looking for "slide rules" or what similar devices would be called that use non-linear or multi-variate relationships
I'm sure this is off topic, but the closest I can think of is a slide rule and I'm sure some of you have adjacent interests in the world of flat mechanical computing devices or mechanisms.
like a linear or circular slide rule where at least 3 portions move and moving one moves another at a different rate. I'm thinking a simple 2d device, maybe with a gear, maybe a non-circular gear, maybe a couple of internal gears... but much simpler than something like a watch...
Are any of you aware of such a device? any slide rules seemingly fit this description?
( and not to be obtuse, I've dreamt of having something similar be part of a custom board game to do something like supply and demand based price generation or whatever... inspired also by the game Tzolkʼin: The Mayan Calendar )