To reply to my own post,
As they say Google is your friend.
For anyone interested:
A 1925 Popular science article has a user comment where he applied these transformers to a Regen Receiver that he built. (right side of page small print)
http://books.google.com/books?id=4ygDAAAAMBAJ&pg=PA84&dq=Thordarson+Autoformer#v=onepage&q=Thordarson%20Autoformer&f=false See , It does have to do with regen radios.
Now, does anyone have a mid-late 20s Thordarson catalog that they can copy the data and circuit diagrams from. It is too difficult to read the ones pictured in the P.E. pages.
Bill KB3DKS in 1 Land