Improvement in an electromagnetic door lock device.

摘要

The improvement is in an electromagnetic door lock device which is connected to the underside of the top of a door frame. An armature is attracted to the energized electromagnet and is connected to the top of the door for movement between a resting unlocked position directly on top of the door and an upwardly extending locked position adjacent the underside of the energized electromagnet. The armature which has a protrusion extending from one or both of the two opposite sides and the electromagnet carries one or a pair of tab plates connected to one or both of the opposite ends of the electromagnet and having a depending tab which intercepts the armature only when the latter is in the upwardly extended position, so as to lock the door shut. The improvement also includes a pair of depending tabs on each tab plate defining a preferably rectangular notch therebetween, which notch extends up from the bottom of the plate and is substantially wider than the preferably rectangular protrusion and is adapted to receive it to lock it in place. The two tabs of each tab plate are disposed predetermined distances from the vertical centerline of the tab plate so that the relative position of the tabs are adjustable by reversing the tab plate. The protrusions can have carrying width and be removably attached to the armature. The brackets and tab plates can be integral with or without the electromagnet.