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    Summary

    Description
    English: A graphical calculator for calculating electrical quantities in transmission lines.
    Date
    Source US Patent
    Author A. G. Davis (Attorney), Edith Clarke

    Licensing

    Public domain
    This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1931.
    Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
    Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:EdithClarkeCalculatorUSPatentDrawing.png

    Captions

    A graphical calculator for calculating electrical quantities in transmission lines.

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    Date/TimeThumbnailDimensionsUserComment
    current08:12, 7 June 2023Thumbnail for version as of 08:12, 7 June 2023608 × 912 (212 KB)User-duckCropped 26 % horizontally, 22 % vertically using CropTool with lossless mode.
    21:53, 12 October 2021Thumbnail for version as of 21:53, 12 October 2021826 × 1,169 (531 KB)Rich FarmbroughUploaded a work by A. G. Davis (Attorney), Edith Clarke from US Patent with UploadWizard

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