WO1987007997A1 - Device for the controlled discharge of electrostatic energy - Google Patents
Device for the controlled discharge of electrostatic energy Download PDFInfo
- Publication number
- WO1987007997A1 WO1987007997A1 PCT/FR1987/000239 FR8700239W WO8707997A1 WO 1987007997 A1 WO1987007997 A1 WO 1987007997A1 FR 8700239 W FR8700239 W FR 8700239W WO 8707997 A1 WO8707997 A1 WO 8707997A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- parts
- contact
- resistance
- insulating
- integrated
- 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.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
- H05F3/00—Carrying-off electrostatic charges
- H05F3/02—Carrying-off electrostatic charges by means of earthing connections
Definitions
- the present invention relates to a simple device per ⁇ evacuating the electrostatic charges which may be carriers of people or certain bodies.
- Certain conditions of modern life such as the use of synthetic materials in clothing, and the layout of premises, certain paints used for ' automobile bodies,' particularly in dry climates, or in air-conditioned rooms or rooms with an overheated atmosphere accentuate this phenomenon of accumulation of electrostatic charges.
- the charge thus accumulated can reach 300 picofarads under a potential of 10 to 15 Kilovolts.
- the energy released on contact with a metallic mass connected to. the earth is sometimes a few tens of millijoules.
- this device will allow the flow of a charge carried by an object, through the body of a character coming into contact with this object, through the device, and without the usual inconveniences due to rapid discharge.
- the device allows an equalization of the potentials between the charge carriers and possibly the discharge of a body through another connected to. the earth and this, with a current lower than the threshold of sensitivity of the human body is about 20 milliamps.
- the frequent case of an automobile which has moved in dry air is an example of application of the discharge of an object through the human body.
- the continuous friction of the air 5 on certain paints - of the bodywork - while the automobile is isolated from the ground by the tires generates a significant electrostatic charge.
- the driver who, when dismounted, returns to his vehicle by touching a door handle or by introducing a key into the lock of this door, will * cause the discharge with or without known inconvenience depending on whether he can not or can use the device described in the following lines.
- the charge accumulated by the human body is capable of causing a sudden discharge, with spark, of 5 to 10 Kilovolts; the level of 10 Kilovolts was used for the measurements and the development of the device.
- the spark during discharge is approximately 2 mm for potential differences between 5 and 10 KV. This value which depends on the conditions of temperature, humidity and the shape of the electrodes seems to be a minimum. It remains a valuable indication on the practical level to determine the conditions of discharge.
- the device is composed of a body -isolante material (1) which contains a resistor (4) high-ohmic (200.M-) which is itself rej.iée has parts (fig. 1) - ; contacts C2 and C3) integrated 'partially into the body (1). It is by holding between the fingers, one of the contact parts (2) of the device and by putting the other part (3) in contact with a conductive body to the ground such as a metal door frame. the user gets rid of it immediately. depending on the electrostatic charge it carries.
- the relative length of the device, as well as that of the resistance used, must be such that the bypass effect inside the insulating body C1) as in the outside air is avoided.
- the minimum distance in air between the charged human body and a conductive body at. the earth must be 15 to 20 mm so that disruptive discharge is avoided.
- REPLACEMENT SHEET a device that can remain modest in size while ensuring its insulating function.
- the part (2) of the device to be grasped by hand has a shape and an arrangement which ensure an easy grip and an almost systematic contact between the hand and this conductive part of the device; it will, for example, be longer than its opposite counterpart (3)
- the apparatus can be obtained by hot molding of insulating plastics enveloping on the one hand the resistor (4) and its connecting wires (bristles) and on the other hand the parts of the contact parts (2) and (3) to be integrated into the body (1) see fig. 1.
- the contact parts (2) and (3) in end pieces are drilled in their axis. a diameter corresponding to that of the resistance bristles; the workpiece (2) having a blind hole (5) for optionally allow the drilling of a hole (6) perpendiculair - ⁇ to the axis and intended to receive a ring.
- the device can also be obtained by using a tubular structure (Fig 2) constituting the body (1) into which the resistor (4) is inserted.
- the contact parts considered here as tips are mounted 'at both ends of the body and secured to it by the following methods:
- the electrical connection can be ensured, either by introducing bristles of the resis ⁇ tance in the end pieces and welding (8) fig. J., as described above, either by the effect of a spring at. compression (12) fig. 3, interposed between one of the end pieces and one of the ends of the resistor from which the bristles have been removed (see fig.
Landscapes
- Elimination Of Static Electricity (AREA)
Abstract
Description
DISPOSITIF DE DECHARGE CONTROLEE D'ENE&felE ELECTROSTATIQUE CONTROLLED DISCHARGE DEVICE FOR ENE & ELECTROSTATIC FELES
.La présente invention concerne, un dispositif simple per¬ mettant d'évacuer les charges électrostatiques dont peuvent se trouver porteurs des personnes ou certains corps..The present invention relates to a simple device per¬ evacuating the electrostatic charges which may be carriers of people or certain bodies.
Certaines conditions de la vie moderne comme l'emploi de matières synthétiques dans l'habillement, et l'aménagement des locaux, certaines peintures utilisées pour 'les carrosseries .. d'automobiles, 'et particulièrement sous des climats sec, ou dans- des locaux climatisés ou à ambiance surchauffée accentuent ce phénomène d'accumulation de charges électrostatiques.. La charge ainsi accumulée peut atteindre 300 picofarads sous un potentiel de 10 à 15 Kilovolts. L'énergie libérée au contact avec une masse métallique reliée à. la terre est parfois de quelques dizaines de millijoules.Certain conditions of modern life such as the use of synthetic materials in clothing, and the layout of premises, certain paints used for ' automobile bodies,' particularly in dry climates, or in air-conditioned rooms or rooms with an overheated atmosphere accentuate this phenomenon of accumulation of electrostatic charges. The charge thus accumulated can reach 300 picofarads under a potential of 10 to 15 Kilovolts. The energy released on contact with a metallic mass connected to. the earth is sometimes a few tens of millijoules.
On sait que dans les cas ou ce phénomène peut devenir dangereux (explosion,- geste fatal en salle d'opération) des procédés radicaux sont mis en oeuvre mais ces techniques sont • tro . compliquées et co teuses pour être employées darrs notre ..-cadre' de vie habituel, * -We know that in cases where this phenomenon can become dangerous (explosion, - fatal gesture in the operating room) radical processes are implemented but these techniques are • tro. Complicated and co teuses to be used darrs our ..- framework 'usual life * -
*" - Le dispositif simple et peu onéreux décrit ci-après permet l'évacuation de l'électricité statique dont est chargée une personne vers un corps conducteur en réduisant le courant d'é¬ c ange jusqu-à le rendre indolore» * " - The simple and inexpensive device described below allows the evacuation of static electricity which is responsible for a person to a conductive body by reducing the current of angel e¬ until it make it painless"
Réciproquement cet appareil va permettre l'écoulement d'une charge portée par un objet, à travers le corps d'une perso entrant en contact avec cet objet, par l'intermédiaire du dispo sitif, et sans les désagréments habituels dûs à la décharge rapiConversely, this device will allow the flow of a charge carried by an object, through the body of a character coming into contact with this object, through the device, and without the usual inconveniences due to rapid discharge.
Dans ces deux cas le dispositif permet une égalisation des potentiels entre les porteurs de charges et éventuellement la décharge d'un corps à travers un autre relié à. la terre et ceci, avec un courant inférieur au seuil de sensibilité du corps humain soit 20 milli-ampêres environ.In these two cases the device allows an equalization of the potentials between the charge carriers and possibly the discharge of a body through another connected to. the earth and this, with a current lower than the threshold of sensitivity of the human body is about 20 milliamps.
. Le cas fréquent d'une automobile qui s'est déplacée dans un air sec est un exemple d'application de la décharge d'un objet à travers le corps humain. Le frottement continu de l'air 5 sur certaines peintures- de la carrosserie- alors que l'automobil est isolée de la terre par les pneus engendre une charge élec¬ trostatique importante. Le conducteur qui, descendu à terre, , retourne à son véhicule en touchant une poignée de porte ou en introduisant une clef dans la serrure de cette porte, provo-* quera la décharge ayec ou non les désagréments connus selon qu'il ne pourra pas ou qu'il pourra user du dispositif décrit dans les lignes suivantes. La charge accumulée par le corps humain est susceptible de provoquer une décharge brutale, avec étincelle, de 5 à 10 Kilovolts ; le niveau de 10 Kilovolts a été retenu pour les mesures et la mise au point du dispositif.. The frequent case of an automobile which has moved in dry air is an example of application of the discharge of an object through the human body. The continuous friction of the air 5 on certain paints - of the bodywork - while the automobile is isolated from the ground by the tires generates a significant electrostatic charge. The driver who, when dismounted, returns to his vehicle by touching a door handle or by introducing a key into the lock of this door, will * cause the discharge with or without known inconvenience depending on whether he can not or can use the device described in the following lines. The charge accumulated by the human body is capable of causing a sudden discharge, with spark, of 5 to 10 Kilovolts; the level of 10 Kilovolts was used for the measurements and the development of the device.
L'étincelle lors de la décharge est de 2 mm environ pour des différences de potentiel comprises entre 5 et 10 KV. Cette valeur qui dépend des conditions de température, de degré hygrométrique et de la forme des électrodes paraît-être un minimum. Elle reste une indication précieuse sur le plan pratiqu pour déterminer les conditions de décharge. Le dispositif est composé (fig. 1) d'un corps en matière -isolante (1) qui contient une résistance (4) de haute valeur ohmique (200.M- ) qui est elle même rej.iée' â des pièces de - ; contact C2 et C3) intégrées' en partie dans le corps (1) . C'est en tenant entre les doigts, l'une des pièces de contact (2) de l'appareil et en mettant l'autre pièce (3) en contact avec un corps conducteur à la terre telle une huisserie métallique de porte que l'utilisateur se débarrasse sans dêsa- . gré ent de la charge électrostatique dont il est porteur.The spark during discharge is approximately 2 mm for potential differences between 5 and 10 KV. This value which depends on the conditions of temperature, humidity and the shape of the electrodes seems to be a minimum. It remains a valuable indication on the practical level to determine the conditions of discharge. The device is composed of a body -isolante material (1) which contains a resistor (4) high-ohmic (200.M-) which is itself rej.iée has parts (fig. 1) - ; contacts C2 and C3) integrated 'partially into the body (1). It is by holding between the fingers, one of the contact parts (2) of the device and by putting the other part (3) in contact with a conductive body to the ground such as a metal door frame. the user gets rid of it immediately. depending on the electrostatic charge it carries.
La longueur relative de l'appareil ainsi que celle de la résistance employée, doivent être telles que l'effet de contour- nement à l'intérieur du corps isolant Cl) comme dans l'air extérieur soit évité.The relative length of the device, as well as that of the resistance used, must be such that the bypass effect inside the insulating body C1) as in the outside air is avoided.
Dans les conditions d'électrisation les plus aïgues la distance minimum dans 1'air entre le corps humain chargé et un corps conducteur à. la terre doit être de 15 à 20 mm pour que la décharge disruptive soit évitée.Under the most acute electrification conditions, the minimum distance in air between the charged human body and a conductive body at. the earth must be 15 to 20 mm so that disruptive discharge is avoided.
De même, à. l'intérieur de l'appareil, l'emploi d'une résis¬ tance cylindrique d'un modèle standard et d'une longueur de quelques 25 mm environ permet d'éviter le contournement de l'étincelle d'une soie à l'autre sans autre précaution d'enro¬ bage ou d' nduction.Likewise, at. inside the device, the use of a cylindrical resis¬ tance of a standard model and with a length of around 25 mm makes it possible to avoid the circumvention of the spark from a silk to the other without any other precaution of coating or nduction.
Ce sont ces considérations qui ont conduit à la réalisationThese are the considerations that led to the realization
FEUILLE DE REMPLACEMENT d'un appareil pouvant rester de-dimensions modestes tout en assurant sa fonction isolante. *REPLACEMENT SHEET a device that can remain modest in size while ensuring its insulating function. *
La partie (2) de l'appareil devant être saisie par la main a une forme et une disposition qui assurent une prise facile et un contact quasi systématique entre la main et cette partie conductrice de l'appareil ; elle sera, par exemple, plus longue, que son homologue opposée (3)The part (2) of the device to be grasped by hand has a shape and an arrangement which ensure an easy grip and an almost systematic contact between the hand and this conductive part of the device; it will, for example, be longer than its opposite counterpart (3)
L'appareil peut être obtenu par moulage à chaud de matières plastiques isolantes enveloppant d'une part la résistance (4) et ses fils de liaison (soies) et d'autre part les parties des pièces de contact (2) et (3) devant être intégrées au corps (1) voir fig. 1.The apparatus can be obtained by hot molding of insulating plastics enveloping on the one hand the resistor (4) and its connecting wires (bristles) and on the other hand the parts of the contact parts (2) and (3) to be integrated into the body (1) see fig. 1.
Les pièces de contact (2) et (3) en embouts sont percées dans leur axe à. un diamètre correspondant à celui des soies de la résistance ; la pièce (2) ayant un trou borgne (5) pour permettre éventuellement le perçage d'un trou (6) perpendiculair - à^ l'axe et destiné à recevoir un anneau.The contact parts (2) and (3) in end pieces are drilled in their axis. a diameter corresponding to that of the resistance bristles; the workpiece (2) having a blind hole (5) for optionally allow the drilling of a hole (6) perpendiculair - ^ to the axis and intended to receive a ring.
Les so es seront alors.reliées aux pièces de contact; par soudure, celles-ci comporteront une gorge annulaire d'encrage dans la matière moulée (7) fig.l.The so es will then be linked to the contact parts; by welding, these will include an annular groove for anchoring in the molded material (7) fig.l.
L'appareil peut être également obtenu en utilisant une structure tubulaire (Fig 2) constituant le corps (1) dans laquelle est insérée la résistance (4) . Les pièces de contact considérées ici comme des embouts sont montées' aux deux extré- mités du corps et assujetties à celui-ci selon les méthodes suivantes :The device can also be obtained by using a tubular structure (Fig 2) constituting the body (1) into which the resistor (4) is inserted. The contact parts considered here as tips are mounted 'at both ends of the body and secured to it by the following methods:
- a) - ajustage cylindrique et montage en force avec collage facultatif (.fig. 2)- a) - cylindrical adjustment and force fitting with optional bonding (.fig. 2)
- b) - montage par filetage (9) Cfig. 3) - c) - montage par encliquetage (.10 fig. 3 associé ou non â un jonc circulaire (12)- b) - mounting by thread (9) Cfig. 3) - c) - snap-on mounting (.10 fig. 3 associated or not with a circular rod (12)
Dans ces trois modes de montage, la liaison électrique peut être assurée, soit par introduction des soies de la résis¬ tance dans les embouts et soudure (8) fig. J., comme il est décri précédemment, soit par l'effet d'un ressort à. compression (12) fig. 3, interpos entre l'un des embouts et l'une des extrémités de la résistance dont les soies auront été éliminées- (voir fig.In these three mounting methods, the electrical connection can be ensured, either by introducing bristles of the resis¬ tance in the end pieces and welding (8) fig. J., as described above, either by the effect of a spring at. compression (12) fig. 3, interposed between one of the end pieces and one of the ends of the resistor from which the bristles have been removed (see fig.
E REMP ACEMENT Il apparaît à l'évidence que ces techniques de fabrication permettent de faire varier la forme de l'appareil : cylindrique, ronde ou applatie, ovoïde, parallèlépipédique, etc..E REPLACEMENT It is obvious that these manufacturing techniques make it possible to vary the shape of the device: cylindrical, round or flat, ovoid, parallelepipedic, etc.
Le choix des modes de montage pourra dépendre de l'utilisa- tion secondaire qui sera faite de l'appareil, par exemple : corps de porte-clefs, tournevis, etc..» Ces exemples montrent que l'appareil peut-être diffusé dans un large public sous la forme d'un objet connu et d'usage banal tout en restant d'une manipulation facile et d'un coût raisonnable» Le caractère simple et économique du dispositif résulte rThe choice of mounting methods may depend on the secondary use to which the device will be put, for example: key-holder body, screwdriver, etc. ”These examples show that the device can be distributed in a large public in the form of a known object and of banal use while remaining of an easy handling and a reasonable cost ”The simple and economic character of the device results r
- a) - du fait que l'appareil est constitué d'une résistance unique de haute valeur (200 M ) , d'une fabrication standard, et que son inclusion dans un corps isolant de forme simple et de dimensions réduites permet un usage banalisé dans toutes les circonstances»- a) - the fact that the device is made up of a single high-value resistor (200 M), of standard manufacture, and that its inclusion in an insulating body of simple shape and reduced dimensions allows an ordinary use in all circumstances "
-- b) - du fait que c'est la personne risquant d'être incommodée par la décharge qui accomplit le geste -nécessaire d'utilisation de l'appareil tout en étant elle-même le corps chargé ou le corps conducteur.- b) - the fact that it is the person at risk of being inconvenienced by the discharge which performs the gesture -necessary to use the device while being itself the charged body or the conducting body.
E ΌZ BE?SP^C£Î £NT E ΌZ BE? SP ^ C £ Î £ NT
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8609028A FR2600259A1 (en) | 1986-06-23 | 1986-06-23 | ELECTROSTATIC ENERGY CONTROLLED DISCHARGE DEVICE |
| FR86/09028 | 1986-06-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1987007997A1 true WO1987007997A1 (en) | 1987-12-30 |
Family
ID=9336574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR1987/000239 Ceased WO1987007997A1 (en) | 1986-06-23 | 1987-06-22 | Device for the controlled discharge of electrostatic energy |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU7542587A (en) |
| FR (1) | FR2600259A1 (en) |
| WO (1) | WO1987007997A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2636513A1 (en) * | 1988-09-20 | 1990-03-23 | Maurel Jacques | Anti-static underframe for office chair |
| WO1994001305A1 (en) * | 1992-07-07 | 1994-01-20 | C.V.G. - Centro Veneto Galvanico - S.R.L. | Method and a device for preventing flashovers |
| WO1994004012A1 (en) * | 1992-07-29 | 1994-02-17 | Key Tronic Corporation | Computer keyboard with electrostatic discharge feature |
| WO1995007598A1 (en) * | 1993-09-09 | 1995-03-16 | Statpad Limited | Electrostatic charge potential equaliser |
| WO2004064917A1 (en) * | 2003-01-22 | 2004-08-05 | Stopshock Limited | Apparatus for use by a person for dissipating an electrostatic charge |
| RU2288551C1 (en) * | 2005-03-21 | 2006-11-27 | Федеральное Государственное Унитарное Предприятие "Государственный Рязанский Приборный Завод" | Electrostatic charge removing device |
| RU2535082C2 (en) * | 2013-03-21 | 2014-12-10 | ФЕДЕРАЛЬНОЕ ГОСУДАРСТВЕННОЕ БЮДЖЕТНОЕ УЧРЕЖДЕНИЕ ВСЕРОССИЙСКИЙ НАУЧНО-ИССЛЕДОВАТЕЛЬСКИЙ И ИСПЫТАТЕЛЬНЫЙ ИНСТИТУТ МЕДИЦИНСКОЙ ТЕХНИКИ ФЕДЕРАЛЬНОЙ СЛУЖБЫ ПО НАДЗОРУ В СФЕРЕ ЗДРАВООХРАНЕНИЯ (ФГБУ "ВНИИИМТ" Росздравнадзора) | Mokhsogol therapeutic-diagnostic static eliminator for humans and animals |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3780345A (en) * | 1972-09-14 | 1973-12-18 | E Earman | Static electricity deshocker |
| DE2621672A1 (en) * | 1976-05-15 | 1977-12-01 | Karl Sterl | Miniature static discharger for personal use - has resistance between conductive grip and earthing conductor and includes hollow insulating rod |
| US4570200A (en) * | 1983-03-04 | 1986-02-11 | Nippondenso Co., Ltd. | Static discharge device |
-
1986
- 1986-06-23 FR FR8609028A patent/FR2600259A1/en not_active Withdrawn
-
1987
- 1987-06-22 WO PCT/FR1987/000239 patent/WO1987007997A1/en not_active Ceased
- 1987-06-22 AU AU75425/87A patent/AU7542587A/en not_active Abandoned
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3780345A (en) * | 1972-09-14 | 1973-12-18 | E Earman | Static electricity deshocker |
| DE2621672A1 (en) * | 1976-05-15 | 1977-12-01 | Karl Sterl | Miniature static discharger for personal use - has resistance between conductive grip and earthing conductor and includes hollow insulating rod |
| US4570200A (en) * | 1983-03-04 | 1986-02-11 | Nippondenso Co., Ltd. | Static discharge device |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2636513A1 (en) * | 1988-09-20 | 1990-03-23 | Maurel Jacques | Anti-static underframe for office chair |
| WO1994001305A1 (en) * | 1992-07-07 | 1994-01-20 | C.V.G. - Centro Veneto Galvanico - S.R.L. | Method and a device for preventing flashovers |
| WO1994004012A1 (en) * | 1992-07-29 | 1994-02-17 | Key Tronic Corporation | Computer keyboard with electrostatic discharge feature |
| US5335137A (en) * | 1992-07-29 | 1994-08-02 | Key Tronic Corporation | Computer keyboard with electrostatic discharge feature |
| WO1995007598A1 (en) * | 1993-09-09 | 1995-03-16 | Statpad Limited | Electrostatic charge potential equaliser |
| US5761022A (en) * | 1993-09-09 | 1998-06-02 | Statpad Limited | Electrostatic charge potential equaliser |
| WO2004064917A1 (en) * | 2003-01-22 | 2004-08-05 | Stopshock Limited | Apparatus for use by a person for dissipating an electrostatic charge |
| GB2412592A (en) * | 2003-01-22 | 2005-10-05 | Stopshock Ltd | Apparatus for use by a person for dissipating an electrostatic charge |
| GB2412592B (en) * | 2003-01-22 | 2006-04-19 | Stopshock Ltd | Apparatus for use by a person for dissipating an electrostatic charge |
| RU2288551C1 (en) * | 2005-03-21 | 2006-11-27 | Федеральное Государственное Унитарное Предприятие "Государственный Рязанский Приборный Завод" | Electrostatic charge removing device |
| RU2535082C2 (en) * | 2013-03-21 | 2014-12-10 | ФЕДЕРАЛЬНОЕ ГОСУДАРСТВЕННОЕ БЮДЖЕТНОЕ УЧРЕЖДЕНИЕ ВСЕРОССИЙСКИЙ НАУЧНО-ИССЛЕДОВАТЕЛЬСКИЙ И ИСПЫТАТЕЛЬНЫЙ ИНСТИТУТ МЕДИЦИНСКОЙ ТЕХНИКИ ФЕДЕРАЛЬНОЙ СЛУЖБЫ ПО НАДЗОРУ В СФЕРЕ ЗДРАВООХРАНЕНИЯ (ФГБУ "ВНИИИМТ" Росздравнадзора) | Mokhsogol therapeutic-diagnostic static eliminator for humans and animals |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2600259A1 (en) | 1987-12-24 |
| AU7542587A (en) | 1988-01-12 |
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