Programmable electronic lock

Details Programmable electronic lock Programmable electronic lock

1995-06-06

1997-01-07

Hajec, Donald T.

Registers

Systems controlled by data bearing records

Credit or identification card systems

34082531, G06K 701

Patent

active

055919502

ABSTRACT:
A programmable electronic provides security among multiple users, allows independent use by multiple users of different types, and is modularly adaptable to various applications. Security is provided by the automatic updating of a lock code if an inserted card's key code bears a predetermined relation to the stored lock code. The present invention allows multiple types of users to access a given lock without affecting lock codes associated with other types or invalidating the stored lock codes of other users of the same type. For example, in a hotel room lock, a maid's key will not change the code for a guest's key, and other maid's keys will still open a lock after a first maid has accessed the lock if their lock codes are stored in the lock. The present invention also provides an additional functions circuit which allows add-on functions to be attached to the basic circuit to fit the needs of a particular site. Some examples of add-on functions include: a real time clock, a timetable function, a privacy function, an office function, a keyboard function, and a secret code function.

REFERENCES:
patent: 4095739 (1978-06-01), Fox et al.
patent: 4283710 (1981-08-01), Genest et al.
patent: 4743898 (1988-05-01), Imedio
patent: 5198643 (1993-03-01), Miron et al.
patent: 5260551 (1993-11-01), Wiik et al.

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