Typebar

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A typebar is an 'arm' inside a typewriter with a character on the end of it. There are generally two characters per typebar, one which will be printed if the corresponding key is struck by itself, the other of which will be printed if the corresponding key is struck while the shift key is depressed. Prior to the advent of the electronic typewriter, the typebars would often jam when two or more keys were depressed simultaneously. Such jamming led to the creation of the QWERTY keyboard.

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