gloves, rings, any kind of jewelry, long sleeves and untucked shirts were always frowned upon when using mills, lathes, drill presses, saws, etc. back in the day
Add long hair to the list too!...
Back around 1976 I was a teen aged hippie with "Jesus hair",as my dad called it--one day I was tuning up my '63 VW Beetle and decided to use a timing light to see how close the "static timing" method was compared to the strobe light,and a gust of wind blew my hair into the spinning generator pulley..
It ripped a lot out,and part of my scalp with it !
Two days later after the scalped spot stopped weeping blood,I went with my dad and got a "buzz cut"...he had a grin on his face the whole time,going there,watching my hair get chopped off,and driving back home..
My friends were also quite amused,I got a lot of ribbing for getting my hair cut like a marine..
Another dangerous this to have on is a hoodie with draw strings to tighten the hood around your head..had those get sucked into a spinning pulley or belt or engine before and was lucky they were only ripped clean out of the hoodie instead of yanking my face into the spinning machinery!..