US3265922A - Electric lamp - Google Patents

Electric lamp Download PDF

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Publication number
US3265922A
US3265922A US143142A US14314261A US3265922A US 3265922 A US3265922 A US 3265922A US 143142 A US143142 A US 143142A US 14314261 A US14314261 A US 14314261A US 3265922 A US3265922 A US 3265922A
Authority
US
United States
Prior art keywords
lamp
exhaust tube
current supply
contact
tube
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
US143142A
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 US3265922A publication Critical patent/US3265922A/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

Definitions

  • the invention relates to an electric lamp provided with a centre contact and a side contact structurally separated from this centre contact, each of which contacts is connected to one of the current supply wires extending towards the lamp pinch, which lamp further comprises an exhaust tube surrounded by a stem tube.
  • the present invention relates to an improvement in the centre contact of such an electric lamp.
  • the lamp may be an electric incandescent lamp, but also a lamp in which a discharge tube acts as the light-emitting member.
  • the lamp concerned will generally have a lamp cap which is constructed so that such a lamp may be secured in a screw-holder.
  • a lamp of the above-mentioned kind is characterized in that the centre contact of the lamp is supported by a part of the exhaust tube which preferably projects from the lamp vessel.
  • the exhaust tube of the lamp has consequently obtained a new function in the construction of the lamp.
  • the exhaust tube projects from the lamp vessel, the provision of the centre contact thereon does not entail any difficulty.
  • the centre contact consists of a hoodshaped body arranged on the exhaust tube, to which body the end of one of the current supply wires is secured.
  • This hood-shaped body may, for example, consist of a drawn metal sleeve, such as a brass or aluminum sleeve.
  • the centre contact arranged on the exhaust tube comprises parts which bear on the inner side of the stern tube. In this manner, this body is given a certain lateral support which substantially eliminates the risk of damage to the exhaust tube by transverse stresses.
  • one of the current supply wires extends within the exhaust tube from the centre contact secured to the exhaust tube towards the lamp pinch. In this manner, the two current supply wires within the stem tube are automatically insulated from each other. In certain cases, no additional precautions need be taken to prevent breakdown between these two wires which 3,265,922 Patented August 9, 1966 may be constructed so as to form a lamp fuse when an arc is struck in the lamp.
  • the side contact may be constructed in different manners.
  • This side contact may, for example, consist of a thin metal sheath provided with a helical profile, which sheath may be screwed on the glass lamp neck with the aid of screw-thread which is impressed in this neck.
  • an electrically conductive layer may be applied, for example by spraying.
  • the helically wound profile on the lamp-neck may also be rendered electrically conductive with the aid of. a layer of tin oxide. Part of the current supply wire extending along the bulb neck may be connected to such a layer by means of another electrically conductive layer.
  • an at least superficially electrically conductive foil which consists of so thin a material that it may be pressed into the profile by means of a suitable tool, for example a roller or a pair of tongs, the material itself then assuming the profile of the neck.
  • a suitable tool for example a roller or a pair of tongs
  • Such a foil may consist of brass or aluminum.
  • one of the current supply wires extends within the exhaust tube.
  • both current supply wires extend in the space between the stern tube and the exhaust tube.
  • a filament 2 is inserted into a bulb 1, which filament is secured to the ends of current supply wires 3 and 4.
  • these wires terminate in lengths of copper-clad wires 6 and 7.
  • the length of wire 6 extends straight through the pinch into the space between an exhaust tube 8 and a stem tube 9.
  • the wire part 10 concerned is then stretched tautly across an end face 11 of the lamp and passed along a glass neck part 13 provided with screw-thread 12.
  • a part 14 of this current supply wire is disposed between the outer surface of this bulb neck 13 and the inner surface of a thin brass cap 15 screwed thereon.
  • An end 16 of the current supply wire is then bent back and secured to the sheath 15 by means of solder 17.
  • the length 7 of copper-clad wire is bent over zigzagwise in the pinch 5 so that a second current supply wire 18 secured thereto lies inside the exhaust tube 8.
  • this part of the current supply wire lying inside the exhaust tube 8 is constructed so as to form a lamp fuse, it is preferably surrounded by an additional close fitting glass tube.
  • This part 18 passes through an end 19 of the exhaust tube 8, which is closed in the usual gas-tight manner and then through a small aperture 20 in a metal cap 21 which bears on the end 19 of the exhaust tube with the interposition of a slight amount of cement.
  • the end of the wire is secured to the outer surface of the bottom of the cap 21 by means of a quantity of solder 22.
  • both copper-clad wires 31 and 32 are straight and consequently extend in a pinch 33 in the same manner as in conventional incandescent lamps. Consequently, both wires pass through the space between an exhaust tube 34 and a stem tube 35.
  • a wire part 36, which is secured to the copper-clad wire 31, is in this case also stretched tautly across an end face 37 of the lamp, then guided downwards along the outer surface of a screwed bulb neck 38 and fixed to a conductive layer 40 by means of solder 39, which layer is provided on the screwed lamp neck 38.
  • This conductive layer is provided on the bulb neck, for example, by spraying and may consist of finely divided aluminum.
  • the bulb neck 38 may be provided with an axially extending recessed part 41 shown in dotted lines, in which the portion of the current supply wire 36 situated on the outer surface of the lamp neck may be disposed.
  • the other current supply wire 42 is in this embodiment guided along the exhaust tube and clamped between the inner side of a metal sleeve 43 and a sealed end 44 of the exhaust tube 34.
  • This metal sleeve 43 may be secured to the end 44 of the exhaust tube by means of cement. If desired, an intimate contact between the end of the current supply wire and the material of the metal sleeve may thus be achieved, so that it is not necessary for this wire to be soldered to the sleeve.
  • This metal sleeve 43 may be secured to the end 44 of the exhaust tube by means of cement.
  • the bottom of the sleeve 43 is provided with an aperture 45 through which the end of the current supply wire 42 passes. This end may be secured to the outer surface of the bottom of the metal sleeve by means of a drop of solder 46.
  • the lower end of the sleeve 43 terminates in a flange 47 consisting of insulating material.
  • the outer circumference of this flange bears on the inner side 48 of the conical surface which leads to the space between the exhaust tube 34 and the stem tube 35.
  • one or both current supply wires 36 and 42 may be constructed so as to form lamp fuses.
  • the space between the stem tube and the exhaust tube may be filled wholly or in part with a material of high quenching activity.
  • An electric lamp comprising a lamp bulb having a lamp neck including a hollow, annular-shaped stem tube, a filament in said lamp bulb, a center contact, a side contact structurally separate from said center contact, current supply wires connecting said filament with said contacts, a lamp pinch supporting said current supply Wires, and an exhaust tube located in the hollow of said stem tube, said center contact being supported by a part of said exhaust tube.
  • center contact comprises a hood-shaped body secured to the free end of said exhaust tube and having the end of one of said current supply wires being connected thereto.
  • An electric lamp comprising a lamp bulb having a lamp neck including a hollow, annular-shaped stem tube, a filament in said lamp bulb, a center contact, a side contact and on said stem tube structurally separate from said center contact, current supply wires connecting said filament with said contacts, a lamp pinch supporting said current supply wires, and an exhaust tube being located in the hollow of said stem tube, said center contact being supported by a part of said exhaust tube and having a metal sleeve over the free end of said exhaust tube and provided with parts bearing on the inner surface of said stem tube, one end of one of said current supply wires being connected to said center contact.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
US143142A 1960-10-24 1961-10-05 Electric lamp Expired - Lifetime US3265922A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL257189 1960-10-24

Publications (1)

Publication Number Publication Date
US3265922A true US3265922A (en) 1966-08-09

Family

ID=19752656

Family Applications (1)

Application Number Title Priority Date Filing Date
US143142A Expired - Lifetime US3265922A (en) 1960-10-24 1961-10-05 Electric lamp

Country Status (7)

Country Link
US (1) US3265922A (es)
CH (1) CH396206A (es)
DE (1) DE1903095U (es)
ES (1) ES271404A1 (es)
FR (1) FR1304416A (es)
GB (1) GB918753A (es)
NL (1) NL257189A (es)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857056A (en) * 1973-10-26 1974-12-24 Gen Motors Corp Wedge base light bulb
US4020382A (en) * 1975-12-19 1977-04-26 North American Philips Corporation Lamp having screw base
US4061943A (en) * 1976-08-16 1977-12-06 Gte Sylvania Incorporated Cathode ray tube with supported conductor extending through exhaust tubulation
WO1997015940A2 (en) * 1995-10-26 1997-05-01 Philips Electronics N.V. Capped electric lamp
US5698935A (en) * 1994-04-25 1997-12-16 Leviton Manufacturing Co., Inc. Lampholder system with mogul base

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US770223A (en) * 1904-03-17 1904-09-13 Francis M F Cazin Incandescent-lamp bulb.
US1988290A (en) * 1933-04-15 1935-01-15 Gen Electric Incandescent lamp and similar device
US2153398A (en) * 1936-10-03 1939-04-04 Gen Electric Electric lamp
US2188298A (en) * 1937-07-02 1940-01-30 William J Hitchcock Seal for evacuated devices
US2950417A (en) * 1958-08-08 1960-08-23 Gen Electric Series electric lamp

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US770223A (en) * 1904-03-17 1904-09-13 Francis M F Cazin Incandescent-lamp bulb.
US1988290A (en) * 1933-04-15 1935-01-15 Gen Electric Incandescent lamp and similar device
US2153398A (en) * 1936-10-03 1939-04-04 Gen Electric Electric lamp
US2188298A (en) * 1937-07-02 1940-01-30 William J Hitchcock Seal for evacuated devices
US2950417A (en) * 1958-08-08 1960-08-23 Gen Electric Series electric lamp

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857056A (en) * 1973-10-26 1974-12-24 Gen Motors Corp Wedge base light bulb
US4020382A (en) * 1975-12-19 1977-04-26 North American Philips Corporation Lamp having screw base
US4061943A (en) * 1976-08-16 1977-12-06 Gte Sylvania Incorporated Cathode ray tube with supported conductor extending through exhaust tubulation
US5698935A (en) * 1994-04-25 1997-12-16 Leviton Manufacturing Co., Inc. Lampholder system with mogul base
WO1997015940A2 (en) * 1995-10-26 1997-05-01 Philips Electronics N.V. Capped electric lamp
WO1997015940A3 (en) * 1995-10-26 1997-06-26 Philips Electronics Nv Capped electric lamp
CN1097281C (zh) * 1995-10-26 2002-12-25 皇家菲利浦电子有限公司 带帽的电灯

Also Published As

Publication number Publication date
DE1903095U (de) 1964-10-29
FR1304416A (fr) 1962-09-21
GB918753A (en) 1963-02-20
CH396206A (de) 1965-07-31
NL257189A (es)
ES271404A1 (es) 1962-03-16

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