u/zenunseen

BIL had this in his basement and we were wondering if anyone had any more info on it. Google says they were produced between 1918-1920.

I think all the parts are there but there are what looks like two large rings, (cast aluminum?) shattered to pieces.

I've never seen one of these up close but I'm suddenly extremely interested in it so any info would be much appreciated.

I can get more pics of anyone's interested