That is A wind charger That was made by Winco corp . They were Sold under many different names. Including Sears & Roebuck ,Montgomery Wards & others.I have had several of them over the years .I took one of Them and put ceramic mags in it , and it worked pretty good. But it cogged . I tried to use it to charge a 12v battery and burnt out the field coils.With the ceramic it would start charging the 12v battery at about 12 mph. I had a fast 5ft prop on it. Not very good but it was better than nothing.
I still have One That has not been modified but the governor is bent a little . I Am going to try to take it apart and rebuild it.
Or just replace the bent straps . and try to get it in balance.
The slip rings That they come with are a real pain i get rid of them and just run the wire down the center of the yaw pipe.