EP0011008B1 - Douille à vis pour lampe comportant un organe frein pour s'opposer à un devissage de la lampe - Google Patents

Douille à vis pour lampe comportant un organe frein pour s'opposer à un devissage de la lampe Download PDF

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Publication number
EP0011008B1
EP0011008B1 EP79400726A EP79400726A EP0011008B1 EP 0011008 B1 EP0011008 B1 EP 0011008B1 EP 79400726 A EP79400726 A EP 79400726A EP 79400726 A EP79400726 A EP 79400726A EP 0011008 B1 EP0011008 B1 EP 0011008B1
Authority
EP
European Patent Office
Prior art keywords
screw
ring
screwthreaded ring
insulating body
base
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.)
Expired
Application number
EP79400726A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0011008A1 (fr
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/de
Publication of EP0011008A1 publication Critical patent/EP0011008A1/fr
Application granted granted Critical
Publication of EP0011008B1 publication Critical patent/EP0011008B1/fr
Expired legal-status Critical Current

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Classifications

    • 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, comprise, in an insulating body, most often made of porcelain of so-called electrotechnical quality, 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 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 in favor 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.
  • Figures 6 and 7 are views similar to that of Figure 5 and each appropriate respectively 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.
  • 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 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 has in practice 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 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 carrying on the base 27 of a lamp with screw base 28 when this lamp is engaged by screwing in the converné socket.
  • 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 along 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 1 , FIG. 2.
  • the radial projection e 1 is such that the distance D 4 to the diametrically opposite thread bottom of the retaining ring 17 is less than the diameter D3 of the base 27 of the lamp 28.
  • the lamella 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.

Landscapes

  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Connecting Device With Holders (AREA)
  • Motor Or Generator Frames (AREA)
EP79400726A 1978-10-27 1979-10-09 Douille à vis pour lampe comportant un organe frein pour s'opposer à un devissage de la lampe Expired EP0011008B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79400726T ATE1439T1 (de) 1978-10-27 1979-10-09 Lampenschraubsockel mit einer vorrichtung zur verhinderung des loesens der lampe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7830560A FR2440097A1 (fr) 1978-10-27 1978-10-27 Douille a vis
FR7830560 1978-10-27

Publications (2)

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

Family

ID=9214217

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79400726A Expired EP0011008B1 (fr) 1978-10-27 1979-10-09 Douille à vis pour lampe comportant un organe frein pour s'opposer à un devissage de la lampe

Country Status (5)

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

Families Citing this family (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.
CA2147531C (en) * 1994-04-25 2006-03-14 Walter Newman Lampsocket with means to reject incorrectly dimensioned lamps
WO2001028047A2 (es) * 1999-10-13 2001-04-19 Tobias Pader Jesus Eduardo Socket elastico para articulos electricos
CN100395924C (zh) * 2006-02-20 2008-06-18 林家鹳 灯头转换装置
RU2343585C1 (ru) * 2007-12-24 2009-01-10 Игорь Юрьевич Медведев Лампа с защитой от несанкционированного выкручивания

Family Cites Families (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 (de) * 1952-07-26 1956-08-02 Vossloh Werke Gmbh Gluehlampenfassung mit Sicherung gegen das Loesen der Lampen durch Erschuetterung
DE1044962B (de) * 1955-08-29 1958-11-27 Siemens Ag Vorrichtung zur Verhinderung des Lockerwerdens von Gluehlampen, Sicherungen od. dgl.
FR1151075A (fr) * 1956-05-30 1958-01-23 Perfectionnements aux supports de connexion à vis

Also Published As

Publication number Publication date
FR2440097A1 (fr) 1980-05-23
FR2440097B1 (enrdf_load_stackoverflow) 1982-08-20
EP0011008A1 (fr) 1980-05-14
ES246454Y (es) 1980-10-01
DE2963505D1 (en) 1982-09-30
ATE1439T1 (de) 1982-08-15
ES246454U (es) 1980-04-01

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