EP0663678A1 - Temperature limiter - Google Patents

Temperature limiter Download PDF

Info

Publication number
EP0663678A1
EP0663678A1 EP95420006A EP95420006A EP0663678A1 EP 0663678 A1 EP0663678 A1 EP 0663678A1 EP 95420006 A EP95420006 A EP 95420006A EP 95420006 A EP95420006 A EP 95420006A EP 0663678 A1 EP0663678 A1 EP 0663678A1
Authority
EP
European Patent Office
Prior art keywords
temperature
temperature limiter
limiter according
magnet
tube
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
Application number
EP95420006A
Other languages
German (de)
French (fr)
Other versions
EP0663678B1 (en
Inventor
Jean Serigny
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.)
Cotherm SA
Original Assignee
Cotherm 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
Priority claimed from FR9400564A external-priority patent/FR2715245B1/en
Application filed by Cotherm SA filed Critical Cotherm SA
Publication of EP0663678A1 publication Critical patent/EP0663678A1/en
Application granted granted Critical
Publication of EP0663678B1 publication Critical patent/EP0663678B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/58—Thermally-sensitive members actuated due to thermally controlled change of magnetic permeability

Definitions

  • the present invention relates to improvements made to temperature limiters intended to ensure the safety of any heating system and in particular of a halogen and / or radiant cooking hearth, the heating power of which is regulated by a metering device. energy or any other system, because it is in this case that its application seems to be of most interest.
  • French patent 1,204,872 describes an alarm device for a heat engine based on the sudden variation in the magnetic permeability (Curie point) of a pellet made of an alloy of suitable composition and which cooperates with a mobile assembly loaded elastically with combination with a magnet so as to control the opening of the contacts of an electrical circuit.
  • the temperature limiter according to the aforementioned French patent has a main drawback concerning the nature of the materials used.
  • the tube containing the mobile assembly is made of stainless steel, so that its expansion harms the precise triggering of the device at the desired temperature.
  • the more the distance between the magnet and the metal alloy tablet is increased the more the attraction force decreases, so that the magnet is freed more quickly from said tablet. This results in a decrease in the speed of triggering and reclosing, because the force of the spring approaches the force of attraction between the magnet and the pad.
  • the stainless steel tube does not guarantee electrical insulation between the metal parts and the live cooking hearth.
  • the device according to the French patent considered has a second drawback consisting in the fact that the magnet is placed at the end of the device, therefore at the place where the temperature is the highest.
  • the limit of use of permanent magnets withstanding the best temperature is of the order of 500 ° C. Therefore, under these conditions, the magnet is caused to quickly lose its magnetic permeability, and therefore its force of attraction.
  • the device according to French patent 1 204 872 is a safety device and not a temperature limiter which must operate a large number of times around the limit temperature.
  • Limiters are also known which are in the form of a probe placed near lamps or resistors and which are made up of two elements, a glass tube which practically does not expand and a metal rod expanding inside said tube. It is necessary to adjust the relative position of the two elements to obtain tripping at the right temperature, which constitutes long and costly operations. In addition, the product is fragile.
  • the improvements which are the subject of the present invention aim to remedy the aforementioned drawbacks and to allow the production of a temperature limiter which responds better than hitherto to the wishes of the practice, in particular when combined with a halogen and / or radiant cooking hearth in order to protect the vitro-ceramic plate placed above said hearth and receiving the cooking utensils.
  • the temperature limiter comprises a ceramic casing communicating with at least one ceramic tube which comprises an alloy pellet with a determined Curie temperature, a magnet secured to a plunger, which comprises means for adjustment for the recovery of functional clearances, said means cooperating inside the housing with an elastic blade constrained so as to play the role of a return spring to exert a pressure force capable of controlling the opening and closing of contacts belonging to an electrical circuit.
  • the temperature limiter may further comprise means for controlling the opening and closing of a signaling circuit so that the latter is open in the temperature range between 0 and 50 to 60 ° C and closed between this temperature zone and the opening temperature of the main circuit in order, in this case, to switch on a signal lamp.
  • the limiter according to the invention is intended to replace those using the principle of differential expansion which prove on the one hand very fragile and on the other hand very bulky due to the materials used (quartz tube).
  • the limiter according to the invention is more versatile due to its short tube which fits on cooking zones of different diameters.
  • Fig. 1 is a longitudinal section of a temperature limiter according to the invention in the rest state.
  • Fig. 2 is a view similar to that of FIG. 1, but showing the limiter in operation, that is to say interrupting the supply circuit of the protected device.
  • Fig. 3 illustrates a first variant of the limiter of FIG. 1.
  • the high temperature limiter illustrated in fig. 1 essentially comprises a ceramic tube 1, one end of which is closed by a patch 2 made of a metal alloy with a determined point of curie, while its opposite end is secured to a housing 3 also provided in ceramic. It can be seen that the face of the housing 3 on which the tube 1 is applied has a hole 3 a whose geometric axis extends that of the tube 1. The housing also has a peripheral partition 3 b in which a hole 3 c is formed, the the geometric axis corresponds to that of the hole 3 a and of the tube 1.
  • a stationary contact 4 mounted on a rigid plate 4 and a second contact 5 is supported by an elastic blade 5 of the leaf spring type.
  • a stop 3 d of the housing limits the movement of the blade 5, as will be explained better below.
  • the pellet 2 made of a metal alloy with a determined Curie point is arranged in a recess 1 a provided at the end of the tube 1.
  • the tube contains a magnet 6 which is in the form of a solid cylinder and which can move longitudinally freely in the bore of the tube 1.
  • the magnet 6 is of the ALNICO type, that is to say composed of aluminum, nickel and cobalt so that it can operate up to neighboring temperatures of 550 ° C without said magnet losing its magnetic properties.
  • the rod 8 allows due to its sliding within the bore 7A of the plunger 7 to perform a length adjustment to recover differences in functional clearances incompatible with the proper functioning of the limiter.
  • the rod 8 is immobilized by means of the screw 7 b inside the bore 7 a of the plunger 7. It goes without saying that the Curie temperature of the plunger 7 must be greater than that of the tablet 2.
  • the housing 3 and the magnet 6 are obtained by molding or sintering at high temperature and because of the materials used undergo significant and uncontrollable shrinkage during cooling.
  • the setting of each limiter is essential to guarantee the reproducibility of the regulation temperature.
  • the regulation temperature is a function of the force binding the magnet 6 to the pellet 2 in alloy at the temperature of the determined curie, except the value of the latter is inversely proportional to the square of the distance separating them.
  • the elastic blade 5 is constrained, that is to say placed in its deformed position when the magnet 6 is in contact with the pad 2, while it returns to its rest position when the magnet 6 is no longer attracted to the pellet 2 due to its demagnetization by the increase in temperature in its vicinity.
  • the blade 5 responsible for the elastic return of the magnet 6 and for the passage of the current must be made of an alloy of the NICKEL-BERYLLIUM type which is the only one to guarantee both excellent mechanical characteristics and good electrical conductivity .
  • FIG. 3 Illustrated in fig. 3 an alternative embodiment of the limiter illustrated in FIG. 1 and 2.
  • the elements corresponding to those of FIG. 1 and 2 have been referenced by the same figures and the same indices.
  • the purpose of the variant illustrated in FIG. 3 is to provide in addition means for controlling the opening and closing of a signaling circuit 11 so that it is open in the temperature range between 0 and 50 to 60 ° C and closed between these latter temperatures and that of opening of the circuit main 12 so as, in the latter case, to supply a warning lamp 11 a signaling that the device associated with the considered limiter is still hot.
  • the housing 3 is designed to receive a second tube 1 'parallel and identical to the first 1 and into which are inserted a pellet 2', a magnet 6 ', a plunger 7' and a rod 8 '.
  • the tablet 2 ' has a Curie point corresponding to approximately 50 to 60 ° C, different from that of the tablet 2 of the first tube 1.
  • the plunger 7 ' has a bore 7' a and a screw 7 ' b for adjusting the length of the rod 8'.
  • the Curie temperature of the plunger 7 ' is also higher than that of the pellet 2'.
  • the shape of the internal partitions is slightly modified to constitute two distinct spaces 3 e , 3 f separated by an internal partition 3 g .
  • the fixed contact 4 mounted on a rigid plate 4 and a second contact 5 is supported by an elastic blade 5 which is connected to the plunger 7 by means of the rod 8.
  • the contacts 4 a and 5 a of the wafer 4 and of the blade 5 are connected to the main supply circuit 12 via the terminals 9 and 10.
  • the latter contains a rigid tongue 13 the end of which comprises a fixed contact 13 a and a second elastic blade 14 which carries at its free end a movable contact 14 a .
  • the tongue 13 is connected to an output terminal 15 and the blade 14 has an output terminal 16 from which the signaling circuit 11 is connected.
  • the plungers 7 and 7 ' are respectively connected to the elastic blades 6 and 14 according to the arrangement shown in fig. 1 and 2.
  • the plungers 7, 7 ' respectively comprise an adjustable rod 8 and 8' secured to a latching system or head 8 a, 8 'is made of ceramic or metal.
  • the elastic blades 6 and 14 are previously deformed to respectively exert a pressure force between the contacts 4 a and 5 a ; 13 a and 14 a .
  • the limiter according to the invention is in the rest state, that is to say that the main power circuit 12 of the associated device can be placed under voltage.
  • the pad 2 When we reach fifty degrees C, the pad 2 'ceases to be magnetic, so that the magnet 6' moves under the effect of the reaction of the elastic blade 14. The displacement of the plunger 7 'leads that of the magnet 6', so that the contacts 13a and 14a come to lie one on the other. In this position, the signaling circuit 11 is closed as well as the main supply circuit 12, so that the device can continue to heat. When it reaches the temperature set for the demagnetization of the pellet 2, the blade 5 acts on the magnet 6 to move it, so that the contacts 4 a and 5 a separate. Under these conditions, the supply circuit is cut.
  • the temperature drops, the contacts 4 a , 5 a close and the magnet 6 again comes into contact with the pad 2.
  • the pad 2 'attracts the magnet 6', so that the plunger 7 'is moved, so that the blade 14 is deformed and that the contacts 13 a and 14 a separate.
  • the limiter described above is called to operate at high temperature, that is to say in an environment of 500 ° C to 600 ° C for the tube 1, 1 'and 250 ° C for the housing 3 and more particularly the part containing the contacts 4 a, 5 a, 13 a, 14 a, forcing choosing very specific materials to resist all stresses.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Hard Magnetic Materials (AREA)
  • Inorganic Insulating Materials (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Glass Compositions (AREA)
  • Cookers (AREA)
  • Food-Manufacturing Devices (AREA)
  • General Induction Heating (AREA)
  • Fuses (AREA)
  • Meat, Egg Or Seafood Products (AREA)
  • Baking, Grill, Roasting (AREA)

Abstract

The temperature limiter includes a ceramic box (3) communicating with at least one ceramic tube (1). The tube contains a pastille of temperature alloy (2) with a given Curie temperature. A magnet (6) is solidly attached to a plunger (7) comprising an adjustment (7a,7b,8) for recovering the operational play. These components co-operates within the box (3) with an elastic lamella (5) which is bent in order to form a return spring. This arranged in order to open and close the contacts (4a, 5a).

Description

La présente invention est relative à des perfectionnements apportés aux limiteurs de température destinés à assurer la sécurité d'un système de chauffage quelconque et en particulier d'un foyer de cuisson halogène et/ou radiant dont la puissance de chauffe est régulée par un doseur d'énergie ou par tout autre système, car c'est dans ce cas que son application paraît devoir présenter le plus d'intérêt.The present invention relates to improvements made to temperature limiters intended to ensure the safety of any heating system and in particular of a halogen and / or radiant cooking hearth, the heating power of which is regulated by a metering device. energy or any other system, because it is in this case that its application seems to be of most interest.

Le brevet français 1 204 872 décrit un dispositif d'alarme pour moteur thermique basé sur la brusque variation de la perméabilité magnétique (point de Curie) d'une pastille réalisée en un alliage de composition appropriée et qui coopère avec un équipage mobile chargé élastiquement en combinaison avec un aimant de manière à commander l'ouverture des contacts d'un circuit électrique. Le limiteur de température suivant le brevet français précité présente un inconvénient principal concernant la nature des matériaux utilisés. En effet, le tube renfermant l'équipage mobile est réalisé en acier inoxydable, si bien que sa dilatation nuit au déclenchement précis de l'appareil à la température désirée. En effet, plus on augmente la distance entre l'aimant et la pastille en alliage métallique, plus la force d'attraction diminue, si bien que l'aimant est plus rapidement libéré de ladite pastille. Il s'ensuit une diminution de la rapidité de déclenchement et de réenclenchement, car la force du ressort se rapproche de la force d'attraction entre l'aimant et la pastille. De plus, le tube en acier inoxydable ne garantit pas l'isolation électrique entre les parties métalliques et le foyer de cuisson sous tension.French patent 1,204,872 describes an alarm device for a heat engine based on the sudden variation in the magnetic permeability (Curie point) of a pellet made of an alloy of suitable composition and which cooperates with a mobile assembly loaded elastically with combination with a magnet so as to control the opening of the contacts of an electrical circuit. The temperature limiter according to the aforementioned French patent has a main drawback concerning the nature of the materials used. In fact, the tube containing the mobile assembly is made of stainless steel, so that its expansion harms the precise triggering of the device at the desired temperature. In fact, the more the distance between the magnet and the metal alloy tablet is increased, the more the attraction force decreases, so that the magnet is freed more quickly from said tablet. This results in a decrease in the speed of triggering and reclosing, because the force of the spring approaches the force of attraction between the magnet and the pad. In addition, the stainless steel tube does not guarantee electrical insulation between the metal parts and the live cooking hearth.

Le dispositif suivant le brevet français considéré comporte un second inconvénient consistant dans le fait que l'aimant se trouve placé à l'extrémité du dispositif, donc à l'endroit où la température est la plus élevée. Or, la limite d'utilisation des aimants permanents résistant le mieux à la température est de l'ordre de 500°C. Donc, dans ces conditions, l'aimant est amené à perdre rapidement de sa perméabilité magnétique, donc de sa force d'attraction. Enfin, le dispositif suivant le brevet français 1 204 872 est un dispositif de sécurité et non pas un limiteur de température devant fonctionner un grand nombre de fois autour de la température limite.The device according to the French patent considered has a second drawback consisting in the fact that the magnet is placed at the end of the device, therefore at the place where the temperature is the highest. However, the limit of use of permanent magnets withstanding the best temperature is of the order of 500 ° C. Therefore, under these conditions, the magnet is caused to quickly lose its magnetic permeability, and therefore its force of attraction. Finally, the device according to French patent 1 204 872 is a safety device and not a temperature limiter which must operate a large number of times around the limit temperature.

On connaît aussi des limiteurs qui se présentent sous la forme d'une sonde disposée à proximité de lampes ou de résistances et qui sont constitués de deux éléments, un tube de verre qui ne se dilate pratiquement pas et une tige de métal se dilatant à l'intérieur dudit tube. Il faut ajuster la position relative des deux éléments pour obtenir le déclenchement à la bonne température, ce qui constitue des opérations longues et coûteuses. De plus, le produit est fragile.Limiters are also known which are in the form of a probe placed near lamps or resistors and which are made up of two elements, a glass tube which practically does not expand and a metal rod expanding inside said tube. It is necessary to adjust the relative position of the two elements to obtain tripping at the right temperature, which constitutes long and costly operations. In addition, the product is fragile.

Les perfectionnements qui font l'objet de la présente invention visent à remédier aux inconvénients précités et à permettre la réalisation d'un limiteur de température qui réponde mieux que jusqu'à présent aux desiderata de la pratique, en particulier lorsqu'il est associé à un foyer de cuisson halogène et/ou radiant en vue de protéger la plaque vitro-céramique disposée au-dessus dudit foyer et recevant les ustensiles de cuisson.The improvements which are the subject of the present invention aim to remedy the aforementioned drawbacks and to allow the production of a temperature limiter which responds better than hitherto to the wishes of the practice, in particular when combined with a halogen and / or radiant cooking hearth in order to protect the vitro-ceramic plate placed above said hearth and receiving the cooking utensils.

A cet effet, le limiteur de température suivant l'invention comprend un boîtier en céramique communiquant avec au moins un tube en céramique qui comporte une pastille en alliage à température de Curie déterminée, un aimant solidaire d'un plongeur, lequel comprend des moyens de réglage pour la récupération des jeux fonctionnels, lesdits moyens coopérant à l'intérieur du boîtier avec une lame élastique contrainte de manière à jouer le rôle d'un ressort de rappel pour exercer une force de pression susceptible de commander l'ouverture et la fermeture de contacts appartenant à un circuit électrique.To this end, the temperature limiter according to the invention comprises a ceramic casing communicating with at least one ceramic tube which comprises an alloy pellet with a determined Curie temperature, a magnet secured to a plunger, which comprises means for adjustment for the recovery of functional clearances, said means cooperating inside the housing with an elastic blade constrained so as to play the role of a return spring to exert a pressure force capable of controlling the opening and closing of contacts belonging to an electrical circuit.

En variante, le limiteur de température peut comporter en outre des moyens de commander l'ouverture et la fermeture d'un circuit de signalisation afin que ce dernier soit ouvert dans la plage de température comprise entre 0 et 50 à 60°C et fermé entre cette zone de température et la température d'ouverture du circuit principal afin, dans ce cas, de mettre une lampe de signalisation sous tension.As a variant, the temperature limiter may further comprise means for controlling the opening and closing of a signaling circuit so that the latter is open in the temperature range between 0 and 50 to 60 ° C and closed between this temperature zone and the opening temperature of the main circuit in order, in this case, to switch on a signal lamp.

Le limiteur suivant l'invention est prévu pour remplacer ceux utilisant le principe de la dilatation différentielle qui s'avèrent d'une part très fragiles et d'autre part très encombrants du fait des matériaux utilisés (tube quartz).The limiter according to the invention is intended to replace those using the principle of differential expansion which prove on the one hand very fragile and on the other hand very bulky due to the materials used (quartz tube).

De plus le limiteur suivant l'invention est plus polivalent du fait de son tube court qui s'adapte sur des foyers de cuisson de différents diamètres.In addition, the limiter according to the invention is more versatile due to its short tube which fits on cooking zones of different diameters.

Le dessin annexé, donné à titre d'exemple, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer :The appended drawing, given by way of example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is capable of providing:

Fig. 1 est une coupe longitudinale d'un limiteur de température suivant l'invention à l'état de repos.Fig. 1 is a longitudinal section of a temperature limiter according to the invention in the rest state.

Fig. 2 est une vue semblable à celle de fig. 1, mais montrant le limiteur en fonctionnement, c'est-à-dire interrompant le circuit d'alimentation de l'appareil protégé.Fig. 2 is a view similar to that of FIG. 1, but showing the limiter in operation, that is to say interrupting the supply circuit of the protected device.

Fig. 3 illustre une première variante du limiteur de fig. 1.Fig. 3 illustrates a first variant of the limiter of FIG. 1.

Le limiteur de haute température illustré en fig. 1 comprend essentiellement un tube en céramique 1 dont l'une des extrémités est fermée par une pastille 2 réalisée en un alliage métallique à point de curie déterminé, tandis que son extrémité opposée est solidaire d'un boîtier 3 prévu également en céramique. On observe que la face du boîtier 3 sur laquelle est appliqué le tube 1 comporte un trou 3a dont l'axe géométrique prolonge celui du tube 1. Le boîtier comporte encore une cloison périphérique 3b dans laquelle est ménagé un trou 3c dont l'axe géométrique correspond à celui du trou 3a et du tube 1.The high temperature limiter illustrated in fig. 1 essentially comprises a ceramic tube 1, one end of which is closed by a patch 2 made of a metal alloy with a determined point of curie, while its opposite end is secured to a housing 3 also provided in ceramic. It can be seen that the face of the housing 3 on which the tube 1 is applied has a hole 3 a whose geometric axis extends that of the tube 1. The housing also has a peripheral partition 3 b in which a hole 3 c is formed, the the geometric axis corresponds to that of the hole 3 a and of the tube 1.

Dans le boîtier 3 se trouve un contact fixe 4a monté sur une plaquette rigide 4 et un second contact 5a porté par une lame élastique 5 du type lame ressort. Une butée 3d du boîtier limite le déplacement de la lame 5, comme on l'expliquera mieux plus loin.In the housing 3 is a stationary contact 4 mounted on a rigid plate 4 and a second contact 5 is supported by an elastic blade 5 of the leaf spring type. A stop 3 d of the housing limits the movement of the blade 5, as will be explained better below.

La pastille 2 réalisée en un alliage métallique à point de Curie déterminé est disposée dans un chambrage 1a prévu à l'extrémité du tube 1. Le tube contient un aimant 6 se présentant sous la forme d'un cylindre plein et qui peut se déplacer longitudinalement de manière libre dans l'alésage du tube 1. L'aimant 6 est du type ALNICO, c'est-à-dire composé d'aluminium, de nickel et de cobalt pour qu'il puisse fonctionner jusqu'à des températures voisines de 550°C sans que ledit aimant ne perde ses propriétés magnétiques.The pellet 2 made of a metal alloy with a determined Curie point is arranged in a recess 1 a provided at the end of the tube 1. The tube contains a magnet 6 which is in the form of a solid cylinder and which can move longitudinally freely in the bore of the tube 1. The magnet 6 is of the ALNICO type, that is to say composed of aluminum, nickel and cobalt so that it can operate up to neighboring temperatures of 550 ° C without said magnet losing its magnetic properties.

Dans le trou 3a est monté à coulissement libre un plongeur en matière magnétique 7 dont l'une des extrémités est plaquée contre l'aimant par soudage, collage ou par magnétisme, tandis que son autre extrémité est percée d'un alésage lisse 7a recevant une vis de serrage 7b pour le blocage d'une tige 8. Cette dernière est pourvue d'une tête 8a en céramique permettant l'accrochage de la lame ressort 5. La tige 8 permet du fait de son coulissement à l'intérieur de l'alésage 7a du plongeur 7 d'effectuer un réglage en longueur pour récupérer des différences de jeux fonctionnels incompatibles avec le bon fonctionnement du limiteur. Lorsque les réglages sont réalisés, la tige 8 est immobilisée par l'intermédiaire de la vis 7b à l'intérieur de l'alésage 7a du plongeur 7. Il va de soi que la température de Curie du plongeur 7 doit être supérieure à celle de la pastille 2.In the hole 3 a is mounted in free sliding a plunger in material magnetic 7, one end of which is pressed against the magnet by welding, bonding or magnetism, while its other end is pierced with a smooth bore 7 a receiving a clamping screw 7 b for blocking a rod 8. the latter is provided with a head 8 has ceramic for the blade of the spring attachment 5. the rod 8 allows due to its sliding within the bore 7A of the plunger 7 to perform a length adjustment to recover differences in functional clearances incompatible with the proper functioning of the limiter. When the adjustments are made, the rod 8 is immobilized by means of the screw 7 b inside the bore 7 a of the plunger 7. It goes without saying that the Curie temperature of the plunger 7 must be greater than that of the tablet 2.

En effet, l'emploi de céramique pour le boîtier 3 et d'aluminium, nickel, cobalt (ALNICO) pour l'aimant 6 impose d'avoir recours à un système de compensation des dispersions sur la dimension des pièces qui est obtenu par le réglage en longueur de la tige 8 du fait des mauvaises tolérances de fabrication des matériaux utilisés.In fact, the use of ceramic for the housing 3 and of aluminum, nickel, cobalt (ALNICO) for the magnet 6 makes it necessary to have recourse to a system of compensation for dispersions on the dimension of the parts which is obtained by the adjustment in length of the rod 8 due to the poor manufacturing tolerances of the materials used.

Le boîtier 3 et l'aimant 6 sont obtenus par moulage ou frittage à haute température et du fait des matériaux employés subissent des retraits importants et incontrôlables lors du refroidissement.The housing 3 and the magnet 6 are obtained by molding or sintering at high temperature and because of the materials used undergo significant and uncontrollable shrinkage during cooling.

Ainsi le réglage de chaque limiteur est indispensable pour garantir la reproductivité de la température de régulation. En effet, la température de régulation est fonction de la force liant l'aimant 6 à la pastille 2 en alliage à température du curie déterminé, hors la valeur de celle-ci est inversement proportionnelle au carré de la distance les séparant.Thus the setting of each limiter is essential to guarantee the reproducibility of the regulation temperature. Indeed, the regulation temperature is a function of the force binding the magnet 6 to the pellet 2 in alloy at the temperature of the determined curie, except the value of the latter is inversely proportional to the square of the distance separating them.

Il en découle par exemple que si un entrefer apparaît à cause d'un aimant trop court ou d'un logement en céramique trop long par rapport à la longueur nominale permettant la régulation à la température désirée, le limiteur régulera à une température plus basse que celle à laquelle il doit fonctionner.It follows for example that if an air gap appears because of a too short magnet or a ceramic housing too long compared to the nominal length allowing regulation at the desired temperature, the limiter will regulate at a lower temperature than the one it should operate on.

Le fonctionnement est le suivant :The operation is as follows:

Dans la position de fig. 1, il est possible de mettre sous tension le circuit d'alimentation du foyer chauffant branché à des bornes 9, 10 reliées aux contacts 4a et 5a de la plaquette 4 et de la lame 5. Les caractéristiques de la pastille 2 sont telles qu'à partir d'une certaine température, par exemple 550°C, cette pastille est démagnétisée, de sorte que l'aimant 6 n'est plus attiré par elle . A ce moment, la lame élastique 5 devient prépondérante et fait déplacer l'ensemble des trois pièces 6, 7, 8 vers la gauche, de telle sorte que la lame 5 vient en appui contre la butée 3d et que les contacts 4a, 5a se séparent pour ouvrir le circuit. L'alimentation de l'appareil surveillé est donc interrompue. A ce moment, il existe un jeu X entre l'aimant 6 et la pastille 2 qui se trouve bien entendu fixe en translation (fig. 2).In the position of fig. 1, it is possible to turn on the power supply circuit of the heated fireplace connected to terminals 9, 10 connected to the contacts 4 a and 5 a of the plate 4 and of the blade 5. The characteristics of the pad 2 are such that from a certain temperature, for example 550 ° C., this pad is demagnetized, so that magnet 6 is no longer attracted to it. At this moment, the elastic blade 5 becomes preponderant and causes all of the three parts 6, 7, 8 to move to the left, so that the blade 5 comes to bear against the stop 3 d and that the contacts 4 a , 5 a separate to open the circuit. The power supply to the monitored device is therefore interrupted. At this time, there is a clearance X between the magnet 6 and the pad 2 which is of course fixed in translation (fig. 2).

Lorsque le circuit aboutissant aux bornes 9, 10 est coupé, la température de l'appareil baisse, de telle sorte que la pastille 2 retrouvant ses qualités d'attirance, l'aimant 6 se déplace alors vers la droite en direction de ladite pastille sur la longueur du jeu X. Comme le plongeur 7 est métallique, il est également déplacé par l'aimant à condition bien entendu que la force d'attraction magnétique soit supérieure à la réaction de la lame élastique 5. Dans ces conditions, l'élasticité de la lame 5 participe au déplacement vers la droite de l'aimant 6, du plongeur 7, de telle sorte que les contacts 4a, 5a se referment à nouveau et l'on revient à la position de fig. 1.When the circuit leading to terminals 9, 10 is cut, the temperature of the device drops, so that the patch 2 regains its qualities of attraction, the magnet 6 then moves to the right towards said patch on the length of the clearance X. As the plunger 7 is metallic, it is also moved by the magnet provided of course that the magnetic attraction force is greater than the reaction of the elastic blade 5. Under these conditions, the elasticity of the blade 5 participates in the movement to the right of the magnet 6, of the plunger 7, so that the contacts 4 a , 5 a close again and one returns to the position of fig. 1.

On remarque que la lame élastique 5 est contrainte, c'est-à-dire placée dans sa position déformée lorsque l'aimant 6 est au contact de la pastille 2, tandis qu'elle revient dans sa position de repos lorsque l'aimant 6 n'est plus attiré par la pastille 2 du fait de sa démagnétisation par l'augmentation de la température à son voisinage.It is noted that the elastic blade 5 is constrained, that is to say placed in its deformed position when the magnet 6 is in contact with the pad 2, while it returns to its rest position when the magnet 6 is no longer attracted to the pellet 2 due to its demagnetization by the increase in temperature in its vicinity.

On note que la lame 5 chargée du rappel élastique de l'aimant 6 et du passage du courant doit être réalisée dans un alliage du type NICKEL-BERYLLIUM qui est le seul à garantir à la fois d'excellentes caractéristiques mécaniques et une bonne conductivité électrique.It is noted that the blade 5 responsible for the elastic return of the magnet 6 and for the passage of the current must be made of an alloy of the NICKEL-BERYLLIUM type which is the only one to guarantee both excellent mechanical characteristics and good electrical conductivity .

On a illustré en fig. 3 une variante d'exécution du limiteur illustré en fig. 1 et 2. Sur cette figure, les éléments correspondant à ceux de fig. 1 et 2 ont été référencés par les mêmes chiffres et les mêmes indices.Illustrated in fig. 3 an alternative embodiment of the limiter illustrated in FIG. 1 and 2. In this figure, the elements corresponding to those of FIG. 1 and 2 have been referenced by the same figures and the same indices.

Le but de la variante illustrée en fig. 3 consiste à prévoir en outre des moyens de commander l'ouverture et la fermeture d'un circuit de signalisation 11 afin qu'il soit ouvert dans la plage de températures comprise entre 0 et 50 à 60°C et fermé entre ces dernières températures et celle d'ouverture du circuit principal 12 de manière, dans ce dernier cas, à alimenter une lampe témoin 11a signalant que l'appareil associé au limiteur considéré est encore chaud.The purpose of the variant illustrated in FIG. 3 is to provide in addition means for controlling the opening and closing of a signaling circuit 11 so that it is open in the temperature range between 0 and 50 to 60 ° C and closed between these latter temperatures and that of opening of the circuit main 12 so as, in the latter case, to supply a warning lamp 11 a signaling that the device associated with the considered limiter is still hot.

Conformément à la variante de fig. 3, le boîtier 3 est prévu pour recevoir un second tube 1' parallèle et identique au premier 1 et dans lequel sont introduits une pastille 2', un aimant 6' un plongeur 7' et une tige 8' . La pastille 2' présente un point de Curie correspondant à environ 50 à 60°C, différent de celui de la pastille 2 du premier tube 1.According to the variant of fig. 3, the housing 3 is designed to receive a second tube 1 'parallel and identical to the first 1 and into which are inserted a pellet 2', a magnet 6 ', a plunger 7' and a rod 8 '. The tablet 2 'has a Curie point corresponding to approximately 50 to 60 ° C, different from that of the tablet 2 of the first tube 1.

Il va de soi que le plongeur 7' comporte un alésage 7'a et une vis 7'b pour le réglage en longueur de la tige 8' . La température de Curie du plongeur 7' est en outre supérieure à celle de la pastille 2' .It goes without saying that the plunger 7 'has a bore 7' a and a screw 7 ' b for adjusting the length of the rod 8'. The Curie temperature of the plunger 7 'is also higher than that of the pellet 2'.

Dans le boîtier 3, la forme des cloisons internes est légèrement modifiée pour constituer deux espaces distincts 3e, 3f séparés par une cloison interne 3g.In the housing 3, the shape of the internal partitions is slightly modified to constitute two distinct spaces 3 e , 3 f separated by an internal partition 3 g .

A l'intérieur de l'espace 3e se trouve le contact fixe 4a monté sur une plaquette rigide 4 et un second contact 5a porté par une lame élastique 5 qui est reliée au plongeur 7 par l'intermédiaire de la tige 8. Les contacts 4a et 5a de la plaquette 4 et de la lame 5 sont reliés au circuit d'alimentation principal 12 par l'intermédiaire des bornes 9 et 10.Inside the space 3 e is the fixed contact 4 mounted on a rigid plate 4 and a second contact 5 is supported by an elastic blade 5 which is connected to the plunger 7 by means of the rod 8. The contacts 4 a and 5 a of the wafer 4 and of the blade 5 are connected to the main supply circuit 12 via the terminals 9 and 10.

En ce qui concerne l'espace 3f, ce dernier renferme une languette rigide 13 dont l'extrémité comporte un contact fixe 13a et une seconde lame élastique 14 qui porte à son extrémité libre un contact mobile 14a.With regard to the space 3 f , the latter contains a rigid tongue 13 the end of which comprises a fixed contact 13 a and a second elastic blade 14 which carries at its free end a movable contact 14 a .

La languette 13 est reliée à une borne de sortie 15 et la lame 14 a une borne de sortie 16 à partir desquelles est branché le circuit de signalisation 11.The tongue 13 is connected to an output terminal 15 and the blade 14 has an output terminal 16 from which the signaling circuit 11 is connected.

Suivant la variante de fig. 3, on remarque que les plongeurs 7 et 7' sont reliés respectivement aux lames élastiques 6 et 14 selon l'agencement représenté en fig. 1 et 2. En effet, les plongeurs 7, 7' comportent respectivement une tige réglable 8 et 8' solidaire d'un système d'accrochage ou tête 8a, 8'a réalisé en céramique ou en métal. Dans cette variante, les lames élastiques 6 et 14 sont préalablement déformées pour excercer respectivement une force de pression entre les contacts 4a et 5a ; 13a et 14a.According to the variant of fig. 3, we note that the plungers 7 and 7 'are respectively connected to the elastic blades 6 and 14 according to the arrangement shown in fig. 1 and 2. In fact, the plungers 7, 7 'respectively comprise an adjustable rod 8 and 8' secured to a latching system or head 8 a, 8 'is made of ceramic or metal. In this variant, the elastic blades 6 and 14 are previously deformed to respectively exert a pressure force between the contacts 4 a and 5 a ; 13 a and 14 a .

Dans la position illustrée fig. 3, le limiteur suivant l'invention est à l'état de repos, c'est-à-dire que le circuit principal d'alimentation 12 de l'appareil associé peut être placé sous tension.In the position illustrated in fig. 3, the limiter according to the invention is in the rest state, that is to say that the main power circuit 12 of the associated device can be placed under voltage.

Si c'est le cas, il y a élévation de la température ambiante. Lorsqu'on arrive à une cinquantaine de degrés C, la pastille 2' cesse d'être magnétique, de telle sorte que l'aimant 6' se déplace sous l'effet de la réaction de la lame élastique 14. Le déplacement du plongeur 7' entraîne celui de l'aimant 6', de telle sorte que les contacts 13a et 14a viennent s'appliquer l'un sur l'autre. Dans cette position, le circuit de signalisation 11 est fermé ainsi que le circuit principal d'alimentation 12, de sorte que l'appareil peut continuer à chauffer. Lorsqu'il atteint la température fixée pour la démagnétisation de la pastille 2, la lame 5 agit sur l'aimant 6 pour le déplacer, de telle sorte que les contacts 4a et 5a se séparent. Dans ces conditions, le circuit d'alimentation est coupé.If this is the case, there is an increase in the ambient temperature. When we reach fifty degrees C, the pad 2 'ceases to be magnetic, so that the magnet 6' moves under the effect of the reaction of the elastic blade 14. The displacement of the plunger 7 'leads that of the magnet 6', so that the contacts 13a and 14a come to lie one on the other. In this position, the signaling circuit 11 is closed as well as the main supply circuit 12, so that the device can continue to heat. When it reaches the temperature set for the demagnetization of the pellet 2, the blade 5 acts on the magnet 6 to move it, so that the contacts 4 a and 5 a separate. Under these conditions, the supply circuit is cut.

Lorsque l'alimentation de l'appareil est ensuite coupée volontairement par l'utilisateur, la température redescend, les contacts 4a, 5a se ferment et l'aimant 6 vient à nouveau en contact avec la pastille 2. Lorsque la température atteint 50 à 60°C, la pastille 2' attire l'aimant 6', de telle sorte que le plongeur 7' est déplacé, si bien que la lame 14 est déformée et que les contacts 13a et 14a se séparent.When the power supply to the device is then cut off voluntarily by the user, the temperature drops, the contacts 4 a , 5 a close and the magnet 6 again comes into contact with the pad 2. When the temperature reaches 50 at 60 ° C, the pad 2 'attracts the magnet 6', so that the plunger 7 'is moved, so that the blade 14 is deformed and that the contacts 13 a and 14 a separate.

On notera que le limiteur décrit précédemment est appelé à fonctionner à haute température, c'est-à-dire dans un milieu de 500°C à 600°C pour le tube 1, 1' et 250°C pour le boîtier 3 et plus particulièrement la partie contenant les contacts 4a, 5a, 13a, 14a, ce qui oblige à choisir des matériaux très spécifiques pour résister à l'ensemble des contraintes.It will be noted that the limiter described above is called to operate at high temperature, that is to say in an environment of 500 ° C to 600 ° C for the tube 1, 1 'and 250 ° C for the housing 3 and more particularly the part containing the contacts 4 a, 5 a, 13 a, 14 a, forcing choosing very specific materials to resist all stresses.

On constate que le limiteur est entièrement automatique, c'est-à-dire sans réarmement manuel comme ceux de l'art antérieur.It is found that the limiter is fully automatic, that is to say without manual reset like those of the prior art.

Il va de soi que les matériaux utilisés dans le limiteur de fig. 3 sont identiques à ceux préconisés pour celui de fig. 1 et 2.It goes without saying that the materials used in the limiter of FIG. 3 are identical to those recommended for that of FIG. 1 and 2.

Claims (12)

Limiteur de température du genre comportant un tube renfermant une pastille en alliage à perméabilité magnétique limitée par son point de Curie coopérant avec un équipage mobile chargé élastiquement en combinaison avec un aimant susceptible de commander l'ouverture de contacts d'un circuit électrique principal, caractérisé en ce qu'il comporte un boîtier en céramique (3) communiquant avec au moins un tube (1, 1') en céramique qui comprend une pastille (2, 2') en alliage à température de Curie déterminée, un aimant (6, 6') solidaire d'un plongeur (7, 7') comportant des moyens de réglage pour la récupération des jeux fonctionnels, lesdits moyens coopérant à l'intérieur du boîtier (3) avec une lame élastique (5, 14) contrainte de manière à jouer le rôle d'un ressort de rappel pour exercer une force de pression susceptible de commander l'ouverture et la fermeture des contacts (4a, 5a ; 14a, 13a).Temperature limiter of the kind comprising a tube enclosing an alloy pellet with magnetic permeability limited by its Curie point cooperating with a mobile assembly loaded elastically in combination with a magnet capable of controlling the opening of contacts of a main electrical circuit, characterized in that it comprises a ceramic casing (3) communicating with at least one ceramic tube (1, 1 ') which comprises a pellet (2, 2') of alloy with a determined Curie temperature, a magnet (6, 6 ') integral with a plunger (7, 7') comprising adjustment means for recovering the functional clearances, said means cooperating inside the housing (3) with an elastic blade (5, 14) so constrained playing the role of a return spring to exert a pressure force capable of controlling the opening and closing of the contacts (4 a , 5 a ; 14 a , 13 a ). Limiteur de température suivant la revendication 1, caractérisé en ce que le plongeur (7, 7') comporte un alésage (7a, 7'a) et une vis de serrage (7b, 7'b) pour le coulissement et le blocage d'une tige (8, 8').Temperature limiter according to claim 1, characterized in that the plunger (7, 7 ') has a bore (7 a , 7' a ) and a clamping screw (7 b , 7 ' b ) for sliding and blocking a rod (8, 8 '). Limiteur de température suivant la revendication 2, caractérisé en ce que la tige (8, 8') comprend une tête (8a, 8'a) qui est reliée à la lame élastique (5, 14) pour commander l'ouverture et la fermeture des contacts (4a, 5a ; 14a, 13a).Temperature limiter according to claim 2, characterized in that the rod (8, 8 ') comprises a head (8 a , 8' a ) which is connected to the elastic blade (5, 14) to control the opening and the contact closure (4 a , 5 a ; 14 a , 13 a ). Limiteur de température suivant la revendication 1, caractérisé en ce que l'aimant (6, 6') est réalisé dans une matière comprenant de l'aliminium, du nickel et du cobalt de manière à garder toutes ses propriétés magnétiques à de hautes températures.Temperature limiter according to claim 1, characterized in that the magnet (6, 6 ') is made of a material comprising aluminum, nickel and cobalt so as to keep all of its magnetic properties at high temperatures. Limiteur de température suivant la revendication 1, caractérisé en ce que la lame élastique (5, 14) est réalisée dans un alliage du genre NICKELBERYLLIUM, pour assurer d'une part le rappel élastique de l'aimant (6, 6') et d'autre part le passage du courant.Temperature limiter according to claim 1, characterized in that the elastic blade (5, 14) is made of an alloy of the NICKELBERYLLIUM type, to ensure on the one hand the elastic return of the magnet (6, 6 ') and d on the other hand the passage of the current. Limiteur de température suivant la revendication 1, caractérisé en ce que la température de Curie du plongeur (7, 7') est supérieure à celle de la pastille (2, 2').Temperature limiter according to claim 1, characterized in that the Curie temperature of the plunger (7, 7 ') is higher than that of the pellet (2, 2'). Limiteur de température suivant la revendication 1, caractérisé en ce que la tige de réglage (8, 8') est réalisée en une matière telle que de la céramique ou du métal.Temperature limiter according to claim 1, characterized in that the adjustment rod (8, 8 ') is made of a material such as ceramic or metal. Limiteur de température suivant la revendication 1, caractérisé en ce que l'aimant (6, 6') est solidaire du plongeur (7, 7') soit par collage, soit par magnétisme, soit par soudage.Temperature limiter according to claim 1, characterized in that the magnet (6, 6 ') is integral with the plunger (7, 7') either by gluing, or by magnetism, or by welding. Limiteur de température suivant la revendication 1, caractérisé en ce qu'il est associé à un foyer de cuisson halogène et/ou radiant.Temperature limiter according to claim 1, characterized in that it is associated with a halogen and / or radiant cooking hearth. Limiteur de température suivant la revendication 1, caractérisé en ce qu'il comprend un second tube (1') parallèle et identique au premier (1) pour commander respectivement l'ouverture et la fermeture d'un circuit de signalisation (11) et d'un circuit principal (12)Temperature limiter according to claim 1, characterized in that it comprises a second tube (1 ') parallel and identical to the first (1) for controlling respectively the opening and closing of a signaling circuit (11) and d '' a main circuit (12) Limiteur de température suivant la revendication 10, caractérisé en ce que le tube (1') comprend une pastille (2') présentant un point de Curie différent de celui de la pastille (2) du tube (1).Temperature limiter according to claim 10, characterized in that the tube (1 ') comprises a pellet (2') having a Curie point different from that of the pellet (2) of the tube (1). Limiteur de température suivant la revendication 11, caractérisé en ce que la pastille (2') permet de commander l'ouverture et la fermeture du circuit de signalisation (11) afin qu'il soit ouvert dans la plage de températures comprises entre 0 et 50 à 60°C et fermé entre ces dernières et la température d'ouverture du circuit principal (12).Temperature limiter according to claim 11, characterized in that the pad (2 ') makes it possible to control the opening and closing of the signaling circuit (11) so that it is open in the temperature range between 0 and 50 at 60 ° C and closed between these and the opening temperature of the main circuit (12).
EP95420006A 1994-01-14 1995-01-13 Temperature limiter Expired - Lifetime EP0663678B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR9400564A FR2715245B1 (en) 1994-01-14 1994-01-14 Temperature limiter in particular for cooking hearth.
FR9400564 1994-01-14
FR9407342 1994-06-10
FR9407342A FR2715246B1 (en) 1994-01-14 1994-06-10 Temperature limiter in particular for cooking hearth.

Publications (2)

Publication Number Publication Date
EP0663678A1 true EP0663678A1 (en) 1995-07-19
EP0663678B1 EP0663678B1 (en) 1999-06-16

Family

ID=26230903

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95420006A Expired - Lifetime EP0663678B1 (en) 1994-01-14 1995-01-13 Temperature limiter

Country Status (5)

Country Link
US (1) US5578982A (en)
EP (1) EP0663678B1 (en)
AT (1) ATE181456T1 (en)
DE (1) DE69510241T2 (en)
FR (1) FR2715246B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19814985A1 (en) * 1998-04-03 1999-10-07 Ego Elektro Geraetebau Gmbh Heat display switching device e.g. for ceramic cooking hob
JP2000285776A (en) * 1999-03-31 2000-10-13 Sanyo Electric Co Ltd Thermostat and pack battery containing the thermostat
US20070057752A1 (en) * 2005-09-15 2007-03-15 Youfa Wang Heat actuated magnetic latching microswitch
CN103107045B (en) * 2013-01-23 2016-04-13 佛山市川东磁电股份有限公司 A kind of micro temperature-sensitive magnetic control switch easy to assembly

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2794100A (en) * 1955-08-16 1957-05-28 Wilhelm Baier Kg Thermal relay
FR1308737A (en) * 1961-09-29 1962-11-09 Comp Generale Electricite Thermo-magnetic relay
FR2219572A2 (en) * 1969-09-08 1974-09-20 Seim
GB2017411A (en) * 1978-03-22 1979-10-03 Danfoss As A thermostat having magnetically- operable moving parts
DE3543562A1 (en) * 1985-12-10 1987-06-11 Hella Kg Hueck & Co Overheating safeguard for heating devices

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1204872A (en) * 1958-10-14 1960-01-28 Fr Chauvin Arnoux Soc Alarm device for heat engines
DE1939214U (en) * 1962-11-24 1966-05-26 Continental Elektro Ind Ag ADJUSTABLE TEMPERATURE CONTROLLER, ESPECIALLY FOR ELECTRIC COOKING PLATES.
US4288770A (en) * 1979-11-28 1981-09-08 General Electric Company Thermal override for static trip circuit breakers
US4878038A (en) * 1987-12-07 1989-10-31 Tsai James T Circuit protection device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2794100A (en) * 1955-08-16 1957-05-28 Wilhelm Baier Kg Thermal relay
FR1308737A (en) * 1961-09-29 1962-11-09 Comp Generale Electricite Thermo-magnetic relay
FR2219572A2 (en) * 1969-09-08 1974-09-20 Seim
GB2017411A (en) * 1978-03-22 1979-10-03 Danfoss As A thermostat having magnetically- operable moving parts
DE3543562A1 (en) * 1985-12-10 1987-06-11 Hella Kg Hueck & Co Overheating safeguard for heating devices

Also Published As

Publication number Publication date
DE69510241T2 (en) 1999-12-09
ATE181456T1 (en) 1999-07-15
EP0663678B1 (en) 1999-06-16
FR2715246B1 (en) 1998-02-06
FR2715246A1 (en) 1995-07-21
DE69510241D1 (en) 1999-07-22
US5578982A (en) 1996-11-26

Similar Documents

Publication Publication Date Title
FR2786924A1 (en) THERMAL FUSE
FR2632771A1 (en) LOW VOLTAGE LIMITER CIRCUIT BREAKER WITH WATERPROOF CUTTING CHAMBER
FR2548825A1 (en) DEVICE FOR INDICATING HEAT AND FOR REGULATING OR LIMITING THE TEMPERATURE OF A HEATING BODY BY RADIATION OR BY CONTACT OF ELECTRIC COOKING APPLIANCES
FR2848353A1 (en) Protection against overvoltages for protection of electrical transmission or machines against lightning, uses bimetallic strip adjacent to overvoltage varistor device to release contactor when temperature is to high
EP0663678B1 (en) Temperature limiter
EP0495720B1 (en) Cigarette lighter, especially for motor vehicles
EP0117788B1 (en) Magneto-thermal device for overcurrent relay
FR2527884A1 (en) THERMOSTAT
FR2521770A1 (en) Fast-acting thermal cut=out for heating appliance - has fusible solder plug which causes two contacts to separate when its melting temp. is reached
FR2715245A1 (en) Temperature limiter for cooker hob plate
EP0206868A1 (en) Thermal circuit interrupter
EP0302770B1 (en) Thermal contacts with a snap disc
EP0926694B1 (en) Magnetothermal control device and a circuit breaker equiped with such a device
EP1187159B1 (en) Circuit breker with magnetothermal trip unit
EP3035363B1 (en) Arc extinguishing chamber for electrical circuit breaker and circuit breaker comprising such a chamber
EP0881653B1 (en) Fuse-holder device such as a well fuse for electrical apparatus
FR2982705A1 (en) DEVICE FOR PROTECTING AN ELECTRICAL CIRCUIT POWERED BY AN INTEGRABLE ALTERNATING CURRENT IN A CONTACTOR.
EP0268508B1 (en) Flat bimetal circuit breaker
FR2827077A1 (en) Excess current electrical motor/transformer protection having fusible circuit breaker polymer current limiter fusible ring connected outer tubing and spring removing contact when fuse operates.
FR2505085A1 (en) Temp. sensitive electric switch - using cure point for predetermined switching levels
EP0743666A1 (en) Control thermostat comprising probe with security means
EP1766647A1 (en) Control thermostat provided with a holding device
FR2620265A1 (en) MAGNETIC TRIGGER ASSEMBLY FOR CIRCUIT BREAKER
US2590605A (en) Series lamp cutout
EP0037295B1 (en) High-speed circuit breaker provided with a shock-proof device

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE FR GB IT

17P Request for examination filed

Effective date: 19950904

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 19981116

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

ITF It: translation for a ep patent filed

Owner name: FIAMMENGHI - DOMENIGHETTI

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR GB IT

REF Corresponds to:

Ref document number: 181456

Country of ref document: AT

Date of ref document: 19990715

Kind code of ref document: T

REF Corresponds to:

Ref document number: 69510241

Country of ref document: DE

Date of ref document: 19990722

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19990901

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20001129

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20001218

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20010105

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20010116

Year of fee payment: 7

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020113

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020113

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020801

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20020113

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020930

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050113