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Tape Measure Alternative for the EDC Crowd: Crichton Coins
Brass measuring discs
If anyone has an inexhaustible imagination, it's the makers of EDC stuff.
"Ever needed to take an accurate measurement round a bend? Whether you're in design, carpentry, fashion, architecture, or sewing, the Crichton Coin is a compact and reliable brass measuring tool that allows you to accurately measure curves and design details with ease."
"Using your thumb and index finger you can roll with confidence and precision."
Fifty bucks a pop for either Imperial or metric. $82 if you roll with both.
I so want to see the "MacGyver" episode where he saves the day with one of these.
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Comments
Why not.... do imperial on one side, and metric on the other?
Because then you'd have, e.g., circumferences of 6 inch on one side and 152.4 mm on the other, meaning you'd need to do ugly calculations to come up with the total length when spinning for more than one revolution.
I question how accurate it even can be regardless of how
well it's designed, how do you know you're rolling it in a straight
line?
Add a bearing and some caps and it's a fidget spinner. Plus, that way it's easier to roll. Somehow this feels both over- and under-designed, which is a shame given the price.
There might be a functionality issue with making it spin too freely, like it slips a bit and gives inaccurate measurements.
If slipping is a concern, I would think the higher- friction pivot of your fingers would be more likely to cause it. That said, even if a completely free-spinning bearing does somehow cause issues, they could still include a cap with more friction. Having just a hole in the middle to rotate around feels like something is missing, as if the design isn't finished yet.
These look great. I use homemade ones in my shop for measuring length of scrolls. It's an old idea called a traveler. They can be accurate within reason. The correct tool for certain jobs.
I refuse to believe that the data provided by that… fancy washer is reliably more accurate than eyeballing. I wanna see stats!
I want light and heavy clicks for 1/8ths and whole inches. Or maybe it's just flattened slightly in inch increments?
Agreed on some sort of tactile feedback. I was thinking a small bump or notch where you pinch your fingers so you can feel the revolutions. Just one per revolution so you can quickly count longer measurements, then look closely for the final bit. You could buy it as-is, and use a file to add a small notch, just enough to feel it.