Locks – Operating mechanism – Using a powered device
Patent
1988-10-04
1990-05-15
Smith, Gary L.
Locks
Operating mechanism
Using a powered device
70278, 70279, 70395, 70409, 70413, E05B 4900
Patent
active
049246860
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Technical Field
The invention relates to a contact device for transmitting electrical signals between a lock and key in a cylinder lock with a stator housing. A rotor is arranged therein with mechanical holding devices and a key channel having a portion in which contact elements for the signal transmission are present, as well as a key with an integrated electronic information carrier. On the key barb in a portion beside the mechanical codings, contact points are arranged.
2. Description of the Prior Art
Cylinder locks of this kind are used where the security of the known, purely mechanical cylinder locks no longer satisfy the requirements, and additional electronic security means are arranged both on the key and on the lock. Setting the key to such cylinder locks with at least one memory element which contains a magnetic or electronic code, is known. In this lock is a corresponding reading device which may consist of a simple electronic reading unit or one or more microprocessors. For transmitting the stored data from the key to the lock, optical, inductive or mechanical contact elements may be used. The key and cylinder lock in such locking devices are exposed to many disturbing influences, such as soiling, deformation, strong magnetic fields, etc., and there are often disturbances in use with such locks and keys set with added electronic elements. This occurs especially where the transmission of the stored data takes place through optical or inductive contact elements.
Keys and locks in which electronic elements with security information are combined with mechanical holding devices or codings have only been in widespread use quite recently. It has been found that the use of mechanical contacts assures the highest security in the transmission of signals. Because of the high degree of miniaturization of the known mechanical cylinder locks, and the needed long life of contact parts between lock and key, the shaping of contact elements in locks presents extremely great difficulties. Most of the contact elements known today do not satisfy in cylinder locks. Such a cylinder lock with security in cylinder locks. Such a cylinder lock with the respective key is known from German Patent No. 3,245,681. In the key described there, incisions are arranged on the key barb in which pin holding devices engage when the key is inserted in the lock. These pin holding devices are supported in a rotor which can rotate in the stator housing of the cylinder lock. If the key incisions agree with the penetration depth of the pin holding devices, the mechanical blocking between rotor and stator housing is removed. In addition to this mechanical coding or holding, at the end of the key barb is arranged an electronic security system. For this, there is present on the key barb a data carrying ring, for example, in the form of a magnetic strip or with a light or electrooptical point or strip screening. In the lock is arranged, in the portion of the data carrier on the key, a reading head which, without contact, produces the contact for the passage of information between key and lock. This contact or reading unit decodes the data contained on the key and checks it for agreement with the data stored in the lock. If there is agreement, then through an electromagnet and a blocking element, the rotary movement of the rotor is released, and the lock can be opened. In this arrangement, the number of possible locking variations, through the superimposing of the electronic system on the mechanical, is greatly increased. But the system described here is extremely prone to disturbance since foreign particles may collect on the data carrier on the key barb. The transmission of data between key and lock is disturbed or even prevented. Also, the data stored on the data carrier on the key barb may be changed through strong magnetic fields or other external influences, purposely or involuntarily. In this way, this lock-and-key system greatly loses in security and is extremely prone to disturbances. Disturbances in the
REFERENCES:
patent: 3347072 (1967-10-01), Rose
patent: 3550410 (1970-12-01), Toepfer
patent: 3787812 (1974-01-01), Armstrong
patent: 4326125 (1982-04-01), Flies
patent: 4393672 (1983-07-01), Gelhard
patent: 4458512 (1984-07-01), Gelhard
patent: 4663952 (1987-05-01), Gelhard
patent: 4712398 (1987-12-01), Clarkson et al.
Dino Suzanne L.
R. Berchtold AG
Smith Gary L.
LandOfFree
Contact device for transmitting electrical signals between a loc does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Contact device for transmitting electrical signals between a loc, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Contact device for transmitting electrical signals between a loc will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-614107