GB203471A - Improvements in lamp bulbs for vehicle headlights and the like - Google Patents

Improvements in lamp bulbs for vehicle headlights and the like

Info

Publication number
GB203471A
GB203471A GB121722A GB121722A GB203471A GB 203471 A GB203471 A GB 203471A GB 121722 A GB121722 A GB 121722A GB 121722 A GB121722 A GB 121722A GB 203471 A GB203471 A GB 203471A
Authority
GB
United Kingdom
Prior art keywords
substance
lamp
light
reflecting
blue
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
GB121722A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB121722A priority Critical patent/GB203471A/en
Publication of GB203471A publication Critical patent/GB203471A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • H01K1/32—Envelopes; Vessels provided with coatings on the walls; Vessels or coatings thereon characterised by the material thereof
    • H01K1/325—Reflecting coating

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

203,471. Williams, L. G. Oct. 10, 1922. Motor vehicle head lamps. - An incandescent lamp bulb for motor - vehicle headlights and the like has substantially one half of its area covered with a reflecting substance and, in addition, with a substance which absorbs red rays and is so positioned as to filter the light in a direction along the normal line of sight ahead of the lamp. The lamp shown has a portion of its lower surface c covered with a substance such as mercury or silver which cooperates with the upper part of the paraboloid reflector to throw the emergent light outwards and downwards without glare. A small coating b of varnish or pigment having blue as its base absorbs red rays in directions ahead of the light source d, correct focusing of which is effected by means of a thumb-screw f. A small transparent gap may be left in the reflecting substance or between the blue and reflecting coatings to allow a small beam of unfiltered light to fall on the road near the lamp.
GB121722A 1922-10-10 1922-10-10 Improvements in lamp bulbs for vehicle headlights and the like Expired GB203471A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB121722A GB203471A (en) 1922-10-10 1922-10-10 Improvements in lamp bulbs for vehicle headlights and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB121722A GB203471A (en) 1922-10-10 1922-10-10 Improvements in lamp bulbs for vehicle headlights and the like

Publications (1)

Publication Number Publication Date
GB203471A true GB203471A (en) 1923-09-13

Family

ID=9718156

Family Applications (1)

Application Number Title Priority Date Filing Date
GB121722A Expired GB203471A (en) 1922-10-10 1922-10-10 Improvements in lamp bulbs for vehicle headlights and the like

Country Status (1)

Country Link
GB (1) GB203471A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005045883A2 (en) * 2003-11-06 2005-05-19 Koninklijke Philips Electronics N.V. Lamp with light absorbing coating

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005045883A2 (en) * 2003-11-06 2005-05-19 Koninklijke Philips Electronics N.V. Lamp with light absorbing coating
WO2005045883A3 (en) * 2003-11-06 2007-08-16 Koninkl Philips Electronics Nv Lamp with light absorbing coating

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