Locks – Operating mechanism – Using a powered device
Patent
1991-05-20
1992-07-28
Luebke, Renee S.
Locks
Operating mechanism
Using a powered device
307 101, 70394, 70409, 70413, 33540, E05B 1920
Patent
active
051332027
ABSTRACT:
A decoder is provided for disk tumble locks which is electrically rather than mechanically operated. A plurality of separate keys each has a blade sufficiently long to extend through all of the disks in the lock. At least one cut is provided in the blade of each key. The depth of the cut in each key is different, the cut of each key being coordinated to a different depth of disk from among the known alternative disk depths for the given tuumbler lock to be decoded. The base surface of each cut contains discrete electrical contact connected by a discrete conductor to a point on the key which is externally accessible when the key is fully inserted into the lock. Each contact is positioned on its key so that, when the key is inserted into the lock keyway, an electrically conductive circuit is completed by the disk if the depth of the disk corresponds to or exceeds the depth of the cut. By alignment of the contact with a disk, a discrete electrical circuit will extend from the externally accessible positive point on the key when the contact is aligned with a disk of appropriate depth. If keys are sequentially inserted into the keyway, beginning with the key of deepest cut and gradually progressing toward the key of shallowest cut, the key first completing the electrical circuit associated with any disk will complete a circuit indicating the depth of that disk, thus decoding the lock.
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"The Latest About VATS", Bill Phillips, Mar. 1990, pp. 12-14, Keynotes.
"VATS Update", Shirl Schamp, Mar. 1990 National Locksmith pp. 62-63.
Boucher D. M.
Luebke Renee S.
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