EP0843873A1 - Audible warning device with a built-in interference suppressing device - Google Patents

Audible warning device with a built-in interference suppressing device

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Publication number
EP0843873A1
EP0843873A1 EP96926460A EP96926460A EP0843873A1 EP 0843873 A1 EP0843873 A1 EP 0843873A1 EP 96926460 A EP96926460 A EP 96926460A EP 96926460 A EP96926460 A EP 96926460A EP 0843873 A1 EP0843873 A1 EP 0843873A1
Authority
EP
European Patent Office
Prior art keywords
breaker
warning device
rivet
audible warning
varistor
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
EP96926460A
Other languages
German (de)
French (fr)
Other versions
EP0843873B1 (en
Inventor
Gilbert Hurst
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.)
Compagnie Europeenne de Composants Electroniques LCC CICE
Original Assignee
Compagnie Europeenne de Composants Electroniques LCC CICE
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 Compagnie Europeenne de Composants Electroniques LCC CICE filed Critical Compagnie Europeenne de Composants Electroniques LCC CICE
Publication of EP0843873A1 publication Critical patent/EP0843873A1/en
Application granted granted Critical
Publication of EP0843873B1 publication Critical patent/EP0843873B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
    • G10K9/13—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means
    • G10K9/15—Self-interrupting arrangements

Definitions

  • the present invention relates to audible warning devices, in particular for the equipment of land vehicles.
  • Known horns present on the market, comprise a coil in the air gap from which a plunger core secured to a membrane can move, the vibration of which produces a sound.
  • the electrical supply to the coil takes place via a breaker, the opening and closing of which control the reciprocating movement of the diaphragm.
  • This electric arc renewed at the operating frequency of the horn, provides a very wide spectrum parasitic radio signal. Such a signal may prove harmful to other equipment, in particular electronic equipment, of the vehicle.
  • the object of the present invention is to remedy the above-mentioned drawbacks of known audible warning devices and to this end it proposes to modify these known warning devices which, without complicating the production of the alarm or significantly increasing the cost thereof, makes it possible to avoid any harmful effect of the alarm, during the operation of the latter, on particularly electronic equipment including the carrier vehicle is provided.
  • the audible warning device is of the type comprising, inside a metallic envelope closed by a flexible membrane integral with a plunger core, a coil into which said plunger core can be inserted and a breaker of which the upper and lower arms are insulated so as to come into contact only through their contact parts, the breaker being mounted on said casing by a rivet isolated from the latter.
  • It is characterized by a varistor mounted at the terminals of the switch and whose effect suppresses the parasitic signal generated by the electric arc produced at each opening of the contact parts of the switch.
  • the metallized varistor on each face is mounted on the body of the rivet while being isolated from the latter, and is pressed between the two arms of the breaker, opposite to said contact parts, making contact with each. said arms.
  • the washer forming the varistor is isolated from the rivet, on which it is mounted, by an extension of the carcass of the coil.
  • the invention provides for the stiffening of the upper arm of the breaker so that, during riveting, the pressure of the rivet is applied to the varistor ceramic in a uniform and plane manner (that is to say without cantilever) ).
  • the shoulder presented by the plunger core and intended to engage the lower arm of the contact breaker, to separate the contact parts from the latter carries an insulating washer, preferably forcibly engaged in a throat of the plunger core.
  • the lower arm of the switch is at an electrical potential equal to that of the input pad, while the plunger core is at the electrical potential of the envelope of the horn, c that is to say to the mass of the user vehicle. It is therefore essential, under penalty of short circuit, that the plunger core does not come into electrical contact with the lower arm of the contact breaker.
  • Figure 1 is a partially vertical sectional view of the actuating part of a conventional horn
  • Figure 2 is a view similar to Figure 1, of the actuating portion of an improved horn according to the present invention
  • FIG. 3 is a larger view of a detail of FIG. 2, showing in particular the interrupter of the horn.
  • Figure 1 there is shown the actuating part of a conventional horn.
  • It comprises a metal casing 1 closed at its front part by an elastic metal membrane 2.
  • the metal casing 1 is provided with a fixed core 3 engaged in the center of the carcass 4 with a coil 5.
  • a plunger core 6, integral with the membrane 2, is located opposite the fixed core 3.
  • a breaker 7 comprising an upper arm 8 and a lower arm 9 between which is mounted an insulating part
  • the breaker 7 is fixed by a rivet 13 forming a tongue, which passes through the casing 1, the casing 4, the arm 9, the insulating part 10 and the arm 8, being isolated by an insulating washer 14, from the body mass 1.
  • the tongue of the rivet 13 serves as an input for the electric current.
  • the lower arm 9 of the breaker 7 is in electrical contact with the input wire 15 of the coil 5, but is isolated from the rivet 13.
  • the output wire 16 of the coil 5 is electrically connected, by means of a metal washer 17, to a rivet 18 forming an output tab, which assembles the carcass 4 to the casing 1, an insulating washer 19 insulating the rivet 18 from the mass of the casing 1.
  • a varistor is mounted across the terminals of the breaker 7.
  • This varistor produced in the form of a washer 21 (that is to say a disc provided with a central hole and on the opposite faces of which the electrical contacts are made by simple pressure), is mounted on the rivet 13 between the upper breaker 8 and lower breaker 9 arms by replacing the breaker insulation 10 of the conventional device of FIG. 1.
  • the carcass 4 of the winding 5 then has a centering stud 22 disposed between the rivet 13 and the varistor 21.
  • the shoulder 20 of the plunger core 6 is fitted with an insulating washer 23 forcibly mounted in a groove 24 in the core 6.
  • the lower arm 9 of the breaker 7 is, during certain phases of the operating cycle, at an electrical potential equal to that of the input tab 13.
  • the plunger core 6 is itself at the potential of the casing 1 the mechanical mounting of which on the chassis of the user vehicle will have the effect of fixing the potential to ground, that is to say at least of the battery. It is therefore essential, under penalty of short circuit, that none of the elements of the breaker 7, and in particular the lower arm 9 thereof, is in electrical contact with one of the elements of the metal casing 1 of the horn , including membrane 2 and plunger 6

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Burglar Alarm Systems (AREA)
  • Breakers (AREA)
  • Emergency Alarm Devices (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Fire Alarms (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Alarm Systems (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Catching Or Destruction (AREA)

Abstract

A warning device including a metal housing (1) sealed with a flexible metal membrane (2) secured to a plunger (6). The inside of the housing (1) comprises a coil (5) with an air gap into which the plunger (6) may be inserted, and a breaker (7) having an upper arm (8) and a lower arm (9) with mutually contacting contact portions (11, 12). The breaker is attached to the housing (1) by means of a rivet (13) and a ring-shaped varistor (21) around the rivet is fitted between the arms (8, 9) of the breaker (7). A shoulder on the plunger (6) is engageable with the contact portion (12) of one arm (9) and supports an insulating washer (23). The interfering signal generated by the electric arc whenever the contact portions (11, 12) are opened may thus be controlled. In use, said audible warning device has no adverse effect on the electronic equipment of the vehicle.

Description

Avertisseur sonore à dispositif d' antiparasitage incorporé Buzzer with built-in suppressor
La présente invention concerne les avertisseurs sonores, en particulier pour l'équipement de véhicules terrestres.The present invention relates to audible warning devices, in particular for the equipment of land vehicles.
Les avertisseurs sonores connus, présents sur le marché, comportent une bobine dans l'entrefer de laquelle peut se déplacer un noyau plongeur solidaire d'une membrane dont la vibration produit un son. L'alimentation électrique de la bobine s'effectue par l'intermédiaire d'un rupteur dont l'ouverture et la fermeture commandent le mouvement alternatif de la membrane.Known horns, present on the market, comprise a coil in the air gap from which a plunger core secured to a membrane can move, the vibration of which produces a sound. The electrical supply to the coil takes place via a breaker, the opening and closing of which control the reciprocating movement of the diaphragm.
Ces avertisseurs sonores connus présentent l'inconvénient que, en fonctionnement, chaque ouverture des contacts du rupteur donne lieu à la formation d'un arc électrique entre les grains de contact du rupteur.These known audible warning devices have the drawback that, in operation, each opening of the contactor contacts gives rise to the formation of an electric arc between the contact grains of the contactor.
Cet arc électrique, renouvelé à la fréquence de fonctionnement de l'avertisseur, fournit un signal radioélectrique parasite à très large spectre. Un tel signal peut s'avérer nocif pour d'autres équipements, en particulier électroniques, du véhicule.This electric arc, renewed at the operating frequency of the horn, provides a very wide spectrum parasitic radio signal. Such a signal may prove harmful to other equipment, in particular electronic equipment, of the vehicle.
La présente invention a pour objet de remédier aux inconvénients mentionnés ci-dessus des avertisseurs sonores connus et elle propose à cet effet d'apporter à ces avertisseurs connus une modification qui, sans compliquer la réalisation de l'avertisseur ni augmenter sensiblement le coût de celui-ci, permet d'écarter tout effet nocif de l'avertisseur, lors du fonctionnement de celui-ci, sur les équipements en particulier électroniques dont le véhicule porteur est pourvu.The object of the present invention is to remedy the above-mentioned drawbacks of known audible warning devices and to this end it proposes to modify these known warning devices which, without complicating the production of the alarm or significantly increasing the cost thereof, makes it possible to avoid any harmful effect of the alarm, during the operation of the latter, on particularly electronic equipment including the carrier vehicle is provided.
L'avertisseur sonore selon l'invention est du type comprenant, à l'intérieur d'une enveloppe métallique fermée par une membrane souple solidaire d'un noyau plongeur, une bobine dans laquelle peut s'introduire le dit noyau plongeur et un rupteur dont les bras supérieur et inférieur sont isolés pour ne venir en contact que par leurs parties de contact, le rupteur étant monté sur la dite enveloppe par un rivet isolé de cette dernière. Il se caractérise par une varistance montée aux bornes du rupteur et dont l'effet jugule le signal parasite généré par l'arc électrique produit à chaque ouverture des parties de contact du rupteur. Avantageusement, la varistance métallisée sur chaque face, est montée sur le corps du rivet tout en étant isolée de celui-ci, et est pressée entre les deux bras du rupteur, à l'opposé des dites parties de contact, en faisant contact avec chacun des dits bras. Selon une réalisation préférée la rondelle formant varistance est isolée du rivet, sur lequel elle est montée, par un prolongement de la carcasse de la bobine.The audible warning device according to the invention is of the type comprising, inside a metallic envelope closed by a flexible membrane integral with a plunger core, a coil into which said plunger core can be inserted and a breaker of which the upper and lower arms are insulated so as to come into contact only through their contact parts, the breaker being mounted on said casing by a rivet isolated from the latter. It is characterized by a varistor mounted at the terminals of the switch and whose effect suppresses the parasitic signal generated by the electric arc produced at each opening of the contact parts of the switch. Advantageously, the metallized varistor on each face is mounted on the body of the rivet while being isolated from the latter, and is pressed between the two arms of the breaker, opposite to said contact parts, making contact with each. said arms. According to a preferred embodiment, the washer forming the varistor is isolated from the rivet, on which it is mounted, by an extension of the carcass of the coil.
L'invention prévoit la rigidification du bras supérieur du rupteur de façon que, lors du rivetage, la pression du rivet soit appliquée sur la céramique de la varistance d'une manière uniforme et plane (c'est-à-dire sans porte à faux).The invention provides for the stiffening of the upper arm of the breaker so that, during riveting, the pressure of the rivet is applied to the varistor ceramic in a uniform and plane manner (that is to say without cantilever) ).
Enfin, selon l'invention, l'epaulement présenté par le noyau plongeur et destiné à engager le bras inférieur du rupteur, pour séparer entre elles les parties de contact de celui-ci, porte une rondelle isolante, de préférence engagée à force dans une gorge du noyau plongeur. En effet, durant certaines phases du cycle de fonctionnement, le bras inférieur du rupteur se trouve à un potentiel électrique égal à celui du plot d'entrée, alors que le noyau plongeur est au potentiel électrique de l'enveloppe de l'avertisseur, c'est-à-dire à la masse du véhicule utilisateur. Il est donc indispensable, sous peine de court-circuit, que le noyau plongeur ne vienne pas en contact électrique avec le bras inférieur du rupteur. Pour bien faire comprendre le dispositif selon la présente invention, on en décrira ci-après, à titre d'exemple sans caractère limitatif, une forme deFinally, according to the invention, the shoulder presented by the plunger core and intended to engage the lower arm of the contact breaker, to separate the contact parts from the latter, carries an insulating washer, preferably forcibly engaged in a throat of the plunger core. Indeed, during certain phases of the operating cycle, the lower arm of the switch is at an electrical potential equal to that of the input pad, while the plunger core is at the electrical potential of the envelope of the horn, c that is to say to the mass of the user vehicle. It is therefore essential, under penalty of short circuit, that the plunger core does not come into electrical contact with the lower arm of the contact breaker. To clearly understand the device according to the present invention, there will be described below, by way of non-limiting example, a form of
réalisation préférée en référence au dessin schématique annexé dans lequel : la figure 1 est une vue partiellement en coupe verticale de la partie d' actionnement d'un avertisseur sonore conventionnel ; la figure 2 est une vue analogue à la figure 1 , de la partie d' actionnement d'un avertisseur sonore perfectionné selon la présente invention ; et la figure 3 est à plus grande échelle une vue de détail de la figure 2, montrant en particulier le rupteur de l'avertisseur. En référence à la figure 1 on a représenté la partie d' actionnement d'un avertisseur conventionnel.preferred embodiment with reference to the accompanying schematic drawing in which: Figure 1 is a partially vertical sectional view of the actuating part of a conventional horn; Figure 2 is a view similar to Figure 1, of the actuating portion of an improved horn according to the present invention; and FIG. 3 is a larger view of a detail of FIG. 2, showing in particular the interrupter of the horn. Referring to Figure 1 there is shown the actuating part of a conventional horn.
Elle comprend une enveloppe métallique 1 fermée à sa partie avant par une membrane métallique élastique 2.It comprises a metal casing 1 closed at its front part by an elastic metal membrane 2.
L'enveloppe métallique 1 est munie d'un noyau fixe 3 engagé au centre de la carcasse 4 d'une bobine 5. Un noyau plongeur 6, solidaire de la membrane 2, est situé en regard du noyau fixe 3.The metal casing 1 is provided with a fixed core 3 engaged in the center of the carcass 4 with a coil 5. A plunger core 6, integral with the membrane 2, is located opposite the fixed core 3.
A l'intérieur de l'enveloppe 1 est disposé un rupteur 7 comportant un bras supérieur 8 et un bras inférieur 9 entre lesquels est montée une pièce isolanteInside the casing 1 is disposed a breaker 7 comprising an upper arm 8 and a lower arm 9 between which is mounted an insulating part
10, celle-ci présentant une ouverture au travers de laquelle se rejoignent les parties de contact respectives 11,12 des bras 8,9 du rupteur. La fixation du rupteur 7 s'effectue par un rivet 13 formant languette, qui traverse l'enveloppe 1, la caracasse 4, le bras 9, la pièce isolante 10 et le bras 8, en étant isolé par une rondelle isolante 14, de la masse du boîtier 1. La languette du rivet 13 sert d'entrée pour le courant électrique.10, the latter having an opening through which the respective contact parts 11, 12 of the arms 8, 9 of the contactor meet. The breaker 7 is fixed by a rivet 13 forming a tongue, which passes through the casing 1, the casing 4, the arm 9, the insulating part 10 and the arm 8, being isolated by an insulating washer 14, from the body mass 1. The tongue of the rivet 13 serves as an input for the electric current.
Le bras inférieur 9 du rupteur 7 est en contact électrique avec le fil d'entrée 15 de la bobine 5, mais est isolé du rivet 13. Le fil de sortie 16 de la bobine 5 est relié électriquement, par l'intermédiaire d'une rondelle métallique 17, à un rivet 18 formant languette de sortie, qui assemble la carcasse 4 à l'enveloppe 1, une rondelle isolante 19 isolant le rivet 18 de la masse de l'enveloppe 1.The lower arm 9 of the breaker 7 is in electrical contact with the input wire 15 of the coil 5, but is isolated from the rivet 13. The output wire 16 of the coil 5 is electrically connected, by means of a metal washer 17, to a rivet 18 forming an output tab, which assembles the carcass 4 to the casing 1, an insulating washer 19 insulating the rivet 18 from the mass of the casing 1.
Avec ce dispositif, lorsque l'ensemble est alimenté électriquement entre les bornes 13 et 18, le courant passe dans la bobine 5 et le noyau plongeur 6 est attiré à l'intérieur de la bobine 5. Ce faisant, l'epaulement 20 présenté par le noyau plongeur 6 vient repousser vers l'intérieur l'isolant 10 du rupteur 7 et le bras inférieur 9 de ce rupteur, en provoquant ainsi l'ouverture du circuit électrique. La bobine 5 n'étant plus alimentée, l'attraction magnétique cesse et le noyau plongeur 6 est rappelé, par l'élasticité de la membrane 2, vers sa position de repos. De ce fait le bras inférieur 9 du rupteur reprend sa place et rétablit le courant électrique dans la bobine 5, en recommençant un nouveau cycle.With this device, when the assembly is supplied electrically between the terminals 13 and 18, the current flows through the coil 5 and the plunger core 6 is drawn inside the coil 5. In doing so, the shoulder 20 presented by the plunger core 6 pushes inward the insulator 10 of the switch 7 and the lower arm 9 of this switch, thereby causing the opening of the electrical circuit. Since the coil 5 is no longer supplied, the magnetic attraction ceases and the plunger core 6 is returned, by the elasticity of the membrane 2, to its rest position. Therefore the lower arm 9 of the breaker takes its place and restores the electric current in the coil 5, starting a new cycle.
Un mouvement alternatif est ainsi communiqué à la membrane 2, lequel est mis à profit pour générer un son.An alternating movement is thus communicated to the membrane 2, which is used to generate a sound.
Comme il a été expliqué plus haut, en fonctionnement chaque ouverture des contacts du rupteur donne lieu à la formation d'un arc électrique entre les parties de contact 11,12 du rupteur 7. Cet arc électrique, renouvelé à la fréquence de fonctionnement de l'avertisseur, fournit un signal radioélectrique parasite à très large spectre qui peut s'avérer nocif pour d'autres équipements, en particulier électroniques, du véhicule. Aux figures 2 et 3, on a représenté le dispositif modifié selon l'invention, dans lequel les éléments similaires à ceux du dispositif de la figure 1 ont été désignés par les mêmes numéros de référence.As explained above, in operation each opening of the contacts of the breaker gives rise to the formation of an electric arc between the contact parts 11, 12 of the breaker 7. This electric arc, renewed at the operating frequency of the horn, provides a very broad spectrum interference radio signal which may be harmful to other equipment, in particular electronic, of the vehicle. In Figures 2 and 3, there is shown the modified device according to the invention, in which elements similar to those of the device of Figure 1 have been designated by the same reference numbers.
Selon l'invention, pour juguler le signal parasite généré par l'ouverture des contacts de rupteur, on monte une varistance aux bornes du rupteur 7.According to the invention, to suppress the parasitic signal generated by the opening of the breaker contacts, a varistor is mounted across the terminals of the breaker 7.
Cette varistance, réalisée sous la forme d'une rondelle 21 (c'est-à-dire un disque muni d'un trou central et sur les faces opposées duquel les contacts électriques sont pris par simple pression), est montée sur le rivet 13 entre les bras de rupteur supérieur 8 et inférieur 9 en remplaçant l'isolant du rupteur 10 du dispositif conventionnel de la figure 1. Afin d'isoler la varistance 21 du rivet 13, la carcasse 4 du bobinage 5 présente alors un téton de centrage 22 disposé entre le rivet 13 et la varistance 21.This varistor, produced in the form of a washer 21 (that is to say a disc provided with a central hole and on the opposite faces of which the electrical contacts are made by simple pressure), is mounted on the rivet 13 between the upper breaker 8 and lower breaker 9 arms by replacing the breaker insulation 10 of the conventional device of FIG. 1. In order to isolate the varistor 21 from the rivet 13, the carcass 4 of the winding 5 then has a centering stud 22 disposed between the rivet 13 and the varistor 21.
On prévoit, selon l'invention, la rigidification du bras supérieur 8 du rupteur 7 de manière à ce que, lors du rivetage, la pression du rivet 7 soit appliquée sur la céramique de la varistance d'une manière uniforme et plane, c'est-à-dire sans porte à faux.Provision is made, according to the invention, for stiffening the upper arm 8 of the breaker 7 so that, during riveting, the pressure of the rivet 7 is applied to the varistor ceramic in a uniform and flat manner, this that is to say without cantilever.
Selon l'invention, d'autre part, on équipe l'epaulement 20 du noyau plongeur 6 d'une rondelle isolante 23 montée à force dans une gorge 24 du noyau 6.According to the invention, on the other hand, the shoulder 20 of the plunger core 6 is fitted with an insulating washer 23 forcibly mounted in a groove 24 in the core 6.
En effet, le bras inférieur 9 du rupteur 7 se trouve, durant certaines phases du cycle de fonctionnement, à un potentiel électrique égal à celui de la languette d'entrée 13. Le noyau plongeur 6 se trouve lui au potentiel de l'enveloppe 1 dont le montage mécanique sur le châssis du véhicule utilisateur aura pour effet de fixer le potentiel à la masse, c'est-à-dire au moins de la batterie. Il est donc indispensable, sous peine de court-circuit, qu'aucun des éléments du rupteur 7, et en particulier le bras inférieur 9 de celui-ci, ne se trouve en contact électrique avec un des éléments de l'enveloppe métallique 1 de l'avertisseur, y compris la membrane 2 et le noyau plongeur 6Indeed, the lower arm 9 of the breaker 7 is, during certain phases of the operating cycle, at an electrical potential equal to that of the input tab 13. The plunger core 6 is itself at the potential of the casing 1 the mechanical mounting of which on the chassis of the user vehicle will have the effect of fixing the potential to ground, that is to say at least of the battery. It is therefore essential, under penalty of short circuit, that none of the elements of the breaker 7, and in particular the lower arm 9 thereof, is in electrical contact with one of the elements of the metal casing 1 of the horn , including membrane 2 and plunger 6
On comprendra que la description ci-dessus a été donnée à simple titre d'exemple, sans caractère limitatif, et que des adjonctions ou des modifications constructives pourraient y être apportées sans sortir du cadre de l'invention. En particulier, au lieu de rigidifier le bras supérieur du rupteur, on peut insérer entre ce bras et la varistance une rondelle épaisse It will be understood that the above description has been given by way of example, without limitation, and that additions or constructive modifications could be made without departing from the scope of the invention. In particular, instead of stiffening the upper arm of the breaker, a thick washer can be inserted between this arm and the varistor

Claims

REVENDICATIONS
1. Avertisseur sonore à dispositif d'antiparasitage incorporé comprenant, à l'intérieur d'une enveloppe métallique (1) fermée par une membrane souple (2) solidaire d'un noyau plongeur (6) , une bobine (5) à l'intérieur de laquelle peut s'introduire le noyau plongeur (6) et un rupteur (7) dont les bras supérieur (8) et inférieur (9) sont isolés pour ne venir en contact que par leurs parties de contact (11,12), le rupteur (7) étant monté sur la dite enveloppe (1) par un rivet (13) isolé de cette dernière, caractérisé par une varistance (21) montée aux bornes du rupteur (17) pour juguler le signal parasite généré par l'arc électrique produit à chaque ouverture des parties de contact (11,12) du rupteur (7).1. Audible warning device with built-in interference suppression device comprising, inside a metal casing (1) closed by a flexible membrane (2) integral with a plunger core (6), a coil (5) at the inside of which the plunger core (6) and a breaker (7) can be introduced, the upper (8) and lower (9) arms of which are insulated so as to come into contact only with their contact parts (11,12), the breaker (7) being mounted on said casing (1) by a rivet (13) isolated from the latter, characterized by a varistor (21) mounted at the terminals of the breaker (17) to suppress the parasitic signal generated by the arc electric product at each opening of the contact parts (11,12) of the breaker (7).
2. Avertisseur sonore selon la revendication2. Audible warning device according to claim
1, caractérisé en ce que la varistance (21) se présente sous la forme d'une rondelle montée sur le corps du rivet (13), en étant isolée de celui-ci, et pressée entre les deux bras (8,9) du rupteur (7), à l'opposé des dites parties de contact (11,12), en faisant contact avec chacun des dits bras (8,9).1, characterized in that the varistor (21) is in the form of a washer mounted on the body of the rivet (13), being isolated from the latter, and pressed between the two arms (8, 9) of the breaker (7), opposite said contact parts (11,12), making contact with each of said arms (8,9).
3. Avertisseur sonore selon la revendication3. Audible warning device according to claim
2, caractérisé en ce que la rondelle formant varistance (21) est isolée du rivet (13) par un prolongement (22) de la carcasse (4) de la bobine (5).2, characterized in that the varistor washer (21) is isolated from the rivet (13) by an extension (22) of the carcass (4) of the coil (5).
4. Avertisseur sonore selon la revendication 2 ou la revendication 3, caractérisé en ce que le bras supérieur (8) du rupteur (7) est rigidifié afin que, lors du rivetage, il s'applique de manière uniforme et plane contre la face en regard de la varistance (21).4. Audible warning device according to claim 2 or claim 3, characterized in that the upper arm (8) of the breaker (7) is stiffened so that, during riveting, it is applied uniformly and flat against the face in look at the varistor (21).
5. Avertisseur sonore selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'epaulement (20) du noyau plongeur (6), destiné à engager le bras inférieur (9) du rupteur (7) pour séparer entre elles les parties de contact (11,12) de celui-ci, porte une rondelle isolante (23). 5. Audible warning device according to any one of claims 1 to 4, characterized in that the shoulder (20) of the plunger core (6), intended to engage the lower arm (9) of the contact breaker (7) to separate them the contact parts (11,12) thereof, carries an insulating washer (23).
6.Avertisseur sonore selon la revendication 5, caractérisé en ce que la dite rondelle isolante (23) est montée dans une gorge (24) ménagée dans le noyau plongeur ( 6) . 6.Audio horn according to claim 5, characterized in that said insulating washer (23) is mounted in a groove (24) formed in the plunger core (6).
EP96926460A 1995-07-26 1996-07-25 Audible warning device with a built-in interference suppressing device Expired - Lifetime EP0843873B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9509066A FR2737334B1 (en) 1995-07-26 1995-07-26 AUDIBLE ALARM WITH BUILT-IN PEST CONTROL DEVICE
FR9509066 1995-07-26
PCT/FR1996/001170 WO1997005601A1 (en) 1995-07-26 1996-07-25 Audible warning device with a built-in interference suppressing device

Publications (2)

Publication Number Publication Date
EP0843873A1 true EP0843873A1 (en) 1998-05-27
EP0843873B1 EP0843873B1 (en) 1999-10-20

Family

ID=9481389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96926460A Expired - Lifetime EP0843873B1 (en) 1995-07-26 1996-07-25 Audible warning device with a built-in interference suppressing device

Country Status (9)

Country Link
EP (1) EP0843873B1 (en)
AT (1) ATE185922T1 (en)
AU (1) AU6663296A (en)
DE (1) DE69604811T2 (en)
DK (1) DK0843873T3 (en)
ES (1) ES2141522T3 (en)
FR (1) FR2737334B1 (en)
PT (1) PT843873E (en)
WO (1) WO1997005601A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19853506B4 (en) * 1998-11-20 2008-01-31 Robert Bosch Gmbh Acoustic signal transmitter
FR2910167A1 (en) * 2006-12-14 2008-06-20 Composants Electr Sa Soc D Horn for motor vehicle, has movable core coupled to oscillating membrane and defining air gap with fixed core, and casing enclosing ferromagnetic element forming shunt to channalize electromagnetic flux to confine flux near coil

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB349183A (en) * 1929-03-18 1931-05-28 Moto Meter Gauge & Equip Corp Improvements in audible traffic signal or warning devices
US2145711A (en) * 1934-04-19 1939-01-31 Gen Motors Corp Sounding signal device
US2598994A (en) * 1949-07-28 1952-06-03 Russell A Gougeon Electromagnetically operated signal producing resonator device
DE3123877C1 (en) * 1981-06-16 1983-02-24 Siemens AG, 1000 Berlin und 8000 München Electrolytic cell shunting switch - with parallel connected varistor as energy absorber to prevent contact burn-up
DE3608761A1 (en) * 1986-03-15 1987-09-17 Hella Kg Hueck & Co ELECTROMAGNETIC SIGNAL HORN

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9705601A1 *

Also Published As

Publication number Publication date
FR2737334B1 (en) 1997-10-17
DE69604811T2 (en) 2000-06-29
ES2141522T3 (en) 2000-03-16
WO1997005601A1 (en) 1997-02-13
EP0843873B1 (en) 1999-10-20
DK0843873T3 (en) 2000-04-25
PT843873E (en) 2000-04-28
ATE185922T1 (en) 1999-11-15
FR2737334A1 (en) 1997-01-31
AU6663296A (en) 1997-02-26
DE69604811D1 (en) 1999-11-25

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