Accession Number : ADD011089

Title :   High Security Internal Locking System.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Self,H L

Report Date : 29 May 1984

Pagination or Media Count : 8

Abstract : The present invention relates to multiple lock control of a locking system and more particularly to an improved multiple lock control of a locking system which has a protective plate and a lock control of the boltwork drive mechanism. The present method of locking large industrial doors is external mounted hardware consisting of some type of latching mechanism capable of being locked with an external padlock, or merely a hasp arrangement locked with a padlock. Because they are externally mounted these types of mechanisms offer little or no resistance to unauthorized forcible entry. There then is a need for an internal locking and boltwork drive mechanism for large hinged and rolling doors, known as industrial doors. This document describes a locking system that consists of two locking mechanisms protected by a drill resistive shutter plate. The shutter plate can be rotated to expose a first lock which when unlocked allows it to be further rotated to uncover the second lock. Upon unlocking the second lock, the drive for the main bolt lock can then be actuated.

Descriptors :   *Patent applications, *Locking(Mechanics), *Locking fastener devices, Internal, Bolts, Doors, Security, Inventions, Naval research

Subject Categories : Couplers, Fasteners, and Joints

Distribution Statement : APPROVED FOR PUBLIC RELEASE