Mechanical security system for card operated lock in door or window has a metal slider which covers the key hole

摘要

A security lock is operated by a security card and has a mechanical slider which slides or swings to cover the key hole and which, in the closed position, presents a smooth outer appearance with no indication of the location of the key hole. The slider is released by inserting the security card and pushing aside the slider, after which the key can be inserted to open the door.