US2912610A - Electrical incandescent lamp mounting structure - Google Patents

Electrical incandescent lamp mounting structure Download PDF

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Publication number
US2912610A
US2912610A US523149A US52314955A US2912610A US 2912610 A US2912610 A US 2912610A US 523149 A US523149 A US 523149A US 52314955 A US52314955 A US 52314955A US 2912610 A US2912610 A US 2912610A
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US
United States
Prior art keywords
filament
loop
main
lamp
screen
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
US523149A
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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
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US Philips Corp
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Filing date
Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US2912610A publication Critical patent/US2912610A/en
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K9/00—Lamps having two or more incandescent bodies separately heated
    • H01K9/08—Lamps having two or more incandescent bodies separately heated to provide selectively different light effects, e.g. for automobile headlamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/02—Incandescent bodies
    • H01K1/14—Incandescent bodies characterised by the shape

Definitions

  • An incandescent lamp for car lights which comprises a helically wound main filament that is stretched to form an arc in a manner such that its closed part faces a screen provided in the lamp, which screen partly surrounds an auxiliary filament.
  • These lamps are intended for use in conjunction with a reflector.
  • These reflectors are usually separated from the lamp itself; however, constructions are known, in which the lamp bulb on the rear side has such a shape, usually corresponding to parabola, that this rear side itself subsequent to silverplating, may serve as a reflector.
  • attempts are made to arrange the top of the arc of the main filament and the rear side of the auxiliary filament cooperating with the screen as far as possible in the proximity ofthe focal spotof the reflector.
  • the top of the arc of the filament is positioned at a very short distance from the rear side of the said screen.
  • tion of the lamp and, more particularly, to prevent the main filament from sagging, which might affect adversely the light distribution in the beam to be radiated it would be desirable to provide an'additional support for the top of the main filament, the ends of which are secured to two pole wires. This is required particularly if such a filament has large dimensions and is, consequently, comparatively heavy. It is found, however, that, owing to the small space available in the proximity "of the rear side of the screen, the support forthe top'ofthe'main filament can be realized only with'difiiculty.
  • the filament may be V- shaped or U-shaped.
  • the main filament may, .for example, have a straight wire section bent out to form a loop.
  • the present invention is particularly important for those cases in which the main filament for some reason or other has large dimensions,. thus being comparatively heavy. This appliesfor example to the case in which the operational voltages'ffor' the filaments in the lamp is 12 v. or more.
  • Figs. l and 2 show perspectively embodiments 'of 'a lamp mount fori'usein 'a car lamp, 'in which the main filament isadditionally supported by means of a loop.v
  • Figs. 1A is a partial side elevation view of Fig. v1 disclosing the pole wire, .main filament and supporting porting structure would be used behind the rear side of the 1 screen, this would'have the disadvantage that the filament which is stretched would be capable of shifting in place transversely to the main axis of the lamp relatively to the supporting structure. Such a displacement affects quite adversely the light distribution of the luminous rays omitted by this main filament.
  • the lamp of the aforesaid kind has the feature that the part of the main filament near the screen is shaped in the form of a loop bent out of the plane of the main filament and preferably supported at its top. It is thus possible to provide an additional support for the main filament, the loop being so arranged that the supporting area of the main filament is such that it has suflicient space left for that part of the supporting member.
  • This supporting member may be arranged in different ways in the lamp; it may, for example, be secured by way of a filament, for example, a glass bead to one of the other pole wires.
  • the top of the main filament is supported by a stay wire sealed in the pinching of the lamp.
  • Figs. 3 and4 show on an enlarged scale in a perspective view two embodiments of main'filameritsof alamp according to the invention.
  • Fig. 5 shows a front view'of a possible embodiment in which a filament, wound without intermediate piece,jis provided with a loop.
  • reference numeral 1 designates the pinching 'or base member of thelam'p.
  • reference numeral 1 designates the pinching 'or base member of thelam'p.
  • the main filamentS is stretched. It is evident-from the figure that the pole wire 3 is longer than the pole wire 2.
  • the end 7 of this auxiliary filament is secured to the screen 6; and the other end 7 of the filament 7 is secured to the part 4 of the pole wire 4 curved over the head surface 8 of the screen 6, so that this pole Wire extends below the screen 6.
  • an insulating connection comprising the metal wire pieces 10 and 11 and the glass bead 12, operating as an insulator.
  • both the part of the filament 5 nearest the screen 6 and the part of the auxiliary filament 7 nearest the rear side 13 of the screen are as close to one another as possible.
  • these parts may be arranged at the smallest possible distance from the focal spot F of the parabolic reflector (not shown), in which this lamp is housed.
  • the main filament 5 is likely to sag after some time, if no special precautions are taken.
  • This phenomenon is, of course, most conspicuous in the proximity of F, i.e. the area farthest away from the connecting areas 5 and 5 of the filament 5 to the pole wires 2 and 3.
  • the present invention overcomes this disadvantage by providing that part of the main filament 5, which lies in the immediate proximity of the screen 6, with a loop 14, which is bent g 3 V out of the plane of the" main filament 5. At the area of the top 14 of this loop this" top is surrounded by an eye let 15, which is supported by the pole wire 4 by way of the glass bead 16 and the wire piece 17. It is thus ensured that the filament maintains its original position and shape in a considerably more satisfactory manner than would be the case if this measure were not taken.
  • the loop ensures particularly that the filament cannot shift in place transversely to the direction of length of the lamp.
  • the lamp pinching 25 comprises three pole wires 26, 27, and 28 and an additional wire 29.
  • the latter wire is not connected to any of the external lamp contacts.
  • the prolongation of the pole wire 27 supports the screen 30, which partly surrounds the' auxiliary filament 31; the end 31 of this filament is connected electrically conductively to the screen 30.
  • the end 31 of the filament is secured to the end 28 of the pole wire 28, which, as is evident from the figure, extends partly below the screen 30 and partly around the side of this screen and the end of which lies, in this embodiment, behind the head surface 32 of the screen 30.
  • the main filament 33, the ends 33 and 33 of which are secured to the pole wires 26 and 27, comprises the loop 34, bent out of the plane of this body, this loop being secured to the stay wire 29. This support thus provides that, even in the operational conditions of the lamp, the filament maintains its prescribed position as far as possible.
  • Fig. 3 shows the main filament on an enlarged scale; from this figure it is evident that because of the helically wound parts 40 and 41 of this filament provision is made of a non-helically wound portion 42. If the parts 40 and 41 were each twice wound helically, it would suffice for the portion 42 to have a single helical turn or it would suffice to provide a part which is not wound helically at all, so that it is constituted by an initially straight wire piece.
  • the filament shown in Fig. 3, of which the parts 40 and 41 exhibit the same direction of winding, may be manufactured by means of a coiling machine, the controlmechanism of which is adjusted in a manner such that alternately helically wound portions (40 and 41) and straight intermediate pieces are formed. These straight intermediate pieces may alternatively serve to form the loop 42 and to operate as the ends 43 and 44, which are to be secured to the pole wires.
  • the incandescent wire portions 45 and 46 which are separated by the loop 47, exhibit opposite directions of winding. This embodiment improves the rigidity of the filament to a high extent.
  • Fig. 5 shows, how an uninterruptedly singleor multiple-wound filament 48 maybe provided with a loop in a simple manner. While the filament is supported from the table of which the portions 49 and 49 are separated by a slot 50 this filament may-be subjected to the force exerted by a pressure member 51, which is located just over the slot 50 in the table. When this pressure member is lowered the turns over this slot will in accordance with the width of this slot, be urged down through this slot by the pressure member 51, the helical windings being thus caused to open themselves. Thus, a filament is obtained of which the helically wound portions 52 and52 are separated by a loop 53.
  • An incandescent lamp mount and electrical arrangement for an automobile headlight comprising; a base member, a helically wound main filament having opposite ends thereof mounted on said member, a stretched intermediate portion of said main filament extending in the shape of a loop, said loop extending transversely relative to the remainder of said main filament, a supporting means for said loop, an auxiliary filament attached to said base member and disposed adjacent said intermediate portion of the main filament, a screen partially surrounding said auxiliary filament and mounted on said base member, the point of attachment of said supporting means to said loop being in a lower plane than the plane of said auxiliary filament whereby said main and auxiliary filaments are located as close to the focal point of said automobile headlight as possible while preventing shadows in the light pattern projected by said automobile headlight.

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  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
US523149A 1954-07-24 1955-07-20 Electrical incandescent lamp mounting structure Expired - Lifetime US2912610A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL334458X 1954-07-24

Publications (1)

Publication Number Publication Date
US2912610A true US2912610A (en) 1959-11-10

Family

ID=19784493

Family Applications (1)

Application Number Title Priority Date Filing Date
US523149A Expired - Lifetime US2912610A (en) 1954-07-24 1955-07-20 Electrical incandescent lamp mounting structure

Country Status (7)

Country Link
US (1) US2912610A (en, 2012)
BE (1) BE540045A (en, 2012)
CH (1) CH334458A (en, 2012)
DE (1) DE1061901B (en, 2012)
FR (1) FR1127860A (en, 2012)
GB (1) GB817326A (en, 2012)
NL (2) NL89171C (en, 2012)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3025424A (en) * 1958-06-16 1962-03-13 Gen Electric Electric lamp
US3107866A (en) * 1961-01-25 1963-10-22 Nowak Karl Motor vehicle headlamp
US3165659A (en) * 1962-03-08 1965-01-12 Westinghouse Electric Corp Rectangular beam electric incandescent lamp
US3979622A (en) * 1973-05-01 1976-09-07 U.S. Philips Corporation Headlight and incandescent lamp for anti-dazzle beam
WO2014180806A1 (en) * 2013-05-07 2014-11-13 Koninklijke Philips N.V. Automotive front lighting lamp with baffle
CN111063605A (zh) * 2020-01-06 2020-04-24 海宁市新宇光能科技有限公司 灯丝灯导丝自动套管器

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1716048A (en) * 1921-07-29 1929-06-04 Safety Anti Dazzle Bulb Syndic Vehicle lamp
US1793398A (en) * 1928-01-11 1931-02-17 Hamberger John Electric lamp
US1947243A (en) * 1932-07-28 1934-02-13 Gen Electric Electric lamp
US2020130A (en) * 1931-05-04 1935-11-05 Gen Electric Vehicle headlight lamp
US2404992A (en) * 1946-07-30 Lamp filament connection
US2605436A (en) * 1950-07-01 1952-07-29 Gen Electric Electric incandescent lamp
US2617062A (en) * 1949-04-13 1952-11-04 Hartford Nat Bank & Trust Co Electric incandescent lamp

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR544689A (fr) * 1921-12-19 1922-09-26 Besnard Ets Perfectionnements aux lampes électriques pour phares d'automobiles
DE499214C (de) * 1922-07-15 1930-06-04 Arnold Graves Elektrische Gluehlampe mit zwei wahlweise benutzbaren Leuchtkoerpern
BE373635A (en, 2012) * 1929-09-23
US2597681A (en) * 1950-07-01 1952-05-20 Gen Electric Electric incandescent lamp

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2404992A (en) * 1946-07-30 Lamp filament connection
US1716048A (en) * 1921-07-29 1929-06-04 Safety Anti Dazzle Bulb Syndic Vehicle lamp
US1793398A (en) * 1928-01-11 1931-02-17 Hamberger John Electric lamp
US2020130A (en) * 1931-05-04 1935-11-05 Gen Electric Vehicle headlight lamp
US1947243A (en) * 1932-07-28 1934-02-13 Gen Electric Electric lamp
US2617062A (en) * 1949-04-13 1952-11-04 Hartford Nat Bank & Trust Co Electric incandescent lamp
US2605436A (en) * 1950-07-01 1952-07-29 Gen Electric Electric incandescent lamp

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3025424A (en) * 1958-06-16 1962-03-13 Gen Electric Electric lamp
US3107866A (en) * 1961-01-25 1963-10-22 Nowak Karl Motor vehicle headlamp
US3165659A (en) * 1962-03-08 1965-01-12 Westinghouse Electric Corp Rectangular beam electric incandescent lamp
US3979622A (en) * 1973-05-01 1976-09-07 U.S. Philips Corporation Headlight and incandescent lamp for anti-dazzle beam
WO2014180806A1 (en) * 2013-05-07 2014-11-13 Koninklijke Philips N.V. Automotive front lighting lamp with baffle
US20160086789A1 (en) * 2013-05-07 2016-03-24 Koninklijke Philips N.V. Automotive front lighting lamp with baffle
US9613793B2 (en) * 2013-05-07 2017-04-04 Koninklijke Philips N.V. Automotive front lighting lamp with baffle
CN105164786B (zh) * 2013-05-07 2017-07-25 皇家飞利浦有限公司 带有隔板的汽车前照明灯
CN111063605A (zh) * 2020-01-06 2020-04-24 海宁市新宇光能科技有限公司 灯丝灯导丝自动套管器

Also Published As

Publication number Publication date
CH334458A (de) 1958-11-30
DE1061901B (de) 1959-07-23
NL89171C (en, 2012)
NL189456B (nl)
GB817326A (en) 1959-07-29
BE540045A (en, 2012)
FR1127860A (fr) 1956-12-26

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