The safety pin as an object dates back to 1849; it was invented in 1849 by Walter Hunt. He literally made it in three hours to pay off a $15 debt. Yes, really. He even patented it — but then sold the patent rights for $400. Safe to say he may have second-guessed that one once the thing blew up.
What’s wild is that Hunt didn’t even think that this little hole in the coil would become a curious phenomenon more than 150 years later. But here we are.
The Best Kind of Everyday Engineering
To be honest, safety pins are an incredible functional design turn. They’re inexpensive, straightforward and somehow batshit useful. From fashion fixes and first aid to D.I.Y. projects and diaper duty (hello, vintage cloth diapers), they’ve weathered the test of time. And that’s in part thanks to the sort of small design details like those in a hole in a safety pin. It’s one of those “you don’t see it until you really see it” type of things.
Makes you think about how many more common tools have hidden features we never knew about, right? Like the hole in the pot handle (yup, that’s for your spoon), or that little groove you see at the bottom of plastic bottles (pressure control!). Engineering is truly lowkey amazing.
The Hole’s There for a Reason
If you’ve read this far, congrats; you’re now one of the 2% of humans who know what the hole in a safety pin is for. To recap:
It’s a crucial section of the spring mechanism.
It allows for tension and snap-back.
It is a touchstone during the manufacturing process.
It may even have some useful DIY applications if you’re crafty.
So next time you employ a safety pin — whether you’re mending a wardrobe malfunction or fastening it onto your punk jacket — thank that humble hole. It’s doing more than you knew it could.
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