Take this with a pound of salt ......... but looking at patent #662,691 , I would think loosening the nut and placing a rod that just goes in the hole on the handle end and tapping that rod would start it apart . Again I do NOT KNOW , might need someone with a little machinist knowledge to look at the drawings .
https://patentimages.storage.googleapis.com/08/d5/50/ad30f9cac6db57/US662691.pdf