No longer will it be necessary to keep airplane landing fields brilliantly lighted all night when a new invention only recently demonstrated is perfected to the point of being manufactured in quantity. The noise made by the hum of an airplane 1000 ft. in the air closed the switch that lighted a bank of flood lights at Bettis Field, McKeesport, in the first demonstration of the sound sensitive automatic lighting apparatus developed by T. Spooner, an electrical research engineer.


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    Title :

    Drone of airplane illuminates landing field


    Published in:

    Journal of the A.I.E.E. ; 46 , 11 ; 1208


    Publication date :

    1927-11-01


    Size :

    351067 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



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