Switch cabinet door lock

Details Switch cabinet door lock Switch cabinet door lock

1997-09-30

1999-06-29

Meyers, Steven

Locks

Operating mechanism

Key

70427, 70455, 70DIG63, E05B 1302

Patent

active

059162821

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

This invention is related generally to door locks and, more particularly, to door locks for a switch door cabinet.


BACKGROUND OF THE INVENTION

This type of lock is known from DE 86 05 436 U1. This known lock serves to make access to the door lock depend on authorization and to protect it from the influence of weather. This is not accomplished optimally by using the illustrated design, since the cover lock is always exposed and there is not sufficient security with regard to unauthorized access.


OBJECTS OF THE INVENTION

It is an object of this invention to provide a lock for a switch door cabinet overcoming some of the problems and shortcomings of devices of the prior art.
Another object of this invention is to provide a lock for a switch door cabinet that increases security fundamentally with regard to unauthorized access.
Still another object of the invention is to provide a lock for a switch door cabinet that is adequately protected from the influences of the weather. How these and other important objects are accomplished will be apparent from the following descriptions and from the drawings.


SUMMARY OF THE INVENTION

The invention involves a locking mechanism for a switch cabinet door comprised of: (1) a door; (2) a lock plate, connected to the door, said lock plate having both a door lock upon it and a hole; (3) a first cover portion adjustably mounted on the lock plate and moveable thereon between a closed position covering the door lock and an open position exposing the door lock; (4) a cover lock for locking the first cover portion in the closed position; (5) a second cover portion affixed with respect to the lock plate and overlapping the first cover portion in its closed position; and (6) a lock shield supported on the first cover portion.
In a particular embodiment of the invention, the door lock is constructed as a turnbuckle lock and the cover lock is constructed as a lock cylinder. In a specific version of this embodiment, the lock shield is capable of rotating. In a more specific version of the embodiment, the turnbuckle lock is lodged in a lock cabinet that has an upper and lower side. The lock cabinet is inserted in the hole of the lock plate and the cover lock has a locking element that locks at the upper side of the lock cabinet when the first cover portion is in the closed position.
In another embodiment of the invention, the second cover portion is integrally molded to the lock plate.
In a preferred embodiment of the invention, the lock cylinder is restrained by a wall so as not to rotate in the first cover portion. In still another preferred embodiment, a first cross piece is molded on to the second cover portion, a second cross piece is molded on to the first cover portion and the first cross piece and second cross piece fit together when the first cover portion is in the closed position.
In a more preferred embodiment of the invention, the lock plate contains at least one lateral groove and the first cover portion has at least one guide piece that engages the lateral groove. In a specific version of this embodiment, a stop pin is inserted in a lateral groove on the lock plate, the guide piece contains a recessed indentation and the stop pin and indentation fix the first cover portion on the lock plate while allowing movement between the closed and open position.
In still another preferred embodiment of the invention, the first cover portion has an opening in one of its lateral walls and a cover is attached over the opening. The lock cylinder is positioned in the first cover portion such that its long axis is parallel to the door (and horizontal) and the lock cylinder is accessible through the opening in the lateral wall of the first cover portion.
In yet another preferred embodiment of the invention, a fastening screw attaches the lock plate to the door, a fastening screw extends into the first cover portion, the first cover portion includes a stop and the fastening screw and the stop secure the first cover portion in the open position. In a specific v

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patent: 4884424 (1989-12-01), Meyer
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patent: 5555752 (1996-09-01), Fitzpatrick
patent: 5560235 (1996-10-01), Aucoin

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