EP0011008A1 - Screw-base lamp socket having braking means to oppose unscrewing of the lamp - Google Patents

Screw-base lamp socket having braking means to oppose unscrewing of the lamp Download PDF

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Publication number
EP0011008A1
EP0011008A1 EP79400726A EP79400726A EP0011008A1 EP 0011008 A1 EP0011008 A1 EP 0011008A1 EP 79400726 A EP79400726 A EP 79400726A EP 79400726 A EP79400726 A EP 79400726A EP 0011008 A1 EP0011008 A1 EP 0011008A1
Authority
EP
European Patent Office
Prior art keywords
threaded ring
brake member
base
insulating body
lamp
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
EP79400726A
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German (de)
French (fr)
Other versions
EP0011008B1 (en
Inventor
Jacques Da Rocha
Gérard Dunouhaud
Roger Parlatore
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.)
Legrand SA
Original Assignee
Legrand SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Legrand SA filed Critical Legrand SA
Priority to AT79400726T priority Critical patent/ATE1439T1/en
Publication of EP0011008A1 publication Critical patent/EP0011008A1/en
Application granted granted Critical
Publication of EP0011008B1 publication Critical patent/EP0011008B1/en
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
    • H01R33/97—Holders with separate means to prevent loosening of the coupling or unauthorised removal of apparatus held
    • H01R33/971—Holders with separate means to prevent loosening of the coupling or unauthorised removal of apparatus held for screw type coupling devices

Definitions

  • the present invention relates generally to screw sockets, and is aimed more particularly but not exclusively at those sockets which, said to be safety sockets, include, in an insulating body, most often made of so-called electrotechnical quality porcelain, a ring threaded, which is suitable for screw-on engagement of the base of a lamp, and which is intended to remain de-energized, its only function being a mechanical retaining function, an axial contact at the bottom of the base, with which the axial stud of such a lamp is intended to come into contact, and a lateral contact of the base, with which the base of this lamp is intended jointly to come into contact.
  • the threaded retaining ring may locally have a deformation forming a brake, or, as described in particular in French patent No. 1,347,848, its thread be formed by elastic tongues each forming such a brake.
  • the insulating body must in practice be modified with respect to a conventional comparable insulating body, to allow the establishment of such a strip and ensure its maintenance in position.
  • the present invention generally relates to a screw socket which, although provided with a brake member, is free from such drawbacks, taking advantage of the fact that, to date, almost generally, the ring threaded comprises radially a collar by which it bears on a shoulder of the insulating body.
  • This screw socket which is generally of the kind, not necessarily limited to safety sockets, comprising, in an insulating body, a threaded ring, which is suitable for the screw connection of the base of a lamp, and which has a cutout with the aid of which a brake member protrudes inside said ring and is thus suitable for bearing on such a base, said brake member comprising an elastically deformable strip extending both axially and circumferentially screws -with respect to the threaded ring with which it is associated, the threaded ring comprising radially a collar by which it bears on a shoulder of the insulating body, is characterized in that the strip forming the brake member is integral with a support flange inserted between said flange of the threaded ring and said shoulder of the insulating body.
  • This socket comprises an insulating body 10, in practice made of porcelain, generally formed by a base 11 and a skirt 12.
  • the base 11 externally carries two connection terminals 13.
  • the skirt 12 has, beyond a transverse shoulder 14, a thread 15, of diameter D1 at its top, which extends only over part of its height, at a distance from the base 11.
  • this retaining ring 17 On this thread 15 is engaged, by screwing, a threaded retaining ring 17, of internal diameter at the bottom of the thread D2; this retaining ring 17 in practice has a radial flange 18 by which it is normally able to bear on the shoulder 14 of the insulating body 10.
  • its radial flange 18 is usually assigned locally to two deformations 19, practiced in diametrically opposite positions, in line with notches provided for this purpose on the shoulder 14 of the insulating body 10.
  • the insulating body 10 Close to its base 11, the insulating body 10 also contains a lateral contact of base 20, which, in the example of embodiment shown, is in the form of an annular ring attached to the base 11 by a base 21 which is in electrical connection with one of the connection terminals 13 ..
  • the insulating body 10 also contains an axial contact at the bottom of the base 23, which is in electrical connection with the other of the connection terminals 13.
  • the threaded ring 17 has locally, in the vicinity of its radial flange 18, a cutout 25 with the aid of which a brake member 26 intervenes, this brake member projecting inside this threaded ring 17 and being thus suitable for wearing on the base 27 of a screw base lamp 28 when this lamp is engaged by screwing in the socket concerned.
  • This brake member 26 is in practice constituted by an elastically deformable strip, which extends both axially, that is to say parallel to the axis of the ring 17, and circumferentially, that is to say circularly vis-à-vis this ring, on a circular segment whose development, limited, is linked to that of the cutout 25 of said ring.
  • the brake member 26 is integral with a support flange 30 inserted between the radial flange 18 of the threaded ring 17 and the shoulder 14 of the insulating body 10.
  • this radial flange 18 bears on this shoulder 14.
  • the brake member 26 and its support flange 30 may advantageously be in one piece and come from one and the same metal blank, made of spring steel, suitably cut, folded, and shaped.
  • the support flange 30 extends in practice circularly in a circular sector.
  • this circular sector does not extend over 360 °, but, for good resistance of the support flange 30 with respect to the threaded ring 17, in particular during the mounting, its opening in the center is preferably at least equal to 180 °, and in practice, as shown in the figures, slightly greater than 180 °.
  • the strip forming the brake member 26 according to the invention is attached to its support flange 30 by that of the circumferential edges thereof which is radially closest to the axis of the threaded ring 17, and therefore it crosses radially the cutout 25 of this ring.
  • the lamella forming the brake member 26 according to the invention is, circumferentially, generally curved, in successive facets, being convex in the direction of the axis of the threaded ring 17.
  • this strip makes, radially, with respect to the bottom of the thread of the threaded ring 17, a projection of radial development e l , FIG. 2.
  • the radial projection el is such that the distance D 4 to the bottom of the diametrically opposite thread of the retaining ring 17 is less than the diameter D3 of the base 27 of the lamp 28.
  • This strip being elastically deformable, it however elastically maintains its pressure against the base 27 of the lamp 28, and therefore opposes any untimely unscrewing of the latter under the effect of possible vibrations.
  • the strip constituting the brake member 26 advantageously bears, by the axial edges of its lateral facets, on the thread 15 of the insulating body 10, the initial distance e 2 between these and this thread being absorbed.
  • the brake effect of the lamella 26 is thereby improved, and jointly, the work in bending of its central facet is relieved.
  • the lateral facets of the lamella 26 can be detached from the support flange 30 thereof, only the middle facet of this lamella therefore being in continuity with this support flange.
  • the strip 26 constituting the brake member according to the invention may have projecting at least one protuberance with differentiated circumferential action, established so as to oppose the unscrewing of the lamp 28 while not opposing not to its screwing.
  • its central facet 32 may have two or three punctures 35 oriented circumferentially in a direction chosen to correspond to the direction of screwing, as indicated by the arrow F in this FIG. 6.
  • the facet 33 furthest downstream in the direction of screwing has a projecting elastically deformable tongue 36, chosen to correspond to the direction of screwing F.
  • the strip 26 forming the brake member according to the invention is attached to its support flange 30 by that of the circumferential edges thereof which is radially furthest from the axis of the threaded ring 17, and, after a bend 38 in the form of a butt, by which it bypasses the radial flange 18 of this ring, it extends axially in the cutout 25 thereof.
  • the insulating body 10 is of the ordinary type, and that the brake member 26 does not imply any particular adaptation or modification of this insulating body 10, nor does it increase in any way w 'radial bulk of the assembly.
  • a safety socket that is to say a socket whose lateral contact of base is distinct from the threaded retaining ring, it this is not necessarily so, this threaded ring being able as well, for ordinary sockets, to serve by itself as lateral contact.

Abstract

1. A screw-type socket of the kind comprising, in an insulating body (10), a screwthreaded ring (17) for screw engagement of the base of a lamp and having a cut-out portion (25) by means of which a restraining member (26) projects inwardly of the screwthreaded ring (17) and is thus capable of bearing against such a lamp base, said restraining member (26) comprising a resiliently deformable blade extending both axially and circumferentially with respect to the screwthreaded ring with which it is associated, and the screwthreaded ring (17) radially comprising a collar (18) by means of which it bears against a shoulder (14) of the insulating body (10), characterized in that the blade forming the restraining member (26) is fixed with respect to a support plate (30) which is inserted between said collar (18) of the screwthreaded ring (17) and said shoulder (14) of the insulating body (10).

Description

La présente invention concerne d'une manière générale les douilles à vis, et vise plus particulièrement mais non exclusivement celles de ces douilles qui, dites de sécurité, comportent, dans un corps isolant, le plus souvent en porcelaine de qualité dite électrotechnique, une bague filetée, qui est propre à l'engagement à vissage du culot d'une lampe, et qui est destinée à demeurer hors tension, sa seule fonction étant une fonction mécanique de retenue, un contact axial de fond de culot, avec lequel le plot axial d'une telle lampe est destiné à venir en contact, et un contact latéral'de culot, avec lequel le culot de cette lampe est destiné conjointement à venir en contact.The present invention relates generally to screw sockets, and is aimed more particularly but not exclusively at those sockets which, said to be safety sockets, include, in an insulating body, most often made of so-called electrotechnical quality porcelain, a ring threaded, which is suitable for screw-on engagement of the base of a lamp, and which is intended to remain de-energized, its only function being a mechanical retaining function, an axial contact at the bottom of the base, with which the axial stud of such a lamp is intended to come into contact, and a lateral contact of the base, with which the base of this lamp is intended jointly to come into contact.

La continuité électrique entre, d'une part le contact axial de fond de culot et le plot axial d'une lampe, et, d'autre part le contact latéral de culot et le culot d'une telle lampe, s'établit en fin de vissage de celle-ci.The electrical continuity between, on the one hand the axial contact of the base of the base and the axial stud of a lamp, and, on the other hand, the lateral contact of the base and the base of such a lamp, is established at the end. screwing it.

Mais elle est tributaire d'un tel vissage, et il n'est pas rare qu'en raison d'un dévissage partiel, dû par exemple à des vibrations, cette continuité électrique se trouve plus ou moins compromise, ce qui, outre des défauts de fonctionnement, conduit inévitablement à des échauffements nuisibles aux contacts intéressés.But it is dependent on such a screwing, and it is not uncommon that due to a partial unscrewing, due for example to vibrations, this electrical continuity is more or less compromised, which, in addition to faults of operation, inevitably leads to overheating which is harmful to the contacts concerned.

Divers palliatifs ont été proposés pour s'opposer à un tel dévissage.Various palliatives have been proposed to oppose such an unscrewing.

Par exemple, la bague filetée de retenue peut présenter localement une déformation formant frein, ou, tel que décrit notamment dans le brevet français N° 1.347.848, son filet être formé par des languettes élastiques formant chacune un tel frein.For example, the threaded retaining ring may locally have a deformation forming a brake, or, as described in particular in French patent No. 1,347,848, its thread be formed by elastic tongues each forming such a brake.

Mais la marge de sécurité dans un tel cas est le plus souvent insuffisante, et elle ne permet pas en pratique de tenir compte des variations dimensionnelles dont sont usuellement l'objet les culots de lampes du commerce.But the safety margin in such a case is most often insufficient, and it does not in practice make it possible to take account of the dimensional variations which are usually the subject of commercial lamp bases.

Parallèlement, il a déjà été proposé de pratiquer sur la bague filetée de retenue une fenêtre, pour l'intervention, à travers celle-ci, d'un organe frein, roue dentée tenue par un ressort en fil, ou proéminence formée sur un tel ressort en fil, par exemple, adapté à venir porter sur le culot de la lampe à retenir ; c'est le cas par exemple dans la demande de brevet allemand N° 1.044.962, le brevet allemand N° 946.375, et le brevet anglais ? 206.732.At the same time, it has already been proposed to make a window on the threaded retaining ring for the intervention, through the latter, of a brake member, toothed wheel held by a wire spring, or prominence formed on such a wire spring, for example, adapted to come to bear on the base of the lamp to be retained; this is the case for example in the German patent application No. 1,044,962, the German patent No. 946,375, and the English patent? 206.732.

Mais, à ce jour, de tels organes frein impliquent usuellement une augmentation de l'encombrement radial de l'ensemble, pouvant nécessiter une modification correspondante du corps isolant.However, to date, such brake members usually involve an increase in the overall size of the assembly, which may require a corresponding modification of the insulating body.

Il a été également proposé de réaliser l'organe frein à l'aide d'une lamelle élastiquement déformable s'étendant aussi bien axialement que circonférentiellement vis-à-vis de la bague filetée, à la différence d'un simple fil.It has also been proposed to produce the brake member using an elastically deformable strip extending both axially and circumferentially with respect to the threaded ring, unlike a single wire.

C'est le cas par exemple dans le brevet U.S.A. N° 1.936.871 ainsi que dans le brevet français N° 1.151.075.This is the case for example in the U.S.A. patent No. 1,936,871 as well as in the French patent No. 1,151,075.

Mais, là encore, le corps isolant doit en pratique être modifié par rapport à un corps isolant comparable usuel, pour permettre la mise en place d'une telle lamelle et en assurer le maintien en position.But, here again, the insulating body must in practice be modified with respect to a conventional comparable insulating body, to allow the establishment of such a strip and ensure its maintenance in position.

La présente invention a d'une manière générale pour objet une douille à vis qui, bien que dotée d'un organe frein, est exempte de tels inconvénients, en tirant parti du fait que, à ce jour, de manière quasi générale, la bague filetée comporte radialement une collerette par laquelle elle prend appui sur un épaulement du corps isolant.The present invention generally relates to a screw socket which, although provided with a brake member, is free from such drawbacks, taking advantage of the fact that, to date, almost generally, the ring threaded comprises radially a collar by which it bears on a shoulder of the insulating body.

Cette douille à vis, qui est d'une manière générale du genre, non nécessairement limité aux douilles de sécurité, comportant, dans un corps isolant, une bague filetée, qui est propre à l'engagement à vissage du culot d'une lampe, et qui présente une découpe à la faveur de laquelle un organe frein fait saillie à l'intérieur de ladite bague et est ainsi propre à porter sur un tel culot, ledit organe frein comportant une lamelle élastiquement déformable s'étendant aussi bien axialement que circonférentiellement vis-à-vis de la bague filetée à laquelle elle est associée, la bague filetée comportant radialement une collerette par laquelle elle prend appui sur un épaulement du corps isolant, est caractérisée en ce que la lamelle formant l'organe frein est solidaire d'un flasque de support inséré entre ladite collerette de la bague filetée et ledit épaulement du corps isolant.This screw socket, which is generally of the kind, not necessarily limited to safety sockets, comprising, in an insulating body, a threaded ring, which is suitable for the screw connection of the base of a lamp, and which has a cutout with the aid of which a brake member protrudes inside said ring and is thus suitable for bearing on such a base, said brake member comprising an elastically deformable strip extending both axially and circumferentially screws -with respect to the threaded ring with which it is associated, the threaded ring comprising radially a collar by which it bears on a shoulder of the insulating body, is characterized in that the strip forming the brake member is integral with a support flange inserted between said flange of the threaded ring and said shoulder of the insulating body.

Ainsi le maintien de la lamelle formant l'organe frein se trouve avantageusement assuré sans qu'il soit nécessaire de prévoir à cet effet une quelconque modification du corps isolant par rapport à un corps isolant usuel, et sans que l'encombrement radial de l'ensemble soit augmenté.Thus the maintenance of the strip forming the brake member is advantageously ensured without it being necessary to provide for this purpose any modification of the insulating body with respect to a usual insulating body, and without the radial size of the together be increased.

Les caractéristiques et avantages de l'invention ressortiront d'ailleurs de la description qui va suivre, à titre d'exemple, en référence aux dessins schématiques annexés sur lesquels :

  • la figure 1 est, avec arrachement, une vue en perspective d'une douille à vis suivant l'invention ;
  • la figure 2 est, à échelle supérieure, une vue partielle en coupe axiale de cette douille ;
  • la figure 3 en est, à échelle différente et, avec arrachement, une vue de dessus, suivant la flèche III de la figure 2 ;
  • la figure 4 est une vue en perspective éclatée de la bague filetée de retenue de cette douille et de l'organe frein qui lui est associé suivant l'invention
  • la figure 5 est une vue en coupe circonférentielle de cet organe frein, suivant la ligne V-V de la figure 4 ;
  • les figures 6 et 7 sont des vues analogues à celle de la figure 5 et concernent chacune respectivement une variante de réalisation ;
  • la figure 8 est, suivant une autre variante de réalisation, une vue en coupe axiale d'une bague de retenue et de l'organe frein qui lui est associé suivant l'invention.
The characteristics and advantages of the invention will become apparent from the description which follows, by way of example, with reference to the appended schematic drawings in which:
  • Figure 1 is, with cutaway, a perspective view of a screw socket according to the invention;
  • Figure 2 is, on a larger scale, a partial view in axial section of this sleeve;
  • Figure 3 is, on a different scale and, with cutaway, a top view, along arrow III of Figure 2;
  • Figure 4 is an exploded perspective view of the threaded retaining ring of this sleeve and the brake member associated therewith according to the invention
  • Figure 5 is a circumferential sectional view of this brake member, along the line VV of Figure 4;
  • Figures 6 and 7 are views similar to that of Figure 5 and each relate respectively to an alternative embodiment;
  • Figure 8 is, according to another alternative embodiment, an axial sectional view of a retaining ring and the brake member associated therewith according to the invention.

Ces figures illustrent l'application de l'invention à une douille de sécurité.These figures illustrate the application of the invention to a safety socket.

Cette douille comporte un corps isolant 10, en pratique en porcelaine, globalement formé d'un socle 11 et d'une jupe 12.This socket comprises an insulating body 10, in practice made of porcelain, generally formed by a base 11 and a skirt 12.

Le socle 11 porte extérieurement deux bornes de raccordement 13.The base 11 externally carries two connection terminals 13.

Intérieurement, la jupe 12 présente, au-delà d'un épaulement transversal 14, un filet 15, de diamètre Dl à son sommet, qui s'étend seulement sur une partie de sa hauteur, à distance du socle 11.Internally, the skirt 12 has, beyond a transverse shoulder 14, a thread 15, of diameter D1 at its top, which extends only over part of its height, at a distance from the base 11.

Sur ce filet 15 est engagée, à vissage, une bague filetée de retenue 17, de diamètre interne en fond de filet D2 ; cette bague de retenue 17 présente en pratique une collerette radiale 18 par laquelle elle est normalement apte à prendre appui sur l'épaulement 14 du corps isolant 10.On this thread 15 is engaged, by screwing, a threaded retaining ring 17, of internal diameter at the bottom of the thread D2; this retaining ring 17 in practice has a radial flange 18 by which it is normally able to bear on the shoulder 14 of the insulating body 10.

Pour son blocage en rotation dans celui-ci, sa collerette radiale 18 est de manière usuelle affectée localement de deux déformations 19, pratiquées en positions diamétralement opposées, au droit d'encoches prévues à cet effet sur l'épaulement 14 du corps isolant 10.For its rotational locking therein, its radial flange 18 is usually assigned locally to two deformations 19, practiced in diametrically opposite positions, in line with notches provided for this purpose on the shoulder 14 of the insulating body 10.

A proximité de son socle 11, le corps isolant 10 contient encore un contact latéral de culot 20, qui, dans l'exemple de réalisation représenté, se présente sous la forme d'une bague annulaire rapportée sur le socle 11 par un piètement 21 qui est en liaison électrique avec l'une des bornes de raccordement 13..Close to its base 11, the insulating body 10 also contains a lateral contact of base 20, which, in the example of embodiment shown, is in the form of an annular ring attached to the base 11 by a base 21 which is in electrical connection with one of the connection terminals 13 ..

Enfin, au centre de son socle 11, le corps isolant 10 contient encore un contact axial de fond de culot 23, qui est en liaison électrique avec l'autre des bornes de raccordement 13.Finally, at the center of its base 11, the insulating body 10 also contains an axial contact at the bottom of the base 23, which is in electrical connection with the other of the connection terminals 13.

De manière connue en soi la bague filetée 17 comporte localement, au voisinage de sa collerette radiale 18, une découpe 25 à la faveur de laquelle intervient un organe frein 26, cet organe frein faisant saillie à l'intérieur de cette bague filetée 17 et étant ainsi propre à porter sur le culot 27 d'une lampe à culot à vis 28 lorsque cette lampe est engagée à vissage dans la douille concernée.In a manner known per se, the threaded ring 17 has locally, in the vicinity of its radial flange 18, a cutout 25 with the aid of which a brake member 26 intervenes, this brake member projecting inside this threaded ring 17 and being thus suitable for wearing on the base 27 of a screw base lamp 28 when this lamp is engaged by screwing in the socket concerned.

Cet organe frein 26 est en pratique constitué par une lamelle élastiquement déformable, qui s'étend aussi bien axialement, c'est-à-dire parallèlement à l'axe de la bague 17, que circonférentiellement, c'est-à-dire circulairement vis-à-vis de cette bague, sur un segment circulaire dont le développement, limité, est lié à celui de la découpe 25 de ladite bague.This brake member 26 is in practice constituted by an elastically deformable strip, which extends both axially, that is to say parallel to the axis of the ring 17, and circumferentially, that is to say circularly vis-à-vis this ring, on a circular segment whose development, limited, is linked to that of the cutout 25 of said ring.

Suivant l'invention l'organe frein 26 est solidaire d'un flasque de support 30 inséré entre la collerette radiale 18 de la bague filetée 17 et l'épaulement 14 du corps isolant 10.According to the invention, the brake member 26 is integral with a support flange 30 inserted between the radial flange 18 of the threaded ring 17 and the shoulder 14 of the insulating body 10.

C'est donc par l'intermédiaire de ce flasque support que cette collerette radiale 18 prend appui sur cet épaulement 14.It is therefore through this support flange that this radial flange 18 bears on this shoulder 14.

L'organe frein 26 et son flasque de support 30 peuvent avantageusement être d'un seul tenant et venir d'un seul et même flan métallique, en acier à ressort, convenablement découpé, plié, et conformé.The brake member 26 and its support flange 30 may advantageously be in one piece and come from one and the same metal blank, made of spring steel, suitably cut, folded, and shaped.

Le flasque de support 30 s'étend en pratique circulairement suivant un secteur circulaire.The support flange 30 extends in practice circularly in a circular sector.

De préférence, pour limiter l'ampleur du flan métallique initial, ce secteur circulaire ne s'étend pas sur 360°, mais, pour une bonne tenue du flasque de support 30 vis-à-vis de la bague filetée 17, notamment lors du montage, son ouverture au centre est de préférence au moins égale à 180°, et en pratique, tel que représenté sur les figures, légèrement supérieure à 180°.Preferably, to limit the extent of the initial metal blank, this circular sector does not extend over 360 °, but, for good resistance of the support flange 30 with respect to the threaded ring 17, in particular during the mounting, its opening in the center is preferably at least equal to 180 °, and in practice, as shown in the figures, slightly greater than 180 °.

Dans la forme de réalisation représentée sur les figures 1 à 5, la lamelle formant l'organe frein 26 suivant l'invention se rattache à son flasque de support 30 par celui des bords circonférentiels de celui-ci qui est radialement le plus proche de l'axe de la bague filetée 17, et elle traverse donc radialement la découpe 25 de cette bague.In the embodiment shown in FIGS. 1 to 5, the strip forming the brake member 26 according to the invention is attached to its support flange 30 by that of the circumferential edges thereof which is radially closest to the axis of the threaded ring 17, and therefore it crosses radially the cutout 25 of this ring.

En outre, dans la forme de réalisation représentée sur les figures 1 à 5, la lamelle formant l'organe frein 26 suivant l'invention est, circonférentiellement, globalement cintrée, en facettes successives, en étant convexe en direction de l'axe de la bague filetée 17.In addition, in the embodiment shown in FIGS. 1 to 5, the lamella forming the brake member 26 according to the invention is, circumferentially, generally curved, in successive facets, being convex in the direction of the axis of the threaded ring 17.

Par sa facette médiane, cette lamelle fait, radialement, vis-à-vis du fond du filet de la bague filetée 17, une saillie de développement radial el, figure 2.By its median facet, this strip makes, radially, with respect to the bottom of the thread of the threaded ring 17, a projection of radial development e l , FIG. 2.

Par les bords axiaux de ses facettes latérales, elle est, radialement, à une distance e2 du sommet du filet 15 du corps isolant 10.By the axial edges of its lateral facets, it is, radially, at a distance e 2 from the top of the thread 15 of the insulating body 10.

La saillie radiale el est telle que la distance D4 au fond de filet diamétralement opposé de la bague de retenue 17 est inférieure au diamètre D3 du culot 27 de la lampe 28.The radial projection el is such that the distance D 4 to the bottom of the diametrically opposite thread of the retaining ring 17 is less than the diameter D3 of the base 27 of the lamp 28.

Par suite, lors du vissage de ce culot dans la bague filetée 17, il y a nécessairement une déformation élastique de la lamelle 26 constituant l'organe frein, qui contraint celle-ci à refluer radialement en direction opposée à l'axe de la bague filetée 170Consequently, during the screwing of this base in the threaded ring 17, there is necessarily an elastic deformation of the strip 26 constituting the brake member, which forces the latter to flow back radially in the direction opposite to the axis of the ring. threaded 170

Cette lamelle étant élastiquement déformable, elle maintient cependant élastiquement sa pression contre le culot 27 de la lampe 28, et s'oppose donc à tout dévissage intempestif de celle-ci sous l'effet d'éventuelles vibrations.This strip being elastically deformable, it however elastically maintains its pressure against the base 27 of the lamp 28, and therefore opposes any untimely unscrewing of the latter under the effect of possible vibrations.

Dans son action, la lamelle constituant l'organe frein 26 prend avantageusement appui, par les bords axiaux de ses facettes latérales, sur le filet 15 du corps isolant 10, la distance initiale e2 entre ceux-ci et ce filet se trouvant absorbée.In its action, the strip constituting the brake member 26 advantageously bears, by the axial edges of its lateral facets, on the thread 15 of the insulating body 10, the initial distance e 2 between these and this thread being absorbed.

L'effet de frein de la lamelle 26 s'en trouve amélioré, et conjointement, le travail en flexion de sa facette médiane se trouve soulagé.The brake effect of the lamella 26 is thereby improved, and jointly, the work in bending of its central facet is relieved.

Si désiré, les facettes latérales de la lamelle 26 peuvent être détachées du flasque de support 30 de celle-ci, seule la facette médiane de cette lamelle se trouvant dès lors en continuité avec ce flasque de support.If desired, the lateral facets of the lamella 26 can be detached from the support flange 30 thereof, only the middle facet of this lamella therefore being in continuity with this support flange.

Sur la figure 5, de telles facettes se trouvent nettement individualisées, sous les références 32 pour la facette médiane et 33 pour les facettes latérales.In FIG. 5, such facets are clearly individualized, under the references 32 for the middle facet and 33 for the lateral facets.

D'une manière générale, la lamelle 26 constituant l'organe frein selon l'invention peut présenter en saillie au moins une protubérance à action circonférentielle différenciée, établie de manière à s'opposer au dévissage de la lampe 28 tout en ne s'opposant pas à son vissage.In general, the strip 26 constituting the brake member according to the invention may have projecting at least one protuberance with differentiated circumferential action, established so as to oppose the unscrewing of the lamp 28 while not opposing not to its screwing.

Par exemple, figure 6, sa facette médiane 32 peut présenter deux ou trois crevés 35 orientés circonférentiellement dans un sens choisi pour correspondre au sens du vissage, tel que repéré par la flèche F sur cette figure 6.For example, in FIG. 6, its central facet 32 may have two or three punctures 35 oriented circumferentially in a direction chosen to correspond to the direction of screwing, as indicated by the arrow F in this FIG. 6.

En variante, figure 7, la facette 33 la plus en aval dans le sens du vissage présente en saillie une languette élastiquement déformable 36, choisie pour correspondre au sens de vissage F.As a variant, in FIG. 7, the facet 33 furthest downstream in the direction of screwing has a projecting elastically deformable tongue 36, chosen to correspond to the direction of screwing F.

Suivant la variante de réalisation illustrée par la figure 8, la lamelle 26 formant l'organe frein suivant l'invention se rattache à son flasque de support 30 par celui des bords circonférentiels de celui-ci qui est radialement le plus éloigné de l'axe de la bague filetée 17, et, après un coude 38 en forme de crosse, par lequel elle contourne la collerette radiale 18 de cette bague, elle s'étend axialement dans la découpe 25 de celle-ci.According to the variant embodiment illustrated in FIG. 8, the strip 26 forming the brake member according to the invention is attached to its support flange 30 by that of the circumferential edges thereof which is radially furthest from the axis of the threaded ring 17, and, after a bend 38 in the form of a butt, by which it bypasses the radial flange 18 of this ring, it extends axially in the cutout 25 thereof.

On appréciera que, dans tous les cas, le corps isolant 10 est de type ordinaire, et, que l'organe frein 26 n'implique aucune adaptation ou modification particulière de ce corps isolant 10, ni n'augmente en quoi que ce soit l'encom- brèment radial de l'ensemble.It will be appreciated that, in all cases, the insulating body 10 is of the ordinary type, and that the brake member 26 does not imply any particular adaptation or modification of this insulating body 10, nor does it increase in any way w 'radial bulk of the assembly.

Bien entendu, la présente invention ne se limite pas aux formes de réalisation décrites et représentées, mais englobe toute variante d'exécution et/ou de combinaison de leurs divers éléments.Of course, the present invention is not limited to the embodiments described and shown, but encompasses any variant embodiment and / or combination of their various elements.

En outre, si l'application de l'invention a été plus particulièrement décrite en référence à une douille de sécurité, c'est-à-dire à une douille dont le contact latéral de culot est distinct de la bague filetée de retenue, il n'en est pas nécessairement ainsi, cette bague filetée pouvant aussi bien, pour les douilles ordinaires, servir par elle-même de contact latéral.In addition, if the application of the invention has been more particularly described with reference to a safety socket, that is to say a socket whose lateral contact of base is distinct from the threaded retaining ring, it this is not necessarily so, this threaded ring being able as well, for ordinary sockets, to serve by itself as lateral contact.

Claims (5)

1. Douille à vis, du genre comportant, dans un corps isolant (10), une bague filetée (17), qui est propre à l'engagement à vissage du culot d'une lampe, et qui présente une découpe (25) à la faveur de laquelle un organe frein (26) fait saillie à l'intérieur de ladite bague filetée (17) et est ainsi propre à porter sur un tel culot, ledit organe frein (26) comportant une lamelle élastiquement déformable s'étendant aussi bien axialement que circonférentiellement vis-à-vis de la bague filetée à laquelle elle est associée, et la bague filetée (17) comportant radialement une collerette (18) par laquelle elle prend appui sur un épaulement (14) du corps isolant (10), caractérisée en ce que la lamelle formant l'organe frein (26) est solidaire d'un flasque de support (30) inséré entre ladite collerette (18) de la bague filetée (17) et ledit épaulement (14) du corps isolant (10).1. Screw socket, of the type comprising, in an insulating body (10), a threaded ring (17), which is suitable for the screw connection of the base of a lamp, and which has a cutout (25) to the favor of which a brake member (26) protrudes inside said threaded ring (17) and is thus suitable for bearing on such a base, said brake member (26) comprising an elastically deformable strip extending as well axially than circumferentially with respect to the threaded ring with which it is associated, and the threaded ring (17) comprising radially a flange (18) by which it bears on a shoulder (14) of the insulating body (10), characterized in that the strip forming the brake member (26) is integral with a support flange (30) inserted between said flange (18) of the threaded ring (17) and said shoulder (14) of the insulating body (10 ). 2. Douille à vis suivant la revendication 1, caractérisée en ce que ledit flasque de support (30) s'étend circulairement suivant un secteur circulaire d'ouverture au centre de préférence au moins égale à 180°.2. Screw socket according to claim 1, characterized in that said support flange (30) extends circularly along a circular sector of opening at the center preferably at least equal to 180 °. 3. Douille à vis suivant l'une quelconque des revendications 1, 2, caractérisée en ce que la lamelle formant l'organe frein (26) se rattache a son flasque de support(30) par celui des bords circonférentiels de celui-ci qui est radialement le plus proche de l'axe de la bague filetée (17) et elle traverse radialement la découpe (25) de celle-ci.3. Screw socket according to any one of claims 1, 2, characterized in that the lamella forming the brake member (26) is attached to its support flange (30) by that of the circumferential edges thereof which is radially closest to the axis of the threaded ring (17) and it crosses radially the cutout (25) thereof. 4. Douille à vis suivant l'une quelconque des revendications 1, 2, caractérisée en ce que la lamelle formant l'organe frein (26) se rattache à son flasque de support (30) par celui des bords circonférentiels de celui-ci qui est radialement le plus éloigné de l'axe de la bague filetée (17), et, après un coude en forme de crosse (38) par lequel elle contourne la collerette (18) de celle-ci, elle s'étend axialement dans la découpe (25) de ladite bague filetée (17).4. Screw socket according to any one of claims 1, 2, characterized in that the lamella forming the brake member (26) is attached to its support flange (30) by that of the circumferential edges thereof which is radially farthest from the axis of the threaded ring (17), and, after a crook-shaped elbow (38) by which it bypasses the flange (18) thereof, it extends axially in the cutout (25) of said threaded ring (17). 5. Douille à vis suivant l'une quelconque des revendications 1 à 4, caractérisée en ce que, circonférentiellement, la lamelle formant l'organe frein (26) est globalement cintrée, en étant convexe en direction de l'axe de la bague filetée (17).5. Screw socket according to any one of claims 1 to 4, characterized in that, circumferentially, the strip forming the brake member (26) is generally curved, being convex in the direction of the axis of the threaded ring (17).
EP79400726A 1978-10-27 1979-10-09 Screw-base lamp socket having braking means to oppose unscrewing of the lamp Expired EP0011008B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79400726T ATE1439T1 (en) 1978-10-27 1979-10-09 LAMP SCREW BASE WITH DEVICE TO PREVENT LAMP RELEASE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7830560A FR2440097A1 (en) 1978-10-27 1978-10-27 SCREW SOCKET
FR7830560 1978-10-27

Publications (2)

Publication Number Publication Date
EP0011008A1 true EP0011008A1 (en) 1980-05-14
EP0011008B1 EP0011008B1 (en) 1982-08-04

Family

ID=9214217

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79400726A Expired EP0011008B1 (en) 1978-10-27 1979-10-09 Screw-base lamp socket having braking means to oppose unscrewing of the lamp

Country Status (5)

Country Link
EP (1) EP0011008B1 (en)
AT (1) ATE1439T1 (en)
DE (1) DE2963505D1 (en)
ES (1) ES246454Y (en)
FR (1) FR2440097A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2246029A (en) * 1990-07-13 1992-01-15 Electronic Components Ltd Vibration-proof screw-ring electrical connector.
US5683271A (en) * 1994-04-25 1997-11-04 Leviton Manufacturing Co., Inc. Lampholder with means to reject incorrectly dimensioned lamps
WO2001028047A2 (en) * 1999-10-13 2001-04-19 Tobias Pader Jesus Eduardo Elastic socket for electrical items
CN100395924C (en) * 2006-02-20 2008-06-18 林家鹳 Modified lamp head conversion device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB206732A (en) * 1922-12-11 1923-11-15 Giuseppe Brambilla Improvements in safety locking apparatus for incandescent electric lamp sockets for preventing snatch-stealing of the lamps
US1936871A (en) * 1932-09-10 1933-11-28 William A Ervin Antitheft light socket
DE946375C (en) * 1952-07-26 1956-08-02 Vossloh Werke Gmbh Incandescent lamp socket with protection against loosening of the lamps by shock
FR1151075A (en) * 1956-05-30 1958-01-23 Improvements to screw connection brackets
DE1044962B (en) * 1955-08-29 1958-11-27 Siemens Ag Device to prevent incandescent lamps, fuses or the like from becoming loose.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB206732A (en) * 1922-12-11 1923-11-15 Giuseppe Brambilla Improvements in safety locking apparatus for incandescent electric lamp sockets for preventing snatch-stealing of the lamps
US1936871A (en) * 1932-09-10 1933-11-28 William A Ervin Antitheft light socket
DE946375C (en) * 1952-07-26 1956-08-02 Vossloh Werke Gmbh Incandescent lamp socket with protection against loosening of the lamps by shock
DE1044962B (en) * 1955-08-29 1958-11-27 Siemens Ag Device to prevent incandescent lamps, fuses or the like from becoming loose.
FR1151075A (en) * 1956-05-30 1958-01-23 Improvements to screw connection brackets

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2246029A (en) * 1990-07-13 1992-01-15 Electronic Components Ltd Vibration-proof screw-ring electrical connector.
US5683271A (en) * 1994-04-25 1997-11-04 Leviton Manufacturing Co., Inc. Lampholder with means to reject incorrectly dimensioned lamps
WO2001028047A2 (en) * 1999-10-13 2001-04-19 Tobias Pader Jesus Eduardo Elastic socket for electrical items
WO2001028047A3 (en) * 1999-10-13 2001-06-07 Pader Jesus Eduardo Tobias Elastic socket for electrical items
CN100395924C (en) * 2006-02-20 2008-06-18 林家鹳 Modified lamp head conversion device

Also Published As

Publication number Publication date
EP0011008B1 (en) 1982-08-04
FR2440097B1 (en) 1982-08-20
ATE1439T1 (en) 1982-08-15
DE2963505D1 (en) 1982-09-30
FR2440097A1 (en) 1980-05-23
ES246454U (en) 1980-04-01
ES246454Y (en) 1980-10-01

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