Never seen a "real" typewriter turned into terminal. This was what we all planned in 1970s but cheap matrix printers from Japan fulfilled the need.

I still have left-over Nazi Faber-Castell and 7 solenoids. I had a plan for notched rods and binary coding. Selected key had all the notched aligned and then a hook fall down and momentarily grappled rotating drum and BANG - a letter was printed.

Including "ü" and "ß", of course.