EP0933839A2 - Douille d'ampoule de sécurité - Google Patents

Douille d'ampoule de sécurité Download PDF

Info

Publication number
EP0933839A2
EP0933839A2 EP99300125A EP99300125A EP0933839A2 EP 0933839 A2 EP0933839 A2 EP 0933839A2 EP 99300125 A EP99300125 A EP 99300125A EP 99300125 A EP99300125 A EP 99300125A EP 0933839 A2 EP0933839 A2 EP 0933839A2
Authority
EP
European Patent Office
Prior art keywords
bulb
pins
bayonet
socket
bulb holder
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.)
Withdrawn
Application number
EP99300125A
Other languages
German (de)
English (en)
Other versions
EP0933839A3 (fr
Inventor
Michael Rollin Burn
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.)
Light Years Ahead IPR Ltd
Original Assignee
Light Years Ahead IPR Ltd
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 Light Years Ahead IPR Ltd filed Critical Light Years Ahead IPR Ltd
Publication of EP0933839A2 publication Critical patent/EP0933839A2/fr
Publication of EP0933839A3 publication Critical patent/EP0933839A3/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/44—Means for preventing access to live contacts
    • H01R13/447—Shutter or cover plate
    • H01R13/453—Shutter or cover plate opened by engagement of counterpart
    • H01R13/4532—Rotating shutter
    • 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
    • H01R33/05—Two-pole devices
    • H01R33/46—Two-pole devices for bayonet type base

Definitions

  • This invention relates to safety bayonet-fitting light bulb holders.
  • Bayonet-fitting bulb holders are about as old as electric lighting itself and have not fundamentally changed since their introduction. They consist of a socket with bayonet pin receiving slots and a body holding sprung contact pins. These pins, with no bulb present, although within the socket, are nevertheless exposed and can be live without any means of telling, even with switched bulb holders.
  • the present invention provides an improved bayonet-fitting bulb holder which does not have the problems of the aforementioned prior art.
  • the invention comprises a bayonet-fitting bulb holder having a socket and a cover plate therein for the contact pins which has apertures for the pins and which is moved by the action of inserting a bulb so as to align the apertures with the pins and by the action of removing a bulb so as to cover the pins and comprising a locking arrangement preventing movement of the cover plate from the pin-covering position except by inserting a bulb or like member filling the socket.
  • the cover plate may move axially and rotate in the socket between the pin aligning and covering positions. Rotational movement may be permitted by the locking arrangement by a member urged radially outwardly on insertion of a bulb.
  • the cover plate may be the base of a cup member having a cylindrical wall and being journalled on a sub-plate which sub-plate is free to move axially but not to rotate in the socket and which has a notch into which fits an inwardly-biassed tongue of the cup member which is urged out of the notch on insertion of a bulb.
  • the tongue may be continuation of the cylindrical wall of the cup member, rooted therein and projecting below the base to the depth of the sub-plate.
  • the cup member and the sub-plate may form a unit having a depending spigot axially slidable in a bore of a contact pin sub-assembly.
  • the cylindrical wall of the cup member may be relieved to accept the bayonet pins of a bulb to effect rotation of the cover plate as the bulb is rotated in the socket on insertion and removal.
  • the bulb holder may have bayonet pin engagement slots extending through a quarter turn, and, indeed, this feature may be used independently of the safety feature, the subject ofthe above-disclosed invention.
  • An advantage ofthe quarter turn-extending bayonet slot is that it affords a shallow ramp which requires less insertion force and less liability to damage of the bayonet slots which can give rise to difficulties inserting and removing bulbs.
  • bulb holders are sometimes used as sockets for plugs which mimic the contact base of a bayonet fitting bulb - the holders of the present invention work with such plugs exactly, of course, as with bulbs themselves.
  • FIG. 1 illustrate a bayonet-fitting bulb holder 11 having a socket 13 and a cover plate 12 therein for the contact pins 16 which have apertures 15 for the pins 16 and which is moved by the action of inserting a bulb 14 so as to align the apertures 15 with the pins 16 and by the action of removing the bulb 14 so as to cover the pins 16, and comprising a locking arrangement 20 preventing movement of the cover plate 12 from the pin-covering position ( Figures 2, 6) except by inserting a bulb 14 or like member such as a bulb-mimicking plug filling the socket.
  • the cover plate 12 moves axially and rotates in the socket between the pin-aligning ( Figures 1, 5) and pin-covering ( Figures, 2 6) positions.
  • the cover plate 12 is the base of a cup member 23 - see particularly Figures 3 and 4 having a cylindrical wall 24 and being journalled on a sub-plate 25, which sub-plate 25 is free to move axially but not to rotate (by virtue of lugs 25a) in the socket 11 and which has a notch 26 - in fact, two diametrally opposite notches 26 - into which fits an inwardly-biassed tongue - the member 22 is the cup member 23 which urged out of the notch 26 on insertion of a bulb 14. There can be more than two such tongues 22 and notches 26 - the more there are, the more effective the locking arrangement 20.
  • the tongue 22 is a continuation of the cylindrical wall 24 of the cup member 23, rooted therein at 22a as a sprung hinge and projecting below the base - the cover plate 12 - to the depth of the sub-plate 25.
  • the cup member 23 and the sub-plate 25 for a unit - see particularly Figures 3 and 4 - having a depending spigot 21 axially slidable in a bore 28 of a contact pin sub-assembly 11a of the bulb holder 11.
  • the cover plate 12, sub-plate 25 unit is assembled, then dropped into the sub-assembly 11a where it is retained against removal (which would defeat the object) by a radially-inwardly directed step 19 on the socket 13.
  • the cylindrical wall 24 of the cup member 23 is relieved at 24a to accept the bayonet pins 14a of a bulb 14 to effect rotation of the cover plate as the bulb 14 is rotated in the socket 14 on insertion and removal.
  • the relieving at 24a is designed to operate with an improved bayonet action in which the bayonet pin engaging tracks 18 of the socket 13 are ramped and extend through a quarter turn, as is seen in the developed profile in Figures 1 and 2.
  • This ramped track facilitates easier insertion and removal of the bulb with reduced risk of damage to an consequent malfunction of the track as compared with a conventional "J" shaped track extending over a fraction of that and requiring a substantially axial insertion with a short twist before the sprung contact pins push the bulb back.
  • the ramped track can be used even without the cover plate arrangement. However, when used with it, the angular extent of the relieving at 24a is equal to that of the track 18 less required rotation of the cover plate 12 to give access to the pins 16.

Landscapes

  • Fastening Of Light Sources Or Lamp Holders (AREA)
EP99300125A 1998-01-28 1999-01-07 Douille d'ampoule de sécurité Withdrawn EP0933839A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9801682 1998-01-28
GBGB9801682.7A GB9801682D0 (en) 1998-01-28 1998-01-28 Safety bulb holder

Publications (2)

Publication Number Publication Date
EP0933839A2 true EP0933839A2 (fr) 1999-08-04
EP0933839A3 EP0933839A3 (fr) 2000-05-17

Family

ID=10825950

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99300125A Withdrawn EP0933839A3 (fr) 1998-01-28 1999-01-07 Douille d'ampoule de sécurité

Country Status (2)

Country Link
EP (1) EP0933839A3 (fr)
GB (1) GB9801682D0 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003043141A1 (fr) * 2001-11-14 2003-05-22 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung Appareil d'eclairage comportant un dispositif de protection contre les decharges electriques et procede pour assurer une protection contre les decharges electriques dans des lampes allumees
WO2012075357A2 (fr) 2010-12-03 2012-06-07 Ideal Industries, Inc. Dispositif de maintien de source lumineuse

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2337954A1 (fr) * 1976-01-06 1977-08-05 Bonnet Robert Douille pour lampe a baionnette
WO1987004867A1 (fr) * 1986-02-06 1987-08-13 Kudos Lighting Limited Douille

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2337954A1 (fr) * 1976-01-06 1977-08-05 Bonnet Robert Douille pour lampe a baionnette
WO1987004867A1 (fr) * 1986-02-06 1987-08-13 Kudos Lighting Limited Douille

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003043141A1 (fr) * 2001-11-14 2003-05-22 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung Appareil d'eclairage comportant un dispositif de protection contre les decharges electriques et procede pour assurer une protection contre les decharges electriques dans des lampes allumees
WO2012075357A2 (fr) 2010-12-03 2012-06-07 Ideal Industries, Inc. Dispositif de maintien de source lumineuse
EP2646749A2 (fr) * 2010-12-03 2013-10-09 Ideal Industries Inc. Dispositif de maintien de source lumineuse
EP2646749A4 (fr) * 2010-12-03 2014-07-23 Ideal Ind Dispositif de maintien de source lumineuse
US9739457B2 (en) 2010-12-03 2017-08-22 Ideal Industries, Inc. Device for holding a source of light

Also Published As

Publication number Publication date
EP0933839A3 (fr) 2000-05-17
GB9801682D0 (en) 1998-03-25

Similar Documents

Publication Publication Date Title
US5286213A (en) Locking receptacle
US20020173187A1 (en) Electrical plug-in adapter
CA2246439A1 (fr) Prise electrique femelle a mise a la terre de protection et elements recepteurs de prise male se repositionnant
JPH05217645A (ja) 電気的接続用選択装置
CA2873635A1 (fr) Raccord de branchement electrique comportant une partie de prise dotee de broches de contact servant a brancher des contacts de prise femelle dans une piece de prise femelle
JPH08502398A (ja) コードレス機器のための充電ユニット
EP0646990B1 (fr) Perfectionnements aux dispositifs de sécurité et/ou de discrimination pour prises de courant
EP0838185A1 (fr) Machine à café express
EP0933839A2 (fr) Douille d'ampoule de sécurité
AU671699B2 (en) Safety lampholder for a bayonet bulb
CN1332111C (zh) 用于保险箱的卡扣式锁保持系统
US7066758B2 (en) Electrical socket
GB2126805A (en) Electrical plug
CA1283465C (fr) Douille de lampe
US7325965B2 (en) Locking socket for biax plug-in lamp
GB2279825A (en) Lampholder
EP1079474B1 (fr) Système à fiches à détrompeur
GB2261774A (en) A connector/adaptor
GB2264402A (en) Two-component lampholder
KR0125092Y1 (ko) 전원 콘센트의 안전장치
GB2280550A (en) Lampholder
WO1996023333A1 (fr) Prise electrique male universelle
GB2288925A (en) Lampholder
GB2221804A (en) Lampholder with locking shutter
US1698449A (en) Plug receptacle

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

RIC1 Information provided on ipc code assigned before grant

Free format text: 7H 01R 33/965 A

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

AKX Designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20001118