EP0225277A1 - Electric contact device for clocks - Google Patents

Electric contact device for clocks Download PDF

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Publication number
EP0225277A1
EP0225277A1 EP86810423A EP86810423A EP0225277A1 EP 0225277 A1 EP0225277 A1 EP 0225277A1 EP 86810423 A EP86810423 A EP 86810423A EP 86810423 A EP86810423 A EP 86810423A EP 0225277 A1 EP0225277 A1 EP 0225277A1
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EP
European Patent Office
Prior art keywords
blade
contact
branches
disc
switch according
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Granted
Application number
EP86810423A
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German (de)
French (fr)
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EP0225277B1 (en
Inventor
Norbert Perucchi
Manfred Pekari
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Individual
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Individual
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/001—Electromechanical switches for setting or display
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C21/00—Producing acoustic time signals by electrical means
    • G04C21/16—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times
    • G04C21/20—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times by closing a contact to ring an electromechanical alarm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/54—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
    • H01H19/56—Angularly-movable actuating part carrying contacts, e.g. drum switch
    • H01H19/58—Angularly-movable actuating part carrying contacts, e.g. drum switch having only axial contact pressure, e.g. disc switch, wafer switch
    • H01H19/585—Angularly-movable actuating part carrying contacts, e.g. drum switch having only axial contact pressure, e.g. disc switch, wafer switch provided with printed circuit contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/016—Application timepiece

Definitions

  • the object of the present invention is to produce a particularly thin electrical switch which does not create disturbing torques on its axis and which is particularly intended for controlling time functions. This object is achieved according to the characterizing part of claim 1.
  • Each switch has a contact blade 1 having two branches 1a and 1b, the two branches being provided at their ends with a contact 2.
  • the blade 1 has a hole in the center, and its central part is embedded between a mobile 3 having a toothing 4 and a barrel 5.
  • the parts 1 - 5 are mounted at a predetermined distance relative to a metal disc 6 illustrated diagrammatically in FIG. 3 covered with a disc of insulating material 7 inside, with the exception of an island 8 which extends radially inwards. It is clearly visible especially in fig.
  • the contact 2a is likely to come into contact with the conductive island 8 of the disc 6, while the contact 2b is always located on the insulating part 7.
  • the switch is therefore closed when the contact 2a slides on the island 8 during the rotation of the contact blade 1 with the mobile 3 which is for example the hour wheel.
  • Fig. 2 shows the shape of the contact blade 1 without external load, that is to say before mounting.
  • Fig. 3 shows the position and shape of the contact blade after assembly of the device.
  • FIGS. 5 and 6 differs from the embodiment according to FIGS. 1 to 3 by the fact that the section of the contact blade 1 is weakened at the location of the embedding of his arms through holes 9a resp. 9b. It is accepted that the almost circular central part of the contact blade 1 is practically rigid and that the elastic deformation of the contact blade in its assembled state is practically limited to the arms. It is clear from fig. 5 that the hole 9a in the longer arm 1a is smaller than the hole 9b in the arm 1b. That is to say that the weakening of the section respectively of the moment of inertia of the blade 1a is less than the weakening of the blade 2b.
  • the solution illustrated can be provided by the introduction of a shorter blade, the friction path of which passes outside the contact 8. If the two blades have, apart from their length, all the other identical characteristics, the shorter will exert, for the same deformation, a different bearing force than that of the longer. There is therefore partial compensation and the problem mentioned above is only slightly or not improved.
  • a solution valid only in a well-defined case, can be found by arranging blades of identical section in such a way that, for the nominal working conditions, the respective arrows f are different, the couples c being, themselves, identical.
  • Fig. 3 shows the contact spring of FIGS. 1 and 2 in its working position. It is noted that, due to the deformation due to the reinforcement, the points of contact with the disc may not be those which have been provided.
  • the application of formula 1 above makes it possible to theoretically trace the shapes of the deformed blades and to be convinced that, especially in the case of small thicknesses, the fulcrum can vary greatly, for small differences in total height.
  • a weakening in a given zone causes, as one can be convinced by applying formula 2, greater deformation in this zone. This deformation is all the greater as the weakening is carried out at the places where the stress is greater, the maximum being achieved for a weakening during the embedding.
  • the branch section weakening or shrinking can be achieved by other measures.

Abstract

L'interrupteur comprend une lame élastique de contact (1) montée sur un élément (3,5) susceptible de tourner autour d'un axe (A). La lame de contact présente deux bras (1a,1b) qui s'étendent radialement d'une partie centrale rigide ou encastrée. Les extrémités extérieures des bras (1a,1b) s'appuyent sur un élément de contact (6,7), les bras étant élastiquement déformés sous l'action des forces de contact. Les deux bras ont une longueur différente et ils sont affaiblis d'une manière différente par des trous (9a,9b) à l'endroit de leur encastrement. De cette manière il est possible d'achever une compensation idéale des couples produits par les forces de contact. En plus on obtient une déformation idéale des bras de la lame de contact et une position bien déterminée des points d'appui des contacts (2a,2b).

Figure imgaf001
The switch comprises an elastic contact blade (1) mounted on an element (3,5) capable of rotating around an axis (A). The contact blade has two arms (1a, 1b) which extend radially from a rigid or embedded central part. The outer ends of the arms (1a, 1b) are supported on a contact element (6,7), the arms being elastically deformed under the action of contact forces. The two arms have a different length and they are weakened in a different way by holes (9a, 9b) at the place of their embedding. In this way it is possible to complete an ideal compensation for the torques produced by the contact forces. In addition, an ideal deformation of the arms of the contact blade and a well-defined position of the contact support points (2a, 2b) are obtained.
Figure imgaf001

Description

La réalisation d'interrupteurs électriques commandés par un appareil miniaturisé, montre-bracelet en particulier, pose certains problèmes, de frottement, énergétique et de dimensionnement en particulier. Une réalisation clas­sique et plate par une lame (droite ou en spirale) est simple mais insuffisante en fiabilité parce qu'étant créatrice de couples et de frottements parasites et provoquant une consommation d'énergie prohibitive vis-à-vis des sources d'énergie à disposition (pile).The production of electrical switches controlled by a miniaturized device, a wristwatch in particular, poses certain problems, in terms of friction, energy and sizing in particular. A conventional and flat realization by a blade (straight or spiral) is simple but insufficient in reliability because being creator of couples and parasitic friction and causing a prohibitive energy consumption with respect to the energy sources to disposal (stack).

On connait déjà des interrupteurs électriques selon le préambule de la revendication 1. Cependant les interrup­teurs connus de ce type ne donnent pas entièrement satisfaction pour des raisons qui seront expliquées ci-dessous.Electric switches are already known according to the preamble of claim 1. However, known switches of this type are not entirely satisfactory for reasons which will be explained below.

La présente invention a pour but la réalisation d'un interrupteur électrique particulièrement mince ne créant pas de couples perturbateurs sur son axe et destiné par­ticulièrement à la commande de fonctions horaires. Ce but est atteint selon la partie caractérisante de la revendication 1.The object of the present invention is to produce a particularly thin electrical switch which does not create disturbing torques on its axis and which is particularly intended for controlling time functions. This object is achieved according to the characterizing part of claim 1.

L'invention sera expliquée en détail ci-après à l'aide des dessins dans lesquels

  • les fig. 1 à 3 représentent un interrupteur de réalisa­tion connue, et ces figures servent à expliquer les in­convénients d'un tel interrupteur,
  • la fig. 4 est un diagramme servant à expliquer les phé­nomènes de déformation des bras de la lame de contact et
  • les fig. 5 et 6 sont des figures correspondantes aux fig. 1 et 3, mais qui représentent, à titre d'exemple, une forme d'exécution selon l'invention.
The invention will be explained in detail below with the aid of the drawings in which
  • fig. 1 to 3 represent a switch of known embodiment, and these figures serve to explain the drawbacks of such a switch,
  • fig. 4 is a diagram used to explain the phenomena of deformation of the arms of the contact blade and
  • fig. 5 and 6 are figures corresponding to FIGS. 1 and 3, but which represent, for example, an embodiment according to the invention.

Les éléments des interrupteurs représentés dans les fig. 1 à 3, respectivement les fig. 5 et 6 sont désignées par les mèmes chiffres de référence. Chaque interrupteur présente une lame de contact 1 ayant deux branches 1a et 1b, les deux branches étant munies à leurs extrémités d'un contact 2. La lame 1 présente un trou au centre, et sa partie centrale est encastrée entre un mobile 3 pré­sentant une denture 4 et un canon 5. Dans l'état assem­blé de l'appareil, par exemple de la montre-bracelet électronique, les parties 1 - 5 sont montées à une distance prédéterminée par rapport à un disque mé­tallique 6 illustré schématiquement dans la fig. 3 recouverte d'un disque en matière isolante 7 à l'inté­rieur, à l'exception d'un îlot 8 qui s'étend radialement vers l'intérieur. Il est clairement visible surtout de la fig. 1 que le bras 1a est plus long que le bras 1b c'est-à-dire que l'élongation du contact 2a de l'axe A de l'interrupteur est plus grande que la distance du contact 2b. C'est ainsi que le contact 2a est suscepti­ble d'entrer en contact avec l'îlot conducteur 8 du disque 6, tandis que le contact 2b se trouve toujours sur la partie isolante 7. L'interrupteur est donc fermé lorsque le contact 2a glisse sur l'îlot 8 lors de la rotation de la lame de contact 1 avec le mobile 3 qui est par exemple la roue des heures.The elements of the switches shown in fig. 1 to 3, respectively fig. 5 and 6 are designated by the same reference numerals. Each switch has a contact blade 1 having two branches 1a and 1b, the two branches being provided at their ends with a contact 2. The blade 1 has a hole in the center, and its central part is embedded between a mobile 3 having a toothing 4 and a barrel 5. In the assembled state of the apparatus, for example of the electronic wristwatch, the parts 1 - 5 are mounted at a predetermined distance relative to a metal disc 6 illustrated diagrammatically in FIG. 3 covered with a disc of insulating material 7 inside, with the exception of an island 8 which extends radially inwards. It is clearly visible especially in fig. 1 that the arm 1a is longer than the arm 1b, that is to say that the elongation of the contact 2a of the axis A of the switch is greater than the distance of the contact 2b. Thus the contact 2a is likely to come into contact with the conductive island 8 of the disc 6, while the contact 2b is always located on the insulating part 7. The switch is therefore closed when the contact 2a slides on the island 8 during the rotation of the contact blade 1 with the mobile 3 which is for example the hour wheel.

La fig. 2 représente la forme de la lame de contact 1 sans charge extérieur, c'est-à-dire avant le montage. La fig. 3 représente la position et la forme de la lame de contact après assemblage de l'appareil.Fig. 2 shows the shape of the contact blade 1 without external load, that is to say before mounting. Fig. 3 shows the position and shape of the contact blade after assembly of the device.

La forme d'exécution selon l'invention, représentée sur les fig. 5 et 6 se distingue de la réalisation selon les fig. 1 à 3 par le fait que la section de la lame de contact 1 est affaiblie à l'endroit de l'encastrement de ses bras par des trous 9a resp. 9b. Il est admis que la partie centrale quasi circulaire de la lame de contact 1 soit pratiquement rigide et que la déformation elastique de la lame de contact dans son état assemblé se limite pratiquement aux bras. Il ressort clairement de la fig. 5 que le trou 9a du bras 1a plus long est plus petit que le trou 9b dans le bras 1b. C'est-à-dire que l'af­faiblissement de la section respectivement du moment d'inertie de la lame 1a est inférieure à l'affaiblisse­ment de la lame 2b.The embodiment according to the invention, shown in FIGS. 5 and 6 differs from the embodiment according to FIGS. 1 to 3 by the fact that the section of the contact blade 1 is weakened at the location of the embedding of his arms through holes 9a resp. 9b. It is accepted that the almost circular central part of the contact blade 1 is practically rigid and that the elastic deformation of the contact blade in its assembled state is practically limited to the arms. It is clear from fig. 5 that the hole 9a in the longer arm 1a is smaller than the hole 9b in the arm 1b. That is to say that the weakening of the section respectively of the moment of inertia of the blade 1a is less than the weakening of the blade 2b.

On expliquera et comparera les phénomènes de déforma­tion des lames de contact représentées à l'aide de la fig. 4.We will explain and compare the deformation phenomena of the contact blades shown using fig. 4.

Lorsqu'une lame encastrée à une extrémité est sollicitée à l'autre, les formules élémentaires de la résistance des matériaux permettent de calculer en fonction de la sollicitation P:
- la forme de la lame fléchie par la formule

Figure imgb0001
- la flexion maximum à l'extrémité x =
Figure imgb0002
 When a blade embedded at one end is stressed at the other, the elementary formulas of the resistance of the materials make it possible to calculate as a function of the stress P:
- the shape of the blade bent by the formula
Figure imgb0001
 - maximum bending at the end x =
Figure imgb0002

On constate donc que, toutes autres caractéristiques égales, pour une flèche f identique une lame courte devra être sollicitée plus fortement qu'une lame longue.It is therefore found that, all other characteristics being equal, for an identical deflection f a short blade will have to be stressed more strongly than a long blade.

Il est évident que, sous l'action de la force P d'appui de la lame, il se crée sur les deux pièces (mobile et disque) un couple C, sollicitant ces mobiles dans le plan de leur axe, qui peut être la cause de mauvais f onctionnements. Afin d'éliminer cet inconvénient, il paraît judicieux de rendre le dispositif symétrique en compensant le couple C par un autre couple antagoniste, dû à une lame opposée.It is obvious that, under the action of the force P of support of the blade, a couple C is created on the two parts (mobile and disc), urging these mobile in the plane of their axis, which can be the because of malfunctions. In order to eliminate this drawback, it seems advisable to make the device symmetrical by compensating for the torque C with another opposing torque, due to an opposite blade.

Dans le but de ne pas doubler le nombre de contacts par tour et afin de ne pas devoir isoler la deuxième lame, la solution illustré peut être apportée par l'introduc­tion d'une lame plus courte, dont le chemin de frotte­ment passe en dehors du contact 8. Si les deux lames ont, à part leur longueur, toutes les autres caracté­ristiques identiques, la plus courte exercera, pour une même déformation, une force d'appui différente que celle de la plus longue. Il y a donc compensation partielle et le problème mentionné ci-dessus n'est que peu ou pas amélioré.In order not to double the number of contacts per revolution and so as not to have to isolate the second blade, the solution illustrated can be provided by the introduction of a shorter blade, the friction path of which passes outside the contact 8. If the two blades have, apart from their length, all the other identical characteristics, the shorter will exert, for the same deformation, a different bearing force than that of the longer. There is therefore partial compensation and the problem mentioned above is only slightly or not improved.

Une solution, valable uniquement dans un cas bien défi­ni, peut être trouvée en agençant des lames de section identique de telle façon que, pour les conditions nomi­nales de travail les flèches f respectives soient diffé­rentes, les couples c étant, eux, identiques.A solution, valid only in a well-defined case, can be found by arranging blades of identical section in such a way that, for the nominal working conditions, the respective arrows f are different, the couples c being, themselves, identical.

Cette solution ne résoud le problème que dans le cas particulier des conditions d'emploi nominales car si, de par les tolérances de fabrication, la distance mobile-­disque venait à changer, les forces d'appui P varie­raient différemment.This solution only solves the problem in the particular case of nominal conditions of use because if, by manufacturing tolerances, the mobile-disc distance were to change, the support forces P would vary differently.

La solution idéale apportant par ailleurs un autre avantage non négligeable, comme on le verra ci-dessous, consiste à affaiblir les deux lames de façon différente aux endroits où la sollicitation, donc la déformation, est maximum.The ideal solution bringing in addition another non-negligible advantage, as will be seen below, consists in weakening the two blades differently in the places where the stress, therefore the deformation, is maximum.

La Fig. 3 représente le ressort de contact des Fig. 1 et 2 dans sa position de travail. On constate que, du fait de la déformation due à l'armage, les points de contact avec le disque peuvent ne pas être ceux qui ont été pré­vus. L'application de la formule 1 ci-dessus permet de tracer théoriquement les formes des lames déformées et de se convaincre que, dans le cas de faibles épaisseurs surtout, le point d'appui peut varier fortement, pour de petites différences de hauteur totale.Fig. 3 shows the contact spring of FIGS. 1 and 2 in its working position. It is noted that, due to the deformation due to the reinforcement, the points of contact with the disc may not be those which have been provided. The application of formula 1 above makes it possible to theoretically trace the shapes of the deformed blades and to be convinced that, especially in the case of small thicknesses, the fulcrum can vary greatly, for small differences in total height.

Un affaiblissement dans une zone donnée provoque, comme on peut s'en convaincre en appliquant la formule 2, une déformation plus grande dans cette zone. Cette déforma­tion est d'autant plus grande que l'affaiblissement est réalisé aux endroits où la sollicitation est plus gran­de, le maximum étant réalisé pour un affaiblissement à l'encastrement.A weakening in a given zone causes, as one can be convinced by applying formula 2, greater deformation in this zone. This deformation is all the greater as the weakening is carried out at the places where the stress is greater, the maximum being achieved for a weakening during the embedding.

Il est donc possible de réaliser un ressort de contact (fig. 5 et 6) dont les deux lames sont affaiblies différemment dans les zones d'encastrement respectives, par exemple par deux trous de diamètre différent comme représenté sur la fig. 4. Ces affaiblissements sont dimensionnés à l'aide des formules 1 et 2, d'une part de façon telle que la presque totalité de la déformation se produise dans ces zones. Le point d'appui reste ainsi parfaitement défini quelle que soit la déformation, comme représenté sur la fig. 6.It is therefore possible to produce a contact spring (fig. 5 and 6), the two blades of which are weakened differently in the respective embedding zones, for example by two holes of different diameter as shown in fig. 4. These attenuations are dimensioned using formulas 1 and 2, on the one hand in such a way that almost all of the deformation occurs in these zones. The fulcrum thus remains perfectly defined whatever the deformation, as shown in FIG. 6.

D'autre part, en dimensionnant ces affaiblissements de façon judicieusement différente, on peut réaliser l'égalité des forces d'appui ou compenser les couples parasites.On the other hand, by dimensioning these attenuations in a judiciously different way, one can achieve equal support forces or compensate for stray couples.

Il va de soi que l'affaiblissement doit être calculé de manière que les tensions maximum admissibles par le ma­tériau constituant les lames ne soient pas dépassées.It goes without saying that the attenuation must be calculated so that the maximum allowable voltages by the material of which the blades are made are not exceeded.

Il existe plusieurs variantes possibles de la forme d'exécution représentée. On pourrait prévoir une lame de contact avec plus que deux bras mais symmétrique dans ce sens qu'une compensation totale des couples agissant sur l'axe est obtenue. L'affaiblissement ou retrécissement de section des branches peut être réalisé pas d'autres mesures. On peut, par exemple, affaiblir les bras par des encoches extérieures symmétriques. Au lieu de trous circulaires on peut avantageusement prévoir des trous oblongs situés sensiblement au milieu de la largeur des branches. Il est également possible de prévoir des rétrécissements par réduction de l'épaisseur de la lame au voisinage des encastrement.There are several possible variants of the embodiment shown. One could provide a contact blade with more than two arms but symmetrical in the sense that a total compensation of the couples acting on the axis is obtained. The branch section weakening or shrinking can be achieved by other measures. One can, for example, weaken the arms by symmetrical external notches. Instead of circular holes, it is advantageous to provide oblong holes situated substantially in the middle of the width of the branches. It is also possible to provide for narrowing by reducing the thickness of the blade in the vicinity of the embedding.

L'invention n'est pas obligatoirement limitée à la définition donnée dans les revendications. N'importe quelle combinaison d'éléments de la forme d'exécution représentée et des variantes mentionnées peuvent être considérées comme étant l'invention.The invention is not necessarily limited to the definition given in the claims. Any combination of elements of the embodiment shown and variants mentioned may be considered to be the invention.

Claims (6)

1. Interrupteur électrique comportant un contact circu­laire plat et mince susceptible de tourner autour d'un axe, formé d'un disque (6) partiellement isolé et d'au moins une lame (1) faisant patin et appuyé sur ledit disque, cette lame comportant au moins deux branches (1a,1b), appuyant sur le disque à des rayons différents, caractérisé en ce que les branches de la lame ont, au voisinage de leur point d'encastrement, un rétrécisse­ment de section de telle manière que, lorsqu'elles sont en position de travail, leurs profils soient sensible­ment des droites et la résultante des couples tendant à créer des rotations dans des plans contenant l'axe (A) soit sensiblement nulle.1. Electric switch comprising a flat and thin circular contact capable of rotating around an axis, formed of a disc (6) partially isolated and of at least one blade (1) forming a pad and pressed on said disc, this blade comprising at least two branches (1a, 1b), pressing on the disc at different radii, characterized in that the branches of the blade have, in the vicinity of their embedding point, a narrowing of section so that, when 'they are in the working position, their profiles are substantially straight and the result of the couples tending to create rotations in planes containing the axis (A) is substantially zero. 2. Interrupteur selon la revendication 1, caractérisé en ce que les rétrécissements de section des branches (1a,1b) sont réalisés par des trous (9a,9b) situés sensiblement au milieu de la largeur des branches.2. Switch according to claim 1, characterized in that the cross-sections of the branches (1a, 1b) are produced by holes (9a, 9b) located substantially in the middle of the width of the branches. 3. Interrupteur selon la revendication 1, caractérisé en ce que les rétrécissements de section des branches sont réalisés par une ouverture oblongue située sensiblement au milieu de la largeur des branches.3. Switch according to claim 1, characterized in that the narrowing of the branches section are made by an oblong opening located substantially in the middle of the width of the branches. 4. Interrupteur selon la revendication 1, caractérisé en ce que les rétrécissements sont réalisés par des réduc­tions de l'épaisseur de la lame au voisinage des enca­strements.4. Switch according to claim 1, characterized in that the narrowing is carried out by reductions in the thickness of the blade in the vicinity of the embedments. 5. Interrupteur selon la revendication 2, caractérisé en ce que lesdites ouvertures (9a,9b) consistent en décou­pures circulaires, celle (9b) du prolongement (1b) ayant un diamètre légèrement supérieur à celui (9a) de la partie (1a) de la lame qui porte le contact (2a).5. Switch according to claim 2, characterized in that said openings (9a, 9b) consist of circular cutouts, that (9b) of the extension (1b) having a diameter slightly greater than that (9a) of the part (1a) of the blade which carries the contact (2a). 6. Utilisation de l'interrupteur selon la revendication 1 dans une montre-bracelet comprenant un dispositif capable d'entrer en action par la fermeture, à une heure réglable à volonté, de cet interrupteur, ledit disque et ladite lame étant tous deux montés rotativement autour du même axe, l'une de ces deux pièces étant solidarisée à un organe indicateur de l'heure d'entrée en action dudit dispositif et l'autre étant solidarisée à la roue à canon des heures de la montre, de façon à être entraî­née en rotation en synchronisme avec cette roue, le disque étant isolé sur le parcours du contact porté par la lame, sauf à l'endroit du contact qu'il porte.6. Use of the switch according to claim 1 in a wristwatch comprising a device capable of entering into action by closing, at an adjustable time at will, this switch, said disc and said blade being both rotatably mounted around the same axis, one of these two parts being secured to a member indicating the time of entry into action of said device and the other being secured to the barrel wheel of the hours of the watch, so as to be driven in rotation in synchronism with this wheel, the disc being isolated on the path of the contact carried by the blade, except at the place of the contact which it carries.
EP86810423A 1985-10-04 1986-09-26 Electric contact device for clocks Expired EP0225277B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4311/85 1985-10-04
CH431185 1985-10-04

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EP0225277A1 true EP0225277A1 (en) 1987-06-10
EP0225277B1 EP0225277B1 (en) 1989-11-23

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EP86810423A Expired EP0225277B1 (en) 1985-10-04 1986-09-26 Electric contact device for clocks

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DE (1) DE3667112D1 (en)
HK (1) HK108390A (en)

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GB456625A (en) * 1935-02-19 1936-11-12 Cinch Mfg Corp Improvements in and relating to electrical switches of the selector type
US3611702A (en) * 1969-05-08 1971-10-12 Paolo Spadini Electric alarm timepiece
JPS5246123Y2 (en) * 1972-06-09 1977-10-20
FR2415328A1 (en) * 1978-01-19 1979-08-17 Gillette Co CLOCKWISE DEVICE WITH ALARM SWITCH

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Also Published As

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EP0225277B1 (en) 1989-11-23
HK108390A (en) 1990-12-28
US4780583A (en) 1988-10-25
DE3667112D1 (en) 1989-12-28

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