Description of automatic control device for overhead type doors installed in shop of Indianapolis Railways; door raises or lowers when bus roof makes contact with overhead switch; three-phase motor is used in operation of door.


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    Title :

    Automatic door control saves time-labor for Indianapolis shop


    Additional title:

    Bus Transportation


    Published in:

    Publication date :

    1952


    Size :

    2 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English


    Keywords :