Locks – Operating mechanism – Using a powered device
Patent
1992-07-22
1994-03-08
Gall, Lloyd A.
Locks
Operating mechanism
Using a powered device
70361, 70387, 70389, E05B 4700
Patent
active
052917665
DESCRIPTION:
BRIEF SUMMARY
FIELD AND BACKGROUND OF THE INVENTION
The present invention relates to a lock with locking function released by inserting a key card with a magnetized region, in which the front edge of the key card entrains a slide which is released by the magnetic tumbler pins.
The known locks of this type are developed in the manner that they possess a slide having a magnetic tumbler pin. For the accommodation of the tumbler pins, mounting recesses are provided in the slide and the tumbler pins cooperate with a suitably polarized key card. By the insertion of the proper key card, the magnetic tumbler pins leave a blocking plate so that a displacement of the slide can be effected by means of the key card.
SUMMARY OF THE INVENTION
The object of the invention is so to develop a lock of the above type in a manner simple to manufacture that a certain variation in profile with respect to the key card can be obtained in addition to increased security.
As a result of the invention, a lock of the above-mentioned type is created which, in addition to increased security, has the advantage of a variation in the profile of the key card. The key card to be introduced into the lock need not only be adapted in its opening code to the lock, but it must also have the proper profile. If the profile is absent, the key card can, it is true, be inserted, but it cannot move the slide. The supplementary tumbler which scans the profile of the key card stands, in this connection, as blocking element in the way within the region left free by the magnetic tumbler pins. The profile of the key card and the supplementary tumbler must accordingly be adapted to each other. Variations are possible in the development of the profile of both the supplementary element and the arrangement in the region left free by the magnetic tumbler pins. The development in accordance with the invention makes it possible to produce master key cards at little additional expense. The proven principle of magnetic tumblers which cooperate with the key card need not be discarded. One advantageous further development resides in forming the supplementary tumbler of a springless pin which can be moved by the movement of the slide into a hole in the key card. The suitably shaped key card can accordingly be inserted completely into the insertion shaft for the key card. Upon the subsequent movement of the slide, the pin, however, is moved into the hole in the key card. Therefore, the key card represents the space into which the pin can move. When a key card which has no hole is used, the evasion space is absent and accordingly no movement of the slide can take place. Control advantages in connection with the displacement of the pin result from the fact that the pin is tapered conically at both ends and that the tip facing the insertion shaft for the key card passes through a blocking plate. After insertion of the key and with the commencement of the forward movement of the slide produced by the key card the pin is moved away via its one frustoconical end while its other frustoconical end extends into the hole in the key card. If the blocking plate extends over the pin, it must form the necessary free space for the pin to pass through the blocking plate. In all cases the free space must be sufficiently large in order that the forward displacement of the pin is not prevented by the blocking plate. If the diameter of the magnetic tumbler pins is selected for the pin, then practically any mounting recess for the magnetic tumblers can be equipped with the supplementary pin. This is, to be sure, to be taken into consideration upon the shaping of the blocking plate.
BRIEF DESCRIPTION OF THE DRAWINGS
One embodiment of the invention will be described below with reference to the accompanying drawings, in which:
FIG. 1 shows a door provided with a lock developed in accordance with the invention, seen in the direction looking at the edge of the door,
FIG. 2 shows a correspondingly developed key card by itself,
FIG. 3 is a top view of the lock,
FIG. 4 is a rear view of the lock,
FIG. 5 is
REFERENCES:
patent: 1163470 (1915-12-01), Schoell
patent: 3418833 (1968-12-01), Kerr
patent: 3995460 (1976-12-01), Sedley
patent: 4253320 (1981-03-01), Schwab et al.
patent: 4576025 (1986-03-01), Kassza et al.
patent: 4676083 (1987-06-01), Sedley et al.
patent: 4918957 (1990-04-01), Eisermann
Farber Martin A.
Gall Lloyd A.
Schulte-Schlagbaum Aktiengesellschaft
LandOfFree
Lock with locking function released by inserting a key card with does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Lock with locking function released by inserting a key card with, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lock with locking function released by inserting a key card with will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-147915