With a cast iron frame designed to be screwed down to the desktop, this machine eliminated the need for whittling and sanding pencils, and saved businesses countless hours in lost productivity.
It’s called a “Planetary Pencil Sharpener” because it relies on planetary gears revolving around a sun gear, and all are held in place with a ring gear.
Spirograph worked on the same basic principal, but it sure as hell couldn’t sharpen a pencil.
