Locks – Operating mechanism – Using a powered device
Patent
1994-11-02
1996-08-20
Gall, Lloyd A.
Locks
Operating mechanism
Using a powered device
70384, E05B 4700
Patent
active
055467784
DESCRIPTION:
BRIEF SUMMARY
FIELD AND BACKGROUND OF THE INVENTION
The present invention relates to a closure system composed of a lock and several keys in which the closing of the lock, determined by magnetically controlled tumblers, can be modified in the manner that the locking code of the lock which corresponds initially to the code of the first key can be varied by the repositioning of at least one tumbler member within the lock to the code of a subsequent key, the coding being formed by individual permanent magnets which are arranged in openings in a slide and, by means of correspondingly positioned magnetization regions of a key which can be brought into a position parallel to the slide, can be lifted out to a blocking plate, whereupon the slide can be displaced into a lock-open position, a part of the permanent magnets being intended as recoding magnets.
In one known lock of the type in question, the slide receives carriers which are in toothed engagement with each other and rotatably associated with the slide, each of the carriers being provided with a recoding magnet. In this connection, provision is made so that by means of the subsequent key, the carriers having the recoding magnets can be displaced, changing the locking code. The first key is thereby cleared.
SUMMARY OF THE INVENTION
The object of the invention is to develop a lock of this type in a simple manner so that the possibilities of variation for changing the locking code are increased.
This object is achieved in a lock of the type in question in the manner that the tumbler member is developed as an adjusting part (33) seperate from the slide (10) and associated with the recoding magnet in such a way that the tumbler insertion opening for the recoding magnet is displaceable from the aligned position for the recoding magnet.
As a result of this development, an increased possibility of variation for changing the locking code is present. In order to change the locking code, the recoding magnet need not be brought now from its position into a different position. This is done rather by changing the position of the tumbler member, developed as an adjusting part, which is associated with the recoding magnet. Together with a displacement of the adjusting part, its tumbler insertion opening for the recoding magnet also comes out of the aligned position with respect to it. If, with an aligned position of the tumbler insertion opening with the recoding magnet, a key is inserted which effects a repelling of the recoding magnet in the direction towards the tumbler insertion opening, the slide cannot be displaced forward. Its displacement therefore requires a key which is so magnetized in the corresponding region that it attracts the recoding magnet, so that the latter does not enter into the tumbler insertion opening. The most different versions can be produced on this basis.
One variant is characterized by the fact that an adjusting part has several tumbler insertion openings of different diameter and/or depth. If, for instance, tumbler insertion openings of different diameter are selected, then a displacement of the recoding magnet, caused by the correspondingly magnetized key, is only possible when the tumbler insertion opening is of the same diameter as, or larger than, the corresponding recoding magnet. It is also possible to develop the recoding magnets in two parts, the length of the section of the recoding magnet associated with the adjusting part corresponding to the depth of the tumbler insertion opening.
Another alternative is characterized by the fact that at least one recoding magnet corresponds in its length to the thickness of the slide and, upon coming against the wide surface of the adjusting part, is lifted out of its blocking position with respect to the blocking plate. In such a position of the adjusting part, the slide is displaceable by means of the key--for instance a key card. However, if the adjusting part is so displaced that a tumbler insertion opening lies opposite the recoding magnet, it, the recording magnet, can, in case of corresponding mag
REFERENCES:
patent: 4312198 (1982-01-01), Sedley
patent: 5074135 (1991-12-01), Eisermann
patent: 5267459 (1993-12-01), Sedley
Farber Martin A.
Gall Lloyd A.
Schulte-Schlagbaum Aktiengesellschaft
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