GB226621A - Improvements in head lights for vehicles - Google Patents

Improvements in head lights for vehicles

Info

Publication number
GB226621A
GB226621A GB2417623A GB2417623A GB226621A GB 226621 A GB226621 A GB 226621A GB 2417623 A GB2417623 A GB 2417623A GB 2417623 A GB2417623 A GB 2417623A GB 226621 A GB226621 A GB 226621A
Authority
GB
United Kingdom
Prior art keywords
focus
lower half
paraboloid
half paraboloid
straight line
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
GB2417623A
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 GB2417623A priority Critical patent/GB226621A/en
Publication of GB226621A publication Critical patent/GB226621A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/162—Incandescent light sources, e.g. filament or halogen lamps
    • F21S41/168—Incandescent light sources, e.g. filament or halogen lamps having a filament arranged transversally to the optical axis of the illuminating device
    • 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
    • F21S41/32—Optical layout thereof
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles

Abstract

226,621. Strange, A. L. Sept. 28, 1923. Vehicle lamps. - In a vehicle lamp of the type described in Specification 13791/15, in which the reflector is formed of upper and lower half paraboloids A, B having a common axis E G, the focus b of the lower half paraboloid being in front of the focus a of the upper half paraboloid, the source of light consists of a horizontal transverse filament arranged above the common axis and between the transverse vertical planes through the two foci, and preferably below a straight line joining the lowest point B<1> on the front edge of the lower half paraboloid and its focus, and preferably below a straight line joining the highest point A<1> of the front edge of the upper half paraboloid and its focus.
GB2417623A 1923-09-28 1923-09-28 Improvements in head lights for vehicles Expired GB226621A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2417623A GB226621A (en) 1923-09-28 1923-09-28 Improvements in head lights for vehicles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2417623A GB226621A (en) 1923-09-28 1923-09-28 Improvements in head lights for vehicles

Publications (1)

Publication Number Publication Date
GB226621A true GB226621A (en) 1924-12-29

Family

ID=10207601

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2417623A Expired GB226621A (en) 1923-09-28 1923-09-28 Improvements in head lights for vehicles

Country Status (1)

Country Link
GB (1) GB226621A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4918580A (en) * 1987-11-05 1990-04-17 Koito Seisakusho Co., Ltd. Vehicle headlamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4918580A (en) * 1987-11-05 1990-04-17 Koito Seisakusho Co., Ltd. Vehicle headlamp

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