control sub-assembly 10 consists of two flanges 12, 14, between which is mounted a reduction gear train 18 driven in rotation by a pinion 20 of an electric motor 16
  • the output of the gear train 18 comprises a differential mechanism 22 having a first sun gear 24 rotated by the last toothed wheel 26 of the train 18 and a second sun gear 28 in the form of a crown with internal teeth.
  • a differential mechanism 22 having a first sun gear 24 rotated by the last toothed wheel 26 of the train 18 and a second sun gear 28 in the form of a crown with internal teeth.
  • satellites 30 carried by a planet carrier plate 32, mounted idly on the output shaft 34 carrying the last toothed wheel 26.
  • the planetary crown 28 carries a coupling bush 36 constituting the output of the gearmotor sub-assembly 10.
  • the planet carrier plate 32 has on its outer circumference locking teeth 38 capable of cooperating with a pawl 40 rotatably mounted on an axis 42 and biased by a spiral spring 44 in the locking position of the carrier plate satallites 32.
  • the planetary ring 28 carries on its outer periphery a finger 46 capable of actuating a lever 48 secured to the pawl 40.
  • the lever 48 has a boss 52 capable of actuating the lever 54 of a microswitch 50 inserted in the motor supply circuit 16.
  • the geared motor sub-assembly 10 is capable of being coupled by engagement of the sleeve 36 on one end 56 of a shaft 58 to a mechanism 60 of which only the end part is represented.
  • the mechanism 60 comprises a reset cam 62 keyed to the shaft 58 and it controls the opening and closing of contacts 64, schematically represented in FIGS. 4 and 5.
  • the mechanism 60 is not part of the present invention and does not will not be described in detail, this mechanism possibly being for example of the type described in French patent FR-A-2 357 053 or of a similar type.
  • the contacts 64 are biased in the open position by an opening spring 66 and that the mechanism 60 allows closing control of the contacts 64, for example by a toggle system well known to specialists.
  • the mechanism 60 also includes thermal or magnetic trip devices causing the automatic opening of the contacts 64 in the event of an overload or a fault.
  • the cam 62 cooperates with a roller 68 carried by a lever 70 pivotally mounted on an axis 72.
  • a closing spring 74 urges the lever 70 to bear on the cam 62, the free end of the lever 70 being connected by a system of connecting rods 76 to the actual control of the circuit breaker represented by a simple block 78 in FIGS. 4 and 5.
  • the profile of the cam 62 comprises three successive sectors, a first sector 80 for arming the closing spring 74, the lever 70 being repels when the cam 62 rotates clockwise, so as to move away from the shaft 58 by compressing the spring 74.
  • the second sector 82 of very limited length initiates a reverse pivoting of the lever 70 under the action of the closing spring 74.
  • the third sector 84 corresponds to a release of the roller 68 allowing an abrupt pivoting of the lever 70 in the anticlockwise direction under the action of the closing spring 74.
  • Arming cam 62 carries a C igt 86 capable of coming into abutment with a lock 88, in the active position of the second sector 82, shown in FIG. 4.
  • the closing spring 74 makes pivot the lever 70 anticlockwise and transmits a closing force to the control 78 moving the contacts 64 in the closed position against the force of the opening spring 66, which is automatically armed by this closing maneuver.
  • To reset the closing spring 74 it suffices to rotate the shaft 58, for example by the gearmotor 10, clockwise, until the second sector 82 comes into active position. the passage from the first sector 80 to the second sector 82 the roller 68 initiates a movement in the opposite direction by exerting on the cam 62 a force participating in its training in the clockwise direction.
  • the cam 62 automatically continues its rotation until the finger 86 comes into abutment on the latch 88, the drive force of the shaft 58 being able to be interrupted during this movement of the roller along the second sector 82. It should be noted that the cam 62 always rotates in the same direction and occupies two stable positions, an armed position, shown in FIG. 4, in which the cam is locked by latch 88, and a disarmed position, represented by FIG. 5. Such a mechanism is well known to specialists and it will suffice for the reader to refer to French patent FR-A-2,376,509 to have more details on an embodiment and its operation.
  • the rotation of the shaft 58 can be controlled by a manual handle 90 shown diagrammatically in FIG. 3.
  • This handle 90 is mounted idly on the shaft 58 and cooperates by a system of drive and retaining pawls 92 with a wheel toothed 94 keyed onto the shaft 58.
  • An alternating tilting of the handle 90 causes an intermittent drive in the same direction of the shaft 58, the ratchet system 92 authorizing a rotation of the shaft 58 in the same direction, independently of the handle 90.
  • Such drive systems are well known.
  • the closing spring 74 can also be reset by the gearmotor 10 coupled to the shaft 58.
  • the conjugate sections of the end 56 of the shaft 58 and of the coupling sleeve 36 has a flat 96 perfectly defining the position of the shaft 58 relative to the socket 36. It follows that the sub-assembly 10 can only be coupled to the mechanism 60 for a unique and perfectly defined positioning of the socket 36 relative to the shaft 58.
  • control device according to the invention is described below more particularly with reference to FIG. 6, which represents only the essential parts necessary for understanding the description.
  • the passage of the roller 68 from the first sector 80 to the second sector 82 corresponds to the arrival of the finger 46 in contact with the lever 48.
  • the assembly is arranged in such a way that the disengagement caused by the release of the pawl 40 occurs just after the passage of the roller 68 over the second sector 82, this disengagement stopping the rotation drive of the shaft 58 and of the cam 62 by the engine 16.
  • L the cam 62 continues its stroke under the action of the closing spring 74 until the abutment on the latch 88.
  • the sun gear 28 disengaged from the motor 16 accompanies the cam 62 in its limited stroke, the finger 46 being arranged to maintain the lever 48 in the pivoted position during this entire limited stroke.
  • the contact 50 is open to interrupt the supply of the motor 16. This opening of the contact 50 occurs in all cases before the cam 62 comes into abutment on the lock 88. It is thus ensured that in the cocking position, shown in FIG. 6, the motor 16 is stopped and disengaged, the cam 62 being in a position ready for an engagement maneuver.
  • the order to start the gearmotor 10 after an engagement maneuver is transmitted by the connecting shaft 58 and there is no need to provide an additional connection or link for this start-up command.
  • the connection by flat 96 avoids any offset between the cam 62 and the sun gear 28 ensuring perfect synchronization of the displacements and of the successive commands.
  • the installation of the gearmotor sub-assembly on the circuit breaker does not require any complicated operation since it boils down to a fitting of the socket 36 on the end 56 and this installation can be carried out by the user or the distributor.
  • the profit of the second sector 82 of the cam 62 limits the forces exerted on the latch 88 as well as the number of hookings of the control.
  • the invention is of course in no way limited to the mode of implementation more particularly described and it extends in particular to a control in which the declutching would be carried out by different means, or that again using different coupling means.

Abstract

The electric control to reset a circuit breaker is formed by a sub-assembly (10) to be coupled to the mechanism (60) of the circuit breaker. At the end of the charging travel of the closing spring a control cam (46) disconnects and stops the motor. The charging position is defined by a latch interlocking the charging cam (62), a closing operation being induced by the release of the latch and a limited rotation of this charging cam (62). The link shaft between the motor reducing sub-assembly or block (10) and the mechanism (60) transmits this closing limited rotation to the control cam (46), which induces the restarting and the connecting of the motor for a reset operation of the closing spring.

Description

L'invention est relative à un dispositif de commande d'un disjoncteur électrique ayant une paire de contacts et un mécanisme à ressort d'ouverture pour déplacer le contact mobile en position d'ouverture et à ressort de fermeture pour déplacer le contact mobile en position de fermeture, l'armement du ressort d'ouverture s'effectuant lors de la manoeuvre de fermeture et l'armement du ressort de fermeture étant effectué par une came entraînée en rotation par un moteur, ladite came de réarmement coopérant avec un galet relié mécaniquement d'une part au ressort de fermeture et d'autre part au contact mobile, le profit de la came présentant trois secteurs successifs, un premier secteur de déplacement du galet par rotation de la came pour armer le ressort de fermeture, un deuxième secteur durant lequel l'action du ressort de fermeture sur la came par l'intermédiaire du galet tend à poursuivre la rotation de la came et un troisième secteur de libération du galet pour une manoeuvre brusque de fermeture des contacts par le ressort de fermeture, un accrochage étant susceptible de verrouiller la came dans la position active dudit deuxième secteur.The invention relates to a device for controlling an electrical circuit breaker having a pair of contacts and an opening spring mechanism for moving the movable contact to the open position and a closing spring to move the movable contact to the position closing, the opening spring being armed during the closing maneuver and the closing spring arming being carried out by a cam driven in rotation by a motor, said reset cam cooperating with a mechanically connected roller on the one hand to the closing spring and on the other hand to the movable contact, the advantage of the cam having three successive sectors, a first sector of movement of the roller by rotation of the cam to arm the closing spring, a second sector lasting which the action of the closing spring on the cam via the roller tends to continue the rotation of the cam and a third sector for releasing the roller for an abrupt maneuver of f ermeture of the contacts by the closing spring, a catch being able to lock the cam in the active position of said second sector.

Un dispositif de commande du genre mentionné permet une fermeture brusque d'un disjoncteur unipolaire ou multipolaire par la simple libération de l'accrochage, le ressort assurant la fermeture brusque. Le réarmement du ressort de fermeture intervient, soit manuellement, soit par un moteur électrique dès la fermeture du disjoncteur afin d'être prêt pour une nouvelle manoeuvre en cas d'ouverture du disjoncteur. De tels dispositifs sont adaptés à des disjoncteurs basse tension de très forte intensité qui nécessitent des forces de manoeuvre importantes difficilement maîtrisables par une simple poignée ou une manette de commande. Dans ce dispositif connu, la commande électrique de réarmement est intégrée au mécanisme du disjoncteur et limite les possibilités d'emploi de ce dernier.A control device of the kind mentioned allows sudden closing of a single-pole or multi-pole circuit breaker by simply releasing the latching, the spring ensuring the sudden closing. The closing spring is reset, either manually or by an electric motor as soon as the circuit breaker closes, in order to be ready for a new operation in the event of the circuit breaker opening. Such devices are suitable for very high intensity low voltage circuit breakers which require significant operating forces which are difficult to control with a simple handle or a control lever. In this known device, the electrical reset command is integrated into the circuit breaker mechanism and limits the possibilities of use of the latter.

Le document EP-A-0 062 414 décrit un autre type de dispositif de commande d'un disjoncteur électrique, dans lequel l'armement d'un ressort de fermeture est effectué par une came qui peut être entraînée par un moteur. L'arrêt du moteur est commandé par la détection de la position d'un indicateur lié à la came de manière à arrêter la came juste avant qu'elle n'atteigne une position dans laquelle elle est entraînée en rotation par le ressort de fermeture.Document EP-A-0 062 414 describes another type of device for controlling an electric circuit breaker, in which the arming of a closing spring is effected by a cam which can be driven by a motor. The engine is stopped by detecting the position of an indicator linked to the cam so as to stop the cam just before it reaches a position in which it is rotated by the closing spring.

Le document DE-A-2 201 938 décrit un dispositif de commande d'un interrupteur comportant une came ayant pour seule fonction le réarmement des ressorts d'ouverture et de fermeture, sous la commande d'un moteur, immédiatement après l'ouverture des contacts.Document DE-A-2 201 938 describes a device for controlling a switch comprising a cam having the sole function of resetting the opening and closing springs, under the control of a motor, immediately after the opening of the contacts.

Des dispositifs de verrouillage agissent sur des leviers de transmission et sont déverrouillés par l'actionnement de boutons poussoirs.Locking devices act on transmission levers and are unlocked by actuation of push buttons.

La présente invention a pour but de permettre la réalisation d'un système modulaire.The present invention aims to allow the realization of a modular system.

Le dispositif de commande selon l'invention est caractérisé en ce qu'il comporte un moyen de détection de la rotation de la came de la position active du deuxième secteur vers la position active du troisième secteur, ledit moyen de détection déclenchant une opération de réarmement du ressort de fermeture par rotation de la came par ledit moteur.The control device according to the invention is characterized in that it comprises a means for detecting the rotation of the cam from the active position of the second sector to the active position of the third sector, said detection means triggering a reset operation. of the closing spring by rotation of the cam by said motor.

La came assure, en plus de ses fonctions d'armement du ressort et de démultiplication de l'effort de déverrouillage, la fonction de déclenchement d'une manoeuvre de réarmement du ressort de fermeture. Ceci permet une simplification du dispositif et essentiellement un groupement de tous les éléments de la commande électrique d'armement dans un sous-ensemble pouvant être accouplé facilement et sans risque d'erreur à un mécanisme de disjoncteur. On connaît les avantages de réduction du coût de fabrication et de stockage des systèmes modulaires, et la présente invention permet la réalisation d'une commande d'armement électrique entièrement précâblée ne nécessitant lors de son adaptation qu'un seul point de liaison mécanique avec le mécanisme du disjoncteur.The cam ensures, in addition to its functions of arming the spring and of reduction of the unlocking force, the function of triggering a maneuver for resetting the closing spring. This allows a simplification of the device and essentially a grouping of all the elements of the electrical arming control in a sub-assembly which can be easily coupled and without risk of error to a circuit breaker mechanism. The advantages of reducing the cost of manufacturing and storing modular systems are known, and the present invention allows the realization of a fully prewired electrical arming command requiring, during its adaptation, only one point of mechanical connection with the circuit breaker mechanism.

Selon un développement de l'invention, le moyen de détection commandant le réarmement du ressort de fermeture assure en même temps l'arrêt du moteur et/ou le débrayage de ce dernier en fin de course d'armement du ressort. Le sous-ensemble constituant la commande électrique d'armement comporte un arbre de sortie susceptible d'être accouplé à un arbre du mécanisme du disjoncteur et plus particulièrement à l'arbre portant la came de réarmement. L'accouplement entre les deux arbres doit éviter tout décalage angulaire et autoriser un accouplement que pour une position relative bien definie des deux arbres. Cet accouplement transmet d'une part la force d'entraînement en rotation de la came pour l'armement du ressort de fermeture et d'autre part un signal de position de la came déclenchant la manoeuvre de réarmement par mise en route du moteur électrique de la commande.According to a development of the invention, the detection means controlling the rearming of the closing spring ensures at the same time the stopping of the motor and / or the disengagement of the latter at the end of the arming stroke of the spring. The subassembly constituting the electrical arming command comprises an output shaft capable of being coupled to a shaft of the circuit breaker mechanism and more particularly to the shaft carrying the reset cam. The coupling between the two shafts must avoid any angular offset and allow coupling only for a well defined relative position of the two shafts. This coupling transmits on the one hand the rotational driving force of the cam for arming the closing spring and on the other hand a cam position signal triggering the resetting operation by starting the electric motor of the command.

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode de mise en oeuvre de l'invention, donné à titre d'exemple non limitatif et représenté aux dessins annexés, dans lesquels:

  • - la figure 1 est une vue schématique en élévation d'un sous-ensemble d'armement électrique d'un ressort de fermeture d'un dispositif selon l'invention;
  • - la figure 2 est une vue de côté du dispositif selon la figure 1, l'un des flasques latéraux étant supposé enlevé;
  • - la figure 3 est une coupe suivant la ligne Ill-lll de la figure 1, montrant le sous-ensemble en position prêt à être accouplé à un arbre du mécanisme de commande d'un disjoncteur;
  • - les figures 4 et 5 illustrent schématiquement une partie du mécanisme du disjoncteur représenté respectivement en fin de course d'armement du ressort de fermeture et en position de désarmement de ce ressort;
  • - la figure 6 représente les positions respectives de la came et des moyens de commande du moteur électrique de réarmement.
Other advantages and characteristics will emerge more clearly from the description which follows of an embodiment of the invention, given by way of nonlimiting example and represented in the appended drawings, in which:
  • - Figure 1 is a schematic elevational view of an electric arming sub-assembly of a closing spring of a device according to the invention;
  • - Figure 2 is a side view of the device according to Figure 1, one of the side plates being assumed removed;
  • - Figure 3 is a section along the line III-III of Figure 1, showing the sub-assembly in position ready to be coupled to a shaft of the control mechanism of a circuit breaker;
  • - Figures 4 and 5 schematically illustrate a part of the circuit breaker mechanism shown respectively at the end of the arming travel of the closing spring and in the disarming position of this spring;
  • - Figure 6 shows the respective positions of the cam and the control means of the rearming electric motor.

Sur les figures, l'ossature d'un sous-ensemble 10 de commande électrique est constituée de deux flasques 12, 14, entre lesquels est monté un train d'engrenage réducteur 18 entraîné en rotation par un pignon 20 d'un moteur électrique 16. La sortie du train d'engrenage 18 comporte un mécanisme différentiel 22 ayant un premier planétaire 24 entraîné en rotation par la dernière roue dentée 26 du train 18 et un deuxième planétaire 28 en forme de couronne à denture interne. Entre les planétaires 24, 28 sont intercalés des satellites 30 portés par un plateau porte satellites 32, monté fou sur l'arbre de sortie 34 portant la dernière roue dentée 26. La couronne planétaire 28 porte une douille d'accouplement 36 constituant la sortie du sous-ensemble motoréducteur 10. Le plateau porte satellites 32 présente sur sa circonférence externe des dents de verrouillage 38 susceptibles de coopérer avec un cliquet 40 monté à rotation sur un axe 42 et sollicité par un ressort spirale 44 en position de verrouillage du plateau porte- satallites 32. La couronne planétaire 28 porte sur son pourtour externe un doigt 46 susceptible d'actionner un levier 48 solidaire du cliquet 40. Le levier 48 présente un bossage 52 susceptible d'actionner le levier 54 d'un micro-contact 50 inséré dans le circuit d'alimentation du moteur 16.In the figures, the framework of an electrical control sub-assembly 10 consists of two flanges 12, 14, between which is mounted a reduction gear train 18 driven in rotation by a pinion 20 of an electric motor 16 The output of the gear train 18 comprises a differential mechanism 22 having a first sun gear 24 rotated by the last toothed wheel 26 of the train 18 and a second sun gear 28 in the form of a crown with internal teeth. Between the planets 24, 28 are inserted satellites 30 carried by a planet carrier plate 32, mounted idly on the output shaft 34 carrying the last toothed wheel 26. The planetary crown 28 carries a coupling bush 36 constituting the output of the gearmotor sub-assembly 10. The planet carrier plate 32 has on its outer circumference locking teeth 38 capable of cooperating with a pawl 40 rotatably mounted on an axis 42 and biased by a spiral spring 44 in the locking position of the carrier plate satallites 32. The planetary ring 28 carries on its outer periphery a finger 46 capable of actuating a lever 48 secured to the pawl 40. The lever 48 has a boss 52 capable of actuating the lever 54 of a microswitch 50 inserted in the motor supply circuit 16.

En position verrouillée du plateau porte-satellites 32 par le cliquet 40, le contacts électrique 50 est fermé et le moteur électrique 16 entraîne en rotation par le train reducteur 16 et le mécanisme différentiel 22 la douille d'accouplement 36. Au cours de la rotation de la couronne planétaire 28 (non représentée sur la fig. 2), le doigt 46 engage le levier 48 en le faisant pivoter autour de l'axe 42. Ce pivotement du levier 48 provoque d'une part l'ouverture du contact 50 interrompant l'alimentation électrique du moteur 16, et d'autre part le dégagement du cliquet 40 qui libère le plateau porte-satellites 32. Dès la libération du plateau porte-satellites 32 ce dernier peut tourner librement et la transmission entre les planétaires 24 et 28 est interrompue. Ce débrayage arrête instantanement l'entraînement en rotation de la douille 36, le moteur 16 pouvant poursuivre sa rotation jusqu'à son arrêt normal. Il est clair que l'arrêt instantané de la douille 36 peut être engendré d'une manière différente, par exemple par un système de frein bloquant automatiquement le moteur 16 dès l'actionnement du levier 48 par le doigt 46. Pour déclencher un nouveau cycle d'entraînement il suffit de tourner le plateau planétaire 28 pour libérer le levier 48 du doigt 46. Le pivotement de l'ensemble levier 48 et cliquet 40 sous l'action du ressort de rappel 44 provoque d'une part la fermeture du contact 50 et la mise en route du moteur 16, et d'autre part le blocage du plateau porte-satellites 32 rétablissant la liaison cinématique entre le moteur 16 et la douille d'accouplement 36. Le sous-ensemble 10 constitue un motoréducteur autonome pouvant être assemblé et précâblé avant son adaptation au mécanisme du disjoncteur.In the locked position of the planet carrier plate 32 by the pawl 40, the electrical contacts 50 are closed and the electric motor 16 rotates by the reduction gear 16 and the differential mechanism 22 the coupling sleeve 36. During the rotation of the planetary ring 28 (not shown in fig. 2), the finger 46 engages the lever 48 by pivoting it around the axis 42. This pivoting of the lever 48 causes on the one hand the opening of the contact 50 interrupting the power supply to the motor 16, and on the other hand the release of the pawl 40 which releases the planet carrier plate 32. As soon as the planet carrier plate 32 is released, the latter can rotate freely and the transmission between the planets 24 and 28 is interrupted. This disengaging instantaneously stops the rotation drive of the sleeve 36, the motor 16 being able to continue its rotation until it stops normally. It is clear that the instantaneous stop of the socket 36 can be generated in a different way, for example by a brake system automatically blocking the motor 16 as soon as the lever 48 is actuated by the finger 46. To trigger a new cycle drive simply turn the planetary plate 28 to release the lever 48 of the finger 46. The pivoting of the lever 48 and pawl assembly 40 under the action of the return spring 44 causes the contact to close 50 and the starting of the motor 16, and on the other hand the blocking of the planet carrier plate 32 restoring the kinematic connection between the motor 16 and the coupling sleeve 36. The sub-assembly 10 constitutes an autonomous gearmotor which can be assembled and pre-wired before adapting to the circuit breaker mechanism.

En se référant plus particulièrement à la figure 3, on voit que le sous-ensemble motoréducteur 10 est susceptible d'être accouplé par engagement de la douille 36 sur une extrémité 56 d'un arbre 58 à un mécanisme 60 dont seule la partie terminale est représentée. Le mécanisme 60 comporte une came de réarmement 62 clavetée sur l'arbre 58 et il commande l'ouverture et la fermeture de contacts 64, schématiquement représentés sur les figures 4 et 5. Le mécanisme 60 ne fait pas partie de la présente invention et ne sera pas décrit en détail, ce mécanisme pouvant être par exemple du type décrit dans le brevet français FR-A-2 357 053 ou d'un type analogue. Il suffit de rappeler que les contacts 64 sont sollicités en position d'ouverture par un ressort d'ouverture 66 et que le mécanisme 60 permet une commande de fermeture des contacts 64, par exemple par un système de genouillère bien connu des spécialistes. Le mécanisme 60 comporte également des déclencheurs thermiques ou magnétiques provoquant l'ouverture automatique des contacts 64 en cas de surcharge ou de défaut. La came 62 coopère avec un galet 68 porté par un levier 70 monté à pivotement sur un axe 72. Un ressort de fermeture 74 sollicite le levier 70 en appui de la came 62, l'extrémité libre du levier 70 étant reliée par un système de bielles 76 à la commande proprement dite du disjoncteur représenté par un simple bloc 78 sur les figures 4 et 5. Le profil de la came 62 comporte trois secteurs successifs, un premier secteur 80 d'armement du ressort de fermeture 74, le levier 70 étant repousse au coups de la rotation de la came 62 dans le sens des aiguilles d'une montre, de manière à s'écarter de l'arbre 58 en comprimant le ressort 74. Le deuxième secteur 82 de longeur très limitée amorce un pivotement inverse du levier 70 sous l'action du ressort de fermeture 74. Le troisième secteur 84 correspond à une libération du galet 68 autorisant un pivotement brusque du levier 70 dans le sens inverse des aiguilles d'une montre sous l'action du ressort de fermeture 74. La came d'armement 62 porte un doigt 86 susceptible de venir en butée d'un verrou 88, en position active du deuxième secteur 82, représentéesur la figure 4. Dans cette position le ressort de fermeture 74 est armé, les contacts 64 étant soit ouverts soit fermes selon l'état de la commande 78. Le galet 68 en appui du deuxième secteur 82 exerce un couple sur la came 62 sollicitant cette dernière en rotation dans le sens des aiguilles d'une montre. Le verrou 88 s'oppose à cette rotation et la position représentée à la figure 4 est une position stable. Après ouverture des contacts 64 par la commande 78, notamment lors d'un défaut, une manoeuvre de fermeture peut être déclenchée par pivotement du verrou 88 libérant le doigt 86. Sous l'action du galet 68 la came 62 pivote dans le sens des aiguilles d'une montre amenant le troisième secteur 84 en position active de libération du galet 68. Le ressort de fermeture 74 fait pivoter le levier 70 dans le sens inverse des aiguilles d'une montre et transmet une force de fermeture à la commande 78 déplaçant les contacts 64 en position de fermeture à l'encontre de la force du ressort d'ouverture 66, qui est automatiquement armé par cette manoeuvre de fermeture. Pour réarmer le ressort de fermeture 74 il suffit d'entraîner en rotation l'arbre 58, par exemple par le motoréducteur 10, dans le sens des aiguilles d'une montre, jusqu'à la venue en position active du deuxième secteur 82. Dès le passage du premier secteur 80 vers le deuxième secteur 82 le galet 68 amorce un déplacement en sens inverse en exerçant sur la came 62 un effort participant à son entraînement dans le sens des aiguilles d'une montre. A partir de ce passage, la came 62 poursuit automatiquement sa rotation jusqu'à la venue en butée du doigt 86 sur le verrou 88, l'effort d'entraînement de l'arbre 58 pouvant être interrompu pendant ce déplacement du galet le long du deuxième secteur 82. Il convient de noter que la came 62 tourne toujours dans le même sens et occupe deux positions stables, une position armée, représentée sur la figure 4, dans laquelle la came est verrouillée par le verrou 88, et une position désarmée, représentée par la figure 5. Un tel mécanisme est bien connu des spécialistes et il suffira au lecteur de se reporter au brevet français FR-A-2 376 509 pour disposer de plus amples détails sur un mode de realisation et son fonctionnement.Referring more particularly to FIG. 3, it can be seen that the geared motor sub-assembly 10 is capable of being coupled by engagement of the sleeve 36 on one end 56 of a shaft 58 to a mechanism 60 of which only the end part is represented. The mechanism 60 comprises a reset cam 62 keyed to the shaft 58 and it controls the opening and closing of contacts 64, schematically represented in FIGS. 4 and 5. The mechanism 60 is not part of the present invention and does not will not be described in detail, this mechanism possibly being for example of the type described in French patent FR-A-2 357 053 or of a similar type. It suffices to recall that the contacts 64 are biased in the open position by an opening spring 66 and that the mechanism 60 allows closing control of the contacts 64, for example by a toggle system well known to specialists. The mechanism 60 also includes thermal or magnetic trip devices causing the automatic opening of the contacts 64 in the event of an overload or a fault. The cam 62 cooperates with a roller 68 carried by a lever 70 pivotally mounted on an axis 72. A closing spring 74 urges the lever 70 to bear on the cam 62, the free end of the lever 70 being connected by a system of connecting rods 76 to the actual control of the circuit breaker represented by a simple block 78 in FIGS. 4 and 5. The profile of the cam 62 comprises three successive sectors, a first sector 80 for arming the closing spring 74, the lever 70 being repels when the cam 62 rotates clockwise, so as to move away from the shaft 58 by compressing the spring 74. The second sector 82 of very limited length initiates a reverse pivoting of the lever 70 under the action of the closing spring 74. The third sector 84 corresponds to a release of the roller 68 allowing an abrupt pivoting of the lever 70 in the anticlockwise direction under the action of the closing spring 74. Arming cam 62 carries a C igt 86 capable of coming into abutment with a lock 88, in the active position of the second sector 82, shown in FIG. 4. In this position the closing spring 74 is armed, the contacts 64 being either open or firm depending on the state of the control 78. The roller 68 in support of the second sector 82 exerts a torque on the cam 62 urging the latter to rotate clockwise. The latch 88 opposes this rotation and the position shown in Figure 4 is a stable position. After opening of the contacts 64 by the control 78, in particular during a fault, a closing maneuver can be triggered by pivoting the lock 88 releasing the finger 86. Under the action of the roller 68 the cam 62 pivots clockwise bringing the third sector 84 into the active release position of the roller 68. The closing spring 74 makes pivot the lever 70 anticlockwise and transmits a closing force to the control 78 moving the contacts 64 in the closed position against the force of the opening spring 66, which is automatically armed by this closing maneuver. To reset the closing spring 74, it suffices to rotate the shaft 58, for example by the gearmotor 10, clockwise, until the second sector 82 comes into active position. the passage from the first sector 80 to the second sector 82 the roller 68 initiates a movement in the opposite direction by exerting on the cam 62 a force participating in its training in the clockwise direction. From this passage, the cam 62 automatically continues its rotation until the finger 86 comes into abutment on the latch 88, the drive force of the shaft 58 being able to be interrupted during this movement of the roller along the second sector 82. It should be noted that the cam 62 always rotates in the same direction and occupies two stable positions, an armed position, shown in FIG. 4, in which the cam is locked by latch 88, and a disarmed position, represented by FIG. 5. Such a mechanism is well known to specialists and it will suffice for the reader to refer to French patent FR-A-2,376,509 to have more details on an embodiment and its operation.

La rotation de l'arbre 58 peut être commandée par une poignée manuelle 90 schématiquement représentée sur la figure 3. Cette poignée 90 est montée folle sur l'arbre 58 et coopère par un système de cliquets d'entraînement et de retenue 92 avec une roue dentée 94 clavetée sur l'arbre 58. Un basculement alternatif de la poignée 90 provoque un entraînement intermittent dans le même sens de l'arbre 58, le système à cliquet 92 autorisant une rotation de l'arbre 58 dans le même sens, indépendamment de la poignée 90. De tels systèmes d'entraînement sont bien connus. Le réarmement du ressort de fermeture 74 peut également être réalise par le motoréducteur 10 accouplé à l'arbre 58. Les sections conjuguées de l'extrémité 56 de l'arbre 58 et de la douille d'accouplement 36 présente un replat 96 définissant parfaitement la position de l'arbre 58 par rapport à la douille 36. Il en résulte que le sous-ensemble 10 ne peut être accouplé au mécanisme 60 que pour un positionnement unique et parfaitement défini de la douille 36 par rapport à l'arbre 58.The rotation of the shaft 58 can be controlled by a manual handle 90 shown diagrammatically in FIG. 3. This handle 90 is mounted idly on the shaft 58 and cooperates by a system of drive and retaining pawls 92 with a wheel toothed 94 keyed onto the shaft 58. An alternating tilting of the handle 90 causes an intermittent drive in the same direction of the shaft 58, the ratchet system 92 authorizing a rotation of the shaft 58 in the same direction, independently of the handle 90. Such drive systems are well known. The closing spring 74 can also be reset by the gearmotor 10 coupled to the shaft 58. The conjugate sections of the end 56 of the shaft 58 and of the coupling sleeve 36 has a flat 96 perfectly defining the position of the shaft 58 relative to the socket 36. It follows that the sub-assembly 10 can only be coupled to the mechanism 60 for a unique and perfectly defined positioning of the socket 36 relative to the shaft 58.

Le fonctionnement du dispositif de commande selon l'invention est décrit ci-dessous plus particulièrement en référence à la figure 6, qui ne représente que les parties essentielles nécessaires à la compréhension de la description.The operation of the control device according to the invention is described below more particularly with reference to FIG. 6, which represents only the essential parts necessary for understanding the description.

Dans la position armée du ressort de fermeture 74, le galet 68 coopère avec le deuxième secteur 82 de la came 62 en exerçant sur cette dernière un couple tendant à la faire tourner dans le sens des aiguilles d'une montre, representé par la flèche sur la figure 6. Dans cette position d'armement la came 62 est retenue par le verrou 88. Le doigt 46 de la couronne planétaire 28, dont la position est parfaitement définie par rapport à celle de la came 62 par l'accouplement à replat 96, engage le levier 48 en provoquant l'ouverture du contact 50 et la libération du plateau porte-satellites 32. Le moteur électrique 16 n'est pas alimente, l'ensemble étant prêt à une manoeuvre de fermeture. Une telle manoeuvre de fermeture est déclenchée par le pivotement du verrou 88 autorisant une rotation de la came 62 dans le sens des aiguilles d'une montre sur la figure 6. Au cours de cette rotation le galet 68 quitte le deuxième secteur 82, le levier 70 pivotant sous l'action du ressort de fermeture 74 pour fermer les contacts 64 du disjoncteur. La rotation de la came 62 s'arrête dès que le galet 68 quitte le deuxième secteur 82, mais cette rotation limitée est transmise fidèlement par l'accouplement à replat 96 au planétaire 28. Elle est suffisante pour déplacer le doigt 46 et libérer le levier 48 pour fermer le contact 50 et engager le cliquet 40. Le moteur 16, alimenté par la fermeture du contact 50, entraîne en rotation le train d'engrenage 18 et par l'intermédiaire du différentiel bloqué 22 l'arbre 58 et la came 62. Cette rotation se poursuit pendant toute la course d'armement correspondant au premier secteur 80 de la came 62. Le passage du galet 68 du premier secteur 80 vers le deuxième secteur 82 correspond à la venue du doigt 46 au contact du levier 48. L'ensemble est agencé de telle manière que le débrayage provoqué par le dégagement du cliquet 40 intervient juste après le passage du galet 68 sur le deuxième secteur 82, ce débrayage arrêtant l'entraînement en rotation de l'arbre 58 et de la came 62 par le moteur 16. La came 62 poursuit sa course sous l'action du ressort de fermeture 74 jusqu'à la venue en butée sur le verrou 88. Le planétaire 28 débrayé du moteur 16 accompagne la came 62 dans sa course limitée, le doigt 46 étant agencé pour maintenir le levier 48 dans la position pivotée pendant toute cette course limitée. Simultanément au débrayage provoqué par le dégagement du cliquet 40 ou juste après ce débrayage le contact 50 est ouvert pour interrompre l'alimentation du moteur 16. Cette ouverture du contact 50 intervient en tous les cas avant la venue en butée de la came 62 sur le verrou 88. On est ainsi assuré que dans la position d'armement, représentée sur la figure 6, le moteur 16 est arrêté et débrayé, la came 62 étant dans une position prête à une manoeuvre d'enclenchement. L'ordre de mise en route du motoréducteur 10 après une manoeuvre d'enclenchement est transmis par l'arbre de liaison 58 et il est inutile de prévoir une connexion ou une liaison additionnelle pour cette commande de mise en route. La liaison par méplat 96 évite tout décalage entre la came 62 et le planétaire 28 assurant une synchronisation parfaite des déplacements et des commandes successifs. La mise en place du sous-ensemble motoréducteur sur le disjoncteur ne nécessite aucune opération compliquée puisqu'elle se résume à un emboîtement de la douille 36 sur l'extrémité 56 et cette mise en place peut être réalisée par l'utilisateur ou le distributeur. Le profit du deuxième secteur 82 de la came 62 limite les efforts exerçés sur le verrou 88 ainsi que le nombre d'accrochages de la commande.In the armed position of the closing spring 74, the roller 68 cooperates with the second sector 82 of the cam 62 by exerting on the latter a torque tending to make it rotate clockwise, represented by the arrow on Figure 6. In this cocking position the cam 62 is retained by the lock 88. The finger 46 of the planetary ring 28, the position of which is perfectly defined relative to that of the cam 62 by the flat coupling 96 , engages the lever 48 causing the opening of the contact 50 and the release of the planet carrier plate 32. The electric motor 16 is not powered, the assembly being ready for a closing operation. Such a closing maneuver is triggered by the pivoting of the latch 88 authorizing a rotation of the cam 62 in a clockwise direction in FIG. 6. During this rotation the roller 68 leaves the second sector 82, the lever 70 pivoting under the action of the closing spring 74 to close the contacts 64 of the circuit breaker. The rotation of the cam 62 stops as soon as the roller 68 leaves the second sector 82, but this limited rotation is faithfully transmitted by the flat coupling 96 to the sun gear 28. It is sufficient to move the finger 46 and release the lever 48 to close the contact 50 and engage the pawl 40. The motor 16, powered by the closing of the contact 50, rotates the gear train 18 and by means of the locked differential 22 the shaft 58 and the cam 62 This rotation continues throughout the arming stroke corresponding to the first sector 80 of the cam 62. The passage of the roller 68 from the first sector 80 to the second sector 82 corresponds to the arrival of the finger 46 in contact with the lever 48. L the assembly is arranged in such a way that the disengagement caused by the release of the pawl 40 occurs just after the passage of the roller 68 over the second sector 82, this disengagement stopping the rotation drive of the shaft 58 and of the cam 62 by the engine 16. L the cam 62 continues its stroke under the action of the closing spring 74 until the abutment on the latch 88. The sun gear 28 disengaged from the motor 16 accompanies the cam 62 in its limited stroke, the finger 46 being arranged to maintain the lever 48 in the pivoted position during this entire limited stroke. Simultaneously with the disengagement caused by the release of the pawl 40 or just after this disengagement, the contact 50 is open to interrupt the supply of the motor 16. This opening of the contact 50 occurs in all cases before the cam 62 comes into abutment on the lock 88. It is thus ensured that in the cocking position, shown in FIG. 6, the motor 16 is stopped and disengaged, the cam 62 being in a position ready for an engagement maneuver. The order to start the gearmotor 10 after an engagement maneuver is transmitted by the connecting shaft 58 and there is no need to provide an additional connection or link for this start-up command. The connection by flat 96 avoids any offset between the cam 62 and the sun gear 28 ensuring perfect synchronization of the displacements and of the successive commands. The installation of the gearmotor sub-assembly on the circuit breaker does not require any complicated operation since it boils down to a fitting of the socket 36 on the end 56 and this installation can be carried out by the user or the distributor. The profit of the second sector 82 of the cam 62 limits the forces exerted on the latch 88 as well as the number of hookings of the control.

L'invention n'est bien entendu nullement limitée au mode de mise en oeuvre plus particulièrement décrit et elle s'étend notamment à une commande dans laquelle le débrayage serait effectué par des moyens différents, ou celle encore utilisant des moyens d'accouplement différents.The invention is of course in no way limited to the mode of implementation more particularly described and it extends in particular to a control in which the declutching would be carried out by different means, or that again using different coupling means.

Claims (8)

1. Control device of an electric circuit breaker having a pair of contacts (64) and an opening spring (66) mechanism (60) to shift the moving contact in open position and a closing spring (74) mechanism to shift the moving contact in closed position, the charging of the opening spring (66) occurring at the time of the closing operation and the charging of the closing spring being carried out by a cam (62) driven in rotation by a motor (16), said reset cam cooperating with a roller (68) mechanically connected on one hand to the closing spring (74) and on the other hand to the moving contact (64), the profile of the cam (62) showing three successive sectors, a first sector (80) of the roller (68) shift by rotation of the cam (62) to charge the closing spring (74), a second sector (82) during which the action of the closing spring (74) on the cam (62) through the roller (68) tends to follow the cam rotation and a third sector (84) of the roller release for a snap closing operation of the contacts by the closing spring, a latch (88) being capable of interlocking the cam (62) in active position of said second sector (82), characterized In that it comprises a detection means (28,46,48) of the rotation of the cam (62) from the active position of the second sector (82) toward the active position of the third sector (84), said detection means (28, 46, 48) tripping a reset operation of the closing spring (74) by rotation of the cam (62) by said motor (16).
2. Control device according to claim 1, characterized in that said motor (16) and said cam (62) are connected by a cinematic chain (18) having a control member (28, 46) to stop the motor (16) and/or a disconnecting member to break said chain, said member travelling in step of the cam to induce said control in active position of said second sector (82) of the cam.
3. Control device according to claim 2, characterized in that said control member (28, 46) forms said detection means tripping the reset operation by starting said motor (16) again and/or by reconnecting at the time of a rotation of the cam (62) toward the active position of the third sector (84).
4. Control device according to claim 1, 2 or 3, characterized in that said motor (16), said cinematic chain (18) and said detection means (28, 46) make a sub-assembly (10) likely to be coupled to said mechanism (60) comprising said cam (62), a single point (56, 36) of mechanical link connecting said sub-assembly to said mechanism.
5. Control device according to claim 4, characterized in that said mechanical link (56, 36) is disposed to permit a coupling only in a single position, thoroughly defined, of the detection means (28, 46) with regard to the cam (62).
6. Control device according to any of the former claims, characterized in that said detection means (28, 46) is a control cam of an electric contact (50) inserted in the circuit of the motor (16) supply.
7. Control device according to any of the former claims, characterized in that the cinematic chain (18) to link the motor (16) and the reset cam (62) comprises a differential mechanism (22) with satellite-holder (32) likely to be released to break said chain.
8. Control device according to any of the former claims, characterized in that said second sector (82) shows a weak slope to derive from the force of the closing spring (74) a limited torque of rotation of the cam (62) likely to be taken again by said latch (88).
EP85100341A 1984-01-30 1985-01-15 Control device for electric circuit breaker Expired EP0150756B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85100341T ATE34484T1 (en) 1984-01-30 1985-01-15 DEVICE FOR CONTROLLING AN ELECTRIC CIRCUIT BREAKER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8401527A FR2558986B1 (en) 1984-01-30 1984-01-30 DEVICE FOR CONTROLLING AN ELECTRIC CIRCUIT BREAKER
FR8401527 1984-01-30

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EP0150756A2 EP0150756A2 (en) 1985-08-07
EP0150756A3 EP0150756A3 (en) 1985-09-18
EP0150756B1 true EP0150756B1 (en) 1988-05-18

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EP (1) EP0150756B1 (en)
JP (1) JPH0644439B2 (en)
AT (1) ATE34484T1 (en)
AU (1) AU575903B2 (en)
CA (1) CA1231745A (en)
DE (1) DE3562838D1 (en)
FR (1) FR2558986B1 (en)
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Also Published As

Publication number Publication date
JPS60180018A (en) 1985-09-13
AU3819885A (en) 1985-08-08
US4649244A (en) 1987-03-10
JPH0644439B2 (en) 1994-06-08
EP0150756A3 (en) 1985-09-18
EP0150756A2 (en) 1985-08-07
CA1231745A (en) 1988-01-19
ATE34484T1 (en) 1988-06-15
AU575903B2 (en) 1988-08-11
FR2558986B1 (en) 1986-11-21
DE3562838D1 (en) 1988-06-23
ZA85601B (en) 1985-09-25
FR2558986A1 (en) 1985-08-02

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