Rings (actually, jewelry of any type) were a big NO-NO where I worked for many years. Too much machinery and electrical components in my line of work. We couldn't even wear metal-framed prescription glasses if opening/entering an electrical cabinet (they ranged from 10 volts DC to 600 volts AC).
I personally know one guy (and know of another) who had their ring fingers evacuated from their hands using only the weight and momentum of their hanging bodies. One was climbing off a scaffold, holding with his left hand, and his foot slipped. The ring got caught on one of the assembly pins and POP, off came his finger, cleanly at the joint. Same thing happened to another guy while jumping off the back of a flatbed truck with stake-pocket side-bodies. He was holding the top stake on one of the side-body panels (at the top) and when he jumped, his ring was caught on the metal frame part. Immediate case of "Digitus Gone-icus".
The first week I was married, I took mine off in the shower to get grease out from under it. I laid it on the shower shelf and I forgot to put it back on. My wife found it and went into a fit. She did calm down after I let her in on the fact that I took it off 8 1/2 hours every day at work....but I did carry it in my pocket. She wore it on a chain around her neck for the 4 weeks I was in ICU.