Safe relocking system

In a safe enclosure having door means to be selectively locked, bolt means movable from a retracted non-locking position to an extended position wherein said door means is locked, means connected to said bolt means to move the same between the retracted and the extended positions, and a door lock mechanism mounted on the interior of said door means including a bolt member movable between a retracted position and an extended position wherein it blocks said bolt means and prevents movement thereof from the extended locking position to the retracted position, a relocking system comprising:

• solenoid means;
• second bolt means actuatable by said solenoid means and movable between a non-blocking position and a blocking position wherein it blocks said bolt means and prevents movement thereof to the non-locking position;
• and circuit means for controlling energization of said solenoid means, said circuit means including a detector circuit means mounted between said door lock mechanism and the interior of said door means, and a circuit monitoring network to control said solenoid means to move said second bolt means to a blocking position when said detector circuit is altered by an attempt to attack said door lock mechanism.