US3553519A - High intensity vehicle lamp with shield preventing unwanted reflection - Google Patents

High intensity vehicle lamp with shield preventing unwanted reflection Download PDF

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Publication number
US3553519A
US3553519A US750165A US3553519DA US3553519A US 3553519 A US3553519 A US 3553519A US 750165 A US750165 A US 750165A US 3553519D A US3553519D A US 3553519DA US 3553519 A US3553519 A US 3553519A
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US
United States
Prior art keywords
reflector
bulb
envelope
lamp
light
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
US750165A
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English (en)
Inventor
Harris Vernon Hicks
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.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
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 Lucas Industries Ltd filed Critical Lucas Industries Ltd
Application granted granted Critical
Publication of US3553519A publication Critical patent/US3553519A/en
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Classifications

    • 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
    • H01K1/28—Envelopes; Vessels
    • H01K1/34—Double wall vessels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Definitions

  • ABSTRACT A lamp, for a road vehicle, of the kind including [54] SHIELD a reflector supporting a quartz iodine or equivalent high inten- 2 claims 5 Drum as sity bulb, and having a first light shield positioned with respect a to the bulb so as to prevent light issuing from the lamp without [52] U.S. Cl.
  • 313/113 first being reflected from the reflector, further includes a 240/4135, 240/4l.4, 313/117 second light shield.
  • the second light shield is positioned with [51 Int. Cl. F2lv 7/00, respect to the bulb so as to prevent those light rays which have H0 1 j 5/02 been refracted by the deformed portion of the envelope of the [50] Field of Search 240/4l.3 5D bulb, at the base of the bulb, and which would be reflected by 46.19, 46.49, 46.53, 46.55, 41.25; the reflector so as to issue from the lamp upwardly relative to 313/1 13-1 17 the axis of the reflector in use, from striking the reflector.
  • This invention relates to lamps, for. road vehicles, of the kind including a reflector, a quartz iodine or equivalent high intensity bulb carried by the reflector, and a first light shield positioned with respect to the bulb so as to prevent light issuing from the lamp without first being reflectedby the reflec- 101.
  • a lamp of the kind specified further includes a second light shield positioned with respect to the bulb so as to prevent those light rays which have been refracted by the deformed portion of the envelope of the bulb at the base of the bulb, and which would be reflected by the reflector so as toissue from the lamp upwardly relative to the axis of the reflector inuse from striking the reflector.
  • FIG. 1 is a sectional view of a sealed beam lamp for a road vehicle
  • FIG. 2 is a sectional view on the line 2-2 in FIG. I,
  • FIG. 3 is a perspective view of the quartziodine bulb shown in FIG. 1,
  • FIG. 4 is a perspective view of a light shield shown in FIG. 1 and f t
  • FIG. 5 is a perspective view of the ceramic bulb support shown in FIG. 1, it being appreciated that FIGS. 1'to 5-are not all drawn to the same scale.
  • the lamp includes an outer casing 11 adapted-at 12 to be secured to a road vehicle.
  • a sealed beam lamp unit 14 including a paraboloidal reflector 15 and an integral lens 16, the sealed enclosure defined by the lens 16' and the reflector 15 being filled with an inert atmosphere.
  • ThereflectorlS is mouldedjin glass and secured to the outer surface thereof is a pair of conductive blade terminals 17, 18.
  • Extending through sealed pinches 19, 21 in the reflector 15, adjacent the terminals 17, 18 is a pair of stiff conductive leads 22, 23 electrically connected respectively to the terminals 17, 18.
  • the production of the pinches 19, 21 results in local distortion of the inner surface of the reflector adjacent the pinches and when the inner surface of the reflector is aluminized to render it highly reflective the area of the inner surface of the reflector 15 adjacent the pinches 19, 21 is masked so that the distorted areas of the reflector are not aluminized. Thus the amount of light which will be scattered by the distorted areas of the reflector 15 is minimized.
  • the leads 22, 23 extend forwardly from the reflector, for a short distance, parallel with the axis of the reflector and are then bent through 90 to extend towards one another for a further short distance.
  • ⁇ Extending parallel with the axis of the reflector are a further pair of conductive leads 24, 25 which are welded at one end to the free ends of the leads 22, 23 respectively.
  • the leads 24, 25 extend through corresponding parallel bores 27 in a ceramic bulb support member 26.
  • the member 26 comprises a rectangular block 28 of ceramic material having a pair of parallel fingers 29 integral therewith and extending from one end thereof.
  • the end of the block 28 remote from the fingers 29 is formed with a transverse groove 31 in which the bent portions of the leads 22, 23 lie.
  • the bores 27 extend from the base of the groove 31 and terminate between the fingers 29.
  • the bulb 32 comprises a generally cylindrical quartz envelope 33 housing a tungsten filament 34.
  • the base of the bulb 32 is formed by a pinch 35 and enclosed in thickened edges 36 of the pinch 35 area pair of conductive ribbons 37, 38 which at one end are interconnected by the filament 34 and which at their other ends are connected to the leads 24, 25 respectively so that an electrical circuit between the terminals 17, I8 is completed through the filament 34.
  • a rear light shield 41 Trapped between the base of the: bulb 32 and the member 26 is a rear light shield 41 which includes a pair of side portions 42 which extend parallel with the axis of the reflector l5 and which masks the edges 36 of the pinch 35 and the deformed parts of the envelope 33 adjacent the edges 36, and a top portion 43.
  • the portion 43 includes a part 430 which ex tends at right angles to the axis of the reflector l5 and integral with the part 43a is a further part 43b which extends parallel with the axis of the reflector. The portion 43 masks the deformed part of the envelope 33 adjacent the web 39 which is uppermost in use.
  • the shield 46 is in the form of a cup-shaped member which encloses the forward end of the envelope 33.
  • the shield 46 includes a resilient metal strip 47 which engages the envelope 33 at a pair of spaced points and the shield 46 itself engages the envelope at a third point which is the lower most point of the envelope 33 in use, so that the envelope is held against movements in directions transverse to the axis of the reflector 15 by the shield 46 and the rod 45, in addition to member 26.
  • the manufacture of the envelope 33 involves the formation of a pinch 33a at the end of the envelope.
  • the edge of the shield 46 lies on the surface of a cone having its apex at the center of the filament 34 and its base at the front edge of the reflector so that any light from the filament 34 which is travelling in a directionsuch that it would pass directly through the lens 16, without first being reflected from the reflector 15 is blocked by the shield 46.
  • the leads 24, 25 are welded to the ribbons 37, 38 of the bulb 32 and the rear shield 41 is engaged with the base of the bulb 32, a pair of tags 42a integral with the side portions 42. of the shield 41 being deformed to grip the web 39 of the bulb 32.
  • the bulb 32 and shield 41 are then engaged between the fingers 29 of the member 26 with the leads 24, 25 extending through the bores 27 of the member 26 into the groove 31.
  • the ends of the leads 24, 25 are then welded to the ends of the leads 22, 23 respectively so that the bent portion leads 22, 23 lie in the groove 31.
  • the shield 46 is then engaged with the envelope 33 of the bulb 32 and is moved to its correct position, a tag 47a integral with the strip 47 of the shield 41 being welded to the rod 45 to support the bulb 32 firmly in position relative to the reflector 15.
  • the side portions 42 and the top portion 43 of the rear shield 41 block all of the light which would produce such a divergent beam with exception of that part of the light issuing from the lower most part of the envelope 33 which would result in a divergent beam directed downwardly onto the road.
  • the portion 43 of the shield 41 is also positioned to block any light which would be reflected from the deformed area of the reflector 15 around the pinch 44, since the area around the pinch 44 unlike the areas around the similar pinches 19, 21- is aluminized when the reflector is manufactured and so is highly reflective.
  • the area around the pinch 44 is not masked with the areas around the pinches 19, 21 during the aluminizing process, since it has been found more convenient to utilize the shield 41 to prevent reflection from the area around the pinch 44.
  • the light shield 46 and in particular the light shield 41, are so constructed that they do not scatter the light which they are intended to block in directions which would have deleterious effects on the accurate high intensity beam issuing from the lamp.
  • a lamp for a road vehicle comprising in combination a reflector, a lens defining with said reflector an enclosure, a pair of terminals at the exterior of said enclosure, a pair of leads extending from said terminals through the reflector into said enclosure, a high intensity quartz halogen bulb having an envelope and a filament within said envelope, the ends of said filament extending through a sealed, deformed portion of said envelope to a position external of said envelope, support means fixedly mounting said bulb in said enclosure, means connecting said lead to said ends of the filament to complete a circuit from said terminal to the filament, a first light shield, means mounting said first light shield within said enclosure to prevent light from the bulb issuing from the lamp without first striking the reflector, a second light shield, and means mounting said second light shield between said deformed portion of said envelope and the reflector to prevent light refracted by said deformed portion of the envelope striking the reflector and then issuing from the lamp upwardly relative to the axis of the reflector.

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
US750165A 1967-08-16 1968-08-05 High intensity vehicle lamp with shield preventing unwanted reflection Expired - Lifetime US3553519A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB37696/67A GB1221947A (en) 1967-08-16 1967-08-16 Lamps for road vehicles

Publications (1)

Publication Number Publication Date
US3553519A true US3553519A (en) 1971-01-05

Family

ID=10398355

Family Applications (1)

Application Number Title Priority Date Filing Date
US750165A Expired - Lifetime US3553519A (en) 1967-08-16 1968-08-05 High intensity vehicle lamp with shield preventing unwanted reflection

Country Status (8)

Country Link
US (1) US3553519A (xx)
JP (1) JPS4819035B1 (xx)
BE (1) BE719624A (xx)
DE (1) DE1797103A1 (xx)
ES (1) ES357562A1 (xx)
GB (1) GB1221947A (xx)
NL (1) NL6811615A (xx)
SE (1) SE354905B (xx)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3688149A (en) * 1970-10-01 1972-08-29 Westinghouse Electric Corp Vehicle headlamp having a dual-segment reflector
US3904904A (en) * 1973-04-28 1975-09-09 Philips Corp Sealed beam headlight
US3904864A (en) * 1973-05-29 1975-09-09 Kenneth James Jones Vehicle lamp assemblies
US3909607A (en) * 1973-10-18 1975-09-30 Thorn Electrical Ind Ltd Sealed-beam lamp construction
US4241391A (en) * 1978-02-27 1980-12-23 Westinghouse Electric Corp. Inner lamp-mount assembly for sealed-beam headlamp and similar lighting apparatus
US4268895A (en) * 1977-12-29 1981-05-19 Ichikawa Press Industries Co., Ltd. Automotive headlight
US4344119A (en) * 1979-07-19 1982-08-10 Cibie Projecteurs Headlamps having sealed optical units and replaceable light bulbs
US4564783A (en) * 1982-07-09 1986-01-14 Patent-Treuhand Gesellschaft Fur Elektrische Gluhlampen Gmbh Halogen incandescent lamp-and-reflector unit
US4747029A (en) * 1986-11-13 1988-05-24 General Motors Corporation Headlamp assembly
US4882660A (en) * 1986-11-13 1989-11-21 General Motors Corporation Headlamp assembly
FR2648273A1 (fr) * 1989-06-07 1990-12-14 Blv Licht Vakuumtechnik Gmbh Bloc-lampe comprenant une lampe electrique
WO2001055636A1 (en) 2000-01-27 2001-08-02 Honeywell International Inc. Method and apparatus for dehydrating a vehicle lamp housing
US20060077664A1 (en) * 2004-10-08 2006-04-13 Coretronic Corporation Light blocking apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU529733B2 (en) * 1978-01-28 1983-06-16 Carello Lighting Plc Vehicle headlamp assembly
US11660683B2 (en) * 2018-09-14 2023-05-30 Hydroblock S.R.L. Device for restraining/locking mechanical parts on machine tools

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1250030A (en) * 1917-02-03 1917-12-11 Lillie E Schickerling Electric-lamp attachment.
US1772175A (en) * 1927-07-07 1930-08-05 Monogram Lens Corp Headlight for producing multicolored beams
US2826710A (en) * 1953-07-28 1958-03-11 Willis L Lipscomb Reflector type lamp

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1250030A (en) * 1917-02-03 1917-12-11 Lillie E Schickerling Electric-lamp attachment.
US1772175A (en) * 1927-07-07 1930-08-05 Monogram Lens Corp Headlight for producing multicolored beams
US2826710A (en) * 1953-07-28 1958-03-11 Willis L Lipscomb Reflector type lamp

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3688149A (en) * 1970-10-01 1972-08-29 Westinghouse Electric Corp Vehicle headlamp having a dual-segment reflector
US3904904A (en) * 1973-04-28 1975-09-09 Philips Corp Sealed beam headlight
US3904864A (en) * 1973-05-29 1975-09-09 Kenneth James Jones Vehicle lamp assemblies
US3909607A (en) * 1973-10-18 1975-09-30 Thorn Electrical Ind Ltd Sealed-beam lamp construction
US4268895A (en) * 1977-12-29 1981-05-19 Ichikawa Press Industries Co., Ltd. Automotive headlight
US4241391A (en) * 1978-02-27 1980-12-23 Westinghouse Electric Corp. Inner lamp-mount assembly for sealed-beam headlamp and similar lighting apparatus
US4344119A (en) * 1979-07-19 1982-08-10 Cibie Projecteurs Headlamps having sealed optical units and replaceable light bulbs
US4564783A (en) * 1982-07-09 1986-01-14 Patent-Treuhand Gesellschaft Fur Elektrische Gluhlampen Gmbh Halogen incandescent lamp-and-reflector unit
US4747029A (en) * 1986-11-13 1988-05-24 General Motors Corporation Headlamp assembly
US4882660A (en) * 1986-11-13 1989-11-21 General Motors Corporation Headlamp assembly
FR2648273A1 (fr) * 1989-06-07 1990-12-14 Blv Licht Vakuumtechnik Gmbh Bloc-lampe comprenant une lampe electrique
WO2001055636A1 (en) 2000-01-27 2001-08-02 Honeywell International Inc. Method and apparatus for dehydrating a vehicle lamp housing
US6422729B1 (en) 2000-01-27 2002-07-23 Honeywell International Inc. Method and apparatus for dehydrating a vehicle lamp housing
US20060077664A1 (en) * 2004-10-08 2006-04-13 Coretronic Corporation Light blocking apparatus
US7160011B2 (en) * 2004-10-08 2007-01-09 Coretronic Corporation Light blocking apparatus

Also Published As

Publication number Publication date
JPS4819035B1 (xx) 1973-06-11
GB1221947A (en) 1971-02-10
ES357562A1 (es) 1970-03-16
NL6811615A (xx) 1969-02-18
DE1797103A1 (de) 1970-12-03
SE354905B (xx) 1973-03-26
BE719624A (xx) 1969-02-03

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