The Mechanical Drafting Tool That Made Perfect Dotted Lines
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The Mechanical Drafting Tool That Made Perfect Dotted Lines
This tiny mechanical drafting tool once cost as much as an engineer’s monthly salary. It looks simple, but its internal cam system lifted and dropped the pen tip with precise timing, creating flawless dotted lines long before electricity or CAD existed. Engineers in the German Empire used it to automate one of the most annoying tasks in ...
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