Oh bloody hell, ignore it- it's spouting again 
Realitea you are clearly the only one thinking about the dc in all this. So he says he's not going to shout? Based on the last interaction I doubt that very much.
You could, if you feel so inclined, take your own wedding ring off and simply sit down and tell him it's over. Don't give him a choice or a chance- just take control.
It'll go one of 2 ways: either he'll agree or he'll apologise. Only you can really know which it is most likely to be, and it can be a very high risk "strategy". For full disclosure, I have to tell you that I've done this once - I got my documents together and packed a bag for DS and I, hid the spare car key and kept mine in my pocket. Dh knew exactly how serious I was, especially when I told him that I had an appointment with a solicitor.
That was a year ago and followed a period where ILs criticised both of us very publicly and exceptionally unfairly. Dh defended FIL (who went NC with us anyway as it happens- a truly nasty cunt of a little man who cares about nothing but himself- not even his wife) - he wanted to essentially use DS as a pawn to stay "in his father's good books", I wanted to keep DS away from the toxicity dh had been exposed to all his life.
I won't bore you with any more of my story, but I didn't want you to think that I was blithely suggesting taking control. It's a big risk and it can go either way, which you would probably need to reconcile that in your own mind first before you act.
Hope this helps even in a tiny way xx