US3819931A - Vehicle lamps - Google Patents

Vehicle lamps Download PDF

Info

Publication number
US3819931A
US3819931A US00214250A US21425071A US3819931A US 3819931 A US3819931 A US 3819931A US 00214250 A US00214250 A US 00214250A US 21425071 A US21425071 A US 21425071A US 3819931 A US3819931 A US 3819931A
Authority
US
United States
Prior art keywords
sheet
recess
slits
reflector
flexed
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
US00214250A
Other languages
English (en)
Inventor
S Green
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 US3819931A publication Critical patent/US3819931A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/50—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
    • F21S41/55—Attachment thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/39—Attachment thereof

Definitions

  • the reflector is formed from 56] References Cited a sheet of reflective material which has slits therein to enable it to be deformed to conform to the shape of UNITED STATES PATENTS the wee 805,247 11/1905 Thompson 113/116 A 865,173 9/1907 Eichberg 113/116 A 6 Claims, 4 Drawing Figures VEHICLE LAMPS This invention relates to vehicle lamps.
  • a lamp according to the invention includes a lamp body having therein a recess within which a bulb is located in use, and a reflector positioned within the recess, the shape of said recess being non-developable and the reflector being constituted by a sheet of reflective material in facial contact with the surface of the recess and having therein a plurality of slits, the sheet following the surface of the recess as permitted by said slits and being secured to said surface.
  • the reflective material is self-adhesive.
  • the surface of said recess is provided with a layer of adhesive prior to insertion of said sheet of reflective material.
  • said recess is in the form of a frustum and the sheet is in the form of an annulus having a segment thereof missing, the sheet being flexed to frusto-conical form and then distended, as permitted by the slits, to follow the surface of the recess.
  • the invention further resides in a method of providing a reflector within a lamp body having a recess therein of non-developable shape, the method comprising forming a sheet of reflective material, having a plurality of slits therein, to the shape of annulus having a segment thereof missing, flexing the sheet to frustoconical form, inserting the flexed sheet into said recess, distending the flexed sheet, as permitted by the slits therein, to follow the surface of the recess, and securing the sheet to the surface of the recess.
  • FIG. I is a perspective view, partly broken away, showing a vehicle lamp
  • FIG. 2 is a plan view of a sheet of reflective foil from which the reflector of the lamp is formed
  • FIG. 3 is a perspective view showing how the sheet is flexed.
  • FIG. 4 is a diagramatic representation of an alternative slit pattern for the sheet.
  • the lamp includes a metal lamp body 11 which in use is secured to a body panel of a road vehicle.
  • the body 11 is formed with a recess 12 the surface of which is generally paraboloidal.
  • the surface 12 is non-developable, that is to say cannot be represented in a single plane without distortion thereof.
  • the wider open end of the recess is normally closed by a lens which may be coloured in the usual manner, and the opposite, narrowerend of the recess is closed by a bulb holder (not shown) which in use supports a bulb within the recess 12.
  • a reflector 13 in order to improve the efficiency of the lamp there is provided a reflector 13, the reflector 13 being constituted by a sheet of reflective foil which is secured to the surface of the recess 12.
  • the reflector 13 is formed by cutting a flat sheet of reflective foil to the fonn of an annulus having a segment thereof removed (FIG. 2).
  • the sheet of reflective-foil from which the annulus is cut is formed with a plurality of spaced, parallel slits 14 the slits being arranged in parallel spaced rows, with the slits of each row spaced from one another.
  • the slits of each row are also displaced from the slits of the adjacent rows along the length of the rows.
  • the annulus cut from the sheet is flexed to form the frusto-conical shape shown in FIG. 3, the angle of the frustum being dependent upon the radii of the annulus, and the angle subtended by the missing segment, and
  • One surface of the foil is highly reflective, and the other surface of the foil is provided with an adhesive coating, the frustum being formed with the adhesive coating on its outer surface, and the highly reflected surface innermost.
  • the dimensions of the annulus cut from the sheet are such that when the frustum is inserted into the recess 12, then the opposite ends of thefrustum respectively engage opposite ends of the recess.
  • the frustum is then distended outwardly to follow the shape of the recess 12, and is pressed firmly against the surface of the recess 12, so that the adhesive provided on the frustum secures the foil to the body 11.
  • the distension of the frustum is permitted by the slits 14 provided in the foil, and the slits l4 permit distension such that the foil follows the surface of the recess 12 without ripping, or creasing of the foil.
  • the recess in the body need not be paraboloidal, the sheet of foil being cut to a suitable shape so that when flexed, and distended, it will follow the surface of the recess.
  • the foil is spot welded to the body 11.
  • the sheet could be an aluminised synthetic resin material.
  • FIG. 4 shows an alternative slit pattern where two sets of slits at to one another facilitate distensions of the sheet in all directions.
  • the recess in the body is of circular cross-section it will be appreciated that the slit pattern of the sheet of reflective material could consist of slits aligned in concentric circular rows having their centre on the axis of the annulus of reflective material.
  • a vehicle lamp including a lamp body having therein a bulb receiving recess, and a reflector positioned within said recess, the shape of said recess, as defined by its inner surface, being non-developable and said reflector being constituted by a sheet of reflective material lying against the whole of said inner surface of said recess and having a plurality of slits therein, said slits extending over substantially the whole of said sheet, and said sheet following said surface of said recess and being secured to said surface.
  • a method of providing a reflector within a lamp body having a recess therein of non-developable shape comprising the steps of forming a sheet of reflective material to the shape of an annulus having a 3 ,8 19,93 1 3 4 segment thereof missing, slitting said sheet at a plurality tending said flexed sheet to follow the surface of said of locations extending over substantially the whole of recess, and securing said sheet to said surface of said the surface thereof, flexing said sheet to frusto-conical recess.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
US00214250A 1971-01-13 1971-12-30 Vehicle lamps Expired - Lifetime US3819931A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB158971*[A GB1365893A (en) 1971-01-13 1971-01-13 Vehicle lamps

Publications (1)

Publication Number Publication Date
US3819931A true US3819931A (en) 1974-06-25

Family

ID=9724563

Family Applications (1)

Application Number Title Priority Date Filing Date
US00214250A Expired - Lifetime US3819931A (en) 1971-01-13 1971-12-30 Vehicle lamps

Country Status (9)

Country Link
US (1) US3819931A (de)
JP (1) JPS5224797B1 (de)
AU (1) AU462245B2 (de)
DE (1) DE2201197C3 (de)
ES (2) ES176441Y (de)
FR (1) FR2121803B1 (de)
GB (1) GB1365893A (de)
IT (1) IT950567B (de)
ZA (1) ZA718506B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD746508S1 (en) * 2014-06-11 2015-12-29 Axis Sourcing Group, Inc. Combined bottle light and shade
USD768911S1 (en) * 2015-04-23 2016-10-11 Axis Sourcing Group, Inc. Combined bottle light and shade

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4789921A (en) * 1987-02-20 1988-12-06 Minnesota Mining And Manufacturing Company Cone shaped Fresnel reflector
DE102008029743A1 (de) * 2008-06-25 2009-12-31 Manfred Grimm Verfahren zur Herstellung eines Downlight-Reflektors

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US805247A (en) * 1905-06-10 1905-11-21 George L Thompson Deflector for fans.
US865173A (en) * 1906-09-12 1907-09-03 Otto Frederick Eichberg Expanded receptacle.
US1637429A (en) * 1925-10-02 1927-08-02 Stewart James Milne Glareless lamp
DE845483C (de) * 1951-02-20 1952-07-31 Werner Dr Med Cadura Blendschutzvorrichtung an Scheinwerfern von Kraftfahrzeugen und Fahrraedern
US2784306A (en) * 1953-06-30 1957-03-05 Oscar I Johnson Illuminated christmas tree ornament
US2907873A (en) * 1956-05-23 1959-10-06 Richard T Smith Reflector for lamps
US3541326A (en) * 1968-08-19 1970-11-17 Aladdin Ind Inc Reflector for hydrocarbon burning lamps

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE469834C (de) * 1927-12-09 1928-12-21 Schwabe & Co A G Reflektoren mit Metallfolien
DE1669488U (de) * 1953-04-16 1953-12-31 Blaupunkt Elektronik Gmbh Reflektor.
FR1325680A (fr) * 1962-03-06 1963-05-03 Dispositif pour produire des images lumineuses variables
GB1253992A (en) * 1968-06-14 1971-11-17 Lucas Industries Ltd Vehicle lamps

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US805247A (en) * 1905-06-10 1905-11-21 George L Thompson Deflector for fans.
US865173A (en) * 1906-09-12 1907-09-03 Otto Frederick Eichberg Expanded receptacle.
US1637429A (en) * 1925-10-02 1927-08-02 Stewart James Milne Glareless lamp
DE845483C (de) * 1951-02-20 1952-07-31 Werner Dr Med Cadura Blendschutzvorrichtung an Scheinwerfern von Kraftfahrzeugen und Fahrraedern
US2784306A (en) * 1953-06-30 1957-03-05 Oscar I Johnson Illuminated christmas tree ornament
US2907873A (en) * 1956-05-23 1959-10-06 Richard T Smith Reflector for lamps
US3541326A (en) * 1968-08-19 1970-11-17 Aladdin Ind Inc Reflector for hydrocarbon burning lamps

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD746508S1 (en) * 2014-06-11 2015-12-29 Axis Sourcing Group, Inc. Combined bottle light and shade
USD768911S1 (en) * 2015-04-23 2016-10-11 Axis Sourcing Group, Inc. Combined bottle light and shade

Also Published As

Publication number Publication date
DE2201197C3 (de) 1981-12-24
AU3728571A (en) 1973-06-28
JPS5224797B1 (de) 1977-07-04
DE2201197A1 (de) 1972-08-03
ZA718506B (en) 1972-09-27
DE2201197B2 (de) 1981-04-02
ES176441Y (es) 1973-06-16
ES399126A1 (es) 1974-10-16
AU462245B2 (en) 1975-06-19
GB1365893A (en) 1974-09-04
IT950567B (it) 1973-06-20
FR2121803A1 (de) 1972-08-25
FR2121803B1 (de) 1979-01-12
ES176441U (es) 1972-12-16

Similar Documents

Publication Publication Date Title
US4241388A (en) High contrast lamp assembly
US4789921A (en) Cone shaped Fresnel reflector
KR840007162A (ko) 압력 경감 장치
US3819931A (en) Vehicle lamps
GB1347338A (en) Lighting reflector
GB1481938A (en) Corrugated reflector
US4839975A (en) Lighting system for car top sign
GB1501497A (en) Flashlamp unit
ES251345Y (es) Una lampara de vehiculo con varias bombillas incandescentes
US3737653A (en) Automotive headlight
US2143149A (en) Light directing shield
US2673285A (en) Light reflecting cover for lamps
US2298588A (en) Small lamp reflector
US1027621A (en) Light-shield.
KR890002604A (ko) 자동차용 전구
JPS59173201U (ja) 車輛用灯具
US2438684A (en) Electric lamp
US2075206A (en) Lighting fixture
GB1312908A (en) Lamp-shades
GB1382051A (en) Vehicle lamps
USD263762S (en) Lamp base
US2612616A (en) Vehicle headlight
GB1371194A (en) Vehicle lamps
YU180277A (en) Headlight for automobile vehicles with a light beam for the dimmed headlight and the spotlight
US1767160A (en) Light-reflecting unit and means for supporting the same