How an Antique Pencil Sharpener Works

Leaving aside electric pencil sharpeners, how do these machines work? The simplest modern pencil sharpner, in which you twist the pencil, uses what I've learned is called a manual prism. If you turn a crank, then you're usually operating helical blades to grind off graphite and wood.

This pencil sharpener from the 1890s is quite different. As far as I can tell, the machine positions the pencil against a grinding plate at just the right angle. YouTuber Resuce and Restore brought this antique back into service. It's one of several fascinating old pencil sharpeners illustrated in a playlist.

-via Steampunk Tendencies


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