US3910668A - Socket for light bulb without threaded base - Google Patents

Socket for light bulb without threaded base Download PDF

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Publication number
US3910668A
US3910668A US443955A US44395574A US3910668A US 3910668 A US3910668 A US 3910668A US 443955 A US443955 A US 443955A US 44395574 A US44395574 A US 44395574A US 3910668 A US3910668 A US 3910668A
Authority
US
United States
Prior art keywords
bore
socket
grooves
envelope
housing
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 - Lifetime
Application number
US443955A
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English (en)
Inventor
Albert Wasmeier
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.)
Rafi Raimund Finsterholzl Elektrotechnische Spezialfabrik
Original Assignee
Rafi Raimund Finsterholzl Elektrotechnische Spezialfabrik
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 Rafi Raimund Finsterholzl Elektrotechnische Spezialfabrik filed Critical Rafi Raimund Finsterholzl Elektrotechnische Spezialfabrik
Application granted granted Critical
Publication of US3910668A publication Critical patent/US3910668A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01R33/05—Two-pole devices
    • H01R33/06—Two-pole devices with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other
    • H01R33/09—Two-pole devices with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other for baseless lamp bulb

Definitions

  • a socket for a light bulb with oppositely outwardly projecting wire ends comprises an insulating housing having a bore for insertion of the bulb, the bore being formed with two opposite, axially extending guide grooves open toward its insertion end.
  • Transverse slots in the housing, intersecting the guide grooves accommodate bent-over extremities of two terminal tabs secured to the outer housing surface, these extremities having arcuate contact edges centered on the bore axis which resiliently engage the glass envelope of the inserted bulb through its projecting wire ends received in the grooves, these wire ends having been bent back alongside the envelope in the first phase of insertion by engagement with a pair of oppositely sloping lands at the socket mouth.
  • the present invention relates to a socket of insulating material for small electric light bulbs without threaded base whose filament-supporting wires have bare ends projecting from opposite sides of a preferably cylindrical glass envelope and are brought into electric contact with respective terminal tabs in the socket.
  • the ends of the line wires have heretofore been soldered or sealed in the socket, the glass envelope of the bulb being provided, for instance, with a press base.
  • a socket housing of insulating material formed with a bore open at an insertion end for receiving an elongate, preferably cylindrical glass envelope of an electric light bulb with laterally projecting wire ends, this bore being provided with two diametrically opposite lateral grooves substantially parallel to the bore axis and open toward the insertion end or mouth of the socket.
  • the housing is further provided with two aligned slots, transverse to the bore axis, extending from opposite outer surfaces of the housingto the bore and intersecting its grooves.
  • a pair of resilient contact tabs secured to the housing at these outer surfaces, terminate in bent-over extremities freely traversing the slots and extending toward the axis across the grooves in the absence of an inserted bulb; upon insertion of such a bulb, its wire ends are bent back axially against the glass envelope and lodge in the lateral grooves where they are conductively engaged by the bent-over extremities.
  • the tabs are wider than the grooves .and their edges contacting the wire ends in these vide the socket mouth with oppositely sloping lands axially spaced from the transverse slots, these lands forming outwardly flared extensions of the groove bottoms.
  • FIG. 1 is a side view of an electric light bulb to be fitted into a socket according to my invention
  • FIGS. 24 are longitudinal sections through a socket in accordance with the present invention with the bulb of- FIG. 1 shown in different stages of insertion;
  • FIG. 5 is a cross-sectional view taken on the line VV of FIG. 4.
  • FIG. 1 I have shown a light bulb 1 whose cylindrical glass envelope is pinched at its lower end to form a foot 2.
  • a rounded transition region 3 the uninsulated end of a pair of filament-supporting wires 4 extend out of the bulb at diametrically opposite locations.
  • the socket shown in FIGS. 2-4 has a housing 5, made of insulating material, with outer lateral recesses 16 accomodating a pair of contact tabs 6 whichare made of elastic material, for instance spring bronze, and are fastened to the housing 5, for instance, by rivets 7.
  • the lower ends of the contact tabs extend out of the housing 5 so that connecting tongues 8 are formed.
  • the other end of each tab 6 is provided with a bent-over extremity 9 guided inwardly in a housing slot 10 which extends transversely to the direction of insertion E, i.e. to
  • a central bore 12 for the insertion of the bulb l by its foot 2 is provided in the housing 5.
  • This bore is provided with two diametrally opposite guide grooves 13 for the wires 4 which cross the slots 10 and whose bottoms 13 are provided at the insertion end with outwardly flared extensions in the form of bevels 14 inclined, for instance, at an angle of 45 to the axial direction E.
  • the two bent-over extremities 9 of tabs 10 intersect the guide grooves 13 and extend into the bore 12 in the absence of bulb 1, as shown in FIG. 2.
  • the line wires 4 are, first of all, bent outwardly to such an extent that they assume approximately the position shown in FIG. 2. Upon further insertion. a bending of the wires 4 takes place at the bevels 14, as shown in FIG. 3, the wires then coming into contact with stamped arcuate edges 15 of extremities 9 which in the repressed position of FIG. 5 are centered on the axis of bore 12 and whose radius therefore approximately equals that of the bore. As the contact tabs 6 are pressed outward (FIG. 4), their spring tension is increased and the contact between the tabs and the wires 4 is intensified.
  • biasing means such as screws for pressing the contact tabs against the bulb.
  • a socket for an electric light bulb having an elongate glass envelope and a pair of wire ends projecting from opposite sides of said envelope, comprising:
  • I a pair of resilient contact tabs secured to said housing at said outer surfaces and terminating in bent-over extremities yieldably traversing said slots and extending toward said axis across said grooves in the absence of said envelope for conductive engagement with said wire ends upon insertion of said envelope into said bore with said wire ends bent back axially against said envelope and received in said grooves.

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  • Connecting Device With Holders (AREA)
US443955A 1973-03-01 1974-02-20 Socket for light bulb without threaded base Expired - Lifetime US3910668A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2310151A DE2310151C3 (de) 1973-03-01 1973-03-01 Fassung für sockellose elektrische Kleinlampen

Publications (1)

Publication Number Publication Date
US3910668A true US3910668A (en) 1975-10-07

Family

ID=5873462

Family Applications (1)

Application Number Title Priority Date Filing Date
US443955A Expired - Lifetime US3910668A (en) 1973-03-01 1974-02-20 Socket for light bulb without threaded base

Country Status (3)

Country Link
US (1) US3910668A (de)
DE (1) DE2310151C3 (de)
FR (1) FR2220103B3 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4114972A (en) * 1976-06-23 1978-09-19 Trw Inc. Wedge base bulb socket
US4603278A (en) * 1984-02-16 1986-07-29 Gte Products Corporation Electric lamp with insulating base
US4724353A (en) * 1984-02-16 1988-02-09 Gte Products Corporation Electric lamp with insulating base
US4837479A (en) * 1984-02-16 1989-06-06 GTE Products Company Electric lamp with insulating base
EP0652610A1 (de) * 1993-11-04 1995-05-10 SUMITOMO WIRING SYSTEMS, Ltd. Lampenfassung

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2841114C3 (de) * 1978-09-21 1981-11-12 Norbert 5275 Bergneustadt Weiner Thermische Sicherung für elektrische Geräte
FR2468227A1 (fr) * 1979-10-19 1981-04-30 Lampes Elect Fab Reunies Support de lampe electrique sans culot
DE8120785U1 (de) * 1981-07-15 1982-12-23 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Anzeigeleuchte
DE3607958A1 (de) * 1986-03-11 1987-09-17 Maerklin & Cie Gmbh Geb Lampenfassung fuer spielfahrzeuge
AU639645B2 (en) * 1989-10-10 1993-07-29 Wm. Wrigley Jr. Company Gradual release structures made from fiber spinning techniques
DE19646523C2 (de) * 1996-11-12 1999-06-02 Molex Inc Sockel für elektrische oder elektronische Komponenten
DE19646715A1 (de) * 1996-11-12 1998-05-14 Molex Inc Leuchtmittelsockel

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3259868A (en) * 1963-10-11 1966-07-05 Imp Camera Corp Flash bulb holding means
US3702455A (en) * 1970-06-18 1972-11-07 Amp Inc Electrical connector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3259868A (en) * 1963-10-11 1966-07-05 Imp Camera Corp Flash bulb holding means
US3702455A (en) * 1970-06-18 1972-11-07 Amp Inc Electrical connector

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4114972A (en) * 1976-06-23 1978-09-19 Trw Inc. Wedge base bulb socket
US4603278A (en) * 1984-02-16 1986-07-29 Gte Products Corporation Electric lamp with insulating base
US4724353A (en) * 1984-02-16 1988-02-09 Gte Products Corporation Electric lamp with insulating base
US4837479A (en) * 1984-02-16 1989-06-06 GTE Products Company Electric lamp with insulating base
EP0652610A1 (de) * 1993-11-04 1995-05-10 SUMITOMO WIRING SYSTEMS, Ltd. Lampenfassung
US5538443A (en) * 1993-11-04 1996-07-23 Sumitomo Wiring Systems, Ltd. Bulb socket having edges that bite into leads of a bulb

Also Published As

Publication number Publication date
FR2220103A1 (de) 1974-09-27
DE2310151A1 (de) 1974-09-26
DE2310151B2 (de) 1975-03-13
DE2310151C3 (de) 1975-10-23
FR2220103B3 (de) 1976-12-03

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