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How Pinwheel Calculators Work

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Published on Jul 2, 2012

A visual explanation of how pinwheel calculators work. Pinwheel calculators were invented in the 1870's and popular for almost 100 years. The specific details described in this video are for the Triumphator Model K, but the mechanisms are very similar in all pinwheel calculators.

I have been asked about how division can be performed on pinwheel calculators. A good explanation can be found on this web page:
http://www.vintagecalculators.com/htm...

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