US3535577A - Tubular electric incandescent lamp with filament and current supply wires spaced from tube walls - Google Patents

Tubular electric incandescent lamp with filament and current supply wires spaced from tube walls Download PDF

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Publication number
US3535577A
US3535577A US682792A US3535577DA US3535577A US 3535577 A US3535577 A US 3535577A US 682792 A US682792 A US 682792A US 3535577D A US3535577D A US 3535577DA US 3535577 A US3535577 A US 3535577A
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US
United States
Prior art keywords
lamp
filament
bulb
incandescent lamp
terminal
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
US682792A
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English (en)
Inventor
Victor Rosallie Notelteirs
Franciscus Ludovicus Wijnen
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
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 US3535577A publication Critical patent/US3535577A/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
    • H01K5/00—Lamps for general lighting
    • H01K5/02—Lamps for general lighting with connections made at opposite ends, e.g. tubular lamp with axially arranged filament
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels

Definitions

  • An electric incandescent lamp formed as a U-shaped tubular bulb defining a base and two legs, has terminal wires disposed in the legs and a filament disposed in the base. The remote end of each terminal wire extends through a seal at a free end of a leg and the junction end of each wire is supported by a resilient element and maintained spaced from the tube walls.
  • the invention relates to an electric incandescent lamp having a tubular approximately U-shaped bulb, in which a filament is stretched in the bulb part interconnecting the limbs of the U between two terminal wires which are each disposed mainly in one of the limbs of o the U and are passed out of the bulb through a seal at the free end of each of the limbs.
  • Lamps of this kind have the advantage that, it they are arranged in a row one beside the other, the so-called dead space between the ends of their filaments need be only small. This is of special importance for lamps having a high absorption power, since the terminal wires of these lamps must be comparatively long so that the temperature at the terminal seals can be kept sufiiciently low.
  • the limbs of the U may also be passed through a wall of a lighting fitting in which the relevant lamp is arranged, so that these seals are even more satisfactorily protected from heat and from the resulting oxidation of the terminal wire ends.
  • the terminal seals have the form of pinches, and moreover a further pinch is provided at each of the two angular points constituting the transitions between the bulb part comprising the filament and the limbs of the U.
  • These further pinches constitute the second support of each of the two terminal wires, which support mainly absorbs the mechanical load exerted by the filament on the terminal wires in the operative and in the inoperative condition of the lamp.
  • this known lamp is shaped into the form of a U by bending the originally rectilinear bulb at these further pinches heated for this purpose together with the parts of the terminal wires lying in the pinches.
  • This known lamp construction has the disadvantage that special expansion curvatures must be provided in the parts of the terminal wires disposed in the limbs of the U in order to prevent breaking of the glass at one or more of the four pinches of the lamp in the manufacture of the lamp during cooling after the bending process described above.
  • This known construction is moreover not particularly suitable for lamps having a high absorption power, for example, of 10 to kw.
  • the parts of the terminal wires to be disposed in the terminal pinches and flattened to foils must have such a large 3,535,577 Patented Get. 20, 1970 cross-section that great difiiculties would be involved in sealing these foils in a gas-tight manner.
  • the invention has for an object to obviate these disadvantages and relates to an electric incandescent lamp of the kind mentioned in the preamble which, according to the present invention, is characterized in that the terminal wires are free of the inner side of the bulb also at the angular points or bends of the U and are each supported at a point lying between the angular points and the seals by a resilient member on the inner side of the bulb.
  • the advantage is obtained that the ends of the terminal wires mechanically laterally loaded by the filament can be freely deformed inside the bulb walls so that at least this load does not give rise to breaking of the bulb at its angular points.
  • the terminal wires are nevertheless supported by the resilient members so that the end seals of the terminal wires (which may be bead seals) need absorb this load only to a very small extent so that also in this case the risk of breaking of'the bulb is strongly reduced.
  • the terminal wires can be deformed freely in their longitudinal direction so that auxiliary means, such as expansion curvatures, are superfluous.
  • a favourable embodiment of the electric incandescent lamp according to the invention is characterized in that a resilient member comprises a substantially helically wound wire having one or more turns tightly surrounding a terminal wire and one or more adjoining turns of larger diameter which fit into the tubular bulb with a small amount of clearance.
  • the U-shaped lamp shown has a tubular bulb or central part 1 interconnecting the twolikewise tubular limbs or legs 2 of the U.
  • a terminal wire '5 having a body part between a junction end and a remote end.
  • the filament 6 of the lamp is secured by its ends 7 to the junction ends of the terminal wires 5 and is further supported at a few points by disc-shaped or helical supporting members 8 on the inner side of the bulb part 1.
  • the terminal wires 5 are secured at their remote ends by so-called bead seals in the free ends 4 of the bulb limbs 2.
  • the heads 3 fused to the wires 5 may be made of a kind of glass having a coefficient of expansion lying between the coeflicients of expansion of the material of the terminal wires 5 and of the glass of which the bulb parts 1 and 2 are mainly made. This is of special importance if the latter coefiicients are relatively strongly different.
  • the tube ends 4 may also be built up of rings made of various kinds of glass so that the coefiicient of 3 expansion of a glass ring each time lies between the coefficients of expansion of the adjacent parts of the lamp.
  • a member 9 comprises a substantially helically wound wire having a few turns 11 tightly surrounding a terminal Wire 5 and a few adjoining turns 10 of larger diameter which fit into the tubular bulb with a small amount of clearance. The members 9 are locked against displacement by small local depressions 12 in the bulb.
  • the lamp shown further includes the seals 13 of the exhaust tubes used in the manufacture for exhausting the lamp and/or filling it with gas.
  • a double-ended electric incandescent lamp comprising:
  • each wire (0) a terminal wire disposed within each leg, each wire having a junction end in the proximity of a bend, a body part along the length of the leg, and a remote part extending through the seal, with the body part and junction end of the wire spaced from the inner walls of the leg and the bend,
  • said resilient member is a substantially helically 4 wound wire having at least one turn tightly grasping a portion of said terminal wire, and at least one adjoining turn of larger diameter which engages the inner wall of said leg of the U-shaped bulb.
  • An electric incandescent lamp as claimed in claim 2 wherein the inner wall of said leg engaged by said adjoining turn is provided with spaced depressions in said bulb acting as abutment means for said adjoining turn.
  • each of said elements is located near the bend.
  • each leg has diameter at its junction end substantially the same as along its body part.
  • each terminal wire is movable both laterally and longitudinally with respect to its axis in reaction to heat from operation of the lamp and its contact.

Landscapes

  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
US682792A 1966-11-30 1967-11-14 Tubular electric incandescent lamp with filament and current supply wires spaced from tube walls Expired - Lifetime US3535577A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6616833A NL6616833A (de) 1966-11-30 1966-11-30

Publications (1)

Publication Number Publication Date
US3535577A true US3535577A (en) 1970-10-20

Family

ID=19798344

Family Applications (1)

Application Number Title Priority Date Filing Date
US682792A Expired - Lifetime US3535577A (en) 1966-11-30 1967-11-14 Tubular electric incandescent lamp with filament and current supply wires spaced from tube walls

Country Status (5)

Country Link
US (1) US3535577A (de)
AT (1) AT269283B (de)
GB (1) GB1167769A (de)
NL (1) NL6616833A (de)
SE (1) SE319235B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3784865A (en) * 1972-02-04 1974-01-08 Gen Electric Filament support
US3918833A (en) * 1974-01-11 1975-11-11 Warren H Eilertson Circulation control rotor hub using teacup cam and pushrod valves
US4942331A (en) * 1989-05-09 1990-07-17 General Electric Company Filament alignment spud for incandescent lamps
WO2000070652A1 (en) * 1999-05-18 2000-11-23 Koninklijke Philips Electronics N.V. Electric incandescent lamp
EP1102310A1 (de) * 1999-11-19 2001-05-23 General Electric Company Fadenaufstellung für eine Glühlampe mit hineinschraubenden Endstopfen und ihr Herstellungsverfahren
US20050094989A1 (en) * 2001-06-27 2005-05-05 Halpin Michael W. Lamp filament design
US20140292187A1 (en) * 2013-03-29 2014-10-02 Toshiba Lighting & Technology Corporation Heater Lamp and Heating Module

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20020148U1 (de) 2000-09-18 2001-03-22 Advanced Photonics Technologies AG, 83052 Bruckmühl Strahlungsquelle und Bestrahlungsanordnung
DE10051904B4 (de) * 2000-09-18 2006-01-05 Advanced Photonics Technologies Ag Strahlungsquelle und Bestrahlungsanordnung
DE10051905B4 (de) * 2000-09-18 2006-07-06 Advanced Photonics Technologies Ag Strahlungsquelle und Bestrahlungsanordnung

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US263304A (en) * 1882-08-29 Manufacturing incandescent electric lamps
US1925648A (en) * 1928-09-21 1933-09-05 Hans J Spanner Lighting device
US2523033A (en) * 1949-12-16 1950-09-19 Gen Electric Electric radiant energy device
US2675497A (en) * 1951-02-27 1954-04-13 Westinghouse Electric Corp Quartz metal seal
US3039015A (en) * 1958-09-04 1962-06-12 Gen Electric Co Ltd Devices for producing light or infra-red radiation
US3080497A (en) * 1959-12-11 1963-03-05 Gen Electric Bent end incandescent lamp
GB946149A (en) * 1961-07-03 1964-01-08 Gen Electric Co Ltd Improvements in or relating to electric lamps
US3237045A (en) * 1962-03-16 1966-02-22 Gen Electric Bent end electric lamp having lead wires anchored at ends of bend and provided with expansion portion
US3250941A (en) * 1963-03-01 1966-05-10 Gen Electric Discharge lamp manufacture

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US263304A (en) * 1882-08-29 Manufacturing incandescent electric lamps
US1925648A (en) * 1928-09-21 1933-09-05 Hans J Spanner Lighting device
US2523033A (en) * 1949-12-16 1950-09-19 Gen Electric Electric radiant energy device
US2675497A (en) * 1951-02-27 1954-04-13 Westinghouse Electric Corp Quartz metal seal
US3039015A (en) * 1958-09-04 1962-06-12 Gen Electric Co Ltd Devices for producing light or infra-red radiation
US3080497A (en) * 1959-12-11 1963-03-05 Gen Electric Bent end incandescent lamp
GB946149A (en) * 1961-07-03 1964-01-08 Gen Electric Co Ltd Improvements in or relating to electric lamps
US3237045A (en) * 1962-03-16 1966-02-22 Gen Electric Bent end electric lamp having lead wires anchored at ends of bend and provided with expansion portion
US3250941A (en) * 1963-03-01 1966-05-10 Gen Electric Discharge lamp manufacture

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3784865A (en) * 1972-02-04 1974-01-08 Gen Electric Filament support
US3918833A (en) * 1974-01-11 1975-11-11 Warren H Eilertson Circulation control rotor hub using teacup cam and pushrod valves
US4942331A (en) * 1989-05-09 1990-07-17 General Electric Company Filament alignment spud for incandescent lamps
WO2000070652A1 (en) * 1999-05-18 2000-11-23 Koninklijke Philips Electronics N.V. Electric incandescent lamp
EP1102310A1 (de) * 1999-11-19 2001-05-23 General Electric Company Fadenaufstellung für eine Glühlampe mit hineinschraubenden Endstopfen und ihr Herstellungsverfahren
US20050094989A1 (en) * 2001-06-27 2005-05-05 Halpin Michael W. Lamp filament design
US6980734B2 (en) * 2001-06-27 2005-12-27 Asm America, Inc. Lamp filament design
US20140292187A1 (en) * 2013-03-29 2014-10-02 Toshiba Lighting & Technology Corporation Heater Lamp and Heating Module

Also Published As

Publication number Publication date
NL6616833A (de) 1968-05-31
GB1167769A (en) 1969-10-22
DE1589271B2 (de) 1975-10-09
SE319235B (de) 1970-01-12
DE1589271A1 (de) 1970-03-26
AT269283B (de) 1969-03-10

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