The vertical focusing adjustment for headlamps using two-filament lamps is not only unnecessary but so greatly complicates the correct focusing and aiming of the headlight beam that few persons can make the proper adjustment, asserted A. W. Devine of the Massachusetts Registry of Motor Vehicles, at the summer meeting of the Society of Automotive Engineers at French Lick, Ind., May 1927. He advocated dispensing with the requirement for double focusing in state motor vehicle regulations and declared that improvement in headlighting will be retarded if state laws or regulations require the vertical focusing adjustment in addition to the horizontal adjustment.


    Access

    Download


    Export, share and cite



    Title :

    Would simplify headlamp focusing


    Published in:

    Publication date :

    1927-07-01


    Size :

    318987 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    HEADLAMP UNIT AND HEADLAMP

    OSHIMA RITSUYA / SUWA MASASHIGE / KUWATA MUNEHARU et al. | European Patent Office | 2019

    Free access


    HEADLAMP AND HEADLAMP CONTROL SYSTEM

    NAKANO RYUICHI / INOUE NAOTO / TAKORI MASAYOSHI et al. | European Patent Office | 2022

    Free access

    HEADLAMP CONTROL DEVICE, HEADLAMP CONTROL METHOD, AND HEADLAMP SYSTEM

    KASE RYOSUKE / ISHII YUKI | European Patent Office | 2025

    Free access

    HEADLAMP CONTROL DEVICE, HEADLAMP CONTROL METHOD, AND HEADLAMP SYSTEM

    NAKAJIMA KO / WARAGAYA TAKESHI | European Patent Office | 2025

    Free access