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GB1082497A - Reflector device - Google Patents

Reflector device

Info

Publication number
GB1082497A
GB1082497A GB31857/64A GB3185764A GB1082497A GB 1082497 A GB1082497 A GB 1082497A GB 31857/64 A GB31857/64 A GB 31857/64A GB 3185764 A GB3185764 A GB 3185764A GB 1082497 A GB1082497 A GB 1082497A
Authority
GB
United Kingdom
Prior art keywords
weight
per cent
mole per
beads
plate
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
Application number
GB31857/64A
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing 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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Priority to BE663355D priority Critical patent/BE663355A/fr
Publication of GB1082497A publication Critical patent/GB1082497A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F1/00—Designs or pictures characterised by special or unusual light effects
    • B44F1/02—Designs or pictures characterised by special or unusual light effects produced by reflected light, e.g. matt surfaces, lustrous surfaces
    • B44F1/04—Designs or pictures characterised by special or unusual light effects produced by reflected light, e.g. matt surfaces, lustrous surfaces after passage through surface layers, e.g. pictures with mirrors on the back
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/12—Reflex reflectors
    • G02B5/126—Reflex reflectors including curved refracting surface
    • G02B5/128—Reflex reflectors including curved refracting surface transparent spheres being embedded in matrix
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/26—Screens; Filters

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Glass Compositions (AREA)

Abstract

A reflex-reflecting shield mounted in a sealed beam lamp comprises a base plate, preferably of a malleable and ductile metal such as aluminium, at least one surface of which consists of glass beads firmly and partially embedded in the plate or bonded thereto with a glass enamel. Preferably the beads consist of: .43.5%.by weight of TiO2 .29.3%.by weight of BaO .14.3%.by weight of SiO2 .8.38%.by weight of Na2O .3.06%.by weight of B2O3 .1.44%.by weight of K2O and are bonded to the aluminium plate by coating the latter with an enamel slip and firing at 600 DEG C. for 5 minutes. The slip may consist of: .4.56.parts by weight of calcium silicate .3.44.parts by weight of boric acid .1.part by weight of pigment grade TiO2 .100.parts by weight of glass frit .45.parts by weight of water the glass frit consisting of: .15.6.mole per cent TiO2 .38.1.mole per cent SiO2 .1.1.mole per cent P2O5 .0.6.mole per cent Sb2O3 .4.7.mole per cent B2O3 .1.9.mole per cent ZnO .3.1.mole per cent CdO .0.6.mole per cent SrO .9.5.mole per cent K2O .17.1.mole per cent Na2O .7.7.mole per cent Li2O Before they are secured to the plate the beads are silvered, coated with hydrated alumina, and heated at 500 DEG C. to convert the coating to a highly porous solid composed of interlocking fibrils of gamma alumina. They may then be passed through a 6% aqueous dispersion of a fluorocarbon compound and dried at 300 DEG F., or subjected to some other surface treatment, e.g. silicone treatment. After firing, the silver and coating are removed by etching from the exposed portions of the beads. Instead of being bonded to the plate, the beads may be embedded therein by the method described in Specification 1,081,601.
GB31857/64A 1963-08-07 1964-08-05 Reflector device Expired GB1082497A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BE663355D BE663355A (en) 1964-08-04 1965-05-03

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US300475A US3292029A (en) 1963-08-07 1963-08-07 Sealed beam headlight with glassbeaded light reflecting shield

Publications (1)

Publication Number Publication Date
GB1082497A true GB1082497A (en) 1967-09-06

Family

ID=23159245

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31857/64A Expired GB1082497A (en) 1963-08-07 1964-08-05 Reflector device

Country Status (4)

Country Link
US (1) US3292029A (en)
DE (1) DE1447071A1 (en)
GB (1) GB1082497A (en)
SE (1) SE324962B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001013037A1 (en) * 1999-08-16 2001-02-22 German Gresser Combined high performance automobile headlight with variable light distribution, serving as a fog light, dipped beam light, high beam light and indicator light

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3535019A (en) * 1967-10-25 1970-10-20 Minnesota Mining & Mfg Metallized glass reflex-reflecting elements
US6355302B1 (en) 1999-12-10 2002-03-12 3M Innovative Properties Company Continuous process for making high performance retroreflective fabric
US8439525B2 (en) * 2008-08-29 2013-05-14 Abl Ip Holding Llc Luminaires having enhanced light distribution and applications thereof
US20100053971A1 (en) * 2008-08-29 2010-03-04 Abl Ip Holding Llc Asymmetric Lighting Systems and Applications Thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2379741A (en) * 1943-01-23 1945-07-03 Minnesota Mining & Mfg Reflex light reflector
US2379702A (en) * 1943-01-23 1945-07-03 Minnesota Mining & Mfg Reflex light reflector
US2876375A (en) * 1953-08-26 1959-03-03 Westinghouse Electric Corp Filament shield

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001013037A1 (en) * 1999-08-16 2001-02-22 German Gresser Combined high performance automobile headlight with variable light distribution, serving as a fog light, dipped beam light, high beam light and indicator light

Also Published As

Publication number Publication date
DE1447071A1 (en) 1969-04-17
SE324962B (en) 1970-06-15
US3292029A (en) 1966-12-13

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