Monday, August 07, 2006

Boolean Padlock

The gate is locked if padlock 1 AND padlock 2 are locked.

Sometimes you need to share a padlock for a locker/storage/gate/garage. Rather than use a combination lock or buy an extra key for the padlock, you can use this simple idea.

The bar can be any shape: A rod or 'U' shape with holes at each end.

This lock was at Fort Baker under the truss section of the Golden Gate Bridge. I imagine one lock belongs to the GG District, and the other one belongs to contractors constructing a security fence.

Update March 7th, 2009: The gate to the Army Corps of Engineers Pier in Sausalito.


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