I've seen lots of gates locked like this, mostly for access roads. All different types of utility companies need a way in so they each have their own lock.
It's pretty common to see lock chains on industrial sites where several different companies need access. You close a gate with a chain, and then just insert padlocks in place of chain links, so any one lock opens the whole thing.
It is, in effect, a mechanical OR gate. There are also mechanical AND gates, where you have to remove all the locks before the thing will open. Those are typically used to lock out electrical circuits when people are working on them.
Sooner70 on May 1st, 2017 at 01:56 UTC »
Love stuff like this. If you're into stuff like this, OP, you might want to check out this thread... https://www.reddit.com/r/mildlyinteresting/comments/3tvwaj/this_gate_is_designed_so_anyone_with_a_key_to_any/
TheUnRealTylerDurden on May 1st, 2017 at 02:14 UTC »
I've seen lots of gates locked like this, mostly for access roads. All different types of utility companies need a way in so they each have their own lock.
DrColdReality on May 1st, 2017 at 03:37 UTC »
It's pretty common to see lock chains on industrial sites where several different companies need access. You close a gate with a chain, and then just insert padlocks in place of chain links, so any one lock opens the whole thing.
It is, in effect, a mechanical OR gate. There are also mechanical AND gates, where you have to remove all the locks before the thing will open. Those are typically used to lock out electrical circuits when people are working on them.