Yesterday I found a fascinating gate along my hiking trail: simple mechanical engineering that mimics advanced .

Let's say 4 different officers want to share the ability to unlock this gate independently, but they don't want to use a shared key for some security reasons. For example, they might want to quickly disable or replace one of the 4 keys in case its owner gets fired or leaks it.

How can they achieve this using common padlocks and iron moving parts?

@kaia Don't you need to open all 4 locks to open this one?


@kaia Oh, I see... removing one peg creates enough slack to slide the latch out of its keeper...

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@kaia But the linear design seems simpler...

Perhaps the circular padlock carousel is more tamper resistant? No... I would just cut off or bend the peg...

@kaia @codewiz That's probably the most useless thing that I have ever seen.
And beside doing something clean you can either just use a brute force tool or chemical reaction.

@codewiz @kaia It could be possible to create a design inspired from this one that would require removing N locks out of X to allow a latch to slide.

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