hammer and arm typewriter OR qwerty -arm-chair

hammer and arm typewriter OR qwerty -arm-chair
"hammer and arm" OR "hammer arm" OR "hammer key" typewriter OR qwerty -arm-chair

I am pretty sure but not entirely certain that these included superscript "st," "nd," and "th." It was a traditional hammer-arm design with a carriage that raised, and it showed both horizontal and vertical misalignment.

hammer-arm design

Binds in hammer arm, control arm, and platen.

The pivotal hammer arm also includes a cam follower roller which is spring biased to engage a rotatable cam driven by a reversible electric motor.

http://fullermusic.blogspot.com/2006/10/good-vibrations.html
fullermusic: Good Vibrations