Large Induction Coil
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The example shown above is relatively large - large enough to supply the high voltage for x-ray tubes. Although there is no identification on it, it was almost certainly built by the Thordarson Electrical Manufacturing Company. Probably sometime from 1910 to 1930.
It seems to be in very good shape, so it didn't see much use.
The image to the right of a Thordarson induction coil is from the 1912 Gaertner and Company Catalog.
The text is below.
Size: the base is 12.5" x 18" while the coil is 6.5" in diameter and 8.5" long.
Gaertner and Company. Electrical Apparatus and Supplies. 1912
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