When I first saw the initial drawing I thought "Cool, a rolling ruler!"That might be different than what you thought of, but a circular rolling ruler with English (or is it Imperial?) on one side and Metric on the other would be a neat idea. and likely handy for more people.
Quote from: n4vgm on March 29, 2014, 12:13:51 AMWhen I first saw the initial drawing I thought "Cool, a rolling ruler!"That might be different than what you thought of, but a circular rolling ruler with English (or is it Imperial?) on one side and Metric on the other would be a neat idea. and likely handy for more people.I thought about this for a tool coin, but inches and metric dont match. 1 inch is 2.54mm.
"put a notch in the 12 o'clock position so that you know by feel that there has been a complete rotation. That way if the circumference of the coin is three inches you will know without even looking that you have rolled it all the way around four times, so the thing you are measuring must be a foot long."Doing it that way makes it work for both measuring systems on either side whereas putting a wee bump every inch does nothing for the metric crowd.Again, sorry to hijack the original concept especially since I'm only an "armchair challenge coin designer!"
I think in the past some coins have been made in different materials. Why not in (slightly) different sizes? One for metric and one for imperial? Or finding a "round" number where both measurements coincide (no fractions on either side). This last option might be better, only one size/model to be made.
Quote from: microbe on March 29, 2014, 11:40:33 AMQuote from: n4vgm on March 29, 2014, 12:13:51 AMWhen I first saw the initial drawing I thought "Cool, a rolling ruler!"That might be different than what you thought of, but a circular rolling ruler with English (or is it Imperial?) on one side and Metric on the other would be a neat idea. and likely handy for more people.I thought about this for a tool coin, but inches and metric dont match. 1 inch is 2.54mm. 2.54 cm.
"the reasonable circumference would be 10 cm"We Americans were supposed to have embraced the Metric system decades ago anyway so if you do this just go Metric on one side and motto(s) on the other.