Door and frame assembly, for nuclear fall-out shelter, includes provision for locking from outside

摘要

The assembly includes a locking system (7) for the door (1). The moving component (9) blocks hinge (3) operation. An interface connects to the exterior of the shelter. The operating system (14) for the moving component is controlled from outside the shelter, through a communication interface e.g. a keypad for code entry. An Independent claim is included for a corresponding method of locking a nuclear fall-out shelter.