Using slow motion video Bill Hammack, the engineer guy, shows how
<br>IBM's revolutionary "golf ball" typewriter works. He describes the
<br>marvelous completely mechanical digital-to-analogue converter that
<br>translates the discrete impulse of the keys to the rotation of the
<br>type element. (This is the typewriter featured on the television series Mad Men.)

Using slow motion video Bill Hammack, the engineer guy, shows how IBM's revolutionary "golf ball" typewriter works. He describes the marvelous completely mechanical digital-to-analogue converter that translates the discrete impulse of the keys to the rotation of the type element. (This is the typewriter featured on the television series Mad Men.)

The IBM Selectric & its mechanical digital-to-analogue converter

Bill Hammack's audio and video work emphasizes the creative role of engineers in designing and creating our world. He's a regular commentator on radio - based at Illinois Public Radio in Urbana he's appeared on public radio's premier business program Marketplace, and on Radio National Australia's Science Show. Many engineering, science, and journalistic groups have recognized his work.

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The IBM Selectric & its mechanical digital-to-analogue converter

The IBM Selectric & its mechanical digital-to-analogue converter