US2644102A - Incandescent lamp mount and manufacture thereof - Google Patents

Incandescent lamp mount and manufacture thereof Download PDF

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Publication number
US2644102A
US2644102A US178697A US17869750A US2644102A US 2644102 A US2644102 A US 2644102A US 178697 A US178697 A US 178697A US 17869750 A US17869750 A US 17869750A US 2644102 A US2644102 A US 2644102A
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US
United States
Prior art keywords
conductors
filament
envelope
points
bridge
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
US178697A
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English (en)
Inventor
Melvin L Stone
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority to US178697A priority Critical patent/US2644102A/en
Priority to ES0198406A priority patent/ES198406A1/es
Priority to FR1040103D priority patent/FR1040103A/fr
Priority to GB18779/51A priority patent/GB718712A/en
Application granted granted Critical
Publication of US2644102A publication Critical patent/US2644102A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/18—Mountings or supports for the incandescent body

Definitions

  • lamps customarily comprise a sealed envelope or bulb into the neck end of which is sealed a mount structure comprising a supporting framework within which the lamp filament is supported, the supporting framework consisting of a pair of rigid lead-in conductors or side rods to which the filament is connected at its ends, and a pair of insulative support bridges fastened to the side conductors in positions respectively above and below the filament and carrying support hooks which engage and additionally support the filament at intermediate points thereof.
  • the upper and lower support bridges for the filament of such lamps are fastened to the side conductors at points thereon spaced relatively far apart and respectively above and below the filament.
  • the bridge supports caused by the expansion and contraction, during lamp operation, of those portions of the lead-in conductors intervening between the respective pointsv of support of the bridges thereon, it has been common practice to either employ lead-in conductors hav- 6 Claims. (Cl.
  • the preferred practice is to first hold the filament and the upper bridge in assembled relation with the side conductors of the mount in a special jig designed for such purpose and to then spot-weld the upper bridge and the filament unit in place onthe conductors while thus jig-held in proper relation, after which the so-formed partially completed.
  • mount structure is next assembled in proper relation with the lower bridge in another jig designed for such purpose'and the lower bridge provide a lamp mount structure of the abovedescribed general type which is of simplified and less expensive construction and which is comparatively easy and cheaper to fabricate.
  • Another object of my invention is to provide an improved method of making a mount structure of the above-described general type.
  • the lower bridge is fastened, by extended support members, to the side conductors at points closely adjacent the points ofsupport or connection thereto of the upper bridge and the filament ends, and the side conductors are each made of one continuous length of wire of the same material' throughout, which conductors may be formed to shape by automatically operating reshaping means. All the component parts of the mount, comprising the filament, the upper and lower bridges, and the two side lead-in conductors, are then assembled'and fastened together in one single assembly operation.
  • Fig. 1 is an elevation partly in section of an electric incandescent lamp provided with a mount structure according tothe invenmolybdenum or tungsten tion
  • Fig. 2 is an enlargedfragmentary perspective view of the mount structure shown in Fig. 1.
  • the electric incandescent lamp there illustrated, and to which the invention is particularly adapted, is of the high-wattage concentrated filament typecomprising a sealed tubular glass envelope or bulb I into the neck end of which is sealed a, mount 2 according to the invention.
  • the mount 2 comprises a glass stem 3 which extends into the envelope I and is provided with a pressed seal portion 4 through which are sealed a pair of lead-in conductors 5, 5.
  • the outer ends of the said conductors 5, 5 are connected to the shell contact 6 and end eyelet contact 1 of a conventional type lamp base 8 cemented or otherwise suitably secured to the stem end of the envelope tions l3, l3 and fastened thereacross.
  • the filaments segments I! may be disposed in any desired relation with respect to each other. For example, they may be disposed all in substantially one plane to form a so-called monoplane filament or, as shown, they may be staggered so as to lie alternately in substantially two parallel planes to'form a biplane filament. As'shown, the filament I6 is mounted on the conductors 5, 5 with its plane lying substantially in the plane of the said conductors.
  • the filament I6 is supported in place on a 53, I3'of the conductors 5, 5 and upper and lower insulative support members or bridges 26 and 2
  • the ends of the filament 16 are supported and electrically 'connected to the inner lead portions l3, it by I.
  • the reentrant stem 3 is further provided with J an exhaust tube 9 which communicates with the interior of the envelope through an opening it in the stem and through which the envelope is exhausted and, if desired, filled with ajsuitable gas such as nitrogen, for instance. After such exhaustion and gas filling of the envelope, the exhaust tube 9 is sealed or tipped-off in the conventional manner to thereby hermetically seal the envelope. 7
  • the lead-in conductors .5, 5 are formed with relatively rigid seal portions H, II which are sealed through the stem press 4 and are made of a material which more or less matches the expansion coefiicient of the glass of the stem 3, forexample, tungsten where a hard glass stem is used.
  • -Theinner ends of the seal or-press portions H of the conductors-5 are butt-welded, as indicated at 12, to the ends of inner lead portions 1 3, 13 which are also of relatively heavy and rigid character and which, in accordance with the invention, are each made of a single piece of any suitable ordinary metal, such as nickel or nickeliron alloy for instance, which is relatively inexpensive.
  • the inner leads 13 are made of 50 mil diameter wire of a nickel-iron alloy containing approximately 52% nickel and 48% iron.
  • the inner lead portions !3, 13 Adjacent their lower or outermost ends, the inner lead portions !3, 13 are bent or offset outward away from each other as indicated at M, and at their upper or innermost ends they are bent inwardly toward each other to form inturned opposed inner end portions l5, [5.
  • the use of lead-in conductors 5, 5 as describedabove, having inner lead portions !3 which are formed in one piece of ordinary and relatively inexpensive material therefore materially lowers the cost ofthe lead-in conductors as compared to the multi-section lead-in conductors heretofore in use having molybdenum insert sections in their inner lead portions.
  • such one-piece inner leadconductors lend themselves to fully automatic forming and bending thereof to shape, which also reduces the cost of the completed conductor.
  • connector wires or spuds 22, 22, of molybdenum or other suitable material, which are spot-welded at one end, to the inturned inner ends l5, 15 .of theinner leads 13,13 and are connected at their other ends to the filament ends by a ,joint or.
  • the spud wire 22 being provided with a helical screw thread and being screwed into and completely through a short helically coiled filament end leg 23 which is'connected to the adjacent coiled outer segment ll of the filament by an uncoiled section or bight 2d.
  • the filament l6 is additionally supported at a the bights l8, it thereof by the upper and lower support members or bridges 2G and 2 l.
  • the upper bridge 26 comprises an insulative cross bar 25 such as a short length of glass rod or other vitreous material carrying a plurality of wire hooks26 of suitable material, such as tungsten or molybdenum, the hook ends of which engage the upper bights, E8 of the filament and the other ends of which are fused into the sides of the cross bar 25.
  • the upper cross bar 25 is supported by wires 21 fused into its lower side near its ends and welded to the inbent inner ends l5, l5 of the inner leads l3, l3 inwardly adjacent the welded connections of the spud wires 22, 22 thereto.
  • likewise comprises an insulative cross bar 28 similar to the upper cross bar and carrying a plurality of similarwire hooks 29, the hook ends of which engage the lower bights l9 vof the filament and the other ends of which are fused into thesides of the cross bar 28.
  • the lower cross bar 28 instead of being supported in place -by support wires fastened to the offset side portions 30, 30 of the inner leads [3,13 in'the manner heretofore customary in the art, is supportedin place by extended support members or wires 3
  • are preferably in the form of molybdenum wire of a suitahle diameter '(25 mil diameter in the particular lamp showmland are fused into the upper.
  • additional side supports 32 may be provided for the lower bridge 21 to preve'ntor limit swinging movement thereof laterally of the plane of its main supports 3i.
  • additional supports 32 may be in the form of wire hooks, of nickel or other suitable material, spot welded to the inner leads 3E; and having hooked ends 33 hooked around the main bridge support wires 3
  • An electric lamp comprising a sealed envelope, a pair of rigid lead-in conductors sealed into said envelope and extenl ing thereinto in spaced side-by-side relation, a filament mounted said envelope between and connected at its ends to said conductors, and a pair of insulative support members located respectively above and below said filament and supporting it intermediate the ends thereof, said support members being fastened across said conductors with their points of attachment to respective conductors located closely adjacent each other.
  • An electric lamp comprising a sealed envelope, a pair of rigid lead-in conductors sealed into said envelope and extending thereinto in spaced side-by-side relation, a filament mounted in said envelope between and connected at its ends to said conductors, and a pair of insulative support members comprising upper and lower'bridges located respectively above and below said filament and supporting it intermediate the, ends thereof, the upper bridge being fastened across and attached to said conductors at points thereon superjacent to said filament and'the lower bridge being fastened across said conductors and sup-- ported therefrom by extended refractory metal supports attachedtosaid conductors at points closely adjacent the said points of attachment thereto of the upper bridge.
  • An electric lamp comprising a sealed envelope, a pair of rigid lead-in conductors sealed into said envelope and extending thereinto in spaced side-by-side relation, a filament mounted.
  • An electric lamp comprising a sealed envelope, a pair of rigid lead-in conductors having press lead portions sealed through the wall of said envelope and one-piece inner lead portions extending into said envelope in spaced side-byside relation, a filament mounted in said envelope between and connected at its ends to said conductors by support spuds welded to the conductors at points superjacent to the filament, an upper support bridge located above and supporting said filament intermediate its ends and welded to said conductors at points closely adjacent the welded connections thereto of said spuds, and a lower support bridge located be-- low and also supporting said filament intermediate its ends, said lower bridge being fastened across and supported from said conductors by extended highly refractory metalsupports extending upwardly from the lower bridge alongextending into said envelope in spaced side-by side relation and terminating in inturned inner end portions, a filament mounted in said envelope between the inner-lead portions of said conductors and connected at its ends to the 7 said inturned inner end portions of said'conductors, and a pair of

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  • Vessels And Coating Films For Discharge Lamps (AREA)
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US178697A 1950-08-10 1950-08-10 Incandescent lamp mount and manufacture thereof Expired - Lifetime US2644102A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US178697A US2644102A (en) 1950-08-10 1950-08-10 Incandescent lamp mount and manufacture thereof
ES0198406A ES198406A1 (es) 1950-08-10 1951-06-19 UNA LáMPARA ELÉCTRICA INCANDESCENTE DEL TIPO DE FILAMENTO CONCENTRADO
FR1040103D FR1040103A (fr) 1950-08-10 1951-07-25 Monture de lampe à incandescence et sa fabrication
GB18779/51A GB718712A (en) 1950-08-10 1951-08-09 Improvements in and relating to electric incandescent lamp mounts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US178697A US2644102A (en) 1950-08-10 1950-08-10 Incandescent lamp mount and manufacture thereof

Publications (1)

Publication Number Publication Date
US2644102A true US2644102A (en) 1953-06-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
US178697A Expired - Lifetime US2644102A (en) 1950-08-10 1950-08-10 Incandescent lamp mount and manufacture thereof

Country Status (4)

Country Link
US (1) US2644102A (es)
ES (1) ES198406A1 (es)
FR (1) FR1040103A (es)
GB (1) GB718712A (es)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2721291A (en) * 1953-02-27 1955-10-18 Westinghouse Electric Corp Incandescent electric lamp
US3909653A (en) * 1969-05-02 1975-09-30 Westinghouse Electric Corp Compact electric incandescent lamp having planar filament and improved mount

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1726480A (en) * 1926-07-10 1929-08-27 Gen Electric Method of and apparatus for making concentrated filaments
US1967852A (en) * 1933-12-08 1934-07-24 Gen Electric Electric lamp
US2434478A (en) * 1943-12-22 1948-01-13 Westinghouse Electric Corp Incandescent electric lamp and method
US2449679A (en) * 1944-11-30 1948-09-21 Gen Electric Lamp filament support and connection
US2473919A (en) * 1947-08-14 1949-06-21 Gen Electric Method and apparatus for assembling incandescent lamp mounts

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1726480A (en) * 1926-07-10 1929-08-27 Gen Electric Method of and apparatus for making concentrated filaments
US1967852A (en) * 1933-12-08 1934-07-24 Gen Electric Electric lamp
US2434478A (en) * 1943-12-22 1948-01-13 Westinghouse Electric Corp Incandescent electric lamp and method
US2449679A (en) * 1944-11-30 1948-09-21 Gen Electric Lamp filament support and connection
US2473919A (en) * 1947-08-14 1949-06-21 Gen Electric Method and apparatus for assembling incandescent lamp mounts

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2721291A (en) * 1953-02-27 1955-10-18 Westinghouse Electric Corp Incandescent electric lamp
US3909653A (en) * 1969-05-02 1975-09-30 Westinghouse Electric Corp Compact electric incandescent lamp having planar filament and improved mount

Also Published As

Publication number Publication date
ES198406A1 (es) 1951-08-16
GB718712A (en) 1954-11-17
FR1040103A (fr) 1953-10-13

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