US3162502A - Electric lamp base construction - Google Patents

Electric lamp base construction Download PDF

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Publication number
US3162502A
US3162502A US126732A US12673261A US3162502A US 3162502 A US3162502 A US 3162502A US 126732 A US126732 A US 126732A US 12673261 A US12673261 A US 12673261A US 3162502 A US3162502 A US 3162502A
Authority
US
United States
Prior art keywords
lamp
lamp base
foil
current supply
electric 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.)
Expired - Lifetime
Application number
US126732A
Other languages
English (en)
Inventor
Verbeek Leo Henricus
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.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips Corp
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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3162502A publication Critical patent/US3162502A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/42—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp
    • H01K1/46—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp supported by a separate part, e.g. base, cap
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S439/00—Electrical connectors
    • Y10S439/931—Conductive coating

Definitions

  • the invention relates to an electric lamp, which is provided with a central contact and a side contact which is structurally separated from said center contact, which contacts are each connected to one of the current supply wires extending towards the pinch, and in which the neck of the lamp is provided with a pressed-in, possibly interrupted, helical profile.
  • the central contact and the side contact constitute structurally separated members in contrast with what is usual in the normal commercial incandescent lamps.
  • the present invention relates to an improvement of the side contact of an electric lamp.
  • a lamp may be an electric incandescent lamp but also a lamp in which a discharge tube is the light-emitting member.
  • the lamp in question is provided with a lamp cap which is con structed so that such a lamp may be screw-connected to a lampholder.
  • the lamp of the above type is characterized in that around the profiled part of the neck of the lamp a thin material foil pressed in this profile and having at least one electrically conduc tive surface is provided, one of the current supply Wires, extending towards the pinch, being connected in an electrically conductive manner to this foil.
  • the foil preferably consists of metal, for example aluminum, and has a thickness of at most 100 microns, preferably at most 50 microns.
  • the neck of the envelope is provided with a groove extending substantially parallel to the axis of the lamp, in which groove one of the current supply wires is situated. In this manner, there is no danger that the wire is not damaged when engaging and disengaging respectively the lamp manufactured in this manner into and out of the associated lampholder.
  • the part of the current supply wire extending along the neck of the lamp and surrounded by the ends of the foil may be situated in the groove in the neck of the lamp.
  • FIG. 1 is a longitudinal sectional view of the upper part of an electric lamp according to the invention
  • FIGS. 2, 3 and 4 show three stages of the manufacture of the side contact in the lamp according to the invention.
  • the neck 2 of the envelope and the edge 3 of the stem 4 projecting outwards are fused together at the end face 1 of the envelope. After fusing, a helical profile 5 is compressed into the glass neck 2 of the envelope.
  • the current supply wires are provided in the pinch 6 of the lamp.
  • the current supply wire 7 leads to the central contact 8.
  • the current supply wire 9 is connected to the side contact of the lamp.
  • the exhaust tube 10 is provided inside the stem 4.
  • the central contact 8 which comprises a metal bushing 9a, containing the end of the current supply wire '7 which is attached to said bushing by means of a drop of solder, is supported by a cap 11 of insulating material provided with a bore. This cap is attached to the end face 1 of the envelope by means of cement or an adhesive 12.
  • the side contact separated structurally from this central contact comprises a strip of aluminum foil 14 having a thickness of approximately 50 microns.
  • this strip 14 in this embodiment is provided around the neck of the lamp 2., which, for clearness sake, is shown circular, in a manner such that the ends 15 and 16 of this strip approximately coincide.
  • the end 17 of the current supply wire 9 is now made to engage the end 16 of the strip (or is provided between the two strips).
  • the ends 16 and 17 of the foil 14 are provided around the wire 17, the resulting assembly is rolled, stretched tightly around the neck of the lamp and the resultingroll is provided in a groove 18 which is compressed in the neck of the lamp 2 and which extends in that neck in the longitudinal direction of the lamp.
  • this foil is deformed, by means of a tool not shown, for example a pair of tongs or a punch, so that it locally engages the screw thread on the neck of the lamp, in which manipulation the foil i permanently deformed.
  • a tool not shown for example a pair of tongs or a punch
  • the foil firmly engages the surface of the neck of the lamp. It has appeared that by this manipulation the end 17 of the wire is so firmly held by the foil that neither for the electric contact, nor for its mechanical attachment is it strictly necessary to use a soldering or welding connection between the end of this wire and the foil.
  • An electric lamp base construction provided with a pair of current supply wires'comprising a lamp base having a central contact and a peripheral groove therein, a lamp cap shell portion being structural separate from said lamp base and constituting a thin foil pressed into engagement with the periphery of said lamp base and having at least one conductive surface, one of said current supply members being'connected to said central contact, and a side conductor connected to the other of said current supply wires and electrically connected to the end parts of said foil, said side conductorrand end parts of said foil, being located in said peripheral groove of said lamp base.
  • An electric lamp base construction provided with a pairof current supply wires comprising a lamp base having a central contact and a peripheral groove therein,

Landscapes

  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
US126732A 1960-05-02 1961-04-26 Electric lamp base construction Expired - Lifetime US3162502A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL251140 1960-05-02

Publications (1)

Publication Number Publication Date
US3162502A true US3162502A (en) 1964-12-22

Family

ID=19752309

Family Applications (1)

Application Number Title Priority Date Filing Date
US126732A Expired - Lifetime US3162502A (en) 1960-05-02 1961-04-26 Electric lamp base construction

Country Status (7)

Country Link
US (1) US3162502A (es)
CH (1) CH392685A (es)
DE (1) DE1258979B (es)
ES (1) ES266998A1 (es)
GB (1) GB976634A (es)
NL (1) NL105845C (es)
OA (1) OA00756A (es)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4020382A (en) * 1975-12-19 1977-04-26 North American Philips Corporation Lamp having screw base
FR2558009A1 (fr) * 1984-01-09 1985-07-12 Philips Nv Lampe electrique presentant un pincement applique dans un culot en forme de douille

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1437723A (en) * 1920-10-28 1922-12-05 Daniel R Coughlin Theftproof electric-light bulb
US1650289A (en) * 1926-12-10 1927-11-22 James B Mcginley Incandescent electric lamp
US1794877A (en) * 1928-03-26 1931-03-03 Kulp Theftproof Lamp Company Theftproof-lamp construction

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB354271A (en) * 1929-05-24 1931-08-04 Gen Electric Co Ltd Improvements in the manufacture of electric incandescent lamps
US1925986A (en) * 1932-11-25 1933-09-05 Gen Electric Electric lamp or similar device
DE749962C (de) * 1940-07-07 1944-12-08 Verfahren zur Herstellung der das Elektrodensystem von elektrischen Gluehlampen, Elektronenroehren u. dgl. einschliessenden Glashuelle
US2359483A (en) * 1942-10-17 1944-10-03 Gen Electric Vitreous electrical device and its fabrication
US2385634A (en) * 1943-07-21 1945-09-25 Gen Electric Base for electric lamps or similar devices

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1437723A (en) * 1920-10-28 1922-12-05 Daniel R Coughlin Theftproof electric-light bulb
US1650289A (en) * 1926-12-10 1927-11-22 James B Mcginley Incandescent electric lamp
US1794877A (en) * 1928-03-26 1931-03-03 Kulp Theftproof Lamp Company Theftproof-lamp construction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4020382A (en) * 1975-12-19 1977-04-26 North American Philips Corporation Lamp having screw base
FR2558009A1 (fr) * 1984-01-09 1985-07-12 Philips Nv Lampe electrique presentant un pincement applique dans un culot en forme de douille

Also Published As

Publication number Publication date
ES266998A1 (es) 1961-08-16
GB976634A (en) 1964-12-02
OA00756A (fr) 1967-07-15
NL105845C (es)
CH392685A (de) 1965-05-31
DE1258979B (de) 1968-01-18

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