(19)
(11) EP 0 232 843 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
07.06.1989 Bulletin 1989/23

(43) Date of publication A2:
19.08.1987 Bulletin 1987/34

(21) Application number: 87101484.1

(22) Date of filing: 04.02.1987
(51) International Patent Classification (IPC)4: F21M 3/10, H01K 1/14, F21M 3/02
(84) Designated Contracting States:
BE DE FR GB NL

(30) Priority: 06.02.1986 US 826526

(71) Applicant: GTE Products Corporation
Wilmington, DE 19801 (US)

(72) Inventors:
  • Levin, Robert E.
    So. Hamilton MA 01982 (US)
  • English, George J.
    Reading MA 01867 (US)

(74) Representative: Lemke, Jörg-Michael, Dipl.-Ing. 
Schmiedstrasse 1, Hausen
D-86447 Aindling
D-86447 Aindling (DE)


(56) References cited: : 
   
       


    (54) Motor vehicle headlight


    (57) A motor vehicle headlight including a parabolic reflector (13), a cover (23) secured to the reflector and a lighting capsule (27) located within the reflector. The capsule includes an envelope (29) having a coiled filament (31) located therein and including a substantially cylindrical configuration. Optimum light output is attained by providing the reflector with a short focal length (0.2 inch to about 0.5 inch) and by utilization of a coiled filament structure having a length to diameter ratio of less than about 2:1. The result is a headlight having an overall vertical height of only about two inches and a corresponding frontal area of extremely small size (between 3.0 and 7.5 square inches).







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