typebar

plural typebars

1. In some typewriters, an arm actuated by pressing the keys that carried the type to strike the ribbon to form a letter.

   The speedy, well-engineered Underwood was eventually so successful that within a couple of decades, the vast majority of typewriters followed its model: They were single-shift, frontstroke, typebar typewriters with four-bank QWERTY keyboards, inked by a ribbon.

   2018, Mark J. P. Wolf, The Routledge Companion to Media Technology and Obsolescence