I wish the article talked more about how the machine actually worked. It seemed pretty simplistic and glossed over most of the details, but now I'm really curious and want answers lol.
Maybe: https://www.asme.org/about-asme/engineering-history/landmark...
To see a typecaster which works find a Linotype or Monotype.
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As linked in the article, you could read the patent application:
https://circuitousroot.com/artifice/letters/press/noncastcom...