Wednesday, January 2, 2008

Keyring - amazing invention

Did it ever come to your thoughts that keyring is such a simple yet useful innovation? It's simply based on a spring mechanism where 2 coils of ring is held together in a default compressed state. When force is applied to input key into the spring's coil, the spring expands and we can loop the key into the coil. Hence, when the key pass through the mid portion of the entire spring coil where the end and head of coil meet, the key is exactly in the "middle" of the spring and held together by circle, which is the spring in compressed state once again.

A simple mechanism invented in a time so long that no one remember who and when it took place. Yet we have been using the same principle up to now without notable modification to the design. /salut

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