US3736452A - Halogen motorcar lamp - Google Patents

Halogen motorcar lamp Download PDF

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Publication number
US3736452A
US3736452A US00183548A US3736452DA US3736452A US 3736452 A US3736452 A US 3736452A US 00183548 A US00183548 A US 00183548A US 3736452D A US3736452D A US 3736452DA US 3736452 A US3736452 A US 3736452A
Authority
US
United States
Prior art keywords
envelope
filament
lamp
cone
dazzle
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
US00183548A
Other languages
English (en)
Inventor
J Rijnders
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 US3736452A publication Critical patent/US3736452A/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
    • H01K1/28—Envelopes; Vessels
    • 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

Definitions

  • ABSTRACT 0 i A halogen filament lamp having two filaments for mo- Foreign pp Data torcar headlights.
  • the envelope comprises two cylindrical end portions and a rotationally symmetric Sept. 30, 1970 Netherlands ..70l4336 widened intermediate part.
  • y Suitable choice of the location of the transition between the cylindrical top 52 us. (:1. ..313/115 313 272 313/316 envempe and widened Part relative
  • Int Cl 1/26 to the location between the end faces of the two fila- Fie'ld 314 315 ments facing each other it is achieved thatparasitic light sources emanating from the anti-dazzle filament which would supply a dazzling beam do not occur.
  • the invention relates to a halogen filament lamp comprising a tubular lamp envelope in which a filament for driving light and a filament for anti-dazzlelight are stretched axially, the filament for anti-dazzle light being surrounded over part of its circumference by a reflecting screen.
  • a halogen filament lamp is known as a twin lamp for vehicle head lights.
  • the wall of the tubular lamp envelope reflects the lamp rays originating from the filament for anti-dazzle light, as a result of which an elongate reproduction of said filament is formed inside the lamp envelope which operates as a parasitic light source.
  • said lamp is arranged in the usual manner in a parabolic reflector, the focus of said reflector is found to lie just in said reproduction.
  • the antidazzle light is switched on, a dazzling main. beam caused by said parasitic light source will be radiated in addition to an anti-dazzle light beam.
  • the lamp according to the invention is characterized in that the envelope comprises a smoothly curved, widened, preferably rotationally symmetric part present between two cylindrical end portions, the plane passing through the transition zone between the widened part and one of the cylindrical end portions intersecting the anti-dazzle filament approximately centrally between its ends, the apical angle of the cone which has the center between the end faces of the two filaments facing each other as apex and the said transition zone as base being between 80and 100.
  • the tubular envelope comprises a curved thickened part, the rays originating from the anti-dazzle filament and reflected by the wall of the envelope are very strongly scattered at the area of the said circular transition zone and only few of these rays will pass the focus of the reflector. Since the rays reflected by the cylindrical end portion and the thickened part which adjoin on either side of said circular zones do not pass through the focal zone either, said lamp will show the abovementioned drawbacks to a far smaller extend.
  • the widened part of the wall of the envelope present immediately behind the said zone cannot contribute to such reflections of anti-dazzle rays that they pass the focal zone. It is recommendable, however, to take also such measures that anti-dazzle light rays which are reflected by the widened part of the envelope adjoining the second annular zone near the other end of the tube do not pass through the said focal zone either. This can be achieved by giving said widened part of the envelope an adapted shape. From a point of view of manufacture this is not very attractive.
  • an embodiment is preferably used which is characterized in that the conical surface of the cone, viewed from the anti-dazzle filament in the direction of the driving light filament, intersects the envelope according to a circle present transversely to the axis of the envelope, the part of the envelope further remote from the filaments comprising over a part of its circumference a layer which prevents the passage of light, one of the contours of said layer being formed by a part of the circle.
  • substantially no dazzle phenomenon will occur when the antidazzle light is switched on.
  • the drawing shows a twin lamp'l for a motorcar headlight arranged in a parabolic reflector 3 and that only those parts thereof which are necessary for the description of the invention.
  • the lamp 1 comprises a lamp envelope 7 sealed at one end by a pinch seal 5 and in which a halogencontaining atmosphere prevails.
  • the lamp envelope comprises two cylindrical portions 9 and 11 and an intermediate smoothly curved widened part 13.
  • Arranged in the envelope in a manner normal for twinlamps are a filament 15 for driving light and a filament 17 for anti-dazzle light.
  • a screen 18 surrounds the antidazzle filament 17 over the downward part thereof. This screen intersects the downwardly directed antidazzle rays which normally impinge upon the lower half of the reflector and give rise to a dazzling beam.
  • the focus of the reflector is denoted by F.
  • the transitions between the widened part 13 and the two cylindrical portions 9 and 11 are formed as annular narrow zones which are denoted by 19 and 21 in the drawing.
  • the zone 19 intersects the anti-dazzle filament 17 just in the center of its length.
  • the rays emerging from the anti-dazzle filament l7 and impinging upon the wall of the envelope are partly reflected and, in so far as they impinge upon the wall of the portion 9, cannot reach the reflector 3 after reflection.
  • the reflected outermost ray 23 will just be intercepted by the screen 18.
  • the presence of the black layer 35 hardly impedes the radiation of the filament for driving light when the line denoted by 37 encloses an angle a of 40-50 with the axis of the lamp.
  • a halogen filament lamp comprising:
  • a lamp envelope having cylindrical end portions, said envelope having an outwardly bulging intermediate portion between the cylindrical end portions, said bulging intermediate portion being smoothly curved and symmetric about the longitudinal axis of the lamp; a filament for a driving light stretched axially in the envelope;

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
US00183548A 1970-09-30 1971-09-24 Halogen motorcar lamp Expired - Lifetime US3736452A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7014336A NL7014336A (ja) 1970-09-30 1970-09-30

Publications (1)

Publication Number Publication Date
US3736452A true US3736452A (en) 1973-05-29

Family

ID=19811187

Family Applications (1)

Application Number Title Priority Date Filing Date
US00183548A Expired - Lifetime US3736452A (en) 1970-09-30 1971-09-24 Halogen motorcar lamp

Country Status (11)

Country Link
US (1) US3736452A (ja)
JP (1) JPS5241587B1 (ja)
AT (1) AT306857B (ja)
BE (1) BE773207A (ja)
CA (1) CA937976A (ja)
DE (1) DE2145128C3 (ja)
FR (1) FR2108724A5 (ja)
GB (1) GB1336463A (ja)
IT (1) IT938845B (ja)
NL (1) NL7014336A (ja)
SE (1) SE363928B (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968395A (en) * 1972-09-25 1976-07-06 Siemens Aktiengesellschaft Two filament electric bulb traffic light
US4302698A (en) * 1978-09-22 1981-11-24 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen M.B.H. Dual-filament halogen incandescent lamp, particularly sealed-beam, automotive headlight
WO1998049716A1 (en) * 1997-04-28 1998-11-05 Osram Sylvania Inc. Vehicle lamps with glare control
US6281630B1 (en) 1997-04-28 2001-08-28 Osram Sylvania, Inc. Vehicle lamps with glare control

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62147480U (ja) * 1986-03-13 1987-09-17
JP7125557B2 (ja) 2019-06-20 2022-08-24 アルプスアルパイン株式会社 操作装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3200281A (en) * 1961-10-09 1965-08-10 Mickley Rolf Two-filament incandescent lamp for non-dazzling high and low beams in automobile headlights
US3646386A (en) * 1968-06-08 1972-02-29 Philips Corp Halogen filament lamp for vehicle headlight with screen partially surrounding antiglare filament
US3646385A (en) * 1969-01-10 1972-02-29 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Motor vehicle headlight and double-filament incandescent lamp therefor with glare light shield

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3200281A (en) * 1961-10-09 1965-08-10 Mickley Rolf Two-filament incandescent lamp for non-dazzling high and low beams in automobile headlights
US3646386A (en) * 1968-06-08 1972-02-29 Philips Corp Halogen filament lamp for vehicle headlight with screen partially surrounding antiglare filament
US3646385A (en) * 1969-01-10 1972-02-29 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Motor vehicle headlight and double-filament incandescent lamp therefor with glare light shield

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968395A (en) * 1972-09-25 1976-07-06 Siemens Aktiengesellschaft Two filament electric bulb traffic light
US4302698A (en) * 1978-09-22 1981-11-24 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen M.B.H. Dual-filament halogen incandescent lamp, particularly sealed-beam, automotive headlight
WO1998049716A1 (en) * 1997-04-28 1998-11-05 Osram Sylvania Inc. Vehicle lamps with glare control
US6271622B1 (en) 1997-04-28 2001-08-07 Osram Sylvania Inc. Vehicle lamps with improved filament and filament support configurations
US6281630B1 (en) 1997-04-28 2001-08-28 Osram Sylvania, Inc. Vehicle lamps with glare control

Also Published As

Publication number Publication date
SE363928B (ja) 1974-02-04
GB1336463A (en) 1973-11-07
DE2145128A1 (de) 1972-04-06
FR2108724A5 (ja) 1972-05-19
CA937976A (en) 1973-12-04
IT938845B (it) 1973-02-10
AT306857B (de) 1973-04-25
DE2145128B2 (de) 1978-05-18
BE773207A (fr) 1972-03-28
NL7014336A (ja) 1972-04-05
DE2145128C3 (de) 1979-01-18
JPS5241587B1 (ja) 1977-10-19

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